Heat pumps · Error codes · Atlantic
IF-41Atlantic
IF-41 on an Atlantic heat pump: Heat pump capacity signal error (open or short)
Short answer
On an Atlantic heat pump, IF-41 means: Heat pump capacity signal error (open or short). The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 2 sources
What it means
The manual says: Heat pump capacity signal error (open or short).
Likely causes:
- Power supply abnormality or outdoor/indoor PCB, inverter or IPM fault.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
What you can check
- Check the heat pump isolator and consumer-unit breakers are on (do not open any casing).
- Note the error number/LED pattern shown and give it to your installer.
- If breakers trip repeatedly, leave the unit off and call an engineer.
What the engineer will check
- Check supply voltage, PCB, inverter/IPM/PFC components and connectors.
Who to ask for: electrical / heat pump.
Certification: Qualified electrician / heat pump engineer.
What you might notice
Sources
- alféa excellia duo Maintenance Document (U0546279_1738_EN_16) ↗ · U0546279_1738_EN_16 · page 69 · Reviewed 23 September 2026
- alféa extensa + Installation and operating manual (doc 1734-10, 1734-EN) ↗ · 1734-10 · page 75 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026