LG AMNW07GSJA0 Svc Manual page 114

6.7 Troubleshooting Outdoor Error
CH 21 (DC Peak / Comp IPM Fault)
DC Link Detection Circuit
Purpose Generation of an error caused by DC
link voltage detection error.
1. Set the tester in DC Voltage Mode and check the voltage.
2. Checking the voltage between DC Link detection signal and Micom GND.
3. The standard of normal voltage measurement is 2.4~2.8 V.
4. If the measurement is different from the standard, replace PCBA.
Current detection
part is normal.
! Caution : When the measurement is made in the state that the electricity is applied, check the tester
for being in the measurement mode and be careful to avoid possible short of the parts other
than the measuring part.
Items for checking 1. Checking DC link voltage detection error
Checking method
Apply the electricity.
Turn indoor devices off.
Measure voltage.
Within 2.4 ~ 2.8 V
Yes
- 113 -
No
Replace PCBA.
❈ PCBA : PCB Assembly
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5. Trouble Shooting