CHECK AND TEST 1

Note


Step 1

Discharge refrigerant:
1) Use pliers to cut off charging tube.
2) Discharge all refrigerant toward the exhaust vent.

Step 2

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

Step 3

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

To get more details on brazing requirements, please go to Annex B1

Note

Step 4

Install quick connector onto rebrazed pipe.

Step 5

Inject nitrogen of 1.57Mpa through quick connector into pipe.

Step 6

Test brazed joints in compressor niche for leaks with soapy water.

DIAGNOSIS 1


PROCEDURE 1


Step 1

Clean paint off of brazed joint.

Step 2

Cut off brazed joint with leakage.

Step 3

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

Step 4

Braze the 2 ends. Please get more details of brazing requirements on Annex B1

Note


CHECK AND TEST 2

Step 1

Inject 1.57Mpa nitrogen through quick connector into pipe and apply soapy water to test for leaks again.

Step 2

Check gas leakage with soapy water again at all brazed joints in compressor niche.

DIAGNOSIS 2


PROCEDURE 2


Step 1

Remove all shelves.

Step 2

Remove upper drawers.

Step 3

Remove bottom drawer..


Step 4

Remove drawer cover.  

Step 5

Remove glass shelves under drawers.

Step 6

Prize off the decorative panel and take if off.

Step 7

Unscrew the upper air duct.

Step 8

Pull outward and take off the upper air duct.

Step 9

Unscrew the lower airduct.

Step 10

Disconnect the connectors between airduct and cabinet.

Step 11

Remove the lower air duct.

CHECK AND TEST 3

Step 1

Inject 1.57Mpa nitrogen through quick connector into pipe and check gas leakage behind freezer air duct.

DIAGNOSIS 3


PROCEDURE 3


Step 1

Clean paint off of brazed joint.

Step 2

Cut off brazed joint with leakage.

Step 3

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

Step 4

Braze the 2 ends. Please get more details of brazing requirements on Annex B1

Note


CHECK AND TEST 4

Step 1

Inject 1.57Mpa nitrogen through quick connector into pipe and check gas leakage behind freezer air duct.

DIAGNOSIS 4


CHECK AND TEST 5


Step 1

Braze a piezometer onto processing tube of compressor.

Step 2

Charge nitrogen of 1.57Mpa through quick connector into pipe.

Step 3

Perform leakage test
on brazing points and piezometer to make sure all connection points are in good condition.

DIAGNOSIS 5


PROCEDURE 4


Tip 1

Make sure the sealing sponges are in good condition.

Tip 2

When reinstalling the air duct, fasten the wires to avoid crushing with air duct.

Tip 3

Check to see if there is a wide gap between air duct and cabinet. If there is, reinstall air duct.

PROCEDURE 5


Step 1

Clean paint off of brazed joint of drying filter.

Step 2

Cut off the brazed joint of drying filter.

Step 3

Cut off capillary and remove the cut end by shaking.

Step 4

Braze on a new drying-filter.

Step 5

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

Step 6

Add quick connector onto processing pipe of drying-filter.

Step 7

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

Step 8

Vacuum and recharge.

Step 9

Block processing pipe twice by locking pliers.

Step 10

Leave locked pliers attached to second block and shake to cut off the remaining pipe.

Step 11

Braze the ends and remove the pliers.

CHECK AND TEST 6


DIAGNOSIS 6


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