Gree Aircon 55 / 56 / 57 / 58 Error Code
Capture the Gree 55 / 56 / 57 / 58 fault correctly, then see what should be checked before parts are quoted. Match the displayed code to the affected unit; each code identifies Unit A, B, C, or D.
What does Gree 55 / 56 / 57 / 58 mean?
Gree 55 / 56 / 57 / 58 is listed as unit A communication wire misconnection or expansion valve malfunction, unit B communication wire misconnection or expansion valve malfunction, unit C communication wire misconnection or expansion valve malfunction, and unit D communication wire misconnection or expansion valve malfunction in Multi-Split, Wall-Mounted Split, Ceiling Cassette rows such as Multi GEN2 wall mount, Multi GEN2 cassette. This meaning comes from the manufacturer's own diagnostic material. These grouped codes share one fault family but identify different units; use the displayed code to select the Unit A, B, C, or D row. Confirm the displayed code and affected unit before accepting a parts quote.
Choose the listing that matches your unit
The same code has more than one listed meaning. Match the model family, the system type and the unit that shows the code before approving parts.
| Code | What it means | What to check first |
|---|---|---|
| 55 | Unit A communication wire misconnection or expansion valve malfunction | Match this meaning to your installed model and the unit that shows the code, then use the checks below. |
| 56 | Unit B communication wire misconnection or expansion valve malfunction | Match this meaning to your installed model and the unit that shows the code, then use the checks below. |
| 57 | Unit C communication wire misconnection or expansion valve malfunction | Match this meaning to your installed model and the unit that shows the code, then use the checks below. |
| 58 | Unit D communication wire misconnection or expansion valve malfunction | Match this meaning to your installed model and the unit that shows the code, then use the checks below. |
- Code
- 55
- What it means
- Unit A communication wire misconnection or expansion valve malfunction
- What to check first
- Match this meaning to your installed model and the unit that shows the code, then use the checks below.
- Code
- 56
- What it means
- Unit B communication wire misconnection or expansion valve malfunction
- What to check first
- Match this meaning to your installed model and the unit that shows the code, then use the checks below.
- Code
- 57
- What it means
- Unit C communication wire misconnection or expansion valve malfunction
- What to check first
- Match this meaning to your installed model and the unit that shows the code, then use the checks below.
- Code
- 58
- What it means
- Unit D communication wire misconnection or expansion valve malfunction
- What to check first
- Match this meaning to your installed model and the unit that shows the code, then use the checks below.
What to do now
Use these steps before customer action, a signal-wire check, or PCB quote.
Stop using the unit if 55 / 56 / 57 / 58 returns
If 55 / 56 / 57 / 58 remains displayed or returns during operation, do not attempt a reset the manufacturer does not list; arrange diagnosis.
No manufacturer reset steps listed for 55 / 56 / 57 / 58
Capture the complete 55 / 56 / 57 / 58 display and model stickers first. The manufacturer lists no customer reset procedure; do not treat a generic power-cycle as manufacturer guidance.
Send these to us
55 / 56 / 57 / 58 error code, a clear display photo, Gree model stickers, affected rooms, operating state when the code appeared, and whether one room or every room failed
Guidance for your model
Notes that match the code to your exact model. Electrical, refrigerant, wiring, resistance and component checks are for a technician.
| Detail | What it says |
|---|---|
| Diagnostic note | Check communication wire assignment and expansion valve operation for Unit A. |
| Diagnostic note | Check communication wire assignment and expansion valve operation for Unit B. |
| Diagnostic note | Check communication wire assignment and expansion valve operation for Unit C. |
| Singapore / model note | Official GREE Multi GEN2 service-manual row from the malfunction status sheet. Use for matching multi-zone outdoor and connected indoor style before treating it as final. |
- Detail
- Diagnostic note
- What it says
- Check communication wire assignment and expansion valve operation for Unit A.
- Detail
- Diagnostic note
- What it says
- Check communication wire assignment and expansion valve operation for Unit B.
- Detail
- Diagnostic note
- What it says
- Check communication wire assignment and expansion valve operation for Unit C.
- Detail
- Singapore / model note
- What it says
- Official GREE Multi GEN2 service-manual row from the malfunction status sheet. Use for matching multi-zone outdoor and connected indoor style before treating it as final.
What to check before repair
Use this split to separate safe evidence capture from the tests a technician should prove before quoting parts.
| You can check | Technician should confirm |
|---|---|
| Before taking any system action on 55 / 56 / 57 / 58, take a clear display photo. | Match 55 / 56 / 57 / 58 against your model family's listing before parts are quoted. |
| Capture the Gree indoor and outdoor model stickers so the correct family row is used. | Test communication terminals, cable continuity, polarity, and outdoor power. |
| The manufacturer lists no customer reset procedure for this code. Note whether one room, several rooms, or the whole system is affected. | Read indoor and outdoor PCB indicators only after the signal path is proven sound. |
- You can check
- Before taking any system action on 55 / 56 / 57 / 58, take a clear display photo.
- Technician should confirm
- Match 55 / 56 / 57 / 58 against your model family's listing before parts are quoted.
- You can check
- Capture the Gree indoor and outdoor model stickers so the correct family row is used.
- Technician should confirm
- Test communication terminals, cable continuity, polarity, and outdoor power.
- You can check
- The manufacturer lists no customer reset procedure for this code. Note whether one room, several rooms, or the whole system is affected.
- Technician should confirm
- Read indoor and outdoor PCB indicators only after the signal path is proven sound.
Wiring or PCB decision
Gree 55 / 56 / 57 / 58 should start with terminal, signal-cable, and power checks. PCB replacement only makes sense after the communication path is proven sound.
A loose terminal or bad junction is a targeted repair once the path is confirmed.
Signal-wire replacement depends mostly on access through trunking, ceiling, or concealed routes.
PCB cost should be weighed against age only after wiring and power checks pass.
Gree 55 / 56 / 57 / 58 questions
What does the Gree 55 / 56 / 57 / 58 error mean?
Can I fix a Gree 55 / 56 / 57 / 58 error myself?
Is it safe to keep running the aircon with a 55 / 56 / 57 / 58 error?
What causes a Gree 55 / 56 / 57 / 58 error?
Will a Gree 55 / 56 / 57 / 58 error need a repair or a full replacement?
What should I send a technician about a Gree 55 / 56 / 57 / 58 error?
Confirm the fault
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Read next
Use these if the quote mentions the parts, checks, or repair path this code points to.