Skip to main contentStart diagnosing JC on your Daikin air conditioner
Daikin Air Conditioner Error Code JC
JCDaikin Air Conditioner
What this code means
Low pressure sensor abnormality - sensor short-circuit or open circuit detected.
First step from the service manual
Check if low pressure sensor is connected to X18A of outdoor unit PCB (A1P); measure voltage between pins.
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.
$29/month · Cancel anytime · Or $9.95 3-day pass
What’s available for Daikin air conditioner models
Access Daikin air conditioner service manuals, wiring schematics, exploded parts views, and error code references on MyPros+.