LG MULTI V 5 Manual Book page 68

Error No. Error Type Error Point
Compressor lowoil Compressor low oil
116*
level error level
Error Diagnosis and Countermeasure Flow Chart
▒
No
Check sensor connection to external
Is oil level sensor connected
properly to PCB? PCB
Yes
Is oil level sensor
No
Check sensor connection to
connected properly to
compressor
compressor?
Yes
Replace oil level sensor
134
_TROUBLE SHOOTING GUIDE BOOK
Main Reasons
Continuous compressor low oil level Oil level
sensor fault
Error No. Error Type
145*
Error No. Error Type Error Point
Master
1451
Communication Error Cycle controller of
Slave1 Communication Cycle controller of Master unit of
between
Master unit of Mas-
1452
Master unit can't receive signal
Error between
(Main PCB → External
145* ter unit can't receive
Slave2
from External controller
(Main PCB →
PCB)
1453
signal from External
External PCB)
Slave3
controller
1454
n Error diagnosis and countermeasure flow chart
Error Diagnosis and Countermeasure Flow Chart
▒
Is communication LED
No
(Yellow) of
Re-connect Power cable
External PCB on?
Yes
No
Is communication cable
Re-connect communication cable
connected correctly?
Yes
No
Is Main PCB normal
Replace Main PCB
Yes
Replace External PCB
* The Method of checking Main PCB and External PCB (If normal, communication LED blinks)
* Measuring input voltage
* Noise filter wiring
R(L1) S(L2) T(L3) N
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Only for training and service purposes
Error Point Main Reasons
Main Reasons
1. Power cable or communication
cable is not connected
1. Power cable or communication cable is not
2. Defect of outdoor Cycle/External
connected
PCB
2. Defect of outdoor Cycle/External PCB
- 150 -
LGE Internal Use Only
135
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