Pd on an Immergas MAGIS M monobloc R32 - sold in UK as Alpha Magis M: High temperature protection of refrigerant outlet temperature in the condenser
Short answer
On an Immergas heat pump, Pd means: High temperature protection of refrigerant outlet temperature in the condenser. The manual does not say whether the heat pump stops. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: High temperature protection of refrigerant outlet temperature in the condenser.
Likely causes:
- Coil protection not removed.
- Coil dirty/blocked.
- Insufficient space around unit.
- Fan motor damaged.
Is it safe?
| Does the heat pump stop? | Not stated |
|---|---|
| Engineer needed? | Yes |
The manual does not say whether the heat pump stops.
Manual reset: Manual 13.4: reset the safety device by switching the unit off and back on; if this fails contact your local dealer.
What you can check
- Check the outdoor unit is not blocked by leaves, debris or snow and has clear airflow.
- Note the code on the control panel and contact the installer / Alpha-Immergas authorised service.
- The manual says to reset the safety device by switching the unit off and back on; if the reset fails, contact the dealer - do not keep resetting.
What the engineer will check
- Coil protection not removed.
- Coil dirty/blocked.
- Insufficient space around unit.
- Fan motor damaged.
- Refrigerant-circuit diagnosis/charging (F-gas certified engineer).
Who to ask for: heat pump / refrigeration engineer.
Certification: F-gas certification for refrigerant circuit work (unit is hermetically sealed; installation needs no F-gas per Alpha).
What you might notice
Sources
- MAGIS M4-30 Block heat pumps - Use and Installation - Instructions and warnings (IE edition), *1.046978ENG* ↗ · 1.046978ENG · page 128 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026