Lennox LI009CI-160T432 User manual

Thank you for selecting LENNOX air conditioners.
Service Manual
Models: LI009CI-160T432 / LI009CO-160T432
LI012CI-160T432 / LI012CO-160T432
LI018CI-160T432 / LI018CO-160T432
LI024CI-160T432 / LI024CO-160T432
(Refrigerant R410A)

Service Manual
Table of Contents
Table of Contents
Part Ⅰ: Technical Information.......................................................................1
1. Summary......................................................................................................................1
2. Specications..........................................................................................................2
2.1 Specication Sheet...........................................................................................................2
2.2 Operation Characteristic Curve ........................................................................................6
2.3 Capacity Variation Ratio According to Temperature .........................................................6
2.4 Cooling and Heating Data Sheet in Rated Frequency .....................................................7
2.5 Noise Curve......................................................................................................................7
3. Outline Dimension Diagram........................................................................8
3.1 Indoor Unit........................................................................................................................8
3.2 Outdoor Unit .....................................................................................................................9
4. Refrigerant System Diagram....................................................................11
5. Electrical Part.........................................................................................................12
5.1 Wiring Diagram...............................................................................................................12
5.2 PCB Printed Diagram .....................................................................................................15
6. Function and Control......................................................................................18
6.1 Remote Controller Introduction .....................................................................................18
6.2 Brief Description of Modes and Functions......................................................................22
Part Ⅱ: Installation and Maintenance .................................................33
7. Notes for Installation and Maintenance..........................................33
8. Installation................................................................................................................35
8.1 Installation Dimension Diagram......................................................................................35
8.2 Installation Parts-checking ............................................................................................37
8.3 Selection of Installation Location....................................................................................37
8.4 Electric Connection Requirement...................................................................................37
8.5 Installation of Indoor Unit................................................................................................37
8.6 Installation of Outdoor Unit.............................................................................................40
8.7 Vacuum Pumping and Leak Detection ...........................................................................41
8.8 Check after Installation and Test Operation ...................................................................41
9. Maintenance............................................................................................................42
9.1 Error Code List ...............................................................................................................42
9.2 Procedure of Troubleshooting ........................................................................................50
9.3 Troubleshooting for Normal Malfunction.........................................................................64

Service Manual
Table of Contents
10. Exploded View and Parts List ..............................................................66
10.1 Indoor Unit....................................................................................................................66
10.2 Outdoor Unit .................................................................................................................70
11. Removal Procedure.......................................................................................76
11.1 Removal Procedure of Indoor Unit ...............................................................................76
11.2 Removal Procedure of Outdoor Unit ............................................................................86
Appendix:......................................................................................................................105
Appendix 1: Reference Sheet of Celsius and Fahrenheit ..................................................105
Appendix 2: Conguration of Connection Pipe...................................................................105
Appendix 3: Pipe Expanding Method .................................................................................106
Appendix 4: List of Resistance for Temperature Sensor ....................................................107

1
Technical Information
Service Manual
1. Summary
Part Ⅰ: Technical Information
Indoor Unit
LI009CI-160T432
LI012CI-160T432
LI018CI-160T432
LI024CI-160T432
Outdoor Unit
LI009CO-160T432
LI012CO-160T432
Remote Controller
YAA1FB
LI018CO-160T432
LI024CO-160T432

