E080 on a CTC control system alarm/information platform: Sensor alarm - suction gas sensor: sensor not connected, short-circuited or value outside the sensor range. If the sensor is important to operation the compressor stops
Short answer
On a CTC heat pump, E080 means: Sensor alarm - suction gas sensor: sensor not connected, short-circuited or value outside the sensor range. If the sensor is important to operation the compressor stops. 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: Sensor alarm - suction gas sensor: sensor not connected, short-circuited or value outside the sensor range. If the sensor is important to operation the compressor stops.
Part involved: suction gas sensor.
Likely causes:
- Sensor not connected.
- Sensor short-circuited.
- Sensor value outside its range.
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
| Engineer needed? | Yes |
The heat pump keeps running with some functions stopped.
Resetting itself: Resets automatically after correction for this sensor (listed in manual).
Manual reset: Reset alarm on the display after the fault is rectified.
What you can check
- Note the alarm code/text, the product model and serial number and contact your installer.
What the engineer will check
- Check sensor wiring and connections at the control board.
- Measure sensor resistance against the NTC table in the manual and replace if faulty.
Who to ask for: heat pump controls / electrical.
Certification: Electrical competence for work inside the control panel.
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