Capacity Determination Device Abnormality - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

Troubleshooting by Error Code

4.11 Capacity Determination Device Abnormality

AJ
Error Code
Applicable
All indoor units
Models
Method of Error Capacity is determined according to resistance of the capacity setting adaptor and the memory
Detection inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is
determined.
Error Decision
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.
Conditions
Supposed
Causes
Troubleshooting
153
The capacity setting adaptor was not installed.
Defective indoor unit PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
The indoor unit PCB
was replaced with a
spare PCB.
YES
The
capacity setting
adaptor need to be
installed when
replacing the
PCB.
YES
NO
NO
SiUS331604E
Replace the indoor unit main
PCB (A1P).
Replace the indoor unit main
PCB (A1P).
Install a capacity setting adaptor.
Service Diagnosis