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F46

F46 - Outdoor Current Transformer open circuit

Panasonic · Aquarea Heat Pumps

What does F46 mean?

The Current Transformer (CT) in the outdoor unit has an open circuit. This can be related to refrigerant issues or PCB faults.

Common Causes

  • Insufficient refrigerant
  • Outdoor PCB fault
  • Compressor low pressure issue

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check refrigerant levels.

  2. 2

    Inspect the outdoor PCB for any visible damage.

  3. 3

    Ensure the compressor is functioning correctly.

  4. 4

    Contact a qualified installer or service technician for diagnosis.

Browse all codes in this manual (69)
Verified technical data. Last updated: April 2026

Related Faults

2 beeps then pause2 beeps then pause - Overfill warning3 red flashes3 red flashes - Communication errorError Code DisplayError Code Display - Abnormality detected
Source: Panasonic Aquarea Heat Pumps
Open Manual (Page 77)Search more codes in this manual