Mitsubishi Electric MR-LXR68EM-GSL-R User manual

Changes for the Better
1. SPECIFICATIONS.......................................................................................................................
1
2. OUTLINES AND DIMENSIONS..................................................................................................
3
3. WIRING DIAGRAM……………..............................................................................................
4
4. REFRIGERANT CIRCUIT……………...............................................................................................
6
5. NAME OF PARTS......................................................................................................
7
6. TROUBLE SHOOTING………………………………………………………………………….
9
6.1 FUNCTION OF OPERATION PANEL…………………………………………………………………….
9
6.2 FLOW CHART OF SELF-CHECK………………………………………………………
22
6.3 BLOCK DIAGRAM OF PRINTED CIRCUIT BOARD……………………………………
25
6.4 AUTO ICE-MAKER………………………………………………………………………………
25
6.5 FLOW CHART OF TROUBLE CRITERION……………………………………..
28
6.6 TROUBLE CRITERION OF MAIN PARTS……………………………………
35
6.7 TEST POINT DIAGRAM OF MAIN CONTROL BOARD………………….
40
7. DISASSEMBLY INSTRUCTIONS…………………………………………………….
41
8. PART LISTS…………………………………………………………………………………
46
Models
CONTENTS
MR-LXR68EM-GSL-R
MR-LXR68EM-GBK-R
2018
SERVICE MANUAL
NO. SM-RE-1822
HOME REFRIGERATORS
R……….Russia

1-1 SPECIFICATIONS
MR-LXR68EM-R
Dimensions (HXWXD)
1
SPECIFICATIONS
Power supply 220 V 50Hz
Cabinet Acrylic resin coate steel
Foo liner ABS resin
Total capacity (AS Gross) L 630 (R : 333 V : 117 F : 180)
mm. 1798 x 900 x 735
Insulation
Cabinet Foame cyclopenthane
Refrigerator oor Foame cyclopenthane
Vegetable oor Foame cyclopenthane
Freezer oor Foame cyclopenthane
Cooling system Freezer Force air convection
Refrigerator 3 way air flow
Evaporator Fin an tube type
2 pcs.
Con enser Conceale type
Defrost system Automatic (Defrost heater )
Drain Automatic ( rainage)
Sli e chille case up 1 pc.
Sli e chille case low 1 pc.
Temperature control system Automatic control
Refrigerator room light LED Light Boar
Accessories
Glass shelf ( R )
Water tank 1 pc.
Free pocket ( S ) 2 pcs.
Free pocket ( L ) 2 pcs.
Egg case
1 pc.
Bottle pocket 2 pcs.
Capsule oor pocket 1 pc.
1 pc.
Vegetable case 1 pc.
Fruit case 1 pc.
Freezing case (UP) 1 pc.
Weight Unit kg 110
Shipping
Freezing case (LOW) 1 pc.
Ice box sheet 1 pc.
Ice spoon
kg 123
Ice box 1 pc.
Kick plate 1 pc.
1

1-2 ELECTRICAL PARTS SPECIFICATION
MR-LXR68EM-R
Model
MM3-71CCY
Motor protector
Ambient temperature
25
Time
16 MAX
Current
17
Capillary tube
∅
1
.
6
X
∅
0
.
65
X
2350
ehydrant Molecular sieve
9
Refrigerant R600a
efrosting timer
Control board
Thermistor
14
+
1
.
5
73
efrost heater
339
Ω
(
240
V
170
W
)
Not equipped
Model
12537
JE
-
13
P
-
BU
-
F
2
Type
C brushless motor
Rate Voltage
Input Power
4.2 (12 V C)
Revolution
2300 (12 V C)
Model
4715JL04WS16G51
Type
C brushless
Input Power
1.44 (12 V C)
Revolution
1450 (12 V C)
Vegetable case heater
6
Chilled case heater
6
Water pipe heater
0.9
Freezer
Refrigerator
Chilled case
ial position
ON
OFF
ON
OFF
ON
OFF
LESS COL
o
C
-12.9
-16.8
5.4
4.8
-
-
o
C
-17.1
-20.8
2.3
1.6
-
-
COL ER
o
C
o
C
Compressor
Model
EEI91E13 WH
Power supply
220 V, 50Hz
Rated input
W
37 (1620 rpm)
Starting current
A
6 (current limiter)
Rated current
A
0.86 (1620 rpm)
Winding resistance (A.T. 20
o
C) 16.72 Ω
94
efrosting
control
efrost finish
Thermal fuse
eodorizing function of defrost heater
o
C
Sec.
A
Fan motor
Freezer
12 V C
Machine
Chamber
Heater
Thermistor R Thermistor C
Temperature control
Thermistor F
-20
-
-
-
-
-0.4
-1.6
-23.8
-
-
COL
-0.2
-0.9
mm.
g
g
o
C
o
C
W
r.p.m
W
r.p.m
W
W
W
2

