Smeg GW-P227 User manual

CAUTION
PLEASE READ CAREFULLYTHE SAFETY PRECAUTIONS OF THIS BOOK
BEFORE CHECKING OROPERATING THE REFRIGERATOR.
SERVICE MANUAL
http://biz.lgservice.com
Ref No :
GW-L227
Ref No :
GW-P227

WARNINGS AND PRECAUTIONS FOR SAFETY ................................................................................................................ 3
SPECIFICATIONS................................................................................................................................................................... 4
PARTS IDENTIFICATION ........................................................................................................................................................5
HOW TO INSTALL THE REFRIGERATOR ............................................................................................................................ 7
HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR .......................................................................................... 7
HOW TO INSTALL WATER PIPE..........................................................................................................................................8
HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER ......................................................... 12
MICOM FUNCTION .............................................................................................................................................................. 16
ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR ........................................................................... 48
WORKING PRINCIPLES.................................................................................................................................................... 48
FUNCTION OF ICE MAKER .............................................................................................................................................. 49
ICE MAKER TROUBLESHOOTING................................................................................................................................... 52
TROUBLE DIAGNOSIS........................................................................................................................................................ 54
TROUBLE SHOOTING ...................................................................................................................................................... 54
FAULTS .............................................................................................................................................................................. 64
COOLING CYCLE HEAVY REPAIR ................................................................................................................................... 81
HOW TO DEAL WITH CLAIMS.......................................................................................................................................... 88
HOW TO DISASSEMBLE AND ASSEMBLE ....................................................................................................................... 93
DOOR ................................................................................................................................................................................. 93
HANDLE ............................................................................................................................................................................. 94
SHROUD, GRILLE FAN ..................................................................................................................................................... 94
ICEMAKER ......................................................................................................................................................................... 94
WATER VALVE DISASSEMBLY METHOD ........................................................................................................................ 95
FAN and FAN MOTOR DISASSEMBLY METHOD............................................................................................................. 95
DISPENSER ....................................................................................................................................................................... 96
HOME BAR......................................................................................................................................................................... 98
EXPLODED VIEW ................................................................................................................................................................ 99
MICOM CODE ERROR E-LINEAR COMPRESSOR 88LED/LCD........................................................................................ 21
CONTENTS
- 2 -

Please observe the following safety precautions in order to
use safely and correctly the refrigerator and to prevent
accident and danger during repair.
1. Be care of an electric shock. Disconnect power cord
from wall outlet and wait for more than three minutes
before replacing PWB parts. Shut off the power
whenever replacing and repairing electric components.
2. When connecting power cord, please wait for more than
five minutes after power cord was disconnected from the
wall outlet.
3. Please check if the power plug is pressed down by the
refrigerator against the wall. If the power plug was
damaged, it may cause fire or electric shock.
4. If the wall outlet is over loaded, it may cause fire. Please
use its own individual electrical outlet for the refrigerator.
5. Please make sure the outlet is properly earthed,
particularly in wet or damp area.
6. Use standard electrical components when replacing
them.
7. Make sure the hook is correctly engaged.
Remove dust and foreign materials from the housing
and connecting parts.
8. Do not fray, damage, machine, heavily bend, pull out,
or twist the power cord.
9. Please check the evidence of moisture intrusion in the
electrical components. Replace the parts or mask it
with insulation tapes if moisture intrusion was
confirmed.
10. Do not touch the icemaker with hands or tools to
confirm the operation of geared motor.
11. Do not let the customers repair, disassemble, and
reconstruct the refrigerator for themselves. It may
cause accident, electric shock, or fire.
12. Do not store flammable materials such as ether,
benzene, alcohol, chemicals, gas, or medicine in the
refrigerator.
13. Do not put flower vase, cup, cosmetics, chemicals,
etc., or container with full of water on the top of the
refrigerator.
14. Do not put glass bottles with full of water into the
freezer. The contents shall freeze and break the glass
bottles.
15. When you scrap the refrigerator, please disconnect the
door gasket first and scrap it where children are not
accessible.
WARNINGS AND PRECAUTIONS FOR SAFETY
- 3 -

ITEMS SPECIFICATIONS
DIMENSIONS (mm) 894(W) X 753(D) X 1753(H)
NET WEIGHT (kg)
128(P227), 123(L227),119(B227),114(B227)
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR P.T.C. Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
DRIER ID 0.83
CAPILLARY TUBE MOLECULAR SIEVE XH-7
1. Ref No. : GW-P227/L227/C227/B227
ITEMS SPECIFICATIONS
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
ANTI SWEAT HEATER Dispenser Heater
Home Bar Heater
ANTI-FREEZING HEATER Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (1 EA) or 40W (2 EA)
REFRIGERANT R134a (180g)
GW-P227***V R600a (78g)
LUBRICATING
OIL
FREOL @ 10G (310 cc)
GW-P227***V HTS55MT 10CST (190 cc)
SPECIFICATIONS
- 4 -
<Front View> <Plane View>
1753

