Gree FG20/BNa-M, Service Manual

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