Heat pumps · Error codes · Climaveneta / De Longhi Professional
A038Climaveneta / De Longhi Professional · De'Longhi Professional / Climaveneta i-KI MTD / i-KIR MTD DC-inverter air/water heat pump
A038 on a Climaveneta / De Longhi Professional De'Longhi Professional / Climaveneta i-KI MTD / i-KIR MTD DC-inverter air/water heat pump: System heat exchanger frost prevention alarm
Short answer
On a Climaveneta / De Longhi Professional heat pump, A038 means: System heat exchanger frost prevention alarm. The manual does not say whether the heat pump stops. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: System heat exchanger frost prevention alarm.
Likely causes:
- Low water flow, dirty filters, air in system.
Is it safe?
| Does the heat pump stop? | Not stated |
|---|---|
| Engineer needed? | Yes |
The manual does not say whether the heat pump stops.
Resetting itself: Reset from room controller: press the two indicated buttons 3 s, select and confirm reset (p57).
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.
- Check the heating system pressure gauge reads in the normal range stated by the installer (usually about 1-1.5 bar cold) and that the filling loop is closed.
What the engineer will check
- Check filters, water flow, air in system.
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 58 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026