-
42
-
Current cut
[Open phase on compressor output
terminal, compressor lock]
NO
NO
YES
YES
NO
YES
¡
Check compressor wiring visually.
¡
Check insulation resistance. (1 M
Ω
or over)
¡
Check coil wire resistance. (Few
Ω
)
Does current cut operate when
operating inverter with compressor
wire disconnected?
Is output voltage applied to all 3
phases of power transistor?
Is there any shortcircuit?
Inspect compressor.
Defective outdoor PCB
Defective outdoor PCB
Secure space for suction
and blow out.
If check results are normal,
compressor is locked.
Trouble of outdoor unit
[Compressor malfunction of
insufficient gas (refrigerant)]
Does compressor operation?
Is output voltage applied to all 3 phases
of power transistor?
Replace compressor.
Replace heat exchanger sensor
Insufficient gas
Is refrigerant amount normal?
Is heat exchanger sensor resistance
value good?
Is connector for compressor connection
good?
Does trouble persist after charging gas?
Clogged capillary tube or strainer,
defective EEV, etc.
Defective outdoor PCB
Correct connection
Check if there are any places where
gas is leaking
YES
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
Current safe stop
[Overload operation, compressor
lock, overcharge]
Secure space for inlet and outlet.
Discharge refrigerant.
Is refrigerant charge quantity adequate?
Is outdoor ventilation condition good?
Inspect compressor.
Defective outdoor PCB
YES
YES
NO
NO
YES
