Midea MWHUK-05CMN8-BCK0 User manual

Windows AC
OPP MSII COMP
Service Manual
North America Air Conditioner

Contents
1. Model.....................................................................................................................................................................1
2.Dimension...............................................................................................................................................................1
3. Operation Modes and Instructions........................................................................................................................2
3.1 Display control.....................................................................................................................................................2
3.2 Remote control....................................................................................................................................................3
4 Wiring Diagram.......................................................................................................................................................4
5 Electronic function(For remote control models).....................................................................................................7
5.1 Terms and definitions ..........................................................................................................................................7
5.2 Protection function...............................................................................................................................................7
5.3 Auto mode ...........................................................................................................................................................7
5.4 Fan-only mode ....................................................................................................................................................7
5.5 Cooling mode......................................................................................................................................................7
5.6 Dry mode.............................................................................................................................................................8
5.7 Sleep mode.........................................................................................................................................................8
6 Installation and use notice......................................................................................................................................8
6.1 The inside should be higher than outside, to make sure that the water from evaporator will be easy to flow to
the outside. and the water will be helpful to get more capacity and more EER. ......................................................8
6.2 Cleaning filter ......................................................................................................................................................8
6.3 Cabinet Cleaning.................................................................................................................................................9
6.4 Winter Storage.....................................................................................................................................................9
7 Troubleshooting....................................................................................................................................................10
7.1 Troubleshooting.................................................................................................................................................10
7.2 Sensor malfunction............................................................................................................................................ 11
7.3 Characteristic of temperature sensor................................................................................................................ 11

1
1. Model
OPP
MWHUK-05CMN8-BCK0
MWHUK-06CMN8-BCK0
MWHUK-05CRN8-BCK0
MWHUK-06CRN8-BCK0
MWHUK-05CRN8-BCL1
MSII
MWHUK-06CRN8-BCL1
MWHUK-08CRN8-BCJ9
MWHUK-08CRN8-BCL0
MWIUKB11-08CRN8-BCK4N
COMP
MWAUK-10CRN8-BCJ9
MWAUK-10CRN8-BCL0
MWAUK-12CRN8-BCJ9
MWAUK-12CRN8-BCL0
MWAUK-14.5CRN8-BCK3N
MWAUKB11-10CRN8-BCK4N
MWAUKB11-12CRN8-BCK4N
2.Dimension
Dimension Mode
W (mm, inch)
H (mm, inch)
D (mm, inch)
OPP
406
16.0
306
12.0
335
13.2
MSII
471
18.5
340
13.4
400
15.7
MSII(B11)
470
18.5
340
13.4
410
16.1
COMPII
482
19.0
372
14.6
545
21.5
COMPIII(B11)
480
18.9
403
15.9
565
22.2

2
❽
❶
❷
❸
❹
❺
❻
❼
3. Operation Modes and Instructions
3.1 Display control
❶On-Off Button
Press to turn on or
off the unit.
NOTE: The unit will initiate
automatically the Energy
Saver function under cool,
Dry, Auto (only
Auto-Cooling and
Auto-Fan) modes.
❷Up and Down Button
Press or hold either
Up or Down the
setting temperature 1℃/ 2
℉each times from 62℉(17℃) to 88℉(30℃). Also
can be used for time adjust in Timer function.
Some models press and hold both Up and Down
buttons for 3 seconds, will change the display from ℉
to ℃.
❸Mode select Button
Press to change the operation mode, each time
you press the button, a mode is selected in a
sequence that goes from Auto, Cool, Dry and Fan.
The unit will initiate automatically the Energy Saver
function under Cool, Dry, Auto (only Auto-Cooling and
Auto Fan) modes.
Base on Energy Stars’ requirement.
❹Fan speed Button
Press to change the fan speed, each time you
press the button, the fan speed in four steps, Auto,
Low, Med and High.
On Dry mode, the fan speed is controlled at Low
automatically.
❺Timer Button
Press to start or stop the Auto On or Auto Off
function. Press or hold either Up or Down
the setting time from 0.0 to 24 hours.
❻Sleep Button
Press to start or stop the sleep function.
❼Energy Saver Button
Press to start or stop the energy saver function.
This function is available on Cool, Dry, Auto (only
Auto-Cooling and Auto-Fan) modes.
When the room temperature is meet the compressor
shut off condition, the fan motor will continue running
for 3 minutes, after that, the fan motor will running for
2 minutes every 10 minutes, until the compressor
start.
❽Check Filter Button
This function is a reminder to clean the Air Filter for
more efficient and more healthy. The LED light will
keep illuminate after 250 hours of operation, until
Press .

