P6 on an Immergas MAGIS M monobloc R32 - sold in UK as Alpha Magis M: Inverter module protection

What it means

The manual says: Inverter module protection.

Likely causes:

• Low supply voltage.
• Units too close.
• Coil dirty/blocked.
• Fan not working.
• Refrigerant overcharge.
• Low water flow/air/pump head.
• Outlet water sensor loose.
• Storage tank coil small.
• Module wiring/screws/thermal paste.
• Cable connection.
• Drive board faulty.
• Compressor faulty.

Is it safe?

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 consumer-unit breaker/isolator for the heat pump is on.
• 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

• Low supply voltage.
• Units too close.
• Coil dirty/blocked.
• Fan not working.
• Refrigerant overcharge.
• Low water flow/air/pump head.
• Outlet water sensor loose.
• Storage tank coil small.
• Module wiring/screws/thermal paste.
• Cable connection.
• Drive board faulty.
• Compressor faulty.

Who to ask for: heat pump engineer.

Certification: Electrical competence.

What you might notice

• Error code on the control panel

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