LG Gr P227 Ytqa Service Manual

							TROUBLE DIAGNOSIS
- 81 -
CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK
6. Dew and 
ice formation.
7. Sounds
4) Dew on door.
Dew on the duct door. - Duct door heater is cut.
Dew on the dispense 
recess.
Dew on the door surface. Not fully filled. Surface.
Cormer.
P/U liquid contraction.
Dew on the
gasket surface.
5) Water on the floor.
Dew in the refrigerator compartment.
Defrosted water overflows.              Clogged discharging hose.
Discharging hose         Evaporation tray located at wrong place.
location.
Tray drip. Damaged.
Breaks, holes.
Small Capacity.
Position of drain.
1) Compressor compartment operating sounds.
Compressor sound Sound from machine itself.
inserted. Sound from vibration.
Restrainer.
Rubber Too hard.
seat. Distorted.
Aged.
Burnt.
Stopper. Bad Stopper Not fit
assembly. (inner 
diameter
of stopper).
Tilted.
Not 
Compressor base not connected.
Bad welding compressor stand(fallen).
Foreign materials in the compressor 
compartment.
O.L.P. sound. Chattering sound.
Insulation paper vibration.
Capacitor noise.
Pipe contacts each other. – Narrow interval.
Pipe sound. No vibration damper. Damping rubber-Q.
Damping rubber-S.
Capillary tube unattached.
Recess Heater is cut.
Duct door is open. / Foreign material clogging.
Bad wing adhesion. Wing sag(lower part).
Door liner shape mismatch.
Corner. Too much notch.
Broken.
Home Bar heater is cut.
Liquid shortage.
Liquid leak.
 
						

							TROUBLE DIAGNOSIS
- 82 -
CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK
7. Sounds
1) Compressor compartment operating sounds.
Transformer 
sound.
Drip tray vibration sound.
Back cover machine sound.
Condenser drain sound.
2) Freezer compartment sounds.
Fan motor sound.
Sounds from fan
contact.
Unbalance fan sounds.
Motor shaft
contact sounds.
Resonance.
Evaporator noise.
3) Bowls and bottles make contact on top shelf.
4) Refrigerator roof contact.
5) Refrigerator side contact.
6) Insufficient Lubricants on door hinge.
Its own fault. –– Core gap.
Bad connection. –– Correct screw connection.
Bad assembly.
Distortion.
Foreign materials inside.
Bad connection.
Partly damaged.
Not connected.
Bad pipe caulking.
Normal operating sound.
Vibration sound.
Aged rubber seat.
Bad torque for assembling motor
bracket.
Fan guide contact.
Shroud burr contact.
Damping evaporator contact.
Residual frost contact.
Unbalance.
Ice on the fan. –– Air intake (opposite to motor
rubber assembly.)
Supporter disorted.
Tilted during motor assembly.
Evaporator pipe contact. –– No damping evaporator.
Sound from refrigerant. –– Stainless steel pipe shape in
accumulator.
Sound from fin evaporator and pipe during expansion
and contraction.Poor treatment Cord heater.
Narrow evaporator interval.
Surface machining conditions.
Fan distortion.
Misshappen.
Burr.
 
						

							TROUBLE DIAGNOSIS
- 83 -
CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK
8. Faulty lamp
(freezer and
refrigerator
compartment).
9. Faulty internal 
voltage(short).
1) Lamp problem. Filament blows out.
Glass is broken.
2) Bad lamp assembly. Not inserted.
Loosened by vibration.
3) Bad lamp socket.
Disconnection. Bad soldering.
Bad rivet contact.
Short. Water penetration.     Low water
level  in tray.
Bad elasticity of contact.
Bad contact(corrosion).
4) Door switch. Its own defect.
Refrigerator and freezer switch is reversed.
Travlel distance.
Bad connection.
Bad terminal contact.
P/U liquid leak..
1) Lead wire is damaged.
Wire damage when assembling  P.T.C. Cover.
Outlet burr in the bottom plate.
Pressed by cord heater. lead wire, evaporator pipe.
2) Exposed terminal.
Compressor Compartment terminal. - Touching other
components.
Freezer compartment terminal. - Touching evaporator pipe.
3) Faulty parts.
Transformer. Coil contacts cover.
Welded terminal parts contact cover.
Compressor. Bad coil insulation.
Plate heater.
Melting fuse. Sealing is broken. Moisture penetration.
Cord heater. Pipe damaged. Moisture penetration.
Bad sealing.
Sheath heater.
Connect conduction and
non-conduction parts and
check with tester. 
Conduction: NG.
Resistance∞: OK.
 
