Gree GMV-1015WM/G-U, Руководство по обслуживанию

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Gree GMV6 DC Inverter VRF Units Service Manual
160
"J7" Four-way Valve Air
Backflow Protection
Replace the 4-way valve
Yes
Whether the voltage at the output of the
main board is normal? (If the voltage at the output does not
meet requirements, the output voltage of the four-way valve
is 220V when it is energized)
Whether the four-way valve
coil is connected to the main
board properly?
Yes
Confirm that the four-way valve is abnormal
No
Connect them properly and
reliably
No
Replace the main control
board
Whether the difference between
the high pressure and the low pressure of the
unit during operation is greater than 0.1 MPa? At the same
time touch the four-way valve by hand to see whether it is hot or cold. In
cooling mode, E pipe and S pipe are of low temperature and low pressure,
while D pipe and C pipe are of high temperature and high pressure; in
heating mode, D pipe and E pipe are of high temperature and
high pressure, while S pipe and C pipe are
of low temperature and low pressure.
Yes
Yes