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Panasonic Aquarea T-CAP R32 fault H23

Indoor refrigerant liquid temperature sensor abnormality

Heat pump

What it means

During startup and operation of cooling and heating, the temperatures detected by the indoor refrigerant liquid temperature sensor are used to determine sensor error.

Likely causes

  1. Refrigerant liquid temperature sensor defective or disconnected
  2. Faulty connector connection
  3. Faulty indoor unit PCB (main)
  4. Indoor communication error

Where to start

  1. Measure resistance of sensor with connector unplugged
  2. Check refrigerant liquid temperature sensor wiring and continuity
  3. Turn OFF the power and check the CN-TH1 connector connection. If not normal: connector poor contact - correct the connection.

The full answer, free

  • 4 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 169), 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.

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