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Panasonic Aquarea T-CAP R32 fault F41

Power factor correction (PFC) abnormality

Heat pump

What it means

During operation of cooling and heating, the PFC protection circuitry in the outdoor unit PCB (main) senses abnormal high DC voltage level.

Likely causes

  1. Voltage at PFC abnormal
  2. Power supply surge
  3. Compressor windings not uniform
  4. Faulty outdoor unit PCB (main)

Where to start

  1. Check voltage at PFC
  2. Check the supply voltage. If not as specified, correct the power supply.
  3. If supply voltage is as specified, operate the system and verify PFC abnormality by measuring the DC voltage between DCP-OUT and DCN-OUT of the outdoor unit PCB (main).

The full answer, free

  • 14 more checks in order
  • The readings and component tests from the manual
  • How to put it right, step by step
  • The manual page for this fault (page 207), right under the answer
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Safety: Isolate the outdoor unit and any backup heater, and give the inverter capacitors time to discharge before you open the electrics. Anything on the refrigerant circuit needs F-gas certification.

From the Panasonic manual for the Aquarea T-CAP R32. Check the model on the data plate before you order parts.

Other Panasonic Aquarea T-CAP R32 fault codes