E1 • Gree • Split / GMV
Fault Code E1 Gree: High Pressure — Causes and Repair
On supported Gree ranges, E1 is a high-pressure protection. The code alone does not identify whether airflow, the fan or the refrigerant circuit caused it.
Proof status : Manufacturer reference listed — check model coverage
Source: Gree Outdoor Unit Troubleshooting · Last verified 9 September 2026
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In brief
Fault code E1 on Gree Split / GMV means: On supported Gree ranges, E1 is a high-pressure protection. The code alone does not identify whether airflow, the fan or the refrigerant circuit caused it. Most common cause: Blocked outdoor airflow, an outdoor fan fault or a refrigerant circuit issue may be involved, depending on the model and operating mode. First action: Record the model and look for blocked outdoor air inlets or outlets without opening the unit.. Call a registered engineer if the fault returns after basic checks or involves refrigerant work (F-Gas registered engineer required).
Gree manuals list E1 as high-pressure protection on supported ranges; thresholds and checks vary by model.
What does fault code E1 on Gree mean?
On supported Gree ranges, E1 is a high-pressure protection. The code alone does not identify whether airflow, the fan or the refrigerant circuit caused it.
Blocked outdoor airflow, an outdoor fan fault or a refrigerant circuit issue may be involved, depending on the model and operating mode.
Differences between product ranges
| Range | Meaning | Exclusion |
|---|---|---|
| Documented Gree ranges | High-pressure protection | Confirm limits and checks in the exact model manual |
Symptoms
- Compressor stops after a few minutes
- Outdoor unit is very hot
Safety notice
Do not open the refrigerant circuit. Leak search and charging are for F-Gas registered engineers only.
Diagnosis
1. Accessible visual check
- Record the model and look for blocked outdoor air inlets or outlets without opening the unit.
- Switch the unit off if the outdoor fan is not running; keep hands away from moving parts.
2. Qualified diagnosis
- Have an engineer follow the high-pressure procedure for the exact unit.
- Refrigerant and electrical tests require a qualified professional.
Repair and return to service — Gree fault E1
A qualified engineer checks the system against the exact model manual and repairs the confirmed cause.
When should you call an F-Gas engineer?
Call a professional if the condenser is clean, the fan runs, and E1 returns — suspected overcharge or pressure switch.
Affected models
- Gree ranges with documented E1 high-pressure protection
Field context
The fault may appear when outdoor airflow or fan operation is impaired; check symptoms against the exact unit.
Technical source data
E1 is high-pressure protection on the documented ranges; qualified engineers should use the limits and troubleshooting tree for the exact model.
Sources
- flexx-service-manual-ac-bh.pdf (p. 27)
- gmv6-ultra-heat-mini-heat-pump-service-manual.pdf (p. 40)
Free lookup
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Exact match
E1 — Gree
Split / GMV
On supported Gree ranges, E1 is a high-pressure protection. The code alone does not identify whether airflow, the fan or the refrigerant circuit caused it.
Source : Gree Outdoor Unit Troubleshooting
Possible related codes
Prefix matches only — not a confirmed technical diagnosis.
Frequently asked questions
Can the E1 fault disappear on its own after a reset?
Yes, on first occurrence if the pressure switch closes again, but the fault will return if the cause (dirty condenser, faulty fan, refrigerant overcharge) is not addressed.
Should the outdoor PCB be replaced for a Gree E1 fault?
No, not as a first step: check the pressure switch, wiring, valves and condenser cleanliness. The outdoor PCB is only replaced after mechanical causes have been eliminated.
Does this E1 code apply to Gree heat pumps?
Yes. On a wall-mounted heat pump or Gree air conditioner, E1 signals the same high-pressure protection. The diagnosis (condenser, fan, charge) remains identical.
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