Heat pumps · Error codes · Cool Energy
AL044Cool Energy · inverTech (R410A, Carel control)
AL044 on a Cool Energy inverTech: Envelope-alarm:High current
Short answer
On a Cool Energy heat pump, AL044 means: Envelope-alarm:High current. 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: Envelope-alarm:High current.
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
- Read and note the code shown on the controller display, then contact your installer or service engineer.
- Check the heat pump's breaker/isolator at the consumer unit is switched on (do not repeatedly reset if it trips).
What the engineer will check
- Check supply voltage, phase presence/rotation and balance.
- Check cabling, terminals and MCB/RCBO sizing.
- Check inverter drive/PFC board.
Who to ask for: heat pump electrical.
Certification: Electrical competence (Part P / qualified electrician).
What you might notice
Sources
- Cool Energy inverTech Monoblock Series Heat Pump Water Heaters - Installation and Users Guide v6.6 (2020) ↗ · Version 6.6 · page 29 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026