Skip to main contentStart diagnosing A8 on your Daikin air conditioner
Daikin Air Conditioner Error Code A8
A8Daikin Air Conditioner
What this code means
Abnormal power supply voltage - fan motor input voltage is 150V or less, or 420V or more (FBQ only).
First step from the service manual
Check if power supply voltage is 208V-230V ±10%; check for open phase or defective wiring.
Next steps: diagnose the root cause
1
Verify the error code is active
Power cycle the unit and see if the code returns. If it does, the fault is persistent and requires diagnosis.
2
Get the full diagnostic procedure
Get step-by-step guidance, test values, and wiring diagrams from the OEM service manual.
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