Alarm Interpretation

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION

ALARMS INTERPRETATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

BTGJ1_1_ALM

BEARING METAL TEMP GEN #1 HIGH

The generator bearing metal temperature #1 is very high

BTGJ1_2_ALM

BEARING METAL TEMP GEN JOURNAL #1 HIGH

The generator bearing metal temperature (journal #1) is high

BTGJ2_1_ALM

BEARING METAL TEMP GEN #2 HIGH

The generator bearing metal temperature #2 is very high

BEARING METAL TEMP GEN JOURNAL #2 HIGH BEARING METAL TEMP TURBINE JOURNAL #1 HIGH BEARING METAL TEMP TURBINE JOURNAL #1 HIGH BEARING METAL TEMP TURBINE JOURNAL #2 HIGH BEARING METAL TEMP TURBINE JOURNAL #2 HIGH BEARING METAL TEMP TURBINE JOURNAL #3 HIGH BEARING METAL TEMP TURBINE JOURNAL #3 HIGH BEARING METAL TEMP THRUST ACTIVE 2 HIGH BEARING METAL TEMP THRUST ACTIVE 5 HIGH BEARING METAL TEMP THRUST ACTIVE 8 HIGH BEARING METAL TEMP THRUST INACTIVE 2 HIGH BEARING METAL TEMP THRUST INACTIVE 5 HIGH

The generator bearing metal temperature (journal #2) is high

BTGJ2_2_ALM BTJ1_1_ALM BTJ1_2_ALM BTJ2_1_ALM BTJ2_2_ALM BTJ3_1_ALM BTJ3_2_ALM BTTA1_2_ALM BTTA1_5_ALM BTTA1_8_ALM BTTI1_2_ALM BTTI1_5_ALM

OMMO_5_9E_E0858_EN_V3

The turbine bearing metal temperature (journal #1) is high The turbine bearing metal temperature #1 is very high The turbine bearing metal temperature (journal #2) is high The turbine bearing metal temperature #2 is very high The turbine bearing metal temperature (journal #3) is high The turbine bearing metal temperature #3 is very high The bearing metal temperature (thrust active) is high The bearing metal temperature (thrust active) is high The bearing metal temperature (thrust active) is high The bearing metal temperature (thrust inactive) is high The bearing metal temperature (thrust inactive) is high

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ACTIONS TO BE TAKEN Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping Check bearing. Check lube oil system and drain piping

Date : 10/2011 Page :1/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

BTTI1_9_ALM

BEARING METAL TEMP THRUST INACTIVE 9 HIGH

The bearing metal temperature (thrust inactive) is high

Check bearing. Check lube oil system and drain piping

L12H_ACC_ALM

PROTECTIVE MODULE ACCELERATION TRIP _ HP

L12H_ALM

ELECTRICAL OVERSPEED TRIP _ HP

L12H_FLT_ALM L12H_P_ALM

LOSS OF PROTECTIVE HP SPEED INPUTS PROTECTIVE MODULE OVERSPEED TRIP _ HP

The speed control system has not limited turbine speed with the trip limits (fault detected by P module). The turbine trips during the electrical over-speed test. The speed control system hF not limited turbine speed within the trip limits. The turbine trips during the electrical over-speed test. Card VPRO fault Protective module over-speed fault.

The trip circuit has been tripped by mechanical over-speed action.

L12HBLT_ALM

OVERSPEED BOLT TRIP _ HP

L12HF_ALM

Control speed signal loss and the unit trips. CONTROL SPEED SIGNAL LOSS _ HP Power supply fault, ground, short-circuit open. Speed magnetic pickups fault.

L12HFD_C_ALM L12HFD_P_ALM

CONTROL SPEED SIGNAL TROUBLE - HP PROTECTIVE SPEED SIGNAL TROUBLE - HP

Determine and repair before restarting (mechanical, electrical or fuel or speed control trouble). Check the card VPRO in the module P Check the module over-speed (power supply, short, link, cut). Search the cause of this problem: Check electronic over-speed system. Check proper operation and setting of over-speed bolt assembly. Repair before starting and reset manually the mechanical over-speed limit switch on the over-speed bolt. Check speed system. Check supply, connections. Check the logic circuit. Check speed magnetic pickups.

Signal from speed sensors is faulty.

Check speed sensors and wiring.

Signal from speed sensors is faulty.

Check speed sensors and wiring.

L20FTY_ALM

CRUDE TO DIST FUEL XFER FAULT

Transfer valve fault

L20FTZ_ALM

DIST TO CRUDE FUEL XFER FAULT

Transfer valve fault

L25A_ENAB_AL

K25A RELAY HAS NOT BEEN ENABLED

Synchronization permissive disable

OMMO_5_9E_E0858_EN_V3

Determine and repair before restarting (mechanical, electrical or fuel or speed control trouble).

All right reserved Copyright Revision : A

Check proper operation of transfer valve Check limit switch. Check proper operation of transfer valve Check limit switch. Check synchronization permissive

Date : 10/2011 Page :2/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L26AAH_ALM

ATOMIZING AIR TEMP. HIGH

Temperature high at the atomizing air compressor input.

L26AAL_ALM

ATOMIZING AIR TEMPERATURE LOW

Temperature high at the atomizing air compressor input.

L26BW_ALM L26CR1H_ALM L26CR1HH_ALM L26CR2H_ALM L26CR2HH_ALM L26CR3H_ALM L26CR3HH_ALM

ON LINE WATER WASH TEMP NOT OK CRANKING MOTOR TEMP HIGH PHASE 1 CRANKING MOTOR TEMP VERY HIGH PHASE 1 TRIP CRANKING MOTOR TEMP HIGH PHASE 2 CRANKING MOTOR TEMP VERY HIGH PHASE 2 TRIP CRANKING MOTOR TEMP HIGH PHASE 3 CRANKING MOTOR TEMP VERY HIGH PHASE 3 TRIP

Check water supply to the atomizing air pre-cooler, isolating valve position flow restrictions. Check proper operation of thermostatic valve VTR_2 and temperature switch 26AA_1. Check water supply to the atomizing air pre-cooler, isolating valve position flow restrictions. Check proper operation of thermostatic valve VTR_2 and temperature switch 26AA_1.

On line temp NOT OK

Check heater system

The temperature of the phase R of the cranking motor is high The temperature of the phase R of the cranking motor is high The temperature of the phase S of the cranking motor is high The temperature of the phase S of the cranking motor is high The temperature of the phase T of the cranking motor is high The temperature of the phase T of the cranking motor is high

Check the phases R of the cranking motor Check the electrical circuit Check the phases R of the cranking motor Check the electrical circuit Check the phases S of the cranking motor Check the electrical circuit Check the phases S of the cranking motor Check the electrical circuit Check the phases T of the cranking motor Check the electrical circuit Check the phases T of the cranking motor Check the electrical circuit Check air conditioners (proper operation, power supply). Clean the air conditioner filters, if necessary. Check the proper operation of the thermocouple 26 CT. NOTE: The control compartment doors must be closed. Check the temperature switch 26 FD_1. Check the forwarding distillate fuel system. Check the heater system of the distillate fuel (if used). Check the proper operation of the temperature switch 26 FD_1. Check the heating system.

L26CTH_ALM

CONTROL PANEL TEMPERATURE HIGH

Air conditioners not maintaining proper temperature.

L26FDH_ALM

DISTILLATE FUEL TEMPERATURE HIGH

The temperature of the distillate fuel is too high.

L26FDL_ALM

GAS OIL HEATER _ TEMPERATURE LOW

The temperature of the gas oil is low. Temperature switch fault.

OMMO_5_9E_E0858_EN_V3

ACTIONS TO BE TAKEN

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Date : 10/2011 Page :3/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L26FDLY_ALM

LIQUID FUEL TEMPERATURE MEASURE FAULT

The temperature of the liquid fuel is faulty.

Check the temperature switch 26 FD_1. Check the forwarding distillate fuel system. Check the heater system of the distillate fuel (if used).

Fuel pump #1 temperature fault

Check the pump # 1

Fuel pump #2 temperature fault

Check the pump # 2

Gas fuel temperature very is high.

Check the proper operation of the temperature switch FTG. Check the gas skid (motor, fan, circuit, etc…)

The measure of the heavy fuel temperature is faulty.

Check temp sensor.

L26FDPT1H_ALM L26FDPT2H_ALM L26FTGH_ALM L26FTH_ALM L26FU1H_ALM

L26FU1L_ALM L26FU2LA_ALM L26FUPT1H_ALM L26FUPT2H_ALM L26GGC1_ALM L26GGC2_ALM L26GGH1_ALM L26GGH2_ALM L26GS10T12HA L26GS1HH_ALM L26GS1T3H_AL

FUEL PUMP #1 TEMPERATURE FAULT FUEL PUMP #2 TEMPERATURE FAULT GAS FUEL TEMPERATURE HIGH HEAVY FUEL TEMP. MEASURE FAULT HEAVY FUEL OIL HIGH TEMPERATURE DURING HFO OPERATION LIQUID FUEL TEMP LOWER THAN HEAT TRACING SETPOINT HEAVY FUEL TEMPERATURE LOW HIGH TEMPERATURE INSIDE PUMP P201 - CHANGE OVER HIGH TEMPERATURE INSIDE PUMP P202 - CHANGE OVER GEN COLD AIR TEMP HIGH GEN COLD AIR TEMP VERY HIGH SHUTDOWN GEN HOT AIR TEMP HIGH GEN HOT AIR TEMP VERY HIGH SHUTDOWN GEN STATOR WIND. CENT. TEMP HIGH #10-11-12 GEN STATOR WIND. CENT. TEMP VERY HIGH #1-2-3 GEN STATOR WINDING CENTER TEMP HIGH #1-2-3

OMMO_5_9E_E0858_EN_V3

Generator cold gas temperature high

Check the temperature measure system of the heavy fuel oil Check RTD Check the temperature measure system of the liquid fuel Check RTD "ftl" . Check the temperature measure system of the heavy fuel. Check the temperature measure system of the heavy fuel Check RTD fupt1 Check the temperature measure system of the heavy fuel Check RTD fupt2. Check cooling and sealing system

Generator cold gas temperature high shutdown

Check cooling and sealing system

Generator hot gas temperature high

Check cooling and sealing system

Generator hot gas temperature high Normal shutdown

Check cooling and sealing system

Generator Overload 2 of 3 Generator RTDs failure Generator Overload 2 of 3 Generator RTDs failure Generator Overload 2 of 3 Generator RTDs failure

Decrease the generator load Check RTD and associated connections Decrease the generator load Check RTD and associated connections Decrease the generator load Check RTD and associated connections

heavy fuel oil temperature is faulty.

Liquid fuel temperature is too low. Heavy fuel temperature is too low. Liquid fuel temperature is too high. Liquid fuel temperature is too high.

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Date : 10/2011 Page :4/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME L26GS2HH_ALM L26GS3HH_ALM L26GS4HH_ALM L26GS4T6H_AL L26GS7T9H_AL L26HA11HH_AL L26HA11LL_AL L26HAHH_ALM L26HALL_ALM L26HGHH_ALM L26HGLL_ALM L26HTHH_ALM L26HTLL_ALM L26PMBT1L_AL L26PMBT2L_AL

L26QA_ALM

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

GEN STATOR WIND. CENT. TEMP VERY HIGH #4-5-6 GEN STATOR WIND. CENT. TEMP VERY HIGH #7-8-9 GEN STATOR WIND. CENT. TEMP VERY HIGH #10-11-12 GEN STATOR WINDING CENTER TEMP HIGH #4-5-6 GEN STATOR WINDING CENTER TEMP HIGH #7-8-9 HEAT VENT VERY HIGH TEMP. IN DLN COMPARTMENT HEAT VENT VERY LOW TEMP. IN DLN COMPARTMENT HEAT VENT VERY HIGH TEMP. IN AUXILIARY COMPARTMENT HEAT VENT VERY LOW TEMP. IN AUXILIARY COMPARTMENT HEAT VENT HIGH TEMP. IN LOAD COMPARTMENT HEAT VENT VERY LOW TEMP. IN LOAD COMPARTMENT HEAT VENT VERY HIGH TEMP. IN TURBINE COMPARTMENT HEAT VENT VERY LOW TEMP. IN TURBINE COMPARTMENT PERF MONIT INSTRUM BOX #1 TEMP VERY LOW PERF MONIT INSTRUM BOX #2 TEMP VERY LOW

Generator Overload 2 of 3 Generator RTDs failure Generator Overload 2 of 3 Generator RTDs failure Generator Overload 2 of 3 Generator RTDs failure Generator Overload 2 of 3 Generator RTDs failure Generator Overload 2 of 3 Generator RTDs failure

Decrease the generator load Check RTD and associated connections Decrease the generator load Check RTD and associated connections Decrease the generator load Check RTD and associated connections Decrease the generator load Check RTD and associated connections Decrease the generator load Check RTD and associated connections

DLN compartment temperature very high

Start cooling fans

DLN compartment temperature very low

Check cooling fans

Accessories compartment temperature high

Start cooling fans

Heating and ventilation fault

Check heating and ventilation system

Heat vent very high temp. In load compartment

Check cooling and sealing system

Heat vent very low temp. In load compartment

Check cooling and sealing system

Gas turbine compartment temperature high

Start cooling fans

Turbine compartment temperature low.

Check the ventilation system.

Performance monitoring instrumentation box #1 temperature regulation fault Performance monitoring instrumentation box #2 temperature regulation fault

Check performance monitoring instrumentation box #1 temperature regulation Check performance monitoring instrumentation box #2 temperature regulation Check for proper operation of the lube oil heat exchangers, cooling water fans (proper rotation) and temperature regulating valve VTR_1. Check for proper operation of the temperature switch 26 QA_1.

LUBE OIL HEADER TEMP. HIGH

OMMO_5_9E_E0858_EN_V3

Lube header temperature above recommended limits. (See piping schematic).

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Date : 10/2011 Page :5/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L26QN_ALM

LUBE OIL TANK TEMP. LOW

Lube tank temperature below recommended limits (see piping schematic).

L26QT_ALM

LUBE OIL HEADER TEMP. HIGH TRIP

Lube header temperature above recommended limits.

L26WC_FLT

COOLING WATER TEMPERATURE FAULT

Cooling water temperature fault.

COOLING WATER TEMPERATURE VERY HIGH

Cooling water system fault. Pipes, radiators are dirty. Cooling fan motor fault. Temperature sensor fault. Leakage.

WASTE TANK TEMPERATURE HIGH WATER INJECTION COMPARTMENT TEMPRATURE VERY HIGH WATER INJECTION COMPARTMENT TEMPERATURE VERY LOW

Waste tank temperature high Water injection compartment temperature fault. Thermocouple fault. Water injection compartment temperature fault. Thermocouple fault.

L27BLN11_ALM

BATTERY CHARGER AC UNDERVOLTAGE

Battery charger AC under-voltage. Charger faulty.

L27BLN12_ALM

BATTERY CHARGER AC UNDERVOLTAGE

Battery charger AC under-voltage. Charger faulty.

L27BLN13_ALM

BATTERY CHARGER AC UNDERVOLTAGE

Battery charger AC under-voltage. Charger faulty.

L27BLN21_ALM

BATTERY CHARGER # 2 AC UNDERVOLTAGE

Battery charger # 2 AC under-voltage. Charger faulty.

L26WCHH_ALM

L26WP1_ALM L26WRHH_ALM L26WRLL_ALM

OMMO_5_9E_E0858_EN_V3

All right reserved Copyright Revision : A

ACTIONS TO BE TAKEN Check for proper operation of the lube oil tank heaters. Starting is inhibited if the header temperature is low. Check for proper operation of the temperature switch 26QN_1. Check for proper operation of the lube oil heat exchangers, cooling water fans (proper operation) and temperature regulating valve VTR_1. Check the temperature switches 26 QT_1A and 26 QT_1B setting points. Check the proper operation of the temperature sensor. Check the cooling water system. Check cooling water system (fan motor, radiator, cleanliness of circuit, skid). Check the proper operation of the temperature sensor 26 WC. Check the correct circulation of the water in the circuit. Check the proper operation of the water pump. Check waste tank Check the thermocouple AT-WI-1. (Wiring, connection, etc…). Check the thermocouple AT-WI-1. (Wiring, connection, etc…). Check battery charger AC breaker. Check voltage magnitude. Check the proper operation of the battery charger. Check battery charger AC breaker. Check voltage magnitude. Check the proper operation of the battery charger. Check battery charger AC breaker. Check voltage magnitude. Check the proper operation of the battery charger. Check battery charger AC breaker. Check voltage magnitude. Check the proper operation of the battery charger.

