Videocon VZ34 User manual

FROST FREE REFRIGERATOR
Service manual
VZ34/VZ29/VZ26

CONTENTS
SAFETY PRECAUTIONS ...............................................................................................8
SERVICING PRECAUTIONS.......................................................................................19-22
DISASSEMBLY..............................................................................................................8-13
COMPRESSOR ADJUSTMENT......................................................................................13
TROUBLESHOOTING...................................................................................................22-26
TEMPERATURE CONTROLS ..........................................................................................26
MICOM FEATURE CONTROLS............. .....................................................................14-17
PCB DETAILS..............................................................................................................27-36
RESISTANCE CHARACTERISTICS ................................................................................36
EXPLODED VIEW & PART DETAILS............................................................................4-7
RELAY ADJUSTMENT.................................................................................................18-19
SPECIFICATIONS..........................................................................................................1-3

VIDEOCON REF FF250L VIDEOCON REF FF280L VIDEOCON REF FF330L
MODEL-VZ26 MODEL-VZ29 MODEL-VZ34

1
SPECIFICATIONS
250L Models:
SPECIFICATIONS
723
610
1450
FAN COOLING
REFRIGERATOR PCB CONTROL
FREEZER PCB CONTROL
AUTOMATIC
HEATER DEFROST
PCM/ VCM
TEXTURED PCM
ABS
PU FOAM (Cyclopentane)
HEATER
R600a
TRANSPARENT SHELF
VEGETABLE CRISPER
CRISPER COVER
BOTTLE SUPPORTER
SOFT VEG CRISPER
DAIRY POCKETS
EGG TRAY
BOTTLE SHELF
CAN SHELF
ICE MAKER
ICE TRAY
FROZEN TRAY
RELAY START TYPE
FIN TYPE
SKIN TYPE
12V, 2W, 2500RPM
LG 330MD3 33 Ω ± 20%@25C
JIAXIPERA QP2-15L01/
QPS2-B15MD3 9~19Ω@25C
220-240V, 50 Hz
LG CMA089NAEM 14.4 ± 10% Ω (Sub)@25C
20.6 ± 5% Ω (Main)@25C
JIAXIPERA TX1113Y 19.8±10%Ω (Sub)@25C
16.8±10% (Main)@25C
12V, 100PPS
230V, 170W
73C, 250V
HEATER RATING
THERMAL FUSE RATING
RELAY RATING
COMPRESSOR STARTUP RANGE
COMPRESSOR MOTOR RATING
DAMPER RATING
COMPRESSOR
EVAPORATOR
CONDENSER
FAN MOTOR RATING
REFRIGERATOR COMPARTMENT
DOOR POCKETS
FREEZER COMPARTMENT
INNER CASE
INSULATION
DEFROSTING SERVICE
REFRIGERANT
DEFROSTING SYSTEM
DOOR FINISH
OUT CASE
ITEMS
TEMPERATURE CONTROL
DEPTH
WIDTH
HEIGHT
COOLING SYSTEM

SPECIFICATIONS
2
280L Models:
SPECIFICATIONS
723
610
1560
FAN COOLING
REFRIGERATOR PCB CONTROL
FREEZER PCB CONTROL
AUTOMATIC
HEATER DEFROST
PCM/ VCM
TEXTURED PCM
ABS
PU FOAM (Cyclopentane)
HEATER
R600a
TRANSPARENT SHELF
VEGETABLE CRISPER
CRISPER COVER
BOTTLE SUPPORTER
SOFT VEG CRISPER
DAIRY POCKETS
EGG TRAY
BOTTLE SHELF
CAN SHELF
ICE MAKER
ICE TRAY
FROZEN TRAY
RELAY START TYPE
FIN TYPE
SKIN TYPE
12V, 2W, 2500RPM
LG 330MD3 33 Ω ± 20%@25C
JIAXIPERA QP2-15L01/
QPS2-B15MD3 9~19Ω@25C
220-240V, 50 Hz
LG CMA089NAEM 14.4 ± 10% Ω (Sub)@25C
20.6 ± 5% Ω (Main)@25C
JIAXIPERA TX1113Y 19.8±10%Ω (Sub)@25C
16.8±10% (Main)@25C
12V, 100PPS
230V, 170W
73C, 250V
DEFROSTING SYSTEM
DOOR FINISH
OUT CASE
ITEMS
TEMPERATURE CONTROL
DEPTH
WIDTH
HEIGHT
COOLING SYSTEM
REFRIGERATOR COMPARTMENT
DOOR POCKETS
FREEZER COMPARTMENT
INNER CASE
INSULATION
DEFROSTING SERVICE
REFRIGERANT
COMPRESSOR
EVAPORATOR
CONDENSER
FAN MOTOR RATING
HEATER RATING
THERMAL FUSE RATING
RELAY RATING
COMPRESSOR STARTUP RANGE
COMPRESSOR MOTOR RATING
DAMPER RATING

