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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212))EXWWRQ
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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+ROGLQJRUEXWWRQVODWHr, set temperature on remote controller will
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:
Ɣ&ORFNWLPHDGRSWVKRXUPRGH
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
WRH[LWWXUERIXQFWLRQDQGLFRQZLOOGLVDSSHDr.

8
Function introduction for combination buttons
Child lock function
Press "+" and "-" simultaneously to turn on or turn off child lock function. When
child lock function is on, " " icon is displayed on remote controller. If you operate
the remote controller, the " " icon will blink three times without sending signal to
the unit.
Temperature display switchover function
Under OFF status, press "-" and "MODE" buttons simultaneously to switch temp-
erature display between ćand .
Introduction for buttons on remote controller
Press this button to turn off display light on indoor unit. " " icon on remote
controller disappears. Press this button again to turn on display light. " " icon is
displayed.
Under COOL, HEAT or DRY mode, press this button to start up sleep function.
" " icon is displayed on remote controller. Press this button again to cancel sleep
function and " " icon will disappear.
SLEEP button
LIGHT button
11
12

9
1. After putting through the power, press "ON/OFF" button on remote controller to
turn on the air conditioner.
2. Press "MODE" button to select your required mode: AUTO, COOL, DRY, FAN,
HEAT.
3. Press "+" or "-" button to set your required temperature. (Temperature can’t be
adjusted under auto mode).
4. Press "FAN" button to set your required fan speed: auto, low, medium and high
speed.
5. Press " " button to select fan blowing angle.
Operation guide
Replacement of batteries in remote controller
1. Press the back side of remote controller marked
the cover of battery box along the arrow direction.
2. Replace two 7# (AAA 1.5V) dry batteries, and
make sure the position of "+" polar and "-" polar
are correct.
3. Reinstall the cover of battery box.
signal sender battery
Cover of battery box
remove
reinstall
Note:
Ɣ'XULQJRSHUDWLRQSRLQWWKHUHPRWHFRQWUROVLJQDOVHQGHUDWWKHUHFHLYLQJ
window on indoor unit.
ƔThe distance between signal sender and receiving window should be no
more than 8m, and there should be no obstacles between them.
or wireless telephone; remote controller should be close to indoor unit during
operation.
Ɣ5HSODFHQHZEDWWHULHVRIWKHVDPHPRGHOZKHQUHSODFHPHQWLVUHTXLUHG
Ɣ:KHQ\RXGRQ¶WXVHUHPRWHFRQWUROOHUIRUDORQJWLPHSOHDVHWDNHRXWWKH
batteries.
Ɣ,IWKHGLVSOD\RQUHPRWHFRQWUROOHULVIX]]\RUWKHUH’s no display, please
replace batteries.

10
Emergency operation
If remote controller is lost or damaged, please use auxiliary button to turn
on or turn off the air conditioner. The operation in details are as below:
air conditioner. When the air conditioner is turned on, it will operate under
auto mode.
aux. button
panel
Clean and maintenance
Note:
ŶTurn off the air conditioner and disconnect the power before cleaning the air
conditioner to avoid electric shock.
Ŷ'RQRWZDVKWKHDLUFRQGLWLRQHUZLWKZDWHUWRDYRLGHOHFWULFVKRFN
Ŷ'RQRWXVHYRODWLOHOLTXLGWRFOHDQWKHDLUFRQGLWLRQHr.
Clean surface of indoor unit
When the surface of indoor unit is dirty, it is recommended to use a soft dry cloth
or wet cloth to wipe it.
Note:
Ɣ'RQRWUHPRYHWKHSDQHOZKHQFOHDQLQJLW

11
Clean and maintenance
1
2
3
4
Open panel
Pull out the panel to a certain Ɣ8VHGXVWFDWFKHURUZDWHUWR
WKHZDWHUEHORZć) to clean
LWDQGWKHQSXWLWLQDVKDG\
DQGFRROSODFHWRGU\.
panel cover tightl\.
Note:
RSHUDWLRQHQYLURQPHQWFOHDQIUHTXHQF\FDQEHLQFUHDVHG

12
Clean and maintenance
Checking before use-season
Checking after use-season
1. Check whether air inlets and air outlets are blocked.
2. Check whether circuit break, plug and socket are in good condition.
4. Check whether drainage pipe is damaged.
1. Disconnect power supply.
Notice for recovery
1. Many packing materials are recyclable materials.
Please dispose them in appropriate recycling unit.
2. If you want to dispose the air conditioner, please contact local dealer or
consultant service center for the correct disposal method.

