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Panasonic Aquarea T-CAP R32 fault H44

Abnormal zone 2 sensor

Heat pump

What it means

Abnormality detected in the Zone 2 sensor circuit, continuing for 5 seconds, indicating faulty sensor, connector, or PCB.

Likely causes

  1. Faulty connector connection
  2. Faulty indoor sub PCB
  3. Indoor communication error

Where to start

  1. Turn off power, check connector connection normal
  2. Plug out from sub PCB, check sensor characteristics by measuring resistance to see if it matches specification
  3. Check water temperature Zone 2 sensor wiring and continuity

The full answer, free

  • 4 more checks in order
  • How to put it right, step by step
  • The manual page for this fault (page 177), 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