PARTS IDENTIFICATION
- 5 -
Cover PWB
Water Tube
Home Bar
Dispenser Cover
Assembly
Ice & Water
Dispenser Button
Freezer
Compartment
Refrigerator
Compartment
Milk product corner
Lamp
Shelf
Lamp
Automatic
Icemaker
Shelf or Drawer
Shelf or Drawer
Door rack
Drawer (2 or 3)
Door rack
Lower cover
Shelf
Refreshment center (Optional)
Can Server (Optional)
Egg Box
Vegetable Drawer
(1 or 2)
Door Rack
Wine holder (Plastic or wire)
Door Rack
Conversion switch
(Meats/Vegetables)
(Optional)
Drawer
Snack drawer (Optional)
Shelf (Folding or Normal)
Miracle Zone (Optional)
Fresh compartment
(Optional)
Humidity switch
1. Ref No. : GW-P227/L227(INTERNAL FILTER)
*L227: Non Home bar

2. Ref No. : GW-P227/L227(EXTERNAL FILTER)
PARTS IDENTIFICATION
- 6 -
Dispenser Cover
Assembly
Freezer
Compartment
Refrigerator
Compartment
Milk product corner
Lamp
Shelf
Lamp
Automatic
Icemaker
Shelf or Drawer
Shelf or Drawer
Door rack
Drawer (2 or 3)
Door rack
Lower cover
Shelf
Refreshment center (Optional)
Can Server (Optional)
Egg Box
Vegetable Drawer
(1 or 2)
Door Rack
Wine holder (Plastic or wire)
Door Rack
Conversion switch
(Meats/Vegetables)
(Optional)
Drawer
Snack drawer (Optional)
Shelf (Folding or Normal)
Miracle Zone (Optional)
Fresh compartment
(Optional)
Humidity switch
Cover PWB
Home Bar
Ice & Water
Dispenser Button
*L227: Non Home bar

1. How to Adjust Door Height of Refrigerator
■Make the refrigerator level first. (If the refrigerator is not installed on the flat floor, the height of freezer and refrigerator
door may not be the same.)
1. If the height of freezer door is lower than that of
refrigerator compartment : 2. If the height of freezer door is higher than that of refrigerator compartment :
Insert a driver Binto the groove Aof adjusting screw
and rotate driver in arrow direction (clockwise) until the
refrigerator becomes horizontal.
Insert a driver Binto the groove Aof adjusting screw
and rotate driver in arrow direction (clockwise) until the
refrigerator becomes horizontal.
HOW TO INSTALL REFRIGERATOR
- 8 -



2. Connection to Main Water Supply
Before Installation
1. The icemaker requires the water pressure of 1.5 -
8.5kgf/cm2. (It is acceptable if city water fills a cup of
180cc with water for 3 seconds)
2. Install booster pump where the city water pressure is
below 1.5kgf/cm2for normal operation of water and ice
dispenser.
3. The total length of water pipe shall be less than 12m. Do
not bend the pipe at right angle. If the length is more
than 12m, there will be troubles on water supply due to
water pressure drop.
4. Please install water pipe where there is no heat around.
2-1. Check all correct items (In case of External Filter
Models).
2-2. Connection to the Appliance (In case of External or Internal Filter Models).
HOW TO INSTALL REFRIGERATOR
- 9 -
1 x Connector type Water Filter
2 x Clips
1 x 8mm Water Pipe
Plastic Pipe Connector
Rubber Washer
At the back of the appliance you
will see the water inlet valve.
(See Fig. A)
You now need to cut the water pipe to the right lenght for
connection of the water filter.
It is suggested that approximately 1.5mm of pipe is used
- this should allow the filter to be located in an accessible
position (for periodic replacement) and also allow some
slack in the pipe behind the machine so that it con be
pulled out for cleaning or servicing purposes.
Unscrew the metal thearded
collar and place it over one end
of the water pipe. (See Fig. B)
Firmly push the water pipe onto
the water inlet valve and tighten
up the metal collar. (See Fig. C)
You must also ensure that the cut is square and not
at any sort of angle as this could cause a leak.

2-3. Connection of Water Filter (In case of External Filter Models).
2-4. Connection to the Water Tap (In case of External and Internal Filter Models).
2-5. Water Supply
1) After the installation of feed water, plug the refrigerator
Now you have cut the pipe from the back of the appliance to lenght. It needs to be attached to the water filter. The filter
is marked with with the direction of the water flow (i.e. from tap to fridge).
Just insert tube into the end of the filter that the flow arrow points
until the tube stop. (See Fig. E)
After inserting tube, put together the clip strongly. The clip fix
the tube. (See Fig. F)
Remember however that the connection is being done from the refrigerator to the tap (i.e. the reverse of the water flow when in use).
to the earthered wall outlet, press the water dispenser
button for 2 - 3 minutes, and confirm that the water
comes out.
2) Check leakage at connecting part, then arrange water
tube and locate the refrigerator at its regular place if
there is no leaking.
HOW TO INSTALL REFRIGERATOR
- 10 -
Note the direction markings on the lter!
Repeat on the other end of the filter using the remainder of
the water pipe. (See Fig. H)
Cut the pipe that is connected to the water filter to the correct lenght. Again, make
sure that the cut is nice and square to avoid leaks.
Push the pipe into the smaller hole of the connector supplied in the plumbing
adapter kit. The pipe should be held firm. (See Fig. J)
Place the rubber washer inside the threaded tap connector and screw onto water tap.
CAUTION: feed pipe should be connected to cold water line. If it’s
connected to hot water line, trouble may occur.
If you have connector type filter, put together the clip strongly.
The clip fix the tube. (See Fig. I)
Water Tube
Water Tube
Nut

