Lennox LI012CI-210P432 User manual

Thank you for selecting LENNOX air conditioners.
Service Manual
Models: LI012CI-210P432 / LI012CO-210P432
LI018CI-210P432 / LI018CO-210P432
LI024CI-210P432 / LI024CO-210P432
(Refrigerant:R410A)

Table of Contents
Service Manual
Table of Contents
Part Ⅰ: Technical Information.......................................................................1
1. Summary......................................................................................................................1
2. Specications..........................................................................................................3
2.1 Specication Sheet...........................................................................................................3
2.2 Operation Characteristic Curve ........................................................................................9
2.3 Cooling and Heating Data Sheet in Rated Frequency .....................................................9
2.4 Noise Curve....................................................................................................................10
3. Outline Dimension Diagram...................................................................... 11
3.1 Indoor Unit......................................................................................................................11
3.2 Outdoor Unit ...................................................................................................................12
4. Refrigerant System Diagram....................................................................14
5. Electrical Part.........................................................................................................15
5.1 Wiring Diagram...............................................................................................................15
5.2 PCB Printed Diagram .....................................................................................................18
6. Function and Control......................................................................................22
6.1 Remote Controller Introduction .....................................................................................22
6.2 Brief Description of Modes and Functions......................................................................26
Part Ⅱ: Installation and Maintenance .................................................31
7. Notes for Installation and Maintenance..........................................31
8. Installation................................................................................................................34
8.1 Installation Dimension Diagram......................................................................................34
8.2 Installation Parts-checking ............................................................................................36
8.3 Selection of Installation Location....................................................................................36
8.4 Requirements for electric connection .............................................................................36
8.5 Installation of Indoor Unit................................................................................................36
8.6 Installation of Outdoor Unit.............................................................................................39
8.7 Vacuum Pumping and Leak Detection ...........................................................................40
8.8 Check after Installation and Test operation ....................................................................40
9. Maintenance............................................................................................................41
9.1 Error Code List ...............................................................................................................41
9.2 Procedure of Troubleshooting ........................................................................................47
9.3 Troubleshooting for Normal Malfunction.........................................................................59

Table of Contents
Service Manual
10. Exploded View and Parts List ..............................................................61
10.1 Indoor Unit....................................................................................................................61
10.2 Outdoor Unit .................................................................................................................67
11. Removal Procedure.......................................................................................73
11.1 Removal Procedure of Indoor Unit ...............................................................................73
11.2 Removal Procedure of Outdoor Unit ............................................................................78
Appendix:........................................................................................................................92
Appendix 1: Reference Sheet of Celsius and Fahrenheit ....................................................92
Appendix 2: Conguration of Connection Pipe.....................................................................92
Appendix 3: Pipe expanding method....................................................................................93
Appendix 4: List of Resistance for Temperature Sensor ......................................................94

1
Technical Information
Service Manual
1. Summary
Indoor Unit:
Outdoor Unit:
Part Ⅰ: Technical Information
LI018CO-210P432
LI012CO-210P432
LI024CO-210P432
LI012CI-210P432
LI018CI-210P432
LI024CI-210P432
Remote Controller:
YAA1FB

2Technical Information
Service Manual
Models List:
No. Model Product Code Model Product Code Model Product Code
1LI012CI-210P432
LI012CO-210P432
18J03 LI012CI-210P432 LI012CO-210P432
2LI018CI-210P432
LI018CO-210P432 LI018CI-210P432 LI018CO-210P432
3LI024CI-210P432
LI024CO-210P432 LI024CI-210P432 LI024CO-210P432
18J04
18J05
18J06
18J07
18J08
18J03 18J04
18J05 18J06
18J07 18J08

