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Heat pumps · Error codes · Atlantic
ODU-17FAtlantic · Alféa Extensa + / Extensa Duo + (R410A split, 5-16)

ODU-17F on an Atlantic Alféa Extensa + / Extensa Duo +: Fan motor 2 error (permanent stoppage)

Short answer

On an Atlantic heat pump, ODU-17F means: Fan motor 2 error (permanent stoppage). 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: Fan motor 2 error (permanent stoppage).

Likely causes:

  • Outdoor fan motor fault or blocked fan.

Is it safe?

Does the heat pump stop?Yes
SeveritySafety lockout
Engineer needed?Yes

The heat pump stops until the fault clears or is reset.

What you can check

  • 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

  • Check fan motor, connector and outdoor PCB.

Who to ask for: heat pump / electrical.

Sources

A code explains what the controller detected, not a confirmed root cause.

Reviewed: 23 September 2026