Heat pumps · Error codes · Climaveneta / De Longhi Professional
PCB-A6Climaveneta / De Longhi Professional · De'Longhi Professional / Climaveneta i-KI MTD / i-KIR MTD DC-inverter air/water heat pump
PCB-A6 on a Climaveneta / De Longhi Professional De'Longhi Professional / Climaveneta i-KI MTD / i-KIR MTD DC-inverter air/water heat pump: Return (suction) temperature probe error
Short answer
On a Climaveneta / De Longhi Professional heat pump, PCB-A6 means: Return (suction) temperature probe error. 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: Return (suction) temperature probe error.
Likely causes:
- Compressor suction temperature probe.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| 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
- Follow CHECKS/SOLUTION columns on manual pp59-60 (resistance tests >100 kOhm on power module, fuse continuity, probe resistance tables 1-4).
Who to ask for: refrigeration / heat pump engineer.
Certification: Electrical competence for work inside the unit.
What you might notice
Sources
- Climaveneta i-KI MTD / i-KIR MTD (i-EM2 / i-EMR2) 0011m-0061m Installation - User - Maintenance Manual (EN 10/2010) ↗ · EN 10/2010 · page 59 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026