Midea V4 Plus S Series User manual

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2.6 V4 Plus R Series: KJR-120B
KJR-120B
Wired controller specifications
Model KJR-120B/BKP-E
Power Supply Voltage
DC
5.0
V
Ambient Temperature Range -5°C～+43°C
Ambient Humidity Range RH40%~RH90%
Performance features
1. Operating mode: cool, heat, dry, fan and auto.
2. Set the mode through buttons.
3. Indoor setting temperature range: 17°C ~30°C.
4. LCD (Liquid Crystal Display).
5. Auto mode for V4 plus R series.
2.6.1 Functions summary
The controller has functions as follows:
1) Can compatible with the V4 plus heat recycling 3-pipe system and V4 plus 2-pipe system.
2) Clock and Timer function;
3) Auto-restart function;
4) Query function;
5) Indoor unit error display function
6) Auto mode and air filter cleaning reminding function
7) Can switch Fahrenheit degree and Centigrade degree.

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2.6.2 Appearance
(2) ON/OFF button
Press the On/Off button to control the indoor unit on and off state.
When the unit is turned off, press this button, the unit will be turned on and the operation icon lights on.
When the unit is turned on, press this button, the unit will be turned off and the operation icon lights off.
(2) Mode button
 Press the button to select the operation mode, each press will change as following order:
AUTO→COOL→DRY→ HEAT→FAN→AUTO
 Cool-only mode will change as following order:
COOL→DRY→FAN→COOL
Notes: Heat-only mode can only set to HEAT mode.
 When mode setting is in progress, the screen light the mode "set" string and display the setting mode of
the wired controller. After the mode setting is completed, "set" strings extinguish and the screen display
the actual operation mode of the indoor unit.
 The indoor unit has 3 different actual operation modes: COOL/HEAT/FAN. The actual operation mode of
the indoor unit may be different from the setting mode of the controller. For example: If the setting mode is
AUTO, the actual operation mode of the indoor unit may be COOL or HEAT. If the setting mode is DRY, the
actual operation mode of the indoor unit is COOLING.
MODE Button
Left Button
FAN SPEE D
Button
Transmitting Icon
Temp. Setting Button Timer/Clock Setting Button
Operating Ico n
Setting
Temperature
Operating Mode
ON/OFF
Button
Silent/OK
Button
Right Button
Operating Fan
Speed
Timer/Clock
Display Area
Function Icon
Swing Icon
Locking Icon

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(3) Clock setting
First power on or reset the wired controller, the clock will display 12:00. Long pressing the Timer/CLOCK
button for 2 seconds can enter to the clock setting state. At this time, the minute position will be flashed; press
or button can adjust the minute.
After finishing the hour setting, press left button or right button to switch to minute position
setting, then the minute position will flash, press and to adjust the minute value.
After finish the clock setting, press the button or wait for 5 seconds to confirm and exit the setting
state.
(4)Timer setting
Press the timer/clock setting button to enter the timer on setting state, and the screen will display and
.
Press and buttons can adjust the timer. When the timer setting is less than 10 hours, each press
or button will increase or decrease 0.5 hour. When the timer setting is more than 10 hours, each press
or will increase or decrease 1 hour, the maximum timer setting is 24 hours.
After adjusting the timer on setting, press the button or wait for 5 seconds to confirm and exit the timer
on setting.
Under the timer on setting state, press the timer/clock setting button, then enter into the timer off setting state,
and the screen will display and .
The setting method of timer off is the same as the timer on.
Under timer setting state, set the timer on and timer off to be 0.0h can cancel timer on and timer off.
Notes:
If the controller has been set timer on/ off, press the ON/OFF to turn on/ off the unit and the timer will be
canceled simultaneously.
(6) Fan speed
Under COOL, HEAT and FAN modes, press the fan speed button can adjust the fan speed setting.
Under AUTO and DRY modes the fan speed is not adjustable and the fan speed defaults auto speed.
1) Press the FAN SPEED button to set the fan speed of indoor unit. The fan speed switch order as follow:
2) Under AUTO and DRY modes the fan speed is not adjustable and the fan speed defaults auto speed.
(6)Temperature setting
Press the temperature adjusting buttons or to increase or decrease the setting temperature. Under
AUTO/COOL/DRY/HEAT operating mode can set the temperature, the setting range: 17℃-30℃(62℉-88℉).

