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F1

F1 - Abnormal oil pressure

Daikin · Air Conditioning

What does F1 mean?

The compressor is reporting abnormal oil pressure, which is critical for lubrication.

Common Causes

  • Low refrigerant charge
  • Restriction in oil lines
  • Faulty oil pressure sensor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the unit at the breaker for 60 seconds, then restore power.

  2. 2

    Ensure the system has the correct refrigerant charge.

  3. 3

    This requires professional diagnosis of the lubrication system.

Browse all codes in this manual (79)
Verified technical data. Last updated: April 2026

Related Faults

A0A0 - External protection activeA1A1 - Indoor PCB failureA2A2 - Malfunction of freezing protection
Source: Daikin Air Conditioning
Open Manual (Page 1)Search more codes in this manual