Mitsubishi Electric MXZ-2C30VA Service Manual page 84

11-6. TROUBLESHOOTING FLOW
Outdoor unit does not operate.
Check of power supply
MXZ-2C30/2C40/2C52VA
Check the main power supply circuit for proper connections.
Turn ON the power supply.
Is there voltage of 230V AC in the
power supply terminal block?
Yes
Is the output voltage from the power
P.C. board 230V AC?
Yes
Is the input voltage to the inverter P.C.
board 230V AC?
Yes
Replace the inverter P.C. board.
MXZ-3C54/3C68/4C71/4C80/5C100VA
Check the main power supply circuit for proper connections.
Turn ON the power supply.
Is there voltage of 230V AC in the
power supply terminal block?
Yes
Is the output voltage from the noise
filter P.C. board 230V AC?
Yes
Is the input voltage to the power board
230V AC?
Yes
Is the input voltage to the outdoor
electronic control P.C. board 325V DC?
Yes
Replace the outdoor electronic control
P.C. board.
No
Check the power supply cable.
Replace the power
No
P.C. board.
No
Replace the reactor.
No
Check the power supply cable.
Replace the noise
No
filter P.C. board.
No
Replace the reactor.
No
Replace the power board.
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