Daikin REYQ-TA Series, Service Manual

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Troubleshooting by Error Code SiUS371614E
193 Service Diagnosis
3.16 Transmission Abnormality between Indoor Unit PCB and
Fan PCB
Error Code
C1
Applicable
Models FXMQ-PB
Method of Error
Detection Transmission conditions between the indoor unit main PCB (A1P) and fan PCB (A2P) are checked
via microcomputer.
Error Decision
Conditions When normal transmission is not conducted for certain duration.
Supposed
Causes
„
Connection defective the connector between indoor unit main PCB (A1P) and fan PCB (A2P)
„
Defective indoor unit main PCB (A1P)
„
Defective fan PCB (A2P)
„
External factor, such as instantaneous power failure
Troubleshooting
Under
above field
setting mode, second
code No. is
01 .
NO
NO
YES
Replace the fan PCB (A2P).
YES
YES
Is the
connector
between indoor
unit PCB (A1P) and
fan PCB (A2P)
accurately
connected?
(
∗
1)
NO
C1 is
displayed
again.
Confirm the condition of
transmission on indoor
unit PCB using field
setting mode. (
∗
2)
Connect the connector
X70A and turn ON the
power again.
Connect it and continue the
operation (It is possible to have
a cause, such as instantaneous
power failure).
Connect the connector
accurately.
Replace the indoor unit main
PCB (A1P).
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.