330L Models:
SPECIFICATIONS
723
610
1760
FAN COOLING
REFRIGERATOR PCB CONTROL
FREEZER PCB CONTROL
AUTOMATIC
HEATER DEFROST
PCM/ VCM
TEXTURED PCM
ABS
PU FOAM (Cyclopentane)
HEATER
R600a
TRANSPARENT SHELF
VEGETABLE CRISPER
CRISPER COVER
BOTTLE SUPPORTER
SOFT VEG CRISPER
DAIRY POCKETS
EGG TRAY
BOTTLE SHELF
CAN SHELF
ICE MAKER
ICE TRAY
FROZEN TRAY
RELAY START TYPE
FIN TYPE
SKIN TYPE
12V, 2W, 2500RPM
RELAY RATING
JIAXIPERA TY-QZ-003
JX03 9~19Ω@25C
220-240V, 50 Hz
COMPRESSOR MOTOR RATING JIAXIPERA NB1116Y 19.6±10%Ω (Sub)@25C
15.7±10% (Main)@25C
12V, 100PPS
230V, 170W
73C, 250V
DEFROSTING SYSTEM
DOOR FINISH
OUT CASE
ITEMS
TEMPERATURE CONTROL
DEPTH
WIDTH
HEIGHT
COOLING SYSTEM
REFRIGERATOR COMPARTMENT
DOOR POCKETS
FREEZER COMPARTMENT
INNER CASE
INSULATION
DEFROSTING SERVICE
REFRIGERANT
COMPRESSOR
EVAPORATOR
CONDENSER
FAN MOTOR RATING
HEATER RATING
THERMAL FUSE RATING
COMPRESSOR STARTUP RANGE
DAMPER RATING
SPECIFICATIONS
3