3
Mechanical:
①On-Off and Mode select switch
Use this switch to turn on or off the unit, and select the
operation mode for Low Cooling, High Cooling, Low
Fan, High Fan.
②Temperature switch
Use this switch to setting the temperature for cooling
mode.
●On-Off switch
Use this switch to turn on or off the
unit, the unit will only running at
cooling mode..
Note: To protect the compressor,
every time when the customer turn
on the unit, we suggest to wait for
three minutes.
3.2 Remote control
RG15A(B)/E
RG15B1/E
②
①
①
②

4
4 Wiring Diagram
MWHUK-05CMN8-BCK0, MWHUK-06CMN8-BCK0

5
MWHUK-05CRN8-BCK0, MWHUK-05CRN8-BCL1, MWHUK-06CRN8-BCK0, MWHUK-06CRN8-BCL1
MWHUK-08CRN8-BCJ9, MWIUKB11-08CRN8-BCK4N, MWHUK-08CRN8-BCL0

6
MWAUK-10CRN8-BCJ9, MWAUKB11-10CRN8-BCK4N, MWAUK-10CRN8-BCL0, MWAUK-12CRN8-BCJ9,
MWAUKB11-12CRN8-BCK4N, MWAUK-12CRN8-BCL0, MWAUK-14.5CRN8-BCK3N,
MWHUK-06CRN8-BCK0(22020310004197)

7
5 Electronic function(For remote
control models)
5.1 Terms and definitions
TA: Temperature of indoor ambient (T1)
TE: Temperature of evaporator (T2).
TC: Temperature of condenser (T3).
TO: Temperature of outdoor ambient (T4)
TS: The set temperature.
DAHT: Sensor of heater(T5)
5.2 Protection function
1. The compressor restart protection functions with a
delay of 3 minutes.
2. Sensor redundancy and automatic shutoff.
5.3 Auto mode
In Auto mode, the unit will choose cooling or
fan-only mode according to ΔT(ΔT =TA-Ts)
ΔT=TA-Ts
Running mode
ΔT＞4F
Cooling
-2F≤ΔT≤4F
Fan-only
5.4 Fan-only mode
1. The temperature can’t be controlled at the mode,
and the room ambient temperature is display on LED.
The temperature only display 32 to 99 ℉(0 to 37℃), lf
out of range will display LO or HI.
2. The Ion/ Timer functions are valid at the fan-only
mode.
3. Auto fan: In fan-only mode, AC operates the same
as auto fan in cooling mode with the temperature set
at 24°C(75°F).
5.5 Cooling mode
1. The temperature can be set from 62 to 86℉(17 to
30℃)
2. Compressor Control
The compressor operates as below:
(TA-Ts)℉
+2
0
Operation conditon
compressor off with a delay of 1 minute
compressor on
When TA≤TS, compressor off
When T1>TS+2℉, compressor on
3. Fan Control
In cooling mode, the indoor fan operates continuously.
The fan speed can be set to high, medium or low.
•The auto fan acts as below rules:
TA-TS( F)
High
Medium
Low
2.5
-1
0
o
4.Auto-defrosting function protection as below:
When TE is lower, it means that the evaporator frosts.
Then the unit starts defrosting, and the indoor fan
keeps working at the moment. When the temperature
is up, the unit stops defrosting.
TE ℉
55
30
compressor off
when TE is lower than 30℉
lasting for 5 seconds
compressor on

