Discharge refrigerant:
1) use pliers to cut off charging tube.
2) Discharge all refrigerant toward the
exhaust vent.
Melt brazing material with flame and pull processing tube out using a pair of pliers.
Re-braze a copper tube onto processing tube of compressor.
To get more details on
brazing requirements,
please go to Annex B1
Install quick connector onto rebrazed pipe.
Inject nitrogen of 1.57Mpa through quick connector into pipe.
Test brazed joints in compressor niche for leaks with soapy water.
DIAGNOSIS 1
PROCEDURE 1
Clean paint off of brazed joint.
Cut off brazed joint with leakage.
Use a bigger copper tube to connect 2 ends of brazed joint.
Braze the 2 ends. Please get more details of brazing requirements on Annex B1
CHECK AND TEST 2
Inject 1.57Mpa nitrogen through quick connector into pipe and apply soapy water to test for leaks again.
DIAGNOSIS 2
PROCEDURE 2
PROCEDURE 2
Remove the freezer drawer.
Remove the middle glass shelf located between upper and bottom freezer drawer compartments.
Unscrew 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 all three screws with Cross- head screw driver.
Dismantle the air duct.
a. Catch the bottom of air duct.
b. Pull air duct out from below from the bottom of air duct.
c. Pay attention to the connectors when pulling out the air duct.
d. Disconnect the terminal for fan motor.
e. Disconnect the terminal of temp. sensor.
f. Take the air duct out of the freezer compartment.
DIAGNOSIS 3
PROCEDURE 3
Clean paint off of brazed joint.
Cut off brazed joint with leakage.
Use a bigger copper tube to connect 2 ends of brazed joint.
Braze the 2 ends.
Please get more details
of brazing requirements
on Annex B1
CHECK AND TEST 3
Inject 1.57Mpa nitrogen through quick connector into pipe and apply soapy water to test for leaks again.
DIAGNOSIS 4
CHECK AND TEST 4
Braze a piezometer onto processing tube of compressor.
Charge nitrogen of 1.57Mpa through quick connector into pipe.
Perform leakage test on brazing points and piezometer.
DIAGNOSIS 5
CHECK AND TEST 5
Check to find possible leakage point.
DIAGNOSIS 6
PROCEDURE 4
Clean paint off of brazed joint.
Cut off brazed joint with leakage.
Use a bigger copper tube to connect 2 ends of brazed joint.
Braze the 2 ends. Please get more details of brazing requirements on Annex B1
CHECK AND TEST 6
Inject 1.57Mpa nitrogen through quick connector into pipe and apply soapy water to test for leaks again.
DIAGNOSIS 7
When re-installing the air duct, move the wires out of the way so that they won’t be crushed by air duct.
After pushing air duct into position, it should make a click sound. If no click is heard, do it again.
PROCEDURE 6
Clean paint off of brazed joint of drying filter.
Cut off the brazed joint of drying filter.
Cut off capillary and remove the cut end by shaking.
Braze on a new drying-filter.
Inject nitrogen (1.57Mpa) through quick connector into pipe for at least 3 min to blow remaining refrigerant away.
Add quick connector onto processing pipe of drying-filter.
Do leakage test on brazed joints of drying-filter and processing pipe on compressor.
Vacuum and recharge.
Please get more details
of vacuuming and gas-
charging requirements
on Annex B2
Block processing pipe twice by locking pliers.
Leave locked pliers attached to second block and shake to cut off the remaining pipe.
Braze the ends and remove the pliers.
DIAGNOSIS 9