Samsung · Split air conditioners · Samsung WindFree AR50F / AR60F / AR70F (wall-mounted split, R32)
C422EEV or valve close error – self diagnosis
Name in the manufacturer's documentation (service manual): EEV or valve close error – self diagnosis
[1]
In plain words (editorial)
Self-diagnosis detected that the electronic expansion valve or a valve is closed. The service manual first checks whether the low-pressure service valve is fully open, and names refrigerant leaks at the service valve, flare nuts or pipe welds as possible causes.
When to call a service technician: Contact an authorised Samsung service technician.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
For technicians
Possible causes (source text)
Steps given by the manufacturer (source text)
- Is the stop valve of the low pressure side service valve fully open? If not, use a 4 mm hexagonal wrench to fully open the stop valve.[4]
- Remove the power cord, plug it back in 3 seconds, and start cooling operation at the lowest temperature possible.[5]
- PBA check: check if an error has occurred in the indoor display and whether the input voltage of the indoor PBA is normal; replace the PBA if there is any abnormality.[6]
⚠ 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] Samsung – Split-type Air Conditioner Service Manual (indoor AR50F/AR60F/AR70F…C1A…NEU, outdoor …XEU), „GEO WIND FREE EU RS9 25R” (RS9 25R (2025-10-01, wg nazwy pliku)) , p. 20 manufacturer document – copy from a distributor quote verified
EEV OR VALVE CLOSE ERROR-SELF DIAGNOSIS
- [2] Samsung – Split-type Air Conditioner Service Manual (indoor AR50F/AR60F/AR70F…C1A…NEU, outdoor …XEU), „GEO WIND FREE EU RS9 25R” (RS9 25R (2025-10-01, wg nazwy pliku)) , p. 89 manufacturer document – copy from a distributor quote verified
If a leak is found in the service valve or piping connection flare nut part
- [3] Samsung – Split-type Air Conditioner Service Manual (indoor AR50F/AR60F/AR70F…C1A…NEU, outdoor …XEU), „GEO WIND FREE EU RS9 25R” (RS9 25R (2025-10-01, wg nazwy pliku)) , p. 89 manufacturer document – copy from a distributor quote verified
If the leakage part is a PIPE welding part
- [4] Samsung – Split-type Air Conditioner Service Manual (indoor AR50F/AR60F/AR70F…C1A…NEU, outdoor …XEU), „GEO WIND FREE EU RS9 25R” (RS9 25R (2025-10-01, wg nazwy pliku)) , p. 89 manufacturer document – copy from a distributor quote verified
Use a 4mm hexagonal wrench to fully
- [5] Samsung – Split-type Air Conditioner Service Manual (indoor AR50F/AR60F/AR70F…C1A…NEU, outdoor …XEU), „GEO WIND FREE EU RS9 25R” (RS9 25R (2025-10-01, wg nazwy pliku)) , p. 89 manufacturer document – copy from a distributor quote verified
Remove the power cord from the outlet, plug it back
- [6] Samsung – Split-type Air Conditioner Service Manual (indoor AR50F/AR60F/AR70F…C1A…NEU, outdoor …XEU), „GEO WIND FREE EU RS9 25R” (RS9 25R (2025-10-01, wg nazwy pliku)) , p. 89 manufacturer document – copy from a distributor quote verified
Check if the input voltage of the indoor PBA is normal