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SiUS28-902_B
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
99
3.8
Capacity Setting Device Abnormality
Remote
controller display
AJ
Applicable
Models
FCQ, FHQ, FAQ, FTQ
Method of Error
Detection
Capacity is determined according to resistance of the capacity setting adaptor and the memory
inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is
determined.
Error Decision
Conditions
When the capacity code is not saved to the PCB, and the capacity setting adaptor is not
connected.
When a capacity that does not exist for that unit is set.
Supposed
Causes
The capacity setting adaptor was not installed.
Defective indoor unit PCB
Troubleshooting
The indoor
u
nit PCB
w
as replaced
w
ith a spare PCB.
The
capacity setting
adaptor need to
b
e
installed
w
hen replacing the
PCB.
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector or parts may
b
e damaged.
Install a capacity setting adaptor.
Replace the indoor
u
nit PCB.
N
O
N
O
YES
YES
Replace the indoor
u
nit PCB.