Gree · Split air conditioners · Gree Pular (wall-mounted split, R32)
E3Low pressure/low system pressure protection/compressor low pressure protection
Name in the manufacturer's documentation (service manual): Low pressure/low system pressure protection/compressor low pressure protection
[1]
In plain words (editorial)
Low-pressure protection of the refrigerant circuit. The service manual lists a damaged low-pressure switch or insufficient refrigerant in the system.
When to call a service technician: Refrigerant work needs a technician with F-gas certification.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
For technicians
Possible causes (source text)
What the device does (source text)
- Cool: compressor, outdoor fan and indoor fan stop operation; Heat: compressor and outdoor fan stop operation at first. About 1 minute later, indoor fan stops operation; 2 minutes later, the 4-way valve stop operation[4]
⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.
The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →
Sources
Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.
- [1] Gree Electric Appliances – Service Manual, wall-mounted R32 GWH..AG.. (Pular) and related (copy from distributor Gree Climat, Ukraine) , p. 100 manufacturer document – copy from a distributor checked manually
Low pressure/low system
- [2] Gree Electric Appliances – Service Manual, wall-mounted R32 GWH..AG.. (Pular) and related (copy from distributor Gree Climat, Ukraine) , p. 100 manufacturer document – copy from a distributor quote verified
Low pressure switch is damaged
- [3] Gree Electric Appliances – Service Manual, wall-mounted R32 GWH..AG.. (Pular) and related (copy from distributor Gree Climat, Ukraine) , p. 100 manufacturer document – copy from a distributor quote verified
Refrigerant inside the system is insufficient
- [4] Gree Electric Appliances – Service Manual, wall-mounted R32 GWH..AG.. (Pular) and related (copy from distributor Gree Climat, Ukraine) , p. 100 manufacturer document – copy from a distributor quote verified
Cool: compressor, outdoor fan and indoor fan stop operation; Heat: compressor and outdoor fan stop operation at first. About 1 minute later, indoor fan stops operation; 2 minutes later, the 4-way valve stop operation