Gree Versati II Series Руководство по эксплуатации - Страница 6
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Test Operation & Troubleshooting & Maintenance
3�2 Comp Low- pressure Protection E3
Comp Low-pressure Protection E3
Check if comp low-pressure switch
Check if the fans stop running or reverse
3�3 Comp Discharge Temp Protection E4
Comp Discharge Temp Protection E4
Measure if the exhaust
temperature of compressor
reaches120℃
Check if the the electronic
expansion valve is blocked
Check if the system has leaked
Repair the leakage of system
pipe and add refrigerant
according to the required volume
is broken or the wiring is loose.
no
no
Check if the system has leaked
no
yes
yes
no
yes
yes
Replace comp
low- pressure or rewire
yes
Check the fans
no
Repair the leakage of system
pipe and add refrigerant
according to the required volume
Measure if the
resistance of temperature
sensor is correct
yes
Replace the mainboard
of AP2
Replace the electronic
expansion valve
The refrigerant of the system is
not enough and add refrigerant
according to the required volume
4
no
Replace the corresponding
exhaust temperature
sensor