YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
YMGI: Your Modern Green Idea
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Labels on the 4-way valve:
D-connects to the exhaust side
E-connects to the evaporator of indoor unit
S-connects to the inhalation side of the liquid separator
C-connects to the condenser
When the system is in cooling mode:
C pipeline is under high pressure and high temperature; E, S pipeline is
under low pressure and low temperature
When the system is in heating mode:
E pipeline is under high pressure and high temperature; C, S pipeline is
under low pressure and low temperature
Because D is connected to the exhaust side, it is under high pressure and high temperature regardless of the
operating mode. When the unit is powered on, in defrosting or oil return mode, the 4-way valve will produce some
noise. Do not touch the pipes directly with your hands and be cautious of hot temperatures.
Step 4:
Check the drive board of compressor, i.e. the IPM module.
Please refer to the IPM checking method in the section of troubleshooting.
Check the drive board of compressor, i.e. the IPM module.
Please refer to the IPM checking method in the section of troubleshooting.
