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Troubleshooting for Outdoor Unit SiUS121827E
220 Part 6 Service Diagnosis
Troubleshooting
Connect the reactor properly.
(R20419)
NO
YES
Connect the compressor
properly.
NO
YES
Replace the reactor.
NO
YES
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).
NO
YES
Disconnect the reactor from the outdoor
unit PCB and measure the resistance
value between reactor terminals with
multimeter.
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.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
10 Ω or less
between each terminal?
Check the connection of the
compressor.
Check the reactor.
Check the compressor.
Turn off the power.
Check the connection of the
reactor.
Connection OK?
Connection OK?
10 Ω or less?
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