SiAF341904E
Troubleshooting by Error Code
Part 6 Service Diagnosis
207
5.15 Combination Abnormality (between Indoor Unit PCB and
Fan PCB)
Applicable
Models
FXMQ40-140PB
Error Code
C6
Method of Error
Detection
Transmission conditions with the fan PCB (A2P) are checked using the indoor unit PCB (A1P).
Error Decision
Conditions
Fan PCB (A2P) communication data is determined to be incorrect.
Supposed
Causes
Defective fan PCB (A2P)
Defective connection of capacity setting adaptor
Field setting error
Troubleshooting
N
O
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.
Has the
indoor
u
nit main PCB
(A1P)
b
een replaced
w
ith
a spare PCB?
YES
YES
YES
N
O
N
O
W
as the
correct capacity
setting adaptor installed
w
hen replacing it
w
ith
a spare PCB?
After esta
b
lishing
transmission for indoor and
o
u
tdoor, diagnose the
operation again.
After esta
b
lishing
transmission for indoor and
o
u
tdoor, diagnose the
operation again.
Replace it
w
ith the correct
fan PCB (A2P).
Install the correct capacity
setting adaptor.
Does the
fan PCB part
N
o.
match that of the spare
parts list?
