TradeAssistIQHome

Panasonic Aquarea T-CAP R32 fault H12

Connection capability rank abnormality

Heat pump

What it means

During startup operation of cooling and heating, the capability rank of the indoor unit as checked by the outdoor unit is used to determine connection capability rank abnormality. The fault is judged if the abnormality continues for 90 seconds.

Likely causes

  1. Indoor/outdoor capacity mismatch
  2. Heat pump error triggering backup heat source requirement
  3. Wrong model interconnected.
  4. Wrong indoor unit or outdoor unit PCB (main) used.
  5. Faulty indoor unit or outdoor unit PCB (main).

Where to start

  1. Confirm Force heater request ON by user OR auto turn ON by remote controller during error
  2. Check latest mode selection sent by remote controller (heat/cool/tank)
  3. Check indoor and outdoor units model number.

The full answer, free

  • 14 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 166), right under the answer
Ask about H12 freeCreate a free account

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