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SiUS30-1301
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
171
3.10 Transmission Abnormality between Indoor Unit PCB and
Fan PCB
Error Code
C1
Applicable
Models
FXMQ07~48P
Method of Error
Detection
Check the condition of transmission between indoor unit PCB (A1P) and fan PCB (A2P) using
computer.
Error Decision
Conditions
When normal transmission is not conducted for certain duration.
Supposed
Causes
Connection defective the connecter between indoor unit PCB (A1P) and fan PCB (A2P)
Defective indoor unit PCB (A1P)
Defective fan PCB (A2P)
External factor, such as instantaneous blackout
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 connecter
X70A and turn ON the
power again.
Connect it and continue the
operation (It is possible to have
a cause, such as instantaneous
blackout).
Connect the connector
accurately.
Replace the indoor unit PCB
(A1P).
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.