Date : 10/2011 Page :6/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L27BLN22_ALM

BATTERY CHARGER # 2 AC UNDERVOLTAGE

Battery charger # 2 AC under-voltage. Charger faulty.

L27BLN23_ALM

BATTERY CHARGER # 2 AC UNDERVOLTAGE

Battery charger # 2 AC under-voltage. Charger faulty.

L27BN_12_ALM

AC BUS NORMAL INFORMATIONS MISMATCH

Bus synchronizing potential not available.

L27BN_ALM

BUS UNDERVOLTAGE - NO AUTO SYNCH

Bus synchronizing potential not available.

L27BP1N_ALM

DC SUPPLY #1 CRITICAL FAULT

DC supply #1 critical fault

L27BP2N_ALM

DC SUPPLY #2 CRITICAL FAULT

DC supply #2 critical fault

L27BZ_12_ALM

AC BUS UNDERVOLTAGE INFORMATIONS MISMATCH

Bus synchronizing potential not available.

L27DZ_ALM

BATTERY DC UNDERVOLTAGE

Battery system voltage is low. Battery charger is not functioning properly. Excessive drain on the batteries. Bad cells in battery.

L27GPP1_ALM

GEN PROTECTION MOD 1 125V SUPPLY FAULT

Gen protection mod1 125v supply fault

OMMO_5_9E_E0858_EN_V3

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ACTIONS TO BE TAKEN Check battery charger AC breaker. Check voltage magnitude. Check the proper operation of the battery charger. Check battery charger AC breaker. Check voltage magnitude. Check the proper operation of the battery charger. Check bus PT fuses and wiring. Do not use auto synchronizing or manual synchronizing until problem is resolved. Check relay 27B_1,2. Check bus PT fuses and wiring. Do not use auto synchronizing or manual synchronizing until problem is resolved. Check relay 27B_1,2. Check bus PT fuses and wiring. Do not use auto synchronizing or manual synchronizing until problem is resolved. Check relays 27B_1. Check bus PT fuses and wiring. Do not use auto synchronizing or manual synchronizing until problem is resolved. Check relays 27B_2. Check bus PT fuses and wiring. Do not use auto synchronizing or manual synchronizing until problem is resolved. Check relay 27B_1,2. Check battery charger for proper operation, correct excessive drain on battery, check for bad cells. Check battery charger fuses. NOTE: The gas turbine should not be operated unless DC power is available to the emergency DC lube oil pump. Check power supply

Date : 10/2011 Page :7/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME L27GPP2_ALM L27GRDAC_ALM L27GRDDC_ALM

ALARM TEXT GEN PROTECTION MOD 2 125V SUPPLY FAULT GAS DETECT RACK 230 VAC POWER SPPLY FLT GAS DETECT RACK 125 VDC POWER SPPLY FLT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

Gen protection mod2 125v supply fault

Check power supply

Gas detect rack 230 VAC power supply fault

Check power supply 230 VAC of gas detection module

Gas detect rack 125 VDC power supply fault

Check power supply 125 VDC of gas detection module

L27MC1AN_ALM

MCC UNDERVOLTAGE

Motor control center under-voltage.

L27MC1N_ALM

MCC UNDERVOLTAGE

Motor control center under-voltage.

L27MC2N_ALM

MCC UNDERVOLTAGE

Motor control center under-voltage.

L27N_ALM

NORMAL SUPPLY LOW VOLTAGE

Normal incoming under-voltage

L27QEL_ALM

DC MOTOR UNDERVOLTAGE (LUBE OIL)

DC power not supplied to emergency DC pump. 125 VDC supply fault. Pump fault Breaker opens.

L27S_ALM

STAND BY SUPPLY LOW VOLTAGE

Emergency incoming under-voltage

L27TF_ALM

INLET FITER POWER SUPPLY FAULT The power supply of the inlet filter is faulty G60A PROTECTION POWER SUPPLY G60A protection power supply fault-trip FAULT

L27X1_ALM

OMMO_5_9E_E0858_EN_V3

All right reserved Copyright Revision : A

Check that power is supplied to the motor control center. Check 380 V on the bus bars. Check breaker: transformer supply 16 KVA and the transformer. Check relay 27 MC. Check that power is supplied to the motor control center. Check 380 V on the bus bars. Check breaker: transformer supply 16 KVA and the transformer. Check relay 27 MC. Check that power is supplied to the motor control center. Check 380 V on the bus bars. Check breaker: transformer supply 16 KVA and the transformer. Check relay 27 MC. Check Normal power supply 415 VAC at the Normal entry of MCC Check power to DC lube pump (MCC breaker on). Check the fuses and the relay 27 QE. Check the proper operation of pump motor. Check the mechanical status of the pump. NOTE: The gas turbine should not be operated unless DC power is available to the emergency DC lube pump. Check Emergency power supply 415 VAC at the Emergency entry of MCC Check the power supply Check power supply

Date : 10/2011 Page :8/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME L27X2_ALM L27X3_ALM

ALARM TEXT

POSSIBLES CAUSES

G60B PROTECTION POWER SUPPLY G60B protection power supply fault-trip FAULT T60A PROTECTION POWER SUPPLY T60A protection power supply fault-trip FAULT

230VAC normal power supply fault #2

Check 230VAC normal power supply

230VAC UPS power supply fault #3

Check 230VAC UPS power supply

115VAC power supply fault #4

Check 115VAC power supply

One of the detectors operating when no flame is present or flame detection before the firing sequence.

L28FD_SD

CHAMBER FLAMED OUT DURING SHUTDOWN

Chamber flamed out during shutdown.

L28FDT_ALM

LOSS OF FLAME - TRIP

Failure of flame detectors or loss of flame.

START_UP FUEL FLOW EXCESSIVE TRIP

On the liquid fuel circuit: Fuel leakage. Fuel loop system fault. On the gas fuel circuit: Purchaser gas supplies low pressure. Loss of the pressure between VSR and VGC. Gas leakage. Transmitters fault.

L30AC_APU_AL L30AC1_ALM L30AC2_ALM L30AC3_ALM L30AC4_ALM

ATOMIZING AIR TEMPERATURE FAULT AIR PROCESSING UNIT FAULT 400VAC POWER SUPPLY FAULT #1 230VAC NORMAL POWER SUPPLY FAULT #2 230VAC UPS POWER SUPPLY FAULT #3 115VAC POWER SUPPLY FAULT #4

OMMO_5_9E_E0858_EN_V3

Check power supply

Atomizing air temperature fault. Thermocouples fault. Air processing unit problem Power supply 400VAC fault

FLAME DETECTOR TROUBLE

L30AAT_ALM

Check power supply

Check for proper operation of the flame detection system. Check that the flame detectors quartz windows are clean. Repair or replace if necessary. Check the fuel supply and the fuel control. Check the fuel nozzles. Check for following: fuel being supplied to the combustors, flame in all chambers, damaged crossfire tubes, or combustors. Check for proper control valve position and fuel pressure. Check for proper operation of the flame detectors 28 FD. On the liquid fuel circuit: Check for leakage. Check tripping setting point. Check fuel loop system operation. Check the operation of the bypass versus the control signal. On the gas fuel circuit: Check the purchaser gas supply. Check the opening of the transmitters isolation valves. Check the transmitters 96 FG_2A, 2B and 2C. Check the LVDT setting value and the calibration of the valve VSR. Check the thermocouples AAT-1A and 2A. (Wiring, connection, etc…). Check air processing unit Check 400VAC power supply

L28FD_ALM

L2SFT_ALM

ACTIONS TO BE TAKEN

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Date : 10/2011 Page :9/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L30BT_ALM

TURBINE COMPARTMENT VENTILATION FAULT

The turbine compartment ventilation is faulty.

L30BTA_ALM

BEARING METAL TEMPERATURE HIGH

The temperature of the bearing metal is high.

L30BW_ALM

TURBINE COMPARTMENT VENT. CHANGE OVER WASHING SKID FAULT

Air fan changeover. Turbine compartment air fan fault. The washing skid is faulty.

L30CBC_ALM

COMP BLD VLV FAILURE TO OPEN

The compressor bleed valve failed to open.

L30BTX_ALM

ACTIONS TO BE TAKEN Check the ventilation system of this compartment (power supply, motors, fans, electrical circuit...). Check the position of the vent flap. Check the lube oil collector temperature. Research the thermocouple, which occurred this alarm. Check the indications of it. Check the air fan system (power supply, motors, fans, relay, electrical circuit...). Check the washing skid. Check the proper operation of the purge valve.

FIRE PROTECTION SYSTEM TROUBLE

Fire protection system problem.

Check the power supply of fire protection system. Check fire detectors and the electrical circuit. This trouble must be corrected as soon as possible. NOTE: Before this search, the fire protection must be inhibited. Do not forget to put again in service as soon as the maintenance is finished. Refer to specific chapters for more information about the fire protection.

L30CD_ALM

COOLDOWN TROUBLE

Unit failed to go on cool-down, or the cool-down cycle was aborted prior to cool-down timer timeout Trouble during the cool-down sequence. Turning gear motor fault. Supply fault

Check the turning gear system. Check the voltage supplies. Check the proper operation of the turning gear motor 88TG.

L30COM_EXFLT

EXCITER TO MKVI COMMUNICATION FAULT

Exciter to mkVI communication fault

Check power supply

L30CC_ALM

L30COMM_IO_R

L30D_CTRL_OT L30DBEXX_ALM

VCMI IO STATE EXCHANGE FOR FAILED CONTROLLER OVERTEMPERATURE EXCITER FAIL - ABORTING DB CLOSURE

OMMO_5_9E_E0858_EN_V3

Controller overtemperature

Check R controller is on Check R controller is OK Check the 3 IONet cables are OK Check IONet cable is connected on the R controller VCMI board Refer to specific chapter.

Exciter fail - aborting db closure

Check exciter

No more communication with R controller

All right reserved Copyright Revision : A

Date : 10/2011 Page :10/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME L30DC1_ALM L30DPFLT_ALM L30EX_FSP L30EX_FTS L30EX_RS L30FAX_ALM L30FAX1_ALM L30FAX2_ALM L30FC1_ALM L30FC2_ALM

ALARM TEXT 125VDC POWER SUPPLY FAULT #1 ALARM DEW POINT TEMPERATURE SENSOR FAULT EXCITER FAILURE TO STOP EXCITER FAILURE TO START EXCITER NOT READY TO START CRUDE OIL FWD SMOKE INHIBITION PUMP CHANGE OVER HEAVY FUEL ADDITIVE PUMP #1 FAULT HEAVY FUEL ADDITIVE PUMP #1 FAULT COOLING WATER FAN 1 ELECTRICAL TROUBLE COOLING WATER FAN 2 ELECTRICAL TROUBLE

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

115 VDC MCC voltage lost

Check 115 VDC MCC electrical circuit Check voltage feeding

Dew point temperature sensor fault

Change dew point temperature sensor

Exciter failure to stop Exciter failure to stop Exciter not ready to start

Check exciter cubicle Check exciter cubicle Check the condition to start

For information

For information

Heavy Fuel Additive pump #1 fault

Check the pump # 1

Heavy Fuel Additive pump #2 fault

Check the pump # 2

The motor of the cooling water system fan #1 is faulty The motor of the cooling water system fan #2 is faulty

L30FD_ALM

FAILURE TO IGNITE

Failure to fire within the one-minute period.

L30FDX1_ALM L30FDX2_ALM L30FORCED_ALM

FUEL FORWARDING PUMP #1 FAULT FUEL FORWARDING PUMP #2 FAULT FORCED LOGIC SIGNAL DETECTED

Fuel forwarding pump #1 fault Fuel forwarding pump #2 fault One alarm or more is forced

L30FPG2L_ALM

GAS FUEL INTERVALVE PRESSURE (P2) LOW

The high line inter-valve ventilation is faulty. Emergency motor fault Power supply fault

L30FUX_ALM

CRUDE OIL FWD CRUDE OIL FORWARDING PUMP FAULT

Pump, motor fault.

OMMO_5_9E_E0858_EN_V3

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Check electrical circuit Check motor fan #1 Check electrical circuit Check motor fan #2 Check that AC power is supplied to the ignition system. Check the fuel supply. Check if isolating valves on flame detectors are open. Check the proper operation of spark plugs and flame detectors. Check. Fuel forwarding pump #1 Check. Fuel forwarding pump #2 Unforced all the alarms Check gas compartment ventilation. Check motors. Check mechanical status of fans. Check pressure switches. Check the pump and corresponding motor Check if the motor is supplied. Check the pipes, valves, and filters, purge vents, leaks. Check the pressure switches (operation and setting).

Date : 10/2011 Page :11/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L30FUX1_ALM

HEAVY FUEL FEEDING PUMP #1 FAULT

Motor fault Power supply fault Pump fault

Check the mechanical status of the motor and the pump Check what the circuit is correctly positioned Check the supply of the motor drawer and the motor Check the fuses, breaker and the connection of the motor

See alarm : L30FUX1_ALM

See alarm : L30FUX1_ALM

L30G60A_ALM L30G60B_ALM

HEAVY FUEL FEEDING PUMP #2 FAULT GLOBAL ALARM FROM G60A GLOBAL ALARM FROM G60B

Global alarm from G60A Global alarm from G60B.

L30GGC_ALM

GEN COLD AIR TEMP FAULT

Generator RTD fault.

L30GGH_ALM

GEN HOT AIR TEMP FAULT GAS DETECTION RACK SYSTEM FAULT GEN STATOR WINDING CENTER TEMP SNSR FLT #10-11-12 GEN STATOR WINDING CENTER TEMP SNSR FLT #1-2-3 GEN STATOR WINDING CENTER TEMP SNSR FLT #4-5-6 GEN STATOR WINDING CENTER TEMP SNSR FLT #7-8-9 HEAT VENT DLN COMPARTMENT HEATER IN TROUBLE HEAT VENT AUXILIARY COMPARTMENT HEATER IN TROUBLE HEATER NOT DESIGNED TO RUN GT ON - STOP HEATER HEAT VENT LOAD COMPARTMENT HEATER IN TROUBLE HEAT VENT TURBINE COMPARTMENT HEATER IN TROUBLE HEAT VENT WATER INJ COMP VENT. ELECTRICAL FAULT

Generator temperature fault

Check G60A Check G60B Check RTD and associated connections for proper signal and replace faulty RTD. Check cooling and sealing system Check the gas detection rack Refer to the specific chapter about maintenance Check RTD and associated connections for proper signal and replace faulty RTD. Check RTD and associated connections for proper signal and replace faulty RTD. Check RTD and associated connections for proper signal and replace faulty RTD. Check RTD and associated connections for proper signal and replace faulty RTD.

L30FUX2_ALM

L30GRD_ALM L30GSC10T12A L30GSC1T3_AL L30GSC4T6_AL L30GSC7T9_AL L30HA11X_ALM L30HAX_ALM L30HEATR_ALM L30HG1X_ALM L30HTX_ALM L30JS_ALM

OMMO_5_9E_E0858_EN_V3

Gas detection rack system fault Sensors fault detection Sensors fault detection Sensors fault detection Sensors fault detection Heat vent DLN compartment heater in trouble

Check heat vent DLN compartment heater

Heat vent auxiliary compartment heater in trouble

Check heat vent auxiliary compartment heater

Discrepancy between start order and feedback

Check feedback match with heater status

Heat vent load compartment heater in trouble.

Check the heater.

Heat vent turbine compartment heater in trouble

Check heat vent turbine compartment heater

Heat vent water injection compartment vent.

Check the heater.

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Date : 10/2011 Page :12/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L30JSX_ALM

HEAT VENT WI COMPARTMENT VENT. CHANGE OVER

Air fan changeover. Water injection compartment air fan fault.

L30LOAH_ALM

BEARING DRAIN TEMPERATURE HIGH

Bearing fault. Lube oil fault. Lube oil cooling system fault. Leakage.

Check the air fan system (power supply, motors, fans, relay, electrical circuit...). Check lube oil feed and drain piping Check bearings and lube oil system. Check thermocouples. Check lube oil cooling. Check the correct circulation of the lube oil. Check for leakage.

