E061 on a CTC control system alarm/information platform: Max thermostat: the product has become too hot and the overheat (max) thermostat F10 has tripped; may also trip if stored in extreme cold before installation
Short answer
On a CTC heat pump, E061 means: Max thermostat: the product has become too hot and the overheat (max) thermostat F10 has tripped; may also trip if stored in extreme cold before installation. 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: Max thermostat: the product has become too hot and the overheat (max) thermostat F10 has tripped; may also trip if stored in extreme cold before installation.
Part involved: max thermostat F10 (immersion heater).
Likely causes:
- Product overheated.
- Max thermostat tripped after storage in extreme cold.
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The heat pump keeps running with some functions stopped.
Manual reset: Press "Reset alarm" on the display; a persisting fault must be rectified before it can be reset.
What you can check
- Note the alarm code/text, the product model and serial number and contact your installer.
What the engineer will check
- Reset max thermostat F10 on the electrical switchboard behind the front panel (panel removal) and investigate why it tripped.
Who to ask for: heating / electrical.
What you might notice
Sources
- CTC EcoZenith i255 Installation and Maintenance Manual (400V 3N~/230V 1N~/230V 3~) ↗ · 162 505 67-9 CR01164 2026-05-10 · page 81 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026