Troubleshooting by Remote Controller
SiUS281117
Service Diagnosis
121
2.14 Capacity Setting Abnormality
Remote
Controller
Display
AJ
Applicable
Models
All indoor models
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
Operation and:
When the capacity code is not contained in the PCB memory, and the capacity setting adaptor
is not connected.
Supposed
Causes
Defective capacity setting adaptor connection
Defective indoor unit PCB
Troubleshooting
Install a capacity setting
adaptor.
Replace the indoor unit PCB.
NO
NO
YES
YES
Replace the indoor unit PCB.
The
indoor unit PCB
was replaced with a
spare PCB.
The
capacity setting
adaptor need to be
installed when
replacing the
PCB.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution