LENNOX L M012CI-100V232-1X, L M012CO-100V232-1X, L M012HI-100V232-1X, L M012HO-100V232-1X split-system air conditioner Service Manual

Below you will find brief information for L LM012CI-100V232-1X, L LM012CO-100V232-1X, L LM012HI-100V232-1X, L LM012HO-100V232-1X. These split-system air conditioners provide efficient cooling and heating solutions for your home. They feature multiple operation modes, including cooling, heating, and fan, as well as various control functions, such as timer, sleep, and turbo. The units automatically adjust fan speed and temperature to ensure optimal comfort and energy efficiency.

PDF Download

Document

Service Manual
Models: LM012CI-100V232-1X LM012CO-100V232-1X
LM012HI-100V232-1X/LM012HO-100V232-1X
(Refrigerant:R22)
Thank you for selecting LENNOX air conditioners.
Service Manual
Table of Contents
Part Ⅰ : Technical Information........................................................................1
1. Summary.......................................................................................................................1
2. Specifications...........................................................................................................2
2.1 Specification Sheet............................................................................................................2
2.2 Capacity Curve in Different Outdoor Temperature............................................................4
2.3 Cooling Data Sheet in Rated Frequency..........................................................................4
3. Outline Dimension Diagram.........................................................................5
3.1 Indoor Unit.........................................................................................................................5
3.2 Outdoor Unit......................................................................................................................6
4. Refrigerant System Diagram.......................................................................7
5. Electrical Part...........................................................................................................8
5.1 Wiring Diagram..................................................................................................................8
5.2 PCB Printed Diagram...................................................................................................... 11
6. Function and Control.......................................................................................12
6.1 Remote Controller Introduction.......................................................................................12
6.3 Brief Description of Modes and Functions.......................................................................16
Part Ⅱ : Installation and Maintenance ..................................................21
7. Notes for Installation and Maintenance...........................................21
8. Installation.................................................................................................................23
8.1 Installation Dimension Diagram.......................................................................................23
8.2 Installation Parts-checking .............................................................................................25
8.3 Selection of Installation Location.....................................................................................25
8.4 Electric Connection Requirement....................................................................................25
8.5 Installation of Indoor Unit.................................................................................................25
8.6 Installation of Outdoor Unit..............................................................................................28
8.7 Vacuum Pumping and Leak Detection............................................................................29
8.8 Check after Installation and Test Operation....................................................................29
9. Maintenance.............................................................................................................30
9.1 Error Code.......................................................................................................................30
9.2 Procedure of Troubleshooting.........................................................................................31
9.3 Maintenance Method for Normal Malfunction..................................................................36
Table of Contents
Service Manual
10. Exploded View and Parts List...............................................................38
10.1 Indoor Unit.....................................................................................................................38
10.2 Outdoor Unit..................................................................................................................40
11. Removal Procedure........................................................................................44
11.1 Removal Procedure of Indoor Unit................................................................................44
11.2 Removal Procedure of Outdoor Unit.............................................................................49
Appendix:.........................................................................................................................53
Appendix 1: Reference Sheet of Celsius and Fahrenheit.....................................................53
Appendix 2: Configuration of Connection Pipe......................................................................53
Appendix 3: Pipe Expanding Method....................................................................................54
Appendix 4: List of Resistance for Temperature Sensor.......................................................55
Table of Contents
Service Manual
Part Ⅰ : Technical Information
1. Summary
Indoor Unit:
LM012CI-100V232-1X
LM012HI-100V232-1X
Outdoor Unit:
LM012HO-100V232-1X
LM012CO-100V232-1X
Remote Controller:
Y6185
Technical Information
1
Service Manual
2. Specifications
2.1 Specification Sheet
Model
Product Code
Power
Supply
LM012HI-100V232-1X/
LM012HO-100V232-1X
Y6697/Y6698
Rated Voltage
V~
115
115
Rated Frequency
Hz
60
60
1
1
Indoor
Indoor
3370
3282
Phases
Power Supply Mode
Cooling Capacity
W
Heating Capacity
W
/
3517
Cooling Power Input
W
1190
1180
Heating Power Input
W
/
1050
Cooling Power Current
A
10.35
10.47
Heating Power Current
A
/
9.31
Rated Input
W
1650
1700
Rated Current
A
14.35
16.50
m3/h
550/460/380/300/-
600/470/380/320/-
L/h
1
1
EER
W/W
3
3
COP
W/W
/
3
SEER
W/W
/
/
HSPF
W/W
/
/
16-24
15-22
LM012CI-100V232-1X
LM012HI-100V232-1X
Y6687
Y6697
Air Flow Volume(SH/H/M/L/SL)
Dehumidifying Volume
Application Area
m
2
Model of indoor unit
Indoor Unit Product Code
Fan Type
Cross-flow
Cross-flow
Diameter Length(DXL)
mm
Φ98X580
Φ98X580
Fan Motor Cooling Speed(SH/H/M/L/SL)
r/min
1450/1200/1050/800
1450/1200/1050/800/-
Fan Motor Heating Speed(SH/H/M/L/SL)
r/min
/
1350/1200/1050/900/-
W
20
20
Fan Motor RLA
A
0.17
0.4
Fan Motor Capacitor
μF
4
4
Input of Heater
W
Output of Fan Motor
Evaporator Form
Indoor Unit
/
/
Aluminum Fin-copper Tube
Aluminum Fin-copper Tube
Pipe Diameter
mm
Ф5
Φ5
Row-fin Gap
mm
2-1.4
2-1.4
Coil Length (LXDXW)
mm
584X22.8X266.7
584X22.8X266.7
MP24AA
MP24AA
1.5
1.5
Swing Motor Model
Output of Swing Motor
Fuse
2
LM012CI-100V232-1X/
LM012CO-100V232-1X
Y6687/Y6688
W
A
3.15
3.15
Sound Pressure Level (SH/H/M/L/SL)
dB (A)
42/38/34/29/-
43/38/34/29/-
Sound Power Level (SH/H/M/L/SL)
dB (A)
52/48/44/39/-
53/48/44/39/-
Dimension (WXHXD)
mm
790X200X275
790X200X275
Dimension of Carton Box (LXWXH)
mm
850X264X339
850X339X262
Dimension of Package (LXWXH)
mm
853X267X354
853X342X277
Net Weight
kg
9
9.5
Gross Weight
kg
11
11.5
Technical Information
Service Manual
Model of Outdoor Unit
LM012CO-100V232-1X
Outdoor Unit Product Code
LM012HO-100V232-1X
Y6688
Y6698
ZHUHAI LANDA COMPRESSOR ZHUHAI LANDA COMPRESSOR
CO., LTD.
CO.,LTD
QX-B172xC030
QX-B172xC030
Compressor Manufacturer/Trademark
Compressor Model
Compressor Oil
Compressor Type
ATMOS NM56EP
ATOMS-NM56EP
Rotary
Rotary
L.R.A.
A
47
47
Compressor RLA
A
10.3
10
Compressor Power Input
W
Overload Protector
Throttling Method
1140
1140
InternalUP3-49
UP3-49
Capillary
Capillary
Operation Temp
o
C
16~30
16~30
Ambient Temp (Cooling)
o
C
18~48
18~43
Ambient Temp (Heating)
o
C
/
-7~24
Aluminum Fin-copper Tube
Aluminum Fin-copper Tube
Condenser Form
Pipe Diameter
mm
Ф5
Φ7.94
Rows-fin Gap
mm
1-1.3
1-1.4
Coil Length (LXDXW)
mm
709X11.4X495.3
696X19.05X506
Fan Motor Speed
rpm
850
850
Output of Fan Motor
Outdoor Unit Fan Motor RLA
Fan Motor Capacitor
Air Flow Volume of Outdoor Unit
W
30
30
A
0.34
0.53
μF
7
7
m3/h
1600
1800
Axial-flow
Axial-flow
Fan Type
Fan Diameter
mm
Defrosting Method
Climate Type
Isolation
Moisture Protection
Permissible Excessive Operating Pressure for
MPa
the Discharge Side
Permissible Excessive Operating Pressure for
MPa
the Suction Side
Sound Pressure Level (H/M/L)
dB (A)
Sound Power Level (H/M/L)
Ф394.5
Φ400
/
Automatic Defrosting
T1
T1
I
I
IP24
IP24
3
3.0
1.5
1.5
50/-/-
50/-/-
dB (A)
60/-/-
60/-/-
Dimension (WXHXD)
mm
776X540X320
776X540X320
Dimension of Carton Box (LXWXH)
mm
820X355X580
820X355X580
Dimension of Package (LXWXH)
mm
823X358X595
823X358X595
Net Weight
kg
27
29.5
Gross Weight
kg
29.5
32
R22
R22
Refrigerant
Refrigerant Charge
kg
0.43
0.65
Length
m
5
5
g/m
15
15
Gas Additional Charge
Outer Diameter Liquid Pipe
Connection
Outer Diameter Gas Pipe
Pipe
Max Distance Height
Max Distance Length
mm
Ф6
Φ6
mm
Ф12
Φ12
m
10
10
m
20
20
Note: The connection pipe applies metric diameter.
The above data is subject to change without notice; please refer to the nameplate of the unit.
Technical Information
3
Service Manual
2.2 Capacity Curve in Different Outdoor Temperature
Heating
Cooling
120
110
100
80
90
Capacity Ratio(%)
Capacity ratio(%)
100
80
70
Conditions
Indoor:DB27&ordm;C WB19 &ordm;C
Indoor air flow: Super High
Pipe length: 5m
60
50
60
40
Conditions
Indoor:DB20 &ordm;C
Indoor air flow：Supper High
Pipe length：5m
20
0
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46
-7
-5
Outdoor temp.(&ordm;C)
-3
0
5
10
Outdoor temp.(&ordm;C)
2.3 Cooling Data Sheet in Rated Frequency
Cooling:
Rated cooling condition(&deg;C)
(DB/WB)
Indoor
Outdoor
27/19
35/24
Model
Pressure of gas pipe
connecting indoor and
outdoor unit
P (MPa)
All models
0.4~0.6
Inlet and outlet pipe temperature
of heat exchanger
T1 (&deg;C)
in:8~11
out:11~14
T2 (&deg;C)
in:75~85
out:37~43
Fan speed of
indoor unit
Fan speed
of outdoor
unit
Super High
High
Fan speed of
indoor unit
Fan speed
of outdoor
unit
Super High
High
Heating:
Rated heating condition(&deg;C)
(DB/WB)
Indoor
Outdoor
20/-
7/6
Model
Pressure of gas pipe
connecting indoor and
outdoor unit
P (MPa)
All models
1.5~1.75
Inlet and outlet pipe temperature
of heat exchanger
T1 (&deg;C)
in:75~85
out:37~43
T2 (&deg;C)
in:1~3
out:2~5
Instruction:
T1: Inlet and outlet pipe temperature of evaporator
T2: Inlet and outlet pipe temperature of condenser
P: Pressure at the side of big valve
Connection pipe length: 5 m.
4
Technical Information
Service Manual
3. Outline Dimension Diagram
3.1 Indoor Unit
W
D
H
168.5
103
462
462
159.5
148
Φ55
Φ55
Φ55
Φ55
54
35
150
88
54
35
90
78
Unit:mm
Models
W
H
D
All models
790
275
200
Technical Information
5
Service Manual
3.2 Outdoor Unit
LM012HO-100V232-1X
257
540
714
320
286
776
510
Unit:mm
LM012CO-100V232-1X
714
540
257
320
286
776
510
6
Unit:mm
Technical Information
Service Manual
4. Refrigerant System Diagram
Cooling:
Outdoor unit
Indoor unit
Gas pipe
side
Valve
Discharge
Heat
exchanger
(evaporator)
Suction
Accumlator
Compressor
Heat
exchanger
(condenser)
Liquid pipe
side
Valve
Capillary
Strainer
Cooling and Heating
Outdoor unit
Indoor unit
Gas pipe
side
Valve
4-Way valve
Discharge
Heat
exchanger
(evaporator)
Suction
Accumlator
Compressor
Heat
exchanger
(condenser)
Liquid pipe
side
Valve
Strainer
Capillary
Strainer
COOLING
HEATING
Connection pipe specification:
Liquid pipe:1/4&quot; (6mm)
Gas pipe:1/2&quot; (12mm)
Technical Information
7
Service Manual
5. Electrical Part
5.1 Wiring Diagram
●Instruction
Symbol
Symbol Color
Symbol
Symbol Color
Symbol
Name
WH
White
GN
Green
CAP
Jumper cap
COMP
YE
Yellow
BN
Brown
RD
Red
BU
Blue
YEGN
Yellow/Green
BK
Black
Compressor
Grounding wire
/
/
Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model.
● Indoor Unit
LM012CI-100V232-1X
BU(WH)
TUBE TEMP. ROOM TEMP. RECEIVER AND FAN MOTOR
SENSOR
SENSOR DISPLAY BOARD
M1
AP1 DISPLAY
θ
RT1
RT2
POWER
T-SENSOR
CAP
JUMP
DISP1
AP2
DISP2
PG
K1(K3)
PRINTED CIRCUIT BOARD
SWING-UD
8
L
YEGN(GN)
N1
BU
AC-L
COMP
BK
TR-IN TR-OUT
M2
TC
STEPPING
MOTOR
TRANSFORMER
TERMINAL
BLOCK
PGF
N(1)
2
YEGN
BU
BK
YEGN
OUTDOOR UNIT
θ
N
BN(BK)
CONNECTING
XT CABLE
PE
EVAPORATOR
Technical Information
Service Manual
LM012HI-100V232-1X
&copy;
&copy;
57
57
&amp;$3
-803
&lt;(*1*1
3*
',63 ',63
$3
35,17('&amp;,5&amp;8,7%2$5'
0
67(33,1*
02725
;7
1
%8
1
%8
$&amp;/
..
&amp;203
%.
%.
97
97
75,1 75287
2)$1
/
3(
($57+3/$7(
&lt;(*1
&lt;(*1
3(
(9$325$725
3*)
:$&lt;
6:,1*8'
1
%1%.
0
$3 ',63/$&lt;
76(1625
32:(5
%8:+
)$102725
2*
&amp;11(&amp;7,1*
7(50,1$/
&amp;$%/(
%/2&amp;.
2*
287'22581,7
78%(7(03 52207(03 5(&amp;(,9(5$1'
6(1625
6(1625
',63/$&lt;%2$5'
7&amp;
Ⅱ
75$16)250(5
● Outdoor Unit
LM012CO-100V232-1X
Technical Information
9
Service Manual
LM012HO-100V232-1X
These wiring diagrams are subject to change without notice; please refer to the one supplied with the unit.
10
Technical Information
Service Manual
5.2 PCB Printed Diagram
● Top view
4
3
2
5
6
7
8
9
10
11
12
13
1
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Name
Interface of compressor
Live wire interface of power cord
Neutral wire interface of power cord
Neutral wire interface of cold plasma
Interface of PG motor
Interface of outdoor motor
Interface of 4-way valve
Live wire interface of cold plasma
Interface of up &amp; down swing motor
Interface of PG motor feedback
Interface of left &amp; right swing motor
Jumper cap
Interface of temperature sensor
Interface of display board
● Bottom view
Technical Information
11
Service Manual
6. Function and Control
6.1 Remote Controller Introduction
9
▲ button
3
MODE button
4
SWING button
button
6
FAN button
7
TIMER OFF button
8
CLOCK button
4
9
TIMER ON button
5
6
2
▲
3
ON/OFF button
5
1
2
1
8
7
10 SLEEP button
10
12
11
11 TEMP button
15
13
14
12 TURBO button
13 X-FAN
button
14 I FEEL button
15
Introduction for icons on display screen
I feel
8 heating function
Operation mode
Auto mode
Cool mode
Dry mode
Fan mode
Heat mode
/
button
Set fan speed
Send signal
Turbo mode
ventilation operation
health function
X-fan mode
Set temperature
Clock
Sleep mode
Light
Set time
TIMER ON /
TIMER OFF
Child lock
Up &amp; down swing
Temp. display type
:Set temp.
:Indoor ambient temp.
:Outdoor ambient temp.
Introduction for buttons on remote controller
Note:
● After putting through the power, the air conditioner will give out a sound. Operation indictor &quot; &quot; is ON (red indicator).
After that, you can operate the air conditioner by using remote controller.
● Under on status, pressing the button on the remote controller, the signal icon &quot; &quot; on the display of remote controller
will blink once and the air conditioner will give out a “de” sound, which means the signal has been sent to the air conditioner.
● Under off status, set temperature and clock icon will be displayed on the display of remote controller (If timer on, timer
off and light functions are set, the corre-sponding icons will be displayed on the display of remote controller at the same
time); Under on status, the display will show the corresponding set function icons.
Press this button to turn on the unit. Press this button again to turn off the unit.
Press this button to increase set temperature. Holding it down above 2 seconds rapidly increases set temperature.
In AUTO mode, set temperature is not adjustable.
12
Technical Information
Service Manual
AUTO
COOL
DRY
FAN
HEAT*
OFF
Technical Information
13
Service Manual
battery
reinstall
remove
Cover of battery box
14
Technical Information
Service Manual
Technical Information
15
Service Manual
6.3 Brief Description of Modes and Functions
1. Summary
(1) Buzzer
When the controller is energized or receives signal from button (emergency operation switch on air conditioner) or remote controller, the
buzzer will give out a beep.
(2) Display
◆ After energization, dual-8 nixie tube and power indicator blink once. Under standby status, the power indicator is in red.
After turning on the unit by remote controller, power indicator is off. The dual-8 nixie tube displays current set temperature.
(Note: No operation indicator, heating indicator, cooling indicator and dry indictor for models with B2 or B4 panels. Therefore, no mode
indicator display during operation status. )
Display
Temp.
indicator
Heating
indicator
Cooling
indicator
(3) Temperature parameter
◆ Indoor set temperature (Tpreset)
◆ Indoor ambient temperature (Tamb.)
◆ Inner tube temperature of indoor evaporator (Ttube)
Receiver
window
Power
indicator
drying
indicator
2. Introduction of Basic Mode Function
◆ Once the compressor is energized, there should be a minimum interval of 3 mins between two start-ups.
◆ If the unit is with memory function and is off before power failure, the compressor can be restarted without an interval of 3 mins; if the
◆ unit is on before power failure, the compressor will be restarted with an interval of 3 mins.
Once compressor is started, it won’t stop within 6 mins according to the change of room temp.
(1) Auto mode
① Operation condition and process for auto mode
Under auto mode, the system will automatically select operation mode (cooling, heating, and fan) according to indoor ambient temperature.
There swill be 30s delayed for protection between mode switchover.
◆ When Tamb≥26℃ , unit will be in cooling mode Ex-factory set temperature is 25℃
◆ Cooling and heating unit: When Tamb≤(19℃ +Tcompensation), unit will be in heating mode Tpreset=20℃ .
◆ Cooling only unit: When Tamb≤22℃ , unit will be in fan mode Tpreset=25℃ .
◆ For cooling and heating unit under condition that (19℃ +Tcompensation) ＜ Tamb ＜ 26℃ (For cooling only unit under condition that 22℃
＜ Tamb ＜ 26℃ ), when unit is initially turned on in auto mode, it will operate according to auto fan mode. When unit is changed to auto
mode from other modes, it will maintain its previous working status (If auto mode is turned on from
drying mode, unit will operate according to auto fan mode).
② Protection function is same as that under each mode.
(2) Cooling mode
① Operation condition and process for cooling mode
◆ When Tamb. ≥Tset+1℃ , the system operates under cooling mode. In this case, the compressor, the ODU fan motor and the IDU fan
motor operates at set speed.
◆ When Tamb. ≤Tset-1℃ , the compressor and the ODU fan motor stop, while the IDU fan motor operates at set speed.
◆ When Tset-1℃ &lt;Tamb. &lt;Tset+1℃ , the system will maintain its previous operation status.
In cooling mode, the 4-way valve is de-energized (4-way valve is not available for cooling only unit). Temperature setting range is 16~30℃ .
Start cooling
Tpreset +1 ˚C Tamb.
Original operating status
Tpreset –1 ˚C
Graphic instruction:
(Same as below)
Indicates operation
Indicates stop
16
6 min.
3 min.
6 min.
Stop cooling
Compressor
Outdoor fan motor
Indoor fan motor
Set fan speed
Technical Information
Service Manual
② Protection function
◆ Freeze protection
During operation, when controller detected that Ttube≤0℃ for a consecutive period of time, the system enters into freeze protection. In
that case, the compressor and the ODU fan stop operation, while the IDU operates at set fan speed. If freeze protection is released and
the compressor has been out of operation for 3 mins, the unit will resume its previous operation status.
Freeze protection period
3 min
Compressor
Outdoor fan motor
Set fan speed
Indoor fan motor
◆ Overcurrent protection ( this protection function is not available for those models whose cooling capacity ≤12000Btu/h)
During operation process, if controller detected that system current exceeds the limit value for 3s consecutively (overcurrent), only the
fan operates. About 3 mins later, if overcurrent is released, the system will resume original operation.
If overcurrent protection occurs for 6 times consecutively, and resume operation time won’t exceed 6min every time, overcurrent protection information will be displayed. After turning off the unit, display won’t be displayed.
If turn on the unit again, the system will be restated up again. Overcurrent protection information will be eliminated.
Please refer to maintenance part for display information and disposal method for details.
◆ Locked protection to IDU fan motor
During operation of IDU fan motor, if controller detected that the rotation speed of IDU fan motor less than 300/min or stop rotation, the
motor operates abnormally. In order to prevent damage to motor, controller will protect automatically, the system stops operation and
blocked information of IDU fan motor will be displayed. After turning off the unit, display won’t be displayed.
If turn on the unit again, the system will be restated up again. Blocked information of IDU fan motor will be eliminated. (For some models,
they can only be restated up after re-energized)
Please refer to maintenance part for display information and disposal method for details.
(3) Drying mode
① Operation condition and process for drying mode
◆ When Tamb. &gt;Tset+2℃ , the system starts drying and cooling. In this case, the compressor and the ODU fan motor operate, and the
IDU fan motor operates at low speed.
◆ When Tset-2℃ ≤Tamb. ≤Tset+2℃ , the system will start drying. In this case, the IDU fan motor operates at low speed; the compressor
and the ODU fan motor operate for 6 minutes and stop for 4 minutes in cycle.
◆ When Tamb.&lt;Tset-2℃ , the compressor and the ODU fan motor stop, while the IDU fan motor runs at low speed.
In drying mode, the 4-way valve is de-energized (4-way valve is not available for cooling only unit); Temperature setting range is
16~30℃ . Fan speed can’t be adjusted.
Tamb.
Cooling
Tpreset+2
Drying
Tpreset-2
6 min
4min.
6min.
4min.
Stop
Compressor
Outdoor fan motor
Indoor fan motor
Low speed
② Protection function
◆ Freeze protection
During dying and cooling operation, when the controller detected that Ttube≤0℃ for a period of time consecutively, the system will enter
into freeze protection. In that case, the compressor and the ODU fan motor stops operation, while the IDU fan motor operates at low
speed. When freeze protection is release and the compressor has stopped for 3min, the system will resume original operation.
During drying operation, when the controller detected that Ttube≤0℃ for a period of time consecutively, the system enters into freeze
protection. In that case, the compressor, the ODU fan motor stops operation, while the IDU fan motor operates at low speed. When
freeze protection is release and the compressor has stopped for 4min, the system will resume original operation.
◆ Other protection is same as that under cooling mode.
Technical Information
17
Service Manual
(4) Fan mode
① Operation condition and process for fan mode
In fan mode, the IDU fan motor operates at set speed, while the compressor and the ODU fan motor stop. 4-way valve is de-energized
(4-way valve is not available for cooling only unit). Temperature setting range is 16~30℃ .
② Protection function
In fan mode, there are overcurrent protection and blocked protection of IDU fan motor. Please refer to corresponding protection function
under cooling mode for details.
(5) Heating mode(no heating mode is not available for cooling only unit)
① Operation conditioner and process for heating mode
◆ When Tamb-Tcompensation≤Tpreset-1℃ , unit will operate in heating mode. 4-way valve will be energized while compressor and
outdoor fan starts operation at the same time. Indoor fan will start some time later so that air condition won’t blow out cold air.
◆ When Tamb-Tcompensation≥Tpreset+1℃ , compressor and outdoor fan will stop operation while 4-way valve is still power on. Indoor
fan will continue operation for a while at set fan speed to blow out the residual heat so that temperature within the air conditioner won’t
be too high.
◆ When Tpreset-1℃＜ Tamb-Tcompensation ＜ Tpreset+1℃ , system will maintain its previous working status.
In heating mode, 4-way valve is energized. Temperature setting range is 16~30℃ .
Stop heating
Tpreset+4
Original operating status
Tpreset+2
Tamb.
min.
min.
min.
Start heating
Compressor
Outdoor unit
Intdoor unit
min.
Set fan speed
min.
Set fan speed
Reversing valve
② Defrosting condition and process
For ensusing heating effect, air conditioner will defrost automatically according to defrosting status on outdoor unit. During defrosting,
heating icon will be on and off.
③ Protection function
◆ Overheating prevention protection
During operation, when controller detects that Ttube≥55℃ ,the ODU fan motor stops operation; When Ttube is resumed normally, the
ODU fan motor resumes operation.
◆ Noise silencing protection
When turning off the unit or during mode switchover, the 4-way valve is closed. In order to decrease noise, the 4-way valve will delay
2mins to be closed.
◆ Overcurrent protection ( this protection function is not available for those models whose cooling capacity ≤12000Btu/h)
During operation process, if controller detected that system current exceeds the limit value for 3s consecutively(overcurrent), the
system stops operation. About 3mins later, if overcurrent is released, the system will resume original operation. If overcurrent protection
occurs for 6 times consecutively, and resume operation time won’t exceed 6min every time, overcurrent protection information will be
displayed. After turning off the unit, display won’t be displayed.
If turn on the unit again, the system will be restated up again. Overcurrent protection information will be eliminated.
Please refer to maintenance part for display information and disposal method for details.
◆ Locked protection to IDU fan motor
During operation of IDU fan motor, if controller detected that the rotation speed of IDU fan motor less than 300/min or stop rotation, the
motor operates abnormally. In order to prevent damage to motor, controller will protect automatically, the system stops operation and
blocked information of IDU fan motor will be displayed. After turning off the unit, display won’t be displayed.
If turn on the unit again, the system will be restated up again. Blocked information of IDU fan motor will be eliminated. (For some models, they can only be restated up after re-energized)
Please refer to maintenance part for display information and disposal method for details.
3. Other Control Function Introduction
(1) Timer function
Controller has general timer function and clock timer function. When you select the remote controller with general timer function, only
18
Technical Information
Service Manual
the general timer function of controller can be activated; when you select the remote controller with clock timer, only the clock timer
function of controller can be activated.
① General timer: The precision of general timer is 0.5hour. 24hours circulated timer can’t be set.
◆ Timer ON: Timer ON can be set at unit OFF. If selected ON time is reached, the unit will start to operate according to previous
setting status. Time setting range is 0.5~24hr in 30-minute increments.
◆ Timer OFF: Timer OFF can be set at unit ON. If selected OFF time is reached, the unit will stop. Time setting range is 0.5~24hr in
30-minute increments.
② Clock timer: The precision of clock timer is 1minute. 24hours circulated timer can be set.
◆ Timer ON: If timer ON is set during operation of the unit, the unit will continue to operate. If timer ON is set at unit OFF, upon ON
time reaches, the unit will start to run according to previous setting status.
◆ Timer OFF: If timer OFF is set at unit OFF, the system will keep standby status. If timer OFF is set at unit ON, upon OFF time
reaches, the unit will stop operation.
◆ Timer change:
Although timer has been set, the unit still can be turned on/off by pressing ON/OFF button on the remote controller. You can also reset
the timer.
If timer ON and timer OFF are set at the same time during operation of the unit, the unit will keep running at current status till OFF
time reaches. Upon ON time reached, the system will be turned on automatically. The unit will operate circularly like that every
24hours.
If timer ON and timer OFF are set at unit OFF status, the system keep OFF status till ON time reaches. Upon OFF time reaches, the
system will be turned OFF automatically. The unit will operate circularly like that every 24hours.
(2) Emergency operation switch
After pressing this button, the system will operate according under auto mode and the IDU fan motor operates at auto speed. Swing
motor operates when the IDU fan motor operates. Press this button again to turn off the unit.
Emergency
operation switch
OFF status Press
ON status(Auto mode)
Press
(3) Sleep function
In this mode, the system will select proper sleep curve to operate according to different set temperature.
① If start up sleep function under cooling or drying mode, the system will increase set temperature automatically within a certain
range to operate.
② If start up sleep function under heating mode, the system will decrease set temperature automatically within a certain range to
operate.
(4) Turbo function
Turbo function can be set under cooling and heating modes. During operation of turbo function, the system operates at the maximum
fan speed.
(5) Dry function
Dry function can be set under cooling and drying modes. During operation of drying function, the fan will stop operation after operating
for a period of time when turning off the unit.
(6) Auto fan speed control
Auto fan speed control can be set under cooling, heating and fan mode. During operation of auto fan speed control, the IDU fan motor
will adjust the fan speed (high, medium or low speed) according to ambient temperature.
(7) Up&amp;down swing control
① After energization, up &amp; down swing motor will firstly have the horizontal louver rotate anticlockwise to position O to close air outlet.
If swing function has not been set after start-up of the unit, horizontal louver will turn clockwise to position D in heating mode, or turn
clockwise to level position L in other modes.
② If swing function is set when turning on the unit, the horizontal louver will swing between L and D.
Horizontal louver has 7 swing statuses:
◆ Stay at position L: control by remote controller:
◆ Stay at position A: control by remote controller:
◆ Stay at position B: control by remote controller:
◆ Stay at position C: control by remote controller:
◆ Stay at position D: control by remote controller:
, , ,
◆ Swing between L and D: control by remote controller:
◆ Stop at any postion between L and D (angles between L and D are equiangular) and no display
on remote controller.
③ When turning off the unit, horizontal louver will close at position O.
④ Swing action is valid only when set swing command and the IDU fan motor is operating.
Technical Information
O(0&deg;)
19
Service Manual
(8) Dual-8 nixie tube display
◆ When the air conditioner is turned on for the first time, dual-8 nixie tube defaulted to display current set temperature.
◆ When controller receives signal of display set temperature, dual-8 nixie tube displays set temperature. When received remote control
signal is switched to indoor ambient temperature display status signal from other display status, dual-8 nixie tube will display indoor
ambient temperature for 3-5s, and then turn back to display set temperature. If remote control to set other status, the display keeps the
same.
◆ When air conditioner has a malfunction,dual-8 nixie tube will show relevant error code.
F1
F2
H6
C5
U8
E8
Indoor ambient temperature sensor is open/
short-circuited
Indoor evaporator temperature sensor is
open/short-circuited
Blocked protection of IDU fan motor
Malfunction protection of jumper cap
Zero-crossing inspection circuit malfunction
of the IDU fan motor
Overload protection
◆ When air conditioner is in auto defrosting, heating icon will be on and off.
◆ If turn off light button, all display will be turned off.
(9) Memory function
① Power failure when turning on the unit
◆ Memory content: ON status, mode, up&amp;down swing, light, set temperature, set fan speed, general timer, Fahrenheit/ Celsius
◆ General timer can be memorized. Time of timer is calculated again from energization.
◆ Clock timer can’t be memorized.
② Power failure when turning off the unit
◆ Memory content: OFF status, mode, up&amp;down swing, light, set temperature, set fan speed, general timer, Fahrenheit/ Celsius
◆ General timer can be memorized. Time of timer is calculated again from energization.
◆ Clock timer can’t be memorized.
4. Special Function
(1) Health function (for the model with health function)
During operation of the IDU fan motor, press health button on the remote controller to start health function (If there is not health button on
the remote controller, the unit defaults health function ON).
(2) I Feel function (for all models, but it needs the remote controller which can set this function)
When I FEEL command is received, the controller will operate according to the ambient temperature sent by the remote controller (For
defrosting and cold air prevention, the unit operates according to the ambient temperature sensed by the air conditioner). The remote
controller will regularly send ambient temperature data to the controller. When the data has not been received for a long time, the unit
will operate according to the temperature sensed by the air conditioner. If I FEEL function is not set, the ambient temperature will be that
sensed by the air conditioner.
20
Installation and Maintenance
Service Manual
Part Ⅱ : Installation and Maintenance
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 qualified 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.
Warnings
Electrical Safety Precautions:
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 firmly
during installation and maintenance.
5. Have the unit adequately grounded. The grounding
wire can’t 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 can’t be
pressed by hard objects.
9. If power cord or connection wire is broken, it must be
replaced by a qualified person.
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 specification
if it is burnt down; don’t 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.
Installation Safety Precautions:
1. Select the installation location according to the requirement 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 sufficient fixing bolt must be installed; make sure the installation
support is firm.
4. Ware safety belt if the height of working is above 2m.
5. Use equipped components or appointed components during installation.
6. Make sure no foreign objects are left in the unit after finishing installation.
Refrigerant Safety Precautions:
1. Avoid contact between refrigerant and fire as it generates
poisonous gas; Prohibit prolong the connection pipe by
welding.
2. Apply specified 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 sufficient
measure to minimize the density of refrigerant.
5. Never touch the refrigerant piping or compressor without
wearing glove to avoid scald or frostbite.
Improper installation may lead to fire hazard, explosion,
electric shock or injury.
21
Service Manual
Main Tools for Installation and Maintenance
1. Level meter, measuring tape
2. Screw driver
3. Impact drill, drill head, electric drill
22
4. Electroprobe
5. Universal meter
6. Torque wrench, open-end wrench, inner
hexagon spanner
7. Electronic leakage detector
8. Vacuum pump
9. Pressure meter
10. Pipe pliers, pipe cutter
11. Pipe expander, pipe bender
12. Soldering appliance, refrigerant container
Installation and Maintenance
Service Manual
8. Installation
At least 15cm
Space to the ceiling
8.1 Installation Dimension Diagram
Space to the wall
At least 15cm
At least 15cm
Space to the wall
n
tio
uc
tr
bs
Space to the obstruction
o
At least 250cm
he
ot
t
ce
a
Sp
le
At least 50cm
At
m
0c
30
t
as
the
to n
e
ac ctio
Sp stru
st
ob
lea
t
A cm
30
Drainage pipe
At least 30cm
Space to th
e wall
e
ac
Sp
Installation and Maintenance
he
t
to
o
n
tio
uc
tr
bs
t
as
le
At
cm
0
20
At least 50cm
Space to the ob
struction
23
Service Manual
Installation procedures
Start installation
Preparation before installation
Read the requirements
for electric connection
select installation
location
Select indoor unit
installation location
Prepare tools
Select outdoor unit
installation location
Install the support of outdoor unit
(select it according to the actual situation)
Install wall-mounting
frame, drill wall holes
Connect pipes of indoor
unit and drainage pipe
Fix outdoor unit
Connect wires of indoor unit
Install drainage joint of outdoor unit
(only for cooling and heating unit)
Bind up pipes and
hang the indoor unit
Make the bound pipes pass
through the wall hole and then
connect outdoor unit
Connect pipes of outdoor unit
Connect wires of outdoor unit
Neaten the pipes
Vacuum pumping and leakage detection
Check after installation and test operation
Finish installation
Note: this flow is only for reference; please find the more detailed installation steps in this section.
24
Installation and Maintenance
Service Manual
8.2 Installation Parts-checking
No.
1
2
Name
Indoor unit
Outdoor unit
No.
8
9
3
Connection pipe
10
4
Drainage pipe
Wall-mounting
frame
Connecting
cable(power cord)
Wall pipe
11
5
6
7
12
13
Name
Sealing gum
Wrapping tape
Support of outdoor
unit
Fixing screw
Drainage plug(cooling
and heating unit)
Owner’s manual,
remote controller
Note:
1. Please contact the local agent for installation.
2. Don't use unqualified power cord.
8.3 Selection of Installation Location
1. Basic Requirement:
Installing the unit in the following places may cause
malfunction. If it is unavoidable, please consult the local dealer:
(1) The place with strong heat sources, vapors, flammable or
explosive gas, or volatile objects spread in the air.
(2) The place with high-frequency devices (such as welding
machine, medical equipment).
(3) The place near coast area.
(4) The place with oil or fumes in the air.
(5) The place with sulfureted gas.
(6) Other places with special circumstances.
(7) The appliance shall nost be installed in the laundry.
2. Indoor Unit:
(1) There should be no obstruction near air inlet and air outlet.
(2) Select a location where the condensation water can be
dispersed easily andwon't affect other people.
(3) Select a location which is convenient to connect the
outdoor unit and near the power socket.
(4) Select a location which is out of reach for children.
(5) The location should be able to withstand the weight of
indoor unit and won't increase noise and vibration.
(6) The appliance must be installed 2.5m above floor.
(7) Don't install the indoor unit right above the electric
appliance.
(8) Please try your best to keep way from fluorescent lamp.
3. Outdoor Unit:
(1) Select a location where the noise and outflow air emitted by
the outdoor unit will not affect neighborhood.
(2) The location should be well ventilated and dry, in which the
outdoor unit won't be exposed directly to sunlight or strong
wind.
(3) The location should be able to withstand the weight of
outdoor unit.
(4) Make sure that the installation follows the requirement of
installation dimension diagram.
(5) Select a location which is out of reach for children and far
away from animals or plants.If it is unavoidable, please add
fence for safety purpose.
Installation and Maintenance
8.4 Electric Connection Requirement
1. Safety Precaution
(1) Must follow the electric safety regulations when installing
the unit.
(2) According to the local safety regulations, use qualified
power supply circuit and air switch.
(3) Make sure the power supply matches with the requirement
of air conditioner. Unstable power supply or incorrect wiring
may result in electric shock,fire hazard or malfunction. Please
install proper power supply cables before using the air
conditioner.
Air-conditioner
All models
Air switch capacity
25A
(4) Properly connect the live wire, neutral wire and grounding
wire of power socket.
(5) Be sure to cut off the power supply before proceeding any
work related to electricity and safety.
(6) Do not put through the power before finishing installation.
(7) For appliances with type Y attachment,the instructions
shall contain the substance of thefollowing.If the supply cord is
damaged,it must be replaced by the manufacturer,its service
agent or similarly qualified persons in order to avoid a hazard.
(8) The temperature of refrigerant circuit will be high, please
keep the interconnection cable away from the copper tube.
(9) The appliance shall be installed in accordance with national
wiring regulations.
2. Grounding Requirement:
(1) The air conditioner is first class electric appliance. It must
be properly grounding with specialized grounding device
by a professional. Please make sure it is always grounded
effectively, otherwise it may cause electric shock.
(2) The yellow-green wire in air conditioner is grounding wire,
which can't be used for other purposes.
(3) The grounding resistance should comply with national
electric safety regulations.
(4) The appliance must be positioned so that the plug is
accessible.
(5) An all-pole disconnection switch having a contact separation
of at least 3mm in all poles should be connected in fixed wiring.
(6) Including an air switch with suitable capacity, please note
the following table. Air switch should be included magnet
buckle and heating buckle function, it can protect the circuitshort and overload. (Caution: please do not use the fuse only
for protect the circuit)
8.5 Installation of Indoor Unit
1. Choosing Installation Iocation
Recommend the installation location to the client and then
confirm it with the client.
2. Install Wall-mounting Frame
(1) Hang the wall-mounting frame on the wall; adjust it in
horizontal position with the level meter and then point out the
screw fixing holes on the wall.
(2) Drill the screw fixing holes on the wall with impact drill (the
specification of drill head should be the same as the plastic
expansion particle) and then fill the plastic expansion particles
25
Service Manual
in the holes.
(3) Fix the wall-mounting frame on the wall with tapping screws
(ST4.2X25TA) and then check if the frame is firmly installed by
pulling the frame. If the plastic expansion particle is loose,
please drill another fixing hole nearby.
3. Install Wall-mounting Frame
(1) Choose the position of piping hole according to the direction
of outlet pipe. The position of piping hole should be a little
lower than the wall-mounted frame.(As show in Fig.1)
Wall
Space
to the
wall
above
150mm
Level meter
Mark in the middle of it
5. Connect the Pipe of Indoor Unit
(1) Aim the pipe joint at the corresponding bellmouth.(As show
in Fig.5)
(2) Pretightening the union nut with hand.
(3) Adjust the torque force by referring to the following sheet.
Place the open-end wrench on the pipe joint and place the
torque wrench on the union nut. Tighten the union nut with
torque wrench.(As show in Fig.6)
(4) Wrap the indoor pipe and joint of connection pipe with
insulating pipe, and then wrap it with tape.(As show in Fig.7)
Open-end
wrench
Wall
Space
to the
wall
above
150mm
Union nut
Pipe joint
Union nut
Pipe
Fig.5
Pipe
Torque wrench
Fig.6
Indoor pipe
Right
Φ55mm
Rear piping hole
Left
Φ55mm
Rear piping hole
Fig.1
Insulating pipe
(2) Open a piping hole with the diameter of Φ55mm on the
selected outlet pipe position.In order to drain smoothly, slant
the piping hole on the wall slightly downward to the outdoor
side with the gradient of 5-10&deg;.(As show in Fig.2)
Indoor
Refer to the following table for wrench moment of force:
Hex nut diameter(mm)
Φ6
Φ9.52
Φ12
Φ16
Φ19
Outdoor
Φ55mm
5-10&deg;
Fig.2
Note:
(1) Pay attention to dust prevention and take relevant safety
measures when opening the hole.
(2) The plastic expansion particles are not provided and should
be bought locally.
Tightening torque(N.m)
15~20
30~40
45~55
60~65
70~75
6. Install Drain Hose
(1) Connect the drain hose to the outlet pipe of indoor unit.(As
show in Fig.8)
(2) Bind the joint with tape.(As show in Fig.9)
Fig.8
Outlet pipe
4. Outlet pipe
(1) The pipe can be led out in the direction of right, rear right,
left or rear left.(As show in Fig.3)
(2) When selecting leading out the pipe from left or right, please
cut off the corresponding hole on the bottom case.(As show in
Fig.4)
Left
Right
Rear left
Fig.3
Fig.7
Outlet
pipe
Drain hose
Drain hose
Tape
Fig.9
Note:
(1) Add insulating pipe in the indoor drain hose in order to
prevent condensation.
(2) The plastic expansion particles are not provided.
(As show in Fig.10)
Rear right
Drain hose
Left
Right
Cut off
the hole
26
Fig.4
Insulating pipe
Fig.10
Installation and Maintenance
Service Manual
7. Connect Wire of Indoor Unit
8. Bind up Pipe
(1) Open the panel, remove the screw on the wiring cover and
then take down the cover.(As show in Fig.11)
(1) Bind up the connection pipe, power cord and drain hose
with the band.(As show in Fig.14)
(2) Reserve a certain length of drain hose and power cord
for installation when binding them. When binding to a certain
degree, separate the indoor power and then separate the drain
hose.(As show in Fig.15)
(3) Bind them evenly.
(4) The liquid pipe and gas pipe should be bound separately at
the end.
Screw
Panel
Fig.11
Wiring cover
(2) Make the power connection wire go through the cable-cross
hole at the back of indoor unit and then pull it out from the front
side.(As show in Fig.12)
Indoor unit
Gas
pipe
Indoor and
outdoor power cord
Cable-cross
hole
Fig.14
Power connection
wire
Liquid
pipe
Band
Drain hose
Fig.12
(3) Remove the wire clip; connect the power connection wire
and signal control wire to the wiring terminal according to the
color; tighten the screw and then fix them with wire clip.(As
show in Fig.13)
Cooling unit
Cooling and heating unit
N(1) 2
N(1) 2
blue black
yellowgreen
yellowgreen
Outdoor unit connection
4
5
blue black violet orange
Outdoor unit connection
wiring board
grounding
wire
N(1) 2
Connection pipe
Drain hose
Band
Fig.15
Indoor power cord
Note:
(1) The power cord and control wire can't be crossed or
winding.
(2) The drain hose should be bound at the bottom.
4 5
9. Hang the Indoor Unit
Fig.13
wire clip
Note: The wiring board is for reference only,please refer to the
actual one.
(4) Put wiring cover back and then tighten the screw.
(5) Close the panel.
Note:
(1) All wires of indoor unit and outdoor unit should be
connected by a professional.
(2) If the length of power connection wire is insufficient, please
contact the supplier for a new one. Avoid extending the wire by
yourself.
(3) For the air conditioner with plug, the plug should be
reachable after finishing installation.
(4) For the air conditioner without plug, an air switch must be
installed in the line. The air switch should be all-pole parting
and the contact parting distance should be more than 3mm.
Installation and Maintenance
(1) Put the bound pipes in the wall pipe and then make them
pass through the wall hole.
(2) Hang the indoor unit on the wall-mounting frame.
(3) Stuff the gap between pipes and wall hole with sealing gum.
(4) Fix the wall pipe.(As show in Fig.16)
(5) Check if the indoor unit is installed firmly and closed to the
wall.(As show in Fig.17)
Indoor
Wall pipe
Fig.16
Outdoor
Sealing gum
Fig.17
Upper hook
Lower hook of
wall-mounting frame
Note:
Do not bend the drain hose too excessively in order to prevent
blocking.
27
Service Manual
8.6 Installation of Outdoor Unit
1. Fix the Support of Outdoor Unit(Select it according to
the actual installation situation)
(3) Pretightening the union nut with hand.
(4) Tighten the union nut with torque wrench .
Refer to the following table for wrench moment of force:
Note:
(1) Take sufficient protective measures when installing the
outdoor unit.
(2) Make sure the support can withstand at least four times the
unit weight.
(3) The outdoor unit should be installed at least 3cm above the
floor in order to install drain joint.(As show in Fig.18)
(4) For the unit with cooling capacity of 2300W~5000W, 6
expansion screws are needed; for the unit with cooling capacity
of 6000W~8000W, 8 expansion screws are needed; for the
unit with cooling capacity of 10000W~16000W, 10 expansion
screws are needed.
Tightening torque(N.m)
15~20
30~40
45~55
60~65
70~75
Hex nut diameter(mm)
Φ6
Φ9.52
Φ12
Φ16
Φ19
(1) Select installation location according to the house structure.
(2) Fix the support of outdoor unit on the selected location with
expansion screws.
5. Connect Outdoor Electric Wire
(1) Remove the wire clip; connect the power connection wire
and signal control wire to the wiring terminal according to the
color; fix them with screws.(As show in Fig.23)
Cooling unit
Cooling and heating unit
N(1) 2
N(1) 2
yellowgreen
blue black
(brown)
yellowgreen
Indoor unit connection
Indoor unit connection
Wiring board
N(1) 2
Drain hose
At least 3cm above the floor
Chassis
Outdoor drain joint
Fig.23
4 5
Wire clip
Handle
Fig.19
Fig.18
5
blue black violet orange
Grounding
wire
Drain vent
4
2. Install Drain Joint(Only for cooling and heating unit)
(1) Connect the outdoor drain joint into the hole on the chassis.
(2) Connect the drain hose into the drain vent.
(As show in Fig.19)
3. Fix Outdoor Unit
(1) Place the outdoor unit on the support.
(2) Fix the foot holes of outdoor unit with bolts. (As show in
Fig.20)
Note: the wiring board is for reference only,please refer to the
actual one.
(2) Fix the power connection wire and signal control wire with
wire clip.
Note:
(1) After tightening the screw, pull the power cord slightly to
check if it is firm.
(2) Never cut the power connection wire to prolong or shorten
the distance.
Foot holes
Screw
Foot holes
Fig.20
Fig.21
Handle
4. Connect Indoor and Outdoor Pipes
(1) Remove the screw on the right handle of outdoor unit and
then remove the handle.(As show in Fig.21)
(2) Remove the screw cap of valve and aim the pipe joint at the
bellmouth of pipe.(As show in Fig.22)
6. Neaten the Pipes
(1) The pipes should be placed along the wall, bent reasonably
and hidden possibly. Min. semidiameter of bending the pipe is
10cm.
(2) If the outdoor unit is higher than the wall hole, you must set
a U-shaped curve in the pipe before pipe goes into the room,
in order to prevent rain from getting into the room.(As show in
Fig.24)
The drain hos
can't raise
upwards
Wall
Liquid pipe
Liquid
valve
gas pipe
gas valve
Fig.22
28
Pipe joint
Union nut
Fig.24
U-shaped curve
Fig.25
Drain hose
Installation and Maintenance
Service Manual
Note:
(1) The through-wall height of drain hose shouldn't be higher
than the outlet pipe hole of indoor unit.(As show in Fig.25)
(2) Slant the drain hose slightly downwards. The drain hose
can't be curved, raised and fluctuant, etc.(As show in Fig.26)
(3) The water outlet can't be placed in water in order to drain
smoothly.(As show in Fig.27)
2. Leakage Detection
(1) With leakage detector:
Check if there is leakage with leakage detector.
(2) With soap water:
If leakage detector is not available, please use soap water for
leakage detection. Apply soap water at the suspected position
and keep the soap water for more than 3min. If there are air
bubbles coming out of this position, there's a leakage.
8.8 Check after Installation and Test
Operation
1. Check after Installation
Check according to the following requirement after finishing
installation.
The drain hose can't be fluctuant
The drain hose
can't be fluctuant
The water
outlet can't be
fluctuant
The water outlet
can't be placed
in water
No.
Fig.27
1
2
Fig.26
3
8.7 Vacuum Pumping and Leak
Detection
4
1. Use Vacuum Pump
(1) Remove the valve caps on the liquid valve and gas valve
and the nut of refrigerant charging vent.
(2) Connect the charging hose of piezometer to the refrigerant
charging vent of gas valve and then connect the other charging
hose to the vacuum pump.
(3) Open the piezometer completely and operate for 10-15min
to check if the pressure of piezometer remains in -0.1MPa.
(4) Close the vacuum pump and maintain this status for 1-2min
to check if the pressure of piezometer remains in -0.1MPa. If
the pressure decreases, there may be leakage.
(5) Remove the piezometer, open the valve core of liquid valve
and gas valve completely with inner hexagon spanner.
(6) Tighten the screw caps of valves and refrigerant charging
vent.(As show in Fig.28)
Liquid valve
Piezometer
Lo
Hi
Gas valve
Refrigerant charging
vent
Valve cap
Nut of refrigerant
Charging vent
Vacuum pump
Inner hexagon
spanner
Close
Open
Items to be checked
Has the unit been
installed firmly?
Have you done the
refrigerant leakage test?
Is heat insulation of
pipeline sufficient?
Is water drained well?
Is the voltage of power
supply according to the
5
voltage marked on the
nameplate?
Is electric wiring and
6 pipeline installed
correctly?
Is the unit grounded
7
securely?
Does the power cord
8
follow the specification?
Is there any obstruction
9
in air inlet and air outlet?
The dust and
sundries caused
10
during installation are
removed?
The gas valve and liquid
11 valve of connection pipe
are open completely?
Possible malfunction
The unit may drop, shake or
emit noise.
It may cause insufficient cooling
(heating) capacity.
It may cause condensation and
water dripping.
It may cause condensation and
water dripping.
It may cause malfunction or
damage the parts.
It may cause malfunction or
damage the parts.
It may cause electric leakage.
It may cause malfunction or
damage the parts.
It may cause insufficient cooling
(heating).
It may cause malfunction or
damaging the parts.
It may cause insufficient cooling
(heating) capacity.
2. Test Operation
(1) Preparation of test operation
● The client approves the air conditioner installation.
● Specify the important notes for air conditioner to the client.
(2) Method of test operation
● Put through the power, press ON/OFF button on the remote
controller to start operation.
● Press MODE button to select AUTO, COOL, DRY, FAN and
HEAT to check whether the operation is normal or not.
● If the ambient temperature is lower than 16℃ , the air
conditioner can’t start cooling.
Fig.28
Installation and Maintenance
29
Service Manual
9. Maintenance
9.1 Error Code
No.
Malfunction
Name
Display Method
Possible Causes(For specific maintenance method,
of Indoor Unit
A/C Status
(Error Code)
The unit will stop operation as it
reaches the temperature point.
Indoor ambient
1
temperature
sensor is open/
During cooling and drying operation,
F1
except IDU fan motor operates,
other loads stop operation; During
short-circuited
heating operation, the system stops
operation.
2
please refer to the following procedure of
troubleshooting)
1.The wiring terminal between indoor ambient temperature
sensor and main board is loosened or poorly contacted;
2.There’s short circuit due to trip-over of the parts on
controller;
3.Indoor ambient temperature sensor is damaged (Please
check it by referring to the resistance table for temperature
sensor)
4. Main board is broken.
1.The wiring terminal between indoor evaporator
The unit will stop operation as it
temperature sensor and main board is loosened or poorly
Indoor
reaches the temperature point.
contacted;
evaporator
During cooling and drying
2.There’s short circuit due to the trip-over of the parts on
temperature
F2
operation, except IDU fan operates, controller;
sensor is open/
other loads stop operation; During 3.Indoor evaporator temperature sensor is damaged
short-circuited
heating operation, the complete
(Please check it by referring to the resistance table for
unit stops operation.
temperature sensor)
4. Main board is broken.
1.The feedback terminal of PG motor is not connected
IDU fan, ODU fan, compressor and
Blocked
3
protection of
H6
IDU fan motor
protection of
Horizontal louver stops at the
current position.
Malfunction
4
electric heat tube stop operation.
Operation of remote controller or
C5
jumper cap
control panel is available, but the
unit won’t act.
tightly.
2.The control terminal of PG motor is not connected
tightly.
3.Fan blade rotates unsmoothly.
4.Malfunction of motor
5.Main board is broken.
1.There’s not jumper cap on the main board.
2.Jumper cap is not inserted properly and tightly.
3.Jumper cap is damaged.
4.Controller is damaged.
1.Indoor and outdoor heat exchanger is too dirty?
Or air inlet/outlet is blocked?
2.Fan motor is not working. Abnormal fan speed; fan
5
Overload
malfunction
speed is too low or the fan doesn't run.
E8
The entire unit stops.
3.Compressor operates normally or not? Is there any
abnormal noise or oil leak? Casing is too hot?
4.System is blocked inside? (Dirt blockage? Ice blockage?
Oil blockage? Y-valve is not fully open?)
5.Main board temperature sensor detects wrongly.
Zero-crossing
1.Quick de-energization and energization. Wrong
inspection
6
circuit
malfunction
of the IDU fan
motor
30
U8
Operation of remote controller or
judgement by the controller because the electric-
control panel is available, but the
discharging of capacitor is slow.
unit won’t act.
2.Zero-crossing inspection circuit of main board for
controller is abnormal.
Installation and Maintenance
Service Manual
9.2 Procedure of Troubleshooting
1. Malfunction of Temperature Sensor F1, F2
Main detection points:
● Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted?
● Is there short circuit due to trip-over of the parts?
● Is the temperature sensor broken?
● Is mainboard broken?
Malfunction diagnosis process:
Start
Is the wiring terminal between the
temperature sensor and the controller
loosened or poorly contacted?
Yes
Insert the temperature
sensor tightly
No
No
Is there short circuit due to tripover of the parts
Is malfunction
eliminated
Yes
Make the parts upright
No
No
Is the temperature sensor normal
according to the resistance table?
Is malfunction
eliminated
No
Yes
Yes
Replace it with a
temperature sensor with
the same model
Yes
No
Is malfunction
eliminated
Replace the mainboard with
the same model.
Yes
End
Installation and Maintenance
31
Service Manual
2. Malfunction of Blocked Protection of IDU Fan Motor H6
Main detection points:
● SmoothlyIs the control terminal of PG motor connected tightly?
● SmoothlyIs the feedback interface of PG motor connected tightly?
● The fan motor can't operate?
● The motor is broken?
● Detectioncircuit of the mainboard is defined abnormal?
Malfunction diagnosis process:
Start
While power is off stir the blade
No
with a tool to see whether the
blade rotates smoothly
Tighten the screw; reassemble the blade, motor
and shaft bearing rubber base sub-assy to make
sure there is no foreign object between them
Yes
No
Is malfunction
eliminated
Check if the connection of PG
motor feedback terminal is firm
Yes
No
Insert the control terminal
of PG motor tightly
Yes
No
Check if the connection of PG
motor control terminal is firm
Is malfunction
eliminated
Yes
No
Reinstall the blade
and motor correctly
Yes
No
Turn on the unit again; measure
whether the output voltage on
control terminal for PG motor is
more than 50V within 1 min after
the louvers are opened
Yes
Is malfunction
eliminated
Yes
Yes
Yes
Is the motor started up
No
Measure the voltage of this foot to
neutral wire on the mainboard
Replace PG motor
No
No
Is malfunction
eliminated
Yes
Replace the mainboard
with the same model
End
32
Installation and Maintenance
Service Manual
3. Malfunction of Protection of Jumper Cap C5
Main detection points:
● Is there jumper cap on the mainboard?
● Is the jumper cap inserted correctly and tightly?
● The jumper is broken?
● The motor is broken?
● Detection circuit of the mainboard is defined abnormal?
Malfunction diagnosis process:
Start
No
Is there jumper cap on the mainboard?
Appearance of the
jumper cap
Assemble the jumper
cap with the same model
Yes
No
Is the jumper cap inserted correctly
and tightly?
Is malfunction
eliminated
No
Insert the jumper
cap tightly
Yes
No
Is malfunction
eliminated
Yes
Replace the jumper cap with
the same model
Is malfunction
eliminated
Yes
Yes
No
Replace the mainboard
with the same model
End
Installation and Maintenance
33
Service Manual
4. High temperature and overload protection (AP1 below means control board of outdoor unit) E8
Main detection points:
● If the outdoor ambient temperature is in normal range;
● If the indoor and outdoor fan are running normally;
● If the radiating environment of indoor and outdoor unit is good.
Malfunction diagnosis process:
Start
If the outdoor ambient temperature is
higher than 53&deg;C?
No
If the airflow of indoor and outdoor unit
is good?
No
If the indoor and outdoor fan are
running normally?
Yes
Normal protection, please use it
after improving the outdoor ambient
temperature
Unit restarts
normally
Yes
Unit restarts
normally
Yes
No
Improve the radiating environment of
unit (clean the heat exchanger and
remove surrounding obstacles)
No
Connect normally?
Yes
Adjust the
connection
Yes
Replace fan
capacitor
Yes
Replace motor
Yes
Yes
Fan capacitor is broken?
Replace outdoor
mainboard
No
Motor is broken?
No
Replace mainboard
End
34
Installation and Maintenance
Service Manual
5. Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor U8
Main detection points:
● Instant energization afte de-energization while the capacitordischarges slowly?
● The zero-cross detectioncircuit of the mainboard is defined abnormal?
Malfunction diagnosis process:
Start
Turn power off for
1minute,the turn
back on
U8 is still
displayed
No
The unit returns to normal.
Conclusion:U8 is displayed due to
power off/on while the
capacitor discharges slowly.
Yes
The zero-cross detection circuit
of the mainboard is defined
abnormal.Replace the mainboard
with the same model
End
Installation and Maintenance
35
Service Manual
9.3 Maintenance Method for Normal Malfunction
1. Air Conditioner Can't be Started Up
Possible Causes
No power supply, or poor
connection for power plug
Discriminating Method (Air conditioner Status)
Troubleshooting
Confirm whether it's due to power failure. If yes,
After energization, operation indicator isn’t bright wait for power recovery. If not, check power
and the buzzer can't give out sound
supply circuit and make sure the power plug is
connected well.
Wrong wire connection between
indoor unit and outdoor unit,
Under normal power supply circumstances,
or poor connection for wiring
operation indicator isn't bright after energization
terminals
Check the circuit according to circuit diagram
and connect wires correctly. Make sure all
wiring terminals are connected firmly
Make sure the air conditioner is grounded
reliably
Make sure wires of air conditioner is connected
After energization, room circuit breaker trips off at
Electric leakage for air conditioner
correctly
once
Check the wiring inside air conditioner. Check
whether the insulation layer of power cord is
damaged; if yes, place the power cord.
Model selection for air switch is
After energization, air switch trips off
Select proper air switch
improper
After energization, operation indicator is bright,
Replace batteries for remote controller
Malfunction of remote controller while no display on remote controller or buttons
Repair or replace remote controller
have no action.
2. Poor Cooling (Heating) for Air Conditioner
Possible Causes
Set temperature is improper
Rotation speed of the IDU fan
motor is set too low
Filter of indoor unit is blocked
Discriminating Method (Air conditioner Status)
Troubleshooting
Observe the set temperature on remote controller Adjust the set temperature
Small wind blow
Set the fan speed at high or medium
Check the filter to see it's blocked
Clean the filter
Check whether the installation postion is proper
Installation position for indoor unit
Adjust the installation position, and install the
according to installation requirement for air
and outdoor unit is improper
rainproof and sunproof for outdoor unit
conditioner
Discharged air temperature during cooling is
higher than normal discharged wind temperature;
Discharged air temperature during heating is
Find out the leakage causes and deal with it.
Refrigerant is leaking
lower than normal discharged wind temperature; Add refrigerant.
Unit's pressure is much lower than regulated
range
Malfunction of 4-way valve
Blow cold wind during heating
Replace the 4-way valve
Discharged air temperature during cooling is
higher than normal discharged wind temperature;
Discharged air temperature during heating is
Malfunction of capillary
lower than normal discharged wind temperature; Replace the capillary
Unit't pressure is much lower than regulated
range. If refrigerant isn’t leaking, part of capillary
is blocked
Flow volume of valve is
The pressure of valves is much lower than that
Open the valve completely
insufficient
stated in the specification
Refer to point 3 of maintenance method for
Malfunction of horizontal louver Horizontal louver can’t swing
details
Refer to troubleshooting for H6 for maintenance
Malfunction of the IDU fan motor The IDU fan motor can’t operate
method in details
Refer to point 4 of maintenance method for
Malfunction of the ODU fan motor The ODU fan motor can't operate
details
Refer to point 5 of maintenance method for
Malfunction of compressor
Compressor can't operate
details
3. Horizontal Louver Can't Swing
Possible Causes
Wrong wire connection, or poor
connection
Check the wiring status according to circuit
diagram
Stepping motor is damaged
Stepping motor can't operate
Others are all normal, while horizontal louver
can't operate
Main board is damaged
36
Discriminating Method (Air conditioner Status)
Troubleshooting
Connect wires according to wiring diagram to
make sure all wiring terminals are connected
firmly
Repair or replace stepping motor
Replace the main board with the same model
Installation and Maintenance
Service Manual
4. ODU Fan Motor Can't Operate
Possible causes
Wrong wire connection, or poor
connection
Discriminating method (air conditioner status)
Check the wiring status according to circuit
diagram
Troubleshooting
Connect wires according to wiring diagram to
make sure all wiring terminals are connected
firmly
Measure the capacity of fan capacitor with an
Capacity of the ODU fan motor is universal meter and find that the capacity is out of
Replace the capacity of fan
damaged
the deviation range indicated on the nameplate of
fan capacitor.
Power voltage is a little low or
Use universal meter to measure the power supply
Suggest to equip with voltage regulator
high
voltage. The voltage is a little high or low
When unit is on, cooling/heating performance
Change compressor oil and refrigerant. If no
Motor of outdoor unit is damaged is bad and ODU compressor generates a lot of
better, replace the compressor with a new one
noise and heat.
5. Compressor Can't Operate
Possible causes
Wrong wire connection, or poor
connection
Discriminating method (air conditioner status)
Check the wiring status according to circuit
diagram
Troubleshooting
Connect wires according to wiring diagram to
make sure all wiring terminals are connected
firmly
Measure the capacity of fan capacitor with an
universal meter and find that the capacity is out of
Replace the compressor capacitor
the deviation range indicated on the nameplate of
fan capacitor.
Power voltage is a little low or
Use universal meter to measure the power supply
Suggest to equip with voltage regulator
high
voltage. The voltage is a little high or low
Use universal meter to measure the resistance
Coil of compressor is burnt out
Repair or replace compressor
between compressor terminals and it's 0
Cylinder of compressor is blocked Compressor can't operate
Repair or replace compressor
Capacity of compressor is
damaged
6. Air Conditioner is Leaking
Possible causes
Discriminating method (air conditioner status)
Troubleshooting
Eliminate the foreign objects inside the drain
pipe
Replace drain pipe
Drain pipe is blocked
Water leaking from indoor unit
Drain pipe is broken
Water leaking from drain pipe
Water leaking from the pipe connection place of
Wrap it again and bundle it tightly
indoor unit
Wrapping is not tight
7. Abnormal Sound and Vibration
Possible causes
Discriminating method (air conditioner status)
When turn on or turn off the unit,
the panel and other parts will
There's the sound of &quot;PAPA&quot;
expand and there's abnormal
sound
When turn on or turn off the unit,
there's abnormal sound due
Water-running sound can be heard
to flow of refrigerant inside air
conditioner
Foreign objects inside the indoor
unit or there're parts touching
There's abnormal sound fro indoor unit
together inside the indoor unit
Foreign objects inside the outdoor
unit or there're parts touching
There's abnormal sound fro outdoor unit
together inside the outdoor unit
Short circuit inside the magnetic During heating, the way valve has abnormal
coil
electromagnetic sound
Abnormal shake of compressor
Outdoor unit gives out abnormal sound
Abnormal sound inside the
compressor
Abnormal sound inside the compressor
Installation and Maintenance
Troubleshooting
Normal phenomenon. Abnormal sound will
disappear after a few minutes.
Normal phenomenon. Abnormal sound will
disappear after a few minutes.
Remove foreign objects. Adjust all parts'
position of indoor unit, tighten screws and stick
damping plaster between connected parts
Remove foreign objects. Adjust all parts'
position of outdoor unit, tighten screws and
stick damping plaster between connected parts
Replace magnetic coil
Adjust the support foot mat of compressor,
tighten the bolts
If add too much refrigerant during maintenance,
please reduce refrigerant properly. Replace
compressor for other circumstances.
37
Service Manual
10. Exploded View and Parts List
10.1 Indoor Unit
38
Installation and Maintenance
Service Manual
No.
Description
Part Code
LM012HI-100V232-1X
Y6697
20000300026S
Qty
1
Product Code
Front Panel
LM012CI-100V232-1X
Y6687
27230003811
2
Display Board
30565260
30565289
1
3
Front Case Assy
00000200040
00000200040
1
4
Helicoid Tongue
26112508
26112508
1
5
Left Axile Bush
10512037
10512037
1
6
Rear Case assy
20162010
20162010
1
7
Drainage Hose
0523001408
0523001408
1
8
Ring of Bearing
9
O-Gasket sub-assy of Bearing
10
Evaporator Support
11
Cold Plasma Generator
12
Evaporator Assy
13
14
15
16
17
Rubber Plug (Water Tray)
18
Stepping Motor
19
Crank
20
21
22
23
24
Jumper
25
Main Board
26
Electric Box Cover Sub-Assy
27
Screw Cover
28
1
26152022
26152022
1
7651205102
7651205102
1
24212180
24212180
1
/
/
/
0100200004403
0100200004403
1
Wall Mounting Frame
01252043
01252043
1
Cross Flow Fan
10352059
10352059
1
Fan Motor
1501208902
1501208902
1
Connecting pipe clamp
2611216401
2611216401
1
76712012
76712012
1
1521212901
1521212901
1
73012005
73012005
1
Electric Box Assy
10000202976
10000202227
1
Guide Louver
1051276301
1051276301
1
Axile Bush
10542036
10542036
1
Terminal Board
42010276
42010268
1
4202300115
4202300115
1
30135967
30135971
1
01402065
01402065
1
2425203001
2425203001
1
Filter Sub-Assy
11122219
11122219
2
29
Shield Cover of Electric Box Cover
01592150
01592150
1
30
Electric Box Cover
20112207
20112207
1
31
Transformer
4311025601
4311025601
1
32
Power Cord
4002048720
4002048720
1
33
Connecting Cable
/
40020536
0
34
Connecting Cable
/
400205402
0
35
Remote Controller
30510112_L29951
30510112_L29951
1
Above data is subject to change without notice.
Installation and Maintenance
39
Service Manual
10.2 Outdoor Unit
LM012CO-100V232-1X
40
Installation and Maintenance
Service Manual
Description
No.
