Er60 on a Climaveneta / De Longhi Professional heat pump: Faulty BT1 water return sensor (automatic reset)
Short answer
On a Climaveneta / De Longhi Professional heat pump, Er60 means: Faulty BT1 water return sensor (automatic reset). The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause. The wording differs by model range — each is shown below.
Reviewed 23 September 2026 · 2 sources
What it means
On the De'Longhi Professional / Climaveneta AWR MTD reverse-cycle air/water heat pump with DHW
The manual says: Faulty BT1 water return sensor (automatic reset).
Likely causes:
- Sensor/wiring.
On the De'Longhi Professional / Climaveneta BWR MTD and MTD2 brine-to-water heat pump
The manual says: Faulty BT1 system water return sensor (automatic reset).
Likely causes:
- Sensor or wiring fault.
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.
What you can check
- Note the code/LED pattern and the model from the rating plate, then contact a heat pump/refrigeration engineer.
- Check the heat pump's breaker/isolator at the consumer unit is on.
What the engineer will check
On the De'Longhi Professional / Climaveneta AWR MTD reverse-cycle air/water heat pump with DHW
- Check connections; replace sensor.
Who to ask for: refrigeration / heat pump engineer.
Certification: Electrical competence for work inside the unit.
On the De'Longhi Professional / Climaveneta BWR MTD and MTD2 brine-to-water heat pump
- Check electrical connections; replace component.
Who to ask for: refrigeration / heat pump engineer.
Certification: Electrical competence for work inside the unit.
What you might notice
Sources
- Climaveneta AWR MTD / AWR MTD/B 0011-0061 Installation - Operating - Service Manual (GB 01/2009) ↗ · GB 01/2009 · page 48 · Reviewed 23 September 2026
- Climaveneta WWR MTD - MTD/S, BWR MTD - MTD/S Installation and User Manual (GB 03/2010) ↗ · GB 03/2010 · page 49 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026