Cooper & Hunter NORDIC MULTI LIGHT CHML-IC12RK User manual

Models:
CHML-IC12RK
CHML-IC18RK
CHML-IC24RK
NORDIC MULTI LIGHT SERIES
CASETTE TYPE INDOOR UNIT
Service manual
Air conditioners
Thank you for choosing Cooper&Hunter air conditioner, please read this service manual
carefully before operation and retain it for future reference.

Service Manual
Table of Contents
Part Ⅰ: Technical Information.......................................................................1
1. Summary......................................................................................................................1
2. Specications..........................................................................................................2
2.1 Specication Sheet...........................................................................................................2
3. Outline Dimension Diagram........................................................................5
4. Refrigerant System Diagram......................................................................6
5. Electrical Part...........................................................................................................7
5.1 Wiring Diagram.................................................................................................................7
5.2 PCB Printed Diagram .......................................................................................................9
6. Function and Control......................................................................................10
6.1 Remote Controller Introduction .....................................................................................10
6.2 Brief Description of Modes and Functions......................................................................14
Part Ⅱ: Installation and Maintenance .................................................17
7. Notes for Installation and Maintenance..........................................17
8. Installation................................................................................................................20
8.1 Installation Dimension Diagram......................................................................................20
8.2 Installation of Cassette Type ..........................................................................................21
8.2 Installation of Cassette Type ..........................................................................................21
9. Maintenance............................................................................................................23
9.1 Error Code List ...............................................................................................................23
9.2 Troubleshooting for Main Malfunction ............................................................................24
9.3 Maintenance Method for Normal Malfunction.................................................................30
10. Exploded View and Parts List ..............................................................32
11. Removal Procedure.......................................................................................38
Table of Contents

Service Manual
Table of Contents
Appendix:........................................................................................................................42
Appendix 1: Reference Sheet of Celsius and Fahrenheit ....................................................42
Appendix 2: Conguration of Connection Pipe.....................................................................42
Appendix 3: Pipe Expanding Method ...................................................................................43
Appendix 4: List of Resistance for Temperature Sensor ......................................................44

1
Technical Information
Service Manual
1. Summary
Part Ⅰ: Technical Information
Indoor Unit
CHML-IC12RK
CHML-IC18RK
CHML-IC24RK
Remote Controller
YT1F(MOTO)

2
Technical Information
Service Manual
Parameter Unit Value
Model CHML-IC12RKCHML-IC18RK
Power
Supply
Rated Voltage V~ 220-240 220-240
Rated Frequency Hz 50 50
Phases 1 1
Cooling Capacity KW 3.50 4.50
Heating Capacity KW 4.00 5.0
Air ow volume(SH/H/M/L/SL) m3/h 650/560/520/450/- 710/670/590/450/-
Dehumidifying Volume L/h 1.4 1.8
Fan Type Centrifugal Centrifugal
Fan Diameter-height mm Φ322–148 Φ322–148
Fan Motor Cooling Speed(SH/H/M/L/SL) rpm 800/700/650/560/- 900/850/750/580/-
Fan Motor Heating Speed(SH/H/M/L/SL) rpm 800/700/650/580/- 900/850/750/600/-
Fan Motor Power Output W 45 45
Fan motor running current A / /
Fan Motor Capacitor μF / /
Evaporator Material Aluminum n-copper tube Aluminum n-copper tube
Evaporator Pipe Diameter mm Φ7Φ7
Evaporator Number of Rows-Fin Pitch mm 2-1.4 2-1.4
Evaporator Length(L)XHeight(H)XWidth(W) mm 1320X190.5X25.4 1320X190.5X25.4
Fuse Current A 5 5
Sound Pressure Level(SH/H/M/L/SL) dB (A) 44/41/38/34/- 47/45/41/35/-
Sound Power Level(SH/H/M/L/SL) dB (A) 55/52/49/45/- 58/56/52/46/-
Dimension of Outline(LXWXH) mm 596X596X240 596X596X240
Dimension of Carton Box(LXWXH) mm 775X735X285 775X735X285
Dimension of Package(LXWXH) mm 778X738X300 778X738X300
Net Weight kg 20 20
Gross Weight kg 24 24
Liquid pipe mm Φ6Φ6
Gas Pipe(to indoor unit) mm Φ9.52 Φ12
2. Specications
2.1 Specication Sheet
The above data is subject to change without notice. Please refer to the nameplate of the unit.