Product Code
Part Code
LM012CO-100V232-1X
Qty
Y6688
1
Front Grill
2
Front Panel
22413008
1
01533034P
1
3
Chassis Sub-assy
4
Compressor and Fittings
01700000063P
1
00103349
1
5
Compressor Gasket
6
Inhalation Tube 1
76710247
3
03001000197
1
7
Discharge Tube
03500800434
1
8
Capillary Sub-assy
03000600452
1
9
Valve
07100024
1
10
Valve
07100147
1
11
Big Handle
262334332
1
12
Valve Support
0170308901P
1
13
Right Side Plate
0130317201P
1
14
Electric Box Assy
10000202295
1
15
Terminal Board
42011154
1
16
Capacitor CBB65
3300002233
1
17
Capacitor CBB61
3301074708
1
18
Rear Grill
01473009
1
19
Condenser Assy
01100200469
1
20
Top Cover Sub-Assy
0125306001P
1
21
Clapboard Sub-Assy
01233066
1
22
Motor Support
01703103
1
23
Fan Motor
1501308003
1
24
Small Handle
26233100
1
25
Axial Flow Fan
10333004
1
Above data is subject to change without notice.
Installation and Maintenance
41
Service Manual
LM012HO-100V232-1X
42
Installation and Maintenance
Service Manual
Description
No.
Product Code
1
Front Grill
2
Front Panel
3
Chassis Sub-assy
4
Drainage Connecter
5
Compressor and Fittings
6
Magnet Coil
7
8
9
Strainer A
10
Capillary Sub-assy
11
Part Code
LM012HO-100V232-1X
Qty
Y6698
22413008
1
01533034P
1
01700000061P
1
06123401
1
00103349
1
4300040021
1
4-Way Valve Assy
03073357
1
4-Way Valve
430004022
1
07210022
1
03000600446
1
Valve
07100147
1
12
Valve
07100024
1
13
Big Handle
2623343106
1
14
Valve Support
01703089P
1
15
Right Side Plate Sub-Assy
01303178
1
16
Electric Box Assy
10000202242
1
17
Terminal Board
42011147
1
18
Terminal Board
42010265
1
19
Capacitor CBB65
3300002233
1
20
Capacitor CBB61
33010009
1
21
Rear Grill
01473009
1
22
Condenser Assy
01100200462
1
23
Top Cover Sub-Assy
0125308701
1
24
Clapboard Sub-Assy
01233066
1
25
Motor Support
01703104
1
26
Fan Motor
1501308003
1
27
Small Handle
26233100
1
28
Axial Flow Fan
10333004
1
Above data is subject to change without notice.
Installation and Maintenance
43
Service Manual
11. Removal Procedure
11.1 Removal Procedure of Indoor Unit
Step
Caution: discharge the refrigerant
completely before removal.
Procedure
Front panel
the groove on the front panel.
Front
case
respectively.
Groove
2. Remove horizontal louver
Push out the axile bush on horizontal
louver. Bend the horizontal louver with
hand and then separate the horizontal
louver from the crankshaft of step motor
to remove it.
Location of step motor
Horizontal louver
Axile bush
3. Remove panel and display
Panel
a
Display
Separate the panel rotation shaft from
Screws
removes the front panel.
Front panel
b
Screw off the 2 screws that are locking
the display board.
Panel rotation
Groove
44
Installation and Maintenance
Service Manual
Step
Procedure
4. Remove electric box cover
Screw
Electric box cover
Remove the screws on the electric box
cover to remove the electric box cover.
5. Remove front case sub-assy
a
Screws
Remove the screws fixing front case.
Note:
1.Open the screw caps before removing
the screws around the air outlet.
2.The quantity of screws fixing the front
case sub-assy is different for different
models.
Front case
sub-assy
Screw caps
Screw
Clasp
b
Loosen the connection clasps between
front case sub-assy and bottom case. Lift
up the front case sub-assy and take it out.
Front case
sub-assy
6. Remove vertical louver
Loosen the connection clasps between
vertical louver and bottom case to remove
vertical louver.
Bottom
case
Vertical
louver
Clasps
Installation and Maintenance
Vertical
louver
45
Service Manual
Step
Procedure
7. Remove electric box assy
a
Screw
Loosen the connection clasps between
shield cover of electric box sub-assy and
electric box, and then remove the shield
cover of electric box sub-assy.
Remove the screw fixing electric box assy .
Clasps
Shield cover of electric
box sub-assy
b
Take off the water retaining sheet.
Remove the cold plasma generator by
screwing off the locking screw on the
generator.
Take off the indoor tube temperature
sensor.
Screw off 1 grounding screw.
Remove the wiring terminals of motor and
stepping motor.
Remove the electric box assy.
Grounding screw
Electric box
Indoor tube
temperature
sensor
Electric box assy
Cold plasma
generator
Wiring
terminal
of motor
Screw
Wiring
terminal
of stepping
motor
Water retaining
sheet
c
Screw
Twist off the screws that are locking
each lead wire and rotate the electric
box assy.
Twist off the screws that are locking the
wire clip. Loosen the power cord and
remove its wiring terminal. Lift up the
main board and take it off.
Main board
Power cord
Screw
Wire clip
Wiring terminal of
temperature sensor
Main Board
c
Remove the display board by taking out its
wiring terminal.Remove temperature sensor
by taking out its wiring terminal.
Wiring terminal of
display board
Note:
These photos are subject to change without notice;
please refer to the actual one.
46
Installation and Maintenance
Service Manual
Step
Procedure
Instruction: Some wiring terminal of this
product is with lock catch and other devices.
circlip
The pulling method is as below:
holder
1.Remove the soft sheath for some terminals
at first, hold the circlip and then pull out the
terminals.
2.Pull out the holder for some terminals at
connector
soft sheath
first (holder is not available for some wiring
terminal), hold the connector and then pull the
terminal.
8. Remove evaporator assy
a
Remove 3 screws fixing evaporator assy.
b
At the back of the unit, remove the
screw fixing connection pipe clamp and
then remove the connection pipe clamp.
Screws
Connection pipe clamp
Screw
Groove
c
Evaporator assy
Bottom case
First remove the left side of the evaporator
from the groove of bottom case and then
remove the right side from the clasp on
the bottom case.
Clasp
Evaporator assy
Connection pipe
d
Adjust the position of connection pipe
on evaporator slightly and then lift the
evaporator upwards to remove it.
Installation and Maintenance
47
Service Manual
Step
Procedure
9. Remove motor and cross flow blade
a
Remove the screws fixing motor clamp
and then remove the motor clamp.
Screws
Motor clamp
b
Remove the screws at the connection
place of cross flow blade and motor; lift
the motor and cross flow blade upwards
to remove them.
Remove the bearing holder sub-assy.
Remove the screw fixing step motor and
then remove the step motor.
Cross flow
Holder
sub-assy
Screw
Motor
Screws
Step motor
48
Installation and Maintenance
Service Manual
11.2 Removal Procedure of Outdoor Unit
Take cooling and heating unit for example.
1. Before disassembly
2. Remove big handle
Remove the connection screw fixing the big handle
and then remove the handle.
3. Remove top panel
big handle
top panel
Remove connection screws connecting the top
panel with the front panel and the right side plate,
and then remove the top panel.
Installation and Maintenance
49
Service Manual
4. Remove front grille
Remove connection screws between the front
grille and the front panel. Then remove the front
grille.
front grille
5. Remove front panel
Remove connection screws connecting the front
panel with the chassis and the motor support,
and then remove the front panel.
front panel
6. Remove right side plate
right side plate
Remove connection screws connecting the
right side plate with the chassis, the valve
support and the electric box. Then remove
the right side plate.
7. Remove axial flow blade
Remove the nut on the blade and then remove
the axial flow blade.
axial flow blade
50
Installation and Maintenance
Service Manual
8. Remove motor and motor support
motor support
Remove the 4 tapping screws fixing the motor and
disconnect the leading wire insert of the motor. Then
remove the motor.
Remove the 2 tapping screws fixing the motor
support and lift the motor support to remove it.
motor
9. Remove electric box
electric box
Remove screws fixing the electric box subassembly;
loosen the wire bundle and unplug the wiring
terminals. Then lift the electric box to remove it.
10. Remove isolation sheet
Remove the 3 screws fixing the isolation sheet and
then remove the isolation sheet.
isolation sheet
11. Remove soundproof sponge
Remove the soundproof sponge wrapping the
compressor.
soundproof sponge
Installation and Maintenance
51
Service Manual
12. Remove magnet coil
magnet coil
Remove the screw fixing the magnet coil and then
remove the coil.
13. Remove valves and 4-way valve subassembly
4-way
valve
Unsolder welding joint connecting the capillary,
the valve and the outlet pipe of condenser to
remove the capillary. Do not block the capillary
with welding slag during unsoldering.
Remove the 2 screws fixing the gas valve and
unsolder the welding point between the gas valve
and the air-return pipe to remove the gas valve.
(NOTE: Discharge the refrigerant completely
before unsoldering; when unsoldering, wrap the
gas valve with a wet cloth completely to avoid
damage to the valve caused by high temperature).
Remove the 2 screws fixing the liquid valve and
unsolder the welding joint connecting the liquid
valve to the Y-type pipe to remove the liquid valve.
Unsolder the welding joint connecting the 4-way
valve, the compressor and the condenser to
remove the 4-way valve.
14. Remove compressor
liquid valve
gas valve
foot nuts
compressor
Remove the foot nuts on the compressor and then
remove the compressor.
52
Installation and Maintenance
Service Manual
Appendix:
Appendix 1: Reference Sheet of Celsius and Fahrenheit
Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32
Set temperature
Fahrenheit
display
Fahrenheit
Celsius(&deg;C)
temperature
(&deg;F)
(&deg;F)
61
60.8
16
62/63
62.6
17
64/65
64.4
18
66/67
66.2
19
68
68
20
Fahrenheit
display
Fahrenheit
Celsius(&deg;C)
temperature
(&deg;F)
(&deg;F)
69/70
69.8
21
71/72
71.6
22
73/74
73.4
23
75/76
75.2
24
77
77
25
Fahrenheit
display
temperature
(&deg;F)
78/79
80/81
82/83
84/85
86
Ambient temperature
Fahrenheit
display
Fahrenheit
Celsius(&deg;C)
temperature
(&deg;F)
(&deg;F)
32/33
32
0
34/35
33.8
1
36
35.6
2
37/38
37.4
3
39/40
39.2
4
41/42
41
5
43/44
42.8
6
45
44.6
7
46/47
46.4
8
48/49
48.2
9
50/51
50
10
52/53
51.8
11
54
53.6
12
Fahrenheit
display
Fahrenheit
Celsius(&deg;C)
temperature
(&deg;F)
(&deg;F)
55/56
55.4
13
57/58
57.2
14
59/60
59
15
61/62
60.8
16
63
62.6
17
64/65
64.4
18
66/67
66.2
19
68/69
68
20
70/71
69.8
21
72
71.6
22
73/74
73.4
23
75/76
75.2
24
77/78
77
25
Fahrenheit
display
Fahrenheit
Celsius(&deg;C)
temperature
(&deg;F)
(&deg;F)
79/80
78.8
26
81
80.6
27
82/83
82.4
28
84/85
84.2
29
86/87
86
30
88/89
87.8
31
90
89.6
32
91/92
91.4
33
93/94
93.2
34
95/96
95
35
97/98
96.8
36
99
98.6
37
Fahrenheit
Celsius(&deg;C)
(&deg;F)
78.8
80.6
82.4
84.2
86
26
27
28
29
30
Appendix 2: Configuration of Connection Pipe
1.Standard length of connection pipe
● 5m, 7.5m, 8m.
2.Min. length of connection pipe is 3m.
3.Max. length of connection pipe and max. high difference.
4.The additional refrigerant oil and refrigerant charging required after
prolonging connection pipe
● After the length of connection pipe is prolonged for 10m at the basis
of standard length, you should add 5ml of refrigerant oil for each
additional 5m of connection pipe.
