LG Gr P227 Ytqa Service Manual

							3. When customer uses bottled water.
*If customer wants to use bottled water, extra pump should be installed as shown below.
1. The pump system should not be on the floor (it may cause noise and vibration). Securely fasten the inlet and outlet
nuts of pump.
2. If there is any leakage after installation, cut the water tube at right angle and reassemble.
3. When put the water tube end into the bottle, leave a clearance between bottle bottom and water tube end.
4 Check water coming out and any leakage.
Caution : • If feed tube is more than 4m, less water will come out due to pressure drops.
• Use standard feed tube to prevent leaking.
Outternal Filter
1. Filter Fixation
1) Connect feed tube to the filter outlet and water valve connecting tube.
2) Fix the filter at proper place around the sink where it is easy to replace the filter and to receive the cleaning water. 
Please consider the length of tube shall be less than 8m when locating filter.
2. Filter Cleaning
1) Connect feed tube to the inlet of feed valve and filter.
2) Clean the main valve and feed valve with water for at
least one minute until clean water comes out.
HOW TO INSTALL REFRIGERATOR
- 11 -
Inlet
Outlet
Water Tube
Clip
Connector Type
WaterFilter Filter Inlet
Feed ValveHot Water
Cold Water
 
						

							Install Water Filter (Applicable to some models only)
Before Installing water filter
1. Before installing the filter, take out the top shelf of the
refrigerator after tilting it to the direction () and lifting it
to the direction () and move it to the lower part.
2. Remove the lamp cover by  pressing the protrusion
under the cover and pulling the cover to the front.
Installing water filter
1.Initial installation of water filter
Remove the filter substitute cap by turning it
counterclockwise () by 90 degrees and pulling it down.
Note : Keep it safe to use it later when you do not use the
filter.
Remove the red cap from the filter and attach the
sticker. Insert the upper part of the filter () after
aligning with the guideline marked on the control box,
and fasten it by turning it clockwise by 90 degrees.
Note : Check that the guideline and the fastening
indication line are aligned.
2. Replacement of water filter
While holding the lower part of the filter, turn it
counterclockwise () by 90 degrees and pull it down.
Note : Check that the guideline and the loosening
indication line are aligned.After installing water filter
Reassemble the lamp cover and the top shelf of the
refrigerator. To place the top shelf of the refrigerator, raise
the front part of the shelf a bit so that the hook of the shelf
is fit into the groove.
In order to clean the water filter system, drain water for
about 3 min.
Note : Then open the door of the refrigerator and check for
water droppings on the shelf under the filter.
Aligning with the guide line
and the fastening indication line
Aligning with the guide line
and the loosening indication line
Control box
Control box
Separation
of red cap
Adhesion
sticker
Substitute
cap
HOW TO INSTALL REFRIGERATOR
- 12 -
 
						

							3. How to Control the Amount of Water Supplied to Icemaker.
3-1. Confirm the amount of water supplied to the icemaker.
1. Remove the cover bucket : Lift the cover with a slight twisting.
2. Remove the ice bucket : Lift the lower part slightly and take the ice bucket out slowly.
• Caution :• Do not put your hands or tools into the
chute to confirm the operation of geared
motor. It may damage refrigerator or hurt
your hands.
• Check the operation of motor with its operation
noise.
3. Apply electricity after connecting water pipe.
1) Press test switch under the icemaker for two seconds as shown below.
2) The bell rings(ding~dong) and ice tray rotates and water comes out from the icemaker water tube.
3) The water shall be supplied two or three times into the tray. The amount of water supplied for each time is small. 
Put a water container under the ice tray and press test switch.
4) When ice tray rotates, the water in it will spill. Collect the spilt water and throw away into the sink.
5) When ice tray has finished rotation, water comes out from the water tube. Confirm the amounts of water in the ice tray.
(refer to fig. The optimum amount of water is 80cc)
* It is acceptable if the adjusted level of water is a bit smaller than maximum level.
HOW TO INSTALL REFRIGERATOR
- 13 -
Test Switch Confirm the amount
of water(Recommend: 
the water should 
not be over this 
maximum level line).
Ice maker
 
						

