Troubleshooting by Error Code SiUS331604E
157 Service Diagnosis
4.14 Combination Abnormality (between Indoor Unit PCB and
Fan PCB)
Error Code C6
Applicable
Models
FXMQ-PB
Method of Error
Detection
Transmission conditions with the fan PCB (A2P) are checked using the indoor unit PCB (A1P).
Error Decision
Conditions
When the communication data of fan PCB (A2P) is determined as incorrect
Supposed
Causes
Defective fan PCB (A2P).
Defective connection of capacity setting adaptor
Field setting error
Troubleshooting
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Was the
indoor unit main PCB
(A1P) replaced with a
spare PCB?
YES
YES
YES
NO
NO
Was the
correct capacity
setting adaptor installed
when replacing it with
a spare PCB?
After establishing
transmission for indoor and
outdoor, diagnose the
operation again.
After establishing
transmission for indoor and
outdoor, diagnose the
operation again.
Replace it with the correct
fan PCB (A2P).
Install the correct capacity
setting adaptor.
Does the
fan PCB part No.
match that of the spare
parts list?
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