Daikin SkyAir FHQ24PVJU - Defective Capacity Setting

SiUS281811EA Troubleshooting by Error Codes
Part 6 Service Diagnosis 237
4.18 Defective Capacity Setting
Error code AJ
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
The capacity code is not saved to the PCB, and the capacity setting adaptor is not connected.
A capacity that does not exist for that unit is set.
Supposed
Causes
 Defective capacity setting adaptor connection
 Defective indoor unit PCB
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Replace the indoor unit control
PCB (A1P).
Replace the indoor unit control
PCB (A1P).
NO
NO
YES
YES
Install a capacity setting
adaptor.
The
indoor unit PCB was replaced
with a spare PCB.
The
capacity setting
adaptor was installed when
replacing the PCB.