8
5.6 Dry mode
1. The temperature can be setting the same as
cooling mode.
2. The fan speed will keep running at low speed and
can’t be controlled at the mode.
5.7 Sleep mode
1. The sleep function is available in cooling, heating,
or auto mode.
2. In this mode the fan speed will be change to auto
fan.
3. In this mode the selected temperature will increase
(cooling) or decrease (heating) by 2°F/1 (or 2)°C 30
minutes after the mode is selected. The temperature
will then increase (cooling) or decrease (heating) by
another 2°F/1 (or 2)°C after an additional 30 minutes.
This new temperature will be maintained for 7 hours
before it returns to the originally selected temperature.
This ends the Sleep mode and the unit will continue to
operate as originally programmed.
4. When the function is start, if you do any operation
below, the function will stop.
•Press sleep button again, or use the remote
control to set anything.
•Turn off the unit.
•It is time to turn off the unit, for timer off
function.
6 Installation and use notice
6.1 The inside should be higher than outside, to
make sure that the water from evaporator will
be easy to flow to the outside. and the water
will be helpful to get more capacity and more
EER.
NOTE: Check that air conditioner is tilted back about
H(tiled about 3°to 4°downward to the outside). After
proper installation, condensate should not drain from
the overflow drain hole during normal use, correct the
slope otherwise.
6.2 Cleaning filter
The air filter should be checked at least once a month
to see if cleaning is necessary. Trapped particles in
the filter can build up and cause an accumulation of
frost on the cooling coils.
•Push the vent handle to the Vent Closed position
(where applicable). Open the front panel.
•Take the filter by the center and pull up and out.
•Wash the filter using liquid dishwashing detergent
and warm water. Rinse filter thoroughly. Gently shake
excess water from the filter. Be sure the filter is
thoroughly dry before replacing. Instead of washing,
you may vacuum the filter clean.

9
Notice:
Never use hot water over 104℉(40℃) to clean
the air filter. Never attempt to operate the unit
without the air filter.
Every time, when filter check LED light, we
suggest to cleaning the filter, it will be better for
healthy, and save energy.
When the AC has not used for a long time, like
one month or more, we suggest to cleaning the
filter before re-use.
6.3 Cabinet Cleaning
•Be sure to unplug the air conditioner to prevent
shock or fire hazard. The cabinet and front may be
dusted with an oil-free cloth or washed with a cloth
dampened in a solution of warm water and mild liquid
dishwashing detergent. Rinse thoroughly and wipe
dry.
•Never use harsh cleaners, wax or polish on the
cabinet front.
•Be sure to wring excess water from the cloth before
wiping around the controls. Excess water in or around
the controls may cause damage to the air conditioner.
•Plug in air conditioner.
6.4 Winter Storage
If you plan to store the air conditioner during the winter,
remove it carefully from the window according to the
installation instructions. Cover it with plastic or return it
to the original carton.

