Daikin 4MXS-R Series Service Manual page 211

SiUS121736EA
Troubleshooting
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn off the power.
Check the connection of the
reactor.
Connection OK?
YES
Check the connection of the
compressor.
Connection OK?
YES
Check the reactor.
10 Ω or less?
YES
Check the compressor.
10 Ω or less
between each terminal?
YES
NO
NO
Disconnect the reactor from the outdoor
unit PCB and measure the resistance
value between reactor terminals with
multimeter.
NO
Disconnect the compressor relay harness
from the outdoor unit PCB and measure
the resistance value between the each 3
terminals of the compressor with
multimeter.
NO
Troubleshooting for Outdoor Unit
Connect the reactor
properly.
Connect the compressor
properly.
Replace the reactor.
Replace the compressor or
the compressor relay
harness.
Restart the operation again
and if the error occurs
again, replace the outdoor
unit PCB (main PCB).
(R20419)
198