temporary-heat-pump-stop-e21-rhp on an IVT Greenline HE: Activated when the pressure in the refrigerant circuit becomes too high. If the information appears several times during a certain time period, the information transforms into a category A alarm (Æ Chapter 11.7.3)
Short answer
On an IVT heat pump, temporary-heat-pump-stop-e21-rhp means: Activated when the pressure in the refrigerant circuit becomes too high. If the information appears several times during a certain time period, the information transforms into a category A alarm (Æ Chapter 11.7.3). The heat pump keeps running with some functions stopped. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Activated when the pressure in the refrigerant circuit becomes too high. If the information appears several times during a certain time period, the information transforms into a category A alarm (Æ Chapter 11.7.3).
Part involved: E21.RHP.
When it shows: Activated when the pressure in the refrigerant circuit becomes too high. If the information appears several times during a certain time period, the information transforms into a category A alarm (Æ Chapter 11.7.3).
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Warning |
| Engineer needed? | Yes |
The heat pump keeps running with some functions stopped.
What you can check
- Note the full alarm text including the component designation (e.g. E21.T6) - IVT asks for it when you contact the dealer.
What the engineer will check
- Check refrigerant circuit pressures, superheat and charge; check brine/heating flows, particle filters and pressure switch.
Who to ask for: heat pump engineer.
What you might notice
Sources
- User Guide Greenline HE C6-C11 E6-E17 (6 720 643 415 (2010/03)) ↗ · 6 720 643 415 (2010/03) · page 6 720 643 415 p.34 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026