GREE         U-Match 5 SERIES UNIT SERVICE MANUAL 
105 
Step 4: Remove the screws on the drive board of the compressor. The screws are located in the white circles 
as shown above in the picture. 
Step 5: Replace with a new compressor drive board. Before replacement, apply some silica gel on the IPM 
module.   
Step 6: Install the new compressor drive board. Fix the screws and connect the wires correctly. 
4.5 Removal of Major Components 
4.5.1 Removal of ODU Major Components   
Picture  Name  Function 
 
Compressor 
Through compression, the low pressure refrigerant occupies a less space. 
As its pressure and temperature both rise, it becomes high pressure and 
high temperature refrigerant. It is the power drive of the system.   
4-way valve  It is used to change directions, the flow of refrigerant in cooling/heating. 
Motor 
The power drive of the fan. It enables the fan to run so as to provide 
smooth currents of air for forced convection an
condenser and evaporator. 
Fan 
It is used to provide smooth currents of air for forced convection and heat 
exchange of condenser and evaporator.