Heat pumps · Error codes · Vokèra
12Vokèra · Vokera AriaPRO (R410A inverter)
12 on a Vokèra Vokera AriaPRO: OAT lower than stop-cool limit
Short answer
On a Vokèra heat pump, 12 means: OAT lower than stop-cool limit. The manual does not say whether the heat pump stops.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: OAT lower than stop-cool limit.
Likely causes:
- Not stated in the AriaPRO table; the unit is secured and blocked - wait at least 10 minutes before restart; repeated occurrences require checking unit components.
Is it safe?
| Does the heat pump stop? | Not stated |
|---|---|
| Engineer needed? | No |
The manual does not say whether the heat pump stops.
What you can check
- Read the display; this is a protection/indication state and the manual says the unit returns to normal automatically.
- Keep the heat pump powered in cold weather so frost protection can run.
What the engineer will check
- Not stated in the AriaPRO table; the unit is secured and blocked - wait at least 10 minutes before restart; repeated occurrences require checking unit components.
Sources
- Vokera AriaPRO Installation and Servicing Instructions, booklet cod. R&S 330 Rev. 0 (4/11) ↗ · R&S 330 Rev. 0 · page 29 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026