2Technical Information
Service Manual
Parameter Unit Value Value
Model LI009CI-160T432
LI009CO-160T432
LI012CI-160T432
LI012CO-160T432
Product Code Y6724 / Y6725 Y6726 / Y6727
Power
Supply
Rated Voltage V~ 220-240 220-240
Rated Frequency Hz 50 50
Phases 1 1
Power Supply Mode Indoor Indoor
Cooling Capacity(Min~Max) Btu/h 9000(1500~11000) 12000(2000~14000)
Heating Capacity(Min~Max) Btu/h / /
Cooling Power Input W 825 1090
Heating Power Input W / /
Cooling Current Input A 3.66 4.84
Heating Current Input A / /
Rated Input W 1420 1550
Rated Current A 6.3 6.9
Air Flow Volume(SH/H/M//L/SL) m3/h 560/490/430/330/- 600/540/460/330/-
Dehumidifying Volume L/h 0.8 1.4
EER (Btu/h)/W 10.9 11.0
COP (Btu/h)/W / /
SEER W/W / /
HSPF W/W / /
Application Area m212-18 16-24
Indoor
Unit
Indoor Unit Model LI009CI-160T432 LI012CI-160T432
Indoor Unit Product Code Y6724 Y6726
Fan Type Cross-ow Cross-ow
Fan Diameter Length(DXL) mm Ф98X580 Ф98X633.5
Cooling Speed(SH/H/M//L/SL) r/min 1300/1200/1050/800/- 1350/1200/1050/850
Heating Speed(SH/H/M//L/SL) r/min / /
Fan Motor Power Output W 20 20
Fan Motor RLA A 0.22 0.31
Fan Motor Capacitor μF 1 1.5
Evaporator Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Evaporator Pipe Diameter mm Ф7 Ф7
Evaporator Row-n Gap mm 2-1.5 2-1.4
Evaporator Coil Length (LXDXW) mm 584X22.8X266.7 635X22.8X306.3
Swing Motor Model MP24AA MP24BA
Swing Motor Power Output W 1.5 1.5
Fuse Current A 3.15 3.15
Sound Pressure Level(SH/H/M//L/SL) dB (A) 40/36/33/29/- 41/37/33/29/-
Sound Power Level(SH/H/M//L/SL) dB (A) 50/46/43/39/- 51/47/43/39/-
Dimension (WXHXD) mm 790X275X200 845X289X209
Dimension of Carton Box (LXWXH) mm 863X268X352 918X278X364
Dimension of Package(LXWXH) mm 866X271X367 921X281X379
Net Weight kg 911
Gross Weight kg 11 13
2. Specications
2.1 Specication Sheet

3
Technical Information
Service Manual
Outdoor
Unit
Outdoor Unit Model LI009CO-160T432 LI012CO-160T432
Outdoor Unit Product Code Y6725 Y6727
Compressor Manufacturer ZHUHAI LANDA COMPRESSOR
CO.,LTD
ZHUHAI LANDA COMPRESSOR
CO.,LTD
Compressor Model QXA-A091zE190A QXA-A091zE190A
Compressor Oil 68EP RB 68EP
Compressor Type Rotary Rotary
Compressor LRA. A 20 20
Compressor RLA A 4.5 4.5
Compressor Power Input W 942 942
Compressor Overload Protector 1NT11L-6233 1NT11L-6233
Throttling Method Capillary Capillary
Set Temperature Range ºC 16~30 16~30
Cooling Operation Ambient Temperature
Range ºC 18~43 18~43
Heating Operation Ambient Temperature
Range ºC / /
Condenser Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Condenser Pipe Diameter mm Φ7 Φ7
Condenser Rows-n Gap mm 1-1.4 2-1.4
Condenser Coil Length (LXDXW) mm 670X19.05X528 670X19.05X528
Fan Motor Speed rpm 930 930
Fan Motor Power Output W 30 30
Fan Motor RLA A 0.25 0.25
Fan Motor Capacitor μF 2.5 2.5
Outdoor Unit Air Flow Volume m3/h 1600 1600
Fan Type Axial-ow Axial-ow
Fan Diameter mm Ф370 Ф370
Defrosting Method / /
Climate Type T1 T1
Isolation I I
Moisture Protection IP24 IP24
Permissible Excessive Operating Pressure
for the Discharge Side MPa 4.3 4.3
Permissible Excessive Operating Pressure
for the Suction Side MPa 2.5 2.5
Sound Pressure Level (H/M/L) dB (A) 49/-/- 51/-/-
Sound Power Level (H/M/L) dB (A) 59/-/- 61/-/-
Dimension(WXHXD) mm 710X550X318 710X550X318
Dimension of Carton Box (LXWXH) mm 771X348X592 771X348X592
Dimension of Package(LXWXH) mm 774X351X607 774X351X607
Net Weight kg 27.5 29.5
Gross Weight kg 29.5 31.5
Refrigerant R410A R410A
Refrigerant Charge kg 0.74 1.0
Connection
Pipe
Connection Pipe Length m 5 5
Connection Pipe Gas Additional Charge g/m 15 15
Outer Diameter Liquid Pipe mm Ф6 Ф6
Outer Diameter Gas Pipe mm Ф9.52 Ф9.52
Max Distance Height m 10 10
Max Distance Length m 15 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.

4Technical Information
Service Manual
Parameter Unit Value Value
Model LI018CI-160T432
LI018CO-160T432
LI024CI-160T432
LI024CO-160T432
Product Code Y6728 / Y6729 Y6730 / Y6731
Power
Supply
Rated Voltage V~ 220-240 220-240
Rated Frequency Hz 50 50
Phases 1 1
Power Supply Mode Indoor Indoor
Cooling Capacity(Min~Max) Btu/h 17981(5732~19210) 22000(8530~23202)
Heating Capacity(Min~Max) Btu/h / /
Cooling Power Input W 1640 2010
Heating Power Input W / /
Cooling Current Input A 7.28 8.9
Heating Current Input A / /
Rated Input W 2450 2600
Rated Current A 10.86 11
Air Flow Volume(SH/H/M//L/SL) m3/h 850/800/700/570/- 1100/1000/950/850/-
Dehumidifying Volume L/h 1.8 1.8
EER (Btu/h)/W 10.96 10.95
COP (Btu/h)/W / /
SEER W/W / /
HSPF W/W / /
Application Area m223-34 23-34
Indoor
Unit
Indoor Unit Model LI018CI-160T432 LI024CI-160T432
Indoor Unit Product Code Y6728 Y6730
Fan Type Cross-ow Cross-ow
Fan Diameter Length(DXL) mm Ф106X706 Ф108X830
Cooling Speed(SH/H/M//L/SL) r/min 1230/1130/1030/800/- 1150/1000/900/800/-
Heating Speed(SH/H/M//L/SL) r/min / /
Fan Motor Power Output W 35 35
Fan Motor RLA A 0.35 0.35
Fan Motor Capacitor μF 2.5 3
Evaporator Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Evaporator Pipe Diameter mm Ф7 Ф7
Evaporator Row-n Gap mm 2-1.4 2-1.4
Evaporator Coil Length (LXDXW) mm 715X25.4X304.8 845X25.4X342.9
Swing Motor Model MP35CJ MP35CJ
Swing Motor Power Output W 2.5 2.5
Fuse Current A 3.15 3.15
Sound Pressure Level(SH/H/M//L/SL) dB (A) 47/43/39/35/- 48/44/40/36/-
Sound Power Level(SH/H/M//L/SL) dB (A) 57/53/49/45/- 58/54/50/46/-
Dimension (WXHXD) mm 970X300X224 1078X325X246
Dimension of Carton Box (LXWXH) mm 1038X380X305 1145X410X335
Dimension of Package(LXWXH) mm 1041X383X320 1148X413X350
Net Weight kg 13.5 16
Gross Weight kg 16.5 19.5

5
Technical Information
Service Manual
The above data is subject to change without notice. Please refer to the nameplate of the unit.
Outdoor
Unit
Outdoor Unit Model LI018CO-160T432 LI024CO-160T432
Outdoor Unit Product Code Y6729 Y6731
Compressor Manufacturer ZHUHAI LANDA COMPRESSOR
CO.,LTD
ZHUHAI LANDA COMPRESSOR
CO., LTD
Compressor Model QXA-B141zF030A QXA-B141zF030A
Compressor Oil 68EP 68EP
Compressor Type Rotary Rotary
Compressor LRA. A 25 25.00
Compressor RLA A 7.2 7.20
Compressor Power Input W 1440 1440
Compressor Overload Protector 1NT11L-6233 11NT11L-6233/HPC 115/95/
KSD115ºC
Throttling Method Capillary Capillary
Set Temperature Range ºC 16~30 16~30
Cooling Operation Ambient Temperature
Range ºC 18~43 18~48
Heating Operation Ambient Temperature
Range ºC / /
Condenser Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Condenser Pipe Diameter mm Φ7 Φ7
Condenser Rows-n Gap mm 2-1.4 2-1.4
Condenser Coil Length (LXDXW) mm 812X38.1X550 821.5X38.1X660
Fan Motor Speed rpm 880 800/300
Fan Motor Power Output W 60 60
Fan Motor RLA A 0.5 0.58
Fan Motor Capacitor μF 3.5 3.5
Outdoor Unit Air Flow Volume m3/h 2000 3200
Fan Type Axial-ow Axial-ow
Fan Diameter mm Φ444.8 Ф520
Defrosting Method / /
Climate Type T1 T1
Isolation I I
Moisture Protection IP24 IP24
Permissible Excessive Operating Pressure
for the Discharge Side MPa 4.3 4.3
Permissible Excessive Operating Pressure
for the Suction Side MPa 2.5 2.5
Sound Pressure Level (H/M/L) dB (A) 54/-/- 56/-/-
Sound Power Level (H/M/L) dB (A) 64/-/- 68/-/-
Dimension(WXHXD) mm 899X596X378 965X700X396
Dimension of Carton Box (LXWXH) mm 945X417X630 1026X455X735
Dimension of Package(LXWXH) mm 948X420X645 1029X458X750
Net Weight kg 40 45
Gross Weight kg 43.5 50
Refrigerant R410A R410A
Refrigerant Charge kg 1.2 1.35
Connection
Pipe
Connection Pipe Length m 5 5
Connection Pipe Gas Additional Charge g/m 15 15
Outer Diameter Liquid Pipe mm Ф6 Ф6
Outer Diameter Gas Pipe mm Ф12 Ф16
Max Distance Height m 10 10
Max Distance Length m 25 25
Note: The connection pipe applies metric diameter.

6Technical Information
Service Manual
2.2 Operation Characteristic Curve
2.3 Capacity Variation Ratio According to Temperature
32 33 35 36 38 43
40 41 42
100
105
95
90
85
80
75
70
65
60
55
50
Conditions
Indoor:DB27°C/WB19°C
Indoor air flow:Super High
Pipe length:5m
Outdoor temp.(°C)
Capacity ratio (%)
Capacity ratio
(
%)
157-7 -5 02 24
0
20
40
60
80
100
120
-10510
Outdoor Temp.(°C)
Condition Heating
Indoor:DB2
0
°C
Indoor air flow: Super High
Pipe length:5
m
01020304050607
090010 20 30 40 50 60 70 80 90 100 120110
80
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (r
ps)
)A(tnerruC
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (
rps)
)A(tnerruC
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB27°C/WB19°C
Outdoor: DB35°C/WB24°C
Indoor air flow: High
Pipe length: 5m
Conditions
Indoor: DB20°C/WB15°C
Outdoor: DB7°C/WB6°C
Indoor air flow: High
Pipe length: 5m
0
1
2
3
4
5
6
7
8
9
10
020406080100 120
Condition
Indoor:DB 27°C
WB19 °C
Indoor air flow: Super High
Pipe length:5m
Voltage:230V
Compressor Speed(rps)
0
1
2
3
4
5
6
7
8
020406080 100 120
Condition
Indoor:DB 20°C
Indoor air flow: Super High
Pipe length:5 m
Voltage:230V
Compressor Speed(rps)
Current(A)
Current(A)
LI009CI-160T432 / LI009CO-160T432;LI012CI-160T432 / LI012CO-160T432
LI018CI-160T432 / LI018CO-160T432;LI024CI-160T432 / LI024CO-160T432

7
Technical Information
Service Manual
2.4 Cooling and Heating Data Sheet in Rated Frequency
Rated cooling
condition(°C)
(DB/WB) Model
Pressure of gas pipe
connecting indoor and
outdoor unit
Inlet and outlet pipe
temperature of heat
exchanger
Fan speed of
indoor unit
Fan speed of
outdoor unit
Compressor
frequency
(Hz)
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
27/19 35/24
LI009CI-160T432 / LI009CO-160T432
LI012CI-160T432 / LI012CO-160T432 0.9 to 1.1 12 to 14 75 to 37 Super High High
52
LI018CI-160T432 / LI018CO-160T432
LI024CI-160T432 / LI024CO-160T432 72
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.
Cooling:
2.5 Noise Curve
Indoor fan motor rotating speed Compressor frequency(Hz)
50
60
30
40
20
Low Middle High Super High
30
35
40
45
50
55
60
65
70
20 4030 50 60 70 80 90
Noise dB(A)
LI009CI-160T432 / LI009CO-160T432 LI018CI-160T432 / LI018CO-160T432
LI012CI-160T432 / LI012CO-160T432 LI024CI-160T432 / LI024CO-160T432
Indoor side noise Outdoor side noise

8Technical Information
Service Manual
3. Outline Dimension Diagram
3.1 Indoor Unit
Model W H D
LI009CI-160T432 790 275 200
LI012CI-160T432 845 289 209
LI018CI-160T432 970 300 224
LI024CI-160T432 1078 325 246
Unit:mm
W
D
H
90
150
54
168.5 462 159.5
Φ55 Φ55
54
123.5 541.6 179.9
83.2
124.7
35
Φ55 Φ55
35
104685 181
140
190
38
Φ55 Φ55
38
79
154
43
206 685 187
Φ70 Φ70
43
LI009CI-160T432
LI012CI-160T432
LI018CI-160T432
LI024CI-160T432

9
Technical Information
Service Manual
3.2 Outdoor Unit
Unit:mm
Unit:mm
710
658
470
299
275
550
318
LI009CO-160T432 LI012CO-160T432
LI018CO-160T432
899
818
596
378
303
343
550
LI009CI-160T432
LI012CI-160T432
LI018CI-160T432
LI024CI-160T432

10 Technical Information
Service Manual
364
560
700
396
340
965
897
LI024CO-160T432
Unit:mm

11
Technical Information
Service Manual
4. Refrigerant System Diagram
Connection pipe specication:
Liquid pipe:1/4" (6mm)
Gas pipe:3/8" (9.52mm)(LI009CI-160T432 / LI009CO-160T432;LI012CI-160T432 / LI012CO-160T432)
Gas pipe:1/2" (12mm)(LI018CI-160T432 / LI018CO-160T432)
Gas pipe:5/8" (16mm)(LI024CI-160T432 / LI024CO-160T432)
Indoor unit Outdoor unit
Accumlator
COOLING
Discharge
Suction
Heat
exchanger
(evaporator)
Heat
exchanger
(condenser)
Valve
Valve
Liquid pipe
side
Gas pipe
side
Compressor
Strainer
Capillary
Cooling model

12 Technical Information
Service Manual
5. Electrical Part
5.1 Wiring Diagram
● Indoor Unit
● Instruction
Symbol Symbol Color Symbol Symbol Color Symbol Name
WH White GN Green CAP Jumper cap
YE Yellow BN Brown COMP Compressor
RD Red BU Blue Grounding wire
YEGN Yellow/Green BK Black / /
VT Violet OG Orange / /
Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model.
LI009CI-160T432 LI012CI-160T432
L
L
θ
AP1
3
2
N(1)
OUTDOOR UNIT
L
N
POWER
BU(WH)
BN(BK)
YEGN(GN)
YEGN
YEGN
PE
EVAPORATOR
BK
BU
XT
BU
BK
CABLE
C0NNECTING
BLOCK
TERMINAL
N1
AC-L
L-OUT
CAP
JUMP
PRINTED CIRCUIT BOARD
AP2
K1
DISP2
DISP1
RT1 RT2
DISPLAY BOARD
RECEIVER AND
TUBE TEMP.
SENSOR
T-SENSOR
ROOM TEMP.
DISPLAY
θ
MOTOR
STEPPING
M2
SWING-UD
SENSOR
COM-OUT BN
M1
FAN MOTOR
PGF
PG
BN

