241 on an iDM Energiesysteme TERRA SW: High pressure fault 2 (second refrigerant circuit): The high pressure switch has switched the heat pump off
Short answer
On an iDM Energiesysteme heat pump, 241 means: High pressure fault 2 (second refrigerant circuit): The high pressure switch has switched the heat pump off. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: High pressure fault 2 (second refrigerant circuit): The high pressure switch has switched the heat pump off.
Part involved: High pressure fault 2 (second refrigerant circuit).
When it shows: The high pressure switch has switched the heat pump off.
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
- Note the fault number and text shown after tapping the fault symbol on the Navigator display. If the fault recurs several times, contact iDM customer service/your installer.
What the engineer will check
- Diagnose per iDM service documentation for the unit (not obtained): check the monitored circuit/component named in the fault.
Who to ask for: heat pump engineer.
Certification: F-Gas category I certificate (refrigerant circuit work).
What you might notice
Sources
- IDM Wärmepumpen mit Navigatorregelung 2.0 - Bedienungsanleitung (812152 Rev.3) ↗ · 812152 Rev.3 · page p.72 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026