PROCEDURE 1
Step 1
Unscrew cover of mainboard with a Cross-head screwdriver.
Step 2
Prize off the connector
buckles.
Step 3
Disconnect the connectors.
Step
Step 4
Unscrew the mainboard.
Step 5
Prize off the buckle to remove mainboard.
Reverse steps above
to install a new
mainboard.
DIAGNOSIS 1
PROCEDURE 1
Step 1
Discharge refrigerant:
1) Use pliers to cut off charging tube.
2) Discharge all
refrigerant toward the
exhaust vent.
Step 2
Unscrew terminal cover.
Step 3
Remove terminal cover.
Step 4
Disconnect all terminals.
Step 5
Unscrew earthing wire.
Step 6
Unscrew nut of compressor.
Step 7
Reverse steps above to
install a new compressor.
Step 8
Braze the joints of suction and exhaust pipes.
Step 9
Re-braze a copper
tube onto compressor
processing tube.
Please get more details of
brazing requirements.
PROCEDURE 2
Step 1
Clean paint off brazed joint of drying-filter.
Step 2
Cut off drying-filter.
Step 3
Cut off capillary and shake to remove the cut end.
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 dryingfilter and processing pipe on compressor.
Step 8
Vacuum and recharge.
Step 9
Block processing pipe twice by locking pliers.
Step 10
Leave locking pliers on the second block and shake to cut off the rest of the pipe.
Step 11
Braze the ends and remove the pliers.
CHECK AND TEST 2
Performance Testing Procedures and Assessment Criteria for TNF Combi
with Electric Air Damper
Performance Testing Procedures and Assessment Criteria for TNF Combi
with Electric Air Damper
Test Conditions
1. Ambient temperature and humidity are the same as natural conditions
2. Sensor positions Close to air outlet
3. Testing time 30 minutes
4. Set freezer at -22
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