							3-2. Control the amount of water supplied to the icemaker.
Caution :• Please unplug the power cord from the wall outlet and wait for more than three minutes before disconnecting
PCB cover as 310V is applied in the control panel.
1. Disconnect PCB cover from the upper part of the refrigerator.
2. Adjust the amount of water supplied by using DIP switch.
Water Supplying Time Control Option
1) The water supplying time is set at 4.5 seconds when the refrigerator is delivered.
2) The amount of water supplied depends on the setting time and water pressure (city water pressure).
3) If ice cube is too small, increase the water supplying time. This happens when too small water is supplied into the ice tray. 
4) If ice cube sticks together, decrease the water supplying time. This happens when too much water is supplied into the ice tray. 
Caution :When adjusting the amount of water supplied, adjust step by step. Otherwise the water may spill over.
3. When adjustment of control switch for the amount of water supplied is complete, check the level of water in the ice tray.
HOW TO INSTALL REFRIGERATOR
- 14 -
(+) Driver
1
ONSwitch ON
Switch OFF
2
Confirm the amount
of water(Recommend: 
the water should 
not be over this 
maximum level line).
* The quantity of water supplied depends
on DIP switch setting conditions and
water pressure as it is a direct tap water
connection type. (the water supplied is
generally 60 cc to 100 cc)
* DIP switch is on the main PCB. No
DIP SWITCH SETTING
S1 S2
1
2
3
4OFF OFF 4.5 SEC
ON OFF 4.0 SEC
OFF ON 5.5 SEC
ON ON 6.5 SEC
WATER SUPPLY
TIMEREMARKS
 
						

							1. Monitor Panel
1-1. GW-P227, GW-L227
1-2. GW-C227, B227
MICOM FUNCTION
- 15 -
Optional Function display board
Type-1
(88-LED)
Type-2
(Bar-LED)
Type-1
(88-LED)
Type-2
(Bar-LED)
Optional Function display board
 
						

							1-3. Display Second Function
1. Buzzer sound  mute  Mode
The buzzer sound is set to OFF. 
It activates by sounding the recognition sound of “Ding~” after pressing and holding “Express FRZ” button more than 5
seconds. It inactivates when resetting the mode power.
2. Display Power saving Mode 
It places display in standby mode until door is opened.
Press “Freezer” and “Express FRZ” buttons simultaneously to turn all leds become ON and then OFF with the recognition
sound of “Ding~” after 5 seconds. (Be sure not to press only one button to work.) 
Once the mode activates, the display is always OFF. Until door is opened or display button is pressed. When 30 seconds
has elapsed after closing door or pressing button, the display turns OFF. To deactivate this mode is same as the
activation methods. The mode inactivates when resetting the power. 
3. Exhibition Mode
This function is available when exhibiting a refrigerator in the shopping moll. 
Function is inserted with recognition sound “Ding ~” if pressing both the “Express FRZ” button and the “REFRIGERATOR”
button at the same time for more than 5 seconds. If function is inserted, all basic refreezing functions at the R/F room and
the Storage room (COMP, F-FAN, C-FAN) turns off and the display normally operates. However, the dispenser function
normally operates. 
The DEMO stops if pressing the button during DISPLAY DEMO, DEMO stops and the display normally operates but
performs DEMO operation again if not pressing the button again for more than 30 seconds (DEMO: Display scenario
when using the display). 
Release method is same as input method.  
The mode is released if power is reset. 
MICOM FUNCTION
- 16 -
Dispenser selection button
Lock button (3 seconds)
EXPRESS FRZ FREEZER REFRIGERATOR LIGHT/FILTER
Express freezer.
Temperature adjustment button
for refrigerator compartment.Light ON /OFF button / 
Filter reset button (3 seconds)Temperature 
adjustment button
for freezer 
compartment.
 
						

							2. Description of Function
2-1. Funnction of Temperature Selection
* The temperature can vary ±3 °C depending on the load condition. *(      ) : P227, L227
*<    > : C227, B227
1. When power is initially applied or reapplied after power cut, “Medium” is automatically selected.
2. When  the temperature selection switch in the freezer and refrigerator compartments is pressed, the light is on in the
following  sequence:
Middle ➝Middle Strong ➝Strong ➝Weak ➝Middle Weak
3. The temperature setting condition of freezer and refrigerator compartments shall not be indicate in the standard model
(GW-P227, GW-L227, GW-C227, GW-B227) when refrigerator or home bar door is closed.
MICOM FUNCTION
- 17 -
Division Power Initially On 1st Press 2nd Press 3th Press 4th Press
Type-1
(88-LED)
Type-2
(Bar-LED)
-19 °C3 °C-22°C2 °C-23 °C0 °C-15 °C6 °C-17 °C4 °C
Change 
of 
Indication 
Lamp
Temperature
ControlMiddle Middle Strong Strong Weak Middle Weak
(-19.0 °C)