13
Technical Information
Service Manual
LI018CI-160T432 LI024CI-160T432
θ
θ
DISP1 DISP2
COM-OUT
L-OUT
AC-L
K1
SWING-UD PGFPG
HEALTH-L HEALTH-N
CAP
JUMP
MOTOR MOTOR
GENERATOR
RD BU
EVAPORATOR
XT
4YEGN
3BN
2BK
1BU
L
BU
BN
YEGN
TERMINAL
N
POWER
OUTDOOR UNIT
COLD PLASMA
FAN
SWING
MAIN BOARD
AP2
RECEIVER AND
DISPLAY BOARD
BLOCK
L
N(1)
2
3
BK
BN
YEGN
PE
AP1:
M2 M1
N1
BU
OPTIONAL
L
SENSOR
SENSOR
T-SENSOR
RT1
RT2
ROOM
TEMP.
TEMP.
TUBE

14 Technical Information
Service Manual
● Outdoor Unit
LI009CO-160T432 LI012CO-160T432
LI018CO-160T432 LI024CO-160T432
YEGN
of electric shock !
Please don't touch any
terminal when the machine is
running ,stopping or has been
powered off for less than 30
minutes to prevent the risk
WARNING
L4
YEGN
COMU
N
AC-L
PE
L4
L4
PE
XT
YEGN
BN
BK
BU
3
2
N(1)
INDOOR UNIT
L2
TERMINAL
BLOCK
L2
BU
BK
BN
L2 L4 AP:Main Board
θ
θ
θ
SENSOR
SENSOR
SENSOR
TEMP.
RT1RT2RT3
OUTTUBE
TEMP.
OUTROOM
TEMP.
EXHAUST
CN2
L3 L3
REACTOR
L
LX1-1
BU BN
LX1-2
PE
PE
YEGN
YEGN
SHEET
BOX
MID.ISOLATION
ELECTRICAL
E
L1
BU
L1
L1
W
V
U
RD
YE
BU YE RD
COMP.
COMP
W
V
U
X1
SAT
OVC-COMP
OVERLOARD
PROTECTOR
RD
PE
PE
YEGN
FAN MOTOR
M
OFAN
ground only
iron shell motor.
applies to the
Motor
NOTE:
These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.
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15
Technical Information
Service Manual
5.2 PCB Printed Diagram
Indoor Unit
● Top view
● Bottom view
No. Name
1Interface of compressor
control
2Live wire interface of power
supply
3Communication wire
4Fuse
5Indoor fan driven capacitor
6Neutral wire interface of cold
plasma
7Neutral wire interface of
power supply
8Interface of indoor fan
9Live wire interface of cold
plasma
10 Interface of up & down swing
motor
11 Interface of indoor fan
feedback
12 Jumper cap
13 Interface of left & right motor
14 Interface of dry-contact
15 Live wire interface of
16 The cap of bridle wire pin of
simple wired controller
17 Interface of display
1
2
3
4
5
6
78
910
14
11
12
13
15
17
16

16 Technical Information
Service Manual
● Top view
Outdoor Unit
● Bottom view
No. Name
1 Terminal of compressor wire
2 Reactor interface 1
3 Reactor interface 2
4Fan interface
54-way valve sub-assy
6Neutral wire of power supply
7Live wire of power supply
8Communication wire
9Overload input
10 Temperature sensor interface
1
2
3
4 5
6
7
8
9 10
LI009CO-160T432 LI012CO-160T432

17
Technical Information
Service Manual
1234567
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9
10
11
12
13
● Top view
● Bottom view
No. Name
1Terminal of compressor
wire
2Terminal of low pressure
protection
3Terminal of compressor
overload protection
4Terminal of outdoor
temperature sensor
5Terminal of electronic
expansion valve
6Terminal of outdoor fan
7Terminal of 4-way valve
8Terminal of chassis
electric heating
9Wiring terminal of
chassis electric heating
10 Power supply live wire
11 Earthing wire
12 Power supply neutral
wire
13 PFC induction wire
LI018CO-160T432 LI024CO-160T432