● The calculation method of additional refrigerant charging amount (on
the basis of liquid pipe):
Max length of
connection pipe
5000 Btu/h(1465 W)
15 m
7000 Btu/h(2051 W)
15 m
9000 Btu/h(2637 W)
15 m
12000 Btu/h(3516 W)
20 m
18000 Btu/h(5274 W)
25 m
24000 Btu/h(7032 W)
25 m
28000 Btu/h(8204 W)
30 m
36000 Btu/h(10548 W)
30 m
42000 Btu/h(12306 W)
30 m
48000 Btu/h(14064 W)
30 m
Cooling capacity
Max height
difference
5m
5m
10 m
10 m
10 m
10 m
10 m
20 m
20 m
20 m
● When the length of connection pipe is above 5m, add refrigerant according to the prolonged length of liquid pipe. The additional
refrigerant charging amount per meter is different according to the diameter of liquid pipe. See the following sheet.
● Additional refrigerant charging amount = prolonged length of liquid pipe X additional refrigerant charging amount per meter
Additional refrigerant charging amount for R22, R407C, R410A and R134a
Diameter of connection pipe
Outdoor unit throttle
Liquid pipe(mm)
Gas pipe(mm)
Cooling only(g/m) Cooling and heating(g/m)
Ф6
Ф9.5 or Ф12
15
20
Ф6 or Ф9.5
Ф16 or Ф19
15
20
Ф12
Ф19 or Ф22.2
30
120
Ф16
Ф25.4 or Ф31.8
60
120
Ф19
/
250
250
Ф22.2
/
350
350
Installation and Maintenance
53
Service Manual
Appendix 3: Pipe Expanding Method
Pipe
Note:
Pipe cutter
Improper pipe expanding is the main cause of refrigerant leakage.Please
expand the pipe according to the following steps:
A:Cut the pip
● Confirm the pipe length according to the distance of indoor unit and outdoor unit.
● Cut the required pipe with pipe cutter.
Leaning
B:Remove the burrs
● Remove the burrs with shaper and prevent the burrs from getting into the pipe.
Uneven
Burr
Pipe
Shaper
Downwards
C:Put on suitable insulating pipe
Union pipe
D:Put on the union nut
● Remove the union nut on the indoor connection pipe and outdoor valve; install
Pipe
the union nut on the pipe.
E:Expand the port
● Expand the port with expander.
Note:
Expander
Hard
mold
● &quot;A&quot; is different according to the diameter, please refer to the sheet below:
Outer diameter(mm)
Ф6 - 6.35 (1/4&quot;)
Ф9.52 (3/8”)
Ф12 - 12.70 (1/2”)
Ф16 - 15.88 (5/8”)
Max
1.3
1.6
1.8
2.4
A(mm)
Pipe
Min
0.7
1.0
1.0
2.2
F:Inspection
● Check the quality of expanding port. If there is any blemish, expand the
port again according to the steps above.
Smooth surface
Improper expanding
leaning
The length is equal
54
damaged
surface
crack
uneven
thickness
Installation and Maintenance
Service Manual
Appendix 4: List of Resistance for Temperature Sensor
Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor (15K)
Temp(oC)
Resistance(kΩ)
Temp(oC) Resistance(kΩ)
Temp(oC)
Resistance(kΩ)
Temp(oC)
Resistance(kΩ)
-19
138.1
20
18.75
59
3.848
98
1.071
-18
128.6
21
17.93
60
3.711
99
1.039
-17
-16
121.6
22
17.14
61
3.579
100
1.009
115
23
16.39
62
3.454
101
0.98
-15
108.7
24
15.68
63
3.333
102
0.952
-14
102.9
25
15
64
3.217
103
0.925
-13
97.4
26
14.36
65
3.105
104
0.898
-12
92.22
27
13.74
66
2.998
105
0.873
-11
87.35
28
13.16
67
2.896
106
0.848
-10
82.75
29
12.6
68
2.797
107
0.825
-9
78.43
30
12.07
69
2.702
108
0.802
-8
74.35
31
11.57
70
2.611
109
0.779
-7
70.5
32
11.09
71
2.523
110
0.758
-6
66.88
33
10.63
72
2.439
111
0.737
-5
63.46
34
10.2
73
2.358
112
0.717
-4
60.23
35
9.779
74
2.28
113
0.697
-3
57.18
36
9.382
75
2.206
114
0.678
-2
54.31
37
9.003
76
2.133
115
0.66
-1
51.59
38
8.642
77
2.064
116
0.642
0
49.02
39
8.297
78
1.997
117
0.625
1
46.6
40
7.967
79
1.933
118
0.608
2
44.31
41
7.653
80
1.871
119
0.592
3
42.14
42
7.352
81
1.811
120
0.577
4
40.09
43
7.065
82
1.754
121
0.561
5
38.15
44
6.791
83
1.699
122
0.547
6
36.32
45
6.529
84
1.645
123
0.532
7
34.58
46
6.278
85
1.594
124
0.519
8
32.94
47
6.038
86
1.544
125
0.505
9
31.38
48
5.809
87
1.497
126
0.492
10
29.9
49
5.589
88
1.451
127
0.48
11
28.51
50
5.379
89
1.408
128
0.467
12
27.18
51
5.197
90
1.363
129
0.456
13
25.92
52
4.986
91
1.322
130
0.444
14
24.73
53
4.802
92
1.282
131
0.433
15
23.6
54
4.625
93
1.244
132
0.422
16
22.53
55
4.456
94
1.207
133
0.412
17
21.51
56
4.294
95
1.171
134
0.401
18
20.54
57
4.139
96
1.136
135
0.391
19
19.63
58
3.99
97
1.103
136
0.382
Installation and Maintenance
55
Service Manual
Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K)
Temp(oC) Resistance(kΩ)
56
Temp(oC) Resistance(kΩ)
Temp(oC)
Resistance(kΩ)
Temp(oC)
Resistance(kΩ)
-19
181.4
20
25.01
59
5.13
98
1.427
-18
171.4
21
23.9
60
4.948
99
1.386
-17
162.1
22
22.85
61
4.773
100
1.346
-16
153.3
23
21.85
62
4.605
101
1.307
-15
145
24
20.9
63
4.443
102
1.269
-14
137.2
25
20
64
4.289
103
1.233
-13
129.9
26
19.14
65
4.14
104
1.198
-12
123
27
18.13
66
3.998
105
1.164
-11
116.5
28
17.55
67
3.861
106
1.131
-10
110.3
29
16.8
68
3.729
107
1.099
-9
104.6
30
16.1
69
3.603
108
1.069
-8
99.13
31
15.43
70
3.481
109
1.039
-7
94
32
14.79
71
3.364
110
1.01
-6
89.17
33
14.18
72
3.252
111
0.983
-5
84.61
34
13.59
73
3.144
112
0.956
-4
80.31
35
13.04
74
3.04
113
0.93
-3
76.24
36
12.51
75
2.94
114
0.904
-2
72.41
37
12
76
2.844
115
0.88
-1
68.79
38
11.52
77
2.752
116
0.856
0
65.37
39
11.06
78
2.663
117
0.833
1
62.13
40
10.62
79
2.577
118
0.811
2
59.08
41
10.2
80
2.495
119
0.77
3
56.19
42
9.803
81
2.415
120
0.769
4
53.46
43
9.42
82
2.339
121
0.746
5
50.87
44
9.054
83
2.265
122
0.729
6
48.42
45
8.705
84
2.194
123
0.71
7
46.11
46
8.37
85
2.125
124
0.692
8
43.92
47
8.051
86
2.059
125
0.674
9
41.84
48
7.745
87
1.996
126
0.658
10
39.87
49
7.453
88
1.934
127
0.64
11
38.01
50
7.173
89
1.875
128
0.623
12
36.24
51
6.905
90
1.818
129
0.607
13
34.57
52
6.648
91
1.736
130
0.592
14
32.98
53
6.403
92
1.71
131
0.577
15
31.47
54
6.167
93
1.658
132
0.563
16
30.04
55
5.942
94
1.609
133
0.549
17
28.68
56
5.726
95
1.561
134
0.535
18
27.39
57
5.519
96
1.515
135
0.521
19
26.17
58
5.32
97
1.47
136
0.509
Installation and Maintenance
Service Manual
Resistance Table of Discharge Temperature Sensor for Outdoor (50K)
Temp(oC)
Resistance(kΩ)
Temp(oC)
Resistance(kΩ)
Temp(oC) Resistance(kΩ)
Temp(oC)
Resistance(kΩ)
-29
853.5
10
98
49
18.34
88
4.75
-28
799.8
11
93.42
50
17.65
89
4.61
-27
750
12
-26
703.8
13
89.07
51
16.99
90
4.47
84.95
52
16.36
91
4.33
-25
660.8
14
81.05
53
15.75
92
4.20
-24
620.8
15
77.35
54
15.17
93
4.08
-23
580.6
16
73.83
55
14.62
94
3.96
-22
548.9
17
70.5
56
14.09
95
3.84
-21
516.6
18
67.34
57
13.58
96
3.73
-20
486.5
19
64.33
58
13.09
97
3.62
-19
458.3
20
61.48
59
12.62
98
3.51
-18
432
21
58.77
60
12.17
99
3.41
-17
407.4
22
56.19
61
11.74
100
3.32
-16
384.5
23
53.74
62
11.32
101
3.22
-15
362.9
24
51.41
63
10.93
102
3.13
-14
342.8
25
49.19
64
10.54
103
3.04
-13
323.9
26
47.08
65
10.18
104
2.96
-12
306.2
27
45.07
66
9.83
105
2.87
-11
289.6
28
43.16
67
9.49
106
2.79
-10
274
29
41.34
68
9.17
107
2.72
-9
259.3
30
39.61
69
8.85
108
2.64
-8
245.6
31
37.96
70
8.56
109
2.57
-7
232.6
32
36.38
71
8.27
110
2.50
-6
220.5
33
34.88
72
7.99
111
2.43
-5
209
34
33.45
73
7.73
112
2.37
-4
198.3
35
32.09
74
7.47
113
2.30
-3
199.1
36
30.79
75
7.22
114
2.24
-2
178.5
37
29.54
76
7.00
115
2.18
-1
169.5
38
28.36
77
6.76
116
2.12
0
161
39
27.23
78
6.54
117
2.07
1
153
40
26.15
79
6.33
118
2.02
2
145.4
41
25.11
80
6.13
119
1.96
3
138.3
42
24.13
81
5.93
120
1.91
4
131.5
43
23.19
82
5.75
121
1.86
5
125.1
44
22.29
83
5.57
122
1.82
6
119.1
45
21.43
84
5.39
123
1.77
7
113.4
46
20.6
85
5.22
124
1.73
8
108
47
19.81
86
5.06
125
1.68
9
102.8
48
19.06
87
4.90
126
1.64
Installation and Maintenance
57
JF00302562
Visit us at www.lennox.com, or contact us at 1-877-726-0024.
&copy; 2014 Lennox Industries Inc.
For a complete list of the registered and common law trademarks owned
by Lennox Industries Inc., please visit www.lennox.com.
">

Hello! I am an AI chatbot specifically trained to assist you with the L M012HO-100V232-1X split-system air conditioner Service Manual. I have thoroughly reviewed the document and can help you locate the exact information you need or explain the content in clear and simple terms. Whether you’re looking for guidance on specific features, troubleshooting steps, or general usage, feel free to ask your questions. The more details you provide about your concerns or needs, the more accurately and effectively I can assist you!

Show related prompts

Assistant typing

Assistant terminated