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Panasonic Aquarea T-CAP R32 fault H43

Abnormal zone 1 sensor

Heat pump

What it means

Abnormality detected in the Zone 1 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. Check water temperature Zone 1 sensor wiring and continuity
  2. Turn off power and check connector connection. Normal? If No, correct connection (poor contact).
  3. If connector connection normal, check plug out connector from zone 1 connector sub PCB and measure resistance of zone 1 sensor; does characteristic match? If No, defective zone sensor - replace sensor.

The full answer, free

  • 2 more checks in order
  • How to put it right, step by step
  • The manual page for this fault (page 176), 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