LG FMN0760NL Service Manual page 88

Trouble 7-1
I DC Peak Error(Error Code
Does the LED02T of outdoor PCB Ass'y
blink 9 times?
Is the connecting state of connectors in out-
door Sub. PCB Ass'y right?
(U, V, W, CN-IPM, CN-GATE1, CN-GATE2)
Is the power module in Sub PCB Ass'y
right?
Is the voltage of CN-POWER over than
AC170V?
Is the voltage of CN-DC over than about
DC310V?
Is the refrigerant pressure right?
Replace the PCB Ass'y.
• Main PCB Ass'y
• Sub PCB Ass'y
• Control Box Ass'y
When compressor does not operate normally.
)
YES
YES
YES
YES
YES
NO
NO
Check the state of connecting cable (4 line)
between indoor and outdoor uint.
NO
• Electrical wiring diagram (Colors)
• Check the connecting state of connectors
in PCB Ass'y(Main/Sub)
• If CN-U, W, V is connected, the comprres-
sor can be operated a opposite direction.
NO
• Check the short P-N P-U, V, W, and N-U,
V, W of IPM.
• Replace the Sub PCB Ass'y.
NO
Check the supplied voltage.
NO
• Check CN-IPM connector
• Replace the Sub PCB Ass'y.
NO
Supply the refrigerant.
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