Lg Checkpoint Codes
Short Description
Lg Checkpoint Codes air conditioner...
Description
LG
LG Checkpoint-codes Versie 2.4P-M
vervangt U02.3.M
• BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THE SERVICEMANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
1
Hoofdstukindeling Single A (vloer- & plafond UV / cassette UT / kanaal UB)........................................04 - Aan / Uit - Inverter UU..(W) - Variabel (aan/uit)..........................................................................................................26 AT-C.. / AT-H.. / LB-C.. / LB-D.. / LB-G.. / LB-H.. / LT-B.. / LT-C.. / LT-D.. / LT-E.. / LV-B.. / P..AH Multi-split ......................................................................................................................39 - Inverter FM..AH - Variabel (aan/uit)..........................................................................................................92 M..AC/AH
2
- Multi-split tot 2005.......................................................................................................94 A2-C.. / A3-C.. / A2-H.. / A3-H.. / LM.. RAC...............................................................................................................................96 - Standaard wandunit (aan/uit)......................................................................................97 LS-J.. / LS-K.. / LS-L.. / S..ACL / S..ACP / S..AH(P) / G..AH - ART COOL Deluxe / Panel (aan/uit)............................................................................97 LS-P.. / A09AH* / -12- / -18- / C07AH* / -09- / -12- Standaard wandunit Inverter........................................................................................99 LS-N.. / LS-Q.. / LS-R.. / S..AN / S..AW - ART COOL Deluxe Inverter.........................................................................................101 C09AW* / C12AW* - ART COOL Deluxe Inverter.........................................................................................103 C18AW* / C24AW* -ART COOL Panel Inverter............................................................................................105 A09AW* / A12AW* / A09AW1 / A12AW1
3
LG
Single A (vloer- & plafond UV / cassette UT / UB kanaal) UU..(W)
Inverter 1-fase (single-split) Inverter 3-fase (Single-split) Synchro (master/slave) Variabel (aan/uit, single-split)
4
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.6 Check code Trouble shooting CH01, CH02, CH06 Display code
Title
Cause of error
Check point & Normal condition
01
Indoor air sensor
• Connector connection error • Faulty PCB • Faulty sensor (Open / Short)
Normal resistor : 10KΩ/ at 25˚C (Unplugged) Normal voltage : 2.5Vdc / at 25˚C(Plugged) Refer to sensor resistance table.
02
Indoor inlet pipe sensor
• Connector connection error • Faulty PCB • Faulty sensor (Open / Short)
Normal resistor : 5KΩ/ at 25˚C(Unplugged) Normal voltage : 2.5Vdc / at 25˚C(Plugged) Refer to sensor resistance table.
06
Indoor outlet pipe sensor
• Connector connection error Normal resistor : 5KΩ/ at 25˚C(Unplugged) • Faulty PCB Normal voltage : 2.5Vdc / at 25˚C(Plugged) • Faulty sensor (Open / Short) Refer to sensor resistance table.
Check Flow Chart
Unplug the sensor on Indoor unit PCB
Estimate the Voltage of each sensor.
Check the Connector connection
Is the voltage of the sensor 2.5Vdc at 25˚C
No Correct connection
Yes Is it normal ?
No Correct connection
Repair or Change the PCB.
Unplugged
Yes
Plugged
Estimate the resistance of each sensor. Is the resistance of the sensor 10Ω / 5kΩ at 25˚C? Yes
No Correct connection
10kΩ
2.5Vdc
Ω
V
Plug the sensor on Indoor unit PCB
Check the resistance
Check the voltage
LGE Internal Use Only
5
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.7 Check code Trouble shooting CH03 Display code
03
Title
Cause of error
Check point & Normal condition
Communication Error (Wired remote controller)
• Connector connection error • Faulty PCB / Remote controller • Connection wire break
• Connection of wire • Main PCB Volt. DC12V • Noise interference
Check Flow Chart CN-REMO Check the wire connection(Open / Short / Miswirring) Is it normal ? Yes Is the soldering state of connector is normal? Yes
No Correct connection Or change connection wire
No Re-soldering component Or change the PCB
Check the volt. of main PCB power source. (DC 12V,DC 5V) Is it normal ? Yes
Wired R/C
Indoor Unit
S 12V GND (YL) (RD) (BR)
12V S GND (RD) (YL) (BR)
No Correct connection Or change the PCB
12Vdc
12Vdc
V
V
Check the installation of wired remote controller. (Noise interference) Is it normal ?
No Adjust the state of installation
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
Check the Volt.
- 68 -
Check the Volt.
LGE Internal Use Only
6
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.8 Check code Trouble shooting CH04 Display code
Title
04
Drain pump / Float switch
Cause of error • Float switch open. (Normal : short) • Water over flow
Check point & Normal condition • The connection of wire (Drain pump/ Float switch) • Drain pump power input. (220V) • Drain tube installation. • Indoor unit installation. (Inclination)
Check Flow Chart
Check the level of water (Float moves top position) Is it normal ?
CN-Float
No Check Drain Pump
CN-Float
Yes Is the float switch clean ?
No Clean float switch
❊ Drain pump check
Yes
Check the wire connection (Open, Soldered poorly)
Check the wire connection (Open, Soldered poorly)
Is it normal ? Is it normal ? Yes Is the resistance of f loat switch normal (short) ?
No Correct connection Or re-soldering PCB
Yes
No Change the float switch
Is the resistance of Drain Pump? Normal ( about 400Ω ) ?
No Correct connection Or re-soldering PCB
No Change the Drain Pump
Yes Is the drain pump clean ?
No Clean drain pump
Yes Check drain tube installation
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 69 -
LGE Internal Use Only
7
5. Trouble Shooting
Single A: Inverter & Synchro (UU..W & UU72 / 100)
6.9 Check code Trouble shooting CH09, CH10 Display code
Title
09
EEPROM Check sum (Indoor)
10
BLDC motor fan lock (Indoor)
Cause of error
Check point & Normal condition
• Check sum error
• Check the poor soldering. • Change PCB
• Fan motor break down • Fan motor & PCB poor contact • Obstruction to the fan
• Check the indoor fan motor. • Check the connection status between • PCB and fan motor.
Check Flow Chart
Check the indoor fan motor. (Fan is locked by obstruction) Is it normal ?
No Remove obstruction
Yes Check the connection status between PCB and fan motor Is it normal ?
No Correct connection Or re-soldering PCB
Yes Check the DC Motor signal
Is it normal ?
No Change Indoor Motor
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 70 -
LGE Internal Use Only
8
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.10 Check code Trouble shooting CH05, CH53 Display code
05 / 53
Title
Communication (Indoor↔Outdoor)
Cause of error
Check point & Normal condition
• The connector for transmission is disconnected. • The connecting wires are misconnected. • The communication line is break • Outdoor PCB is abnormal. • Indoor PCB is abnormal.
• Check power input AC 230V. (Outdoor, Indoor) • Check connector for transmission • Check wires are misconnecting. • Check transmission circuit of outdoor PCB • Check transmission circuit of indoor PCB
Check Flow Chart
Check the input power AC230V (Outdoor, Indoor unit) Is it normal ? ( 230V ±10% )
Is the connection of GND,GND1,GND2, correctly connected?
No Correct connection
Yes No Needs electric work
Change PCB
Yes Check the communication wires are correctly connected. Is it normal ? Yes Check the resistance between communication line and GND. (Normal : Over 2MΩ) Is it normal ?
No Adjust the connection of wire Confirm the wire of "Live", "Neutral", "Signal"
❊ CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit.
No Correct connection
Yes Is connector for communication correctly connected?
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 71 -
LGE Internal Use Only
9
5. Trouble Shooting
Single A: Inverter & Synchro (UU..W & UU72 / 100)
6.11 Check code Trouble shooting CH21 Display code
21
Title
DC Peak
Cause of error
Check point & Normal condition
• Instant over current • Over Rated current • Poor insulation of IPM
• An instant over current in the U,V,W phase - Comp lock - The abnormal connection of U,V,W • Over load condition - Overcharging of refrigerant - Pipe length. • Poor insulation of compressor
Check Flow Chart
Check the wire connection.(U,V,W)
Is it normal ? Yes
Is it normal ? (1 Ph : 230V ±10% 3 Ph : 400V ±10% ) Yes
No Correct connection
Check DC link capacitor Is it normal? (Refer to belows)
Check the resistance of comp. (No difference at each terminal) Is it normal ? Yes
Yes Check Over load condition - Overcharging of refrigerant - Pipe Length - Condenser is blocked - Outdoor fan is locked
No Change Compressor
Check the electricity leakageof the compressor. (Refer to comp check table) Is it normal ? Yes
No Needs electric work
No Change DC link capacitor Or Main PCB Remove obstruction Change outdoor fan or motor Change refrigerant
No Change Main PCB No Change Compressor
❊ Dc link voltage table Model 1 Phase
Check the input power (Outdoor, Indoor unit)
3 Phase
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
DC Link Voltage Type
Operating DC280V ± 10% DC280V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10%
PFC
DC300V ± 10%
DC380V ± 10%
PSC PFC PFC
DC540V ± 10% DC540V ± 10% DC540V ± 10%
DC500V ± 10% DC680V ± 10% DC680V ± 10%
PFC
DC540V ± 10%
DC680V ± 10%
PSC PSC PFC PFC PFC PFC PFC
AUUW606D AUUW368D AUUW428D AUUW488D AUUW608D
- 72 -
Non operating DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10%
AUUW126C AUUW186C AUUW246D AUUW306D AUUW366D AUUW426D AUUW486D
LGE Internal Use Only
10
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.12 Check code Trouble shooting CH22 Display code
Title
22
Max. C/T
Cause of error
Check point & Normal condition
• Malfunction of compressor • Blocking of pipe • Low voltage input • Refrigerant, pipe length, blocked, …
• Over current
Check Flow Chart
Check the wire connection.(U,V,W)
Is it normal ? Yes
Is it normal ? (1 Ph : 230V ±10% 3 Ph : 400V ±10% ) Yes
No Correct connection
Check DC link capacitor Is it normal? (Refer to belows)
Check the resistance of comp. (No difference at each terminal) Is it normal ? Yes
Yes Check Over load condition - Overcharging of refrigerant - Pipe Length - Condenser is blocked - Outdoor fan is locked
No Change Compressor
Check the electricity leakageof the compressor. (Refer to comp check table) Is it normal ? Yes
No Needs electric work
No Change DC link capacitor Or Main PCB Remove obstruction Change outdoor fan or motor Change refrigerant
No Change Main PCB No Change Compressor
❊ Dc link voltage table Model 1 Phase
Check the input power (Outdoor, Indoor unit)
3 Phase
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
DC Link Voltage Type
Operating
DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10%
DC280V ± 10% DC280V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10%
PFC
DC300V ± 10%
DC380V ± 10%
PSC PFC PFC
DC540V ± 10% DC540V ± 10% DC540V ± 10%
DC500V ± 10% DC680V ± 10% DC680V ± 10%
PFC
DC540V ± 10%
DC680V ± 10%
AUUW126C AUUW186C AUUW246D AUUW306D AUUW366D AUUW426D AUUW486D
PSC PSC PFC PFC PFC PFC PFC
AUUW606D AUUW368D AUUW428D AUUW488D AUUW608D
- 73 -
Non operating
LGE Internal Use Only
11
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.13 Check code Trouble shooting CH40 Title
40
C/T Internal circuit
Cause of error
• Initial current error
Check point & Normal condition
• Malfunction of current detection circuit. (Open / Short) • The voltage of “C01N” Is 4.0Vdc (25A) .
→
Display code
Check Flow Chart
Check the input power AC230V (Outdoor, Indoor unit) TRANS Is it normal ? ( 230V±10%)
No Correct connection
Yes
→
Check “C01N” Is it normal (4.0Vdc )?
C01N No Change Main PCB
Yes Check Check TRANS Is it normal?
No Change TRANS
Yes Change main PCB
V
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 74 -
LGE Internal Use Only
12
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.14 Check code Trouble shooting CH23, CH28 Display code
Title
23
DC Link Low voltage.
• 1ph : DC link volt. is 140Vdc . • 3ph : DC link volt. is 250Vdc .
• Check the power source. • Check the components.
28
DC Link High voltage
• 1ph : DC link volt. is 140Vdc . • 3ph : DC link volt. is 250Vdc .
• Check the power source. • Check the components.
25
Input voltage
• Abnormal Input voltage (140Vac , 300Vac )
• Check the power source. • Check the components.
Cause of error
Check point & Normal condition
→
→
→
→
→
❊ Check DC link voltage
Check Flow Chart
Check the wire connection.(U,V,W)
Is it normal ? Yes Is it normal ? Yes
V
No Correct connection
❊ Check TRANS1
No Change Compressor
CN_TRANS 1
❊ Dc link voltage table Is it normal ? Yes
No Change Compressor
Model 1 Phase
Check the input power
3 Phase
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
DC Link Voltage Type
Operating
DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10%
DC280V ± 10% DC280V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10%
PFC
DC300V ± 10%
DC380V ± 10%
PSC PFC PFC
DC540V ± 10% DC540V ± 10% DC540V ± 10%
DC500V ± 10% DC680V ± 10% DC680V ± 10%
PFC
DC540V ± 10%
DC680V ± 10%
AUUW126C AUUW186C AUUW246D AUUW306D AUUW366D AUUW426D AUUW486D
PSC PSC PFC PFC PFC PFC PFC
AUUW606D AUUW368D AUUW428D AUUW488D AUUW608D
- 75 -
Non operating
LGE Internal Use Only
13
5. Trouble Shooting
Single A: Inverter & Synchro (UU..W & UU72 / 100)
6.15 Check code Trouble shooting CH24 Display code
Title
24
Press S/W Open
Cause of error
Check point & Normal condition
• Check the connection of “CN_PRESS” • Check the SVC V/V open. • Check the leakage of refrigerant.
• Low / High press S/W open.
Check Flow Chart
Is the wire connection normal ?
