AL Codigos de Falla (2)

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Troubleshooting Electronic Modular Control Panel II+ (EMCP II+) Media Number -RENR2484-05

Publication Date -01/04/2002

Date Updated -19/04/2002 i01367572

AL Fault Code SMCS - 4490-035 Table 1 AL Fault Code Troubleshooting AL Fault Code

Description

Troubleshooting

AL1

High Water Temperature Alarm Coolant temperature increases to within 6°C (11°F) of setpoint P015.

See the Troubleshooting, "Troubleshooting Dedicated Shutdown Indicators".

AL2

Low Engine Coolant Temperature Alarm Coolant temperature decreases to setpoint P016.

See the Troubleshooting, "Troubleshooting Dedicated Shutdown Indicators".

AL3

Low Engine Oil Pressure Alarm

See the Troubleshooting, "Troubleshooting Dedicated Shutdown Indicators".

Oil pressure drops to within 34 kPa (5 psi) of the P013 or P014 setpoint. AL4

Fault Detected By Engine ECM The engine ECM detects an alarm fault or a shutdown fault.

Refer to the appropriate engine troubleshooting service manual.

AL5

Low Engine Coolant Level Fault Coolant level drops below the probe of the coolant loss sensor.

Check level of engine coolant. The level of engine coolant must be above the probe of the sensor. Check for CID 111 faults. Perform the electrical connector inspection test. Refer to the Testing and Adjusting, "Electrical Connector -

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Inspect". AL6

High Engine Oil Temp Fault Oil temperature increases to within 6°C (11°F) of setpoint P026.

Check level of engine coolant. The level of engine coolant must be above the probe of sensor. Check fan belt, etc. Check P026 setpoint.

AL7

Generator Overvoltage Fault Line to line voltages rises above the P102 or P105 setpoints.

Refer to the service manual for the voltage regulator that is being used. Check P101 through P106 setpoints.

AL8

Generator Undervoltage Fault Line to line voltage drops below the P108 or the P111 setpoints.

Refer to the service manual for the voltage regulator that is being used. Check P107 through P112 setpoints. Refer to the engine service manual for the cause of low engine speed. If engine speed is reduced and the engine control switch (ECS) is NOT in STOP, the GSC+ will issue this fault.

AL9

Generator Overfrequency Fault Frequency rises above the P114 or P117 setpoints.

See the Troubleshooting, "Indicator For Engine Overspeed". Check setpoints P113 through P118.

AL10

Generator Underfrequency Fault Refer to the engine service manual for a cause of low engine speed. If engine speed is reduced and the ECS is NOT in Frequency drops below the STOP, the GSC+ will issue this fault. Check setpoints P119 P120 or P123 setpoints. through P124.

AL11

Generator Reverse Power Fault Reverse power rises above the P126 setpoint.

Refer to the engine service manual for a cause of lost engine power. Check setpoints P125 through P127.

AL12

Generator Phase Overcurrent Fault Phase current rises above the P129 or P134 setpoints.

Check for a cause of the overcurrent. Check setpoint P029 and setpoints P128 through P135.

AL13

Generator Total Overcurrent Fault Total current rises above the P131 or P136 setpoints.

Check for a cause of the overcurrent. Check setpoint P029 and setpoints P128 through P137.

AL14

Phase A No Voltage Input Fault Phase A voltage not being received at GSC+ input.

Check for an open circuit on the wire that is connected to the GSC+ connector contact 10. Check for a short on the wire that is connected to the GSC+ connector contact 10. See the Testing And Adjusting, "Schematics and Wiring Diagrams".

AL15

GSC+ Configuration Error Frequency of generator output voltage does not match engine speed.

Check setpoints P009 and P033. Setpoint P009 represents the number of ring gear teeth. Setpoint P033 represents the number of generator poles. Correct the setpoint value, if necessary.

Additional AL Fault Codes (for GSC+P) AL16

Incorrect Phase Sequence The generator and the bus have

Check for the cause of the phase sequence mismatch. Check wiring to the bus transformer box (BTB +) and the AC

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a phase mismatch.

transformer box (ATB +).

AL17

Improper generator or bus voltage The generator voltage or the bus voltage are either too low or the voltages do not match.

1. The generator voltage and the bus voltage must be above 10% of the nameplate voltage in P028 when setpoint P020 is set to 700. Generator voltage and bus voltage must be above 50% of the nameplate voltage in P028 when setpoint P020 is set to any other value than 700. 2. Check Setpoints P303 and P304 in order to determine whether the generator voltage and the bus voltage match within the tolerance that is specified.

AL18

Synchronizer Time-Out The GSC+P is unable to complete automatic synchronization or dead bus paralleling within the time allowed in P314.

Check for cause of synchronization time-out. Ensure that the engine is responding properly to the GSC+P Speed Adjust 1 Output signal. Check for wiring errors. Check setpoints P313 and P314 for proper values. Increase the values, if necessary.

Illustration 1 Upper Display With AL Fault Code AL3 Showing

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AL Fault Codes are shown as "AL1" through "AL15" on the upper display. The fault codes include specific engine fault conditions. An example of a specific engine fault condition is the low engine oil pressure alarm. An example of a protective relaying function is the underfrequency fault. AL fault codes depend on certain setpoints. For more information on setpoints, see the Systems Operation, "Service Mode". AL fault codes are not diagnosed by the GSC+. These codes are not stored in the fault log. Many of the AL fault codes are programmable as a fault alarm or as a fault shutdown. The AL fault codes are accompanied by either the fault alarm indicator or the fault shutdown indicator on the GSC+ in order to show the severity of the fault.

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