LG GR-P207DTU Service Manual ▷ View online
1. TROUBLE SHOOTING
TROUBLE DIAGNOSIS
- 72 -
CLAIMS.
CAUSES AND CHECK POINTS.
HOW TO CHECK
1. Faulty start
1) No power on outlet.
2) No power on cord.
2) No power on cord.
3) Shorted start circuit.
4) During defrost.
* Measuring instrument :
Multi tester
■
Check the voltage.
If the voltage is within ±85%
of the rated voltage, it is OK.
If the voltage is within ±85%
of the rated voltage, it is OK.
■
Check the terminal
movement.
movement.
■
Check both terminals of
power cord.
Power conducts : OK.
No power conducts : NG
power cord.
Power conducts : OK.
No power conducts : NG
■
Check both terminals of
O.L.P.
If power conducts : OK.
If not : NG.
O.L.P.
If power conducts : OK.
If not : NG.
■
Check the resistance of both
terminals.
At normal temperature 6 :
OK.
If disconnected :
terminals.
At normal temperature 6 :
OK.
If disconnected :
∞
.
Bad connection between adapter and outlet. (faulty adapter)
The Inner diameter of adapter.
The distance between holes.
The distance between terminals.
The thickness of terminal.
The distance between holes.
The distance between terminals.
The thickness of terminal.
Bad connection between plug and adapter (faulty plug).
The distance between pins.
Pin outer diameter.
Pin outer diameter.
No power on
power cord.
power cord.
O.L.P is off.
No electric power on compressor. - Faulty compressor.
Faulty PTC.
Disconnected copper wire.
Faulty terminal contact.
Disconnected.
Capacity of O.L.P is small.
Characteristics of O.L.P is bad.
Bad connection.
Power is
disconnected.
disconnected.
Inner Ni-Cr wire blows out.
Bad internal connection.
Faulty terminal caulking (Cu wire is cut).
Bad soldering.
Bad internal connection.
Faulty terminal caulking (Cu wire is cut).
Bad soldering.
Weak connection.
Short inserted cord length.
Worn out tool blade.
Short inserted cord length.
Worn out tool blade.
Loose contact.
- Large distance between
- Large distance between
male terminal.
- Thin female terminal.
Terminal disconnected.
Bad sleeve assembly.
Power cord is disconnected.
Faulty soldering.
Start automatic defrost.
Cycle was set at defrost when the refrigerator
was produced.
Cycle was set at defrost when the refrigerator
was produced.
Power does not conduct. - Damage.
Bad characteristics. - Initial resistance is big.
Bad connection with
compressor.
compressor.
Bad terminal connection.
Too loose.
Assembly is not possible.
Assembly is not possible.
TROUBLE DIAGNOSIS
- 97 -
Problems
Symptom
Causes
Checks
Measures
Remarks
Bad defrost.
Defrost is not
Defrost lead wire is cut.
Check if defrost lead wire is cut with a
Reconnect Lead
working.
tester.
Wire.
Defective defrost driving relay.
Check the voltage of CON2 (1 and 7)
Replace relay (RY 7
Refer to load
with a tester after pressing main
and RY 3) or PCB.
driving conditions
PCB test switch twice.
check in circuit
If the voltage is normal then it is OK.
explanation.
Defective defrost sensor parts.
Check the resistance of defrost sensor
Replace defrost
Refer to sensor
with a tester.
sensor.
resistance
characteristic
table of circuit
explanation.
Defective
Buzzer
Defective connecting lead wire from
Check lead wire related to door
Repair lead wire.
buzzer
continuously
main PCB to door switch.
switch with a tester.
rings or door
Defective door switch parts.
Refer to door switch in parts repair
Replace door switch.
opening alarm
guide.
does not work.
Defective
Buzzer does
Key input wire is cut or bad connector
Check input wire with a tester.
Reconnect lead
Refer to display
display button
not ring and
terminal contact in main PCB and
wire and replace or
circuit in circuit
key does not
display PCB connecting lead wire.
directly connect bad
explanation.
sense even
contact terminal to
button is
lead wire.
pressed.
