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 page
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 page
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
Note
Reworking procedure showing below is only an
example. This method is suitable for leakage
reworking along the connecting pipe of the cooling
system, regardless of whether it leaks at brazed joints
or not.
PROCEDURE 2
Step 1
Remove all shelves.
Step 2
Remove basket.
Step 3
Remove screw covers.
Step 4
Unscrew.
Step 5
Pull the buttom air duct
out.
Step 6
Disconnect the wires for
thermostat.
Step 7
Take bottom air duct
away.
DIAGNOSIS 3
PROCEDURE 3
Note
Reworking procedure shown below is only an example.
This method is suitable for leakage reworking along the connecting pipe of the cooling
system, regardless of whether it leaks at brazed joints or not.
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 page 435
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
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 dryingfilter.
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.
To get more details
on vacuuming and recharging
requirements,
please go to Annex Page
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