MR-LXR68EM-R
2
OUTLINES AND DIMENSIONS
Unit : mm
Required Space For Installation
3

(SKELETON WIRING DIAGRAM)
MR-LXR68EM-R
3
WIRING DIAGRAM
PLUG
4

MR-LXR68EM-R
(ACTUAL WIRING DIAGRAM)
5

MR-LXR68EM-R
4
REFRIGERANT CIRCUIT
6

MR-LXR68EM-R
5
NAMES OF PARTS
7

8

6.1) FUNCTION OF OPERATION PANEL
(1) Function of normal operation
* To initialize the settings, touch for 10 seconds. The settings will become as follows.
- " S-COO CHI , RAPID COO and ENERGY SAVING " will become canceled.
- " Referigerator compartment and freezer compartment " will become set to " Middle ".
6 TROUBLESHOOTING
Touching will cause the operable icons to light up.
To save power, all displays other than are usually turned off (it turns
off if there is no operation for about 30 seconds).
The operation panel employs the touch screen which is operated by touching the screen with your finger.
- Icons and other displayed items except are not normally lit for saving energy.
To check the setttings, touch to light up those icons and items.
- The operation may not work properly in the follwing cases.
* The operation panel or your finger is wet or dirty.
* The operation panel is touched with a gloved finger or a finger with a bandage.
* The operation panel is touched with a sharp-pointed instrument.
- If the operation panel does not respond to touch on the screen, release your finger from the screen and touch it again.
Touching the screen again without pause may result in false detection. Touching on the screen strongly does not
enhance the detection sensitivity.
- The response of operation panel depends on the ambient temperature and humidity, physical condition of the user, and
operating conditions of the electric appliances around the refrigerator.
Home Icon
Touch an icon to display its setting details. When turning ON or OFF settings, touch one of these.
Child safety lock
9

(2) Demonstration mode for shop display
1. Setting
- Within 1 minute after power supply turns on, touch the , and simultaneously
for 5 seconds with the door of the refrigerator compartment opened.
* When the setting is complete, 2 short beeps sound is heard and is displayed.
* Demonstration mode is not a ailable when the temperature of freezer compartment is –7°C or lower.
2. Panel operation mode during demonstration mode
During the demonstration mode, is continuously lit.
Manual mode: By touching the icons, display on the operation panel changes as it is normally operated.
Auto mode: Panel display automatically changes.
** When any icon is touched, the panel operation switches to the manual demo mode.
When no icon is touched for 10 seconds after the operation panel turns off, it switches to the auto demo mode.
3. Release / Remo e
1.Open the freezer compartment’s door during demonstration mode, and lea e it open.
Note : Follow the procedure abo e to release demonstration mode as it cannot be released by simply turning
on/off the power supply.
(3) Ice making test/Self-check
1. Setting
(4) Temperature ad ustment for slide chilled case (low) [ When supercool chiling is set ]
1.Outline
The slide chilled case (low) in refrigerator compartment can be set to when it is set to supercool chilling.
Otherwise, if the slide chilled case compartment was not cold, please set to .
3) Touch in order to change the temperature setting of )
10

