LG GR-T622DE Service Manual ▷ View online
6. TROUBLESHOOTING
- 10 -
6-1 COMPRESSOR AND ELECTRIC COMPONENTS
1
2
3
4
5
2
5
5
3
5
4
5
5
1
4
3
YES
YES
YES
YES
NO
NO
YES
YES
YES
NO
NO
NO
Power Source.
No Voltage.
(Rating Voltage
±
10%)?
Replace OLP.
Reconnect.
Replace
PTC-Starter.
PTC-Starter.
Replace OLP.
O.K.
Check connection
condition.
condition.
OLP disconnected?
Advise the customer
to use a regular
TRANS.
to use a regular
TRANS.
Replace Compressor.
OLP works within
30 sec. in forcible OLP
operation by turning
instant power on and
off.
30 sec. in forcible OLP
operation by turning
instant power on and
off.
Components start in
the voltage of Rating
Voltage
the voltage of Rating
Voltage
±
10%
below.
Applied voltage isn't
in the range of Rating
Voltage
in the range of Rating
Voltage
±
10%.
Remove the PTC-
Starter from the
Compressor and
measure the voltage
between Terminal C of
Compressor and
Terminals 5 or 6 of PTC.
Starter from the
Compressor and
measure the voltage
between Terminal C of
Compressor and
Terminals 5 or 6 of PTC.
Check the resistance
among M-C, S-C and
M-S in Motor
Compressor.
among M-C, S-C and
M-S in Motor
Compressor.
Check the resistance
of two terminals in
PTC-Starter.
of two terminals in
PTC-Starter.
Check if applying
a regular OLP.
a regular OLP.
Measure minimum
starting voltage after 5
min. for balancing cycle
pressure and cooling the
PTC.
starting voltage after 5
min. for balancing cycle
pressure and cooling the
PTC.
Check the
resistance of
Motor
Compressor.
resistance of
Motor
Compressor.
Check the
resistance of
PTC-Starter.
resistance of
PTC-Starter.
Check OLP.
Check
starting state.
starting state.
- 11 -
6-2 PTC AND OLP
6
5
YES
NO
NO
YES
NO
Cam Shaft
Normal operation of
Compressor is
impossible or poor.
Compressor is
impossible or poor.
Separate the PTC-
Starter from
Compressor and
measure the
resistance between
No. 5 and 6 of PTC-
Starter with a Tester or
Whistone Bridge.
(Figure 21)
Starter from
Compressor and
measure the
resistance between
No. 5 and 6 of PTC-
Starter with a Tester or
Whistone Bridge.
(Figure 21)
Separate the OLP from
Compressor and check
the resistance value
between two terminals
of OLP with a Tester.
(Figure 22)
Compressor and check
the resistance value
between two terminals
of OLP with a Tester.
(Figure 22)
Observation value is
220V/50Hz : 22
220V/50Hz : 22
§
±
30%
115V/60Hz : 6.8
§
±
30%
240V/50Hz : 33
§
±
30%
127, 220V/60Hz : 22
§
±
30%
The resistance value
is 0 or several
hundreds
is 0 or several
hundreds
§
.
The value is
¡˜
.
Check another
electric components.
electric components.
Replace OLP.
Check another
electric components.
electric components.
Replace PTC-
Starter
Starter
Figure 21
Figure 22
Figure 23
Normal operation of
the Defrost Timer is
impossible.
the Defrost Timer is
impossible.
No defrosting.
Poor cooling.
Position the Cam Shaft to
the point of first 'click'
sound and check the
current flowing between
terminals No. 1(brown)
and No. 2(bright orange).
Next, position the Cam
Shaft to the point of
second "click" sound and
check the current flowing
between terminals
No. 1(brown) and
No. 4(black)
(Figure 23).
the point of first 'click'
sound and check the
current flowing between
terminals No. 1(brown)
and No. 2(bright orange).
Next, position the Cam
Shaft to the point of
second "click" sound and
check the current flowing
between terminals
No. 1(brown) and
No. 4(black)
(Figure 23).
Turn the Cam Shaft.
Shake about 3 times
with holding the Cam
Shaft and Body softly.
with holding the Cam
Shaft and Body softly.
The resistance is
¡˜
The resistance is
0
0
§
or variable.
The resistance is about
220V/50Hz : 20K
220V/50Hz : 20K
§
115V/60Hz : 7.8K
§ .
Loud 'click' sound.
Replace the
Defrost Timer.
Defrost Timer.
Replace the
Defrost Timer.
Defrost Timer.
Replace the
Defrost Timer.
Defrost Timer.
Check the another
electric components.
electric components.
Replace the
Defrost Timer.
Defrost Timer.
6-3 DEFROST TIMER
- 12 -
▼
Cooling is impossible
Compressor
doesn't run.
doesn't run.
Running state of
Compressor is poor.
Compressor is poor.
Check a starting
voltage.
voltage.
Check if current flows to
the following
components.
the following
components.
a. Thermostat
b. Starting devices
c. OLP
d. Compressor coil
e. Defrost Timer
f. Circuit parts
Low voltage.
