Classic MWDUC08AR User manual

North America Air Conditioner
Dimensions W (mm, inch) H (mm, inch) D (mm, inch)
MWDUC08AR 471 18.5 340 13.4 400 15.7
MWDUC10AR/MWDUC12AR 482 19.0 372 14.6 545 21.5
MWDUC
Service Manual

1. Operation Modes and
Instructions
1.1 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
(onlyAuto-Cooling and
Auto-Fan) modes.
❷Up and Down Button
Press or hold either
Up or Down the
setting temp 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 (onlyAuto-
Cooling and Auto-Fan) modes.
When the room temp 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
keepilluminateafter250hoursof operation,untilPress
.
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.
❽
❶
❷
❸❹
❺
❻
❼
②
①
①
②

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.
1.2 Remote control
Button ❶to ❽is the same with the display control.
❾One Touch Button
Press this button, the unit will running into the Cooling
mode, auto fan speed, and the setting temperature is
80℉/26℃.
And the timer function will be cancelled.
❿Clean Air Button (Optional)
Press this button to turn on the ionizer.
⓫Fellow Me Button (Optional)
Press this button to turn on this function, the remote
has a temperature sensor, to instead of the room
temperature sensor, every 3 minutes the remote will
send a temperature to AC, if the unit do not get any
signal from remote for 7 minutes, the unit will turn off
this function.
⓬Cancel Button
Press this button to stop the time on or off function. If
only set timer off, and the unit has been turn off, press
cancel button, the unit will turn on.
⓭Clock Button
Press to set the time.
⓮LED Button
Press to off or light the digit LED display, only can be
used when the unit is on.
⓯Reset Button
Reset the remote control to the initial settings.
⓰Lock Button
Lock the remote control, and do not accept any
operation until press the Lock button again.
2 Electronic function
2.1 Terms and definitions
TA: Temperature of indoor ambient (T1)
TE: Temperature of evaporator (T2).
TS: The set temperature.
DAHT: Sensor of heater
2.2 Protection function
The compressor restart protection functions with a
delay of 3 minutes.
Sensor protection at open or short circuit.
2.3 Fan-only mode
The temperature can’t be controlled at the mode,
and the room ambient temperature is display on
LED. The temp only display 32 to 99 ℉(0 to 37℃),
lf out of range will display LO or HI
The Ion/ Timer functions are valid at the fan-only
mode.
2.4 Cooling mode
The temp can be set from 62 to 86℉(17 to 30℃)
The compressor will be activated by sensing the
difference between setting temperature and the
actual ambient room temperature.
The compressor operates as below:

When TA≤TS, compressor off
When T1>TS+2℉, compressor on
The Ion/ Timer/ Sleep/ Energy Saver/ Follow Me
functions are valid at the cooling mode.
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.
2.5 Dry mode
The temp can be setting the same as Cooling
mode.
The fan speed is low and can’t be controlled at the
mode.
2.6 Sleep mode
This function is 7 hours. And only can be used in
Cool, Dry and Heat mode.
In this function the fan speed will be change to
auto fan.
In this function, the first and second 30minuts, the
setting temp will up (or down for heating mode) 2
℉(1℃), after that will keep 6 hours, until the
function stop.
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.
Example:
3 Improvement to meet the 2013
Energy Star’s requirement
Requirement
Old
New
I
f the compressor
stop, the fan motor
running time should
less than 5 minutes,
after that, the fan
motor running time
should less than 17%
W
hen compressor
turn off, the fan motor
will keep running 3
minutes then stop,
after that, every 10
minutes the fan motor
will start 2 minutes
until the compressor
start.
Do not change.
Frist start should be
energy saver mode.
Auto mode, 70F, auto
fan
Cooling energy saver
mode, 70F, auto fan.
If it is running at Cool,
Auto, Dry mode
before turn off, when
you turn on the unit, it
should running into
the energy saver
mode.
T
he same with
before.
For
Fan or Heating
mode, it will the same
with before.
F
or others, If the
condition can meet
the compressor’s
running requirement
for Cooling or Dry, the
unit will turn on the
Energy Saver mode.
If not, the fan motor
will keep running 3
minutes then stop,
after that, every 10
minutes the fan motor
will start 2 minutes
until the compressor
start.
Should has the filter
cleaning notice.
Filter Check light Filter Check light
4 Internal Structures
(TA-Ts)℉
+2
0
Operation conditon
compressor off with a delay of 1 minute
compressor on
TE ℉
55
30
compressor off
when TE is lower than 30
℉
lasting for 5 seconds
compressor on

5 Installation and use notice
5.1 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.

5.2 Cleaning filter
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 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.
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.
Control is OFF. Turn Control ON and set to desired
setting.
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 element touching cold coil,
located behind air filter. Straighten tube away from
coil.
Reset to a Lower temperature.
Compressor shut-off by changing modes. Wait
approximately 3 minutes and listen for compressor
to restart when set in 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.
Doors/ windows/registers, etc. Open- cold air
escapes. Close doors, windows, registers.
Unit recently turned on in hot room. 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 & 180° , radius of the
front of the unit.
Remote control signal obstructed. Remove
obstruction.
Room too cold Set temperature too low. Increase set temperature.
6.2 Sensor malfunction
LED
display Stand for
AS Room temperature sensor error
LO
Sensor protection at open circuit sensor
error
HI
Sensor protection at short circuit sensor
error
HS Electric heating sensor error
ES Evaporator
temperature sensor at open or
short circuit
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
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

7 Exploded view
1 Front panel assembly 15 Rear separating
1.1 Front panel 16 Left linker of fan motor
1.2 Air outlet frame 17 Right linker of fan motor
1.4 Panel frame 18 Centrifugal fan
1.5 Vertical vane I 19 Volute shell (below)
1.6 Louver holder 20 Mid volute shell
1.7 Vertical vane II 21 Volute shell (above)
2 Evaporator assembly 23 Electronic control box assembly
3 Compressor 23.2 Capacitor of compressor
4 Condenser assembly 23.3 Capacitor clip
5 Installation accessory 23.5 Power cord
7 Cabinet assembly 23.6 Electronic control box
8 Top shutter frame 23.7 Cover of electronic control box
9 Chassis assembly 23.8 Thermostat
11 Suction pipe 23.9 Main switch
12 Discharge pipe assembly 25 Air filter
13 Axial flow fan 27 Knob switch
14 Asynchronous motor 28 Spring for knob

Classic Industries, Inc.
7101 NW 43rd Street
Miami, FL 33166
[e-mail]