Willis WCM18MH18S/I User manual

Split Air Conditioner
Thank you for choosing our product.
For proper operation, please read and keep this manual carefully.
MODEL :
WCM24MH18S/I
WCM18MH18S/I

This appliance is not intended for use by persons (including children) with reduced physical, sensory
or mental capabilities or lack of experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure they are away from the appliance.
Content
Operation Notices
Precautions............................................................................................................1
Parts name ............................................................................................................2
Screen Operation Guide
Buttons on remote controller .................................................................................3
Introduction for icons on display screen ................................................................3
Introduction for buttons on remote controller.........................................................4
Function introduction for combination buttons.......................................................8
Operation guide.....................................................................................................9
Replacement of batteries in remote controller.......................................................9
Emergency operation ...........................................................................................10
Maintenance
Clean and maintenance........................................................................................10
Malfunction
Malfunction analysis ............................................................................................ 13
Installation Notice
Installation dimension diagram............................................................................17
Tools for installation.............................................................................................18
Selection of installation location ..........................................................................18
Requirements for electric connection ..................................................................19
Installation
Installation of indoor unit......................................................................................20
Check after installation ........................................................................................25
Test and operation
Test operation......................................................................................................25
Attachment
.........................................................................26
Pipe expanding method
Configuration of connection pipe
.......................................................................................28
R410A(R32/125: 50/50): 1975

1
Precautions
Warning
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cause electric shock.
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may be broken.
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damage. Please contact dealer when you need to repair air conditioner.
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person can perform the work. Otherwise, it may cause personal injury or
damage.
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damage or personal injury.
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personal injury or damage.
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electric shock.
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Otherwise, it may cause personal injury or damage.
Working temperature range
Indoor side DB/WB(ć) Outdoor side DB/WB(ć)
Maximum cooling 32/23 43/26
Maximum heating 27/- 24/18
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18ć~43ć; for heat pump unit is -7ć~ 43ć.

2
(Display content or position may be different from above
graphics, please refer to actual products)
Parts name
Indoor Unit
air inlet
panel
aux.button
horizontal louver
air outlet
heating
indicator
temp.
indicator
cooling
indicator
power
indicator
receiver
window
drying
indicator
display
Notice:
Actual product may be different from above graphics, please refer to actual
products.
remote controller

3
Buttons on remote controller
Introduction for icons on display screen
1
2
5
7
9
11
10
12
8
6
4
3
1
2
3
4
5
6
7
8
9
10
11
12
ON/OFF button
MODE button
+/- button
FAN button
button
X-FAN button
Note: X-FAN is the same with BLOW
TEMP button
TURBO button
LIGHT button
SLEEP button
TIMER ON/TIMER OFF
button
CLOCK button
Send signal
Turbo mode
Set temperature
Set time
TIMER ON/TIMER OFF
Child lock
Up & down swing
Set fan speed
X-fan mode
Light
Temp. display type
: Set temp.
: Outdoor ambient temp.
: Indoor ambient temp.
Sleep mode
Clock
Heat mode
Fan mode
Dry mode
Cool mode
Auto mode
Operation mode

4
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Note:
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Introduction for buttons on remote controller
Note:
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02'(EXWWRQ
1
2
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5
Introduction for buttons on remote controller
FAN button
4
Pressing this button can set fan speed circularly as: auto (AUTO), low( ), medium
( ), high( ).
Auto
Note:
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to ambient temperature.
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5
Press this button can select up&down swing angle. Fan blow angle can be selected
circularly as below:
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louver will automatically swing up & down at maximum angle.
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Ɣ:KHQVHOHFWLQJǃǃ
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required angle, release the button.
Note:
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air conditioner will blow fan automatically.
button
no display
(horizontal louvers stops
at current position)
+/- button
3
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tor on indoor unit will change accordingly. (Temperature can’t be adjusted under
auto mode)
Ɣ:KHQVHWWLQJ TIMER ON, TIMER OFF oU&/2&.SUHVVRUEXWWRQWR
adjust time. (Refer to CLOCK, TIMER ON, 7,0(52))EXWWRQV:KHQVHWWLQJ
TIMER ON, TIMER OFF or CLOCK, preVVRUEXWWRQWRDGMXVWWLPH5HIHU
to CLOCK, TIMER ON, TIMER OFF buttons)