3
Technical Information
Service Manual
Parameter Unit Value
Model CHML-IC24RK
Power
Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50
Phases 1
Cooling Capacity KW 7.10
Heating Capacity KW 8.0
Air ow volume(SH/H/M/L/SL) m3/h 1280/1220/1100/880/-
Dehumidifying Volume L/h 2.5
Fan Type Centrifugal
Fan Diameter-height mm Φ450-142
Fan Motor Cooling Speed(SH/H/M/L/SL) rpm 650/620/560/450/-
Fan Motor Heating Speed(SH/H/M/L/SL) rpm 650/620/560/460/-
Fan Motor Power Output W 45
Fan motor running current A /
Fan Motor Capacitor μF /
Evaporator Material Aluminum n-copper tube
Evaporator Pipe Diameter mm Φ7
Evaporator Number of Rows-Fin Pitch mm 2-1.5
Evaporator Length(L)XHeight(H)XWidth(W) mm 1965X171.5X25.4
Fuse Current A 5
Sound Pressure Level(SH/H/M/L/SL) dB (A) 47/45/41/36/-
Sound Power Level(SH/H/M/L/SL) dB (A) 58/56/52/47/-
Dimension of Outline(LXWXH) mm 840X840X240
Dimension of Carton Box(LXWXH) mm 960X960X310
Dimension of Package(LXWXH) mm 963X963X325
Net Weight kg 26
Gross Weight kg 32
Liquid pipe mm Φ9.52
Gas Pipe(to indoor unit) mm Φ16
The above data is subject to change without notice. Please refer to the nameplate of the unit.

4
Technical Information
Service Manual
Note: Nominal capacities are based on the follow conditions.
Mode Indoor ( ) Outdoor ( )
Cooling
DB:27 (80.6) DB:35(95)
WB:19(66.2)WB:24(75.2)
Heating
DB:20(68)DB:7(44.6)
WB:--(--)WB:6(42.8)
Piping Length 5m
The air volume is measured at the relevant standard external static pressure.
Noise is tested in the semianechoic room, so it should be slightly higher in the actual operation due
to environmental change.
Mode Range of Outdoor Temperature℃(󱙜)
Cooling
Heating
-15-48
-10-24

5
Technical Information
Service Manual
3. Outline Dimension Diagram
Unit:mm
CHML-IC24RK
CHML-IC12RKCHML-IC18RK
Item
Model A B C D E F G
670 666 600 496 145 240 596
950 840 780 680 145 240 -
CHML-IC12RK
CHML-IC18RK
CHML-IC24RK

6
Technical Information
Service Manual
4. Refrigerant System Diagram

7
Technical Information
Service Manual
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5. Electrical Part
5.1 Wiring Diagram
● Indoor Unit
● Instruction
Symbol Symbol Color Symbol Symbol Color Symbol Name
WH White GN Green CAP Jumper cap
YE Yellow BN Brown COMP Compressor
RD Red BU Blue Grounding wire
YEGN Yellow/Green BK Black / /
VT Violet OG Orange / /
Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model.
600007060110
CHML-IC12RKCHML-IC18RK

8
Technical Information
Service Manual
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These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.
CHML-IC24RK