3
Technical Information
Service Manual
Model LI012CI-210P432
LI012CO-210P432
Product Code 18J03 / 18J04
Power Supply
Rated Voltage V~ 208/230
Rated Frequency Hz 50/60
Phases 1
Power Supply Mode Outdoor
Cooling Capacity Btu/h 12000
Heating Capacity Btu/h /
Cooling Power Input W 1089
Heating Power Input W /
Cooling Power Current A 4.73
Heating Power Current A /
Rated Input W 1518
Rated Current A 6.6
Air Flow Volume(SH/H/M/ML/L) CFM 371/294/275/182/-
Dehumidifying Volume Pint/h 2.96
EER (Btu/h)/W 11.0
COP (Btu/h)/W /
SEER 20
HSPF /
Application Area yd219.1-28.7
Indoor Unit
Model of indoor unit LI012CI-210P432
Indoor Unit Product Code 18J03
Fan Type Cross-ow
Diameter Length(DXL) inch Φ3 55/64X25
Fan Motor Cooling Speed (SH/H/M/ML/L) r/min 1350/1200/1050/850
Fan Motor Heating Speed (SH/H/M/ML/L) r/min /
Output of Fan Motor W 20
Fan Motor RLA A 0.31
Fan Motor Capacitor μF 1.5
Evaporator Form Aluminum Fin-copper Tube
Pipe Diameter inch Φ3/16
Row-n Gap inch 2-1/16
Coil Length (LXDXW) inch 25X7/8X12 1/16
Swing Motor Model MP24HF
Output of Swing Motor W 1.5
Fuse A 3.15
Sound Pressure Level(SH/H/M/ML/L) dB (A) 42/39/34/28/-
Sound Power Level (SH/H/M/ML/L) dB (A) 52/49/44/38/-
Dimension (WXHXD) inch 35 13/64X11 1/2X8 21/64
Dimension of Carton Box (LXWXH) inch 37 1/8X13 3/4X11
Dimension of Package (LXWXH) inch 37 21/64X14 3/8X11 3/8
Net Weight Ib 23.2
Gross Weight Ib 27.6
2. Specications
2.1 Specication Sheet

4Technical Information
Service Manual
The above data is subject to change without notice; please refer to the nameplate of the unit.
Outdoor Unit
Model of Outdoor Unit LI012CO-210P432
Outdoor Unit Product Code 18J04
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO., LTD
Compressor Model QXF-A102zE190B
Compressor Oil FW68DA
Compressor Type Rotary
Compressor L.R.A. A /
Compressor RLA 6.6
Compressor Power Input W 1023
Overload Protector HPC115/95U1/KSD115ºC
Throttling Method Electron expansion valve
Operation temp ºF 61~86
Ambient temp (cooling) ºF -4~115
Ambient temp (heating) ºF /
Condenser Form Aluminum Fin-copper Tube
Pipe Diameter inch Φ3/8
Rows-n Gap inch 2-1/16
Coil Length (LXDXW) inch 29 13/32 X1 3/4X20
Fan Motor Speed rpm 900
Output of Fan Motor W 30
Fan Motor RLA A 0.37
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit CFM 1295
Fan Type Axial-ow
Fan Diameter inch Φ17 1/4
Defrosting Method Automatic Defrosting
Climate Type T1
Isolation I
Moisture Protection IPX4
Design Pressure(High) PSIG 550
Design Pressure(Low) PSIG 240
Sound Pressure Level (H/M/L) dB (A) 52/-/-
Sound Power Level (H/M/L) dB (A) 62/-/-
Dimension (WXHXD) inch 33 13/32X21 1/4X12 19/32
Dimension of Carton Box (LXWXH) inch 34 37/64X14 1/6X22 5/6
Dimension of Package (LXWXH) inch 34 43/64X14 9/32X23 27/64
Net Weight Ib 70.6
Gross Weight Ib 77.2
Refrigerant R410A
Refrigerant Charge oz 34.2
Connection
Pipe
Length ft 24.6
Gas Additional Charge oz/ft 0.2
Outer Diameter Liquid Pipe inch 1/4
Outer Diameter Gas Pipe inch 3/8
Max Distance Height ft 32.8
Max Distance Length ft 49.2
Note:The connection pipe applies metric diameter.