(3.5 °C)
(2.5 °C)
(1.0 °C)
(7.5 °C)
(5.5 °C)
 (-21.5 °C)
(-22.5 °C)
(-14.5 °C)
(-16.5 °C)

Freezer 
Control
Refrigeration
Control
 
						

							2-2. Automatic ice maker
• The automatic ice maker can automatically make 6 pieces of ice cube at a time, 50~60 pieces a day. But these quantities
may be varied according to various conditions including how many times the refrigerator door opens and closes. 
• Ice making stops when the ice storage bin is full. 
• If you don’t want to use automatic ice-maker, change the ice-maker switch to ON-OFF.
If you want to use automatic ice-maker again, change the switch to OFF-ON.
NOTE :It is normal that a noise is produced when ice made is dropped into the ice storage bin.
2-3. When ice maker does not operate smoothly
Ice is lumped together
• When ice is lumped together, take the ice lumps out of the ice storage bin, break them into small pieces, and then place
them into the ice storage bin again. 
• When the ice maker produces too small or lumped together ice, the amount of water supplied to the ice maker need to be
adjusted. Contact the service center. 
✻If ice is not used frequently, it may lump together. 
Power failure
• Ice may drop into the freezer compartment. Take the ice storage bin out and discard all the ice then dry it and place it
back. After the machine is powered again, crushed ice will be automatically selected. 
The unit is newly installed
• It takes about 12 hours for a newly installed refrigerator to make ice in the freezer compartment. 
2-4. Express freezing
1. Express freezing is function to improve cooling speed of the freezing room by consecutively operating compressors and
freezing room fan. 
2. Express freezing is released if power failure occurs and then returns to the original status.
3. Temperature setting is not changed even if selecting the express freezing. 
4. The change of temperature setting at the freezing room or the cold storage room is allowed with express freezing
selected and prrocessed.
5. The cold storage room operates the status currently set with Express freezing selected and procesed.
6. If selecting the Express freezing, the Express freezing function is released after continuously operating compressor and
freezing room fan.
7. If frost removal starting time is arrived during Express freezing, Express freezing operation is done only for the remaining
time after completion of frost removal when the Express freezing operation time passes 90 minutes. If passing 90
minutes, Express freezing operation is done only for 2 hours after completion of frost removal.
8. If pressing Express freezing button during frost removal, the Express freezing LED is turned on but if pressing the
Express freezing, compressor operates after the remaining time has passed.
9. If selection Express freezing within 7 minutes (delay for 7 minutes of compressor) after the compressor stops,
compressor operates after the remaining time has passed.
10. The freezing room fan motor operates at the high speed of RPM during operation of Express freezing.
MICOM FUNCTION
- 18 -
 
						

							2-5. Control of variable type of freezing room fan
1. To increase cooling speed and load response speed, MICOM variably controls freezing room fan motor at the high speed
of RPM and standard RPM.
2. MICOM only operates in the input of initial power or special freezing operation or load response operation for the high
speed of RPM and operates in the standard RPM in other general operation.
3. If opening doors of freezing / cold storage room or home bar while fan motor in the freezing room operates, the freezing
room fan motor normally operates (If being operated in the high speed of RPM, it converts operation to the standard
RPM). However, if opening doors of freezing room or home bar, the freezing room fan motor stops. 
4. As for monitoring of BLDC fan motor error in the freezing room, MICOM immediately stops the fan motor by determining
that the BLDC fan motor is locked or poor if there would be position signal for more than 65 seconds at the BLDC motor.
Then it displays failure (refer to failure diagnosis function table) at the display part of refrigerator, performs re-operation in
the cycle of 30 minutes. If normal operation is performed, poor status is released and refrigerator returns to the initial
status (reset).
2-6. Control of M/C room fan motor
1. The M/C room fan motor performs ON/OFF control by linking with the COMP.
2. It controls at the single RPM without varying RPM. 
3. Failure sensing method is same as in fan motor of freezing fan motor (refer to failure diagnosis function table for failure
display).
2-7. Door opening alarm
1. Buzzer generates alarm sound if doors are not closed even when more than a minute consecutively has passed with
doors of freezing / cold storage room or home bar opened.
2. Buzzer rings three times in the interval of 0.5 second after the first one-minute has passed after doors are opened and
then repeats three times of On/Off alarm in the cycle of every 30 seconds.
3. If all the doors of freezing / cold storage room or home bar are closed during door open alarm, alarm is immediately
released.
2-8. Ringing of button selection buzzer
1. If pressing the front display button, “Ding ~ “ sound rings.
2-9. Ringing of compulsory operation, compulsory frost removal buzzer
1. If pressing the test button in the main PCB, “Phi ~ “ sound rings.
2. In selecting compulsory operation, alarm sound is repeated and completed in the cycle of On for 0.2 second and Off for
1.8 second three times.
3. In selecting compulsory frost removal, alarm sound is repeated and completed in the cycle of On for 0.2 second , Off for
0.2 second, On for 0.2 second and Off for 1.4 second three times.
MICOM FUNCTION
- 19 -
Doors of freezing / 
cold storage room 
or home bar 
BUZZERClosing
Opening
Within
a minuteA minute
30seconds30seconds30seconds
OpeningClosing Closing
3 Times 3 Times 3 Times 3 Times
 