9
Technical Information
Service Manual
5.2 PCB Printed Diagram
1
2
3
456789 10
12
11
13
16 1415
No. Name
1Interface of fan
2Interface of live wire
Fuse
3
4 Interface of netural wire
5Air terminal
6Terminal with outdoor unit
communication wire
7 Water pump control
8
Interface of ambient temperature sensor
9 Interface of tube temperature sensor
10 Water full detection terminal
12 Jumper cap terminal
Up&down swing motor
Display interface
11
14 Wired controller
16
13
Grounding wire
15 Interface of gate-control detection
● Top view
● Bottom view

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Technical Information
Service Manual
6. Function and Control
6.1 Remote Controller Introduction
Buttons on remote controller
Introduction for icons on display screen
7
2
1
8
10
12
15
14
13
11
9
6
5
4
3
1ON/OFF button
2MODE button
3+/- button
4FAN button
5I FEEL button
11 X-FAN button
Note: X-FAN is the same with BLOW
12 TEMP button
13 TURBO button
15 LIGHT button
14 SLEEP button
10 TIMER ON/TIMER OFF
button
9CLOCK button
Send signal
Turbo mode
X-fan mode
Set temperature
Set time
TIMER ON / TIMER OFF
Child lock
Up & down swing
Set fan speed
AIR function
I feel
Light
Temp. display type
:Set temp.
:Outdoor ambient temp.
:Indoor ambient temp.
Sleep mode
Clock
Health function
Heat mode
Fan mode
Dry mode
Cool mode
Auto mode
Operation mode
8button
6button
7button
Introduction for buttons on remote controller
Note:
●
After putting through the power, the air conditioner will give out a sound. Operation indictor " " is ON (red indicator).
After that, you can operate the air conditioner by using remote controller.
ON/OFF button1.
Press this button can turn on or turn off the air conditioner. After turning on the air conditioner, operation indicator " "
on indoor unit’s display is ON (green indicator. The colour is different for different models), and indoor unit will give out a sound.
● This is a general use remote controller, it could be used for the air conditioners with multifunction; For some function,
which the model doesn't have, if press the corresponding button on the remote controller that the unit will keep the
original running status.

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Technical Information
Service Manual
● After selecting auto mode, air conditioner will operate automatically according to ambient temperature. Set temperature
can’t be adjusted and will not be displayed as well. Press "
FAN" button can adjust fan speed. Press " " button can adjust
fan blowing angle.
● After selecting cool mode, air conditioner will operate under cool mode. Cool indicator " "on indoor unit is ON. Press "+"
or "-" button to adjust set tempe rature. Press "FAN" button to adjust fan speed. Press " " button to adjust fan blowing angle.
● When selecting dry mode, the air conditioner operates at low speed under dry mode. Dry indicator " " on indoor unit is ON.
Under dry mode, fan speed can’t
be adjusted. Press " " button to adjust fan blowing angle.
● When selecting fan mode, the air conditioner will only blow fan, no cooling and no heating. All indicators are OFF. Operation
indicator is ON. Press "FAN" button
to adjust fan speed. Press
● When selecting heating mode, the air conditioner operates under heat mode. Heat indicator " " on indoor unit is ON.
Press "+" or "-" button to adjust set temperature. Press "FAN" button to adjust fan speed. Press " " button to adjust
fan blowing angle. (Cooling only unit won’t receive heating mode signal. If setting heat mode with remote controller,
press ON/OFF button can’t start up the unit).
Note:
● For preventing cold air, after starting up heating mode, indoor unit will delay 1~5minutes to blow air (actual delay time is
depend on indoor ambient temperature).
● Set temperature range from remote controller: 16~30ć; Fan speed: auto, low speed, medium speed, high speed.
MODE button2.
Press this button to select your required operation mode.
AUTOCOOL FANDRY HEAT
" " button to adjust fan blowing angle.
FAN button
I FEEL button
4.
5.
6.
7.
Pressing this button can set fan speed circularly as: auto (AUTO), low( ) ,medium ( ), high( ).
Note:
● Under AUTO Speed,IDU fan motor will adjust the fan speed (high, medium or
low speed) according to ambient temperature.
● Fan speed under dry mode is low speed.
Press this button to start I FEEL function and " " will be displayed on the remote controller. After this function is set, th
e remoteed
controller will send the detect ambient temperature to the controller and the unit will automatically adjust the indoor temper
ature
according to the detected temperature. Press this button again to close I FEEL function and " " will disappear.
● Please put the remote controller near user when this function is set. Do not put the remote controller near the object of high
temperature or low temperature in order to avoid detecting inaccurate ambient temperature.
Press this button to set HEALTH function ON or OFF. After the unit is turned on, it defaults to HEALTH function ON.
Press this button to select AIR function ON or OFF.
button
button
(Only available for some models)
● This function is applicable to partial of models.
Auto
+/- button3.
● Press "+" or "-" button once increase or decrease set temperature 1ć.
Holding "+" or "-" button, 2s later, set temperature
tor on indoor unit will change accordingly. (Te mperature can’t be adjusted under auto mode)
● When setting TIMER ON, TIMER OFF or CLOCK, press "+" or "-" button to adjust time. (Refer to CLOCK, TIMER ON,
TIMER OFF buttons) When setting
TIMER ON, TIMER OFF or CLOCK, press "+" or "-" button to adjust time. (Refer
to CLOCK, TIMER ON, TIMER OFF buttons)
● When I FEEL function is turned on, the remote controller should be put within the area where indoor unit can receive the signal
sent by the remote controller.
on remote controller will