4
EXPLODED VIEW AND PART DETAILS

EXPLODED VIEW AND PART DETAILS ( CABINET )
5
S.No. Part Code Object description Quantity Unit
1 1100118360 HOLDER,FAN MOTOR,ABS-FR,FF-Z330L 1 PC
2 1100118108 CAP,TOP HINGE COVER,ABS,VZ330L,SIL.GREY 1 PC
3 1100118145 HINGE,TOP,FF-Z330L 1 PC
4 1100118111 SWITCH,DOOR,2 POLE,FF-Z330L 2 PC
5 1100118107 COVER,HINGE,TOP,ABS,FF-VZ330L,SILKY GREY 1 PC
6 1300015474 EPS,INSULATION,DUCT,FC,FF-Z330L 1 PC
7 1100118155 F-LOUVER,FREEZER,HIPS-WHITE,FF-VZ330L 1 PC
8 1100118157 DECO,F-LOUVER,HIPS-WHITE,FF-Z330L 1 PC
9 1100118113 SHELF,FC, WITH RAIL,GPPS,PURPLE BL,VZ330 1 PC
10 1100118117 CASE,FREEZER,GPPS,PURPLE BLUE,FF-VZ330L 1 PC
11 1300015475 EPS,INSULATION,DUCT,RC,FF-Z330/280L 1 PC
12 1100118156 R-LOUVER,REF,HIPS-WHITE,FF-VZ330/280L 1 PC
13 1100118158 COVER,LED,R-LOUVER,GPPS,TRANS,FF-VZ330L 1 PC
14 1100118147 HINGE,BOTTOM,FF-Z330L 1 PC
15 1100118120 VEG CRISPER,GPPS,PURPLE BLUE,FF-VZ330L 1 PC
16 1100118123 SEPARATOR,VEG CRISPER,PP-WHITE,FF-VZ330L 1 PC
17 1100118121 COVER,VEG CRISPER,GPPS,PURPLE BL,VZ330L 1 PC
18 1100118119 SOFT,VEG CRISPER,GPPS,PURPLE BL,FF-VZ330 1 PC
19 1100118190 SHELF,OUTER FRAME,HIPS,TG,FF-Z330L 3 PC
20 1100118189 SHELF,GLASS,TOUGHENED,462X332X3.5,Z330L 3 PC
21 1100118143 DECO,BOTTOM,ABS,FF-Z330L,SILKY GREY 1 PC
22 1100118144 SOCKET,DECO,BOTTOM,HIPS-WHITE,FF-VZ330L 2 PC
23 1100074662 BOLT,ADJUSTER,40MM,ROHS,SILKY GREY 2 PC
24 1100118179 WIRE,BOTTLE SHELF,FF-Z330L 2 PC
25 1100118115 TRAY,ICE,CUBE,PP-WHITE,FF-Z330L 2 PC
26 1100118146 HINGE,CENTRE,FF-Z330L 1 PC
27 1100118114 BOX, ICE CUBE,GPPS,PURPLE BLUE,FF-VZ330L 1 PC
28 1100118116 KNOB,ICE,CUBE,HIPS-WHITE,FF-Z330L 2 PC
29 1100118151 HOLDER,LOCK,POM-WHITE,FF-Z330L 1 PC
30 1100122466 COMPRESSOR,WITH ACCESORI,LG-CMA089,R600a 1 PC
31 1100118182 DRYER 10GM(DOUBLE ENTRY-LOCK RING),Z330L 1 PC
32 1100118183 CLAMP,DRYER,FF-Z330L 1 PC
33 1100118167 PAN,WATER EVAPORATOR,PP-WHITE,FF-VZ330L 1 PC
34 1100118398 CONDENSER WITH HEAT SHRINK TUBE 1 PC
35 1100118106 ASSY,PCB,MAIN,FF-Z330L 1 PC
36 1100118152 COIL,EVAPORATER,FF-Z330L 1 PC
37 1100118169 COVER,ELECTRIC BOX,FF-Z330L 1 PC
38 1100118112 DECO,RETURN AIR,FC,ABS-SKY BLUE,FF-330L 1 PC
39 1100118110 COVER,LED FREEZER ,GPPS,TRANS,FF-VZ330L 1 PC
40 1100124019 EPS,RIGHT,EVAP,COIL,FF-VZ330L 1 PC
41 1100118153 HEATER,DEFROST,FF-Z330L 1 PC
42 1100118166 MOTOR,FAN,DC12 W,FF-Z330L 1 PC
43 1100118126 DECO,RETURN AIR,RC,HIPS-WHITE,FF-Z330L 1 PC
44 1100118180 DECO,CORNER COOLING,ABS-SKY BLUE,VZ330L 2 PC
45 1200074727 ASSY,CROSS RAIL,REAR,FF-Z330L 1 PC
46 1100118124 LED,NUTRI LIGHT,FF-Z330L 1 PC
47 1100118125 COVER,LED,NUTRI LIGHT,TRANS,FF-VZ330L 1 PC
48 1100118122 KNOB,HUMIDITY,PP-WHITE,FF-Z330L 1 PC
49 1100118412 LED,MAIN,REF,RC,FF-Z330L 1 PC
50 1100118181 CAP,DECO,CORNER COOLING,ABS-SKY BL,VZ330 4 PC
51 1100118150 HOLDER, ICE TRAY,HIPS-WHITE,FF-Z330L 1 PC
52 1100118361 COVER,FAN MOTOR,FF-Z330L 1 PC
53 1100118159 CAP,SCREW,F-LOUVER,ABS-WHITE,FF-Z330L 2 PC
54 1100118154 TROUGH,DRAIN,FF-Z330L 1 PC
55 1100124018 EPS,LEFT,EVAP,COIL,FF-VZ330L 1 PC
56 1100118168 BASE,SUPPORT,ELECTRIC BOX,ABS-FR,FF-Z330 1 PC
57 1100118109 LED,FREEZER,FC,FF-Z330L 1 PC
58 1100118118 COOLPACK,JAR,FF-Z330L 1 PC

