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....

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...

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...

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...

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...

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...

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...

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...

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...

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...