Daikin VRV S RXQ4/5ARV1 - Transmission Abnormality (between Indoor Unit PCB and Fan PCB)

SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 215
5.13 Transmission Abnormality (between Indoor Unit PCB
and Fan PCB)
Applicable
Models
FXMQ-PB
Error Code C1
Method of Error
Detection
Transmission conditions between the indoor unit control PCB (A1P) and fan PCB (A2P) are
checked via microcomputer.
Error Decision
Conditions
When normal transmission is not carried out for a certain duration.
Supposed
Causes
 Defective connection of the connector between indoor unit control PCB (A1P) and fan PCB
(A2P)
 Defective indoor unit control PCB (A1P)
 Defective fan PCB (A2P)
 External factor, such as instantaneous power failure