CHECK AND TEST 1
Step 1
Unscrew cover of
mainboard with a
Cross-head screwdriver.
Step 2
area is inserted to final
position.
If not, reinsert it to final
position.
Step 3
Set multimeter to
Step 4
In PCB area, measure the
resistance of freezer temp.
sensor with a multimeter.
Step 5
Take note of value.
Step 6
Measure temperature
of freezer temp. sensor.
Use the measured
temperature to find the
standard resistance value
in Temperature-Resistance
Chart for Sensor.
DIAGNOSIS 1
PROCEDURE 1
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
away.
CHECK AND TEST 2
Step 1
Check if the terminal
is inserted into final
position.
IF NOT, REINSERT IT.
Step 2
Check if the terminal is
stuffed with foam.
IF SO, USE TWEEZERS
TO SMASH IT AND REMOVE.
Step 3
Measure resistance of
freezer temp. sensor from
terminal in freezer air duct
cover.
Step 4
Measure temperature
of freezer temp. sensor.
Use the measured
temperature to find the
standard resistance
value in Temperature-
Resistance Chart for
Sensor.
DIAGNOSIS 2
PROCEDURE 2
Step 1
Disconnect terminals.
Step 2
Remove the aluminium
tape.
Step 3
Unscrew.
Step 4
Use slot screwdriver to
push into buckle, then
prize out upper air duct
and remove.
PROCEDURE 3
NOTE:
CHECK AND TEST 3
Step 1
Set multimeter to
resistance gear.
Step 2
Put detector into one
end of wires in PCB area.
Put another detector into
end of wires behind air
duct.
DIAGNOSIS 3
PROCEDURE 2
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.
CHECK AND TEST 4
Performance Testing Procedures and Assessment Criteria for TNF Upright Freezer.
Test conditions
1. Ambient temperature and humidity are the same as natural conditions
2. Sensor positions Close to air outlet
3. Testing time 45 minutes
4. Set freezer -22 degrees
DIAGNOSIS 5
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