EXPLODED VIEW AND PART DETAILS ( F-DDOR )
6
S.No. Part Code Object description Quantity Unit
1 1200077833 DOOR,FOAMED,FC,Z280,BROKEN H.L.PCB DSPLY 1 PC
2 1100113361 GASKET,DOOR,FC,FF-Z330/280/250L 1 PC
1100118127 LCD,DISPLAY BOARD,FF-Z330L 1 PC
1100118128 COVER,LCD,DISPLAY BOARD,ABS-FR,FF-Z330L 1 PC
4 1100118173 HANDLE,BASE,FC,ABS,FF-VZ330L,SILKY GREY 1 PC
5 1100118174 HANDLE,COVER,FC,ABS,FF-VZ330L,SILKY GREY 1 PC
6 1100118175 HANDLE,COVER STRIP,FC,ABS,VZ330L,CHROME 1 PC
7 1100118132 MEDIBOX,HIPS-WHITE,FC,FF-VZ330L 1 PC
8 1100118131 COVER,MEDIBOX,GPPS,FC,PURPLE BL,FF-VZ330 1 PC
9 1100118130 DAIRY BIN,GPPS,FC,PURPLE BLUE,FF-VZ330L 2 PC
10 1100118129 SUPPORT,UTILITY,GPPS,FC,PURPLE BL,VZ330L 1 PC
11 1100039985 LATCH,DOOR,FC,D202 1 PC
3

EXPLODED VIEW AND PART DETAILS ( R-DOOR )
7
S.No. Part Code Object description Quantity Unit
1 1200075125 DOOR,FOAMED,RC,FF-Z280L,BROKEN HAIRLINE 1 PC
2 1100113363 GASKET,DOOR,RC,FF-Z280L 1 PC
3 1100118176 HANDLE,BASE,RC,ABS,FF-VZ330L,,SILKY GREY 1 PC
4 1100118177 HANDLE,COVER,RC,ABS,FF-VZ330L,SILKY GREY 1 PC
5 1100118178 HANDLE,COVER STRIP,RC,ABS,VZ330L,CHROME 1 PC
6 1100118134 SUPPORT,UTILITY,GPPS,RCT,PURPLE BL,VZ330 1 PC
7 1100118136 DAIRY BIN,GPPS,RC,PURPLE BLUE,FF-VZ330L 2 PC
8 1100118138 COSMETIC BOX,HIPS-WHIET,RC,FF-VZ330L 1 PC
9 1100118137 COVER,COSMETIC BOX,GPPS,RC,PURPLE BL,VZ 1 PC
10 1100118139 COVER,DEODORIZER,RC,ABS-SKY BLUE,VZ330L 1 PC
11 1100118133 SUPPORT,BOTTLE,GPPS,RC,PURPLE BL,VZ330L 1 PC
12 1100118135 SUPPORT,UTILITY,GPPS,RCB,PURPLE BL,VZ330 1 PC
13 1100118224 STOPPER,DOOR,RC,METAL,FF-Z330L 1 PC

SAFETY PRECAUTIONS
• Unplug prior to servicing to prevent electric shock.
• Whenever testing with the power on, wear rubber gloves to prevent electric shock.
• If you use any kind of appliance, check regular current, voltage and capacity.
• Don’t touch metal products in the freezer with wet hands. This may cause
frostbite.
• Prevent water from following onto electric elements in the mechanical parts.
• When standing up after having checked the lower section of the refrigerator
with the upper door open, move with care to avoid hitting the upper door.
• When tilting the set, remove any materials on the set, especially the thin
plates (ex. Glass shelf or books).
• When servicing the evaporators, wear cotton gloves. This is to prevent
injuries from sharp evaporator fins.
• Leave the disassembly of the refrigerating cycle to a specialized service
center. The gas inside the circuit may pollute the environment.
• When you discharge the refrigerant, wear the protective safety glasses or
goggle for eye safety.
• When you repair the cycle system in refrigerator, the work area is well
ventilated. Especially if the refrigerant is R600a, there are nofire or heat
sources. (No Smoking).
DISASSEMBLY
FREEZER DOOR
• Open the hinge cover with a ‘-’ type driver.
• Loosen all 4 hexagonal bolts with a hexagonal screw driver.
• Take the upper hinge out.
• Lift the freezer door up and remove it.
REFRIGERATOR DOOR
• Remove the freezer door as per instructed in above section.
• Loosen the hexagonal bolts of middle hinge.
• Take the middle hinge out.
• Lift the refrigerator door out of bottom hinge and remove it.
F-LOUVER
• First, remove the screw cover from both the top corners of F-Louver.
• Then remove both the screws with help of a suitable ‘+’ type screw driver.
• Disconnect both the connectors (One white & One Blue) given in top left corner
behind F-louver.
• Evaporators can be serviced after opening the F-louvers only.
8