L30LSI_ALM

BEARING DRAIN TEMPERATURE HIGH AIRCRAFT WARNING LIGHT ALARM

L30LTA

LOAD TUNNEL TEMPERATURE HIGH

L30LTTH_ALM

LUBE OIL THERMOCOUPLE FAULT SYNC INHIBITED-MAN (FVR) REG ACTIVE

L30LOAHH_ALM

L30MRSYNC_AL

OMMO_5_9E_E0858_EN_V3

See alarm : L30LOAH_ALM

See alarm : L30LOAH_ALM

Aircraft warning ligh alarm

Thermocouple fault

For information Check the proper operation of ventilation system. Check the operation of the ventilators (rotation). Check the operation of the motors 88 TK1 and 2. Check the thermocouple TT_IB_1 (connection, shortcircuit, cut off, position). Check the sealing and the cleanliness of the pipes. Check the proper operation of thermocouples LTTH1 to 3.

Sync inhibited man (FVR) reg active.

For information

Automatic shutdown. Ventilation system fault. Thermocouple fault.

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Date : 10/2011 Page :13/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

L30PPDA_125P_ALM

PPDA 125V PBUS FEED FAULT

L30PPDA_AC_IN_1_ALM L30PPDA_AC_IN_2_ALM

PPDA AC INPUT 1 FAULT PPDA AC INPUT 2 FAULT PPDA/JPDD 125V POWER FEED FAULT PPDA PBUS NOT REGULATING PPDA PBUS NOT REGULATING PPDA PBUS NOT REGULATING PPDA PBUS SOURCE FAULT PPDA PBUS SOURCE FAULT PPDA PBUS SOURCE FAULT

L30PPDA_JPDD_125V_ALM L30PPDA_PBUS_R_ALM L30PPDA_PBUS_S_ALM L30PPDA_PBUS_T_ALM L30PPDA_SRC_R_ALM L30PPDA_SRC_S_ALM L30PPDA_SRC_T_ALM

POSSIBLES CAUSES

Voltage failure Fuse fault Wrong barcode in software Wrong firmware loaded in IO pack IO pack Ethernet link or power supply disconnected

Check alarm number in GEH-6721 vol II Check board power supply is correctly connected, else connect it. Check IO pack Ethernet link or power supply is correctly connected (Leds on IO pack must be active), else connect it. Check IR port of the IO pack is protected by its metallic plate, else turn the plate until IR port is hidden. Check barcode is identical on board and inside IO hardware configuration in the software, else change barcode number, build and download. Check firmware is correct in the IO pack, else download again the firmware with actual ToolbowST release. Check electrical cables are not cut, else replace cables. Check fuse have not melt, if yes, replace fuse. Check voltage is present, if not, re start power supply.

See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM

See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM

See : L30PPDA_125P_ALM

See : L30PPDA_125P_ALM

See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM

See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM See : L30PPDA_125P_ALM Check the generator bearing system (power supply, pumps, electrical circuit...). Check the pressure switch. Check the relay 51 QV. Check the motor 88 QV (proper operation). Check the density analyzer.

L30QB1_ALM

GENERATOR BRG LIFT PUMPS ELECTRICAL FAULT

The lift pumps are faulty

L30QV_ALM

OIL MIST ELIMINATOR FAULT

The oil mist separator fan motor is in trouble.

L30SG1_ALM

DENSITY ANALYSER FAULT  1

The density analyzer is faulty.

OMMO_5_9E_E0858_EN_V3

ACTIONS TO BE TAKEN

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Date : 10/2011 Page :14/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L30SPA

COMBUSTION TROUBLE

Faulty thermocouples, gas path hardware or uneven distribution of fuel to the fuel nozzles.

L30SPT

HIGH EXHAUST TEMP. SPREAD TRIP

Faulty thermocouples, gas path parts or uneven distribution of fuel to the fuel nozzles.

L30SPTA L30T60A_ALM L30TWW_ALM

L30TXA_ALM

L30TXAH1 L30UPSCS_ALM L30UPSMAJ_AL L30UPSMIN_AL L30UPSMOD_AL

EXHAUST THERMOCOUPLE TROUBLE T60A GLOBAL A WATER WASH INHIBIT_WHEELSPACE TEMP. HIGH

EXHAUST TEMPERATURE HIGH

FIRST FAILED HIGH EXHAUST THERMOCOUPLE BATTERY CHARGER - CS FAULT INVERTER MAJOR UPS FAULT INVERTER MINOR GROUP FAULT INVERTER MODULE GROUP FAULT

Faulty thermocouple. T60A global alarm The washing procedure is inhibited because the wheelspace temperature is too high. Thermocouples fault. The exhaust gas temperature is excessive. Thermocouples fault. Fuel control system fault. Ventilation system fault.

Analyze data for trends. At earliest shutdown, check thermocouples. Perform bore scope or combustion inspection. Check flow divider, fuel pressures. Check for plugged nozzles. Analyze data for trends. Perform bore scope or combustion inspection. Check flow divider, fuel pressures. Check for plugged nozzles. Check thermocouples and wiring. Change if necessary. Check T60A Check the temperature and wait for an adequate wheelspace temperature. Check the thermocouples. Check all thermocouples. Replace any bad thermocouples. If problem is not thermocouples, isolate portion of control system causing problem. Check the temperature control loop and the fuel control system.

See alarm : L30TXA_ALM

See alarm : L30TXA_ALM

Inverter static converter group fault MCC UPS major fault Inverter minor group fault Inverter module group fault

Check inverter static converter group Check MCC UPS Check inverter minor group Check inverter module group fault Check the ventilation system of this compartment (power supply, motor, fans, electrical circuit...). Check the pressure switch. Check the position of vent flap.

L30VG_ALM

LOAD COMPT COOLING FAN CHANGE OVER

The load compartment ventilation is faulty.

L30VGX_ALM

LOAD COMPARTMENT VENTILATION FAULT

See alarm : L30VG_ALM

OMMO_5_9E_E0858_EN_V3

ACTIONS TO BE TAKEN

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See alarm : L30VG_ALM

Date : 10/2011 Page :15/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L30VL_ALM

GAS CABINET _ EMERGENCY FAN ‘’ON’’

Fan fault: changeover to emergency fan. Motor fault. Pressure switch fault.

L30VLX_ALM

GAS COMPARTMENT VENTILATION FAULT

The gas compartment ventilation is faulty.

L30WCX_ALM

COOLING WATER PUMP FAULT (CHANGEOVER)

Motor fault Power supply fault Pump fault

L30WCX1_ALM L30WCX2_ALM

COOLING WATER MOTOR # 1 FAULT COOLING WATER MOTOR # 2 FAULT

L30WN_ALM

WATER INJECTION NOT SELECTED

L30WN1_ALM

WATER INJECTION PUMP ELECTRICAL FAULT

L30WQER_ALM L30WR1X_ALM

L30WSA1_ALM

WATER INJ SERVO NOT FOLLOWING OUTPUT HEAT VENT WI COMPARTMENT HEATER IN TROUBLE WHEELSPACE TEMP. DIFFERENTIAL HIGH

L30WSA2_ALM

WHEELSPACE TEMPERATURE HIGH

L32DW_ALM

GENERATOR BREAKER TRIP_REVERSE POWER

OMMO_5_9E_E0858_EN_V3

See alarm : L30WCX_ALM See alarm : L30WCX_ALM Water injection not selected. Water injection has been deselected. Power supply fault Pump fault Difference between the flow measured and the flow wanted

ACTIONS TO BE TAKEN Check the gas skid ventilation system (motors, fans, power supply, etc.) Check the power supply of the motor 88 VL and its protections. Check the pressure switch 63 VL. Check gas compartment ventilation. Check motors, 88 VL _ 1,2. Check mechanical status of fans. Check pressure switches 63 VL _ 1,2. Check the mechanical status of the motor and the pump Check what the circuit is correctly positioned Check the supply of the motor drawer and the motor Check the fuses, breaker and the connection of the motor See alarm : L30WCX_ALM See alarm : L30WCX_ALM Research the cause of the injection deselecting. Check the mechanical status of the pump Check the supply of the pump Check the fuses, breaker and the connection of the pump Check the injection circuit to see why the measured flow is lower than the constant flow

Heat vent WI compartment heater in trouble

Check heat vent WI compartment heater

Excessive differential between wheel-space thermocouples. Defect thermocouples (TTWS_XX). Thermocouples position fault. Combustion fault.

Check thermocouples for shorts, grounds or opens. Replace failures. If condition persists investigate for seal failure. Check the thermocouples position. Check the combustion and regulation system.

High wheel-space temperature (for proper value refer to control specification). Ventilation system fault. Thermocouples fault (TTWS_XX). Turbine fault. Fuel feeding system fault.

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Check thermocouples, investigate for seal failure. Check the ventilation system. Check the proper operation of the thermocouples. Turbine checking. Fuel feeding system checking (skid fuel).

Date : 10/2011 Page :16/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L33ARS_ALM

AC TRANSFER CB SPRING CHARGE FAILURE

AC transfer cb spring charge failure

Check circuit breakers 52AR & 52AS

L33BT_ALM

TURBINE COMPARTMENT VENT. FLAP CLOSED

Flap closed in the turbine compartment. Limit switch fault.

L33CDMN_ALM

AT MIN TNR-REVERSE POWER NOT DETECTED

Transducer fault System of detection fault

Check the position of flap. Determine the cause of the flap closing. Check the limit switch 33 BT. Check the proper operation of the generator watts transducer and open the manually breaker if necessary Check the logic of command

L33CL1_ALM

CO2 LOCK OFF IN ZONE 1

CO2 emission

L33CL2_ALM

CO2 LOCK OFF IN ZONE 2 FIRE PROTECTION DLN COMPT CO2 LOCKED ALARM HEAT VENT AUXILIARY COMPARTMENT DOOR OPEN

CO2 emission

Refer to fire protection panel to determinate the fire zone. The unit should not be operated until the cause has been determined and corrected and the fire protection has been re-established in its normal condition (refilling of CO2 bottles, circuit reset...). Check for the causes of this trip; hot air or fuel or oil leaks, or short-circuits. NOTE: Restarting after an operation of the CO2 system requires that the CO2 system be reset, including all doors and dampers, and the CO2 release mechanism. WARNING: Carbon Dioxide, in a concentration sufficient to extinguish fire, creates an atmosphere that will not support life. It is extremely hazardous to enter the compartment after the CO2 system has been discharged. For further information, refer to Fire Protection System documentation if available. The extent and type of safeguards and personnel warning that may be necessary must be designed to meet the particular requirements of each situation. It is recommended that personnel be adequately trained as to the proper action to take in case of such an emergency. See alarm : L33CL1_ALM

CO2 emission

See alarm : L33CL1_ALM

The door of the compartment auxiliary is open. Limit switch fault.

Check the air inlet filter system. Check the limit switch 33 DT1.

L33CL4_ALM L33DT1_ALM

OMMO_5_9E_E0858_EN_V3

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Date : 10/2011 Page :17/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME L33DT2_ALM L33DT3_ALM L33JS_ALM

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

HEAT VENT AUXILIARY COMPARTMENT DOOR OPEN HEAT VENT AUXILIARY COMPARTMENT DOOR OPEN WATER INJECT COMP FLAP DAMPER NOT CLOSED

The door of the compartment auxiliary is open. Limit switch fault. The door of the compartment auxiliary is open. Limit switch fault.

Check the air inlet filter system. Check the limit switch 33 DT2. Check the air inlet filter system. Check the limit switch 33 DT3.

Water inject comp flap damper not closed.

Check damper

L33PGC_ALM

PRIMARY PURGE VALVES FAILURE TO CLOSE

Either one or both of purge valves VA13_1and VA13_2 not functioning correctly. Either one or both of limit switches 33PG_1 and 33PG3 not functioning correctly.

L33PGO_ALM

GAS FUEL NOZ. PURGE VALVE FAIL TO OPEN

The purge valves VA 13_1 and VA 13_2 failed to open.

L33PLP_ALM

PRIMARY LIQUID FUEL LOW PURGE FAULT

L33PS1C_ALM

VENT VALVE FSV452 NOT CLOSED

L33PS2O_ALM

VENT VALVE LIMIT SWITCH NOT OPEN

L33PSC_ALM L33PSO_ALM L33S_ALM

GENERATOR HOT GAS TEMPERATURE HIGH GAS FUEL VENT VALVE OPEN TROUBLE AUTOMATIC VALVES FAULT

OMMO_5_9E_E0858_EN_V3

No detection of opening on liquid fuel purge system when purge is requested This alarm indicates the wrong position of the vent valve: The valve is blocked Valve fault Limit switch fault This alarm indicates the wrong position of the vent valve: The valve is blocked Valve fault Limit switch fault

Check the proper operation of: _ Purge valves VA13_1 and VA13_2 _ Air valves VA36_1 and VA36_2 _ Solenoid valves 20PG_1 and 20PG_2. Check Speedtronic connections and interface. Check the limit switches 33PG_1 and 33PG_3 for set point and Speedtronic connections. Check the proper operation of the purge valves VA 13_1 and VA 13_2. Check the status of the solenoid valves 20 PG_1 and 20 PG_2. Check the proper operation of the limit switches 33 PG_2 and 33 PG_4. Control liquid fuel purge valve position (hi flow valve) Check that noting is blocking the valve Check the limit switch Check the valve Check that noting is blocking the valve Check the limit switch Check the valve

Generator hot gas temperature high

Refer to specific chapter

Gas Fuel Vent Valve Open position trouble

Check limit switch and valve

Automatic valves fault

Check valve

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Date : 10/2011 Page :18/52

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ALARM TEXT

POSSIBLES CAUSES

L33VG_ALM

LOAD COOLING AIR FLAT DAMPER NOT CLOSED

Damper not closed Limit switch fault

L33VG11_ALM

TURBINE GAS VENT VALVE POSITION FAULT

Turbine gas vent valve position fault. Limit switch fault.

L33VL_ALM

HEAT VENT GAS/DLN COMPT VENT FLAP NOT CLOSED

Compartment flap damper not closed Limit switch fault Valve position fault Limit switch fault Valve position fault Limit switch fault Valve position fault Limit switch fault Valve position fault Limit switch fault Something is blocking the valve

Check what is blocking the valve and remove it

L33WNO_ALM

GAS FUEL SHUT OFF VALVE LIMIT SWITCH NOT CLOSED GAS FUEL SHUT OFF VALVE CLOSED TROUBLE GAS FUEL SHUT OFF VALVE LIMIT SWITCH NOT OPEN GAS FUEL SHUT OFF VALVE OPEN TROUBLE H2O INJ CTRL & XFER VLV FAIL TO CLOSE WATER INJECTION TROUBLE

Check the position of the damper Determine the cause of the flap opening Check the limit switch 33VG Check the proper operation of vent valve 20 VG-1. Check the limit switch 33VG Check the position of the damper Determine the cause of the flap opening Check the limit switch Check valve 20VS position Check limit switch 33VS4 Check valve 20VS position Check limit switch 33VS4 Check valve 20VS position Check limit switch 33VS4 Check valve 20VS position Check limit switch 33VS4

There is a problem in the injection circuit

L39VA_ALM

HIGH VIBRATION ALARM

Vibration at one or more bearings.

Check the injection circuit Monitor vibration readings. Determine the cause of this trouble and repair.

L39VD1_ALM

VIBRATION BN GT. AXIAL SHAFT DISPLACEMENT ALERT VIBRATION BN GT. AXIAL SHAFT DISPLACEMENT DANGER VIBRATION SENSOR DISABLED

L39VD3_ALM

VIBRATION _ START INHIBIT

GT axial shat displacement alert st 1 step GT axial shat displacement alert 2nd step Signal from vibration sensors is faulty. Start inhibited. Vibration protection system problem. Too many sensors in trouble or disabled.

L39VDIFF_ALM

VIBRATION DIFFERENTIAL TROUBLE

L33VS411C_AL L33VS411CX_A L33VS421O_AL L33VS421OX_A L33WNC_ALM

L39VCA_ALM L39VCD_ALM

OMMO_5_9E_E0858_EN_V3

Vibration protection system problem.

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ACTIONS TO BE TAKEN

Check vibration sensors and wiring. Check vibration sensors and wiring. Check vibration sensors and wiring. Check vibration protection system. Check the vibration sensors. Check vibration protection system. Check the level of each sensor and determine the cause of the differential.

