MXZ-5C42NA3 Service Manual

120
Check of power supply
Outdoor unit does not operate.
12-6. TROUBLESHOOTING FLOW
Turn ON the power supply.
No
Yes
Yes
No
No
Yes
Check the main power supply circuit for proper connections.
Is there voltage of 208/230 V AC in the
power supply terminal block?
Is the output voltage from the outdoor
power P.C. board 294/325 V DC?
Check the power supply cable.
Replace the outdoor power P.C. board.
Turn OFF the power supply and recconnect the reactor.
Is the resistance of reactor normal? *1
Replace the reactor.
Replace the outdoor control P.C. board.
*1 MXZ-3C24NA MXZ-3C30NA MXZ-4C36NA
MXZ-2C20NA2 MXZ-3C24NA2 MXZ-3C30NA2 MXZ-4C36NA2
MXZ-2C20NA3 MXZ-3C24NA3 MXZ-3C30NA3 MXZ-4C36NA3
MXZ-2C20NA4 MXZ-3C24NA4 MXZ-3C30NA4 MXZ-4C36NA4
Measuring points Resistance
pin 1 – pin 2 1 Ω or less
pin 3 – pin 4 1 Ω or less
MXZ-5C42NA MXZ-5C42NA2 MXZ-5C42NA3 MXZ-5C42NA4
MXZ-2C20NAHZ MXZ-3C24NAHZ MXZ-3C30NAHZ
MXZ-2C20NAHZ2 MXZ-3C24NAHZ2 MXZ-3C30NAHZ2
MXZ-2C20NAHZ3 MXZ-3C24NAHZ3 MXZ-3C30NAHZ3
MXZ-2C20NAHZ4 MXZ-3C24NAHZ4 MXZ-3C30NAHZ4
Measuring points Resistance
– 1 Ω or less
OBH702M