(5) Fine adjustment of temperature
(6) Service Diagnostics Function
1) Out Line
- The chart in next page shows the outline of service check function.
- “Service diagnostics function entry” needs to be set in order to perform each check mode.
- After the service check function entry ” Touch to select the serial number for the check mode to be performed.
Press for 3 seconds to start the selected check mode.
- blinks while service check function is performed.
- When one of the check modes is in operation the other check modes cannot be set. The check mode in operation needs to
be cancelled before setting another check mode.
11

Note :
*
After one of the check modes starts, the mode continues operating even if the door gets closed.
(Open the door when releasing the check mode.)
* Refer to the following sections a out the operation procedure and the display of each check mode.
- In order to release “service diagnostics function entry,” follow the same procedure as that for setting operation during
“service diagnostics function entry” or each check mode.
Touch to light up the icons.
Each touch of changes the linking indicator(s) etween
Each com ination of indicates the serial num er for each check mode.
* The service diagnostics function entry starts from the serial num er 1, linking of
…The rotational speed of the compressor can e changed.
The ox fan(At machine room) can e switched on and off.
…Each damper can e opened and closed. Freezer fan motor
can e switched on and off.
…The detected temperature of each thermistor can e checked.
The serial num ers "4" can e selected,
ut do not set the mode to any of them.
…The set temperature and the energization rate in each
compartment can e adjusted.
The serial num ers from 6 to 8 can e selected, ut do not set
the mode to any of them. Those modes are for factory use only.
The indicators of the serial num er ( ) for the selected check mode stop linking and remain lit.
1. Enter the service check
function. (Service diagnostics
function entry)
Setting/releasing method Display
Door
Operation
Blinking
Open the freezer
compartment door.
Touch and
simutaneously for 3 seconds.
2. Select the check mode.
Selecting method Display
Door
Operation Any of the following : linking
Blinking
Open the freezer
compartment door.
Touch .
Blinking
Open the freezer
compartment door.
No. Mode
1
2
3
4
Touch for
3 seconds.
5
6 - 8
3. Set the check mode.
Selecting method Display
Door
Operation Any of the following : lit
Compressor rotational speed change mode
Damper operation mode
Thermistor temperature check mode
Set temperature adjustment mode
1 2 3 4
5678
12

2) Compressor rotational speed change mode
1. Setting
•
With the freezer compartment door open
,
touch and simultaneously for
3
seconds
until 2 short beeps sound. will blinks.
•
With the freezer compartment door open, touch to select blinking
• With the freezer compartment door open, touch for 3 seconds until 2 short beeps sound.
The compressor rotational speed change mode has started. The mode continues operating even if the door is closed.
Note The compressor rotational speed change mode is not available during the demonstration mode,
the thermistor temperature check mode, the temperature adjustment mode, or when the child lock is enabled.
2. Display during the compressor rotational speed change mode
During compressor rotational speed change mode, blinks and is lit.
3. Display of rotational speed
- The ones place and tens place of the compressor rotational speed are displayed separately.
- One of the numbers (8, 4, 2, and 1) is assigned to each indicator of both tens place and ones place on the display.
The sum of the numbers corresponding to the lit indicators is the compressor rotational speed.
e.g.) Compressor rotational speed 53 rps, Box Fan(At machine room) ON
Tens place of the compressor
rotational speed
Ones place of the compressor
rotational speed
Display Corresponding numbers Display Corresponding numbers
8 8
4 4
2 2
1 1
Blinking
Box Fan (At
machine room)
ON/OFF
Maximum rotational
speed of compressor,
Level 9 or Level 10.
is lit
Ones place of the
compressor
rotational speed
Tens place
of the
compressor
rotational
speed
Tens place
"5"(=4+1)
Box Fan (At machine room) ON
Blinking
Ones place
"3"(=2+1)
is lit
13

