LG MULTI V 5 Manual Book page 66

Error No. Error Type Error Point
105*
Error No. Error Type Error Point
Master
1051
Communication
Communication error
Slave1
Fan controller didn't
Fan controller didn't receive signal
error
1052 (Fan PCB ↔ Inverter
105* receive signal from
from Inverter PCB
Slave2
PCB) (Fan PCB ↔ In-
Inverter PCB
1053
verter PCB)
Slave3
1054
n Error Diagnosis and Countermeasure Flow Chart
No
Is fan PCB communication
1. Check communication cable between Inverter PCB and fan PCB
LED(yellow) blinking
→ Reconnect or replace wire if abnormality found
normally?
Yes
No
Is Inverter PCB
Check communication cable between Inverter PCB and fan PCB
communication LED(yellow)
→ Reconnect or replace wire if abnormality found
blinking normally?
Yes
No
Is fan PCB assembly normal? Fan PCB assembly
Yes
Recheck power and
installation condition
Comp Fan Communication
Connection
Communication Connector
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
130
_TROUBLE SHOOTING GUIDE BOOK
Main Reasons
Main Reasons
1. Wrong connection between Comp and Fan
1. Wrong connection between Comp and Fan
PCB
PCB
2. Fan PCB power not supplied
2. Fan PCB power not supplied
3. ODU Comp/Fan PCB defect
3. ODU Comp/Fan PCB defect
No
Yes
Replace inverter PCB assembly
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LGE Internal Use Only
Error No. Error Type Error Point
Error No. Error Type Error Point
106*
Master
1061
IPM protection circuit
ODU Fan PCB IPM
Slave1
IPM protection circuit activation
ODU Fan PCB
106* activation
1062
Fault
IPM Fault
(over current)
Slave2
(over current)
1063
Slave3
1064
n Error Diagnosis and Countermeasure Flow Chart
No
Is fan motor assemble Check ODU fan motor assemble condition and locking
condition normal? → Reassemble or replace if abnormality found
Yes
1.Check fan motor U,V,W connector connection condition
No
→ Reassemble wire if abnormality found
Is fan motor wire connection
2.Check fan motor wire disconnection
condition normal?
→ Replace ODU fan motor if abnormality found
Yes
1.Check fan PCB connector condition
No
Is fan PCB assemble → Reassemble if abnormality found
condition normal?
2.Check assemble condition between fan PCB and Heatsink
→ Reassemble heatsink if abnormality found
Yes
No
Is fan PCB assembly normal? Replace fan PCB assembly
Yes
Recheck power and
installation condition
Fan Motor Wire connection
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Main Reasons
Main Reasons
1. Overload operation (Pipe clogging/Covering/
1. Overload operation (Pipe clogging/Covering/EEV
EEV defect/Ref. overcharge
defect/Ref. overcharge
2. ODU fan motor assemble condition abnormal
2. ODU fan motor assemble condition abnormal
(Coil disconnection/Short/Insulation damage)
(Coil disconnection/Short/Insulation damage)
3. Fan PCB assembly defect
3. Fan PCB assembly defect
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LGE Internal Use Only
131
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