096 on an iDM Energiesysteme TERRA SW: Operating limit MOP: Operation outside the compressor envelope: at the current condensing temperature the evaporating temperature is outside the operating range
Short answer
On an iDM Energiesysteme heat pump, 096 means: Operating limit MOP: Operation outside the compressor envelope: at the current condensing temperature the evaporating temperature is outside the operating range. 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: Operating limit MOP: Operation outside the compressor envelope: at the current condensing temperature the evaporating temperature is outside the operating range.
Part involved: Operating limit MOP.
When it shows: Operation outside the compressor envelope: at the current condensing temperature the evaporating temperature is outside the operating range.
Is it safe?
| Does the heat pump stop? | Not stated |
|---|---|
| Engineer needed? | Yes |
The manual does not say whether the heat pump stops.
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