R-LOUVER & REF LED
First of all, remove the LED PCB Cover which is snap fitted in R-Louver itself with
“-” type driver after putting it comfortably in given slot on lower right side.
Remove the LED PCB mounted in snaps on R-louver.
Remove the screws from R-Louver with ‘+’ type driver.
Disconnect the PCB from connector in Main Wiring Harness.
Dislodge the R-Louver from snaps in the upper side.
Remove the connection between auxiliary harness and main harness.
DISASSEMBLY
SENSORS LOCATION
REF SENSOR FREEZER SENSOR DEFROST SENSOR
To change or disassemble the sensors, they should be properly removed from their
respective locations.
1. Refrigerator sensors are located behind R-Louvers as marked in the picture. Please
disassemble the R-Louver as mentioned earlier and then remove the sensor.
2. Freezer sensor is fixed between F-Louver Cover and F-Louver EPS as shown in
the above image. Please disassemble the F-Louver properly then remove the
F-Louver EPS gently without breaking it and then remove the sensor.
3. Defrost Sensor is located in evaporator assembly area as shown in the picture
above. Open the F-Louver assembly and disengage the holder for removing the
sensor.
9

DISASSEMBLY
FAN & FAN MOTOR
• Remove the freezer accessories.
• Remove two caps of screws and loosen screws of F-Louver.
• Disengage F-Louver cover and F-Louver EPS parts.
• Disconnect the connectors connecting Fan.
• Separate the fan assembly from EPS.
• Loose the screws holding Socket of fan motor.
• Disengage F-Louver part and Fan motor socket.
• Separate the motor socket and motor.
AUTO DEFROST ASSEMBLY
• Auto Defrost Assembly consists of D-Sensor and Temperature fuse.
• D-Sensor functions to terminate the defrost operation automatically and it is attached to
metal surface of Evaporator and senses temperature.
• Temperature fuse is a kind of safety device for preventing overheating of the heater when
defrosting.
• At the temperature of 72°C, it stops the emission of heat from the heater.
• Pull out the F-Louver EPS after removing the F-Louver cover.
• Separate the connector connected with the Auto Defrost Assembly and replace
new one.
Damper is located over the R-Louver assembly and is snap fitted in Return duct piece
which is fitted in cabinet through foam. For uninstalling the damper, first disconnect the
connectors which are mounted in back side behind the R-Louver assembly. Then,
push the snaps with help of “-” type driver and pull the damper assembly outward very
carefully so that snaps are not broken.
10

11
DISASSEMBLY
HEATER & HEATER CORD
In this refrigerator, Heater coil are used
for defrosting heater. During heating, the temperature
of heater very high Therefore, be careful not to burn
while servicing.
• After removing the F-Louver, separate the heater coil
by disconnecting the connectors.
• Exchanged Heater coil and connected the housing.
• If the Heater Cord is defected, disconnect the
connectors, and separate the Heater Cord with long
Nose.
• Replace and assembly the Heater Cord-L and
connect the connectors.
BOTTOM CAP
• Bottom cap is given in bottom of front side of refrigerator.
• It is mounted on two small re-enforcement pieces, as marked in the image, added just
below the front bottom panel.
• Carefully, put the snaps of bottom cap on the re-enforcement pieces and push it
towards the refrigerator in order to attach the bottom cap.