4 Changing the rotational speed
After setting this mode, the rotational speed of the compressor changes every time when is touched.
The ones place and tens place of the rotational speed(rps) are displayed separately.
(Basically the compressor starts operation at level 10, however, it may be different depending on models, or as a result of specification change.)
Change of rotational speed>
*
Rotational speed can be changed only when the compressor is in operation. While the compressor stops, rotational speed is
not displayed and the touching operation of is disabled. When the compressor stops, unplug the power cord, and wait for
several minutes, then plug it again.
* Operation sound may increase in the process of changing rotational speed, but that is not mulfunction. Check the sound
level when rotational speed is stabilized.
5 Switching ON/OFF the box fan motor(At machine room)
During this mode, touching in order to turns on/off the box fan motor(At machine room).
The ON/OFF state is represented by
Switching the maximum rotational speed of the compressor between Level 9 and Level 10
During this mode, the maximum rotational speed of the compressor can be switched between Level 9 and Level 10 by
touching for 3 seconds.
( The maximum rotational speed of the compressor is represented by )
•
While the maximum rotational speed of the compressor is set to Level
9
,
the rotational speed cannot be changed to Level
10
by following the method described in “ 4 Changing the rotational speed”.
•
When high load is applied to the refrigerator such as in summer, setting the maximum rotational speed to Level 9 may not
obtain adequate cooling.
• The maximum rotational speed of the compressor that was set to Level 9 will remain the same even after this mode is released.
The maximum rotational speed of the compressor will be memorized in the control board. So, if the control board is
replaced, the set maximum rotational speed will be reset to Level 10.
7 Release
•
With the freezer compartment door open
,
press and simultaneously for
3
seconds
until 2 short beeps sound. The operation panel returns to the normal temperature display.
•
The function is automatically released in
1
hour
.
•
Although unplugging and plugging the power cord can release this function, it is recommended to follow the procedure
above for protection of the compressor.
*
The set maximum rotational speed of the compressor will remain the same even after the power is turned off.
Box fan
ON
Lit
Level 9
Lit
Level 10
Not lit
OFF
Not lit
Maximum rotational speed of compressor Display of
Normal
Level 9
Level 8Level 7Level 6Level 5
Level 4Level 3
Level 2
Level 1
Normal
Level 10Level 9
Level 8Level 7Level 6Level 5
Level 4Level 3
Level 2
Level 1
Level 0
Low speed High speed
14

3) Damper Operation Mode
1 Setting
• With the freezer compartment door open, touch and simultaneously for 3 seconds
until 2 short beeps sound. will blinks.
• With the freezer compartment door open, touch to select blinking
• With the freezer compartment door open, touch for 3 seconds until 2 short beeps sound.
The damper operation mode has started. This mode continues operating even if the door gets closed.
ote : The damper operation mode is not available during the demonstration mode, the compressor rotational speed change mode,
the thermistor temperature check mode, the temperature adjustment mode, or when the child lock is enabled.
2 Display during the damper operation mode
During damper operation mode, blinks and is lit
3 Control state display of each damper
a) Damper serial number
b) State of damper
- represents the current state and represents the next state of damper operation.
- Both buttons indicate that the damper is open when they are lit, and they indicate that the damper is closed when they are not lit.
Chilled O
Serial umber Assigned compartment Damper operation mode
Display Corresponding values 4 Defrosting -
1 Refrigerator compartment O
4 6 Outside air -
3 Freezer compartment X
2
O / X / - : SW operation is effective / ineffective / Cannot select
1 Chilled : For slide chilled case (low)
8 5 Ice tray -
Present
ext
2
Blinking
c) Freezer fan motor
ON/OFF
a) Damper serial number
b)State of
damper
is lit
: present state
: next state
d) Display during the damper
operation “Blinking
- Each serial number is assigned to each compartment
(thermistor), which is used in thermistor temperature
mode and set temperature adjustment mode besides
damper operation mode.
- The values (8, 4, 2, and 1) are assigned to each
indicator. The sum of the values corresponding to the lit
indicators is the damper serial number.
15

