27
TROUBLE DIAGNOSIS
Items
Precautions
4) Refrigerant Charging
Charge refrigerant while operating a compressor as shown above.
5) Pinch the charging pipe with a pinch-off plier after completion of charging.
6) Braze the end of a pinched charging pipe with copper brazer and test for gas leakage
at the brazed parts.
6. Gas-leakage test
7. Pipe arrangement in
each cycle
* Test for leaks on the welded or suspicious area with an electronic leakage tester.
When replacing components, be
sure each pipe is replaced in its
original position before closing the
cover of the mechanical area.
1-5. Standard Regulations For Heavy Repair
1) Observe the safety precautions for gas handling.
2) Use JIG (or a wet towel) in order to prevent electric wires from burning during welding. (In order to prevent insulation
break and accident.)
3) The inner case will melt and the insulation will burn.
4) The copper piping will oxidize.
5) Do not allow aluminum and copper pipes to touch. (In order to prevent corrosion.)
6) Observe that the inserted length of a capillary tube into a drier should be 12 mm.
7) Make sure that the inner diameter is not distorted while cutting a capillary tube.
8) Be sure that the suction pipe and the filling tube should not be substituted each other during welding. (High efficiency
pump.)
Molecular
Sieves
Molecular
Pipe
Drier
Compressor
Low pressure side
Condenser
Drier
Hot Line
Evaporator
Evaporator
Drain Pipe
3 way valve
High pressure side