❊ Pressure switch table No Correct connection
Switch Spec Model
Yes Is the soldering state of connector is normal?
No Re-soldering component
Yes Is the SVC Valve opened ?
Low pressure switch 0.03 Mpa AUUW126C AUUW186C
High pressure switch 4.3 Mpa AUUW246D AUUW306D AUUW366D AUUW426D AUUW486D AUUW606D AUUW368D AUUW428D AUUW488D AUUW608D
No Open SVC Valve
Yes CN_PRESS
Check the leakage of refrigerant. Check Pressure of suction pipe Check Pressure of discharge pipe Is it normal ?
Yes
No Re-vaccuming system & Re-charging
Change main PCB
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 76 -
LGE Internal Use Only
14
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.16 Check code Trouble shooting CH26, CH27 Display code
Title
26
DC Compressor Position
• Compressor position detect error
• Check the connection of comp wire “U,V,W” • Malfunction of compressor • Check the component of “IPM”, detection parts.
27
PSC Fault PFC Fault
• Over current at “IGBT”/PFC module
• Check the component of “IGBT” /PFC module. • Check the components.
Cause of error
Check point & Normal condition
Check Flow Chart
Check the wire connection.(U,V,W)
Is it normal ? Yes
Is it normal ? (1 Ph : 230V ±10% 3 Ph : 400V ±10% ) Yes
No Correct connection
Check DC link capacitor Is it normal? (Refer to belows)
Check the resistance of comp. (No difference at each terminal) Is it normal ? Yes
Yes Check Over load condition - Overcharging of refrigerant - Pipe Length - Condenser is blocked - Outdoor fan is locked
No Change Compressor
Check the electricity leakageof the compressor. (Refer to comp check table) Is it normal ? Yes
No Needs electric work
No Change DC link capacitor Or Main PCB Remove obstruction Change outdoor fan or motor Change refrigerant
No Change Main PCB No Change Compressor
❊ Dc link voltage table Model 1 Phase
Check the input power (Outdoor, Indoor unit)
3 Phase
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
DC Link Voltage Type
Operating
DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10% DC300V ± 10%
DC280V ± 10% DC280V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10% DC380V ± 10%
PFC
DC300V ± 10%
DC380V ± 10%
PSC PFC PFC
DC540V ± 10% DC540V ± 10% DC540V ± 10%
DC500V ± 10% DC680V ± 10% DC680V ± 10%
PFC
DC540V ± 10%
DC680V ± 10%
AUUW126C AUUW186C AUUW246D AUUW306D AUUW366D AUUW426D AUUW486D
PSC PSC PFC PFC PFC PFC PFC
AUUW606D AUUW368D AUUW428D AUUW488D AUUW608D
- 77 -
Non operating
LGE Internal Use Only
15
4. Trouble Shooting Display code
29
Single A: Inverter & Synchro (UU..W & UU72 / 100)
Title
Inverter compressor over current
Cause of error
Check point & Normal condition
1. Overload operation (Pipe clogging/Covering/EEV defect/Ref. overcharge) Inverter compressor input 2. Compressor damage(Insulation damage/Motor current is over 30A damage) 3. Input voltage low 4. ODU inverter PCB assembly damage
■ Error Diagnosis and Countermeasure Flow Chart Is installation condition normal?
No
Yes Are the resistance Between each phase and insulation resistance of Inverter compressor normal?
No
1. Check Pipe clogging/distortion 2. Check Covering (Indoor/Outdoor Unit) 3. Check EEV connector assemble condition/normal operation 4. Check refrigerant pressure → Reassemble or manage if abnormality found 1. Check resistance between each terminal of compressor (0.188 ±7%) 2. Check insulation resistance between compressor terminal and pipe (over 50MΩ ) → Replace compressor if abnormality found
Yes Is compressor Wire connection condition normal?
No
1. Check inverter PCB assembly U,V,W connector connection condition 2. Check wire disconnection and wiring 3. Check compressor terminal connection condition (bad contact) → Reassemble if abnormality found
Yes
Is input voltage normal?
No
Check L~N phase is 220V ±15% → Check connection condition and wiring if power is abnormal
No
Check inverter PCB assembly IPM normality → Replace inverter PCB assembly
Yes
Is inverter PCB assembly normal?
Yes Recheck power and installation condition
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 90 -
LGE Internal Use Only
16
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.17 Check code Trouble shooting CH32, CH33 Title
32
D-pipe (Inverter) temp. high (105˚C )
33
D-pipe (Constant) temp. high (105˚C ) →
→
Display code
Cause of error
Check point & Normal condition
• Discharge sensor (Inverter) temp. high
• Check the discharge pipe sensor for INV. • Check the install condition for over load. • Check the leakage of refrigerant. • Check the SVC V/V open. • Refer to sensor resistance table.
• Discharge sensor (Cons.) temp. high
• Check the discharge pipe sensor for Cons. • Check the install condition for over load. • Check the leakage of refrigerant. • Check the SVC V/V open. • Refer to sensor resistance table.
Check Flow Chart
Check Over load condition - Refrigerant leakage - Condenser is blocked - Outdoor fan is locked Yes
Is the resistance of the sensor is 200kΩ at 25˚C?
No Remove obstruction Change outdoor fan or motor Change refrigerant
Yes Plug the sensor on Indoor unit PCB
Unplug the sensor on Outdoor unit PCB
Estimate the Voltage of each sensor.
Check the Connector connection
Is it normal ?
No Change the sensor
Yes Is the voltage of the sensor is 4.5Vdc at 25˚C
No Correct connection
Yes
Yes Repair or Change the PCB.
Estimate the resistance of each sensor.
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
No Change the sensor
- 78 -
LGE Internal Use Only
17
Single A: Inverter & Synchro (UU..W & UU72 / 100) Display code
Title
39
Transmission Error Between (PFC Micom → INV Micom)
Cause of error
4. Trouble Shooting
Check point & Normal condition 1. Micom defect/Circuit defect 2. Different Micom S/W Version 3. ODU inverter PCB assembly damage
Communication Error Between PFC Micom and INV Micom.
■ Error Diagnosis and Countermeasure Flow Chart
Is PFC Micom & INV Micom S/W Program normal?
No
Upgrade Micom Program
Yes
Is Inverter PCB assembly normal?
No
Replace inverter PCB assembly
Yes
Recheck power and installation condition
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 115 -
LGE Internal Use Only
18
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.18 Check code Trouble shooting CH41, CH44, CH45, CH46, CH47, CH65 Display code
Title
41 47
D-pipe sensor(Inv) D-pipe sensor(Cons)
• Connector connection error • Normal resistor : 200KΩ/ at 25˚C (Unplugged) • Normal voltage : 4.5Vdc / at 25˚C (plugged) • Faulty PCB • Faulty sensor (Open / Short) • Refer to sensor resistance table.
44
Air sensor
• Connector connection error • Normal resistor : 10KΩ/ at 25˚C (Unplugged) • Normal voltage : 2.5Vdc / at 25˚C (plugged) • Faulty PCB • Faulty sensor (Open / Short) • Refer to sensor resistance table.
45 46
Condenser Pipe sensor Suction Pipe sensor
• Connector connection error • Normal resistor : 5KΩ/ at 25˚C (Unplugged) • Normal voltage : 2.5Vdc / at 25˚C (plugged) • Faulty PCB • Faulty sensor (Open / Short) • Refer to sensor resistance table.
65
Heat sink sensor
• Connector connection error • Normal resistor : 5KΩ/ at 25˚C (Unplugged) • Normal voltage : 2.5Vdc / at 25˚C (plugged) • Faulty PCB • Faulty sensor (Open / Short) • Refer to sensor resistance table.
Cause of error
Check point & Normal condition
Check Flow Chart
Unplug the sensor on Indoor unit PCB
Estimate the Voltage of each sensor.
Check the Connector connection
Is the voltage of the sensor is 4.5Vdc / 2.5Vdc at 25˚C
No Change the sensor
Yes Is it normal ?
No Correct connection
Yes
Repair or Change the PCB.
Unplugged
Plugged
Estimate the resistance of each sensor. Is the resistance of the Sensor is 200kΩ/10kΩ⁄ /5kΩ at 25˚C?
No Change the sensor
Yes
10kΩ
2.5Vdc
Ω
V
Plug the sensor on Indoor unit PCB
Check the resistance
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 79 -
Check the voltage
LGE Internal Use Only
19
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.19 Check code Trouble shooting CH51, CH60 Display code
Title
51
Over capacity
60
EEPROM Check sum
Cause of error
Check point & Normal condition
• Over capacity Combination
• Check the indoor unit capacity. • Check the combination table.
• Check sum error
• Check the connection port. • Check the poor soldering.
Check Flow Chart (CH51)
Check the indoor unit combination Check the outdoor unit max combination
Is it normal ?
No Correct connection
Yes Check PCB
Check Flow Chart (CH60) Check the the connection port.
Is it normal ?
No Correct connection
Yes Change EEPROM
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 80 -
LGE Internal Use Only
20
Single A: Inverter & Synchro (UU..W & UU72 / 100) Display code
Title
Cause of error
52
Transmission error between (Inverter PCB ➔ Main PCB)
Main controller of Master unit of Master unit can’t receive signal from inverter controller
4. Trouble Shooting
Check point & Normal condition 1. Power cable or transmission cable is not connected 2. Defect of outdoor Main fuse/Noise Filter 3. Defect of outdoor Main / inverter PCB
■ Error diagnosis and countermeasure flow chart Is transmission LED (Yellow) of inverter compressor PCB on?
No
Is noise filter or fuse normal?
No
Replace noise filter or fuse
Yes
Yes
Replace inverter compressor PCB
Is transmission cable connected correctly?
No Re-connect transmission cable
Yes
No Is MAIN PCB normal?
Replace MAIN PCB
Yes
Replace inverter compressor PCB
Check Point - Check the Transmission connector and LED (Main & Inverter)
48/56k
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 93 -
LGE Internal Use Only
21
Single A: Inverter & Synchro (UU..W & UU72 / 100)
Troubleshooting Guide
14) Troubleshooting CH54 Display code
Title
54
3-phase wrong wiring of main outdoor unit
Cause of error
• 3-phase wrong wiring of outdoor unit (Reverse Phase /omission of phase)
Check point & Normal condition
• Abnormal Main PCB • No connection of CN_Phase • Changed R, S, T connection order
Check Point 1. Check the connection condition of R,S,T wire. 2. Check the connection condition of CN_Phase. 3. Check the outdoor main fuse.
22
Single A: Inverter & Synchro (UU..W & UU72 / 100)
5. Trouble Shooting
6.20 Check code Trouble shooting CH61, CH62 Display code
Title
61
Condenser pipe sensor temp. high
• condenser pipe sensordetected high temp.(65˚C)
• Check the load condition. • Check the sensor of Condenser pipe sensor. • Normal resistor : 5KΩ/ at 25˚C (Unplugged) • Normal voltage : 2.5Vdc / at 25˚C (Plugged)
62
Heat sink sensor temp. high
• heat sink sensor detected high temp. (85˚C)
• Check the load condition. • Check the sensor of heat sink. • Normal resistor : 10KΩ/ at 25˚C (Unplugged) • Normal voltage : 2.5Vdc / at 25˚C (Plugged)
Cause of error
Check point & Normal condition
Check Flow Chart
Check Over load condition - Refrigerant leakage - Condenser is blocked - Outdoor fan is locked Yes
Is the resistance of the Sensor is 5kΩ /10kΩ at 25˚C?
No Remove obstruction Change outdoor fan or motor Change refrigerant
Yes Plug the sensor on Indoor unit PCB
Unplug the sensor on Outdoor unit PCB
Estimate the Voltage of each sensor.
Check the Connector connection
Is it normal ?
No Change the sensor
Yes Is the voltage of the sensor is 4.5Vdc / 2.5Vdc at 25˚C
No Correct connection
Yes
Yes Repair or Change the PCB.
Estimate the resistance of each sensor.
Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
No Change the sensor
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LGE Internal Use Only
23
Single A: Inverter & Synchro (UU..W & UU72 / 100)
4. Trouble Shooting Display code
73
Title
AC input instant over current error (Matter of software)
Cause of error
Check point & Normal condition
Inverter PCB input power current is over 48A(peak) for 2ms
1. Overload operation (Pipe clogging/Covering/EEV defect/Ref.overcharge) 2. Compressor damage (Insulation damage/Motor damage) 3. Input voltage abnormal (L, N) 4. Power line assemble condition abnormal 5. Inverter PCB assembly damage (input current sensing part)
■ Error Diagnosis and Countermeasure Flow Chart Is installation condition normal?
No
Yes
1.Check Pipe clogging/distortion 2.Check Covering (Indoor/Outdoor Unit) 3.Check EEV connector assemble condition/normal operation 4.Check refrigerant pressure → Reassemble or manage if abnormality found
No
Check L~N phase voltage is 220V ± 10% → Check connection condition and wiring if power is abnormal
No
1.Check L,N connection condition 2.Check wire disconnection and wiring → Reassemble if abnormality found
No
1.Check inverter PCB assembly U,V,W connector connection condition 2.Check wire disconnection and wiring 3.Check compressor terminal connection condition(bad contact) → Reassemble if abnormality found
Is input voltage normal?
Yes
Is AC input Wire connection condition normal? Yes
Is compressor Wire connection condition normal? Yes
Is inverter PCB assembly normal?
