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 freezer drawers.
Step 2
Remove all glass shelves.
Step 3
Unscrew the screws on
air duct.
a. Check the freezer air
duct to find the three
screw covers.
b. Remove the screw
covers (total of three)
on the air duct with
slotted screw driver.
c. Unscrew the screws
(total three) with
Cross-head screw
driver.
Step 4
Dismantle the air duct.
a. Catch the bottom of air duct and pull down the air duct.
b. Pay attention to the connectors when pulling out the air duct.
c. Disconnect the
terminal for fan motor.
Disconnect the
terminal for freezer
temp. sensor.
d. Move the air duct out of the freezer compartment.
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
Install the top side first when installing the air duct.
Tip 4
After pushing air duct into place, you should hear a clicking sound. If not, repeat again.
Tip 5
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