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Technical Information
Service Manual
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 "CLOCK" button to confirm the time. " " icon stops blinking.
Note:
● Clock time adopts 24-hour mode.
● The interval between two operation can’t exceeds 5s. Otherwise, remote controller will quit setting status. Operation for TIMER
CLOCK button
9.
TIMER ON / TIMER OFF button
10.
● TIMER 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.
Press "TIMER ON" to confirm it. The word "ON" will stop blinking. " " icon resumes displaying. Cancel TIMER ON:
Under the condition that TIMER ON is
8.
Press this button can select up&down swing angle. Fan blow angle can be selected circularly as below:
● When selecting " ", air conditioner is blowing fan automatically. Horizontal
louver will automatically swing up & down at
● When selecting " ǃ ǃ ǃ ǃ ", air conditioner is blowing fan at fixed
position. Horizontal louver will stop at the fixed position.
● When selecting " ǃ ǃ " , air conditioner is blowing fan at fixed angle.
Horizontal louver will send air at the fixed angle.
● Hold " "button above 2s to set your required swing angle. When reaching your
required angle, release the button.
Note:
● " ǃ ǃ " may not be available. When air conditioner receives this signal, the
air conditioner will blow fan automatically.
button
no display
(horizontal louvers stops
at current position)
ON/TIMER OFF is the same.
maximum angle.
started up, press "TIMER ON" button to cancel it.
● TIMER 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. Cancel TIMER OFF. Under the condition that
TIMER OFF is started up, press "TIMER OFF" button to cancel it.
Note:
● Under on and off status, you can set TIMER OFF or TIMER ON simultaneously.
● Before setting TIMER ON or TIMER OFF, please adjust the clock time.
● After 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.
X-FAN button
11.
12.
Press this button under cool and dry mode to start up x-fan function, and " " icon on remote controller will be displayed.
Press this button again to cancel x-fan function, and " "icon will disappear.
Note:
● When x-fan function is on, if the air conditioner is turned off, indoor fan will still
operate at low speed for a while to blow the
● During x-fan operation, press X-FAN button to turn off x-fan function. Indoor fan
will stop operation immediately.
TEMP button
By pressing this button, you can see indoor set temperature, indoor ambient temperature or outdoor ambient temperature on indoor
unit’s displa
y. The setting on remote controlleris selected circularly as below:
no display
● When selecting " " or no display with remote controller, temperature indicator on indoor unit displays set temperature.
● When selecting " " with remote controller, temperature indicator on indoor unit displays indoor ambient temperature.
residual water inside the air duct.