4 Opening and closing dampers
(2) To open the damper, light up by touching . To close the damper, turn off by touching again.
**Damper operation indicators
- on the left represents the current state and on the right represents the next state of the damper operation.
- Both buttons indicate that the damper is open hen they are lit, and they indicate that the damper is closed hen they are not lit.
- When the selected damper is in operation, the indicator for the present state brinks.
- When any damper including those hich are not selected is in operation, blinks.
<Present and next states of the damper of the selected compartment>
Blinking
<The damper of any compartments is in operation>
e.g.) To open the damper of the refrigerator compartment, hich is currently closed, select the items sho n belo and touch for 3 seconds
5 Switching ON/OFF the freezer fan motor
During this mode, touching in order to turns on/off the freezer fan motor.
The ON/OFF state of the freezer fan motor is represented by .
6 Release
•
With the freezer compartment door open
,
touch and simultaneously for
3
seconds
until 2 short beeps sound. The operation panel returns to the normal temperature display.
•
The function is automatically released in
1
hour
.
•
Although unplugging and plugging the po er cord can release this function, it is recommended to follo the procedure
above for protection of the compressor.
Not Lit
Freezer fan motor
ON
OFF
display
Lit
Blinking
c) Freezer fan motor Lit :
ON
a) Damper serial number "1" :
refrigerator compartment
b)State of
damper
present : (Not lit)
next : (Lit)
is lit
3 : freezer)
16

4) Thermistor temperature check mode
1 Setting
•
With the freezer compartment door open, touch and simultaneously for 3 seconds until 2 short beeps sound.
will blinks.
•
With the freezer compartment door open, touch to select the blinking
•
With the freezer compartment door open
,
touch for
3
seconds until
2
short beeps sound
.
The thermistor temperature check mode has started. This mode continues even if the door gets closed.
*
The thermistor temperature check mode is not available during the demonstration mode, the compressor rotational speed
change mode, damper operation mode, the set temperature ad ustment mode, or when the child lock is enabled.
2. Display during the thermistor temperature check mode
During the thermistor temperature check mode, blinks and are lit.
3. Displaying the thermistor temperature
The kind and temperature of thermistor are displayed on the operation panel.
*The outside air temperature detected by thermistor may be a little different from the actual one due to the influence of the
temperature in the refrigerator.
a) Thermistor serial number
b) Tens place of the thermistor temperature
- Display of corresponds to the values 8, 4, 2 and 1 respectively.
The sum of the values corresponding to the lit indicators is the tens place of thermistor temperature.
8
4
2
Serial Number
1
2
3
4
2
1
Assigned compartment
Display
Corresponding values
8
1
Display
Corresponding values
Outside air
4
5
Refrigerator compartment
Chilled(Slide chilled case (low))
Freezer compartment
Defrosting
Ice tray
6
is lit
Blinking d) Plus and minus sign(±) of the thermistor temperature
a) Thermistor serial number
b) Tens
place of the
thermistor
temperature
c) Ones place of the thermistor temperature
- Each serial number is assigned to each compartment (thermistor), which is used in thermistor temperature mode and set
temperature ad ustment mode besides thermistor operation mode.
- The values (8, 4, 2, and 1) are assigned to each indicator. The sum of the values corresponding to the lit indicators is the
thermistor serial number.
17

c) Ones place of the thermistor temperature
- Display of corresponds to the values 8, 4, 2 and 1 respectively.
The sum of the values corresponding to the lit indicators is the ones place of thermistor temperature.
d) lus and minus sign(±) of the thermistor temperature
- lus and minus sign(±) of the thermistor temperature are represented by
e.g.) The freezer compartment thermistor reads –25ºC.
4. Changing the thermistor on display
- While thermistor temperature is displayed, touch . Each touch of changes the thermistor type along with a short beep.
Each thermistor is displayed using the serial numbers described in a) in numeric order repeatedly
(1: refrigerator compartment ~ 6 : Outside air).
5. Release
•
With the freezer compartment door open
,
touch and simultaneously for
3
seconds
until 2 short beeps sound. The operation panel returns to the normal temperature display.
•
The function is automatically released in
1
hour
.
•
Although unplugging and plugging the power cord can release this function, it is recommended to follow the procedure
above for protection of the compressor.
-
+
Lit
Not lit
Display
Corresponding values
8
Thermistor temperature signs
Display
4
2
1
Blinking d) sign " - "
is lit
a) Thermistor serial number "3"(=2+1) :
b) Tens
place :
"2"
c) Ones place : "5"(=4+1)
18