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The setting temperature cannot be adjusted under the FAN mode.
(7) Swing function
Press the swing button to activate the swing function when the fan of indoor unit is turned on, and the
swing icon will be lighted up. Press this button again can turn off the swing function, and the swing icon
lights off. This function is effective when it is used with the relative indoor unit.
(8) Silent mode
Under the COOL, HEAT, FAN modes, press the silent button can enter the silent operation. It is used
to reduce the running noise through setting the fan speed to low.
Under the AUTO, DRY mode, the fan speed is auto and the silent button doesn’t work.
(9) Locking wired controller
Press the temperature adjusting buttons and simultaneously, the wired controller enters locking
state, and the locking icon will be lighted up.
Under the locking state, the wired controller will not respond from the buttons pressing and the command of
the remote controller.
Press the temperature adjusting buttons and simultaneously again can cancel the locking state.
(10) Query function
Long press the FAN SPEED button and Silent /OK button will display the temperature from temperature sensor.
Use and buttons can switch display of room temperature (Tf), middle evaporator temperature t2
and evaporator-outlet temperatureT2b. Press button or wait 5s will exit the query function and back to
normal display.
(11) Air filter cleaning reminding function
The wired controller records the total running time of the indoor unit, when the accumulated running time
reaches the pre-set value, the air filter cleaning reminding icon will be lighted up to remind users need to
clean the air filter of the indoor unit.
Long press button for 2 seconds, and reset the reminding icon and the wired controller will
re-accumulate the total running time of the indoor unit.
The default setting value of the reminding function is 2500 hours, and it can change to be 1250 hours, 5000
hours or 10000 hours.
(13) Auto operation mode (3-pipe system)
1) 3-pipe system auto operation mode can automatically switch to COOL mode or HEAT mode depending on
the temperature difference between setting temperature(Ts) and indoor temperature(Tf), and the fan speed is
adjustable.

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2) The wired controller will set the unit to operate on heating mode when Ts minus the Tf difference value is
over than ΔT, and changeover to cooling mode when Ts minus the Tf difference value is less than -ΔT. The
minimum operating mode switching interval is 15 minutes.
3) Under 3-pipe system auto operation mode, the auto mode icon "" flashes, and the COOL or HEAT icon
will be lighted up depending on the actual operation mode.
4) The default ΔT is 2°C, the value can be changed from 1~4°C. Please refer to WIRED REMOTE
CONTROLLER INITIAL PARAMETER SETTING for detailed setting methods.
5) The auto operation mode of the controller cannot be changed by other control terminals, such as wireless
remote controller, central remote controller, etc.
Notes:
1) The wired controller can be used in a 2-pipe system; in that case the controller should be set to 2-pipe
system mode.
2) For a 2-pipe system, auto operation mode will set the unit to operate on COOL mode and the fan speed is
set to auto and is not adjustable.
2.6.3 Codes description
The wired controller KJR-120A can display the fault codes when the units malfunction or protection, the code
as follow:
Codes Description
E0 Modes confliction of the indoor unit
E1 Communication malfunction between indoor/outdoor units
E2 T1 sensor malfunction
E3 T2 sensor malfunction
E4 T2B sensor malfunction
Ed Outdoor unit malfunction
EE Water level switch checking malfunction
F2 Wired controller EEPROM malfunction
F3 Communication malfunction between wired controller and indoor unit
F4 Wired controller temperature sensor malfunction
Notes:
1. The wired controller cannot display the EEPROM malfunction of the indoor unit
2. Under a state of fault display, wired controller does not respond to any button operation.
2.6.4 Wired controller initial parameters setting
1. Change the related functions of the controller through adjusting the initial parameters, details refer to table 1.
2.The wired remote controller initial parameter include two codes "XY", the first code "X" means function class,
the second code "Y" means the detailed configuration of this function.
3.Setting method:
① Simultaneously long press "Mode" and "Fan" button of the wired remote controller for 5 seconds to enter
the parameter setting state;