13
Technical Information
Service Manual
Sketch map for
replacing batteries
TURBO button13.
Under COOL or HEAT mode, press this button to turn to quick COOL or quick HEAT mode. " " icon is displayed on
remote controller. Press this button again to exit turbo function and " " icon will disappear.
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.
SLEEP button
LIGHT button
14.
15.
● When selecting " " with remote controller, temperature indicator on indoor unit
displays outdoor ambient temperature.
Note:
●
Outdoor temperature display is not available for some models. At that time, indoor
unit receives " "signal, while it displays
● It’s defaulted to display set temperature when turning on the unit.There is no display in the remote controller.
● Only for the models whose indoor unit has dual-8 display.
● When selecting displaying of indoor or outdoor ambient temperature, indoor temperature indicator displays corresponding
temperature and automatically turn
Under COOL, HEAT 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.
indoor set temperature.

14
Technical Information
Service Manual
6.2 Brief Description of Modes and Functions
1.Basic function of system
(1)Cooling mode
(1) Under this mode, fan and swing operates at setting status. Temperature setting range is 16~30OC.
(2) During malfunction of outdoor unit or the unit is stopped because of protection, indoor unit keeps original operation status.
(2)Drying mode
(1) Under this mode, fan operates at low speed and swing operates at setting status. Temperature setting range is 16~30OC.
(2) During malfunction of outdoor unit or the unit is stopped because of protection, indoor unit keeps original operation status.
(3) Protection status is same as that under cooling mode.
(4) Sleep function is not available for drying mode.
(3)Heating mode
(1) Under this mode, Temperature setting range is 16~30OC.
(2) Working condition and process for heating mode:
When turn on the unit under heating mode, indoor unit enters into cold air prevention status. When the unit is stopped or at OFF status,
and indoor unit has been started up just now, the unit enters into residual heat-blowing status.
(4)Working method for AUTO mode:
1.Working condition and process for AUTO mode:
a.Under AUTO mode, standard heating Tpreset=20OC and standard cooling Tpreset=25OC. The unit will switch mode automatically
according to ambient temperature.
2.Protection function
a. During cooling operation, protection function is same as that under cooling mode.
b. During heating operation, protection function is same as that under heating mode.
3. Display: Set temperature is the set value under each condition. Ambient temperature is (Tamb.-Tcompensation) for heat pump unit
and Tamb. for cooling only unit.
4. If theres I feel function, Tcompensation is 0. Others are same as above.
(5)Fan mode
Under this mode, indoor fan operates at set fan speed. Compressor, outdoor fan, 4-way valve and electric heating tube stop operation.
Indoor fan can select to operate at high, medium, low or auto fan speed. Temperature setting range is 16~30OC.
2. Other control
(1) Buzzer
Upon energization or availably operating the unit or remote controller, the buzzer will give out a beep.
(2) Auto button
If press this auto button when turning off the unit, the complete unit will operate at auto mode. Indoor fan operates at auto fan speed
and swing function is turned on. Press this auto button at ON status to turn off the unit.
(3) Auto fan
Heating mode: During auto heating mode or normal heating ode, auto fan speed will adjust the fan speed automatically according to
ambient temperature and set temperature.
(4) Sleep
After setting sleep function for a period of time, system will adjust set temperature automatically.
(5) Timer function:
General timer and clock timer functions are compatible by equipping remote controller with different functions.
(6) Memory function
memorize compensation temperature, off-peak energization value.
Memory content: mode, up&down swing, light, set temperature, set fan speed, general timer (clock timer cant be memorized).
After power recovery, the unit will be turned on automatically according to memory content.
(7) Health function
During operation of indoor fan, set health function by remote controller. Turn off the unit will also turn off health function.
Turn on the unit by pressing auto button, and the health is defaulted ON.(Health function is not available for this unit)

