E114 on a Haier Super Aqua R290 Hydro Split / Hydro All-in-One: The input power supply voltage of the inverter is abnormal
Short answer
On a Haier heat pump, E114 means: The input power supply voltage of the inverter is abnormal. 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 input power supply voltage of the inverter is abnormal.
Part involved: compressor, inverter/driver PCB, power supply.
When it shows: If DCBUS voltage < DC160V, alarm. If DCBUS voltage > DC200V, INV control board resumes automatically. If DCBUS voltage > DC430V, alarm. If DCBUS voltage < DC380V, INV control board resumes automatically. The power supply of the inverter controller is interrupted instantaneously.
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.
- 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 supply voltage and phase balance.
- Check compressor windings and inverter/driver PCB per flowchart.
- Check heat-sink cooling and connections.
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