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Error code reference
Daikin Air Conditioner Error Code AJ
Capacity setting abnormality - capacity code not in PCB memory and capacity setting adaptor not connected.
SourceDaikin Air Conditioner - Service Manual: RZR-P, RZQ-P(9) Seriesp. 121
Diagnostic procedure
The full AJ procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check if indoor unit PCB was replaced with spare PCB; install capacity setting adaptor if needed.
SourceDaikin Air Conditioner - Service Manual: RZR-P, RZQ-P(9) Seriesp. 121
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
1 manual in the MyPros+ library documents this code for Daikin air conditioner.
Models covered by the manuals that document this code
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