Combination Error Between Indoor Unit Control Pcb And Fan Pcb - Daikin REYQ-XA Service Manual

Troubleshooting by Error Code
3.23 Combination Error between Indoor Unit Control PCB and
Fan PCB
C6
Error Code
Applicable FXSQ-TA, FXMQ-PB
Models
Method of Error Check the condition of transmission with fan PCB (A2P) using indoor unit control PCB (A1P).
Detection
Error Decision
When the communication data of fan PCB (A2P) is determined as incorrect.
Conditions
Supposed
Causes
Troubleshooting
279
Defective fan PCB (A2P)
Defective connection of capacity setting adaptor
Field setting error
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Does
the fan PCB
part No. match that
of the spare
parts list?
YES
Was
indoor unit
control PCB
(A1P) replaced
with a spare
PCB?
YES
Was
correct
capacity setting
adaptor installed
when replacing it
with a spare
PCB?
YES
NO
NO
NO
Replace it with correct fan PCB
(A2P).
After establishing transmission
for indoor and outdoor units,
diagnose the operation again.
Install correct capacity setting
adaptor.
After establishing transmission
for indoor and outdoor units,
diagnose the operation again.
Service Diagnosis
SiUS371901E