Error No. 75 - LG Multi V5 Service Manual

ERROR CODES

Error No. 75

Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
WARNING
troubleshooting of the Multi V product.
Error No. Description
75
Fan CT sensor
Master: 751
error.
Slave 1: 752
Slave 2: 753
Is the input voltage
Is the fan PCB correct?
After power is reset, does the
error still occur?
Recheck power and installation.
Check DC 15V input power on Inverter compressor PCB.
176
Offset of MICOM; fan motor phase current is
not 2.5V ± 0.3V.
No
normal?
Yes
No
Yes
No
Yes
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Details
1. Input voltage is not correct (not 15V).
2. Fan PCB assembly is defective.
3. Power wiring has disconnected or has
4. Inverter PCB assembly is defective.
Check 15V input power wiring connections.
Replace fan PCB.
Check if fan PCB IPM is correct.
Images here are representative of system components. Actual compo-
nent appearance depends on model and system type.
Causes
shorted.