CHECK AND TEST 1

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 10.4 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. On link.

DIAGNOSIS 1

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 2

Perform leakage test on brazed joints in
evaporating area.

DIAGNOSIS 2

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 3


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 gascharging requirements,
on 10.5 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.

GO BACK TO FAULT LIST COOLING