Heat pumps · Error codes · Kronoterm
ERROR-CascadeKronoterm · TERMOTRONIC-controlled heat pumps (legacy WP / WPL / WPLV water-water, brine-water, air-water)
ERROR-Cascade on a Kronoterm TERMOTRONIC-controlled heat pumps: Individual device did not respond 3x during cascade verification (MD1 to MD4)
Short answer
On a Kronoterm heat pump, ERROR-Cascade means: Individual device did not respond 3x during cascade verification (MD1 to MD4). 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: Individual device did not respond 3x during cascade verification (MD1 to MD4).
Part involved: cascade communication.
Likely causes:
- Communication error.
- No guaranteed constant power to a device.
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 exact message shown on the TERMOTRONIC display.
What the engineer will check
- Authorised service.
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