Refer to P.190.
Refer to P.193.
Open the stop valve.
Is the stop valve opened?
Compressor inspection.
Inspect according to the
diagnosis procedure for
abnormal noises, vibration,
operating status, etc. of the
compressor.
NO
Remedy the cause.
Check for excessive refrigerant
charging.
YES
YES
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Turn OFF the power supply.
NO YES
Replace the outdoor unit PCB
(A1P).
NO
YES
Replace the outdoor unit PCB
(A1P).
NO
CHECK 4
High pressure is high.
CHECK 2
CHECK 8
Is the secondary
current of the inverter higher
than A (*1) for
each phase?
Continuity check in the power
transistor (IGBT). Is the
continuity normal?