Heat pumps · Error codes · iDM Energiesysteme
284iDM Energiesysteme · TERRA SW (2013)
284 on an iDM Energiesysteme TERRA SW: Solar module not present: Solar control configured but no CAN-bus communication with the solar module
Short answer
On an iDM Energiesysteme heat pump, 284 means: Solar module not present: Solar control configured but no CAN-bus communication with the solar module. The heat pump keeps running. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Solar module not present: Solar control configured but no CAN-bus communication with the solar module.
Part involved: Solar module not present.
When it shows: Solar control configured but no CAN-bus communication with the solar module.
Is it safe?
| Does the heat pump stop? | No |
|---|---|
| Severity | Warning |
| Engineer needed? | Yes |
The heat pump keeps running.
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.
What you might notice
Sources
- IDM Wärmepumpen mit Navigatorregelung 2.0 - Bedienungsanleitung (812152 Rev.3) ↗ · 812152 Rev.3 · page p.73 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026