Gree GMV-VQ680WM/C-X Service Manual page 248

Gree
4.1.3.1 Mechanical Inspection
(1) Confirm that the unit Power is disconnected.
(2) Find the solenoid valve, check whether the fixing screw is loose and whether the valve and coil
have any apparent exceptions.
4.1.3.2 Electrical Inspection
Compare the measured coil resistance with the normal coil resistance to check whether the coil is
damaged.
(1) Power off the unit. Remove the electrical appliance cover after the ODU stops.
Warning: Electric shock
(2) Remove the electrical appliance cover and check whether the connecting terminal of the
solenoid valve is firm.
(3) Disconnect the corresponding valve's coil terminal from the main board and use a multimeter to
measure the coil resistance.
(4) If the measured resistance does not match with that in the following table, the coil needs to be
replaced.
Coil
Oil-return
solenoid valve 1
Oil-return
solenoid valve 2
Low-temperature
oil-return
solenoid valve
Subcooler
solenoid valve
Gas bypass valve
High pressure
valve
Low pressure
valve
Low pressure
bypass valve
Pressure valve
Inlet liquid valve
Gas balance
valve
High pressure
bypass valve
Drain valve
Resistance (Ω)
ODU capacity (HP)
8、10、12 14、16
2085
—
2085
1273
2085
2085
2085
2085
2085
2085
2085
2085
2085
246
GMV6 HR DC Inverter VRF Units Service Manual
18、20,、22
2085
Normal
range of
deviation
±10%
±10%
±10%
±10%
±10%
±10%
±10%
±10%
±10%
±10%
±10%
±10%
±10%