Heat pumps · Error codes · Kronoterm
MODULE-ALARMKronoterm · TERMOTRONIC-controlled heat pumps (legacy WP / WPL / WPLV water-water, brine-water, air-water)
MODULE-ALARM on a Kronoterm TERMOTRONIC-controlled heat pumps: Malfunction of one of the modules (MODULE 1-4 ALARM); device restarts automatically after the error is resolved
Short answer
On a Kronoterm heat pump, MODULE-ALARM means: Malfunction of one of the modules (MODULE 1-4 ALARM); device restarts automatically after the error is resolved. 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: Malfunction of one of the modules (MODULE 1-4 ALARM); device restarts automatically after the error is resolved.
Part involved: I/O modules MD1-MD4.
Likely causes:
- Communication error.
- Module malfunction.
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.
Resetting itself: Device restarts automatically after error resolved.
What you can check
- Note the exact message shown on the TERMOTRONIC display.
What the engineer will check
- Authorised service: module/communication diagnosis.
Who to ask for: heat pump engineer.
What you might notice
Sources
- KRONOTERM Owner's manual for heat pumps water-water, brine-water and air-water (TERMOTRONIC controller), Id 17-16-19-2972-05 ↗ · 17-16-19-2972-05 · page 52, 60 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026