5
Technical Information
Service Manual
Model LI018CI-210P432
LI018CO-210P432
Product Code 18J05 / 18J06
Power Supply
Rated Voltage V~ 208/230
Rated Frequency Hz 60
Phases 1
Power Supply Mode Outdoor
Cooling Capacity Btu/h 17400
Heating Capacity Btu/h /
Cooling Power Input W 1730
Heating Power Input W /
Cooling Power Current A 7.1
Heating Power Current A /
Rated Input W 2000
Rated Current A 10.5
Air Flow Volume(SH/H/M/ML/L) CFM 530/441/412/335/-
Dehumidifying Volume Pint/h 3.8
EER (Btu/h)/W 10.1
COP (Btu/h)/W /
SEER 20
HSPF /
Application Area yd227.5-40.7
Indoor Unit
Model of indoor unit LI018CI-210P432
Indoor Unit Product Code 18J05
Fan Type Cross-ow
Diameter Length(DXL) inch Φ4 3/16X27 13/16
Fan Motor Cooling Speed (SH/H/M/ML/L) r/min 1400/1200/1050/800/-
Fan Motor Heating Speed (SH/H/M/ML/L) r/min /
Output of Fan Motor W 60
Fan Motor RLA A 0.3
Fan Motor Capacitor μF /
Evaporator Form Aluminum Fin-copper Tube
Pipe Diameter inch Φ 9/32
Row-n Gap inch 2-1/18
Coil Length (LXDXW) inch 28 1/6X1X12
Swing Motor Model MP35CJ
Output of Swing Motor W 2.5
Fuse A 3.15
Sound Pressure Level(SH/H/M/ML/L) dB (A) 47/42/38/31/-
Sound Power Level (SH/H/M/ML/L) dB (A) 57/52/48/41/-
Dimension (WXHXD) inch 40X12X8 45/64
Dimension of Carton Box (LXWXH) inch 42 13/32X14 13/16X11 13/16
Dimension of Package (LXWXH) inch 35 13/32X14 29/32X1213/32
Net Weight Ib 29.8
Gross Weight Ib 36.4

6Technical Information
Service Manual
The above data is subject to change without notice; please refer to the nameplate of the unit.
Outdoor Unit
Model of Outdoor Unit LI018CO-210P432
Outdoor Unit Product Code 18J06
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO. LTD.
Compressor Model QXF-A102zE190B
Compressor Oil FW68DA
Compressor Type Rotary
Compressor L.R.A. A 25
Compressor RLA 8.5
Compressor Power Input W 1023
Overload Protector HPC115/95U1/KSD115ºC
Throttling Method Electron expansion valve
Operation temp ºF 61~86
Ambient temp (cooling) ºF -4~115
Ambient temp (heating) ºF /
Condenser Form Aluminum Fin-copper Tube
Pipe Diameter inch Φ3/8
Rows-n Gap inch 2-1/18
Coil Length (LXDXW) inch 28 9/10X1 1/2X21 7/10
Fan Motor Speed rpm 880
Output of Fan Motor W 40
Fan Motor RLA A 0.62
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit CFM 1412
Fan Type Axial-ow
Fan Diameter inch Φ17 1/4
Defrosting Method /
Climate Type T1
Isolation I
Moisture Protection IPX4
Design Pressure(High) PSIG 550
Design Pressure(Low) PSIG 240
Sound Pressure Level (H/M/L) dB (A) 52/-/-
Sound Power Level (H/M/L) dB (A) 62/-/-
Dimension (WXHXD) inch 35 3/8X23 1/2X14 7/8
Dimension of Carton Box (LXWXH) inch 37 3/16X16 7/16X24 13/16
Dimension of Package (LXWXH) inch 37 5/16X16 9/16X25 3/8
Net Weight Ib 80.5
Gross Weight Ib 87.1
Refrigerant R410A
Refrigerant Charge oz 37
Connection
Pipe
Length ft 24.6
Gas Additional Charge oz/ft 0.2
Outer Diameter Liquid Pipe inch 1/4
Outer Diameter Gas Pipe inch 1/2
Max Distance Height ft 50
Max Distance Length ft 100
Note:The connection pipe applies metric diameter.