Date : 10/2011 Page :19/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

VIBRATION TRANSDUCER FAULT

Vibration detector impedance is not within normal bounds or 3 or more gas turbine sensors are disabled or faulty.

Check impedance or each vibration detector (open or short-circuit). Check the vibration protection system. NOTE: With the 3 or more sensors disabled or faulty, the start is inhibited.

VIB BN GEN BRG #2 RADIAL SHAFT DISPLACEMENT ALERT VIB BN GEN BRG #2 RADIAL SHAFT DISPLACEMENT DANGER VIB BN GT BRG #1 RADIAL SHAFT DISPLACEMENT ALERT VIB BN GT BRG #1 RADIAL SHAFT DISPLACEMENT DANGER VIB BN GT BRG #2 RADIAL SHAFT DISPLACEMENT ALERT VIB BN GT BRG #2 RADIAL SHAFT DISPLACEMENT DANGER VIB BN GT BRG #3 RADIAL SHAFT DISPLACEMENT ALERT VIB BN GT BRG #3 RADIAL SHAFT DISPLACEMENT DANGER VIB BN GEN BRG #1 RADIAL SHAFT DISPLACEMENT ALERT VIB BN GEN BRG #1 RADIAL SHAFT DISPLACEMENT DANGER

Generator bearing 2 radial shat displacement alert 1st step Generator bearing 2 radial shat displacement alert 2nd step GT bearing 1 radial shat displacement alert st 1 step GT bearing 1 radial shat displacement alert 2nd step GT bearing 2 radial shat displacement alert st 1 step GT bearing 2 radial shat displacement danger 2nd step GT bearing 3 radial shat displacement alert 1st step GT bearing 3 radial shat displacement alert 2nd step GT bearing 1 radial shat displacement alert st 1 step GT bearing 1 radial shat displacement alert 2nd step

L39VSD_ALM

HIGH VIBRATION SHUTDOWN

High vibration

L39VT_ALM

HIGH VIBRATION TRIP

High vibration

L39VF_ALM

L39VS10A_ALM L39VS10D_ALM L39VS1A_ALM L39VS1D_ALM L39VS2A_ALM L39VS2D_ALM L39VS3A_ALM L39VS3D_ALM L39VS9A_ALM L39VS9D_ALM

ALARM TEXT

OMMO_5_9E_E0858_EN_V3

All right reserved Copyright Revision : A

Check vibration sensors and wiring. Check vibration sensors and wiring. Check vibration sensors and wiring. Check vibration sensors and wiring. Check vibration sensors and wiring. Check vibration sensors and wiring. Check vibration sensors and wiring. Check vibration sensors and wiring. Check vibration sensors and wiring. Check vibration sensors and wiring. Check for mechanical failures, observe vibration level Determine the cause of this trouble and repair Check the vibration sensor Check for mechanical failures, observe vibration level Determine the cause of this trouble and repair Check the vibration sensor

Date : 10/2011 Page :20/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

The turbine gas is not on Total liquid or total gas

Reduce the load that will be applied to the generator before closing again the generator breaker (network problems). Check the proper operation of the speed relay 14 HS circuit logic. Check fuel system

AFPAT sensor fault

Change AFPAT sensor

Customer damper not in correct status to start GT.

Check damper position

AFPCS sensor fault

Change sensor

Both hydraulic pumps locked out

Refer to specific chapter

Bad signal from load control transducer.

Check the transducer 96 GG (setting point, power supply, link).

L3FS1C_T_ALM

SHUT OFF VALVE SWITCH FAIL TO CLOSED

This alarm indicates the wrong position of the shut off valve: The valve is blocked Valve fault Limit switch fault

Check that noting is blocking the valve Check the limit switch Check the valve

L3FTGL_ALM

GAS FUEL TEMPERATURE LOW RECYCLING

Trip unit. Gas fuel temperature very is low.

L3FTGLT_ALM

GAS FUEL TEMPERATURE GAS TOO LOW

Gas temperature low.

L3FTGLZ_ALM

GAS FUEL TEMPERATURE LOW AFTER RECIRCULATION

Gas fuel temperature low after re-circulation

Check cooling and sealing system

The transfer to heavy fuel is not authorized, because the temperature or pressure of the heavy fuel is not correct.

Check the forwarding heavy fuel system and the heater system (if used). Check the inhibitor system. Check the temperature switch 26 FU_2, 26 FL_2 and pressure switch 63 FU_2 and 63 AD_1.

L3A_ALM

TURBINE UNDERSPEED

l3ACS_ALM

SERVOS CHECK FAULT TRIP AMBIENT PRESSURE MEASUREMENT FAULT DAMPER CUSTOMER START INHIBIT INLET PRESSURE MEASUREMENT FAULT BOTH HYDRAULIC PUMPS LOCKED OUT LOSS OF EXTERNAL SETPOINT LOAD SIGNAL

L3APFLT_ALM L3CP_ALM L3CPRI_ALM L3DWBCOKZ_AL L3DWRF

L3FUZ_ALM

HEAVY FUEL TRANSFER PERMISSIVE TROUBLE

OMMO_5_9E_E0858_EN_V3

The turbine speed is too low (< 95%) when complete sequence is reached (L3) (end of starting sequence).

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Check the proper operation of the temperature switch FTG. Check the gas skid (motor, fan, circuit, etc…) Check the gas heating system. Check the proper operation of the temperature switch 26 GL.

Date : 10/2011 Page :21/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

L3GCVA_ALM

GAS CONTROL VLV NOT FOLLOWING - ALARM

L3GCVFLT_ALM

GAS CONTROL VALVE SERVO TROUBLE

L3GLTSDTC_AL L3GLTSUTC_AL L3GRVA_ALM

SHUT DOWN GAS LEAK TEST COMPLETE START UP GAS LEAK TEST COMPLETE STOP/SPEED RATIO VLV NOT TRACKING ALARM

L3GRVFLT

GAS RATIO VALVE POSITION SERVO TROUBLE

L3GRVT_ALM

STOP/SPEED RATIO VLV NOT TRACKING TRIP

L3IGVFLT_ALM

INLET GUIDE VANE POSITION SERVO_TROUBLE

OMMO_5_9E_E0858_EN_V3

POSSIBLES CAUSES Start inhibited + transfer to fuel if running on gas or transfer to gas inhibited. The gas control valve feedback is abnormal. Supply fault. Sensors defected. Valve and servo-valve fault. Start inhibited + transfer to fuel if running on gas or transfer to gas inhibited. The gas control valve feedback is abnormal. Supply fault. Sensors defected. Valve and servo-valve fault.

ACTIONS TO BE TAKEN

Check LVDT, 96 GC_1, 2 (setting value, wiring). Check the calibration of the VGC. Check the proper operation of the servo-valve 65 GC_1.

Check LVDT, 96 GC_1, 2 (setting value, wiring). Check the calibration of the VGC. Check the proper operation of the servo-valve 65 GC_1.

Shut down gas leak test complete.

No action

Start up gas leak test complete

No action

Valve position fault LVDT fault Start inhibited + transfer to fuel if running on gas or transfer to gas inhibited. The gas ratio valve feedback signal is abnormal. Supply fault. Sensors defected. Valve and servo-valve fault. Valve position fault LVDT fault

Check valve position Check LVDT

Loss of feedback. At start-up, the inlet guide vanes are not closed. At normal speed, the inlet guide vanes are closed.

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Check LVDT, 96 SR (setting value, wiring). Check the calibration of the VSR. Check the proper operation of the servo-valve 90 SR. Check valve position Check LVDT Determine the cause and correct before restarting. The master reset must be initiated before starting. Check the proper operation of the solenoid valve 20 TV_1 and the control system of the jack. Check the setting values of the LVDT 96 TV_1 and 2. Refer to the control specification. Check logic circuit.

Date : 10/2011 Page :22/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

L3LFLT_ALM

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

LIQUID FUEL CONTROL FAULT

Liquid fuel check system has detected an abnormal servo or LVDT position or signal. HP oil fault. Mechanical problem on the bypass.

Check the fuel pressure before the nozzles. Check for the fuel leakage. Check the HP oil pressure and check for leakage. Check if the bypass is not clamped. Check the different devices (setting point, calibration). Check the regulation system.

L3SFLT_ALM

Start inhibited. Lube oil heaters fault (23 QT_1 to 6). LUBE OIL TANK TEMERATURE FAULT Lube oil pump in trouble (88QA_2). Loss of AC. MASTER PROTECTIVE START Turbine not ready to start CHECK ETR FAULT EXHAUST TC VTCC See : L3PTCC_1J1A_FLT COMMUNICATIONS FAULT CONTROL SYSTEM FAULT TRIP Control system fault

L3SMT_ALM

STARTING DEVICE TRIP.

L3TFLT_ALM

LOSS OF COMPRESSOR DISCHARGE Bad signal from compressor pressure transmitter (96 CD). PRESSURE BIAS

L3TMFLT1_ALM

TORQUE CONVERTER GV TROUBLE

L3LTOT_ALM

L3MP_ALM L3PTCC_ALM

L3TNRERRX L3VLST_ALM L3WCTIM_ALM

DWATT TOO LOW TO SUPPORT TNR_TNR LOWER HEAT VENT GAS PRESS ULTRA LOW DOWNSTREAM SSOV ON_LINE WATER WASH INHIBITED

OMMO_5_9E_E0858_EN_V3

Failure of cranking motor to start.

The torque converter guide vane position transducer is damaged or disconnected. Dwatt too low to support tnr_tnr lower

Check the lube oil heaters (23 QT to 6). Check the lube oil circuit. Check the AC supply (415 VAC). Check start check screen on the HMI See : L3PTCC_1J1A_FLT Check control system Check the cranking motor cell, the breaker and the electrical motor. Identify the faulty circuit and repair. CAUTION: Take the safety recommendation for working on medium voltage. Check the transmitters and associated connections. Check the associated connections for proper bias signal. Check the pressure. Check the transducer. Verify the adjustment. Do not restart the unit before it is done. Check fuel supply Check FSR limitation

Gas feeding pressure low

Check the feeding of gas fuel

The ‘’On-line’’ water wash is inhibited because the compressor inlet temperature is low.

To continue the water wash sequence, select in the SPEEDTRONIC MARK V the ‘’Inlet air heating’’ circuit.

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L3WWTDZ_ALM

FALSE START DRAIN TC DIFF HIGH

Spread between the Two TC’s, TC disconnected or broken.

Check TC and connection. Repair wiring or replace TC if found damaged.

L3Z_ALM

FAILURE TO SYNCHRONIZE

Unit did not synchronize and close generator breaker within the normal expected time.

L43ADJ_ALM

VSVO IN CALIBRATION MODE

VSVO in calibration mode

L43CR_ALM L43EX_ALM L43FL_T_ALM L43MAINT_ALM L45FP1_ALM L45FP2_ALM L45FP4_ALM L45FPX_ALM L45FTX1_ALM L45FTX2_ALM L45FTX4_ALM

STARTING MEANS CRANKING MOTOR REMOTE POSITION EX2K MANUAL (FVR) REGULATOR ACTIVE TRANSFER TO LIQUID FUEL FAIL TRIP MAINTENANCE _ FORCING MODE ENABLED FIRE PRE-ALARM IN ZONE 1 FIRE PRE-ALARM IN ZONE 2 FIRE PREALARM ZONE #4 ALARM FIRE PROTECTION - GENERAL FIRE ALARM ZONE 1 & 2 FIRE IN ZONE #1 FIRE IN ZONE #2 FIRE ALARM ZONE #4 ALARM

OMMO_5_9E_E0858_EN_V3

Investigate synchronization system to determine exact cause of problem. Check the stability of the turbine speed control. Finish calibration Set off calibration mode

Starting motor remote selected

No action

EX2K manual (FVR) regulator active

No action

Transfer to liquid fail Transfer during more than 2 minutes Auto calibrate, memory changing or logic forcing mode of operation has been selected. Fire detection in compartment # 1 Fire detection in compartment # 2 Fire detection in compartment # 4

Check liquid fuel system When done with the operation, deselect the operation. See alarm : L33CL1_ALM See alarm : L33CL1_ALM See alarm : L33CL1_ALM

Fire detection in compartment # 1

See alarm : L33CL1_ALM

Fire in zone #1 Fire in zone #2 Fire is detected in Җ4 zone.

See alarm : L33CL1_ALM See alarm : L33CL1_ALM See alarm : L33CL1_ALM

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

L45HA4_ALM

L45HA4H_ALM

L45HA4HH_ALM L45HA4T_ALM

ALARM TEXT

HZD GAS DETEC DLN/AUX COMPT CARD FAULT OF SET 4

HZD GAS DETEC DLN COMP-DLN VENT/GAS CAB HIGH LEVEL HZD GAS DETEC DLN /AUX COMPT#4 VENT/GAS CAB HIGH HIGH LEVEL HZD GAS DETEC HIGH HIGH LEVEL INFORMATION

OMMO_5_9E_E0858_EN_V3

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

A leak of gas is detected in the DLN compartment.

Gas leak detection alarm may be generated either by gas detection loop fault or by a real gas leak. Refer to Gas detection control system cabinet and relevant component literature for detailed fault analysis. Gas leak detection alarm must be considered as high priority. Continued operation of the turbine is not recommended. Proceed to normal shutdown to avoid later trip by higher detection level. For dual fuel machine, do not transfer to liquid fuel. This will not eliminate the leak if situated downstream the gas control valves. The leak shall remain at the same place with other fluid (e.g. purging air). Do not open the door of the enclosure, keep the area around free of people. Access to enclosure is only permitted when the main gas valve is closed and the line depressurised, the unit is stopped, on cooling sequence by ratchet system (Frame 6000B) or by barring system (Other Frame) with issuing of the relevant access permit or permit to work. Visual check the flanges (Refer to Residual risks summary/Maintenance phase) and the flexible metal hoses (Refer to GEK 111694) and all other connections. Pressurise the length/section of pipe according to End User procedure and appropriate precautions. It may be worth to use portable gas detectors and/or leak detection liquids or spray to find what caused the alarm. Repair the leak and reset the alarm after investigation.

A leak of gas is detected in the DLN compartment.

See alarm : L45HA4_ALM

A leak of gas is detected in the DLN/auxiliaries compartment. #4

See alarm : L45HA4_ALM

A leak of gas is detected in the ventilation compartment

See alarm : L45HA4_ALM

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME L45HA5_ALM

L45HA5HH_ALM

L45HA6_ALM

L45HA6HH_ALM L45HGD_PRETA L45HGDHH_ALM L45HGDSD_ALM

ALARM TEXT HZD GAS DETEC DLN/AUX COMPT CARD FAULT OF SET 5 HZD GAS DETEC DLN /AUX COMPT#5 VENT/GAS CAB HIGH HIGH LEVEL HZD GAS DETEC DLN/AUX COMPT CARD FAULT OF SET 6 HZD GAS DETEC DLN /AUX COMPT#6 VENT/GAS CAB HIGH HIGH LEVEL START INHIBITED DUE TO GAS DETECTION FIRST LEVEL HZD GAS DETEC HIGH HIGH LEVEL INFORMATION HAZARDOUS GAS DETECTION FAILURE - SHUT DOWN

OMMO_5_9E_E0858_EN_V3

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

A leak of gas is detected in the DLN compartment.

See alarm : L45HA4_ALM

A leak of gas is detected in the DLN/auxiliaries compartment. #5

See alarm : L45HA4_ALM

A leak of gas is detected in the DLN compartment.

See alarm : L45HA4_ALM

A leak of gas is detected in the DLN/auxiliaries compartment. #6

See alarm : L45HA4_ALM

A leak of gas is detected in the ventilation compartment

Check where the gas is detected An alarm indicate witch compartment is concern See alarm : L45HA4_ALM

A leak of gas is detected in the ventilation compartment

See alarm : L45HA4_ALM

Start inhibited

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

L45HT1_ALM

L45HT1H_ALM L45HT1HH_ALM L45HT1T_ALM L45HT2_ALM

ALARM TEXT

TURB COMPARTMENT GAS LEVEL HIGH-ALM

TURBINE & EXTRACT DUCT COMB GAS LEVEL HIGH' HZD GAS DETEC TURBINE COMPT#1 HIGH HIGH LEVEL TURB COMPARTMENT LEVEL VERY HIGH-TRIP GT VENTILATION DUCT GAS LEVEL HIGH-ALM

OMMO_5_9E_E0858_EN_V3

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

Gas level high detected in the turbine compartment.

