CHECK AND TEST 1

Note


Step 1

1)Discharge refrigerant: 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.

Get more details on brazing requirements, on 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 freezer drawers.

Step 2

Remove all freezer shelves.

Step 3

Remove screw covers (total of two) on upper freezer air duct with Slotted Screw Driver.

Step 4

Unscrew screws (total
of two) on upper freezer air duct with Cross-head screw driver.

Step 5

Catch bottom of air duct upper freezer air duct and pull all buckles (total of 8) down.

Step 6

Take out upper freezer air duct by tilting to one side.
Pay attention to the connectors when pulling out the air duct.

Step 7

Disconnect the terminal for fan motor and move upper freezer air duct away.

Step 8

Remove the screw cover on bottom freezer air duct with Slotted Screw Driver.

Step 9

Unscrew the screw on bottom freezer air duct with Cross-head screw driver.

Step 10

Catch bottom of air duct bottom freezer air duct and pull all buckles
(total of 10) down.

Step 11

Take out the lower air duct, tilting to one side.

Step 12

When restoring the upper air duct, fasten the wires to avoid crushing them with air duct.

CHECK AND TEST 3


DIAGNOSIS 3


CHECK AND TEST 4


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 4


PROCEDURE 3


Tip 1:

When restoring the upper freezer air duct, fasten the wires to avoid crushing them with air duct.

Tip 2:

All buckles should be pushed into proper nal position. If not, please repeat installation.

PROCEDURE 4


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 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 compressor processing pipe.

Step 8

Vacuum and recharge.

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

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

 the ends and remove the pliers. 

CHECK AND TEST 5


DIAGNOSIS 5


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