12
DISASSEMBLY
• Main PCB cover is located on back side of refrigerator in lower left corner.
• Open all the mounting screws with help of a suitable ‘+’ type screw driver to open the PCB cover.
• Take out the back plate carefully from the snaps given in back panel.
• Disconnect all the connectors.
• Remove the main power line and EMC filter
• Take the PCB out with the Back plate for required servicing.
DISASSEMBLY
MAIN PCB

13
DISASSEMBLY
BOTTLE SUPPORT
• Bottle racks are given in glass shelf for holding the bottles kept on these
shelves.
• They may create problems in putting containers above a certain height
in daily use.
• To adjust them, first of all take the shelf out in which these bottle racks
are mounted.
• Take out the bottle rack from the groove in which it is located.
• Place it in the groove given above the previous groove as shown in
picture.
DISASSEMBLY
COMPRESSOR ADJUSTMENT
COMPRESSOR
ROLE
The compressor intakes low temperature and low pressure gas evaporated from
Evaporator of the Refrigerator, and condenses this gas to high temperature and high
pressure gas, and then plays delivering role to Condenser.
COMPOSITION
The Compressor is Composed of Compressor Apparatus compressing gas,
Compressor Motor moving Compressor Apparatus and Case protecting Compressor
Apparatus and Motor. There is Relay Assy (one set of PTC-Starter and Over Load
Protector (OLP)) in Compressor. On the other hand, because the Compressor consists
of 1/1000mm processing precision components and is sealed after production in
absence of dust or humidity, deal and repair with care.
NOTE FOR USAGE
• Be careful not to allow over-voltage and over-current.
• No Strike. If applying forcible power or strike (dropping or careless dealing), poor
operation and noise may occur.
• Use proper electric components appropriate to the Compressor.
• Note to Keep Compressor. If Compressor gets wet in the rain and rust in the pin of
Hermetic Terminal, the result may be poor operation and poor contact may cause.
• Be careful that dust, humidity, and flux welding don't inflow in the Compressor inside in
replacing the Compressor. Dust, humidity, and flux due to welding which inflows to
Cylinder may cause lockage and noise.

14
MICOM FEATURE CONTROLS
1) FUNCTION
(1) After being powered on, the system will start initial self
buzzer will ring for 0.5s and all the contents will be displayed for 2s. If there is any fault found during the
initial self-check, the fault code will be disposed.
(2) After self-check the refrigerator enters in to running status and operating load. After being powered on
in each time, the display screen will in unlocked state.
2) FAST ICE MODE
(1) Press FAST ICE key to enter into this mode. It will show the pattern of FAST ICE. The setting
temperature of freezing chamber is -22℃ and that of refrigerating chamber is 10 The setting
temperature can not be adjusted
.
(2) In this mode, the compressor operates upon setting time. The running time is related to real time
temperature of freezing chamber in this stage.
(3) Press FAST ICE key to exit this mode manually. The system will automatically exit this mode when
the running time of the compressor arrives. During the exiting, FAST ICE pattern blinks, and the buzzer
rings. The blinking and buzzing will be stopped when you press FAST ICE key or the time reaches 5min.
After exiting this mode, the previous setting will be restored.
(4) In this mode, the VACATION and ENERGY SAVING keys are invalid. If the electricity is turned off in
midway, the system will enter into fast ice mode again after the electricity is turned on (Power down
memory function).
3) DEEP FREEZER MODE
(1) Press and hold FAST ICE key for over 5s to enter into this mode. It will show the pattern of FAST
ICE. The setting temperature of freezing chamber is -30℃, and that of refrigerating chamber is 8℃. The
setting temperature cannot be adjusted.
(2) In this mode, the compressor and power-driven air door operate upon setting temperature.
(3) In this mode, the compressor will run continuously until reach the halting temperature(cancel the
program of automatic defrosting and the 5 min downtime when the continuous running time is 3 hours)
(4) Press FAST ICE key to exit this mode manually. After exiting this mode, the previous setting will be
restored.
(5) In this mode, the VACATION and ENERGY SAVING keys are invalid. If the electricity is turned off in
midway, the system will enter into fast ice + mode again after the electricity is turned on (Power down
memory function).
4) SUPER CHILL MODE
(1) Press SUPER CHILL key to enter into this mode. It will show the pattern of SUPER CHILL. The
setting temperature of freezing chamber is -17deg, and that of refrigerating chamber is 1deg. The setting
temperature cannot be adjusted.
(2) In this mode, the compressor operates upon setting time. The running time is related to real time
temperature of freezing chamber in this stage. When the compressor runs, the power-driven air door
keeps open.
(3) Press SUPER CHILL key to exit this mode manually. The system will automatically exit this mode
when the running time of the compressor arrives. After exiting this mode, the previous setting will be
restored.
-check each time. In normal condition, the
℃