No Check inverter PCB assembly IPM normality → Replace inverter PCB assembly
Yes Recheck power and installation condition
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 102 -
LGE Internal Use Only
24
Single A: Inverter & Synchro (UU..W & UU72 / 100)
Troubleshooting Guide
16) Troubleshooting CH67, CH105 Display code
Title
Cause of error
67
Outdoor fan lock
• Outdoor fan is not operating
• Check the fan condition. • Check the fan connector
105
Communication error between main PCB and fan PCB
• Communication error between main PCB and fan PCB
• Short or fusing of communication line • Poor outdoor unit PCB • Power input when the DC link capacitor discharges
Check Point
Check point & Normal condition
• CH 67
• CH 105
1. Check the install condition for fan.
1. Is communication line between the main PCB and the fan PCB normal? 2. Is the communication LED on?
25
Single A Aan / uit, Single-split AT-C.. / AT-H.. LB-C.. / LB-D.. / LB-E.. / LB-G.. / LB-H.. LT-B.. / LT-C.. / LT-D.. / LT-E.. LV-B.. P03AH / P05AH / P08AH
26
Single A: Aan/uit Single-split (voor modellen, zie pag. 26)
Troubleshooting Guide
1) Troubleshooting CH01, CH02, CH06 Display code
Title
01
Indoor air sensor
• Open / Short • Soldered poorly • Internal circuit error
Normal resistor : 10K. / at 25°C (Unplugged) Normal voltage : 2.5Vdc / at 25°C (plugged)
02
Indoor inlet pipe sensor
• Open / Short • Soldered poorly • Internal circuit error
Normal resistor : 5K. / at 25°C (Unplugged) Normal voltage : 2.5Vdc / at 25°C (plugged)
Indoor outlet pipe sensor
• Open / Short • Soldered poorly • Internal circuit error
Normal resistor : 5K. / at 25°C (Unplugged) Normal voltage : 2.5Vdc / at 25°C (plugged)
06
Cause of error
Check point & Normal condition
10k.
2.5Vdc
.
V
Check the resistance
Check the voltage
Check Point
1. Unplug the sensor on Indoor unit PCB. 2. Estimate the resistance of each sensor. 3. If the resistance of the sensor is 10K. / 5K. at 25°C, then sensor is normal. 4. If the resistance of the sensor is 0 K. or 8 , then sensor is abnormal. → Change the sensor. 5. Plug the sensor on Indoor unit PCB and Power ON. 6. Estimate the voltage of each sensor. 7. If the voltage of the sensor is 2.5Vdc at 25°C, then sensor is normal. 8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. → Repair or Change the PCB.
27
Single A: Aan/uit Single-split (voor modellen, zie pag. 26)
Troubleshooting Guide 2) Troubleshooting CH03 Display code
Title
03
Communication Wired R/C
Cause of error
Wired R/C 12V
S
• Open / Short • Wrong connection
Indoor Unit
GND
12V
S
• Connection of wire • Main PCB Volt. DC12V • Noise interference
CN-REMO
GND
12Vdc
12Vdc
V
V
Check the Volt.
Check point & Normal condition
Check the Volt.
Check Point
1. Check the wire connection. (Open / Short) → Repair the connection 2. Check the soldering state of connector. (Soldered poorly) → Repair or Change the PCB. 3. Check the volt. Of main PCB power source. (DC 12V, DC 5V) → Repair or Change the main PCB. 4. Check the installation of wired remote controller. (Noise interference) → Adjust the state of installation
28
Single A: Aan/uit Single-split (voor modellen, zie pag. 26)
Troubleshooting Guide
3) Troubleshooting CH04 Display code
Title
04
Drain pump / Float switch
Cause of error • Float switch Open. (Normal : short)
Check point & Normal condition • The connection of wire(Drain pump/ Float switch) • Drain pump power input. (220V) • Drain tube installation. • Indoor unit installation. (Inclination)
CN Float
CN-D/PUMP CN-Float
0. .
Check the resistance
Check Point
1. Check the wire connection. (Open, Soldered poorly) → Repair the connection or change the PCB. 2. Check the resistance of float switch (Abnormal : Open, Normal : short) → Check the float switch. 3. Check the level of water 4. Check the volt. Of Drain pump power supply. (AC 230V) → Repair or Change the main PCB.
29
Troubleshooting Guide
Single A: Aan/uit Single-split (voor modellen, zie pag. 26)
4) Troubleshooting CH05, CH53 Display code 05 / 53
Title
Communication (Indoor → Outdoor)
Cause of error
• Communication poorly
Check point & Normal condition • Power input AC 220V. (Outdoor, Indoor) • The connector for transmission is disconnected. • The connecting wires are misconnected. • The GND1,2 is not connected at main GND. • The communication line is shorted at GND. • Transmission circuit of outdoor PCB is abnormal. • Transmission circuit of indoor PCB is abnormal.
Check Point
1. Check the input power AC230V. (Outdoor, Indoor unit) 2. Check the communication wires are correctly connected. → Adjust the connection of wire → Confirm the wire of “Live”, “Neutral” 3. Check the resistance between communication line and GND. (Normal : Over 2M. ) 4. Check the connector for communication is correctly connected. 5. Check the connection of GND1, GND2, and main GND. 6. If one indoor unit is operated normally, outdoor PCB is no problem. → Check the another indoor unit. * CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit.
30
Single A: Aan/uit Single-split (voor modellen, zie pag. 26)
Troubleshooting Guide
5) Troubleshooting CH21 Display code
Title
21
Cause of error
• Instant over current • Over Rated current • Poor insulation of IPM
DC Peak
Comp U
Terminal U-V V-W W-U
W
Comp
• An instant over current in the U,V,W phase - Comp lock - The abnormal connection of U,V,W • Over load condition - Overcharging of refrigerant - Pipe length. • Poor insulation of compressor
Resistance(. ) at 20°C .
V
Check point & Normal condition
Copper pipe
Inverter Constant comp. comp. 0.64 0.64 0.64
0.8 0.8 0.8
Resistance(. ) at 20°C .
Terminal U-GND V-GND W-GND
Inverter Constant comp. comp. 2M. 2M. 2M.
2M. 2M. 2M.
Check Point
1. Check the wire connection. (U,V,W) 2. Check the load condition. (Refrigerant, Pipe length, …) → Adjust the load condition 3. Check the electricity leakage of the compressor. → Normal : Over 2M. . 4. Check the resistance of compressor. → Normal : 0.65. (INV), 0.8. (Cons.) → No difference at each terminal. 5. Check the insulation from water at IPM part. → Check the trace of water. 6. Check the IPM circuit.
31
Single A: Aan/uit Single-split (voor modellen, zie pag. 26)
Troubleshooting Guide
6) Troubleshooting CH21, CH22 Display code
Title
Cause of error
21
Max. C/T
22
C/T Internal circuit
Check point & Normal condition
Over current (14A )
Malfunction of compressor Blocking of pipe Low voltage input Refrigerant, pipe length, blocked, …
Initial current error
Malfunction of current detection circuit. (Open / Short) The voltage of “C01N” Is 4.0Vdc(25A) .
V
-
Check Point 1. Check the power source.
+
-
2. Check the fan operation is right.
+
-
3. Check the current. 4. Check the install condition. 5. Check the internal circuit. (C/T, Diode, Resistor)
108 Universal System Air Conditioner
+
Troubleshooting Guide
Single A: Aan/uit Single-split (voor modellen, zie pag. 26)
8) Troubleshooting CH24, CH25 Display code
Title
24
Press S/W Open
25
Input voltage
Cause of error
Check point & Normal condition
• Low / High press S/W open.
• Check the connection of “CN_Press”. • Check the components.
• Abnormal Input voltage (140Vac , 300Vac .
• Check the power source. • Check the components.
TRANS1 50Hz, DC12V
CN PRESS
CN TRNAS1
Check Point • CH 24
• CH 25
1. Check the connection of “CN_PRESS”
1. Check the power source.
2. Check the install condition for over load.
2. Check the components (Trans1, B/Diode, Diode, Resistance)
3. Check the SVC V/V open. 4. Check the leakage of refrigerant.
110 Universal System Air Conditioner
Troubleshooting Guide
Single A: Aan/uit Single-split (voor modellen, zie pag. 26)
10) Troubleshooting CH32, CH33 Display code
Title
32
D-pipe (Inverter) temp. high (105°C )
33
D-pipe (Constant) temp. high (105°C )
Cause of error
Check point & Normal condition
• Discharge sensor (Inverter) temp. high
• Check the discharge pipe sensor for INV. • Check the install condition for over load. • Check the leakage of refrigerant. • Check the SVC V/V open.
• Discharge sensor (Cons.) temp. high
• Check the discharge pipe sensor for Cons. • Check the install condition for over load. • Check the leakage of refrigerant. • Check the SVC V/V open.
D-Pipe temp. Toff(105) °C T2(95) °C T1(90) °C
COMP Frequency Normal (Hz) LEV Openness (Pulse)
Normal
Normal
OFF
Normal
OFF Control
Check Point • CH 32
• CH 33
1. Check the install condition for over load.
1. Check the install condition for over load.
2. Check the SVC V/V open.
2. Check the SVC V/V open.
3. Check the leakage of refrigerant.
3. Check the leakage of refrigerant. 4. Check the constant compressor. (same with CH21)
34
Single A: Aan/uit Single-split (voor modellen, zie pag. 26)
Troubleshooting Guide
11) Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65 Display code
Title
41
D-pipe sensor (Inverter)
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 200K. / at 25°C (Unplugged) • Normal voltage : 4.5Vdc / at 25°C (plugged)
44
Air sensor
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 10K. / at 25°C (Unplugged) • Normal voltage : 2.5Vdc / at 25°C (plugged)
45
Condenser Pipe sensor
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 5K. / at 25°C (Unplugged) • Normal voltage : 2.5Vdc / at 25°C (plugged)
46
Suction Pipe sensor
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 5K. / at 25°C (Unplugged) • Normal voltage : 2.5Vdc / at 25°C (plugged)
D-pipe sensor (Constant)
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 200K. / at 25°C (Unplugged) • Normal voltage : 4.5Vdc / at 25°C (plugged)
Heat sink sensor
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 10K. / at 25°C (Unplugged) • Normal voltage : 2.5Vdc / at 25°C (plugged)
47
65
Cause of error
Check point & Normal condition
Check Point
1. Estimate the resistance of each sensor.(Unplugged) 2. Estimate the voltage of each sensor.(Plugged) 3. If the resistance of the sensor is 0 k. or 8 , then sensor is abnormal.
.
If the voltage of the sensor is 0 V or 5Vdc, then sensor is abnormal.
35
Single A: Aan/uit Single-split (voor modellen, zie pag. 26)
Troubleshooting Guide
12) Troubleshooting CH51, CH60 Display code
Title
51
Over capacity
60
EEPROM Check sum
Cause of error
Check point & Normal condition
• Over capacity Combination
• Check the indoor unit capacity. • Check the combination table.
• Check sum error
• Check the PCB ASM P/No. • Check the poor soldering.
Model
Gross max. capacity
Max. single indoor unit capacity
AUUW126B
21k
12k
AUUW186B AUUW246B
24k
12K
AUUW306B AUUW366B
33k
18K
AUUW4860
39k
18K
AUUW6060
52k
24K
Check Point • CH 51
• CH 60
1. Check the indoor unit capacity.
1. Check the insertion condition of EEPROM. 2. Check the poor soldering
36
Single A: Aan/Uit Single-split (voor modellen, zie pag. 26)
Troubleshooting Guide
13) Troubleshooting CH61, CH62 Display code
Title
Cause of error
61
Condenser pipe sensor temp. high
• Condenser pipe sensor detected high temp.(65°C)
• Check the load condition. • Check the sensor of Condenser pipe sensor.
62
Heat sink sensor temp. high
• Heat sink sensor detected high temp.(85°C)
• Check the fan is locked. • Check the sensor of heat sink.
Check point & Normal condition
Heat Sink temp. Toff °C T2 °C T1 °C
COMP Frequency Normal (Hz)
Normal
Check Point
OFF
Normal
• CH 61
• CH 62
1. Check the install condition for over load. (Refrigerant, Pipe length, Blocked, …)
1. Check the fan is locked. 2. Check the Outdoor temp. is very high.
37
Single A: Aan/uit Single-split (voor modellen, zie pag. 26) Troubleshooting Guide
Troubleshooting CH54 Display code
Title
54
Phase error
Cause of error
Check point & Normal condition
• Check the Main power • Check the CN_PHASE connector
• Phase change
U
V
Phase_A
W
5.3 msec
Phase_B Phase_C 1 0 1
1 0 0
1 1 0
0 1 0
0 1 1
0 0 1
Check Point 1. Check the Main power. 2. Check the connecting state of connector CN_3PHASE on the outdoor pcb ass'y.
38
LG
Multi-split Inverter FM..AH
39
Multi-split: Inverter FM..AH
4. Trouble Shooting
6.6 Troubleshooting Indoor Error Display code
Title
01
Indoor air sensor
• Open / Short • Soldered poorly • Internal circuit error
Normal resistor : 10KΩ/ at 25°C (Unplugged) Normal voltage : 2.5Vdc / at 25°C (plugged)
02
Indoor inlet pipe sensor
• Open / Short • Soldered poorly • Internal circuit error
Normal resistor : 5KΩ/ at 25°C (Unplugged) Normal voltage : 2.5Vdc / at 25°C (plugged)
06
Indoor outlet pipe sensor
• Open / Short • Soldered poorly • Internal circuit error
Normal resistor : 5KΩ/ at 25°C (Unplugged) Normal voltage : 2.5Vdc / at 25°C (plugged)
Cause of error
Check point & Normal condition
10kΩ
2.5Vdc
Ω
V
Check the resistance
Check the voltage
Check Point 1. Unplug the sensor on Indoor unit PCB. 2. Estimate the resistance of each sensor. 3. If the resistance of the sensor is 10KΩ/ 5KΩ at 25°C, then sensor is normal. 4. If the resistance of the sensor is 0 KΩ or ∞, then sensor is abnormal. → Change the sensor. 5. Plug the sensor on Indoor unit PCB and Power ON. 6. Estimate the voltage of each sensor. 7. If the voltage of the sensor is 2.5Vdc at 25°C, then sensor is normal. 8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. → Repair or Change the PCB.
