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 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. Before performing

this test, disassemble freezer air duct on link

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 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
Reworking method:
a. Clean paint off brazed joint.

b. Cut off brazed joint with leakage.

c. Use a bigger copper tube to connect 2
ends of brazed joint.
d. Braze the 2 ends.

Follow “Brazed joint distribution diagram &
Filler metal indications” to find out right filler metals.

e. Inject nitrogen at 1.57Mpa through
quick connector into pipe and use soapy
water to do leakage test again.

DIAGNOSIS 4

CHECK AND TEST 4

LEAKAGE IN OTHER
AREAS.

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 5
CHECK AND TEST 5

Try to determine possible leakage point.

DIAGNOSIS 6
PROCEDURE 3
Reworking method:
a. Clean paint off brazed joint.

b. Cut off brazed joint
with leakage.

c. Use a bigger copper tube to connect 2
ends of brazed joint.
d. Braze the 2 ends.

Follow “Brazed joint distribution diagram &
Filler metal indications” to find out right filler metals.

e. Inject nitrogen at 1.57Mpa through
quick connector into pipe and use soapy
water to do leakage test again.

DIAGNOSIS 7
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 8
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 COMPONENT LIST