760 on an alpha innotec heat pump: Defrosting fault: Defrosting ended 5 times in succession by maximum time (strong wind on evaporator)
Short answer
On an alpha innotec heat pump, 760 means: Defrosting fault: Defrosting ended 5 times in succession by maximum time (strong wind on evaporator). 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: Defrosting fault: Defrosting ended 5 times in succession by maximum time (strong wind on evaporator).
When it shows: Defrosting ended 5 times in succession by maximum time (strong wind on evaporator).
Likely causes:
- Strong wind impinging on evaporator.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: unknown.
Manual reset: manual acknowledgement required (rotary pushbutton 7 s) - display usually says "Please call installer".
What you can check
- Note the error number and text shown on the Luxtronik display.
- Acknowledge the message by pressing the rotary pushbutton for about 7 seconds (as the Luxtronik manual permits); if the same error reappears, contact your installer or ait customer service with the error number.
- Check the heat pump breakers/isolator at the consumer unit are on (do not open any casing).
- Air source units: check the outdoor unit/air inlet and outlet are not blocked by snow, ice, leaves or debris.
What the engineer will check
- Protect fan and evaporator from strong wind.
Who to ask for: heat pump / heating engineer.
What you might notice
Sources
- Operating manual Luxtronik heating and heat pump control Part 2 (UK) 83055400lUK - 2.1 ↗ · 83055400lUK 2.1 · page 53 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026