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
40
Multi-split: Inverter FM..AH
4. Trouble Shooting Display code
Title
03
Communication Wired R/C
Cause of error
Wired R/C 12V
S
• Open / Short • Wrong connection
Indoor Unit
GND
12V
S
• Connection of wire • Main PCB Volt. DC12V • Noise interference
CN-REMO
GND
12Vdc
12Vdc
V
V
Check the Volt.
Check point & Normal condition
Check the Volt.
Check Point 1. Check the wire connection. (Open / Short) → Repair the connection 2. Check the soldering state of connector. (Soldered poorly) → Repair or Change the PCB. 3. Check the volt. Of main PCB power source. (DC 12V, DC 5V) → Repair or Change the main PCB. 4. Check the installation of wired remote controller. (Noise interference) → Adjust the state of installation
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 60 -
LGE Internal Use Only
41
Multi-split: Inverter FM..AH Display code
Title
04
Drain pump / Float switch
Cause of error
• Float switch Open. (Normal : short)
4. Trouble Shooting Check point & Normal condition
• The connection of wire(Drain pump/ Float switch) • Drain pump power input. (220V) • Drain tube installation. • Indoor unit installation. (Inclination)
CN Float
CN-D/PUMP CN-Float
0Ω Ω
Check the resistance
Check Point 1. Check the wire connection. (Open, Soldered poorly) → Repair the connection or change the PCB. 2. Check the resistance of float switch (Abnormal : Open, Normal : short) → Check the float switch. 3. Check the level of water 4. Check the volt. Of Drain pump power supply. (AC 230V) → Repair or Change the main PCB.
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 61 -
LGE Internal Use Only
42
4. Trouble Shooting
Multi-split: Inverter FM..AH
6.7 Troubleshooting Outdoor Error ▶FM15AH t/m FM25AH
Display code
05 / 53
Title
Communication (Indoor → Outdoor)
Cause of error
• Communication poorly
Check point & Normal condition • Power input AC 220V. (Outdoor, Indoor) • The connector for transmission is disconnected. • The connecting wires are misconnected. • The GND1,2 is not connected at main GND. • The communication line is shorted at GND. • Transmission circuit of outdoor PCB is abnormal. • Transmission circuit of indoor PCB is abnormal.
Check Point 1. Check the input power AC230V. (Outdoor, Indoor unit) 2. Check the communication wires are correctly connected. → Adjust the connection of wire → Confirm the wire of “Live”, “Neutral” 3. Check the resistance between communication line and GND. (Normal : Over 2MΩ) 4. Check the connector for communication is correctly connected. 5. Check the connection of GND1, GND2, and main GND. 6. If one indoor unit is operated normally, outdoor PCB is no problem. → Check the another indoor unit. * CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit.
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 62 -
LGE Internal Use Only
43
Multi-split: Inverter FM..AH
4. Trouble Shooting ▶FM27AH t/m FM57AH Display code
Title
05 / 53
Title Communication (Indoor → Outdoor)
Cause of error
• Communication poorly
Check point & Normal condition • Power input AC 220V. (Outdoor, Indoor) • The connector for transmission is disconnected. • The connecting wires are misconnected. • The communication line is shorted at GND. • Transmission circuit of outdoor PCB is abnormal. • Transmission circuit of indoor PCB is abnormal.
Check Point 1. Check the input power AC230V. (Outdoor, Indoor unit) 2. Check the communication wires are correctly connected. Adjust the connection of wire Confirm the wire of "Live", "Neutral" 3. Check the resistance between communication line and GND. (Normal : Over 2MΩ) 4. Check the connector for communication is correctly connected. 5. If one indoor unit is operated normally, outdoor PCB is no problem. Check the another indoor unit. * CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit. 6. If all indoor unit is displayed CH05 but outdoor PCB not display CH53 : Check the CN_COM and CN_POWER is correctly connected.
L
N
< TERMINAL BLOCK >
• 27/30/40k 1. In Case of CH53, Check the Connection → L , N at the terminal block • 48/56k 1. In Case of CH05, Check the Connection → CN-POWER, CN-COMM at the Main PCB 2. In Case of CH53, Check the Connection → CN-COMM at the Main PCB → L , N at the terminal block
L
N
N L
N
CN-COMM
CN-Power < MAIN PCB >
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 72 -
LGE Internal Use Only
44
Multi-split: Inverter FM..AH
FM15AH t/m FM27AH 4. Trouble Shooting Display code
Title
Cause of error
• Instant over current • Over Rated current • Poor insulation of IPM
DC PEAK (IPM Fault)
21
Check point & Normal condition • An instant over current in the U,V,W phase - Comp lock - The abnormal connection of U,V,W • Over load condition - Overcharging of refrigerant Pipe length. Outdoor Fan is stop • Poor insulation of compressor
■ Error Diagnosis and Countermeasure Flow Chart 1. Check Pipe clogging/distortion 2. Check Covering (Indoor/Outdoor Unit) 3. Check EEV connector assemble condition/normal operation 4. Check refrigerant pressure Reassemble or manage if abnormality found
No
Is installation condition normal?
Yes Are the resistance Between each phase and insulation resistance of Inverter compressor normal?
1. Check resistance between each terminal of compressor (1.083~1.123Ω ±5%) 2. Check insulation resistance between compressor terminal and pipe (over 50M ) Replace compressor if abnormality found
No
Yes Is compressor Wire connection condition normal?
No
1. Check inverter PCB assembly U,V,W connector connection condition 2. Check wire disconnection and wiring 3. Check compressor terminal connection condition (bad contact) Reassemble if abnormality found
No
Check inverter PCB assembly IPM normality Replace inverter PCB assembly
Yes
Is inverter PCB assembly normal?
Yes Recheck power and installation condition
■ Comp checking method Comp U
Resistance(Ω) at 20°C Ω
V
W
Comp
Copper pipe
Terminal
Inverter comp.
U-V V-W W-U
1.083 1.123 1.096
Resistance(Ω) at 20°C Ω
Terminal
Inverter comp.
U-GND V-GND W-GND
50MΩ 50MΩ 50MΩ
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
LGE Internal Use Only
45
Multi-split: Inverter FM..AH
FM15AH t/m FM25AH
4. Trouble Shooting
1. Wait until inverter PCB DC voltage is discharged after main power off. 2. Pull out CN-L1(R), CN-L2(S), CN-L3(T) and CN-COMP Connector. 3. Set multi tester to resistance mode. 4. If the value between P and N terminal of IPM is short(0Ω) or open(hundreds MΩ), PCB needs to be replaced.(IPM damaged) 5. Set the multi tester to diode mode. 6. In case measured value is different from the table, PCB needs to be replaced.(PCB damaged). P
U
V
W
Nu Nv Nw
P
U
V
W
Nu Nv Nw
27
26
25
24
23 22 21
27
26
25
24
23 22 21
0.4 ~ 0.6 V
0.4 ~ 0.6 V
PFC_IPM check U, V, W ➔ R S T
CAUTION In case that the control box is opend and before checking electrical parts, it should be checked that the LED 01M, 02M turned off(wait 7 minutes after main power OFF), otherwise it may cause electrical shock.
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
LGE Internal Use Only
46
Multi-split: Inverter FM..AH
FM27AH t/m FM57AH Display code
Title
Cause of error
• Instant over current • Over Rated current • Poor insulation of IPM
DC PEAK (IPM Fault)
21
4. Trouble Shooting Check point & Normal condition
• An instant over current in the U,V,W phase - Comp lock - The abnormal connection of U,V,W • Over load condition - Overcharging of refrigerant Pipe length. Outdoor Fan is stop • Poor insulation of compressor
■ Error Diagnosis and Countermeasure Flow Chart 1. Check Pipe clogging/distortion 2. Check Covering (Indoor/Outdoor Unit) 3. Check EEV connector assemble condition/normal operation 4. Check refrigerant pressure Reassemble or manage if abnormality found
No
Is installation condition normal?
Yes Are the resistance Between each phase and insulation resistance of Inverter compressor normal?
1. Check resistance between each terminal of compressor (0.34~0.35 7%) 2. Check insulation resistance between compressor terminal and pipe (over 50M ) Replace compressor if abnormality found
No
Yes Is compressor Wire connection condition normal?
No
1. Check inverter PCB assembly U,V,W connector connection condition 2. Check wire disconnection and wiring 3. Check compressor terminal connection condition (bad contact) Reassemble if abnormality found
No
Check inverter PCB assembly IPM normality Replace inverter PCB assembly
Yes
Is inverter PCB assembly normal?
Yes Recheck power and installation condition
■ Comp checking method Comp U
Resistance(Ω) at 20°C Ω
V
U-V V-W W-U
W
Comp
Terminal
Copper pipe
Inverter Constant comp. comp. 0.64 0.64 0.64
0.8 0.8 0.8
Resistance(Ω) at 20°C Ω
Terminal U-GND V-GND W-GND
Inverter Constant comp. comp. 2MΩ 2MΩ 2MΩ
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
2MΩ 2MΩ 2MΩ
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LGE Internal Use Only
47
Multi-split: Inverter FM..AH
4. Trouble Shooting ■FM27AH t/m FM41AH
LED01M
LED02M
U,V,W CONNECTOR
U V W
1. Wait until inverter PCB DC voltage is discharged after main power off. 2. Pull out V, V, W COMP connector. 3. Set multi tester to resistance mode. 4. If the value between P and N terminal of IPM is short(0Ω) or open(hundreds MΩ), PCB needs to be replaced.(IPM damaged) 5. Set the multi tester to diode mode. 6. In case measured value is different from the table, PCB needs to be replaced.(PCB damaged). P
U
V
W
Nu Nv Nw
P
U
V
W
Nu Nv Nw
27
26
25
24
23 22 21
27
26
25
24
23 22 21
0.4 ~ 0.6 V
0.4 ~ 0.6 V
PFC_IPM chec U, V, W ➔ R S
CAUTION In case that the control box is opend and before checking electrical parts, it should be checked that the LED 01M, 02M turned off(wait 7 minutes after main power OFF), otherwise it may cause electrical shock.
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
LGE Internal Use Only
48
Multi-split: Inverter FM..AH
4. Trouble Shooting
■ FM49AH t/m FM57AH
U V W
LED01M
LED02M
CN(L)_BRWON
CN(N)_BLUE U,V,W CONNECTOR
1. Wait until inverter PCB DC voltage is discharged after main power off. 2. Pull out CN(L), CN(N) connectors and U,V,W COMP Connector. 3. Set multi tester to resistance mode. 4. If the value between P and N terminal of IPM is short(0Ω) or open(hundreds MΩ), PCB needs to be replaced.(IPM damaged) 5. Set the multi tester to diode mode. 6. In case measured value is different from the table, PCB needs to be replaced.(PCB damaged). P
U
V
W
Nu Nv Nw
P
U
V
W
Nu Nv Nw
27
26
25
24
23 22 21
27
26
25
24
23 22 21
0.4 ~ 0.6 V
0.4 ~ 0.6 V
PFC_IPM chec U, V, W ➔ R S
CAUTION In case that the control box is opend and before checking electrical parts, it should be checked that the LED 01M, 02M turned off(wait 7 minutes after main power OFF), otherwise it may cause electrical shock.
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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49
Multi-split: Inverter FM..AH
FM15AH t/m FM25AH 4. Trouble Shooting Display code
Title
Max. C/T
22
Cause of error
Input Over Current
Check point & Normal condition 1. Malfunction of Compressor 2. Blocking of Pipe 3. Low Voltage Input 4. Refrigerant, Pipe length, Blocked...
■ Error Diagnosis and Countermeasure Flow Chart Is installation condition normal?
No
Yes Are the resistance Between each phase and insulation resistance of Inverter compressor normal?
No
1. Check Pipe clogging/distortion 2. Check Covering (Indoor/Outdoor Unit) 3. Check EEV connector assemble condition/normal operation 4. Check refrigerant pressure → Reassemble or manage if abnormality found 1. Check resistance between each terminal of compressor 1.083~1.123Ω ±5% 2. Check insulation resistance between compressor terminal and pipe (over 50MΩ ) → Replace compressor if abnormality found
Yes Is compressor Wire connection condition normal?
No
1. Check inverter PCB assembly U,V,W connector connection condition 2. Check wire disconnection and wiring 3. Check compressor terminal connection condition (bad contact) → Reassemble if abnormality found
Yes
Is inverter PCB assembly power connection normal?
No
Check connection between inverter PCB assembly and bridge diode(misconnection, disconnection) → wiring again if abnormality found
No
Check R~S/S~T/T~R phase voltage is 380V ±10% R~N/S~N/T~N phase voltage is 220V ±10% → Check connection condition and wiring if power is abnormal.
No
Check inverter PCB assembly IPM normality → Replace inverter PCB assembly
Yes
Is input voltage normal?
Yes
Is inverter PCB assembly normal?
Yes Recheck power and installation condition
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50
FM15AH t/m FM25AH
Multi-split: Inverter FM..AH
4. Trouble Shooting
Check Point 1. Check the power source.(200~240V) 2. Check the fan operation is right. 3. Check the current. 4. Check the install condition. 5. Check the CT Sensor Output signal (Check output pin 1.2 of the CT Sensor : 5V )
Tester
CT Sensor Output (at the INVERTER PCB)
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
51
Multi-split: Inverter FM..AH
FM27AH t/m FM57AH 4. Trouble Shooting Display code
22
Title
Cause of error
Max. C/T
Input Over Current(27/30/40k-17A↑ 48/56k-29A↑ )
Check point & Normal condition 1. Malfunction of Compressor 2. Blocking of Pipe 3. Low Voltage Input 4. Refrigerant, Pipe length, Blocked...
■ Error Diagnosis and Countermeasure Flow Chart
Is installation condition normal?
No
Yes Are the resistance Between each phase and insulation resistance of Inverter compressor normal?
No
1. Check Pipe clogging/distortion 2. Check Covering (Indoor/Outdoor Unit) 3. Check EEV connector assemble condition/normal operation 4. Check refrigerant pressure → Reassemble or manage if abnormality found 1. Check resistance between each terminal of compressor (0.188 ±7%) 2. Check insulation resistance between compressor terminal and pipe (over 50MΩ ) → Replace compressor if abnormality found
Yes Is compressor Wire connection condition normal?
