APP-ERROR on an Aira Heat Pump: Issue with the heat pump system that is not impacting its ability to heat the home and hot water
Short answer
On an Aira heat pump, APP-ERROR means: Issue with the heat pump system that is not impacting its ability to heat the home and hot water. The heat pump keeps running. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Issue with the heat pump system that is not impacting its ability to heat the home and hot water.
Part involved: system (reported via Aira cloud).
Likely causes:
- Not specified (Aira reads errors remotely).
Is it safe?
| Does the heat pump stop? | No |
|---|---|
| Severity | Warning |
| Engineer needed? | Yes |
The heat pump keeps running.
Resetting itself: yes (message disappears when problem resolved).
Manual reset: no.
What you can check
- Read the app message; contact Aira customer support as prompted; check the outdoor unit is not blocked by leaves or snow.
What the engineer will check
- Remote diagnosis by Aira; site visit by Aira technician if needed.
Who to ask for: Aira-employed Clean Energy Technician (R290 heat pump).
Certification: Aira-trained/licensed technician; R290 flammable refrigerant competence for refrigerant work.
What you might notice
Sources
- Aira Outdoor Unit Installation Manual (HPO-AW-6/8-230V-1.0, HPO-AW-12-400V-1.0) ↗ · 1.0 · page p.32 (outdoor manual s.9.2.1); also indoor manual 1.0 p.38, 1.5 p.39, Compact p.37, Get-to-know p.12 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026