ODU1-15F on an Atlantic heat pump: Compressor start up error (permanent stoppage)
Short answer
On an Atlantic heat pump, ODU1-15F means: Compressor start up error (permanent stoppage). The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause. The wording differs by model range — each is shown below.
Reviewed 23 September 2026 · 2 sources
What it means
On the Alféa Excellia / Excellia Duo (R410A split, 11-16, pre-A.I.)
The manual says: Compressor start up error (permanent stoppage).
Likely causes:
- Compressor start/position detection or motor control fault.
On the Alféa Hybrid Duo (heat pump + integrated fuel-oil boiler)
The manual says: Upper fan motor faulty.
Likely causes:
- Outdoor fan motor fault or blocked fan.
Is it safe?
On the Alféa Excellia / Excellia Duo (R410A split, 11-16, pre-A.I.)
| Does the heat pump stop? | Yes |
|---|---|
| Severity | Safety lockout |
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
On the Alféa Hybrid Duo (heat pump + integrated fuel-oil boiler)
| Does the heat pump stop? | Yes |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
What you can check
On the Alféa Excellia / Excellia Duo (R410A split, 11-16, pre-A.I.)
- Check the heat pump isolator and consumer-unit breakers are on (do not open any casing).
- Note the error number/LED pattern shown and give it to your installer.
On the Alféa Hybrid Duo (heat pump + integrated fuel-oil boiler)
- Check the outdoor unit is not blocked by leaves, debris or snow.
- Check the heat pump isolator and consumer-unit breakers are on (do not open any casing).
- Note the error number/LED pattern shown and give it to your installer.
What the engineer will check
On the Alféa Excellia / Excellia Duo (R410A split, 11-16, pre-A.I.)
- Check compressor wiring, windings and inverter/IPM board.
Who to ask for: refrigeration / electrical.
Certification: Electrical competence; F-gas if compressor replacement.
On the Alféa Hybrid Duo (heat pump + integrated fuel-oil boiler)
- Check fan motor, connector and outdoor PCB.
Who to ask for: heat pump / electrical.
Sources
- alféa excellia duo Maintenance Document (U0546279_1738_EN_16) ↗ · U0546279_1738_EN_16 · page 72 · Reviewed 23 September 2026
- alféa hybrid duo Installation and commissioning instructions (doc 1440-13) ↗ · 1440-13 · page 66 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026