CHECK AND TEST 1

Step 1

Plug in, the compressor starts, but the protection is activated immediately, and it cannot work normally. Put hand onto compressor, no shaking can be felt.

Step 2

Measure the AC voltage of the compressor with a multimeter.

NOTE

DIAGNOSIS 1

CHECK AND TEST 2

Step 1

Wait a few minutes, repeatedly power on and off several times, the compressor starts but activates protection.

DIAGNOSIS 2

CHECK AND TEST 3 

Step 1

Cut off capillary to discharge refrigerant. 

Step 2

Cut off exhaust pipe and suction pipe

Step 3

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

DIAGNOSIS 3

PROCEDURE 1

Step 1

Unscrew terminal cover.

Step 2

Remove terminal cover.

Step 3

Move out protector and starter. 

Step 4

 Unscrew earthing wire.

Step 5

Unscrew nut of compressor.

Step 6

Put on a new compressor and fix nuts onto compressor.

Step 7

Braze the joints of suction and exhasuting pipes.

NOTE

PROCEDURE 2

Step 1

Clean away paint on brazed joint of drying- filter.

Step 2

Cut off drying-filter.

Step 3

Cut off capillary and remove the cut end by shaking.

Step 4

Braze on a new drying-filter.

Step 5

Re-braze a copper tube onto processing tube of compressor. 

Click below link to get more details for brazing requirements, go to Annex B1

NOTE

Step 6

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

Step 7

Add quick connector onto processing pipe of drying-filter.

Step 8

Do leakage test on brazed joints of drying- filter and compressor processing pipe.

Step 9

Vacuum and recharge. 

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

Step 10

Block processing pipe twice with locking pliers.

Step 11

Leave locking pliers on the second block and shake to cut off the rest of pipe.

Step 12

Braze the ends and remove the pliers.

DIAGNOSIS 4

GO BACK TO COMPONENT LIST