Gas leak detection alarm may be generated either by gas detection loop fault or by a real gas leak. Refer to Gas detection control system cabinet and relevant component literature for detailed fault analysis. Gas leak detection alarm must be considered as high priority. Continued operation of the turbine is not recommended. Proceed to normal shutdown to avoid later trip by higher detection level. For dual fuel machine, do not transfer to liquid fuel. This will not eliminate the leak. The leak shall remain at the same place with other fluid (e.g. purging air). Do not open the door of the enclosure, keep the area around free of people. Access to enclosure is only permitted when the unit is stopped, on cooling sequence by ratchet system (Frame 6000B) or by barring system (Other Frame) with issuing of the relevant access permit or permit to work. Visual check the flanges (Refer to Residual risks summary/Maintenance phase) and the flexible metal hoses (Refer to GEK 111694). Pressurise the length/section of pipe according to End User procedure and appropriate precautions. It may be worth using portable gas detectors and/or leak detection liquids or spray to find what caused the alarm. Repair the leak and reset the alarm after investigation.

Turbine compartment level very high.

Check the gas sensors 45 HT-1HH, 2HH and 3-HH

A leak of gas is detected in the turbine compartment. #6

See alarm : L45HT1_ALM

Turbine compartment level very high.

Check for leakage in the gas turbine compartment. Check the gas sensors 45 HT-1HH, 2HH and 3-HH.

Gas level high detected in the GT ventilation duct.

See alarm : L45HT1_ALM

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME L45HT2HH_ALM

L45HT3_ALM

L45HT3HH_ALM

L45HT4_ALM

L45HT4H_ALM

L45HT4HH_ALM

L45HT4T_ALM

L45HT5_ALM

L45HT5HH_ALM

L45HT6_ALM

L45HT6HH_ALM

ALARM TEXT HZD GAS DETEC TURBINE COMPT#2 HIGH HIGH LEVEL HZD GAS DETEC TURBINE COMPT CARD FAULT OF SET 3 HZD GAS DETEC TURBINE COMPT#3 HIGH HIGH LEVEL HZD GAS DETEC TURBINE COMPT CARD FAULT OF SET 4 HZD GAS DETEC TURBINE COMPT VENT DUCT HIGH LEVEL HZD GAS DETEC TURBINE COMPT#4 HIGH HIGH LEVEL HZD GAS DETEC TURBINE COMPTVENTILATION DUCT TRIP HZD GAS DETEC TURBINE COMPT CARD FAULT OF SET 5 HZD GAS DETEC TURBINE COMPT#5 HIGH HIGH LEVEL HZD GAS DETEC TURBINE COMPT CARD FAULT OF SET 6 HZD GAS DETEC TURBINE COMPT#6 HIGH HIGH LEVEL

OMMO_5_9E_E0858_EN_V3

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

A leak of gas is detected in the turbine compartment. #2

See alarm : L45HT1_ALM

A leak of gas is detected in the turbine compartment.

See alarm : L45HT1_ALM

A leak of gas is detected in the turbine compartment. #3

See alarm : L45HT1_ALM

A leak of gas is detected in the turbine compartment.

See alarm : L45HT1_ALM

A leak of gas is detected in the ventilation compartment.

See alarm : L45HT1_ALM

A leak of gas is detected in the turbine compartment. #4

See alarm : L45HT1_ALM

A leak of gas is detected in the ventilation compartment

See alarm : L45HT1_ALM

A leak of gas is detected in the turbine compartment.

See alarm : L45HT1_ALM

A leak of gas is detected in the turbine compartment. #5

See alarm : L45HT1_ALM

A leak of gas is detected in the turbine compartment.

See alarm : L45HT1_ALM

A leak of gas is detected in the turbine compartment. #6

See alarm : L45HT1_ALM

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L48_ALM

TURBINE INCOMPLETE SEQUENCE

Failure of unit to reach complete sequence.

L48CR_ALM

TURBINE SHAFT FAILURE TO BREAK AWAY

The time delay is finished and the turbine shaft does not breakaway. Starting means fault.

L49X_ALM

AUXILIARY MOTOR OVERLOAD

One of the auxiliary motors is overloaded.

L4CT_ALM

CUSTOMER TRIP

Customer trips input to the L4CT logic have caused an automatic trip of the unit.

Check equipment, which is the cause of the problem in the normal sequence: starting system power, torque converter, fuel control, and acceleration loop. Check if the AUTO order has been executed. Check the operation of the auxiliaries. Check the starting means. Check the supplies. Check auxiliary motors to determine which motor is overloaded and the cause of the overloading. On the defective motor, check the overload relay, the fuses (or the CB), and the motor with the cables. Check the set point of the overload relay. Check the fuses FU.1, 2 on the motor overload circuit. Determine which of the customer trip devices caused the trip and correct.

Operator selected excitation off.

For information

Regulation fan block starts

L4EXOFF_ALM L4FCBRUN_ALM L4IGVT_ALM

L4LTTH_T_ALM

EX2K OPERATOR SELECTED EXCITATION OFF REGULATION FAN BLOCK STARTS INLET GUIDE VANE CONTROL TROUBLE TRIP

The I.G.V. position is not correct. Adjustment of the hydraulic jack. Problem of the setting values.

LUBE OIL HEADER TEMPERATURE SNSR FLT: TRIP

The 3 thermocouple are faulty Temperature of lube oil is too high. Shutdown TG

For information Check the I.G.V. control system. Check the proper operation and the setting values of the LVDT 96 TV_1 and 2. Check the adjustment of the hydraulic jack. Refer to the control specifications. Check the lube oil skid (exhauster, heater, pump). Check proper operation of thermocouple LTTH1/LTTH2/LTTH3.

Breakers failure, wire lost, timer failure

Check power supply, wiring, breakers, timer in M.C.C

Breakers failure, wire lost, timer failure

Check power supply, wiring, breakers, timer in M.C.C

88QA fault

Check 88QA Check 88QE Check electrical circuit

L4QETRPZ_ALM

DC PUMP FIRST STEP TIMER FAILURE DC PUMP SCND STEP TIMER FAILURE AC PUMP FAILURE TRIP

L4QETST_ALM

DC PUMP TEST FAILED

L4QESTP1_ALM L4QESTP2_ALM

OMMO_5_9E_E0858_EN_V3

88QE fault

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Date : 10/2011 Page :29/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L4TK_WW_ALM

EXHAUST FRAME BLOWER FAULT. WATER WASH INHIBITED

Exhaust frame blower fault. Impossible to wash TG.

L51QE_ALM

EMERGENCY LUBE OIL OVERLOAD

The emergency lube oil pump is faulty.

L51QEFLT_ALM

DC PUMP ABNORMAL POWER EMERGENCY LUBE OIL PUMP OUT OF SERVICE ATOMIZING AIR BOOSTER MCC CONTACT POSITION ALARM

See alarm : L51QE_ALM

Check the operation of the motors 88 TK_1 and _2. Inspect cooling airflow passages. Check the suction silencers. Check the pressure switches 63 TK _1,2. Check the time over current relay 51 QE. Check the mechanical status of the pump. Check supply of the motor pump. See alarm : L51QE_ALM

See alarm : L51QE_ALM

See alarm : L51QE_ALM

Atomizing air booster Command trouble

Check Atomizing air booster power supply in MCC

Something is blocking the fan Motor overload Short circuit Motor fault

Check that nothing is blocking the fan Check the fan can run in good conditions Check electrical circuit Check motor Determine the breaker, which is open, and find the reason of its position (overload, fuses fault, defected motor, mechanical problem of the motor or the fan, supply, etc.). Correct cause of problem and close breaker.

L51QEOFF_ALM L52AB_ALM

L52BT_ALM

TURBINE COMPARTMENT VENT. FAULT

L52FC1_ALM

COOLING WATER FANS PERMANENT Breaker opened by operator or tripped by high motor BLOCK FDBCK FAULT temperature.

L52FC2_ALM L52FDY_ALM L52FM_ALM

L52G1_ALM

L52HA11_ALM L52HA30_ALM

COOLING WATER FANS REGULATOR See alarm : L52FC1_ALM BLOCK FDBCK FAULT FUEL FORWARDING MOTOR The remote breaker is detected open BREAKER OPEN FLOW DIVIDER STARTUP MOTOR Flow divider startup motor breaker fault BREAKER FAULT

GENERATOR BREAKER TRIPPED

GAS COMPARTMENT HEATER BREAKER FAULT AUXILIARY COMPARTMENT HEATER BREAKER FAULT

OMMO_5_9E_E0858_EN_V3

ACTIONS TO BE TAKEN

See alarm : L52FC1_ALM Determine the cause of this trouble and repair. Check flow divider startup motor breaker

Generator breaker has been tripped by an automatic protective device or manually.

Determine device that tripped the breaker. The problem should be corrected before coupling again. NOTE: For a new coupling, one must give a new start order for proper operation of synchronizing sequence.

Discrepancy between start order and feedback

Check feedback match with heater status

Discrepancy between start order and feedback

Check feedback match with heater status

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L52HQ1_ALM

HYDRAULIC SUPPLY AUXILIARY PUMP DISCREPANCY

Motor, pump fault Motor supply fault. Oil leakage on HP circuit.

Check for leakage. Check the mechanical status of the motor and the pump. Check the motor supply (fuses, breaker, connection) Check the proper operation of : _ the pressure switch 63 HQ_1. _ the pressure transmitter 96 HQ_1. _ the overload relays 49 HQ_1 and 2. Check the status of the filter (an alarm must appear).

L52HT30_ALM

TURBINE COMPARTMENT HEATER BREAKER FAULT

Discrepancy between start order and feedback

Checks feedback match with heater status

L52JS_ALM

HEAT VENT WI COMPARTMENT VENT. FAULT

Something is blocking the fan Motor overload Short circuit Motor fault

Check fuses, breakers, protections, and supply. Check the mechanical status of the fan and the motor in trouble. Check the proper operation of the water injection fan motor 88JS. After doing corrective action, close the breaker in trouble.

L52MCBALM_ALM

DEFAULTS FUSIBLES UNDERVOLTAGE RELAY

Customer signal

Specific customer

L52QA_ALM

AUXILIARY LUBE OIL PUMP MOTOR RUNNING

The main lube oil pump is supplying insufficient lube oil pressure due to pump failure or leaks.

Examine main lube pump. Check pump output and main lube filters for leaks or plugging. Check proper operation of pressure switch 63 QA.

L52QB_ALM

GENERATOR LIFT STANDBY BEAR LIFT OIL PMP RUNN

Lube oil pump ready or running

For information

L52TG_ALM

TURNING GEAR MOTOR TROUBLE

The turning gear motor is not running during the turning gear sequence.

EXHAUST FRAME BLOWER #1 DISCREPENCY EXHAUST FRAME BLOWER #2 DISCREPENCY

Blower is running while there is no run signal Blower is not running while there is run signal Blower is running while there is no run signal Blower is not running while there is run signal

LOAD COMP. COOLING FAN MOTOR TROUBLE

The load compartment cooling fan motor is not running.

L52TK1_ALM L52TK2_ALM L52VG_ALM

OMMO_5_9E_E0858_EN_V3

All right reserved Copyright Revision : A

Check the turning gear motor drawer 88 TG (fuses, breaker, relay, power supply). Check the AC supply power. Check 88TK1 Check electrical circuit Check 88TK2 Check electrical circuit Check the power supply of the motor drawer in the T.C.C. Check the relay. Determine the trouble and repair as soon as possible.

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

L52VL_ALM

HEAT VENT DLN COMPARTMENT VENT. FAULT

L52WCY_ALM

POSSIBLES CAUSES The second fan motor starts (88VL_1 or 2). One of the two fan is in trouble One of the two motors is in trouble 88VL_1 or 88VL_2. Motor supply fault. Water pump breaker open Pump is running while there is no run signal Pump is not running while there is run signal

ACTIONS TO BE TAKEN Check the electrical status of the motor. Check the motor supply (breaker, fuses, connection). Check the fan in trouble.

Bad over-speed configuration trip

Change the over-speed configuration trip with the toolbox

L5CMPST_TRP

WATER PUMP BREACKER OPEN WATER INJECTION PUMP DISCREPENCY VPRO - OS SETPOINT CONFIG ERROR TRIP VPRO - COMPOSITE TRIP(S)

One or more module of one VPRO card fault

L5E_ALM

MANUAL TRIP _ LOCAL

The emergency stop pushbutton has been pressed.

Check modules on each VPRO cards Correct abnormality that caused the operator to push the emergency stop pushbutton.

L5ESTOP1_ALM

E-STOP 1 PROTECTIVE CIRCUIT LATCHED

Emergency stop by protective circuit.

L52WN1_ALM L5CFG_TRP_AL

L5ESTOP1_FZA

L5PPRO_LATCH L60BOG_ALM L60FSRG_ALM L60TRF_ALM L62CD_ALM

VPRO - EMERGENCY STOP PB DEPRESSED

Someone has depressed the emergency stop pb

PROTECTIVE PPRO CARD TRIP Diagnostic alarm on the dedicated card PPRO LATCH Defaut communication TURBINE STARTUP BOGGED DOWN Problems during startup TRIP Manual FSR control has not been reset to a position where FSR GAG NOT AT MAX LIMIT it will not interfere with automatic FSR control. REGULATION IN FSR TEMPERATURE The regulation is in FSR temperature control. CONTROL The cool-down sequence has been interrupted before the COOLDOWN SEQUENCE RUNNING end of normal cycle.

L62LV_ALM

WATER WASH NEEDED

Water wash needed after 15 operating with crude oil.

L62TT2_ALM

FAILURE TO START

The master protective logic signal ‘’L4’’ has tripped the unit twice or if the unit is operating in remote, flame was not established after two tries at establishing flame.

OMMO_5_9E_E0858_EN_V3

All right reserved Copyright Revision : A

Close water pump breaker Check 88TK3 Check electrical circuit

Correct abnormality that caused the emergency stop Check that the problem for witch the emergency stop pb was pressed is resolved WARNING NEVER DEPRESS THE EMERGENCY STOP PB BEFORE TO BE SURE THE PROBLEM IS RESOLVED Check Diagnostic alarm relating to the card mentioned by using the toolbox. Check trip diagram on HMI Refer to specific alarm(s) Raise the manual FSR control to maximum. Check the regulation system CPD. Continue cool-down sequence except in the case of major problem. Water wash has to be done, and then operation with crude oil is authorized. Check all signals going making up the ‘’L4’’ logic signal to determine which caused the problem or determine cause of lack of flame establishment.

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L62WWY_ALM

VENT AFTER AN OFF LINE WASHING INTERRUPTED

Vent after an off line washing interrupted

Refer to specific chapter

L63AD4L_ALM

ATOMIZING AIR DIFFERENTIAL PRESSURE LOW

Atomizing air compressor not providing adequate pressure. Normal shutdown. Lack of air at the upstream of the compressor. Compressor fault (CA1_1 or 2). Step-up gear fault. Motor fault (88 AK_1 or 2).

L63ADL_ALM

ATOMIZING AIR DIFF. PRESSURE LOW

Atomizing air compressor not providing adequate pressure.

L63ADLA_ALM

ATOMIZING AIR DIFFERENTIAL PRESSURE LOW

The discharge pressure of the atomizing air H.P. compressor is too low.

L63BWL_ALM

SKID WASHING PRESSURE OR FLOW FAULT

Skid washing pressure or flow fault

L63CA1L_ALM

INLET AIR FILTER COMPRESSED AIR PRESS LOW ALARM

Air filter compressor pressure low.

L63CPDL_ALM

CPD PRESSURE LOW ALARM

CPD pressure low alarm

OMMO_5_9E_E0858_EN_V3

All right reserved Copyright Revision : A

Check atomizing air system. Check the valves .are correctly positioned. Check for leakage. Check the status (mechanical and electrical) of the compressors and the step-up gears. Check motor. Check the check valves before step-up gears. Check the proper operation of the pressure switches 63 AD_1, 2 and their setting point. Check the proper operation of the transmitter 96AD_1. Check atomizing air system. Check on running gear if the shaft driver atomizing air compressor is running: if coupling broken replace the atomizing air compressor before starting up the limit. If atomizing air compressor is correct, check compressor during operation (vibration) and the circuit (help with the pressure indicators). Check the pressure switches 63AD and their setting point. Check the atomizing air H.P. compressor. Check the atomizing air piping. Check the pressure switch 63 AD_1. Check washing skid Check the cleanliness of the air filter. Check the proper operation of the pressure switch 63 CA_1. NOTE: Refer to Manufacturer’s recommendations for air filters maintenance in specific volumes. Check GT compressor system

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L63CSH_ALM

COMPRESSOR INLET DIFF PRESSURE HIGH TRIP

Inlet filter dirty.