10
7 Troubleshooting
In general, possible trouble is classified in three kinds. One is called Starting Failure which is caused from an
electrical defect, another is ineffectiveAir Conditioning caused by a defect in the refrigeration circuit and improper
application, and the other is called the Structure Damage.
7.1 Troubleshooting
Problem
Solution
Air conditioner does not start
Wall plug disconnected. Push plug firmly into wall outlet.
House fuse blown or circuit breaker tripped. Replace fuse with time delay type or reset circuit breaker.
Plug Current Device Tripped. Press the RESET button.
Power is OFF. Turn power ON.
Air from unit does not feel cold enough
Room temperature below 17 ℃(62℉). Cooling may not occur until room temperature rises above 17 ℃(62℉).
Temperature sensing behind air filter element touching cold coil. Keep it from the cold coil.
Set to a Lower temperature.
Compressor stopped when changing modes. Wait for 3 minutes after set to the COOL mode.
Air conditioner cooling, but room is too
warm- ice forming on cooling coil behind
decorative front.
Outdoor temperature below 17 ℃(62℉). To defrost the coil, set FAN ONLY mode.
Air filter may be dirty. Clean filter. Refer to Care and Cleaning section. To defrost, set to FAN ONLY mode.
Thermostat set too cold for night-time cooling. To defrost the coil, set to FAN ONLY mode. Then, set temperature
to a Higher setting.
Air conditioner cooling, but room is too
warm- NO ice forming on cooling coil
behind decorative front.
Dirty air filter- air restricted. Clean air filter. Refer to Care and Cleaning section.
Temperature is set too High, set temperature to a lower setting.
Air directional louvers positioned improperly. Position louvers for better air distribution.
Front of units is blocked by drapes, blinds, furniture, etc. - restricts air distribution. Clear blockage in front of unit.
An open doors, windows, or register may allow cold air to escape. Close any doors, windows or registers.
The room may be too warm. Allow additional time to remove “Stored heat” from walls, ceiling, floor and furniture.
Air conditioner turns on and off rapidly
Dirty air filter- air restricted. Clean air filter
Outside temperature extremely hot. Set FAN speed to a Higher setting to bring air past cooling coils more
frequently.
Noise when unit is cooling
Air movement sound. This is normal. If too loud, set to a slower FAN setting.
Window vibration - poor installation. Refer to installation instructions or check with installer.
Water dripping INSIDE when unit is
cooling.
Improper installation. Tilt air conditioner slightly to the outside to allow water drainage. Refer to installation
instructions - check with installer.
Water dripping OUTSIDE when unit is
cooling.
Unit removing large quantity of moisture from humid room. This is normal during excessively humid days.
Remote Sensing Deactivating
Prematurely (some models)
Remote control not located within range. Place remote control within 20 feet and pointed in the general direction of
the air conditioner unit.
Remote control signal obstructed. Remove obstruction.
Room too cold
Set temperature too low. Increase set temperature.

11
7.2 Sensor malfunction
LED display
Stand for
AS
Room temperature sensor error
When error occurs, unplug the unit and plug it back in. If error repeats, call for service.
7.3 Characteristic of temperature sensor
Temp.℃
Temp.℉
Resistance KΩ
Temp.℃
Temp.℉
Resistance KΩ
-10
14
62.2756
31
87.8
7.6241
-9
15.8
58.7079
32
89.6
7.2946
-8
17.6
56.3694
33
91.4
6.9814
-7
19.4
52.2438
34
93.2
6.6835
-6
21.2
49.3161
35
95
6.4002
-5
23
46.5725
36
96.8
6.1306
-4
24.8
44.0000
37
98.6
5.8736
-3
26.6
41.5878
38
100.4
5.6296
-2
28.4
39.8239
39
102.2
5.3969
-1
30.2
37.1988
40
104
5.1752
0
32
35.2024
41
105.8
4.9639
1
33.8
33.3269
42
107.6
4.7625
2
35.6
31.5635
43
109.4
4.5705
3
37.4
29.9058
44
111.2
4.3874
4
39.2
28.3459
45
113
4.2126
5
41
26.8778
46
114.8
4.0459
6
42.8
25.4954
47
116.6
3.8867
7
44.6
24.1932
48
118.4
3.7348
8
46.4
22.5662
49
120.2
3.5896
9
48.2
21.8094
50
122
3.4510
10
50
20.7184
51
123.8
3.3185
11
51.8
19.6891
52
125.6
3.1918
12
53.6
18.7177
53
127.4
3.0707
13
55.4
17.8005
54
129.2
2.959
14
57.2
16.9341
55
131
2.8442
15
59
16.1156
56
132.8
2.7382
16
60.8
15.3418
57
134.6
2.6368
17
62.6
14.6181
58
136.4
2.5397
18
64.4
13.918
59
138.2
2.4468
19
66.2
13.2631
60
140
2.3577
20
68
12.6431
61
141.8
2.2725
21
69.8
12.0561
62
143.6
2.1907
22
71.6
11.5000
63
145.4
2.1124
23
73.4
10.9731
64
147.2
2.0373

12
24
75.2
10.4736
65
149
1.9653
25
77
10.000
66
150.8
1.8963
26
78.8
9.5507
67
152.6
1.8300
27
80.6
9.1245
68
154.4
1.7665
28
82.4
8.7198
69
156.2
1.7055
29
84.2
8.3357
70
158
1.6469
30
86
7.9708