Heat pumps · Error codes · Danfoss
motor-p-fan-errorDanfoss · DHP-AQ
motor-p-fan-error on a Danfoss DHP-AQ: The fan motor protection has deployed
Short answer
On a Danfoss heat pump, motor-p-fan-error means: The fan motor protection has deployed. 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: The fan motor protection has deployed.
Part involved: fan motor protection.
Likely causes:
- Fan motor overload/protection trip (causes not separately tabulated).
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.
Manual reset: Set operating mode OFF then back to the desired mode.
What you can check
- Note the exact alarm text. Check the heat pump's breaker/isolator at the consumer unit is on and has not tripped. Check the outdoor unit is not blocked by snow, ice, leaves or debris and that airflow around it is clear. The manual allows acknowledging by setting operating mode OFF then back once; if the alarm returns, call an engineer.
What the engineer will check
- Check fan rotates freely, fan supply and protection; check EC fan.
Who to ask for: heat pump engineer.
Certification: Qualified electrician / heat pump engineer (electrical fault-finding).
What you might notice
Sources
- Service Instructions DHP-AQ (VMGFJ202) ↗ · VMGFJ202 · page p.10 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026