13
Malfunction analysis
General phenomenon analysis
Please check below items before asking for maintenance. If the malfunction still
Phenomenon Check items Solution
Indoor unit
can’t receive
remote
controller’s
signal or
remote
controller
has no
action.
Ɣ:KHWKHULWVLQWHUIHUHGVHYHUHO\
(such as static electricit\, stable
voltage)?
Ɣ:KHWKHUUHPRWHFRQWUROOHULV
within the signal receiving
range?
Ɣ:KHWKHUWKHUHDUHREVWDFOHV"
Ɣ:KHWKHUUHPRWHFRQWUROOHULV
pointing at the receiving
window?
Ɣ,VVHQVLWLYLW\RIUHPRWHFRQWUR
OOHUORZIX]]\GLVSOD\DQGQR
GLVSOD\"
Ɣ1RGLVSOD\ZKHQRSHUDWLQJ
remote controller?
Ɣ)OXRUHVFHQWODPSLQURRP"
Ɣ3XOORXWWKHSOXJ5HLQVHUW
the plug after about 3min, and
then turn on the unit again.
Ɣ6LJQDOUHFHLYLQJUDQJHLVP
Ɣ5HPRYHREVWDFOHV
Ɣ
Select proper angle and point
WKHUHPRWHFRQWUROOHUDWWKHUH
ceiving window on indoor unit.
Ɣ&KHFNWKHEDWWHULHV,IWKH
power of batteries is too low,
please replace them.
ƔTake the remote controller
close to indoor unit.
DQGWKHQWU\LWDJDLQ
Ɣ&KHFNZKHWKHUUHPRWHFRQW
roller appears to be damaged.
,I\HVUHSODFHLW
1RDLU
emitted
from
indoor
unit
ƔAir inlet or air outlet of indoor
unit is blocked?
Ɣ(OLPLQDWHREVWDFOHV
Ɣ8QGHUKHDWLQJPRGHLQGRRU
temperature is reached to set
temperature?
Ɣ $IWHUUHDFKLQJWRVHWWHPSHU
DWXUHLQGRRUXQLWZLOOVWRSEO
owing out air.
Ɣ+HDWLQJPRGHLVWXUQHGRQMXVW
now?
Ɣ,QRUGHUWRSUHYHQWEORZLQJ
out cold air, indoor unit will be
VWDUWHGDIWHUGHOD\LQJIRUVHY
HUDOPLQXWHVZKLFKLVDQRU
mal phenomenon.

