555.3 on a Haier heat pump: Outer circumstance temp. Ta>54°C or Ta<-10°C, refrigeration (cooling) standby
Short answer
On a Haier heat pump, 555.3 means: Outer circumstance temp. Ta>54°C or Ta<-10°C, refrigeration (cooling) standby. The heat pump keeps running with some functions stopped. The wording differs by model range — each is shown below.
Reviewed 23 September 2026 · 2 sources
What it means
On the Super Aqua Monobloc (R32, AU..FYCRA(HW))
The manual says: Outer circumstance temp. Ta>54°C or Ta<-10°C, refrigeration (cooling) standby.
Part involved: ambient/oil temperature, mode setting.
On the Super Aqua Split (R32, AW..SSCHA/SNCHA + HU..WAMNA)
The manual says: outer circumstance temp. Ta>54°C or Ta<-10°C, refrigeration (cooling) standby.
Part involved: ambient/oil temperature.
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Information only |
| Engineer needed? | No |
The heat pump keeps running with some functions stopped.
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 controller mode/temperature/timer settings have not been changed; setup (DIP switch) errors need the installer.
What the engineer will check
On the Super Aqua Monobloc (R32, AU..FYCRA(HW))
- Check the standby reason parameters, the mode setting and the oil heater.
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.
On the Super Aqua Split (R32, AW..SSCHA/SNCHA + HU..WAMNA)
- Check the standby reason parameters.
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
- ATW Service Manual (Super Aqua monobloc) SYJS-03-2019 REV.A ↗ · SYJS-03-2019 REV.A · page p.73 (printed; PDF p.75) · Reviewed 23 September 2026
- Haier HU062WAMNA Service Manual (Super Aqua split R32) ↗ · page p.123 (printed) · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026