L63CSH_SENSR

TURBINE COMPRESSOR INLET PRESS. SW. TROUBLE

The pressure switches of the air inlet compressor are in trouble.

L63CSHH_ALM

COMPRESSOR INLET DIFF PRESSURE HIGH TRIP

Inlet filter dirty.

VANADIUM INHIBITOR FLOW CHECKING FUEL FWD PUMP DISCHARGE PRESSURE LOW FUEL FORWARDING PRESS. HIGH ALARM HEAT VENT 63FG-1 SENSOR TROUBLE HEAT VENT 63FG-2 SENSOR TROUBLE

The pressure of the fuel additive is high Pressure switch fault

GAS FUEL PRESSURE LOW

Gas fuel pressure to turbine has been sensed as low.

L63FLZ_ALM

LIQUID FUEL PRESSURE LOW

Inlet liquid fuel pressure is low. Pressure switch 63 FL_2 trouble (see control specifications for the setting value). Strainer, filter, pumps fault. Leakage.

L63FU1L_ALM

HEAVY FUEL OIL LOW PRESSURE AT The pressure of the heavy fuel is too low, and the unit PUMP DISCHARGE transfers automatically to distillate fuel.

L63FAH_ALM L63FD1L_ALM L63FD2H_ALM L63FG1_ALM L63FG2_ALM L63FGL_ALM

OMMO_5_9E_E0858_EN_V3

The pressure on the fuel-forwarding skid is low. The pressure on the fuel-forwarding skid is high.

ACTIONS TO BE TAKEN Check the filter status. Change it, if necessary. Check the differential pressure switches 63 CS (operation and setting point). NOTE: Refer to specific volumes for Air filter maintenance. Check the state of the pressure switches 63 CS_1 and _2 (proper operation and setting point). Check their logic circuit. Check the filter status. Change it, if necessary. Check the differential pressure switches 63 CS (operation and setting point). NOTE: Refer to specific volumes for Air filter maintenance. Check the inhibition skid Check the forwarding skid. Check the pressure switch Check the forwarding skid. Check the pressure switch 63 FD_2.

Heat vent 63FG-1 sensor trouble

Check heat vent 63FG-1 sensor

Heat vent 63FG-2 sensor trouble

Check heat vent 63FG-2 sensor

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Check cause of low supply pressure: check the gas fuel pressure supply, the strainer and the pressure switch 63 FG_3. Check the fuel-forwarding skid (pumps, motors, filters). Check the pressure switch 63 FL_2 (operation and setting). Check the strainer filter at the turbine inlet. Check for leakage. Check the piping for leak. Check the pressure switch Check the heavy fuel forwarding system.

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Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L63FU2LA_ALM

HEAVY FUEL PRESSURE LOW

The pressure of the heavy fuel is too low, and the unit transfers automatically to distillate fuel.

L63FU3HZ_ALM

NAPHTA PRESSURE HIGH

Forwarding skid in trouble. Pressure switch faulty.

L63GSD1H_ALM L63GSD2H_ALM

GAS FUEL SCRUBBER GAS 101FI DIFF PRESS HIGH GAS FUEL SCRUBBER GAS 121FI DIFF PRESS HIGH

Check the piping for leak. Check the pressure switch 63 FU_2. Check the heavy fuel forwarding system. Check the forwarding skid. Check the proper operation of the pressure switch 63 FU_3.

Gas scrubber filter/sep 101FI DIF is clogged

Clean gas scrubber filter/sep 101FI DIF

Gas scrubber filter/sep 121FI DIF is clogged

Clean gas scrubber filter/sep 121FI DIF

L63HF1H_ALM

HYDR. FILTER DIFF. PRESSURE HIGH

The hydraulic oil filter is dirty.

L63HQ1L_ALM

HYDRAULIC SUPPLY PRESSURE LOW

Hydraulic supply pressure is low.

L63LF2H_ALM

LIQUID FUEL FILTER DIFF. PRESS. HIGH

The differential pressure too high at the fuel oil filter.

L63LF30H_ALM

CRUDE OIL FILTER CLOGGED

Crude oil filter clogged

L63LF3H_ALM

FUEL FILTER DIFF. PRESSURE HIGH

The filter of the fuel skid is dirty.

L63LF7H_ALM

LIQUID FUEL FILTER DIFF PRESS HIGH

The filter of the fuel skid is dirty.

OMMO_5_9E_E0858_EN_V3

ACTIONS TO BE TAKEN

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Check hydraulic pressure with the pressure gauge. Changeovers the hydraulic oil filters and replaces it if necessary. Check the pressure switch 63 HF. Check the closing of test valve. Check hydraulic supply pressure filter and differential pressure gauge, regulating valve or, pump or proper operation of pressure switch 63 HQ_1. Check the closing of the test valves. Check the filter status. Check for leakage. Inspect fuel oil filters and correct condition. Check proper operation of fuel oil filter differential pressure switch (operation and setting point) 63 LF_1. Change or repair if necessary. Check the closing of the test valve. Check filter Clean or change the filter Check the filter and changeover, if necessary. Check the differential pressure switch 63 LF_3. Check the filter and changeover, if necessary. Check the differential pressure switch 63 LF_3.

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Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L63PGFT_ALM

GAS FUEL NOZ. PURGE SYSTEM PRESSURE HIGH

The two purge valves VA 13_1 and VA 13_2 are seen closed and the pressure switch 63 PG_1 has detected a high pressure.

Check the position of the purge valves VA 13_1 and VA 13_2. Check the limit switches 33 PG_1 and 33 PG_3 (proper operation). Check the pressure switch 63 PG_1.

L63PLLZ_ALM

LIQUID FUEL PURGE LOW AIR PRESS

The liquid fuel air purge pressure is low.

Check the pressure switch 63PL-21.

L63QA2L_ALM

LUBE OIL PRESSURE ALARM BEARING

Lube system leaks or pump or transmitter trouble.

L63QBLY_ALM

GEN BRG LIFT LOW PRESS AT PUMPS OUTLET

Lift pump fault Motor fault Pressure switch fault

L63QQ10H_ALM

LUBE OIL MIST FILTER - DIFF. PRESS Clogged filter. - HIGH

L63QQ1H_ALM

MAIN LUBE OIL FILTER DIFF. PRESSURE HIGH

L63QQ8H_ALM L63QT_ALM L63QT_SENSR

TRIP OIL FILTER DIFF. PRESSURE HIGH TURBINE LUBE OIL HEADER PRESS LOW TRIP LUBE OIL PRESSURE SWITCH TROUBLE

OMMO_5_9E_E0858_EN_V3

Repair leaks or pump. Check proper operation of the transmitter (96QA_2) and the pressure switch 63 QA-2. Check the closing of the test valves. Check the proper operation of the bearing lift pump Check the motor supply (fuses, breaker, connection) Check for leakage Check the proper operation of the pressure switch 63QB (operation and setting point)

88QA fault 88QE fault

Loss of fluid pressure and deterioration of fluid purity may result. Change filter. Check the pressure switch 63QQ_1. Loss of fluid pressure and deterioration of fluid purity may result. Change filter. Check the pressure switch 63QQ_1. Check the lube oil filter. Check the pressure switch 63QQ_8. Check 88QA Check 88QE

Bad signal from lube oil pressure switch.

Check pressure switches 63QT_2A, 2B and 63QA.

Clogged filter.

The lube oil filter is dirty.

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L63QTX_ALM

TURBINE LUBE OIL HEADER PRESS LOW TRIP

Lube oil pressure has fallen below the trip level.

L63TF10H_ALM

FLOW INLET FILTER DIFF PRESSURE

Inlet filter excessive pressure drop. Filter is dirty.

L63TF1H_ALM L63TFH_ALM L63TFH10_ALM

TURBINE AIR INLET DIFF. PRESS. ALARM INLET FILTER PRESSURE DROOP TRIP ALARM INLET FILTER PRESSURE DROOP TRIP ALARM

Check the proper operation of the pressure-regulating valve VPR_2. Check the proper operation of the lube oil pumps. Check for leakage. Check the pressure switch 63 QT_2A. Check the proper operation of the transmitter 96QA_2 Determine cause and correct before restarting unit. Check the pressure drop. If the pressure is excessive, change the air filters. If the pressure is correct, check the pressure switch 63 TF and its setting point. NOTE: Refer to Manufacturer’s recommendations for air filters maintenance in specific chapters.

See alarm : L63TF10H_ALM

See alarm : L63TF10H_ALM

See alarm : L63TF10H_ALM

See alarm : L63TF10H_ALM

See alarm : L63TF10H_ALM

See alarm : L63TF10H_ALM

L63TK_ALM

EXHAUST FRAME COOLING AIR PRESSURE LOW

Exhaust frame blower motor not operating. Air passages blocked.

L63TKY_ALM

EXHAUST FRAME PRESSURE LOW

Exhaust frame pressure low.

L63VGH_ALM

LOAD COMP INLET FILTER CLOGGED - BY PASS OPEN

Heat vent load compartment inlet air filter clogged

L63WC1L_ALM

COOLING WATER PUMP DISCH PRESSURE LOW.

The pressure of cooling water pump is low.

L63WN3H_ALM

WATER INJECTION FILTER DIFF PRESS HIGH

The water filter is dirty.

OMMO_5_9E_E0858_EN_V3

ACTIONS TO BE TAKEN

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Check the operation of the motors 88 TK_1 and _2. Inspect cooling airflow passages. Check the suction silencers. Check the pressure switches 63 TK _1,2. Check the operation of the motors 88 TK_1 and _2. Check the suction silencers. Check the pressure switches 63 TK _1,2. Clean heat vent load compartment inlet air filter#2 Check the pumps and motor. Check leakage. Check the status of the filters. Check the differential pressure, clean the filter or change it if necessary. Check the pressure switch 63 WN3.

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Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L64D_ALM

BATTERY 125 VDC GROUND

Insulation failure has resulted in a ground on the 125 VDC system.

L71CBL1_ALM L71CBL2_ALM L71CBL4_ALM

CO2 GAS LOSS ZONE1 CO2 GAS LOSS ZONE2 CO2 GAS LOSS ZONE3

The CO2 bottles are empty The CO2 bottles are empty The CO2 bottles are empty

L71FA1L_ALM

FUEL ADDITIVE STORAGE TANKLEVEL LOW

The level of the fuel additive storage tank is low.

L71FA1LX_ALM L71FA2L_ALM L71FF2T_ALM L71FF2T_SNSR L71FF4L_ALM L71GS12A_ALM L71GS12B_ALM L71GS13_ALM

CRUDE OIL FWD ADDITIVE STORAGE TANK- LEVEL LOW CRUDE OIL ADDITIVE SKID TANKFAULT LIQUID FUEL HIGH LEAKAGE ON SKID - TRIP LIQUID FUEL LEAKAGE SNSRS FAULT ON LIQUID SKID LIQUID FUEL LOW LEAKAGE LEVEL ON SKID GAS FUEL SCRUBBER 101FI-2A LEVEL HIGH GAS FUEL SCRUBBER 101FI-2B LEVEL HIGH GAS FUEL SCRUBBER 101FI-3 LEVEL HIGH

OMMO_5_9E_E0858_EN_V3

ACTIONS TO BE TAKEN Immediate action should be taken to locate ground and to repair, because if a second ground occurs, this can result in severe damage to the wiring and to the battery. As soon as possible, shut down the unit and check the 125 VDC power. Isolate ground and remove from system. Check the DC motors and all circuits supplied with dc voltage. CAUTION: During this repair, the generator and the starting engine breakers must be opened for safety. Change the CO2 bottles Change the CO2 bottles Change the CO2 bottles Check the level in the tank. Check the level indicator 71 FA_1. Check for leaks. Check pipes.

The level of the crude oil FWD additive storage tank is low.

Additive tank

The crude oil additive skid tank is fault.

Check the tank.

Liquid fuel low leakage level on GT frame

Check for leakage

Liquid fuel low leakage level on GT frame Sensors fault

Check for leakage Check sensors

Liquid fuel low leakage level on GT frame

Check for leakage

Condensate to high in gas separator

Purge gas separator

Condensate to high in gas separator

Purge gas separator

Condensate to high in gas separator

Purge gas separator

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Date : 10/2011 Page :38/52

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Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME L71GS1H_ALM L71GS1HT_SNS L71GS22A_ALM L71GS22B_ALM L71GS23_ALM L71GS2H_ALM L71GS2HT_SNS L71GSHHT L71GSHHT_ALM

L71QH_ALM

ALARM TEXT GAS FUEL COALESC FILTER #1 LEVEL HIGH GAS FUEL #1 COALESC FILTER LEVEL SENSOR TROUBLE GAS FUEL SCRUBBER 121FI-2A LEVEL HIGH GAS FUEL SCRUBBER 121FI-2B LEVEL HIGH GAS FUEL SCRUBBER 121FI-3 LEVEL HIGH GAS FUEL COALESC FILTER #2 LEVEL HIGH GAS FUEL #2 COALESC FILTER LEVEL SENSOR TROUBLE GAS FUEL SEPARATOR CONDENSATE VERY HIGH LEVEL TRIP GAS FUEL SEPARATOR CONDENSATE VERY HIGH LEVEL

LUBE OIL LEVEL HIGH

OMMO_5_9E_E0858_EN_V3

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

Gas fuel coalesc filter #1 is clogged

Clean gas fuel coalesc filter #1

Gas fuel #1 coalesc filter level sensor trouble

Check gas fuel #1 coalesc filter level sensor

Condensate to high in gas separator

Purge gas separator

Condensate to high in gas separator

Purge gas separator

Condensate to high in gas separator

Purge gas separator

Gas fuel coalesc filter #2 is clogged

Clean gas fuel coalesc filter #2

Gas fuel #2 coalesc filter level sensor trouble

Check gas fuel #2 coalesc filter level sensor

Condensate to high in gas separator

Purge gas separator

Condensate to high in gas separator

Purge gas separator

High lube oil tank level or some liquid is coming in the tank.

Check proper operation of the tank level 71QH_1. Investigate cause of high-level alarm and restore normal level. NOTE: Stop the unit if there is some other fluid with the lube oil (water or liquid fuel). In this case, never restart the unit before repair.

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Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN Check proper operation of the level 96QL_1. Checks lube oil system for possible leakage or for excessive consumption. Check the transmitters 96QL-1. Repair and restore normal level with proper oil (see piping schematics for oil level reference and lube oil recommendations). NOTE: In these units, oil consumption is normal so, refilling is necessary periodically with proper oil. Check the level of water-cooling. Check the water-cooling system. Check the bottom of the generator package to define the leaks if there is any leak. Check the indicator switch.

L71QL_ALM

LUBE OIL LEVEL LOW

Lube oil tank level low.

L71WG1_ALM

GENERATOR LIQUID LEVEL DETECTOR

A leak of the water-cooling system, or a leak of oil, is detected.

L71WG2_ALM

GENERATOR LIQUID LEVEL DETECTOR 2# NDE

See alarm : L71WG1_ALM

See alarm : L71WG1_ALM

Cooling water tank level low.

The alarm will actuate when the cooling water tank level drops below a minimum level (see piping schematics). Repair leaks, and add properly treated water. Check for proper operation of level indicator 71WL. NOTE: If there is some water in the lube oil tank, one must stop the unit.

Sump tank high level

Empty sump tank

Sump tank very high level

Check limit switch and pump system

Sump tank low level

Check limit switch and pump system

Electrical fault on the emergency lube oil pump motor

Check the emergency lube oil pump and motor.

L71WL_ALM

L71WS1_ALM L71WS3_ALM L71WS4_ALM L72QE_ALM

COOLING WATER LEVEL LOW

SUMP TANK HIGH LEVEL LIMIT SWITCH SUMP TANK HIGH HIGH LEVEL SUMP TANK LOW LEVEL LIMIT SWITCH EMERGENGY LUBE OIL PUMP MOTOR ELECTRICAL FAULT

OMMO_5_9E_E0858_EN_V3

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L72QETST_ALM

DC PUMP DID NOT START

Loss of DC power to aux lube oil pumps. Oil leakages. Motors fault Pumps fault. Sensor fault.