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Technical Information
Service Manual
(8)I feel control mode
After controller received I feel control signal and ambient temperature sent by remote controller, controller will work according to the ambient
temperature sent by remote controller.
(9)Compulsory defrosting function
(1) Start up compulsory defrosting function
Under ON status, set heating mode with remote controller and adjust the temperature to 16OC. Press “+, -, +, -, +,-” button successively
within 5s and the complete unit will enter into compulsory defrosting status. Meanwhile, heating indicator on indoor unit will ON 10s and OFF
0.5s successively. (Note: If complete unit has malfunction or stops operation due to protection, compulsory defrosting function can be started
up after malfunction or protection is resumed.
(2) Exit compulsory defrosting mode
After compulsory defrosting is started up, the complete unit will exit defrosting operation according to the actual defrosting result, and the
complete unit will resume normal heating operation.
(10)Refrigerant recovery function:
(1) Enter refrigerant recycling function
Within 5min after energizing (unit ON or OFF status is ok), continuously press LIGHT button for 3 times within 3s to enter refrigerant
recycling mode; Fo is displayed and refrigerant recycling function is started. At this moment, the maintenance people closes liquid valve.
After 5min, stick the thimble of maintenance valve with a tool. If there is no refrigerant spraying out, close the gas valve immediately and
then turn off the unit to remove the connection pipe.
(2) Exit refrigerant recycling function
After entering refrigerant recycling mode, when receive any remote control signal or enter refrigerant recycling mode for 25min, the unit will
exit refrigerant recycling mode automatically If the unit is in standby mode before refrigerant recycling, it will be still in standby mode after
nishing refrigerant recycling; if the unit is in ON status before refrigerant recycling, it will still run in original operation mode.
(11)Ambient temperature display control mode
1. When user set the remote controller to display set temperature (corresponding remote control code: 01), current set temperature will be
displayed.
2. Only when remote control signal is switched to indoor ambient temperature display status (corresponding remote control code: 10) from
other display status (corresponding remote control code: 00, 01,11),controller will display indoor ambient temperature for 3s and then turn
back to display set temperature.
Under this mode, indoor fan operates at set fan speed. Compressor, outdoor fan, 4-way valve and electric heating tube stop operation.
Indoor fan can select to operate at high, medium, low or auto fan speed. Temperature setting range is 16~30OC.
(12)Off-peak energization function:
Adjust compressors minimum stop time. The original minimum stop time is 180s and then we change to:
The time interval between two start-ups of compressor cant be less than 180+T s(0≤T≤15). T is the variable of controller. Thats to say
the minimum stop time of compressor is 180s~195s. Read-in T into memory chip when refurbish the memory chip each time. After power
recovery, compressor can only be started up after 180+T s at least.
(13) SE control mode
The unit operates at SE status.
(14) X-fan mode
When X-fan function is turned on, after turn off the unit, indoor fan will still operate at low speed for 2min and then the complete unit will be
turned off. When x-fan function is turned off, after turn off the unit, the complete unit will be turned off directly.
(15) 8ºC heating function
Under heating mode, you can set 8ºC heating function by remote controller. The system will operate at 8ºC set temperature.
(16) Turbo fan control function
Set turbo function under cooling or heating mode to enter into turbo fan speed. Press fan speed button to cancel turbo wind.
No turbo function under auto, dry or fan mode.

16
Technical Information
Service Manual
(17)Instructions to the Error Indicating Lamps on the Panel of the Cassette Type Unit.
Power and ON/OFF Indicating Lamp:
It goes red when the unit is powered on while it goes white when the unit is started.
Timer Indicating Lamp:
Timer indicator on indoor unit will be on when timer ON is set under off status and timer OFF is set under on status.
“88” Display:
When there is no error, the dual-8 nixie tube display the set temperature. After receiving the command of displaying
indoor ambient temperature from the remote controller, the dual-8 nixie tube displays indoor temperature for 3s and then
resume to display the set temperature. If there is error, error code will be displayed. If there’s multiple error, error codes
will be displayed in turn.
“Auto” button:
It’s used for turning on or turning off the unit. When use this button to turn in the unit, the unit is under auto mode.
“Test” button:It’s only used for the test units. This button is only valid within 3mins after the unit is energized.
NOTE:
(1) If the light of indoor unit is turned off, when operating the remote controller to send command, the display will be on for 3s and then
off.the remote control command.
(2) When the wired controller is connected, the indoor unit display is invalid and the unit won’t receive
Receiver "88" Dispaly" Auto" Button
"Test" Button
Power
Indicating Lamp
Timer
Indicating Lamp

