E081 on a Warmflow heat pump: DC Fan Motor 1 & PCB Communication Error
Short answer
On a Warmflow heat pump, E081 means: DC Fan Motor 1 & PCB Communication Error. 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 · 3 sources
What it means
On the Zeno R290 air source heat pump AS01-R290/AS02-R290/AS03-R290
The manual says: DC Fan Motor 1 & PCB Communication Error.
Part involved: controller/PCB communication.
Likely causes:
- There is a communication error between the fan speed control module and the main board.
On the Zeno A-Series air source heat pump (R32) AS01-R32/AS02-R32/AS03-R32
The manual says: DC Fan Motor Communication Error.
Part involved: controller/PCB communication.
Likely causes:
- There is a communication error between the fan speed control module and the main board.
On the Zeno A-Series air source heat pump (R410A) AS01/AS02/AS03
The manual says: DC Fan Motor Communication Error.
Part involved: controller/PCB communication.
Likely causes:
- There is a communication error between the fan speed control module and the main board.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
What you can check
- Note the exact code shown on the controller (a photo helps) and report it to your installer or the manufacturer's service line.
- Check the heat pump's supply breaker/isolator at the consumer unit is on (do not open any casing).
- Check the controller display is lit and showing the code.
What the engineer will check
- Check the wiring and connection between the fan speed control module and the main board.
Who to ask for: heat pump controls / electrical.
Certification: Electrical competence (Part P / qualified electrician) for work inside control panels.
What you might notice
What owners and engineers report
2 owner and engineer reports mention this.
- Controller / thermostat problem on the Zeno R290 air source heat pump AS01-R290/AS02-R290/AS03-R290: 1 report
- Controller / thermostat problem on the Zeno A-Series air source heat pump (R32) AS01-R32/AS02-R32/AS03-R32: 1 report
Sources
- Warmflow High Efficiency Variable Speed Air Source Heat Pumps A-Series AS01-R290 / AS02-R290 / AS03-R290 - User, Installation & Service Instructions, Guarantee (9009049 Rev D) ↗ · 9009049 Rev D · page 58 · Reviewed 23 September 2026
- Warmflow High Efficiency Variable Speed Air Source Heat Pumps A-Series AS01-R32 / AS02-R32 / AS03-R32 - User, Installation & Service Instructions (9007723 Issue C) ↗ · 9007723 Issue C · page 57 · Reviewed 23 September 2026
- Warmflow High Efficiency Variable Speed Air Source Heat Pumps A-Series AS01 / AS02 / AS03 (R410A Zeno) - User, Installation & Service Instructions (Issue 7) ↗ · Issue 7 · page 50 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026