No
1. Check inverter PCB assembly U,V,W connector connection condition 2. Check wire disconnection and wiring 3. Check compressor terminal connection condition (bad contact) → Reassemble if abnormality found
Yes
Is inverter PCB assembly power connection normal?
No
Check connection between inverter PCB assembly and bridge diode(misconnection, disconnection) → wiring again if abnormality found
No
Check L~N phase is 220V ±15% → Check connection condition and wiring if power is abnormal
No
Check inverter PCB assembly IPM normality → Replace inverter PCB assembly
Yes
Is input voltage normal?
Yes
Is inverter PCB assembly normal?
Yes Recheck power and installation condition
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52
FM27AH t/m FM57AH
Multi-split: Inverter FM..AH
4. Trouble Shooting
Check Point 1. Check the power source.(220V ±15%) 2. Check the fan operation is right. 3. Check the current. 4. Check the install condition. 5. Check the CT Sensor Output signal (27/30/40k - Check output the CT Sensor : DC 2.5±0.2V) (48/56k - Check output pin 1.2 of the CT Sensor : 5V )
Vdc < Input Power Source Check Point >
< Main PCB>
< Inverter PCB>
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
53
Multi-split: Inverter FM..AH
FM15AH t/m FM25AH 4. Trouble Shooting Display code
23
Title
DC Link Low voltage
Cause of error
• DC Link volt is below 300V
Check point & Normal condition • Check point & Normal condition • Check the TAB1 is connect. • At not operating : DC Link voltage(260V↑ ) • At Comp operating : DC Link voltage(500V↑ )
■ Error Diagnosis and Countermeasure Flow Chart Is DC Link voltage under 380V ?
No
Check the DC link Voltage AD Input of Inverter PCB If AD Input is strange, change the Inverter PCB (refer the next page.)
Yes
Is input voltage normal ?
No
R~S/S~T/T~R phase voltage is 400V ±10% R~N/S~N/T~N phase voltage is 220V ±10% → Check connection condition and wiring if power is abnormal.
No
Check connection from terminal block to Inverter PCB assembly CN_L1(R), CN_L2(S), CN_L3(T)
Yes
Is Inverter PCB assembly Power connection normal?
Yes
Is Inverter PCB Normal?
No
Replace inverter PCB assembly
Yes Recheck power and installation condition
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
54
FM15AH t/m FM27AH
Multi-split: Inverter FM..AH
4. Trouble Shooting
Check Point 1. Check the Tab1 connection condition. (Refer to outdoor wiring diagram) 2. Check the CN_L1(R), CN_L2(S), CN_L3(T) connection condition 3. Check the DC Link voltage at not operating(380V↑ ) 4. Check the DC Link voltage at Comp operating(500V↑ ) 5. Check DC Link Sensing Signal (Refer the Picture)
Vdc 500Vdc ±10% +
GND
GND
Tester
DC Link Voltage oltage INV
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
55
FM27AH t/m FM57AH 4. Trouble Shooting Display code
23
Multi-split: Inverter FM..AH
Title
DC Link Low voltage
Cause of error
• DC Link volt is below 140Vdc
Check point & Normal condition • Check point & Normal condition • Check theCN_(L),CN_(N) Connection. • At not operating : DC Link voltage(280V↑ ) • At Comp operating : DC Link voltage(340V↑ )
■ Error Diagnosis and Countermeasure Flow Chart No Check L~N Voltage is 220V±15%
Is input voltage normal ? Yes No Is Inverter PCB assembly Power connection normal?
Check connection from terminal block to Inverter PCB assembly CN(L), CN(N)
Yes No Is Inverter PCB Normal?
Replace inverter PCB assembly
Yes Recheck power and installation condition
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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56
FM27AH t/m FM57AH
Multi-split: Inverter FM..AH
4. Trouble Shooting
Check Point 1. Check the WCN_P(L),P(N) Connection condition at the Main PCB.(Refer to outdoor wiring diagram) 2. Check the DC Link voltage at not operating(280V↑ ) 3. Check the DC Link voltage at Comp operating(340V↑ ) 4. Check DC Link Sensing Signal :2.4~2.8V (Refer the Picture)
< Input Power Source Check Point > 27/30/40k
Vdc < Main PCB>
Vdc
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
57
Multi-split: Inverter FM..AH
4. Trouble Shooting
FM49AH t/m FM57AH Vdc
N GND
< Inverter PCB>
L
Vdc
DC_LINK GND
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
58
Multi-split: Inverter FM..AH Display code
Title
24
Press S/W Open
Cause of error
• Low / High press S/W open.
4. Trouble Shooting Check point & Normal condition
• Check the connection CN_L/PRESS,H/PRESS • Check the components.
■ Error diagnosis and countermeasure flow chart Is high pressure switch connector connected to PCB?*
No
Connect securely
Yes
Is high pressure switch connector short during off time?**
No
Replace high pressure switch
Yes
Is SVC valve open?
No
Open SVC valve
Yes Is this error appeared again after reset?
No
Re-check momentary problem or not
Yes Is high pressure more than 2500kPa at manifold gauge?
No
Replace PCB
Yes Is high pressure of LGMV similar as at manifold gauge?
No
Replace high pressure sensor
Yes Check pipe is blocked or not and take measure
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59
4. Trouble Shooting
Multi-split: Inverter FM..AH
Check Point 1. Check the connection of H/press switch 2. Check short or not at the connector of high pressure switch (Normal open) 27/30/40k
< Main PCB : Connection Check Point >
< Checking the Press switch >
48/56k
< Main PCB : Connection Check Point >
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
< Checking the H/press switch >
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LGE Internal Use Only
60
Multi-split: Inverter FM..AH
FM15AH t/m FM25AH 4. Trouble Shooting Display code
Title
25
Input voltage
Cause of error Abnomal Input Voltage (R,S,T -N /140Vac↓ , 300Vac ↑ )
Check point & Normal condition
Check the power source. • Check the components.
■ Error Diagnosis and Countermeasure Flow Chart Is input voltage normal?
No
R~S/S~T/T~R phase voltage is 400V ±10% R~N/S~N/T~N phase voltage is 220V ±10% → Check connection condition and wiring if power is abnormal.
Yes
Is Inverter PCB Normal?
No
Replace inverter PCB assembly
Yes Recheck power and installation condition
Tester
GND
< CH25 Check Point >
INPUT VOLTAGE VOL AGE INV
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LGE Internal Use Only
61
Multi-split: Inverter FM..AH
FM27AH t/m FM57AH Display code
Title
Cause of error
25
Input voltage
• Abnormal Input voltage (140Vac , 300Vac)
4. Trouble Shooting Check point & Normal condition
• Check the power source. • Check the components.
■ Error Diagnosis and Countermeasure Flow Chart Is input voltage normal ?
No
Check L~N Voltage is 220V±15%
Yes Is Inverter PCB Normal?
No
Replace inverter PCB assembly
Yes Recheck power and installation condition
Check Point 1. Check the Input Voltage (L–N ➔ 220V±10%) 2. Check Input Voltage Sensor output voltage (2.5Vdc±10%)
< Input Power Source Check Point >
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62
4. Trouble Shooting
Multi-split: Inverter FM..AH
FM27AH t/m FM57AH
Vdc
< Inverter PCB>
< Input Voltage Sensing Check Point >
FM49AH t/m FM57AH
Vdc
INPUT(V) GND
< Input Voltage Sensing Check Point >
< Inverter PCB>
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
63
Multi-split: Inverter FM..AH
FM15AH t/m FM25AH Display code
Title
26
DC Compressor Position
Cause of error
• Compressor Starting fail error
4. Trouble Shooting Check point & Normal condition
• Check the connection of comp wire “U,V,W” • Malfunction of compressor • Check the component of “IPM”, detection parts.
■ Error Diagnosis and Countermeasure Flow Chart
Is installation condition normal?
No
1. Check Pipe clogging/distortion 2. Check Covering (Indoor/Outdoor Unit) 3. Check EEV connector assemble condition/normal operation 4. Check refrigerant pressure → Reassemble or manage if abnormality found
Yes Are the resistance Between each phase and insulation resistance of Inverter compressor normal?
No
1. Check resistance between each terminal of compressor (0.188 ±7%) 2. Check insulation resistance between compressor terminal and pipe (over 50MΩ ) → Replace compressor if abnormality found
Yes Is compressor Wire connection condition normal?
No
1. Check inverter PCB assembly U,V,W connector connection condition 2. Check wire disconnection and wiring 3. Check compressor terminal connection condition (bad contact) → Reassemble if abnormality found
No
Check inverter PCB assembly IPM normality → Replace inverter PCB assembly
Yes
Is inverter PCB assembly normal?
Yes Recheck power and installation condition
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
64
Multi-split: Inverter FM..AH
FM27AH t/m FM57AH Display code
Title
26
DC Compressor Position
Cause of error
• Compressor Starting fail error
4. Trouble Shooting Check point & Normal condition
• Check the connection of comp wire “U,V,W” • Malfunction of compressor • Check the component of “IPM”, detection parts.
■ Error Diagnosis and Countermeasure Flow Chart
Is installation condition normal?
No
1. Check Pipe clogging/distortion 2. Check Covering (Indoor/Outdoor Unit) 3. Check EEV connector assemble condition/normal operation 4. Check refrigerant pressure Reassemble or manage if abnormality found
Yes Are the resistance Between each phase and insulation resistance of Inverter compressor normal?
No
1. Check resistance between each terminal of compressor (1.083~1.123Ω ±5%) 2. Check insulation resistance between compressor terminal and pipe (over 50M ) Replace compressor if abnormality found
Yes Is compressor Wire connection condition normal?
No
1. Check inverter PCB assembly U,V,W connector connection condition 2. Check wire disconnection and wiring 3. Check compressor terminal connection condition (bad contact) Reassemble if abnormality found
No
Check inverter PCB assembly IPM normality Replace inverter PCB assembly
Yes
Is inverter PCB assembly normal?
Yes Recheck power and installation condition
Check Point 1. Check the connection condition of PCB. 2. Check the connection condition of Comp. U,V,W wire. 3. Check the comp resistor and insulation resistance .
WVU
4. Check the IPM.(Refer 106 page) 5. Check the pressure of refrigerant. 6. Check the Service Valve Open.
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
65
Multi-split: Inverter FM..AH
4. Trouble Shooting Display code
27
Title
Cause of error
Check point & Normal condition
1. Overload operation (Pipe clogging/Covering/EEV defect/Ref. overcharge) 2. Compressor damage (Insulation damage/Motor Inverter PCB input damage) current is over100A(peak) 3. Input voltage abnormal (L,N) for 2us 4. Power line assemble condition abnormal 5. Inverter PCB assembly Damage (input current sensing part)
AC Input Instant over Current Error
■ Error Diagnosis and Countermeasure Flow Chart Is installation condition normal?
No
Yes
1.Check Pipe clogging/distortion 2.Check Covering (Indoor/Outdoor Unit) 3.Check EEV connector assemble condition/normal operation 4.Check refrigerant pressure → Reassemble or manage if abnormality found
No
Check L~N phase voltage is 220V ±15% → Check connection condition and wiring if power is abnormal
No
1.Check L,N connection condition 2.Check wire disconnection and wiring → Reassemble if abnormality found
No
1.Check inverter PCB assembly U,V,W connector connection condition 2.Check wire disconnection and wiring 3.Check compressor terminal connection condition(bad contact) → Reassemble if abnormality found
Is input voltage normal?
Yes
Is AC input Wire connection condition normal? Yes Is compressor Wire connection condition normal? Yes
Is inverter PCB assembly normal?
No Check inverter PCB assembly PFCM normality → Replace inverter PCB assembly
Yes Recheck power and installation condition
※ PFCM Moudle checking method ① Set the multi tester to diode mode. ② Check short between input signal pin which are placed below PFC Module ③ Replace PCB assembly if it is short between pins except No.4,5 pins.
Signal pin
CAUTION PFCM module No.4,5 pins are internal short state.
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LGE Internal Use Only
66
Multi-split: Inverter FM..AH
FM27AH t/m FM57AH Display code
Title
Cause of error
28
Inverter DC link high voltage error
Inv PCB DC link voltage supplied over 420V
4. Trouble Shooting Check point & Normal condition
1. Input voltage abnormal (L~N) 2. ODU inverter PCB damage(DC Link voltage sensing part)
■ Error Diagnosis and Countermeasure Flow Chart No Is input voltage normal ?
Check L~N Voltage is 220V±15%
Yes Is Inverter PCB assembly Power connection normal?
No
Check connection from terminal block to Inverter PCB assembly CN(L), CN(N)
Yes No Is Inverter PCB Normal?
Replace inverter PCB assembly
Recheck power and installation condition
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LGE Internal Use Only
67
FM27AH t/m FM57AH 4. Trouble Shooting
Multi-split: Inverter FM..AH
Check Point 1. Check the CN_(L),CN_(N) Connection condition at the Inverter PCB.(Refer to outdoor wiring diagram) 2. Check the DC Link voltage at not operating(280V↑ ) 3. Check the DC Link voltage at Comp operating(340V↑ ) 4. Check DC Link Sensing Signal : 2.4~2.8V (Refer the Picture)
< Input Power Source Check Point > 27/30/40k
Vdc < Main PCB>
Vdc
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68
Multi-split: Inverter FM..AH
FM27AH t/m FM57AH
4. Trouble Shooting
48/56k Vdc
N GND
< Inverter PCB>
L
Vdc
DC_LINK GND
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
69
Multi-split: Inverter FM..AH
4. Trouble Shooting Display code
29
Title
Inverter compressor over current
Cause of error
Check point & Normal condition
1. Overload operation (Pipe clogging/Covering/EEV defect/Ref. overcharge) Inverter compressor input 2. Compressor damage(Insulation damage/Motor current is over 30A damage) 3. Input voltage low 4. ODU inverter PCB assembly damage
■ Error Diagnosis and Countermeasure Flow Chart Is installation condition normal?