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 -

■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 (a) and lifting it
to the direction (b) 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 (a) 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 (a) 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 (a) 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
Switch ON
Switch OFF
Confirm the amount
of water(Recommend:
the water should
not be over this
maximum level line).
* The quantity of water supplied depends
on DIP switchsetting 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
1
2
3
4
5
6
7
8
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
WATER SUPPLY
TIME
REMARKS
S1 S2 S3
10 SEC
9 SEC
8 SEC
7.5 SEC
7 SEC
6 SEC
5.5 SEC
6.5 SEC

1. Monitor Panel
1-1. LCD88
1-2. LED88
MICOM FUNCTION
- 15 -
Express freezer.
Light ON /OFF button /
Filter reset button (3 seconds)
Temperature adjustment button
for refrigerator compartment.
Temperature
adjustment button
for freezer
compartment. Dispenser selection button
Lock button (3 seconds)
Dispenser selection button
Lock button (3 seconds)
Temperature
adjustment button
for freezer
compartment.
Express freezer. Temperature adjustment button
for refrigerator compartment.

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 mall.
Function is inserted with recognition sound “Ding ~”if opening the refrigerator or freezer door and 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 -

2. Description of Function
2-1. Funnction of Temperature Selection
MICOM FUNCTION
- 17 -
< 88-LED >
* 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:
Power Initially On
< 88 - LED >
1st Press 2nd Press 3rd Press 4th Press 5th Press 7th Press6th Press 8th Press
Power Initially On
1st Press 2nd Press 3rd Press 4th Press 5th Press 6th Press
F
R
Power
Initially On
1st Press 2nd Press 3rd Press 4th Press 5th Press 7th Press6th Press 8th Press
Division
Type-1
(88-LED)
Change 
of
Indication
Lamp
-19 ¡C
3¡C
-20 ¡C
2¡C
-21 ¡C
1¡C
-22 ¡C
0¡C
-23 ¡C
6¡C
-15 ¡C
5¡C
-16 ¡C
4¡C
-17 ¡C
3¡C
(Power
Initially
ON)
-18 ¡C
2¡C
(1 st Press)
Freezer
Control
Refrigeration
Control
- 19 ¡C 3 ¡C - 20 ¡C 2 ¡C - 21 ¡C 1 ¡C - 22 ¡C 0 ¡C - 23 ¡C 6 ¡C - 15 ¡C 5 ¡C - 16 ¡C 4 ¡C - 17 ¡C 3 ¡C - 18 ¡C 2 ¡C

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
BUZZER
Closing Opening
Within
a minute A minute
30
seconds
30
seconds
30
seconds
Opening Closing 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
ON
COMP
ON
F-FAN
&
C-FAN
ON
R-STEP
MOTOR
DAMPER
ON
HOME
BAR
HEATER
ON
MIRACLE
ZONE
STEP
DAMPER
MOTOR
ON
FROST
REMOVAL
HEATER
OFF
HOME
BAR
HEATER
ON
HOME
BAR
HEATER
OFF
FROST
REMOVAL
HEATER
ON
DAMPER
&
DUCT DOOR
HEATER
ON
DAMPER
&
DUCT DOOR
HEATER
OFF
0.3
sec. 6 sec. 0.3 sec. 5 sec. 0.3 sec. 5 sec.
0.3
sec.
POWER
ON
PIPE
&
DISP'
HEATER
ON
5
sec.
PIPE
&
DISP'
HEATER
OFF
0.3
sec. COMP
ON
0.3
sec. F-FAN
&
C-FAN
ON
0.3
sec.
R-STEP
MOTOR
DAMPER
ON
0.3
sec.
MIRACLE
ZONE
STEP
DAMPER
MOTOR
ON
0.3
sec.
HOME
BAR
HEATER
ON
TEST
S/W
(PRESS
Once)
OTHER
LOAD
OFF
COMP
ON
F-FAN
&
C-FAN
ON
R-STEP
MOTOR
DAMPER
ON
MIRACLE
ZONE
STEP
DAMPER
MOTOR
CLOSE
TEST
S/W
(PRESS
2 Times)
COMP
OFF
F-FAN
&
C-FAN
OFF
FROST
REMOVAL
HEATER
ON
R-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.

TROUBLE DIAGNOSIS
1-1. Error Code Summary
MICOM Error Code
WARNING
!When you check the Resistance values, be sure to turn off the power.
And wait for the voltage-discharge sufficiently.