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Panasonic Aquarea T-CAP R32 fault H31

Abnormal swimming pool sensor

Heat pump

What it means

The indoor sub PCB has detected an abnormal reading from the swimming pool sensor, sustained continuously for 5 seconds, indicating a connection fault, sensor fault, or PCB fault.

Likely causes

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

Where to start

  1. Check pool temperature sensor wiring and continuity
  2. When H31 occurs, check connector sensor at CN204 connection is normal - if NO, correct sensor connection
  3. If resistance matches characteristic (YES), change Indoor sub PCB

The full answer, free

  • 1 more check in order
  • How to put it right, step by step
  • The manual page for this fault (page 172), 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