No
Yes Are the resistance Between each phase and insulation resistance of Inverter compressor normal?
No
1. Check Pipe clogging/distortion 2. Check Covering (Indoor/Outdoor Unit) 3. Check EEV connector assemble condition/normal operation 4. Check refrigerant pressure → Reassemble or manage if abnormality found 1. Check resistance between each terminal of compressor (0.188 ±7%) 2. Check insulation resistance between compressor terminal and pipe (over 50MΩ ) → Replace compressor if abnormality found
Yes Is compressor Wire connection condition normal?
No
1. Check inverter PCB assembly U,V,W connector connection condition 2. Check wire disconnection and wiring 3. Check compressor terminal connection condition (bad contact) → Reassemble if abnormality found
Yes
Is input voltage normal?
No
Check L~N phase is 220V ±15% → Check connection condition and wiring if power is abnormal
No
Check inverter PCB assembly IPM normality → Replace inverter PCB assembly
Yes
Is inverter PCB assembly normal?
Yes Recheck power and installation condition
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
70
Multi-split: Inverter FM..AH
4. Trouble Shooting Display code
Title
32
D-pipe (Inverter) temp. high (105°C↑ )
33
D-pipe (Constant) temp. high (105°C↑ )
Cause of error
Check point & Normal condition
• Discharge sensor (Inverter) temp. high
• Check the discharge pipe sensor for INV. • Check the install condition for over load. • Check the leakage of refrigerant. • Check the SVC V/V open.
• Discharge sensor (Cons.) temp. high
• Check the discharge pipe sensor for Cons. • Check the install condition for over load. • Check the leakage of refrigerant. • Check the SVC V/V open.
D-Pipe temp. Toff(105) °C T2(95) °C T1(90) °C
COMP Frequency Normal (Hz) LEV Openness (Pulse)
Normal
Normal
OFF
Normal
OFF Control
Check Point • CH 32
• CH 33
1. Check the install condition for over load.
1. Check the install condition for over load.
2. Check the SVC V/V open.
2. Check the SVC V/V open.
3. Check the leakage of refrigerant.
3. Check the leakage of refrigerant. 4. Check the constant compressor. (same with CH21)
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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71
Multi-split: Inverter FM..AH Display code
Title
39
Transmission Error Between (PFC Micom → INV Micom)
Cause of error
4. Trouble Shooting Check point & Normal condition
1. Micom defect/Circuit defect 2. Different Micom S/W Version 3. ODU inverter PCB assembly damage
Communication Error Between PFC Micom and INV Micom.
■ Error Diagnosis and Countermeasure Flow Chart
Is PFC Micom & INV Micom S/W Program normal?
No
Upgrade Micom Program
Yes
Is Inverter PCB assembly normal?
No
Replace inverter PCB assembly
Yes
Recheck power and installation condition
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
72
Multi-split: Inverter FM..AH
FM15AH t/m FM25AH 4. Trouble Shooting Display code
40
Title
C/T Sensor Error
Cause of error
Check point & Normal condition • Malfunction of current detection circuit. (Open / Short) • The voltage of "C01N" Is 4.0Vdc(25A) . • Check CT Sensor output voltage : 2.5Vdc ±5%
• Initial current error
■ Error Diagnosis and Countermeasure Flow Chart Is CT Sensor Output is right?
No
If the CT Sensor output is not 2.5Vdc°æ5% Replace the Inverter PCB
No
Check the input voltage source (Is nomal the offset of R-N,T-N voltage)
Yes
Is input voltage normal? Yes Recheck the Inverter PCB and installation condition
Tester
CT Sensor Output (at the INVERTER PCB)
GND
COMP CURRENT U,V ,W U,V,W
INPUT VOL AGE INV VOLTAGE
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73
Multi-split: Inverter FM..AH
FM27AH t/m FM57AH Display code
Title
C/T Sensor Error
40
4. Trouble Shooting
Cause of error
Check point & Normal condition
• Initial current error
• Malfunction of current detection circuit. (Open / Short) • Check CT Sensor output voltage : 2.5Vdc ±5%
■ Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal ?
No
Check L~N Voltage is 220V±15%
Yes Is Inverter PCB Normal?
No
Replace inverter PCB assembly
Yes Recheck power and installation condition
Check Point 1. Check the Input Voltage (L–N ➔ 220V±10%) 2. Check Input Voltage Sensor output voltage (2.5Vdc±10%)
< Input Power Source Check Point >
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74
4. Trouble Shooting
Multi-split: Inverter FM..AH
FM27AH t/m FM41AH
Vdc
1 2 3
< Inverter PCB>
< CT Sensing Check Point >
FM49AH t/m FM57AH
Vdc
INPUT(CT) GND
< CT Sensing Check Point >
< Inverter PCB>
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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75
Multi-split: Inverter FM..AH
4. Trouble Shooting
Display code
Title
41
D-pipe sensor (Inverter)
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 200KΩ / at 25°C (Unplugged) • Normal voltage : 4.5Vdc / at 25°C (plugged)
44
Air sensor
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 10KΩ / at 25°C (Unplugged) • Normal voltage : 2.5Vdc / at 25°C (plugged)
45
Condenser Pipe sensor
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 5KΩ / at 25°C (Unplugged) • Normal voltage : 2.5Vdc / at 25°C (plugged)
46
Suction Pipe sensor
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 5KΩ / at 25°C (Unplugged) • Normal voltage : 2.5Vdc / at 25°C (plugged)
47
D-pipe sensor (Constant)
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 200KΩ / at 25°C (Unplugged) • Normal voltage : 4.5Vdc / at 25°C (plugged)
65
Heat sink sensor
• Open / Short • Soldered poorly • Internal circuit error
• Normal resistor : 10KΩ / at 25°C (Unplugged) • Normal voltage : 2.5Vdc / at 25°C (plugged)
Cause of error
Check point & Normal condition
Check Point 1. Estimate the resistance of each sensor.(Unplugged) 2. Estimate the voltage of each sensor.(Plugged) 3. If the resistance of the sensor is 0 kΩ or ∞, then sensor is abnormal.
Ω
If the voltage of the sensor is 0 V or 5Vdc, then sensor is abnormal.
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
76
Multi-split: Inverter FM..AH
FM15AH t/m FM25AH 4. Trouble Shooting Display code
Title
51
Over capacity
60
EEPROM Check sum
Cause of error
Check point & Normal condition
• Over capacity Combination
• Check the indoor unit capacity. • Check the combination table.
• Check sum error
• Check the PCB ASM P/No. • Check the poor soldering.
Model
Gross max. capacity
A2UW146FA3
21k
Max. single indoor unit capacity
A2UW166FA0 A2UW166FA1
24k
12k
A3UW186FA0 A3UW216FA3 A4UW246FA3
33k
18k
Check Point • CH 51
• CH 60
1. Check the indoor unit capacity.
1. Check the insertion condition of EEPROM. 2. Check the poor soldering
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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77
Multi-split: Inverter FM..AH
FM41 t/m FM57AH 4. Trouble Shooting Display code
Title
51
Over capacity
• Over capacity
• Check the indoor unit capacity. • Check the combination table.
60
Over capacity
• Check sum error
• Check the PCB ASM P/No. • Check the poor soldering.
Cause of error
Model
Gross Max. Capacity[Btu/h]
A7UW428FA3
54k
A8UW488FA3
62k
A9UW548FA3
73k
Check point & Normal condition
Max. Single Indoor Unit Capacity[Btu/h] 24k
Check Point • CH 51
• CH 60
1. Check the indoor unit capacity.
1. Check the insertion condition of EEPROM. 2. Check the poor soldering
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
78
Multi-split: Inverter FM..AH Display code
Title
Cause of error
52
Transmission error between (Inverter PCB ➔ Main PCB)
Main controller of Master unit of Master unit can’t receive signal from inverter controller
4. Trouble Shooting Check point & Normal condition
1. Power cable or transmission cable is not connected 2. Defect of outdoor Main fuse/Noise Filter 3. Defect of outdoor Main / inverter PCB
■ Error diagnosis and countermeasure flow chart Is transmission LED (Yellow) of inverter compressor PCB on?
No
Is noise filter or fuse normal?
No
Replace noise filter or fuse
Yes
Yes
Replace inverter compressor PCB
Is transmission cable connected correctly?
No Re-connect transmission cable
Yes
No Is MAIN PCB normal?
Replace MAIN PCB
Yes
Replace inverter compressor PCB
Check Point - Check the Transmission connector and LED (Main & Inverter)
48/56k
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 93 -
LGE Internal Use Only
79
Multi-split: Inverter FM..AH Display code
Title
54
3-phase wrong wiring of main outdoor unit
Cause of error
4. Trouble Shooting Check point & Normal condition
• 3-phase wrong wiring of outdoor unit (Reverse Phase /omission of phase)
• Abnormal Main PCB • No connection of CN_Phase • Changed R, S, T connection order
■ Error Diagnosis and Countermeasure Flow Chart No
Is PCB connection Normal? Yes
No
Is input voltage normal ? Yes
1. Check the Connection condition of PCBs 1) Input &Output (R,S,T,N) wire Connection of Noise Filter. 2) Check reverse connecting and non connecting for CN-L1(R), CN-L2(S), CN-L3(T) of the Inverter PCB 3) Check the CN-AC-220V Connector of the Inverter PCB and T-N connector of the Noise Filter 2. Check the connection or damage of power source fuses.
R~S/S~T/T~R phase voltage is 380V °æ 10% R~N/S~N/T~N phase voltage is 220V °æ10% Check connection condition and wiring if power is abnormal.
Recheck power and installation condition
T-N R
S
T
N
R
S
T
Fuse
R S T
N
R
G
S T
N
CN-L3(T) CN-L1(R) CN-AC-220V
CN-L2(S)
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 119 -
LGE Internal Use Only
80
FM27AH t/m FM57AH 4. Trouble Shooting Display code
60
Multi-split: Inverter FM..AH
Title
Cause of error
Check point & Normal condition 1. EEPROM contact defect/wrong insertion 2. Different EEPROM Version 3. ODU Inverter & Main PCB assembly damage
Inverter PCB & Main EEPROM Access error EEPROM check sum error and Check SUM error
■ Error Diagnosis and Countermeasure Flow Chart
Is EEPROM insertion normal?
No
1.Check EEPROM insert direction/connection condition 2.Check EEPROM Check SUM → Replace if abnormality found
Yes
Is inverter PCB assembly normal?
No
Replace inverter PCB assembly
Yes
MAIN PCB assembly normal?
No
Replace MAIN PCB assembly
Yes Recheck power and installation condition
Check Point - Check the EEPROM Check sum & Direction
27/30/40k
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 94 -
LGE Internal Use Only
81
Multi-split: Inverter FM..AH
4. Trouble Shooting
FM49AH t/m FM57AH
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 95 -
LGE Internal Use Only
82
Multi-split: Inverter FM..AH
4. Trouble Shooting Display code
Title
Cause of error
61
Condenser pipe sensor temp. high
• Condenser pipe sensor detected high temp.(65°C)
62
Heat sink sensor temp. high
Check point & Normal condition
• Check the load condition. • Check the sensor of Condenser pipe sensor.
• Heat sink sensor detect- • Check the Heat sink sensor (10kΩ ±10% at 25°C) ed high temp.(85°C) • Check that outdoor fan is driving rightly
Gd`sRhmjပ Snee
8/°C
S1
74°C
S0
7/°C
ქኩ༯ ZGy\
Ⴓ ໎ཙ ქኩ༯ ხᄅ
α Gy Cnvm
ጒ ხᄅ
α Gy Cnvm
NEE
α Gy Cnvm
Ⴓ ქኩ༯
Comp frequecy control accoding to heatsink temp.
■ Comp frequency control according to heat sink temp. Is normal heatsink sensor connecting ?
No
Connect the heatsink sensor right
Yes Is normal heatsink sensor ? (10kΩ ±10% at 25°C)
No
Replace the heatsink sensor
Yes
Is normal Inverter PCB ?
No
Replace the heatsink sensor
Yes Recheck power and installation condition
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 120 -
LGE Internal Use Only
83
4. Trouble Shooting Display code
65
Multi-split: Inverter FM..AH
Title
Heatsink High error
Cause of error
Inverter PCB heatsink sensor is open or short
Check point & Normal condition 1. ODU fan locking 2. Heatsink assembly of INV PCB assemble condition abnormal 3. Defect of temperature sensing circuit part defect of INV PCB
■ Error Diagnosis and Countermeasure Flow Chart
Is installation condition normal ?
No
1. Check fan locking 2. Check covering of heat exchanger 3. Check distance between ODU and obstacles 4. Check pipe distortion and abnormality 5. Check service valve is opened → Eliminate causes for abnormal condition
Yes
Is assemble condition of INV PCB heatsink normal ?
No
Check assemble condition between INV PCB heatsink and PFC & IPM module → Reassemble if abnormality found
Yes
Is PCB temperature sensing part normal ?
No
Check resistance between NO.19 pin and NO.20 pin of PFC module Check resistance between NO.24 pin and NO.25 pin of PFC module → 7KΩ ±10%(at 25°C) → Replace PCB if abnormality found
Check Point 1. Check resistance between No.19 pin and NO.20 pin of PCB PFC module 2. Check resistance between No.24 pin and NO.25 pin of PCB PFC module - only 48/56k 3. Resistance value should be in 7kΩ ±10%.(at 25°C). 4. Check the PFC Module No.19, 20 and IPM Module No.24, 25 pin soldering condition.