						

							TROUBLE DIAGNOSIS
- 84 -
CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK
10. Structure, 
appearance
and others.
1) Door foam.
Sag.
Noise during
operation.
Malfunction.
2) Odor.
Temperature of 
refrigerator
compartment.
Deodorizer.
Food Storage.
Others.
Weak torque of
hinge connection.
Weak gasket
adhesion.
Fixed tape.
Hinge interference.
Not closed Interference between door liner and inner liner.
Refrigerator
compartment is 
opened when freezer
compartment is 
closed (faulty stopper).
High. Faulty damper control.
Button is set at weak.
Door is open (interference by
food).
No deodorizer.
Poor capacity.
Seal condition.
Store special odorous food.
Long term storage.
Odors from chemical procucts.Bigger door foam.
Hinge-Pin tilted-Poor flatness.
No washer.
No grease and not enough
quantity.
Stopper worn out.
Bad freezer compartment door
assembly.
No stopper. Bolt is loosened during
transportaion.
Not tightly fastened.
Screw worn out .
Adhesion surface.
Not well fixed.
 
						

							2. Faults
2-1. Power
2-2.  Compressor
TROUBLE DIAGNOSIS
-85-
Problems Causes Checks Measures Remarks
No power on  - Power cord cut. - Check the voltage with tester. -Replace the components.
outlet. - Faulty connector insertion. - Check visually. -Reconnect the connecting parts.
- Faulty connection between plug - Check visually. - Reconnect the connecting parts.
and adapter.
Fuse blows out. - Short circuit by wrong connection. - Check the fuse with tester - Find and remove the cause of  - Replace with rated
- Low voltage products are  or visually. problem(ex. short, high voltage,  fuse after confirming
connected to high voltage. - Check the input volt are with tester low voltage).   its specification.
- Short circuit by insects. (between power cord and products). - Replace with rated fuse.
- Electricity leakage. - Check the resistance of power cordIf fuse blowns out
- High voltage. with testerf (if it is 0Ω, it is shorted). frequently, reconfirm
- Short circuit of componentsthe cause and prevent.
(tracking due to moisture and dust
penetration).
Problems Causes Checks Measures Remarks
Compressor - Faulty PTC. - Check the resistance. - If resistance is infinite, replace it
does not  Vlaue:∞is defective. with new one.
operate.- If it is not infinite, it is normal.
- Check other parts.
- Compressor is frozen. - If compressor assembly parts are  - During forced operation:
normal(capacitor, PTC, OLP),  - Operates: Check other parts.
apply power directly to the  - Not operate: Replace the frozen
compressor to force operation. compressor with new one, weld, 
evacuate, and recharge refrigerant.
OLP          It starts as soon as it is • Refer to weld repair procedures.
contacted.
Auxiliary winding
Main winding
Power
 
						

							2-3. TemperatureTROUBLE DIAGNOSIS
-86-
Problems Causes Checks Measures Remarks
High  Poor cool air circulation due to faulty - Lock –– Check resistance with a  - Replace fan motor.
temperature fan motor. tester. 
in the freezer 0Ω: short.
compartment.∞Ω: cut. - Reconnect and reinsert.
- Rotate rotor manually and check 
rotation.
- Wire is cut.
- Bad terminal contact: Check  - Maintain clearance and remove ice
terminal visually. (Repair and/or replace shroud if fan
- Fan constraint. – Fan shroud  is constrained by shroud 
contact: Confirm deformation).
visually.
– Fan icing:
Confirm visually.
Faulty fan motor due to faulty door  - Iced button (faulty) operation: - Confirm icing causes and repair.
switch operation. Press button to check - Replace door switch.
- Faulty button pressure and contact:
Press button to check operation.
- Door cannot press door switch  - Door sag: fix door.
button: Check visually. - Door liner bent:replace door or
attach sheets.
Bad radiation conditions in  - Check the clearance between the  - Keep clearance between  - The fan may be 
compressor compartment. refrigerator and wall (50 mm in  refrigerator and walls (minimum  broken if cleaning 
minimum). 50mm). performs while the 
- Check dust on the grill in  - Remove dust and contaminants  refrigerator is on.
compressor compartment. from grill for easy heat radiation.
- Check dust on the coils condenser. - Remove the dust with vacuum 
cleaner from the coils condenser 
while the refrigerator is off.
 
						

							2-4. CoolingTROUBLE DIAGNOSIS
-87-
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
-88-
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 its warm, its OK. If its not, 
pipe is warm. condenser discharging line weld 
If it is warm, its 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 failureTROUBLE DIAGNOSIS
-89-
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 0Ω: 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 0Ω: 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%V2P= ––
R
 
						

							TROUBLE DIAGNOSIS
-90-
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 0Ω: 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 connectionwith 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).