Poor contacting and
gas leakage.
gas leakage.
Shorted or broken.
Poor contacting
or shorted.
or shorted.
Coil shorted.
Poor contacting
or shorted.
or shorted.
Poor contacting
and broken.
and broken.
Shorted.
Lack of capacity.
Coil of motor
Compressor.
Compressor.
Replace
the compressor.
the compressor.
Replace
each component.
each component.
Raise the voltage.
Replace
each component.
each component.
Cause
Check if current flows
to starting devices.
to starting devices.
Check current flowing
in sub-coil of
Compressor.
in sub-coil of
Compressor.
Check capacity of OLP.
The items described
above are normal.
above are normal.
▼
Cooling ability is poor
Fan motor
doesn't run.
doesn't run.
Much frost are sticked
to the EVAPORATOR.
to the EVAPORATOR.
Poor contacting.
Coil is shorted.
Shorted.
Replace
each component.
each component.
Replace
each component.
each component.
Replace
each component.
each component.
Running is poor.
(Coil is shorted.)
(Coil is shorted.)
Check current flowing
of the door S/W.
of the door S/W.
Check current flowing
in the Fan Motor.
in the Fan Motor.
Check the running
condition of Timer.
condition of Timer.
Check current flowing
of the following
components.
• Defrost Thermostat
• Fuse-M
of the following
components.
• Defrost Thermostat
• Fuse-M
Check current flowing
of the following
components.
• L-cord
• TE-Plate Heater
of the following
components.
• L-cord
• TE-Plate Heater
6-4 ANOTHER ELECTRIC COMPONENTS
6-4 SERVICE DIAGNOSIS CHART
- 13 -
COMPLAINT
POINTS TO BE CHECKED
REMEDY
Cooling is
• Is the power cord unplugged from the outlet?
• Plug to the outlet.
impossible.
• Check if the power S/W is set to OFF.
• Set the switch to ON.
• Check if the fuse of power S/W is shorted.
• Replace a regular fuse.
• Measure the voltage of power outlet.
• If voltage is low, wire newly.
Cooling ability
• Check if the set is placed close to wall.
• Place the set with the space of about 10cm.
is poor.
• Check if the set is placed close to stove, gas
• Place the set apart from these heat
•
cooker and direct rays.
•
appliances.
• Is the ambient temperature high or
• Make the ambient temperature below.
•
the room door closed?
• Check if put in is hot.
• Put in foods after cooled down.
• Did you open the door of the set too often
• Don't open the door too often and close
•
or check if the door is closed up?
•
it firmly.
• Check if the Control is set to "COLD (1)".
• Set the control to mid-position.
Foods in the
• Is foods placed in cooling air outlet?
• Place foods in high temperature section.
Refrigerator
•
(Front Part)
are frozen.
• Check if the Dial is set to "COLD (8)".
• Set the dial to "MID (5)".
• Is the ambient temperature below 5
°
C?
• Set the dial to "WARM (1)".
Dew or ice
• Is liquid food stored?
• Seal up liquid foods with wrap.
forms in the
• Check if put in is hot.
• Put in foods after cooled down.
chamber of
• Did you open the door of the set too
• Don't open the door too often and close
the set.
•
often or check if the door is closed up.
•
it firmly.
Dew forms
• Check if ambient temperature and humidity
• Wipe dew with a dry cloth. This occurrence
in the Exterior Case.
of surroumcling air are high.
•
is solved naturally in low temperature and humidity.
• Is there gap in the door packed?
• Fill up the gap.
Abnormal
• Are the set positioned in a firm and even place?
• Adjust the Adjust Screw, and position
noise generates.
•
in the firm place.
• Are any unnecessary objects set
• Remove the objects.
•
in the back side of the set?
• Check if the Drip Tray is not firmly fixed.
• Fix it firmly on the original position.
• Check if the cover of mechanical room
• Place the cover at the original position.
•
in below and front side is taken out.
To close the door
• Check if the door packing is dirty
• Clean the door packing.
is not handy.
•
with filth such as juice.
• Is the set positioned in a firm and even place?
• Position in the firm place and adjust the
•
Adjust Screw.
• Is too much food putted in the set?
• Keep foods not to reach the door.
Ice and foods
• Check if the inside of the set is dirty.
• Clean the inside of the set.
smell unpleasant.
• Did you keep smelly foods without wrapping?
• Wrap smelly foods.
• It smells of plastic.
• The new products smells of plastic, but it is
•
eliminated after 1-2 weeks.
●
In addition to the items described left, refer to the followings to solve the complaint.
Check if dew forms in
the Freezer.
the Freezer.
Replace the
Components of
defrosting circuit.
Components of
defrosting circuit.
Check Refrigerating
Cycle.
Cycle.
Check the
Thermistor
Thermistor
Defrosting
is poor.
is poor.
The cycle
is faulty.
is faulty.
Repair the cycle.
Replace the
Thermistor.
Thermistor.
The operation of
the Thermistor is
poor.
the Thermistor is
poor.
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