17
Technical Information
Service Manual
1. Select the installation location according to the require-
ment of this manual.(See the requirements in installation
part)
2. Handle unit transportation with care; the unit should not
be carried by only one person if it is more than 20kg.
3. When installing the indoor unit and outdoor unit, a suf-
cient xing bolt must be installed; make sure the installation
support is rm.
4. Ware safety belt if the height of working is above 2m.
5. Use equipped components or appointed components dur-
ing installation.
6. Make sure no foreign objects are left in the unit after n-
ishing installation.
Electrical Safety Precautions:
7. Notes for Installation and Maintenance
Safety Precautions:
Important!
Please read the safety precautions carefully before
installation and maintenance.
The following contents are very important for installation
and maintenance.
Please follow the instructions below.
●The installation or maintenance must accord with the
instructions.
●Comply with all national electrical codes and local
electrical codes.
●Pay attention to the warnings and cautions in this
manual.
●All installation and maintenance shall be performed by
distributor or qualied person.
●All electric work must be performed by a licensed
technician according to local regulations and the
instructions given in this manual.
●Be caution during installation and maintenance. Prohibit
incorrect operation to prevent electric shock, casualty and
other accidents.
1. Cut off the power supply of air conditioner before
checking and maintenance.
2. The air condition must apply specialized circuit and
prohibit share the same circuit with other appliances.
3. The air conditioner should be installed in suitable
location and ensure the power plug is touchable.
4. Make sure each wiring terminal is connected rmly
during installation and maintenance.
5. Have the unit adequately grounded. The grounding
wire cant be used for other purposes.
6. Must apply protective accessories such as protective
boards, cable-cross loop and wire clip.
7. The live wire, neutral wire and grounding wire of
power supply must be corresponding to the live wire,
neutral wire and grounding wire of the air conditioner.
8. The power cord and power connection wires cant be
pressed by hard objects.
9. If power cord or connection wire is broken, it must be
replaced by a qualied person.
1. Avoid contact between refrigerant and re as it generates
poisonous gas; Prohibit prolong the connection pipe by
welding.
2. Apply specied refrigerant only. Never have it mixed with
any other refrigerant. Never have air remain in the refrigerant
line as it may lead to rupture or other hazards.
3. Make sure no refrigerant gas is leaking out when
installation is completed.
4. If there is refrigerant leakage, please take sufcient
measure to minimize the density of refrigerant.
5. Never touch the refrigerant piping or compressor without
wearing glove to avoid scald or frostbite.
Warnings
Refrigerant Safety Precautions:
Improper installation may lead to re hazard, explosion,
electric shock or injury.
Installation Safety Precautions:
Part Ⅱ: Installation and Maintenance
10. If the power cord or connection wire is not long enough,
please get the specialized power cord or connection wire
from the manufacture or distributor. Prohibit prolong the wire
by yourself.
11. For the air conditioner without plug, an air switch must
be installed in the circuit. The air switch should be all-pole
parting and the contact parting distance should be more than
3mm.
12. Make sure all wires and pipes are connected properly and
the valves are opened before energizing.
13. Check if there is electric leakage on the unit body. If yes,
please eliminate the electric leakage.
14. Replace the fuse with a new one of the same specication
if it is burnt down; dont replace it with a cooper wire or
conducting wire.
15. If the unit is to be installed in a humid place, the circuit
breaker must be installed.