Mitsubishi Electric MXZ-2A20NA-1 Service Manual page 46

11-6. Troubleshooting flow
MXZ-2A20NA MXZ-2A20NA -
Outdoor unit does not operate. (LED display: display OFF)
A A Check of power supply
Check the connecting of parts of main power supply circuit.
Turn ON the power supply.
Is there voltage of 208/230V AC in the
power supply terminal block?
Yes
Is the output voltage from the noise
filter P.C. board 208/230V AC?
Yes
Is the input voltage to the power board
208/230V AC?
Yes
Is the input voltage to the outdoor
electronic control P.C. board 294/325V DC?
Yes
Replace the outdoor electronic control
P.C. board.
MXZ-3A30NA MXZ-3A30NA -
1
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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