L72QEZ_ALM

EMERGENCY LUBE PUMP MOTOR RUNNING

The main pump driven accessory gear and AC powered lube oil pump have not supplied sufficient lube oil pressure because of pump failure or leaks.

Determine cause of DC power loss. Refer to the specific alarms about electrical faults signaled. Check the motors (88QE). Check the oil pumps. Check the status of the transmitter (63QE). Check for leaks and pump malfunction. Check proper operation of pressure switches 63 QL, 63 QT_2A and 63 QT_2B.

The batteries compartment temperature is high.

Check heating and ventilation system.

The batteries compartment temperature is low.

Check heating and ventilation system.

The control compartment temperature is high.

Check heating and ventilation system.

The control compartment temperature is high.

Check heating and ventilation system.

Compressor bleed valves have not operated properly. They are in the wrong position or required an excessive amount of time to move from one position to the other.

Investigate problem. The problem should be corrected before restarting. The Master reset switch must be pressed before restarting. Check proper operation of the solenoid valve 20 CB. Check the control air supply of VA 2_1, 2_2, 2_3, 2_4 valves and the opening of the isolating valve. Check the cleanliness of the air separator. Check the limit switches 33 CB.

Over-speed trip being checked.

See ‘’Over-speed trip checks’’ module 10 of this chapter.

Remote breaker opening detected

For information

L74BATH_ALM L74BATL_ALM L74HL_ALM L74HT_ALM

L83CBLIMIT

L83HOST_ALM L83RBO_ALM L83WW_ALM L83WWON_ALM L86ARS_ALM

BATTERIES COMPARTMENT TEMPERATURE HIGH BATTERIES COMPARTMENT TEMPERATURE LOW CONTROL COMPARTMENT TEMP LOW CONTROL COMPARTMENT TEMPERATURE HIGH

COMP BLD VLV FAIL TO CLOSE LIMITED

OVERSPEED TEST MODE SELECTED _ HP REMOTE BREAKER OPENING DETECTED WASHING ON-LINE PROHIB.INLET TEMP.LOW 24H DELAY NECESSARY SINCE THE LAST WW AC TRANSFER FAULT

OMMO_5_9E_E0858_EN_V3

ACTIONS TO BE TAKEN

The on-line water wash is inhibited because the temperature The on-line water wash will be possible as soon as the is low. temperature will be in the limit spread. 24 hours necessary since the last water wash.

Wait the period of 24H to start again on-line washing.

A512-40G1 loss of excitation (A)

Check exciter cubicle

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Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L86BTTEST_AL

HEAT VENT TURB COMP TEST ABORTED

BT test stopped because of ventilation pressure fault

Check BT or leaks in compartment

L86BTX_ALM

LOSS OF TURBINE COMPARTMENT COOLING FAN

The turbine compartment ventilation is faulty.

L86CBA_ALM

COMPRESSOR BLEED VALVE POSITION TROUBLE

Compressor bleed valves have not operated properly. They are in the wrong position or required an excessive amount of time to move from one position to the other.

L86CBT_ALM L86CPR_FLT

COMPRESSOR BLEED VALVE POSITION TROUBLE TRIP COMP OPERATING LIMIT CONTROL FAULT

See alarm : L86CBA_ALM

See alarm : L86CBA_ALM

Inlet heating control valve fault. Compressor discharge pressure transmitters fault.

Check operation of bleed heat control valve. Check the compressor discharge pressure transmitters. Determine the cause of this fault before attempting a new start. NOTE: The master reset function must be selected before restarting. Check the proper operation of heavy fuel inhibitor pump. Check the tank level. Check the proper operation of heavy fuel inhibitor the pump. Check SRV valve Check regulation constant are the same e as in the A010 Check GCV valve Check regulation constant are the same e as in the A010 Check SRV valve Check regulation constant are the same e as in the A010

L86CRTX_ALM

STARTING MOTOR PROTECTIVE LOCKOUT

The cranking motor protective system has been initiated.

L86FA_ALM

FUEL ADDITIVE CIRCUIT FAULT

Low level of inhibitor tank. Heavy fuel inhibitor pump faulty.

L86FAX_ALM

CRUDE OIL FWD

Crude oil FWD additive pumps fault alarm

L86FPG2HT_A

POST-IGNITION P2 HIGH TRIP

SRV valve to much opened

L86FPG2IH_AL

PRE-IGNITION P2 PRESS HIGH IGN INHIBIT

GCV valve not enough opened

L86FPG2LT_A

POST-IGNITION P2 LOW TRIP

SRV valve not enough opened

L86FS_ALM

LIQ FUEL FALSE START-USE RESET DISPLAY

Liquid fuel false start-use reset display

OMMO_5_9E_E0858_EN_V3

Check the ventilation system of this compartment (power supply, motors, fans, electrical circuit...). Check the position of vent flap. Check the proper operation of the limit switch 33BT Investigate problem. The problem should be corrected before restarting. The Master reset switch must be pressed before restarting. Check proper operation of the solenoid valve 20 CB. Check the control air supply of VA 2_1, 2_2, 2_3, 2_4 valves and the opening of the isolating valve. Check the cleanliness of the air separator. Check the limit switches 33 CB.

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After sequencing reset by 86FSRST_CPB

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME L86FT_ALM L86FUX_ALM L86G1AMON_AL L86G1BMON_AL L86G2AALM_AL L86G2AMON_AL

ALARM TEXT

POSSIBLES CAUSES

HEAVY FUEL TEM. FAULT XFERT LOCKOUT COMPLETE LOSS OF HEAVY FUEL FWD PUMPs 74/86G-1A LOCK OUT RELAY COIL FAULT

The temperature of the heavy fuel is not correct. The transfer is locked. Complete loss of heavy fuel FWD pumps crude oil FWD additive pumps.

74/86G-1B LOCK OUT RELAY COIL FAULT 74/86G-2A LOCK OUT RELAY TRIP 74/86G-2A LOCK OUT RELAY COIL FAULT

L86G2BALM_AL

74/86G-2B LOCK OUT RELAY TRIP

L86G2BMON_AL

74/86G-2B LOCK OUT RELAY COIL FAULT

L86GCVT_ALM

GAS CONTROL VLV NOT FOLLOWING - TRIP

L86GLTA_ALM L86GLTB_ALM L86GSC10T12A L86GSC1T3_AL L86GSC4T6_AL L86GSC7T9_AL

GAS LEAK TEST OF SRV FAILED GAS LEAK TEST OF GCV/VENT FAILED 2/3 GEN STATOR WIND. CENT. TEMP SNSR FLT #10-11-12 2/3 GEN STATOR WINDING CENTER TEMP SNSR FLT #1-2-3 2/3 GEN STATOR WINDING CENTER TEMP SNSR FLT #4-5-6 2/3 GEN STATOR WINDING CENTER TEMP SNSR FLT #7-8-9

OMMO_5_9E_E0858_EN_V3

74/86G-1A lock out relay coil fault Lockout relay 74/86G-1B is faulty. Wiring circuit in GCP sequence Tripping coil of the 52G circuit breaker is faulty. 74/86G-2A lock out relay trip 74/86G-2A lock out relay coil fault The lockout 74/86G-2B relay tripped in the GCP and sent opening order 41E and 52G breakers Lockout relay 74/86G-2B is faulty. Wiring circuit in GCP sequence Tripping coil of the 52G circuit breaker is faulty. Start inhibited + transfer to fuel if running on gas or transfer to gas inhibited. The gas control valve feedback is abnormal. Supply fault. Sensors defected. Valve and servo-valve fault.

ACTIONS TO BE TAKEN Check heavy fuel heating system Check pumps. Check 74/86G-1A Check relay Check 74/86G-2A Check 74/86G-2A Check 74/86G-2B Check relay

Check LVDT, 96 GC_1, 2 (setting value, wiring). Check the calibration of the VGC. Check the proper operation of the servo-valve 65 GC_1.

Gas leak of SRV valve

Check SRV valve

Gas leak of GCV valve or Gas Purge Inter valve

Check GCV valve or Gas Purge Inter valve

Temperature sensor fault 2 of 3 Generator RTDs failure Temperature sensor fault 2 of 3 Generator RTDs failure Temperature sensor fault 2 of 3 Generator RTDs failure Temperature sensor fault 2 of 3 Generator RTDs failure

Decrease the generator load Check RTD and associated connections Decrease the generator load Check RTD and associated connections Decrease the generator load Check RTD and associated connections Decrease the generator load Check RTD and associated connections

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GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L86GVA_ALM

INLET GUIDE VANE CONTROL TROUBLE

The I.G.V. position is not correct. Adjustment of the hydraulic jack. Problem of the setting values.

Check the I.G.V. control system. Check the proper operation and the setting values of the LVDT 96 TV. Check the adjustment of the hydraulic jack.

Discrepancy between start order and feedback

Check feedback match with heater status

L86HEATR_ALM L86JSX_ALM

L86N_ALM

L86N1MON_ALM L86N2MON_ALM L86NX_ALM L86PUR_ALM L86PURC_ALM L86PURT_ALM

COMPARTMENT HEATER OPERATING - PRE IGNITION TRIP LOSS OF W. I. COMPARTMENT VENTILATION

ELECTRICAL TROUBLE NORMAL SHUTDOWN

74/86N-1 LOCK-OUT RELAY COIL FAULT 74/86N-2 LOCK-OUT RELAY COIL FAULT STARTUP CHECK STOP GEN PROTECTION FAILURE SHUTDOWN HEAVY FUEL TG - TRIP HEAVY FUEL PURGE VALVE FAILURE TO OPEN HEAVY FUEL PURGE VALVE FAILURE TO CLOSE

Loss of W.I. Compartment ventilation.

Electrical trouble on the generator with normal shutdown for the unit.

74-86N-1 lock-out relay coil fault

Check 74-86N-1 lock-out relay coil

74-86N-2 lock-out relay coil fault

Check 74-86N-2 lock-out relay coil

The general protection of the generator is defect

Check generator system

GT trip while running with heavy liquid fuel

For information Check the proper operation of the purge valve.

The heavy fuel purge valve failed to open. The heavy fuel purge valve failed to close.

L86PURZ_ALM

HEAVY FUEL PURGE TG TRIP SINCE 1 HOUR

GT tripped since 1 hour and operator heavy purge confirmation not given

L86QE_ALM

DC PUMP ELECTRICAL TROUBLE START INHIBITED

DC pump electrical trouble start inhibited

L86S

AUTO SYNCHRONIZING LOCKOUT

Auto synchronizing self-checking system has detected a synchronizing equipment abnormality.

OMMO_5_9E_E0858_EN_V3

Check fan Check electrical circuit Determine the electrical trouble with the matrix in the protection panel. NOTE: The unit should not be operated until the cause of the problem has been determined and corrected. Refer to specific chapters for more information about generator.

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Check the proper operation of the purge valve. Finish heavy fuel purge sequence Confirm purge Restart gas turbine heavy fuel when purge finished Check DC pump Check electrical circuit Investigate synchronization system to determine exact cause of problem. Refer to the Manufacturer’s documents about the synchronizing system.

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Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L86T1AALM_AL

74/86T-1A LOCK OUT RELAY TRIP

74/86T-1A Lock out relay coil fault

L86T1AMON_AL L86TCI L86TFB_ALM L86TFD_C L86TFD_NOFLOW L86TFD_O L86TFDLOW_AL L86TGT1_ALM L86TGT2_ALM

74/86T-1A LOCK OUT RELAY COIL FAULT COMPRESSOR INLET THERMOCOUPLES DISAGREE EXHAUST THERMOCOUPLES OPEN TRIP FALSE START DRAIN VALVE FAIL TO CLOSE FALSE START DRAIN SYSTEM BLOCKED FALSE START DRAIN VALVE FAILURE TO OPEN FSD VALVE CLOSED AT LOWER PRESS THAN EXPECTED GENERATOR DIFFERENTIAL TRIP CHANNEL 1 GENERATOR DIFFERENTIAL TRIP CHANNEL 2

74/86T-1A Lock out relay coil fault

Check relay Check GCP Check relay Check GCP

Bad thermocouple signal.

Check thermocouples and wiring.

Trip. Excessive number thermocouples fault. Position, connection, short-circuit, cut-off fault.

Check and reconnect thermocouples. Check the connection and the position. Check for short-circuit and cut-off. Check limit switch wiring and good operation. Look for valve bloquage. Look for any foreign object or residual fuel in drain piping. Check valve operation. Check limit switch wiring and good operation. Look for valve bloquage.

Valve stucked or limit switch failure Drain system clogged. Valve stucked or limit switch failure Valve spring damaged

Check valve spring.

Electrical trouble with emergency shutdown. Relay 86G indicate a generator differential. Electrical trouble with emergency shutdown. Relay 86G indicate a generator differential.

The unit should not be operated until the cause of the problem has been determined and corrected. The unit should not be operated until the cause of the problem has been determined and corrected. Investigate problem. The problem should be corrected before restarting. The Master Reset switch must be pressed before restarting. NOTE: Refer to Manufacturer’s documents and to Control specification for proper values.

L86TVA_ALM

POSITION IGV FAULT

L86TXT_ALM

The temperature control system has not limited exhaust temperature within the trip limits. EXHAUST OVERTEMPERATURE TRIP Temperature control system fault. Fuel control system fault. Ventilation system fault.

OMMO_5_9E_E0858_EN_V3

ACTIONS TO BE TAKEN

On start-up, the inlet guide vanes are not closed.

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Check the temperature control loop and the fuel control system. Check the cooling and ventilation system.

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Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

L86VGX_ALM

LOSS OF LOAD GEAR COMPT COOLING FAN

Air fan fault Motor fault Power supply fault

L86VL1_ALM

LOSS OF MCC VOLTAGE - LOSS OF VENTILATION SD

The heat compartment ventilation is faulty.

L86VLTEST_AL L86VLX_ALM

HEAT VENT DLN COMP TEST ABORTED LOSS OF DLN COMPARTMENT VENTILATION

L86WN1_ALM

WATER INJ. SUCTION PRESSURE HIGH LOCKOUT

L86WN2_ALM

WATER INJ. DISCHARGE PRESS. LOW LOCKOUT

L86WN3_ALM

WATER INJ. FLOW HIGH LOCKOUT

L86WN7_ALM

WATER INJECTION LOW FLOW TRIP WATER

L86WW_ALM L86WWTD

OFF LINE COMP WW - USE RESET DISPLAY LOSS OF FALSE START DRAIN TEMPERATURE SENSORS NS

OMMO_5_9E_E0858_EN_V3

ACTIONS TO BE TAKEN Check the load compartment cooling ventilation system Check the supply of motors 88VG Check fuses, breakers and protections Check the mechanical status of the fans and the motors Check the ventilation system of this compartment (power supply, motors, fans, electrical circuit...). Check the position of vent flap. Check the proper operation of the limit switch 33VL

VL test stopped because of ventilation pressure fault

Check VL or leaks in compartment

Fans fault

Check fans

The water injection mode is automatically deselected. The water pressure at the inlet of the water injection skid is too high. Leakage. Dirt strainers. Test valves open. Isolating valves at the inlet pump closed.

Check for leakage. Check the closing of the test valves. Check the status of the strainer. Check the opening of the isolating valve at the inlet pump. Check the pressure switch 63 WN_1 (operation and setting point). Check the opening of isolating valve of water inlet. Check for leakage. Check the pressure. The water injection mode is automatically deselected. Check the proper operation of the pressure switch 63 The water pressure at the outlet of the water injection skid is WN_2. too low. Check the proper operation of the water pump. Check the water injection system. Check the solenoid valve 20 WN. The water injection mode is automatically deselected. Check the flow pickup 77 WN. The injected water flow is higher than the authorized limit. Check the water injection system. Water injection trip. Check the flow pickup 77 WN. Water flow low. Check the limit switch 33 WN_0. Limit switch fault. Check the water injection system. Off line comp WW - use reset display

After sequencing reset by L86WWRST_CPB

TC failure or input card failure

Check input card and check TC integrity

All right reserved Copyright Revision : A

Date : 10/2011 Page :46/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L90TKL_ALM

EXHAUST FRAME COOLING SYS TRBL - UNLOAD

Exhaust frame cooling sys trouble - unload

Check cooling system

L94BLN_ALM

STARTUP CHECK STOP BATTERY CHARGER TROUBLE - SD

The 2 batteries charger AC under voltage. The 2 batteries chargers are faulty.

