LG GR-P207DTU Service Manual ▷ View online
TROUBLE DIAGNOSIS
- 87 -
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).
- 75 -
TROUBLE DIAGNOSIS
CLAIMS.
CAUSES AND CHECK POINTS.
HOW TO CHECK
3. Refrigeration
is weak.
3) Cooling air leak.
4) No cooling air circulation.
Residual
frost.
frost.
No automatic defrosting.
Defrost does not return.
Bad gasket adhestion
Door sag.
Faulty fan motor.
Weak heat from heater.
Bad heater assembly.
Too short defrosting time.
Defrost Sensor.
- Faulty characteristics.
Seat-D(missing, location. thickness).
Structural fault.
Gasket gap.
Air inflow through the fan motor.
Bad insulation of case door.
Sheath Heater - rated.
Heater plate - rated.
Heater cord-L - rated.
Heater plate - rated.
Heater cord-L - rated.
Heater plate
Heater cord-L
Gap.
Bad attachment.
Contraction.
Bad attachment.
Contraction.
Bad adhesion.
Weak binding force at hinge.
Weak binding force at hinge.
Fan motor.
Door switch.
Self locked.
Wire is cut.
Bad terminal contact.
Wire is cut.
Bad terminal contact.
Contact distance.
Button pressure.
Melted contact.
Contact.
Button pressure.
Melted contact.
Contact.
Poor door
attachment.
Door liner
(dimension).
Contraction inner
liner.
Misalignment.
Bad terminal
connection.
P/U liquid leak.
attachment.
Door liner
(dimension).
Contraction inner
liner.
Misalignment.
Bad terminal
connection.
P/U liquid leak.
Faults.
Refrigerator and freezer switch reversed.
Button is not pressed.
Button is not pressed.
No contact to drain.
Loosened stopper cord.
Loosened stopper cord.
Not contact to the
evaporator pipe.
Location of assembly
(top and middle).
evaporator pipe.
Location of assembly
(top and middle).
■
Check the fan motor
conduction: OK.
No conduction: NG.
conduction: OK.
No conduction: NG.
2-4. Cooling
TROUBLE DIAGNOSIS
- 84 -
Problems
Causes
Checks
Measures
Remarks
High
Refrigerant leak.
Check sequence
Weld the leaking part, recharge the
Drier must be replaced.
temperature
1. Check the welded parts of the
refrigerant.
in the freezer
drier inlet and outlet and drier
compartment.
auxiliary in the compressor
compartment (high pressure side).
2. Check the end of compressor
sealing pipe (low pressure side).
3. Check silver soldered parts.
(Cu + Fe / Fe + Fe).
4. Check bending area of wire
condenser pipe in compressor
compartment (cracks can
happen during bending).
5. Check other parts (compressor
compartment and evaporators in
freezer compartment).
Shortage of refrigerant.
Check frost formation on the surface
- Find out the leaking area, repair,
Drier must be replaced.
of evaporator in the freezer
evacuate, and recharge the
compartment.
refrigerant.
- If the frost forms evenly on the
- No leaking, remove the remaining
surface, it is OK.
refrigerant, and recharge new
- If it does not, it is not good.
refrigerant.
TROUBLE DIAGNOSIS
- 85 -
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.