CHECK AND TEST 1

Note


Step 1

Discharge refrigerant: use pliers to cut off charging tube. 

Step 2

Discharge all refrigerant toward the exhaust vent. 

Step 3

Melt brazing material with flame and use a pair of pliers to pull charging tube out. 

Step 4

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

Get more details on brazing requirements, on Annex B1

Step 5

Install quick connector onto rebrazed pipe. 

Step 6

Inject nitrogen of 1.57Mpa through quick connector into pipe. 

Step 7

Leaking test for brazed joints in compressor niche. 

DIAGNOSIS 1


PROCEDURE 1


Step 1

Remove freezer shelf. 

Step 2

Lever 2 screw covers off.

Step 3

Unscrew 2 screws. 

Step 4

Remove air duct:

a. Hold the decorative cover of air duct;

b. Disconnect the terminal of fan motor; 

c. Take air duct away. 

CHECK AND TEST 2


Follow indications in below drawing to test each brazed joint with soapy water in evaporator area behind freezer air duct. 

DIAGNOSIS 2


PROCEDURE 2


Step 1

Clean paint off of brazed joint.


Step 2

Cut off brazed joint with leaking. 

 

Step 3

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

Step 4

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

CHECK AND TEST 3

Step 1

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

DIAGNOSIS 3


CHECK AND TEST 4

Step 1

Weld 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. 

DIAGNOSIS 4


CHECK AND TEST 5


Charge 1.57Mpa Nitrogen into cooling system, and then observe if there is rust and/or spotted holes on pipes of compressor niche and evaporator area.

If yes, please follow below procedures to do the check and rework. 

Step 5

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

DIAGNOSIS 5


PROCEDURE 3


Step 1

Clean paint off of brazed joint.

Step 2

Cut off brazed joint with leaking.

Step 3

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

Step 4

Weld the 2 ends.
Please get more details of brazing
requirements on

CHECK AND TEST 6

Step 1

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

DIAGNOSIS 6


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

Weld a new drying-filter. 

Step 5

Re-braze a copper tube onto processing tube of compressor.
To get more details on brazing requirements,
please go to.

Step 6

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

Step 7

Add quick connector onto processing pipe of drying-filter. 

Step 8

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

Step 9

Vacuum and recharge.

Click below link to get more details for vacuuming and gas- charging requirements, on  Annex B1

Step 10

Block processing pipe twice by locking pliers. 

Step 11

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

Step 12

Weld the ends and remove the pliers. 

PROCEDURE 5


Tip 1

Firstly insert the air duct into the slot at the
bottom.

Tip 2

When reinstalling air duct, move wires out
of the way to prevent crushing with air duct.

Tip 3

After pushing air duct back into position, you
should hear a clicking sound. If there is no
click, please repeat again.

DIAGNOSIS 7


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