L94BTL_ALM

HEAT VENT TURBINE COMPARTMENT SB FAN TEST FAILED

The turbine ventilation is faulty. Motor 88BT_1 and 2 fault

L94DP1_ALM L94DP2_ALM L94DP3_ALM L94F1B_ALM L94F2B_ALM L94F4B_ALM L94GLTSD_ALM L94GLTSU_ALM

G60A CRITICAL FAILURE –TRIP G60B CRITICAL FAILURE – TRIP T60A CRITICAL FAILURE – TRIP FIRE PROTEC AUX/TURB/LOAD COMPT CO2 RELEASE FIRE PROTEC BEARING AREA CO2 RELEASE CO2 RELEASED ZONE #4 ALARM SHUTDOWN GAS LEAK TEST FAILED STARTUP GAS LEAK TEST FAILED STARTUP CHECK STOP LOAD TUNNEL TEMP HIGH SD

G60A critical failure trip G60B critical failure trip T60A critical failure trip

Check the 2 batteries charger AC breaker. Check voltage magnitude. Check the proper operation of the batteries charger. Check the ventilation system of this compartment. Check fuses, breakers, protections, and supplies. Check the mechanical status of the fan and the motor in trouble. Check the proper operation of each cooling air fan motor 88BT Check the position of vent flap. Check G60A Check G60B Check T60A

CO2 emission

See alarm : L33CL1_ALM

CO2 emission

See alarm : L33CL1_ALM See alarm : L33CL1_ALM Check for leakage Check for leakage

L94LTTH_ALM

LUBE OIL HEADER TEMPERATURE SNSR FLT: SHUTDOWN

L94LV_ALM

XFER TO DIST WATER WASH NEEDED

CO2 emission Leakage in gas system during shutdown TG Leakage in gas system during startup TG Thermocouple faulty Shutdown TG 2 of the 3 thermocouple are faulty Temperature of lube oil is too high. Shutdown TG Transfer to distillate. Water wash needed after 15 operating with crude oil.

L94PGT_ALM

GAS FUEL NOZ. PURGE SYSTEM TROUBLE TRIP

Inter-valve pressure between VA 13_1 and VA 13_2 is high during start-up: the unit trips.

L94LTH_ALM

OMMO_5_9E_E0858_EN_V3

All right reserved Copyright Revision : A

Check thermocouple ttib1 Check the lube oil skid (exhauster, heater, pump). Check proper operation of thermocouple LTTH1/LTTH2/LTTH3. Water wash has to be done, and then operation with crude oil is authorized. Check the proper operation and position of the purge valve VA 13_2. Check the status of the solenoid valves 20 PG_1 and 20 PG_2. Check the pressure switch 63 PG_1 (operation and setting point).

Date : 10/2011 Page :47/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

L94TC_ALM

TORQUE CONVERTOR DRAIN VALVE TROUBLE ALARM

Check the proper operation of drain valve and solenoid The torque converter drain valve is not actuated in the same valve. time as the solenoid valve (20 TU_1). Check the limit switch 33 TC_1.

L94TFD

FALSE START DRAIN VALVE TURBINE SHUTDOWN

Refer to L86TFD_NOFLOW or L86WWTD

Refer to L86TFD_NOFLOW or L86WWTD

L94VLL_ALM

HEAT VENT DLN COMPARTMENT SB FAN TEST FAILED

The turbine ventilation is faulty. Motor 88VL_1 and 2 fault

Check the ventilation system of this compartment. Check fuses, breakers, protections, and supplies. Check the mechanical status of the fan and the motor in trouble. Check the proper operation of each cooling air fan motor 88VL Check the position of vent flap.

L94VTSG1_ALM

VOLTAGE MEASURE DOWNSTREAM 52G TROUBLE

The mentioned breaker is open. Consequently the MKVI can not receive the voltage measurement (upstream 52G) for the synchronization.

Close the breaker

A issue detected on the fuse or MCB

Inspection of the measurement cable. Replace the fuse

FUSES OR MMCB FAULT FOR SYNC VT'S DOWNSTREAM 52L1&2 Q0xL&T NORMAL STOP PAUSED FOR CBV ACTUATION FIRED SHUTDOWN TOO LONG

Normal stop paused for CBV actuation.

Verify bleed valve circuit and switch position of bleed valve

The fired shutdown is too long

L95BT_ALM

HEAT VENT TURB COMPT AIR INLET FLOW LOW

The turbine ventilation is faulty. Motor 88BT_1 and 2 fault

For information Check the ventilation system of this compartment. Check fuses, breakers, protections, and supplies. Check the mechanical status of the fan and the motor in trouble. Check the proper operation of each cooling air fan motor 88BT Check the position of vent flap.

L95BTL_ALM

HEAT VENT TURB COMPT AIR INLET FLOW VERY LOW

See alarm : L95BT_ALM

L94VTSG2_ALM L94X_S_ALM L94XZ_ALM

OMMO_5_9E_E0858_EN_V3

All right reserved Copyright Revision : A

See alarm : L95BT_ALM

Date : 10/2011 Page :48/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

L95VL_ALM

L95VLL_ALM L96FG1_ALM L96FGDIFF_AL

ALARM TEXT

HEAT VENT DLN COMPT AIR INLET LOW FLOW

HEAT VENT DLN COMPT AIR INLET LOW FLOW CONFIRMED HEAT VENT 96FG-1 SENSOR TROUBLE GAS FUEL PRESS TRANSMITTERS DIFF FAILURE

L96FGH_ALM

GAS FUEL PRESSURE HIGH

L96FGL_ALM

GAS FUEL SUPPLY PRESSURE LOW

L96QV1_ALM

LUBE OIL MIST ELIM HIGH PRESSURE

LAAP4_SENSR LAAP4AFLT_ALM LAAP4BFLT_ALM LAAP4CFLT_ALM LAAP4FLT_T

ATOMIZING AIR AAP4 XDUCER DIFF FAULT HIGH AA MANIFOLD PRESS XDUCER#A OUT OF RANGE AA MANIFOLD PRESS XDUCER#B OUT OF RANGE AA MANIFOLD PRESS XDUCER#C OUT OF RANGE LOSS OF AA MANIFOLD RATIO PROTECTION - TRIP

OMMO_5_9E_E0858_EN_V3

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

The turbine ventilation is faulty. Motor 88VL_1 and 2 fault

Check the ventilation system of this compartment. Check fuses, breakers, protections, and supplies. Check the mechanical status of the fan and the motor in trouble. Check the proper operation of each cooling air fan motor 88VL Check the position of vent flap.

See alarm : L95VL_ALM

See alarm : L95VL_ALM

Heat vent 96FG-1 sensor trouble

Check heat vent 96FG-1 sensor

Gas fuel pressure high. Pressure switch fault. Gas fuel pressure high. Pressure switch fault. Gas fuel pressure to turbine has been sensed as low. Purchaser gas supply fault. Leakage. Wiring, supply fault. Transmitter fault. Lube oil mist eliminator high pressure Leakage. Wiring, supply fault. Transmitter fault. The spread between the air pressure transmitters 96AA4A/B/C is too high. Atomizing air pressure transducer 94AA-4A reading out of range. Atomizing air pressure transducer 94AA-4A reading out of range. Atomizing air pressure transducer 94AA-4A reading out of range. Two atomizing air pressure transducers (96AA-4A/B/C) readings out of range.

Check the gas fuel system. Check the pressure switch 63 FG. Check the gas fuel system. Check the pressure switch 63 FG. Check the cause of low supply pressure. Check the purchaser gas supply. Check for leakage. Check the transmitters 96 FG_1. Check the opening of the shutoff valve.

All right reserved Copyright Revision : A

Check for leakage. Check the transmitters 96 QV_1 Check the mentioned sensors, wirings or calibration. Check the mentioned sensor, wirings or calibration. Check the mentioned sensor, wirings or calibration. Check the mentioned sensor, wirings or calibration. Check the mentioned sensors, check-valves, atomizing air system or compressor.

Date : 10/2011 Page :49/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME LAAP4STCK_ALM LAAPRH1_ALM LAAPRH2_ALM LAAPRH3_ALM LAAPRL1_ALM LAAPRL2_ALM LAAPRL3_ALM LAAPRTRP_ALM LAFPAP_SENSR LCPD_SENSR LCPRERR_ALM LDB_ABRT_ALM LDB_FAIL_ALM LDBMD_ON_ALM LDWATT_ALM LDWCAL_ALM LFAGNBA_A LFALNBA_A LFPG2_SENSR

ALARM TEXT ATOMIZING AIR PRESSURE HIGH – START INHIBITED ATOMIZING AIR PRESS RATIO HIGH ON LIQ FUEL ATOMIZING AIR PRESS RATIO HIGH ON GAS FUEL ATOMIZING AIR PRESS RATIO HIGH ON MIXT FUEL ATOMIZING AIR PRESS RATIO LOW ON LIQ FUEL ATOMIZING AIR PRESS RATIO LOW ON GAS FUEL ATOMIZING AIR PRESS RATIO LOW ON MIXT FUEL ATOMIZING AIR PRESS RATIO LOW LOW TRIP BAROMETRIC PRESSURE TRANSDUCERS DISAGREE COMP DISCHARGE XDUCER DIFF FAULT HIGH COMP OP LIMIT PROTECTION MAX CTRL ERROR UNIT ABORTING DEAD BUS MODE UNIT NOT READY FOR DEAD BUS MODE UNIT READY FOR DEAD BUS MODE MEGAWATT TRANSDUCER SIGNAL TROUBLE GAS FUEL SUPPLY PRESSURE LOW GCV REG AT NULL COMP AUTHORITY LIMIT LCV REG AT NULL COMP AUTHORITY LIMIT INTERVALVE PRESSURE TRANSDUCERS DISAGREE

OMMO_5_9E_E0858_EN_V3

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

Atomizing air pressure too high. Start inhibited

Check atomizing air system.

Atomizing air pressure ratio High on liquid fuel

Check atomizing air system.

Atomizing air pressure ratio High on gas fuel

Check atomizing air system.

Atomizing air pressure ratio High on mixture operation

Check atomizing air system.

Atomizing air pressure ratio Low on liquid fuel

Check atomizing air system, compressor or check-valves.

Atomizing air pressure ratio Low on gas fuel

Check atomizing air system, compressor or check-valves.

Atomizing air pressure ratio low on mixture operation

Check atomizing air system, compressor or check-valves.

Atomizing air pressure ratio very low on liquid fuel.

Check atomizing air system, compressor or check-valves.

One transducer is out

Check transducers

One transducer is out

Check transducers

Inlet heating control valve fault. Compressor discharge pressure transmitters fault. Unit aborting dead bus mode

Check operation of bleed heat control valve. Check the compressor discharge pressure transmitters. Refer to specific chapter.

Unit not ready for dead bus mode Unit ready for dead bus mode

Gas fuel supply pressure low

Dead bus mode permissive Check the power transmitter and change it if its fault Check the electrical circuit Refer to specific chapter

The pressure of the transducer is not correct

Check GCV 1 valve

The pressure of the transducer is not correct

Check GCV 2 valve

Inter-valve pressure transducers disagree

Check transmitter settings

Power transmitter fault

All right reserved Copyright Revision : A

Date : 10/2011 Page :50/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

LFQGUV_ALM

The fuel gas system is in trouble.

Check the fuel gas system and the gas skid.

Flow divider fuel high flow difference

Check flow divider.

For information

Check the regulated constants.

For information

Check the regulated constants.

LPROFILE_ALM

FUEL GAS FLOW OUT OF RANGE FLOW DIVIDER FUEL HIGH FLOW DIFFERENCE SRV OPEN AT 90 % - RISK OF TRIP ON HIGH EXH TEMP SRV VLV OPEN AT 95 % - XFER TO LIQUID FUEL TEMP. COMP LIMIT FSR BACKUP CONTROL ACTIVE GAS FUEL TEMPERATURE TC TROUBLE FREQUENCY OUT OF LIMIT FOR GC TEST. NEED MRST NGC TEST PB ACTIVATED GOV TEST ENABLED - SELECT NGC DISABLED AFTER TEST OVERFREQ OPERATION AT MAX TIME. INSPECTION REQU'D PROFILE TEST PB ACTIVATED

LQEP2N_ALM

DC PUMP ABNORMAL PRESSURE

Motor, pump fault Transducer fault

LQEP2NFLT_ALM

EMERGENCY LO PUMP DISCH PRESS TRANSDUCER FAILURE

4-20mA 96QE-2 fault

LTBRGH_ALM

LUBE OIL TEMP BRG DELTA TEMP HIGH

The delta temperature between turbine bearings fault Turbine bearings fault Lube oil fault Leakage

LTBRGHH_ALM

LUBE OIL TEMP BRG DELTA TEMP HH

See alarm : LTBRGH_ALM

LFQLDIFF_ALM LFSGRH_ALM LFSGRHH_ALM LFSRCPR_ALM LFTG_ALM LGCTESTOF_AL LNGC_ON_ALM LNGCPERM_ALM LOF_LIM_ALM

OMMO_5_9E_E0858_EN_V3

Regulation system fault. Thermocouples fault.

Check the regulation system. Check operation of bleed heat control valve. Check the thermocouples FT_GI_1, 2 and 3 (connection, wiring and operation).

Indication about NGC test

For information

Indication about NGC test

For information

Indication about NGC test

For information

Total operating time in over frequency greater than the allowable limit Indication about profile test

All right reserved Copyright Revision : A

Turbine shutdown for boroscopic inspection recommanded Check the mechanical status of the motor and the pump. Check the motor supply (fuses, breaker, connection) Check transducer Check 4-20mA 96QE-2 transmitter (connections, cables.). Replace transmitter if necessary. Check the lube oil feed and drain piping Check turbine bearings and lube oil system Check thermocouples Check for leakage Check the correct circulation of the lube oil. See alarm : LTBRGH_ALM

Date : 10/2011 Page :51/52

GE Energy

Rev : A OPERATION AND MAINTENANCE MANUAL OPERATION SIGNAL NAME

ALARM TEXT

POSSIBLES CAUSES

ACTIONS TO BE TAKEN

LTGBRGH_ALM

LUBE OIL TEMP GEN BRG DELTA TEMP HIGH

The delta temperature between generator bearings is fault Generator bearings fault Lube oil fault Leakage

Check the lube oil feed and drain piping Check generator bearings and lube oil system Check thermocouples Check for leakage Check the correct circulation of the lube oil.

LTGBRGHH_ALM

LUBE OIL TEMP GEN BRG DELTA TEMP H-H

See alarm : LTGBRGH_ALM

See alarm : LTGBRGH_ALM

LTNHLOSS_ALM

LOSS OF CTRL SPEED SIGNAL START EMERGENCY LO PUMP

No more speed signal detected on the VPRO cards

LTTH1_ALM

LUBE OIL THERMOCOUPLE #1 FAULT Temperature of lube oil is too high.

LTTH2_ALM LTTH3_ALM

LUBE OIL THERMOCOUPLE #2 FAULT LUBE OIL THERMOCOUPLE #3 FAULT INJECTION TO FUEL RATIO LOW 4 MIN AVG. INJECTION TO FUEL RATIO LOW. HOURLY AVG. FALSE START DRAIN TEMPERATURE TC#1 OUT OF RANGE FALSE START DRAIN TEMPERATURE TC#2 OUT OF RANGE

See alarm : LTTH1_ALM See alarm : LTTH1_ALM If ‘’Request injection to fuel ratio’’ is greater than ‘’Actual injection to fuel ratios’’ during four minutes. If ‘’Request injection to fuel ratio’’ signal is greater than ‘’Actual injection to fuel ratio’’ signal during hourly average...

Check the status of the control valve.

TC failure or input card failure

Check input card and check TC integrity

TC failure or input card failure

Check input card and check TC integrity

MANUAL TRIP _ REMOTE

The emergency stop pushbutton has been pressed.

Correct abnormality that caused the operator to push the emergency stop pushbutton.

LWLX4MIN LWLXHR LWWTD1_FLT LWWTD2_FLT R5E_ALM

OMMO_5_9E_E0858_EN_V3

All right reserved Copyright Revision : A

Check pickup system Check electrical circuit Check VPRO cards Check the lube oil skid (exhauster, heater, pump). Check proper operation of thermocouple See alarm : LTTH1_ALM See alarm : LTTH1_ALM

Check the status of the control valve.

Date : 10/2011 Page :52/52