Troubleshooting by Error Codes SiUS281811EA
238 Part 6 Service Diagnosis
4.19 Transmission Abnormality (between Indoor Unit PCB and
Fan PCB)
Error Code C1
Applicable
Models
FBQ-P
Method of Error
Detection
Transmission conditions between the indoor unit main PCB (A1P) and fan PCB (A2P) are checked
via microcomputer.
Error Decision
Conditions
Normal transmission is not carried out for a certain duration.
Supposed
Causes
Defective connection of 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
NO
Is the
connector between
indoor unit PCB (A1P) and fan
PCB (A2P) accurately
connected? (1)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Connect the connector accurately.
NO
Under
above field setting mode,
second code
No. is 01.
Replace the indoor unit control
PCB (A1P).
NO
YES
YES
YES
Replace the fan PCB (A2P).
Continue the operation (It is
possible there is cause, such as
instantaneous power failure).
Connect the connector X70A
and turn ON the power again.
C1
Reoccurrence
of error.
Confirm the condition of
transmission on indoor unit
PCB using field setting mode.
(2)
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