E111-4 on a Haier Super Aqua R290 Hydro Split / Hydro All-in-One: Fan Motor Loss of Synchronism
Short answer
On a Haier heat pump, E111-4 means: Fan Motor Loss of Synchronism. 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 Loss of Synchronism.
Part involved: DC fan motor and drive.
When it shows: If the position estimation integral is negative (the speed is negative) or the speed is greater than 400 but the current is less than or equal to 10mA, the fan motor will be shut down, and if it tries to start more than 5 times, the fan motor will be shut down, and the drive will enter the out-of-step protection, and the fault will be held for 30 seconds.
Is it safe?
| 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.
Resetting itself: yes.
What you can check
- Note the code shown on the controller and the unit model numbers (on the rating plate label) before contacting your installer.
- Check the heat pump's breaker/isolator at the consumer unit is on; do not open any casing.
- Check the outdoor unit is not blocked by leaves, debris, snow or ice and that nothing is stored against the grilles.
- If the breaker or RCD trips repeatedly, leave the heat pump switched off and call an engineer; do not keep resetting it.
What the engineer will check
- Follow the manufacturer's troubleshooting flowchart for this code.
- Check fan for obstruction and free rotation (isolated).
- Check fan motor connector/wiring and drive board.
Who to ask for: Heat pump engineer.
Certification: Heat pump installer competence; F-gas / flammable-refrigerant (R290/R32) handling competence for any refrigerant-circuit work.
What you might notice
Sources
- R290 Super Aqua Hydro Split & Hydro All in One Service Manual - Service Diagnosis (SYJS-03-2024 REV.A) ↗ · SYJS-03-2024 REV.A · page p.48 (printed; PDF p.6) · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026