Combination Abnormality (Between Indoor Unit Pcb And Fan Pcb) - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

Troubleshooting by Error Code
4.14 Combination Abnormality (between Indoor Unit PCB and
Fan PCB)
C6
Error Code
Applicable FXMQ-PB
Models
Method of Error Transmission conditions with the fan PCB (A2P) are checked using the indoor unit PCB (A1P).
Detection
Error Decision
When the communication data of fan PCB (A2P) is determined as incorrect
Conditions
Supposed
Causes
Troubleshooting
157
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 the
indoor unit main PCB
(A1P) replaced with a
spare PCB?
YES
Was the
correct capacity
setting adaptor installed
when replacing it with
a spare PCB?
YES
NO
NO
NO
SiUS331604E
Replace it with the correct
fan PCB (A2P).
After establishing
transmission for indoor and
outdoor, diagnose the
operation again.
Install the correct capacity
setting adaptor.
After establishing
transmission for indoor and
outdoor, diagnose the
operation again.
Service Diagnosis