15
MICOM FEATURE CONTROLS
5) VACATION MODE
(1) Press VACATION key to enter into this mode. It will show the pattern of VACATION. The setting
temperature of freezing chamber is -11deg, and the temperature of refrigerating chamber will not be
displayed (The refrigerating chamber will not be used). The setting temperature cannot be adjusted.
(
(2) Press VACATION key to exit this mode manually. After exiting this mode, the previous setting will
be restored.
(3) The system will automatically exit this mode and restore previous setting if the door of freezing
chamber or refrigerating chamber opens.
(4) In this mode, the ENERGY SAVING key is invalid. If the electricity is turned off in midway, the
system will enter into vocation mode again after the electricity is turned on (Power down memory
function).
6) ENERGY SAVING MODE
(1) Press ENERGY SAVING key to enter into this mode. It will show the pattern of ENERGY SAVING.
The setting temperature of freezing chamber is -12℃, and that of refrigerating chamber is 8℃. The
setting temperature cannot be adjusted.
(2) In this mode, the compressor and power-driven air door operate upon setting temperature.
(4) Press ENERGY SAVING key to exit this mode manually. After exiting this mode, the previous
setting will be restored.
(5) The system will automatically exit this mode and restore previous setting if the door of freezing
chamber or refrigerating chamber satisfies “open time ≥2” within 60min.
(6) In this mode, the VACATION key is invalid. If the electricity is turned off in midway, the system will
enter into energy saving mode again after the electricity is turned on (Power down memory function).
7) SCREEN LOCKING KEY
(1) The system will automatically confirm and lock the screen 30s after the completion of key
operation. Simultaneously press and hold and for 3s to manually lock the screen. In screen locked
state, except the unlocking combination keys, other keys are all invalid when being pressed, and the
lock pattern will blink for three times when you press invalid keys.
(2) Simultaneously press and hold and for 3s to manually unlock the screen. All the keys are
available after being unlocked.
(3) When simultaneously pressing and holding and , the other key signals should be ignored if
detected.
8) COMBINATION KEYS
.
(1) Within 30min after powering on, simultaneously press and hold “FAST ICE” and “VACATION” keys
for over 5s to enter into hardware self-check program.
(2) Press and hold UP key and do not leave your finger from this key, then press and hold “TIME”key
for over 5s to enter into temperature sensor parameter query program.
(4) Press DOWN and hold “MODE”key for over 5s to restore factory settings. The timer and counter-
reset will be reset. All the adjustable parameters will be restored.
After that need to power off and re-insert the Display jumper for proper time setting
(5) Press “DOWN KEY” and hold “TIME”key for over 5s to enter into manual defrosting program;
Then press and hold key and do not leave your finger from this key ,
To quit Manual defrost with same way Press “DOWN” and hold “TIME”key for over 5s again.