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 98 -
LGE Internal Use Only
84
Multi-split: Inverter FM..AH
4. Trouble Shooting
FM27AH t/m FM40AH
PFCM : Measuring resistance between No.19,20 pin
FM49AH t/m FM57AH
PFCM : Measuring resistance between No.19,20 pin
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 99 -
IPM : Measuring resistance between No.24,25 pin
LGE Internal Use Only
85
Multi-split: Inverter FM..AH
FM15AH t/m FM25AH
4. Trouble Shooting
Display code
Title
Cause of error
Check point & Normal condition
67
Outdoor fan lock
• Outdoor fan is not operating
• Check the fan condition. • Check the fan connector • Check the fan control part of the INVERTER PCB
■ Error Diagnosis and Countermeasure Flow Chart CH67(Outdoor fan lock) occurrence
Is fan connector condition right ?
No
Do right fan connector condition
Yes
No
Is Fan motor nomal?
Change abnomal motor
Yes Replace inverter PCB assembly
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 121 -
LGE Internal Use Only
86
FM27AH t/m FM57AH 4. Trouble Shooting Display code
67
Multi-split: Inverter FM..AH
Title
Fan Lock Error
Cause of error
Check point & Normal condition
1. ODU fan locking Fan RPM is 10RPM or 2. Heatsink assembly of INV PCB assemble condiless for 5 sec. when ODU tion abnormal fan starts or 40 RPM or 3. Defect of temperature sensing circuit part defect less after fan starting. of INV PCB
■ Error Diagnosis and Countermeasure Flow Chart Is ODU Fan Motor Assemble condition normal?
No
Check ODU Fan Motor assemble condition and fan locking → Reassemble or replace if abnormality found
No
1. Set the multi tester to diode mode. 2. Check voltage between 1pin and 4pin of Fan Motor (1±0.2V) 3. Replace Inverter PCB if abnormality found.
Yes
Is ODU Fan Motor normal?
Yes
Is wire connection of ODU Fan Motor wire normal?
No
Check wiring between OUD fan motor and Inverter PCB ( Check if Hall Senor and Motor output terminal color is matched) → Reassemble if abnormality found
Yes
Is Inverter PCB assembly normal?
No
Replace Inverter PCB assembly
Yes Recheck power and installation condition
Check Point 1. Check voltage between 1pin and 4pin of Fan Mortor connector (Tester diode mode) 2. Voltage vaule should be in 1V ±0.2V.
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 100 -
LGE Internal Use Only
87
Multi-split: Inverter FM..AH
4. Trouble Shooting
FM27AH t/m FM41AH Check voltage betwen 1pin and 4pin of fan motor
Fan motor connector Tester
FM49AH t/m FM57AH
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 101 -
LGE Internal Use Only
88
Multi-split: Inverter FM..AH
4. Trouble Shooting Display code
73
Title
AC input instant over current error (Matter of software)
Cause of error
Check point & Normal condition
Inverter PCB input power current is over 48A(peak) for 2ms
1. Overload operation (Pipe clogging/Covering/EEV defect/Ref.overcharge) 2. Compressor damage (Insulation damage/Motor damage) 3. Input voltage abnormal (L, N) 4. Power line assemble condition abnormal 5. Inverter PCB assembly damage (input current sensing part)
■ Error Diagnosis and Countermeasure Flow Chart Is installation condition normal?
No
Yes
1.Check Pipe clogging/distortion 2.Check Covering (Indoor/Outdoor Unit) 3.Check EEV connector assemble condition/normal operation 4.Check refrigerant pressure → Reassemble or manage if abnormality found
No
Check L~N phase voltage is 220V ± 10% → Check connection condition and wiring if power is abnormal
No
1.Check L,N connection condition 2.Check wire disconnection and wiring → Reassemble if abnormality found
No
1.Check inverter PCB assembly U,V,W connector connection condition 2.Check wire disconnection and wiring 3.Check compressor terminal connection condition(bad contact) → Reassemble if abnormality found
Is input voltage normal?
Yes
Is AC input Wire connection condition normal? Yes
Is compressor Wire connection condition normal? Yes
Is inverter PCB assembly normal?
No Check inverter PCB assembly IPM normality → Replace inverter PCB assembly
Yes Recheck power and installation condition
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 102 -
LGE Internal Use Only
89
Multi-split: Inverter FM..AH
4. Trouble Shooting
27/30/40k
N
L
< Noise Filter wiring Check Point >
N L
< Main PCB wiring Check Point >
< Input Power Source Check Point >
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 103 -
LGE Internal Use Only
90
Multi-split: Inverter FM..AH
4. Trouble Shooting 48/56k
N
L
< Noise Filter wiring Check Point >
L
N
N L
< Input Power Source Check Point >
Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
< Inverter PCB wiring Check Point >
- 104 -
LGE Internal Use Only
91
LG
Multi-split Variabel (aan/uit) M..AC/AH
92
Multi-split: Aan / Uit M..AC / AH
Functions
Signal Receptor Receives the signals from the remote controller.(Signal receiving sound: two short beeps or one long beep.) Operation Indication Lamps : Lights up during the system operation. : Lights up during Sleep Mode Auto operation. : Lights up during Timer operation. : Lights up during Defrost Mode or Hot Start operation (Heat pump model only) : Lights up during outdoor unit operation. (Cooling model only)
On/Off Sleep Mode Timer Signal receptor
Defrost Mode
OUT OUTDOOR UNIT DOOR OPERATION
Operation indication lamps
Receives the signals from the remote controller.(Signal receiving sound: two short beeps or one long beep.) Operation Indication Lamps : Lights up during the system operation. : Lights up during Sleep Mode Auto operation. Timer : Lights up during Timer operation. Defrost Mode : Lights up during Defrost Mode or Hot Start operation.(Heat pump model only) Outdoor unit operation : Lights up during outdoor unit operation.(Cooling model only) PLASMA : Indicate PLASMA purifier operation. On/Off
Sleep Mode
Operation indication lamps
Self-diagnosis Function ■ Error Indicator • The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble. • Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table. • If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed. • After error occurrence, if error is released, error LED is also released simultaneously. • To operate again on the occurrence of error code, be sure to turn off the power and then turn on. • Having or not of error code is different from Model. Error Code
1 2 5
Error LED (Indoor body operation LED) 5sec
(once) 3sec
3sec
3sec
(twice) 3sec
3sec (5times)
(6times) 3sec (7times)
7
• Indoor air temperature thermistor open/short.
• Indoor air TH ass'y check
• Indoor inlet pipe temperature thermistor open/short.
• Indoor inlet pipe TH ass'y check
• Poor communication
• Communication line/circuit
• Indoor outlet pipe temperature thermistor open/shor
• Indoor outlet pipe TH ass'y check
• Defferent Operation (Simultanueous operation of cooling and heating.
• Operate indoor units only heating or cooling mode.
3sec
• Indoor EEP ROM data (Art type only)
• Replace main PCB DC ASM
• Outdoor air temperature thermistor open/short
• Outdoor air TH ass'y check
• Outdoor pipe themperature thermistor open/short
• Outdoor pipe TH ass'y check
• Overload combination
• Indoor unit combination check (Refer to Max. capacity)
(9times)
9
3sec
3sec
3sec
45 3sec
51
SVC check point
3sec
6
44
Error contents
3sec
3sec
: ten digits : one digits
93
Multi-split Multi-split tot 2005 A2-C.. A3-C.. A2-H.. A3-H.. LM..
94
Multi-split: Aan / Uit voor 2005 (modellen, zie pag. 105)
Display Function 1. Heating Model
2. Cooling Model Operation Indicator
Operation Indicator • Cooling, Soft Dry, Fan, Heating
• Cooling, Soft Dry, Fan
Sleep Timer Indicator
Sleep Timer Indicator
• Sleep Mode
• Sleep Mode Timer Indicator
Timer Indicator • Timer Mode
• Timer Mode Compressor on Indicator
Defrost Indicator
OUT DOOR
• Hot-start, Defrost
Self-diagnosis Function ■ Error Indicator • The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble. • Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table. • If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed. • After error occurrence, if error is released, error LED is also released simultaneously. • To operate again on the occurrence of error code 12, be sure to pull out power cord and then re-insert. • Having or not of error code is different from Model. Error Code
1 2
Error LED (Indoor body operation LED)
Error contents
• Indoor suction temperature thermistor open/short. • Indoor TH ass'y check • Indoor pipe temperature thermistor open/short. • Outdoor suction temperature thermistor open/short. • Outdoor TH ass'y • Outdoor pipe temperature check thermistor open/short. • Abnormal operation of multi product. • Resetting of remocon (Simultanueous operation of operating mode cooling and heating)
(once) 3sec (twice)
3sec
3sec (3times)
3sec
3sec
3 3sec (5times)
3sec
• Poor communication
5 (once)
3sec (twice)
(once)
12 3sec
3sec
3sec
SVC check point
(twice)
• Communication line/circuit check
• Primarily check • Misconnection of connecting refrigerant pressure cables • Connecting pipe check • Connecting cable check
95
LG
RAC Standaard wandunit (aan/uit & Inverter) Art Cool Deluxe (aan/uit & Inverter) (hoge wand) Art Cool Panel (aan/uit & Inverter)
96
RAC Standaard wandunit (aan/uit) Alle typen/uitvoeringen o.a: LS-J.. / LS-K.. / LS-L.. S..ACL / S..AH / S..ACP / S..AHP G..AH
ART COOL Panel / Deluxe (aan/uit) LS-P.... .. A09/12/18AH* C07/09/12AH*
97
RAC: AAN / UIT Standaard wandunit, Panel & Deluxe
Operation
Display Function 1. Heating Model
2. Cooling Model Operation Indicator
Operation Indicator • Cooling, Soft Dry, Fan, Heating
• Cooling, Soft Dry, Fan Compressor on Indicator
Deicer Indicator
OUT DOOR
• Hot-start, Deice
Self-diagnosis Function Error Code 1
Error Display LED (Indoor body operation LED) (once) 3sec
3sec
3sec
Error contents • Indoor room temperature thermistor open/short • Indoor pipe temperature thermistor open/short.
SVC check point • Indoor Thermistor assembly check
98
LG
RAC Standaard wandunit Inverter LS-N.... LS-Q.... LS-R.... S..AN S..AW
99
RAC: Wandunit Inverter LS-N/Q/R, S..AN & S..AW
Troubleshooting Guide
Self-diagnosis function 1. The malfunction indicator of indoor (see the operating LED of the INDOOR) Error Code
The cause of malfunction
Malfunction indicator
The operating state
Indoor TH. is short or open.
The operating LED will be blinking once.
Keep operating state.
Outdoor TH. is short or open.
The operating LED will be blinking twice.
Keep operating state.
4
Temp. of Heat sink is over 95°C. /Heat sink TH. is short or open.
The operating LED will be blinking 4 times.
Restart compressor when Heat sink Temp is 85°C below.
5
Comunication error (serial comunication).
The operating LED will be blinking 5 times.
The operation is off(enable to restart by remote controller).
DC peak error.
The operating LED will be blinking 6 times.
Compressor will be turned off immediately. (not enable to restart by remote controller)
7
Running current is overloaded. (CT2)
The operating LED will be blinking 7 times.
Compressor will be turned off immediately. (not enable to restart by remote controller)
8
Indoor fan lock error (BLDC fan model)
The operating LED will be blinking 8 times.
The operation is off(enable to restart by remote controller).
9
Outdoor fan lock error (BLDC fan model)
The operating LED will be blinking 9 times.
The operation is off(enable to restart by remote controller).
D-PIPE TH is short or open.
The operating LED will be blinking 10 times.
Compressor will be turned off immediately. (restart compressor when D-PIPE TH. is recovred)
1
2
6
10
❈ Error code ➅, ➆ can’t be operated unless the power cord is removed.
2. The malfunction indicator of outdoor (see the LED01M on the outdoor PCB ass’y) Error Code
The cause of malfunction
Malfunction indicator
Indoor TH. is short or open.
The LED01M will be blinking twice.
Keep operating state.
4
Temp. of Heat sink is over 95°C, or Heat sink TH. is shortor open.
The LED01M will be blinking 4 times.
Restart compressor when heat sink Temp. is 85°C below.
5
Comunication error (serial comunication).
The LED01M will be blinking 5 times.
The operation is off(enable to restart by remote controller).
DC peak error.
The LED01M will be blinking 6 times.
Compressor will be turned off immediately. (not enable to restart by remote controller)
7
Running current is overloaded.
The LED01M will be blinking 7 times.
Compressor will be turned off immediately. (not enable to restart by remote controller)
9
Outdoor fan lock error (BLDC fan model)
The LED01M will be blinking 9 times.
The operation is off(enable to restart by remote controller).
D-PIPE TH is short or open.
The LED01M will be blinking 10 times.
Compressor will be turned off immediately. (restart compressor when D-PIPE TH. is recovered)
2
6
10
The operating state
100
RAC ART COOL Deluxe Inverter C09AW* C12AW*
101
RAC: ART COOL Inverter C09AW* & C12AW*
Troubleshooting Guide
Self-diagnosis function 1. The malfunction indicator of indoor (see the operating LED of the INDOOR) Error Code
The cause of malfunction
Malfunction indicator
The operating state
Indoor TH. is short or open.
The operating LED will be blinking once.
Keep operating state.
Outdoor TH. is short or open.
The operating LED will be blinking twice.
Keep operating state.
4
Temp. of Heat sink is over 95°C. /Heat sink TH. is short or open.
The operating LED will be blinking 4 times.
Restart compressor when Heat sink Temp is 85°C below.
5
Comunication error (serial comunication).
The operating LED will be blinking 5 times.
The operation is off(enable to restart by remote controller).
DC peak error.
The operating LED will be blinking 6 times.
Compressor will be turned off immediately. (not enable to restart by remote controller)
7
Running current is overloaded. (CT2)
The operating LED will be blinking 7 times.
Compressor will be turned off immediately. (not enable to restart by remote controller)
8
Indoor fan lock error (BLDC fan model)
The operating LED will be blinking 8 times.
The operation is off(enable to restart by remote controller).
9
Outdoor fan lock error (BLDC fan model)
The operating LED will be blinking 9 times.
The operation is off(enable to restart by remote controller).