						

							2-10. Frost removal function
1. Frost removal is performed whenever total operation time of compressor becomes 7 ~ 7.5 hour.
2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor
becomes 4 ~ 4.5 hour.
3. Frost removal is completed if temperature of a frost removal sensor becomes more than 5°C after starting frost removal.
Poor frost removal is not displaced if it does not arrive at 5°C even if two hours have passed after starting frost removal.
4. No removal is done if frost removal sensor becomes poor (snapping or short-circuit).
2-11. Sequential operation of built-in product
Built-in products such as compressor, frost removal heater, freezing room fan, Cooling Fan and step motor damper are
sequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot of
parts in applying initial power and completing test.
MICOM FUNCTION
- 20 -
Function Load Operation Sequence Remark
In applying Initial power
TEST MODE
When temperature
of a frost removal
sensor becomes
more than 45°C  
(In purchase,
movement)If error occurs
during operation,
initial operation is
not done.
Sequence of
load operation
when closing 
F-room and 
R-room.
If pressing switch
once more in the
test mode 2 or
temperature of a
frost removal
sensor is more
than 5°C, it
immediately
returns to the test
mode for initial
operation 
(COMP operates
after 7 minutes). When
temperature of a
frost removal
sensor becomes
less than 45°C 
(In power failure,
service)
Test mode 1 
(Compulsory
function)
Test mode 2 
(Compulsory frost
removal)
POWER
ONCOMP
ONF-FAN
&
C-FAN
ONR-STEP
MOTOR
DAMPER
ONHOME
BAR
HEATER
ONMIRACLE
ZONE
STEP
DAMPER
MOTOR
ON
FROST
REMOVAL
HEATER
OFFHOME
BAR
HEATER
ONHOME
BAR
HEATER
OFFFROST
REMOVAL
HEATER
ON DAMPER
&
DUCT DOOR
HEATER
ONDAMPER
&
DUCT DOOR
HEATER
OFF0.3
sec.6
sec.0.3
sec.5
sec.0.3
sec.5
sec.
0.3
sec.
POWER
ON
PIPE
&
DISP
HEATER
ON5
sec.PIPE
&
DISP
HEATER
OFF0.3
sec.COMP
ON0.3
sec.F-FAN
&
C-FAN
ON 0.3
sec.R-STEP
MOTOR
DAMPER
ON0.3
sec.MIRACLE
ZONE
STEP
DAMPER
MOTOR
ON0.3
sec.HOME
BAR
HEATER
ON
TEST
S/W
(PRESS
Once)OTHER
LOAD
OFFCOMP
ONF-FAN
&
C-FAN
ON R-STEP
MOTOR
DAMPER
ONMIRACLE
ZONE
STEP
DAMPER
MOTOR
CLOSE
TEST
S/W
(PRESS
2 Times)COMP
OFFF-FAN
&
C-FAN
OFF FROST
REMOVAL
HEATER
ONR-STEP
MOTOR
DAMPER
CLOSE
0.3
sec.0.3
sec.0.3
sec.0.3
sec.
0.3
sec. 0.3
sec.0.3
sec.0.3
sec.0.3
sec.
0.3
sec.0.3
sec.0.3
sec.