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② The value of this first code "X" is "0", press the temperature setting button and to adjust the
second code value;
③ After setting the second code value, press Silent/Ok button to switch the first code to the next
value;
④ When the first code value is "6", press Silent/Ok button again will exit the parameters setting.
3. The parameters setting function only under the situation which needs to adjust the default functions'
setting states; otherwise there is no need to do the setting.
Table 1
First
code
Function
Second code
0
1
2
3
4
0
Cool
-
only/Cool
-
Heat
selection
Cool
-
Heat
(Default) Cool-only /
/
/
2
Power
-
off memory
Yes(Default)
None
/
/
/
3
Filter
cleaning
reminding
Cancel the
reminding icon
1250 hours
2500 hours
(Default) 5000 hours
10000 hours
6
Centigrade/ Fahrenheit
display
Centigrade
(Default) Fahrenheit /
/
/
7
3
-
pipe system/ 2
-
pipe
system
3
-
pipe
system
(Default)
2
-
pipe
system /
/
/
8 Setting ΔT value / 1°C
2°C
(Default) 3°C 4°C
2.6.5 Installation
1) Safety precaution
Stated below are important safety issues that must be obeyed. Confirm there is no abnormal phenomena
during test operation after complete.
Installation by other persons may lead to imperfect installation, electric shock or fire. Improper installation
may lead to electric shock or fire. A random disassembly may cause abnormal operation or heating, which
may result in fire.
Do not install the controller in a place vulnerable to leakage of flammable gases. Once flammable gases
are leaked and left around the wired controller, fire may occur.
The wiring should adapt to the wired controller current. Otherwise, electric leakage or heating may occur
and result in fire. The specified cables shall be applied in the wiring. No external force may be applied to
the terminal. Otherwise, wire cut and heating may occur and result in fire.
Don’t place the wired controller near the lamps, to avoid the remote signal of the controller to be disturbed.
Do not install the unit and controller in a place with much oil, steam, sulfide gas. Otherwise, the product
may deform and fail.

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※ Preparation before Installation:
Make sure the following pasts has been prepared.
NO.
Name
QTY.
Remarks
1
Wire
d
Con
troller
1
/
2
Wood mounting screw
3
M4×20(For mounting on the wall)
3
mounting screw
3
M4×25(For mounting on the electrical switch box)
4
Installation manual
1
/
5
Owner's manual
1
/
6
Plastic screw bar
2
For fixing on the 86 electrician box
7
Switch
ing wires for
signal receiving board 1
For connecting the signal receiving board and
4-core shielding wire
8
Switching wires for wire
controller signal 1
For connecting the main control panel and 4
-
core
shielding wire
※ Prepare for the following at installation site.
NO. Name QTY. Remarks
1
4
-
core shielded cable
1
The
longest length should be less than 15m.
2
86 Electrician box
1
/
3
Wiring tube(insulating sleeve
and tightening screw) 1 /
2) Dimension: 120*120*20mm
3) Wiring Principle Sketch:
Figure A
Unit: mm
Figure A
Fig.1
Display Panel
3-cores shield wire
X Y (E)
WHITE
Indoor Main Board
RED
INDOOR UNI T CONNECTOR
INDOOR UNIT
2-cores wire
4-cores wire
Wired controller
YELLOW
BROWN
BLACK
RED
A B C D
GND(E)

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Notes:
1) This wired controller is compatible with the indoor unit of V4 plus heat recycling 3-pipe system and V4+
2-pipe system.
2) Please do not connect the wired controller and a CCM. to the same X, Y ,E port, otherwise it will lead to
conflict.
4) Back cover installation
 Use straight head screwdriver to insert into the buckling position in the bottom of the wired controller,
and spin the screwdriver to take down the back cover. (Pay attention to spinning direction, otherwise
will damage the back cover!) (Fig.2)
 Use three GB950-86 M4X20 screws to directly install the back cover on the wall. (Fig.3)
 Use two M4X25 GB823-88screws to install the back cover on the 86 electrician box, and use one
GB950-86 M4X20 screw for fixing on the wall. (Fig.4.1)
 Adjust the length of two plastic screw bars in the accessory to be standard length from the electrical
box screw bar to the wall. Make sure when install the screw bar to the electrical box screw bar, make
it as flat as the wall. (Fig.4.2)
 Use cross head screws to fix the wired controller bottom cover in the electric control box through the
screw bar. Make sure the wired controller bottom cover is on the same level after installation, and
then install the wired controller back to the bottom covers.
 Over fasten the screw will lead to deformation of the back cover.
Buckling position
Back cover
Front cover
Straight head screwdriver
Fig.2
Screw hole installed on
the wall,use three
GB950-86 M4X20
Fig.3
Screw hole fixed on
the wall,use one
GB950-86 M4X20
Screw hole installed
on 86 Electrician box,
use two M4X25
GB823-88
Fig.4.1
Fig.4.2
86 Electrician box
Signal switching wires
Back cover

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5) Wiring figure
A. Wiring, three outlet positions
B. Shielded wiring
6).Front cover installation
Notes:
1. After adjusting the front cover and then buckle the front cover; avoid clamping the communication switching
wire during installation. (Fig.9)
2. Correct install the back cover and firmly buckle the front cover and back cover, otherwise will make the front
cover drop off. (Fig. 10)
Upper left wire outlet
T
op side
wire outlet
Left middle
side wire
outlet
Fig.5
Cutting place of top
side wire outlet
Cutting place of upper
left wire outlet
Cutting place of left
middle side
wire outlet
Fig.7
Putty
Putty
Putty
Trap
Trap Trap
Fig.9 Fig.10