14
Malfunction analysis
Ɣ3RZHUIDLOXUH"
Ɣ,VSOXJORRVH"
Ɣ&LUFXLWEUHDNWULSVRIIRU
IXVHLVEXUQWRXW"
Ɣ:LULQJKDVPDOIXQFWLRQ"
Ɣ8QLWKDVUHVWDUWHGLPPHGLDWHO\
DIWHUVWRSSLQJRSHUDWLRQ"
Ɣ:KHWKHUWKHIXQFWLRQVHWWLQJ
IRUUHPRWHFRQWUROOHULV
FRUUHFW"
Ɣ5HVHWWKHIXQFWLRQ
Ɣ:DLWIRUPLQDQGWKHQWXUQ
RQWKHXQLWDJDLQ
Ɣ$VNSURIHVVLRQDOWRUHSODFHLW
Ɣ$VNSURIHVVLRQDOWRUHSODFH
FLUFXLWEUHDNRUIXVH
Ɣ5HLQVHUWWKHSOXJ
Ɣ:DLWXQWLOSRZHUUHFRYHU\
$LUFRQGLW
LRQHUFDQ¶W
RSHUDWH
0LVWLVHP
LWWHGIURP
LQGRRUXQLW¶V
DLURXWOHW
Ɣ,QGRRUWHPSHUDWXUHDQGKXP
LGLW\LVKLJK"
Ɣ%HFDXVHLQGRRUDLULVFRROHG
UDSLGO\$IWHUDZKLOHLQGRRU
WHPSHUDWXUHDQGKXPLGLW\ZLOO
EHGHFUHDVHDQGPLVWZLOO
GLVDSSHDU
3KHQRPHQRQ &KHFNLWHPV 6ROXWLRQ
6HWWHPSHU
DWXUHFDQ¶W
EHDGMXVWHG
Ɣ8QLWLVRSHUDWLQJXQGHUDXWR
PRGH"
ƔTHPSHUDWXUHFDQ¶WEHDGMX
VWHGXQGHUDXWRPRGH
3OHDVHVZLWFKWKHRSHUDWLRQ
PRGHLI\RXQHHGWRDGMXVW
WHPSHUDWXUH
ƔYRXUUHTXLUHGWHPSHUDWXUH
H[FHHGVWKHVHWWHPSHUDWXUH
UDQJH"
Ɣ6HWWHPSHUDWXUHUDQJH
ćać
&RROLQJ
KHDWLQJ
HIIHFWLV
QRWJRRG
ƔVROWDJHLVWRRORZ" Ɣ:DLWXQWLOWKHYROWDJH
UHVXPHVQRUPDO
Ɣ)LOWHULVGLUW\"
Ɣ6HWWHPSHUDWXUHLVLQSURSHU
UDQJH"
ƔAGMXVWWHPSHUDWXUHWRSURSHU
UDQJH
Ɣ'RRUDQGZLQGRZDUHRSHQ" Ɣ&ORVHGRRUDQGZLQGRZ

15
Phenomenon Check items Solution
Odours are
emitted
Ɣ:KHWKHUWKHUH’s odour source,
such as furniture and cigarette,
etc.
Ɣ(OLPLQDWHWKHRGRXUVRXUFH
Air conditio-
ner operates
abnormally
Ɣ:KHWKHUWKHUH’s interference,
such as thunder, wireless
devices, etc.
Ɣ'LVFRQQHFWSRZHr, put back
power, and then turn on the
unit again.
“:ater
noise
ƔAir conditioner is turned on or
turned off just now?
ƔThe noise is the sound of
the unit, which is a normal
phenomenon.
Cracking
noise
ƔAir conditioner is turned on or
turned off just now?
ƔThis is the sound of friction
caused by expansion and/or
contraction of panel or other
parts due to the change of
temperature.
Malfunction analysis

16
Malfunction analysis
Error Code
ƔWhen air conditioner status is abnormal, temperature indicator on indoor unit will
ation of error code.
Indoor
display
Error code
Above indicator diagram is only
for reference. Please refer to
actual product for the actual
indicator and position.
Ŷ:KHQEHORZSKHQRPHQRQRFFXUVSOease turn off air conditioner and discon-
for service.
Ɣ3RZHUFRUGLVRYHUKHDWLQJRUGDPDJHG
Ɣ There’s abnormal sound during operation.
Ɣ&LUFXLWEUHDNWULSVRff frequently.
Ɣ Air conditioner gives off burning smell.
Ɣ,QGRRUXQLWLVOHDNLQJ
Ŷ,IWKHDLUFRQGLWLRQHURSHUDWHVXQGHUDbnormal conditions, it may cause
Warning
service.
Error code
E5
H1
H6
&
F1
F2
E6
Troubleshooting
t
It can be eliminated af
Means defrosting status. It’s the normal phenomenon.
er restarting the unit. If not, please
It can be eliminated after restarting the unit. If not, please
It can be eliminated after restarting the unit. If not, please
contact qualified professionals for service.

17
Installation dimension diagram
At least 250cm
At least 15cm
At least 300cm
Space to the ceiling
Space to the obstruction
At least 15cm
At least 15cm
Space to the wall
Space to the wall