16
MICOM FEATURE CONTROLS
9) BUZZER CONTROL
(1) When effective key is pressed, the back light will be light, and the buzzer will ring once
(the voice will last for 0.2s, f=4.0kHz).
(2) If invalid key is pressed, there will be no buzzer ringing.
10) LIGHT CONTROL
(1) The refrigerator light will be on when the door of the refrigerating chamber opens. The
light will be forcefully closed if the door does not close within 10min. The light will be closed
when the door of the refrigerating chamber closes.
(2) The freezer light will be on when the door of the freezing chamber opens. The light will
be forcefully closed if the door does not close within 10min. The light will be closed when
the door of the freezing chamber closes.
(3) The photo-synthetic fresh keeping light will be on when the door of the refrigerating
chamber opens. The light will be closed when the door closes. The timing will be reset to
count from start.
11) DOOR OPENING ALARM
(1) According to the switching signals from door of refrigerating/freezing chamber, if the
door is open for over 1 min, the buzzer will ring to remind users to close the door. For every
15s, the buzzer gives three alarm sounds with the time interval of ringing for 0.5s and
suspending for 0.5s.
(2) The lamp of the refrigerating chamber will be automatically closed when the door of the
refrigerating chamber is open for over 10min. The lamp of the freezing chamber will be
automatically closed when the door of the freezing chamber is open for over 10min. The
compressor stops running. The buzzer rings continuously until door closing signal is
detected.
12) HARDWARE SELF-CHECK
(1) The buzzer rings twice, and all the lights of the LED panel are opened;
(2) All the lights of LED panel are closed after 2S.
(3) The circulating fan works for 5s after being opened every time.
(4) The lamp of the freezing chamber keeps light for 5s after being opened every time.
(5) The power-driven air door restore once.
(6) The lamp of the refrigerating chamber is opened, and closed after lasting for 5S.
(7) The photo-synthetic fresh keeping lamp is opened, and closed after lasting for 5S.
(8) The evaporator heater strip opens (230V) and lasts for 5S.
(9) The compressor (230V) works for 5S.
(10) Test the communication interface. The refrigerating temperature is “P0” in normal
condition, and the refrigerating temperature is “P9” when there is fault.
(11) Test the sensor interface of the refrigerating chamber. The refrigerating temperature is
“P0” in normal condition, and the refrigerating temperature is “E1” when there is fault. No
words will be displayed.
(12) Test the sensor interface of the freezing chamber. The refrigerating temperature is
“P0” in normal condition, and the refrigerating temperature is “E2” when there is fault.
(13) Test the interface of defrosting sensor. The refrigerating temperature is “P0” in normal
condition, and the refrigerating temperature is “E3” when there is fault.
(14) “P0” will be showed in “Time-minute” when the door of the refrigerating chamber
closes, and “P1” when it opens. No alarm will be given when the door opens at this
moment.
(15) “P0” will be showed in “Time-minute” when the door of the freezing chamber closes,
and “P1” when it opens. No alarm will be given when the door opens at this moment.
(16) Press “MODE” key, the freezing temperature is “11” and the buzzer will ring in normal
condition. No display will be given when there is fault.
(17) Press key, the freezing temperature is “22” and the buzzer will ring in normal
condition. No display will be given when there is fault.

17
MICOM FEATURE CONTROLES
(19) Press “TIME” key, the freezing temperature is “44” and the buzzer will ring in normal
condition. No display will be given when there is fault.
(20) Press FAST ICE key, the freezing temperature is “55” and the buzzer will ring in normal
condition. No display will be given when there is fault.
(21) Press VACATION key, the freezing temperature is “66” and the buzzer will ring in
normal condition. No display will be given when there is fault.
(22) Press ENERGY SAVING key, the freezing temperature is “77” and the buzzer will ring in
normal condition. No display will be given when there is fault.
(23) Press SUPER CHILL key, the freezing temperature is “88” and the buzzer will ring in
normal condition. No display will be given when there is fault.
13) FAULT ITEMS
NOTE: After being powered on, there will be “E7” fault, which is normal phenomenon and
restart will be able to eliminate this fault.
14) DISSEMBLING THE PCB
(1) Place a point sharp pin in the right of Energy Saving key as shown in the picture.
(2) Gently insert it behind the PCB cover.
(3) Pull the PCB cover with the help of inserted pin outward to open the Front PCB cover.
S.N Fault Type Display Information General
information
1 Fault of Ref-Sensor Error Code “E1” Alarm
2 Fault of Freezer-Sensor Error Code “E2” Alarm
3 Fault of Defrost -Sensor Error Code “E3” Alarm
4 Communication Fault Error Code “E9” Alarm
5 Software (Read/Write)
Problem
Error Code “E7” Alarm
S.N Fault Type Display Information General
information
1 Fault of Ref-Sensor Error Code “E1” Alarm
2 Fault of Freezer-Sensor Error Code “E2” Alarm
3 Fault of Defrost -Sensor Error Code “E3” Alarm
4 Communication Fault Error Code “E9” Alarm
5 Software (Read/Write)
Problem
Error Code “E7” Alarm