Key is continuously depressed due to
Disassemble frame display and confirm
Adjust or replace
structural interference.
visually.
interfering
structures.
TROUBLE DIAGNOSIS
- 98 -
Problems
Symptom
Causes
Checks
Measures
Remarks
Defective
Buzzer rings
Trouble mode indication.
Check trouble diagnosis function.
Repair troubles
Refer to mode
display button.
but key does
indication in
not sense even
function
button is
explanations.
pressed.
Door Buzzer
Buzzer
Defective connecting lead wire from
Check lead wire associated with door
Repair lead wire.
Check model
continuously
main PCB to door switch.
switch.
with dispenser.
rings or door
Defective freezer compartment door
Refer to door switch in parts repair
Replace Freezer
opening alarm
switch parts.
guide.
compartment door
does not work.
switch.
Bad water/ice
Ice and water
Defective connecting lead wire from
Check Lead Wire associated with lever
Repair lead wire.
dispenser.
are not
Main PCB to lever switch.
switch with a tester.
dispensed.
Defective lever switch parts
Refer to door switch in parts repair guide.
Replace lever switch.
Defective photo coupler IC parts.
Check voltage change at photo coupler
Replace photo
output terminals with lever switch
coupler IC or PCB.
pressed. It is OK if voltage change is
between 0V - 5V.
Defective relay associated with ice
Check relay (RY4, RY5, RY12)
Replace defective
dispense (geared motor, cube and
with a tester.
relay.
dispenser solenoid).
Defective parts associated with ice
Check resistance of parts with a tester.
Replace defective
dispense (geared motor, cube and
parts.
dispenser solenoid).
Defective relay associated with water
Check relay (RY7) with a tester
Replace defective
dispense.
relay.
Defective parts associated with water
Check resistance of parts with a tester.
Replace defective
dispenser.
parts.
1. Monitor Panel
1-1. GR-P247, GR-P207, GR-L247, GR-L207
1-2. GR-C247, GR-C207, GR-B247, GR-B207
2. Description of Function
2-1-1. Funnction of Temperature Selection
* The temperature can vary ±3 °C depending on the load condition.
❉
Whenever pressing button, setting is repeated in the order of (Medium)
➝
(Medium Max)
➝
(Max)
➝
(Min)
➝
(Medium Min).
• The actual inner temperature varies depending on the food status, as the indicated setting temperature is a target
temperature, not actual temperature within refrigerator.
• Refrigeration function is weak in the initial time. Please adjust temperature as above after using refrigerator for minimum
2~3 days.
MICOM FUNCTION
- 25 -
TEMP
TEMP
TEMP
TEMP
FRZ TEMP
FRZ TEMP
REF TEMP
REF TEMP
DISPENSER
LOCK
SUPER FRZ
LOCK
SUPER FRZ
LOCK
ON
OFF
ROOM
TEMP
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
LOCK
ON
OFF
ROOM
TEMP
Dispenser selection button.
Temperature adjustment button
for refrigerator compartment.
for refrigerator compartment.
Temperature adjustment button
for freezer compartment.
for freezer compartment.
Super freezer.
Lock button.
Temperature adjustment button
for refrigerator compartment.
for refrigerator compartment.
Temperature adjustment button
for freezer compartment.
for freezer compartment.
Super freezer.
Lock button.
CRUSHED
CUBED
WATER
Division
Power Initially On
1st Press
2st Press
3th Press
4th Press
Setting
temperature
temperature
Temperature
Control
Control
Medium
Medium Max
Max
Min
Medium Min
Freezer Control
-19 °C
-22 °C
-23 °C
-15 °C
-17 °C
Refrigeration
3 °C
2 °C
0°C
6 °C
4 °C
Control
MAX
MIN
FRZ TEMP
MAX
MIN
REF TEMP
MAX
MIN
FRZ TEMP
MAX
MIN
REF TEMP
MAX
MIN
FRZ TEMP
MAX
MIN
REF TEMP
MAX
MIN
FRZ TEMP
MAX
MIN
REF TEMP
MAX
MIN
FRZ TEMP
MAX
MIN
REF TEMP
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