Gree FGR20/BNa-M Service Manual page 66

7. Recover the electric heating
tape of compressor and discharge
temperature sensor,etc.
8. Check if the compressor rotates in
reverse and if lubricant have leaked
Disassembly and Assembly of 4-way valve
Remark: Make sure that there isn't any refrigerant in pipe system and the power supply is cut off before removal of 4-way valve.
Step
Remove electric coils of 4-way valve
Disconnect the pipe (site D in
illustration) of 4-way valve and
ischarge pipe
Disconnect the pipe (site E in
illustration) of 4-way valve and
connecting pipe
Disconnect the pipe (site C
in illustration) of 4-valve and
connecting pipe
Disconnect the pipe (site S in
illustration) of 4-way valve and
connecting pipe
Remove the 4-way valve
Install new 4-way valve in reversed order and wrap it with wet cloth before welding.
Enwind the bottom of compressor with electric
heating tape and fix it.
Check if the wiring is correct with reference to
circuit diagram and check if there is any leakage
after welding.
Illustration
Place electric coils far away from the 4-way valve
to prevent the connecting line of 4-way valve from
burning when succeeding welding.
Don't leave welding slag inside pipes.
Don't leave welding slag inside pipes.
Don't leave welding slag inside pipes.
Don't leave welding slag inside pipes.
Remove 4-way valve after it is cooled.
Duct Type Split Air Conditioner
Service Manual
Handling Instruction
63