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Panasonic Aquarea T-CAP R32 fault F16

Input over current detection

Heat pump

What it means

During operation of cooling and heating, when outdoor current above 28.0A (Heating) and 20.0A (Cooling) is detected by the current transformer (CT) in the outdoor unit PCB.

Likely causes

  1. Outdoor running current exceeding Y value (30.0A) repeatedly
  2. Compressor overload
  3. Possible refrigerant or electrical fault causing high current draw
  4. Excessive refrigerant
  5. Faulty outdoor unit PCB (main)

Where to start

  1. Check outdoor running current against X and Y thresholds for the operation mode (heating/cooling)
  2. Verify number of occurrences within 20 minute window
  3. Check compressor frequency reduction response prior to shutdown

The full answer, free

  • 16 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 196), 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