Daikin SkyAir FHQ24PVJU - Combination Abnormality (between Indoor Unit PCB and Fan PCB)

Troubleshooting by Error Codes SiUS281811EA
242 Part 6 Service Diagnosis
4.22 Combination Abnormality (between Indoor Unit PCB and
Fan PCB)
Error Code C6
Applicable
Models
FBQ-P
Method of Error
Detection
Transmission conditions with fan PCB (A2P) are checked using the indoor unit PCB (A1P).
Error Decision
Conditions
Communication data of fan PCB (A2P) is determined as incorrect.
Supposed
Causes
 Defective fan PCB (A2P).
 Defective connection of capacity setting adaptor
 Defective setting error
Troubleshooting
Replace it with correct fan PCB
(A2P).
Install the correct capacity setting
adaptor.
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.
NO
Was the
indoor unit PCB
(A1P) replaced
with a spare
PCB?
NO
NO
YES
YES
YES
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
Does
the fan PCB part
No. match that of the
spare parts list?