SiUS281117
Troubleshooting by Remote Controller
126
Service Diagnosis
2.18 Combination Error between Indoor Unit PCB and Fan
PCB
Remote
Controller
Display
C6
Applicable
Models
FBQ
Method of Error
Detection
Conduct open line detection with fan PCB (A2P) using indoor unit PCB (A1P).
Error Decision
Conditions
When the communication data of fan PCB is determined as incorrect.
Supposed
Causes
Defective fan PCB
Defective connection of capacity setting adaptor.
Defective field setting
Troubleshooting
Note:
1. Type of fan PCB
Replace it with correct fan
PCB (A2P).
Is
the type of
fan PCB (A2P) correct?
(
∗
1)
Install correct capacity
setting adaptor.
Was
correct capacity
setting adaptor installed
when replacing it with
a spare PCB?
After establishing
transmission for indoor and
outdoor, diagnose the
operation again.
NO
Was indoor unit
PCB (A1P) replaced with
a spare PCB?
NO
YES
YES
YES
NO
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
Applicable model
Type of fan PCB
FBQ18/24/30
PC0609-2
FBQ36/42
PC0609-3