NOTE

CHECK AND TEST 1

Step 1

Cut off capillary to discharge refrigerant. 

Step 2

Discharge all refrigerant toward the exhaust vent.

Step 3

Cut off exhaust pipe and suction pipe.

Step 4

Power up the compressor and feel the exhaust pressure from the exhaust pipe with a piece of paper.

DIAGNOSIS 1

PROCEDURE 1

Step 1

Cut off capillary and shake to remove the cut end. 

Step 2

Braze on a new drying- filter.


Step 3

Add quick connector onto processing pipe of drying-filter. 

Step 4

Inject nitrogen (1.57Mpa) through quick connector into pipe.

Step 5

First, cut off the end closed to exhausting end (A in picture)

Step 6

Then, cut off the end closed to suction end, and check whether the pressure is reduced or not.

NOTE

Step 7

Cut off brazed joints, one by one, to find blockage point. 

Every time you cut off one joint, check whether the gas pressure from suction pipe has dropped or not.

DIAGNOSIS 2

NOTE

PROCEDURE 1

Step 1

Use a larger copper tube to connect 2 ends of brazed joint.

Step 2

Braze the 2 ends. Click below link to get more details for brazing requirements, go to Annex B1 

NOTE

PROCEDURE 2

Step 1

Melt brazing material with flame and pull out processing tube using a pair of pliers.

Step 2

Re-braze a copper tube onto compressor processing tube.

Step 3

Install quick connector onto rebrazed pipe.

Step 4

Braze the joints of suction and exhasuting pipes.

Step 5

Inject nitrogen (1.57Mpa) through quick connector into pipe for at least 3 min to blow left refrigerant away.

Step 6

Perform a leakage test on all re-brazed joints of drying-filter and processing pipe on compressor.

Step 7 

Vacuum and recharge. 

Click below link to get more details for vocuuming and gas-charging requirements, go to Annex B2

Step 8

Block processing pipe twice with locking pliers.

Step 9

Leave locking pliers on the second block and cut off the rest of the pipe by shaking.

Step 10

Braze the ends and remove the pliers.

DIAGNOSIS 3

GO BACK TO COMPONENT LIST