D-PIPE TH is short or open.
The operating LED will be blinking 10 times.
Compressor will be turned off immediately. (restart compressor when D-PIPE TH. is recovred)
1
2
6
10
❈ Error code ➅, ➆ can’t be operated unless the power cord is removed.
2. The malfunction indicator of outdoor (see the LED01M on the outdoor PCB ass’y) Error Code
The cause of malfunction
Malfunction indicator
Indoor TH. is short or open.
The LED01M will be blinking twice.
Keep operating state.
4
Temp. of Heat sink is over 95°C, or Heat sink TH. is shortor open.
The LED01M will be blinking 4 times.
Restart compressor when heat sink Temp. is 85°C below.
5
Comunication error (serial comunication).
The LED01M will be blinking 5 times.
The operation is off(enable to restart by remote controller).
DC peak error.
The LED01M will be blinking 6 times.
Compressor will be turned off immediately. (not enable to restart by remote controller)
7
Running current is overloaded.
The LED01M will be blinking 7 times.
Compressor will be turned off immediately. (not enable to restart by remote controller)
9
Outdoor fan lock error (BLDC fan model)
The LED01M will be blinking 9 times.
The operation is off(enable to restart by remote controller).
D-PIPE TH is short or open.
The LED01M will be blinking 10 times.
Compressor will be turned off immediately. (restart compressor when D-PIPE TH. is recovered)
2
6
10
The operating state
102
LG
RAC ART COOL Deluxe Inverter C18AW* C24AW*
103
RAC: ART COOL Inverter C18AW* & C24AW*
Troubleshooting Guide
Self-diagnosis function 1. The malfunction indicator of indoor (see the operating LED of the INDOOR) Error Code
The cause of malfunction
Malfunction indicator
The operating state
Indoor TH. is short or open.
The display show "C1"
Keep operating state.
Outdoor TH. is short or open.
The display show "C2"
Keep operating state.
4
Temp. of Heat sink is over 95°C. /Heat sink TH. is short or open.
The display show "C4"
Restart compressor when Heat sink Temp is 85°C below.
5
Comunication error (serial comunication).
The display show "C5"
The operation is off(enable to restart by remote controller).
DC peak error.
The display show "C6"
Compressor will be turned off immediately. (not enable to restart by remote controller)
7
Running current is overloaded. (CT2)
The display show "C7"
Compressor will be turned off immediately. (not enable to restart by remote controller)
8
Indoor fan lock error (BLDC fan model)
The display show "C8"
The operation is off(enable to restart by remote controller).
9
Outdoor fan lock error (BLDC fan model)
The display show "C9"
The operation is off(enable to restart by remote controller).
D-PIPE TH is short or open.
The display show "CA"
Compressor will be turned off immediately. (restart compressor when D-PIPE TH. is recovred)
1
2
6
10
❈ Error code ➅, ➆ can’t be operated unless the power cord is removed.
2. The malfunction indicator of outdoor (see the LED01M on the outdoor PCB ass’y) Error Code
The cause of malfunction
Malfunction indicator
Indoor TH. is short or open.
The LED01M will be blinking twice.
Keep operating state.
4
Temp. of Heat sink is over 95°C, or Heat sink TH. is shortor open.
The LED01M will be blinking 4 times.
Restart compressor when heat sink Temp. is 85°C below.
5
Comunication error (serial comunication).
The LED01M will be blinking 5 times.
The operation is off(enable to restart by remote controller).
DC peak error.
The LED01M will be blinking 6 times.
Compressor will be turned off immediately. (not enable to restart by remote controller)
7
Running current is overloaded.
The LED01M will be blinking 7 times.
Compressor will be turned off immediately. (not enable to restart by remote controller)
9
Outdoor fan lock error (BLDC fan model)
The LED01M will be blinking 9 times.
The operation is off(enable to restart by remote controller).
D-PIPE TH is short or open.
The LED01M will be blinking 10 times.
Compressor will be turned off immediately. (restart compressor when D-PIPE TH. is recovered)
2
6
10
The operating state
104
RAC ART COOL Panel Inverter A09AW A12AW A09AW1 A12AW1
105
RAC: ART COOL PANEL Inverter A..AW & A..AW1
Troubleshooting Guide
Self diagnosis Function Error Code 1 time
1
Cause of Error
Error Indicator 1time
3 sec
1time
3 sec
1time
3 sec
1time
3 sec 2 times
2 times
2 times
2 times
3 sec
3 sec
3 sec
2
4
5
4 times
4 times
3 sec
3 sec
5times
5times
3 sec
3 sec
6times
6
6times
3 sec
3 sec 8times
8
8times
3 sec
9times
9
9times
3 sec
10 times 10 times
10
3 sec
1time
12
2times
1time
3 sec
1time
13
1time
4 times 3 sec
• Outdoor Temp. sensor error - Sensor open or short
O
O
ON
• Heat Sink sensor error - Sensor open or short - Heat Sink temp is over 95 °…
O
O
ON
O
O
OFF
• DC Peak error
O
O
SHUT DOWN
• Over current error (CT2)
O
O
SHUT DOWN
• Indoor fan lock error (BLDC fan model only)
O
• Outdoor fan lock error (BLDC fan model only)
O
O
OFF
• D-Pipe TH. is short or open.
O
O
ON
• Communication error
ON
1time
OFF
O
ON
3 times
• PSC Error - PSC Fault Error
O
ON
4 times
• Comp Phase Current Error (180 Driver Comp Control Model Only)
O
ON
3 sec
3 times
O
• EEPROM Error - EEPROM Check sum Error
3 sec
1time
14
2times
Indoor Operation
• Indoor Temp. sensor error - Sensor open or short
7times
7times
7
Display Indoor Outdoor
106
RAC: ART COOL PANEL Inverter A..AW & A..AW1
Troubleshooting Guide
Troubleshooting for error code Error code
Description
1
Indoor TH. is short or open
Check flow
Cause of error • Indoor TH. (sensor) is short or open • Indoor TH. (sensor) is not connected to the indoor pcb assembly • Damage or defect on the sensing circuit of indoor pcb assembly. (R01H, R02H, R03H, R04H, C01H, C02H)
YES
Indoor TH. is connected to Indoor pcb assembly ?
YES Sensing circuit of indoor pcb is right ?
Indoor TH. is right ?
No
No Check Indoor TH. - Measure resistance of TH. (air : about 10k . at 25 °C, pipe : about 5k . at 25 °C)
- Connect to CN-TH1 in indoor pcb assembly
Error code
Description
2
Outdoor TH. is short or open
Check flow Outdoor TH. is connected to outdoor pcb assembly ? No
- Connect to CN-TH1 in outdoor pcb assembly
No
- Check soldering state of R01H ~ R04H, C01H, C02H
Cause of error • Outdoor TH. (sensor) is short or open • Outdoor TH. (sensor) is not connected to the outdoor pcb assembly • Damage or defect on the sensing circuit of outdoor pcb assembly. (R03H~R06H, C02H, C03H)
YES
YES Outdoor TH. is right ? No Check outdoor TH. - Measure resistance of TH. (air : about 10k . at 25 °C, pipe : about 5k . at 25 °C)
Sensing circuit of outdoor pcb is right ? No
- Check soldering state of R03H ~ R06H, C02H, C03H
107
Troubleshooting Guide
RAC: ART COOL PANEL Inverter A..AW & A..AW1
• 9K / 12K Description
Error code
4
Cause of error
Heat-sink Temp. is over 95°C Heat-sink TH. is open or short
Check flow Heat-sink TH is connected to outdoor PCB assembly? No
- Connect to CN-TH2 in outdoor PCB assembly
• Heat-sink TH. is damaged(short or open). • Heat-sink Temp. is over 95°C • Damage or defect on the sensing circuit of outdoor pcb assembly. (R01H, R02H, C01H)
YES
YES Heat-sink TH. in INV-IC is Right ? No
Check heat-sink TH. - Measure resistance of TH. (about 10k . at 25 °C)
Sensing circuit of outdoor pcb is right ? No
- Check soldering state of R01H, R02H, C01H
108
RAC: ART COOL PANEL Inverter A..AW & A..AW1 Description
Error code
5
Cause of error • Wrong or missing wiring between indoor and outdoor unit cable • Defect of communication components in indoor pcb assembly • Defect of communication components in outdoor pcb assembly • Defect of power supply components in outdoor pcb assembly • No ground connection in air conditioner unit (affected by noise in power source)
Communication Error
Check flow
YES
No Indoor 1(BR) 2(BL) 3(GN/YL) 4(RD)
YES Is the voltage of T/Block , in outdoor about AC 220/240V ?
Wiring connection Is right ?
Is the voltage of GND & DC5V in Outdoor pcb about DC 5V ?
No Outdoor 1(BR) 2(BL) 3(GN/YL) 4(RD)
Troubleshooting Guide
No
Check power connector Is not connected to the T/Block in indoor unit.
YES
Check FUSE, NF01/02J, PTC, Power Module, BD-01S in Outdoor pcb assembly
YES Communication circuit of indoor & outdoor pcb Is right ? No
Check IC01K, IC02K,D01K~D03K, ZD01K~ZD03K, R01K~R10K, C01K~C04K
Ground connection is installed ? (power outlet or outdoor chassis) No
Earth port
Install ground connection from outdoor unit. (In case power outlet has no earth port)
109
RAC: ART COOL PANEL Inverter A..AW & A..AW1
Troubleshooting Guide Error code
Cause of error
Description
6
DC Peak Error
Check flow
• Supplied power is not normal • Comp Connector (CN-U,V,W) is disconnected or inserted to wrong position • Compressor is damaged (coil short) ➔ replace compressor • Too much Refrigerant • Defect in outdoor pcb assembly ➔ replace pcb assembly
YES
Supplied voltage to Outdoor pcb is about AC 220/240V ?
YES Is connector (CN-U,V,W) connected to compressor and inserted to pcb in right position ?
No
Refrigerant pressure is right ?
No
No
Check CN-U,V,W connector (U : RD, V : BL, W : YL)
Check power source
YES
Check refrigerant pressure and adjust.
YES Inverter components in outdoor right ?
Is the compressor right ? No
No
Check resistance Between U-V, V-W, U-W port. → Short / Open circuit (Comp.motor coil error) → normal : 1 ~2 . Between U,V,W and Body °Ê normal : over10M .
* 9 K/12K Model Check Short of SPM3 pins (GND - P, U, V, W pin) Direction of D01Z~D03Z, C08Z,10Z,12Z,16Z Assembling state of R01P ~ R21P & IC01P Assembling state of screw between INV-IC & Heat-sink DC 15V output of Power module.
U . V
W
pcb assembly are
* 18 K Model Check Short of SPM2 pins (GND – P, U, V, W pin) Direction of D01Z~D03Z, C08Z,10Z,12Z,16Z Assembling state of R01P ~ R21P & IC01P Assembling state of screw between INV-IC & Heat-sink DC 15V output of Power module.
110
RAC: ART COOL PANEL Inverter A..AW & A..AW1 Error code
Description
7
Over current Error (CT2)
Check flow
Cause of error • Supplied power is not normal • Indoor/outdoor fan is locked • Too much refrigerant • Defect in current sensing circuit in outdoor pcb assembly
YES
YES
Supplied voltage to Outdoor pcb is about AC 220/240V ?
Does indoor / outdoor fan work normally ?
No
No Check indoor / outdoor fan and adjust.
Check power source
Troubleshooting Guide
Refrigerant pressure is right ? No Check refrigerant pressure and adjust.
YES Current sensing circuit is right ? No Check current sensing circuit. - check CT is damaged in outdoor pcb (output wire is disconnected to pin or not) - BD01N is inserted in right position (refer marking on pcb and component) - Spec of R01N (1k. ), R02N (1.65k. ) is correct - Direction of diode (D01N, D02N) is right
111
RAC: ART COOL PANEL Inverter A..AW & A..AW1
Troubleshooting Guide Error code
Description
8
Indoor fan is locked (BLDC fan model only)
Check flow
Cause of error • Indoor fan is locked or separated • Fan connector is not connected to indoor pcb assembly • Defective in DC-fan driving circuit
YES
Indoor fan is rotating ? (1)
YES Indoor fan is rotating ? (2)
No
DC–fan driving circuit is right ?
No
Check indoor unit - remove obstacles in indoor unit - fan assembled correctly.
Description
9
Outdoor fan is locked (BLDC fan model only)
Outdoor fan is rotating ? (1) No Check outdoor unit - remove obstacles in outdoor unit
Check DC Fan Driving circuit (Soldering state & Direction) - R01F~R09F, C01F~C03F, IC01F~IC03F, Q01F~Q02F, ZD01F
Check soldering state of CN-Motor1 & assembling state of DC Fan connector
Error code
Check flow
No
Cause of error • Outdoor fan is locked by an obstacle (ex : branch of tree, bar…etc) • Fan connector is not connected to outdoor pcb assembly • Defective in DC-fan driving circuit
YES
YES Outdoor fan is rotating ? (2) No Check connector is not connected to outdoor pcb assembly (CN-FAN2)
DC–fan driving circuit is right ? No Check DC Fan driving circuit (Soldering state & Direction) - R01F~R05F, C01F~C03F, Q01F~Q04F, ZD01F
112
RAC: ART COOL PANEL Inverter A..AW & A..AW1 Error code
10
Description
Cause of error
D-Pipe TH. is short or open
Check flow D_PIPE TH. is connected to Outdoor pcb assembly ? No
Connect to CN-D_PIPE in outdoor pcb assembly
Troubleshooting Guide
• D_pipe TH. is short or open • D_pipe TH. is not connected to the outdoor pcb assembly • Damage or defect on the sensing circuit of outdoor pcb assembly
YES
YES D_PIPE TH. is right ? No
Check D_PIPE TH. - Measure resistance of TH. (about 200k. at 25°C.)
Sensing circuit of outdoor pcb is right ? No
- Check soldering state of R07H, R08H, C04H
113
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