Mitsubishi Electric MXZ-2D33VA Service Manual page 139

MXZ-3D54VA/3D54VA2/3D68VA/4D72VA/4D83VA/5D102VA
Check the main power supply circuit for proper connections.
Turn ON the power supply.
Is there voltage of 230 VAC in the
power supply terminal block?
Yes
Is the output voltage from the noise
filter P.C. board 230 VAC?
Yes
Is the input voltage to the power P.C.
board 230 VAC?
Yes
Is the input voltage to the outdoor
electronic control P.C. board 325 VDC?
Yes
Replace the outdoor control P.C. board.
MXZ-6D122VA
Check the main power supply circuit for proper connections.
Turn ON the power supply.
Is there voltage of 230 VAC in the
power supply terminal block?
Yes
Is the output voltage from the outdoor
power P.C. board 325 VDC?
No
Turn OFF the power supply and recconnect the reactor.
Is the reactor short-circuited?
Yes
Replace the outdoor power P.C. board.
OBH626K
No
Check the power supply and correct them.
No
Replace the noise filter P.C. board.
No
Replace the reactor.
No
Replace the outdoor power P.C. board.
No
Check the power supply cable.
Yes
Replace the outdoor control P.C. board.
No
Replace the reactor.
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