LG GR-L247ER Service Manual ▷ View online
TROUBLE DIAGNOSIS
- 73 -
Problems
Causes
Checks
Measures
Remarks
High
Cycle pipe is clogged.
Check sequence.
- Heat up compressor discharging
Direr must be replaced.
temperature in
1. Check temperature of condenser
weld joints with touch, disconnect
the freezer
manually.
the pipes, and check the clogging.
compartment.
If it is warm, it is OK.
Remove the causes of clogging,
If it is not, compressor discharging
weld, evacuate, and recharge
joints might be clogged.
the refrigerant.
2. Manually check whether hot line
- If it's warm, it's OK. If it's not,
pipe is warm.
condenser discharging line weld
If it is warm, it's OK.
joints might be clogged.
If it is not, condenser outlet weld
Disconnect with torch, remove the
joints might be colgged.
causes, evacuate, and recharge
seal refrigerant.
Leak at loop pipe weld joint
Check sequence.
Replace the compressor, weld,
Drier must be replaced.
(discharge) in compressor.
1. Manually check whether
evacuate, and recharge refrigerant.
condenser is warm, It is not warm
and the frost forms partly on the
evaporator in the freezer
compartment.
Faulty cooling fan in the compressor
Check sequence.
- Replace if motor does not operate.
compartment.
1. Check cooling fan operation.
- If fan is disconnected, check fan
2. Check that cooling fan is
damage and reassemble it.
disconnected from the motor.
■
Refer to fan motor disassembly
and assembly sequence.
2-5. Defrosting failure
- 74 -
Problems
Causes
Checks
Measures
Remarks
No defrosting.
Heater does not generate heat as
1. Check the resistance of heater.
Heating wire is short and wire is cut.
Seal the
lead wire with
the heating wire is cut or the circuit
0
Ω
: Short.
∞Ω
: Cut.
• Parts replacement: Refer to parts
insulation tape and heat
is shorted.
Tens to thousands
Ω
: OK.
explanations.
contraction tube if the cut
1) Heating wire is damaged when
2. Check the resistance between
lead wire is accessible to
inserting into the evaporator.
housing terminal and heater
repair.
2) Lead wire of heater is cut.
surface.
3) Heating wire at lead wire contacts
0
Ω
: Short.
∞Ω
: Cut.
is cut.
Tens to thousands
Ω
: Short.
Sucking duct and discharging hole
1. Confirm foreign materials. In case
1) Push out impurities by inserting
are clogged:
of ice, insert the copper line
copper wire.(Turn off more than
1. Impurities.
through the hole to check.
3hours and pour in hot water if
2. Ice.
2. Put hot water into the drain
frost is severe.)
(check drains outside).
2) Put in hot water to melt down frost.
3) Check the water outlet.
4)
Push the heater plate to sucking
duct manually and assemble the
disconnected parts.
Gap between Sucking duct and
1. Confirm in the Sucking duct.
1) Turn off the power, confirm
Heater plate(Ice in the gap).
impurities and ice in the gap, and
supply hot water until the ice in the
gap melts down.
2)
Push the Heater plate to drain
bottom with hand and assemble
the disconnected parts.
Wrong heater rating (or wrong
1. Check heater label.
Faults:replace.
assembly).
2. Confirm the capacity after
- How to replace: Refer to main parts.
substituting the resistance value
into the formula.
(V: Rated voltage of user country)
(R: Resistance of tester[
Ω
])
Compare P and lavel capacity.
Tolerance:
±
7%
V
2
P= ––
R
TROUBLE DIAGNOSIS
- 75 -
Problems
Causes
Checks
Measures
Remarks
No defrosting
Melting fuse blows out.
- Check melting fuse with tester. -
Faullty parts: parts replacement.
1) Lead wire is cut.
If 0
Ω
: OK.
- Check wire color when maeasuring
2) Bad soldering.
If
∞Ω
: wire is cut.
resistance with a tester.
Ice in the Sucking duct.
1. Check the inner duct with mirror.
1) Turn power off.
1) Icing by foreign materials in the
2) Raise the front side(door side),
duct.
support the front side legs, and let
2) Icing by cool air inflow through
the ice melt naturally. (If power is
the gap of heater plate.
on, melt the frost by forced
3) Icing by the gap of heater plate.
defrosting.)
2. Check by inserting soft copper
3) Reassemble the heater plate.
wire into the duct (soft and thin
copper not to impair heating wire).
Bad cool air inflow and discharge,
1. Turn on power, open or close the
1) Check the faulty connector of
and bad defrosting due to faulty
door, check that motor fan
housing and reassemble wrongly
contact and insertion (bad connector
operates (If it operates, motor fan
assembled parts.
insertion into housing of heater,
is OK).
2) If the parts are very damaged,
melting, fuse and motor fan).
2. Disconnect parts in the refrigerator
remove the parts and replace it
compartment, check the connection
with a new one.
around the housing visually,
defrost, and confirm heat generation
on the heater. Do not put hands on
the sheath heater.
3. Check the parts which have faults
described in 1, 2 (mechanical
model: disconnect thermostat
from the assembly).
2-6. Icing
- 76 -
Problems
Causes
Checks
Measures
Remarks
Icing in the
1) Bad circulation of cool air.
- Check the food is stored properly
- Be acquainted with how to use.
- Check the defro
st
refrigerator
- Clogged intake port in the
(check discharge and intake port
- Sealing on connecting parts.
related parts if probl
em
compartment.
refrigerator compartment.
are clogged).
- Check the damper and replace
is caused by faulty
- Damper icing.
- Sealing is not good.
- Check icing on the surface of
it if it has defects.
defrosting.
- Pipe icing.
- Too much food is stored and clogs
baffle and cool air path (pipe) after
- Check defrost. (After forced
- Discharging
the discharge port.
dissembling the container box.
defrosting, check ice in the
pipe icing.
- Bad defrosting.
- Check icing at intake ports of
evaporator and pipes.)
freezer and refrigerator
compartment.
2) Faulty door or refrigerator
- Check gasket attached conditions.
- Correct the gasket attachment
- Replacement should
compartment.
- Check door assembly conditions.
conditions and replace it.
be done when it
- Faulty gasket.
- Door assembly and replacement.
cannot be repaired.
- Faulty assembly.
3) Overcooling in the refrigerator
- Check refrigerator compartment
- Replace faulty parts.
compartment.
is overcooled (when button
- Faulty damper in the refrigerator
pressed on "weak").
compartment.
- Check parts are faulty.
- Faulty MICOM (faulty sensor)
4) Bad defrosting
- Check frost on the evaporator
- Check parts related to defrosting.
- Moisture cannot frost
- Heater wire is cut.
after dissembling shroud and fan
- Check defrosting. (Check ice on the
on the evaporator but
- Defective defrost sensor.
grille.
evaporator and pipe.)
can be sucked into the
- Defrosing cycle.
- Check ice on intake port of freezer
refrigerator, being
and refrigerator compartment.
condensed and iced,
interferes with cool air
circulation, and
suppresses sublimation.
5) Customers are not familiar with
- Check food interferes with door
- Be acquainted with how to use.
this machine.
closing.
- Door opens.
- Check ice on the ceilings.
- High temperature, high moisture,
and high load.
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