6
Press this button to set clock time. " " icon on remote controller will blink. Press
"+" or "-" button within 5s to set clock time. Each pressing of "+" or "-" button, clock
time will increase or decrease 1 minute. If hold "+" or "-" button, 2s later, time will
change quickly. Release this button when reaching your required time. Press
Note:
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ƔThe interval between two operation can’t exceeds 5s. Otherwise, remote contro-
ller will quit setting status. Operation for TIMER ON/TIMER OFF is the same.
&/2&.EXWWRn
6
Introduction for buttons on remote controller
TIMER ON / TIMER OFF button
7
ƔTIMER ON button
"TIMER ON" button can set the time for timer on. After pressing this button, " "
icon disappears and the word "ON" on remote controller blinks. Press "+" or "-"
button to adjust TIMER ON setting. After each pressing "+" or "-" button, TIMER
ON setting will increase or decrease 1min. Hold "+" or "-" button, 2s later, the
time will change quickly until reaching your required time.
UHVXPHVGLVSOD\LQJ&DQFHO TIMER ON: Under the condition that TIMER ON is
started up, press "TIMER ON" button to cancel it.
ƔTIMER OFF button
"TIMER OFF" button can set the time for timer off. After pressing this button," "
icon disappears and the word "OFF" on remote controller blinks. Press "+" or "-"
button to adjust TIMER OFF setting. After each pressing "+" or "-" button, TIMER
OFF setting will increase or decrease 1min. Hold "+" or "-" button, 2s later, the
time will change quickly until reaching your required time.
Press "TIMER OFF" word "OFF" will stop blinking. " " icon resumes displaying.
&DQFHO TIMER OFF. Under the condition that TIMER OFF is started up, press
"TIMER OFF" button to cancel it.
Note:
Ɣ8QGHURQDQGRff status, you can set TIMER OFF or TIMER ON simultaneously.
Ɣ%HIRUHVHWWLQJ TIMER ON or TIMER OFF, please adjust the clock time.
ƔAfter starting up TIMER ON or TIMER OFF, set the constant circulating valid.
After that, air conditioner will be turned on or turned off according to setting time.
ON/OFF button has no effect on setting. If you don’t need this function, please
use remote controller to cancel it.

7
TEMP button
9
Introduction for buttons on remote controller
By pressing this button, you can see indoor set temperature, indoor ambient temp-
erature or outdoor ambient temperature on indoor unit’s display. The setting on
remote controlleris selected circularly as below:
no display
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on indoor unit displays set temperature.
Ɣ:KHQVHOHFWLQJZLWKUHPRWHFRQWUROOHr, temperature indicator on indoor unit
displays indoor ambient temperature.
Ɣ:KHQVHOHFWLQJZLWKUHPRWHFRQWUROOHr, temperature indicator on indoor unit
displays outdoor ambient temperature.
Note:
Ɣ Outdoor temperature display is not available for some models. At that time, indoor
XQLWUHFHLYHV signal, while it displays indoor set temperature.
Ɣ,W’s defaulted to display set temperature when turning on the unit. There is no
display in the remote controller.
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temperature indicator displays corresponding temperature and automatically turn
X-FAN button
8
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on remote controller will be displayed. Press this button again to cancel x-fan
IXQFWLRQDQG icon will disappear.
Note:
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operate at low speed for a while to blow the residual water inside the air duct.
Ɣ'XULQJ[IDQRSHUDWLRQSUHVV;FAN button to turn ofI[IDQIXQFWLRQ,QGRRUIDQ
will stop operation immediately.
TURBO button
10
Under COOL or HEAT mode, press this button to turn to quick COOL or quick
HEATPRGHLFRQLVGLVSOD\HGRQUHPRWHFRQWUROOHr. Press this button again
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