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Check of power supply
Outdoor unit does not operate.
Turn ON the power supply.
No
Yes
Yes
No
Yes
No
Yes
No
Replace the power board.
Check the connecting of parts of main power supply circuit.
Is there voltage of 208/230 V AC in the
power supply terminal block?
Is the output voltage from the noise
filter P.C. board 208/230 V AC?
Is the input voltage to the outdoor
electronic control P.C. board 294/325 V DC?
Check the power supply cable.
Replace the outdoor electronic control
P.C. board.
Replace the noise
filter P.C. board.
Is the input voltage to the power board
208/230 V AC?
Replace the reactor.
11-6. TROUBLESHOOTING FLOW
MXZ-2B20NA MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA