CHECK AND TEST 1
Step 1
Check to see if compressor running time is 100%.
DIAGNOSIS 1
CHECK AND TEST 2
Step 1
Discharge refrigerant: cut off charging tube with pliers.
Step 2
Discharge all refrigerant toward the exhaust vent.
Step 3
Melt brazing material with flame and pull processing tube out with a pair of pliers.
Step 4
Re-braze a copper tube onto processing tube of compressor.
Please find more details
of brazing requirements,
on Annex B1
Step 5
Install quick connector onto re-brazed pipe.
Step 6
Inject nitrogen (1.57Mpa)
through quick connector
into pipe for at least
3 min to blow remaining
refrigerant away.
Step 7
Perform leakage test on brazed joints in compressor niche.
Note
Before performing
this test, disassemble
freezer air duct.
Procedure 1
DIAGNOSIS 2
PROCEDURE 1
Step 1
Pull out the drawers.
Step 2
Take out the shelves.
Step 3
Unscrew the 4 screws.
Step 4
Hold the bottom of air duct and pull it out.
Step 5
Disconnect the terminal of fan motor.
Step 6
Remove air duct.
CHECK AND TEST 3
Perform leakage test on brazed joints in evaporating area.
DIAGNOSIS 3
PROCEDURE 2
Step 1
Clean paint off 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.
Step 5
Inject nitrogen at
1.57Mpa through
quick connector into pipe
and use soapy water to
do leakage test again.
DIAGNOSIS 4
CHECK AND TEST 3
a. Braze a piezometer onto processing tube of compressor.
b. Charge nitrogen to 1.57Mpa through quick connector into pipe.
c. Perform leakage test on brazing points and piezometer.
DIAGNOSIS 4
CHECK AND TEST 4
Try to determine possible leakage point.
DIAGNOSIS 5
PROCEDURE 3
Step 1
Clean paint off 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.
Step 5
Inject nitrogen at
1.57Mpa through
quick connector into pipe
and use soapy water to
do leakage test 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
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.
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
Braze the ends and remove the pliers.
DIAGNOSIS 7
PROCEDURE 5
Tip 1
Before installing the air duct, please tie all wires together.
Tip 2
Before installing the air duct, please fix cord of fan well.
Tip 3
Insert left side first, then other side. Make sure the cavity on the side is aligned with the ribs on inner liner.
Tip 4
Check to see if there is
a wide gap between air
duct and cabinet.
If so, install air duct
again.