18J07
7
Technical Information
Service Manual
Model LI024CI-210P432
LI024CO-210P432
Product Code 18J07 / 18J08
Power Supply
Rated Voltage V~ 208/230
Rated Frequency Hz 60
Phases 1
Power Supply Mode Outdoor
Cooling Capacity Btu/h 22000
Heating Capacity Btu/h /
Cooling Power Input W 1870
Heating Power Input W /
Cooling Power Current A 8
Heating Power Current A /
Rated Input W 2860
Rated Current A 12.5
Air Flow Volume(SH/H/M/L) CFM 765/677/589/500/-
Dehumidifying Volume Pint/h 4.23
EER (Btu/h)/W 11.76
COP (Btu/h)/W /
SEER 19
HSPF /
Application Area yd232.29-50.23
Indoor Unit
Model of indoor unit LI024CI-210P432
Indoor Unit Product Code
Fan Type Cross-ow
Diameter Length(DXL) inch Φ4 1/4X32 11/16
Fan Motor Cooling Speed(SH/H/M/L) r/min 1300/1150/1000/850/-
Fan Motor Heating Speed(SH/H/M/L) r/min /
Output of Fan Motor W 30
Fan Motor RLA A 0.32
Fan Motor Capacitor μF 3
Evaporator Form Aluminum Fin-copper Tube
Pipe Diameter inch Φ5/16
Row-n Gap inch 2-1/16
Coil Length (LXDXW) inch 33 1/4X1X13 1/2
Swing Motor Model MP35CJ
Output of Swing Motor W 2.5
Fuse A 3.15
Sound Pressure Level (SH/H/M/L) dB (A) 49/45/41/37
Sound Power Level (SH/H/M/L) dB (A) 59/55/51/47
Dimension (WXHXD) inch 44 43/64X13X9 23/32
Dimension of Carton Box (LXWXH) inch 44 55/64X16X13 1/64
Dimension of Package (LXWXH) inch 47X16 1/16X13 25/32
Net Weight Ib 36.4
Gross Weight Ib 44.1

8Technical Information
Service Manual
The above data is subject to change without notice; please refer to the nameplate of the unit.
Outdoor Unit
Model of Outdoor Unit LI024CO-210P432
Outdoor Unit Product Code 18J08
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO., LTD
Compressor Model QXFS-D25zX090H
Compressor Oil FW68DA
Compressor Type Rotary
Compressor L.R.A. A 24
Compressor RLA 13
Compressor Power Input W 2420
Overload Protector HPC115/95U1/KSD115ºC
Throttling Method Electron expansion valve
Operation temp ºF 61~86
Ambient temp (cooling) ºF -4~115
Ambient temp (heating) ºF /
Condenser Form Aluminum Fin-copper Tube
Pipe Diameter inch Φ3/8
Rows-n Gap inch 2-1/16
Coil Length (LXDXW) inch 33 5/16X1 3/4X26
Fan Motor Speed rpm 800
Output of Fan Motor W 60
Fan Motor RLA A 0.4
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit CFM 1883
Fan Type Axial-ow
Fan Diameter inch Φ20 1/2
Defrosting Method /
Climate Type T1
Isolation I
Moisture Protection IPX4
Design Pressure(High) PSIG 550
Design Pressure(Low) PSIG 240
Sound Pressure Level (H/M/L) dB (A) 57/-/-
Sound Power Level (H/M/L) dB (A) 67/-/-
Dimension (WXHXD) inch 38X27 9/16X15 5/8
Dimension of Carton Box (LXWXH) inch 40 3/8X17 7/8X29
Dimension of Package (LXWXH) inch 40 1/2X18X29 1/2
Net Weight Ib 119.1
Gross Weight Ib 129
Refrigerant R410A
Refrigerant Charge oz 63.504
Connection
Pipe
Length ft 24.6
Gas Additional Charge oz/ft 0.2
Outer Diameter Liquid Pipe inch 1/4
Outer Diameter Gas Pipe inch 5/8
Max Distance Height ft 65.6
Max Distance Length ft 100.1
Note:The connection pipe applies metric diameter.

9
Technical Information
Service Manual
2.2 Operation Characteristic Curve
gnilooC
Outdoor temp.(°C)
gnitaeH
Capacity ratio(
%)
Outdoor temp.(°C)
0
20
40
60
80
100
120
140
-13-45 14 23 32 41 50 59 68 75.2
95 97 99 101 103 105 107 109 115 104 111 113
100
105
95
90
85
80
75
70
65
60
55
50
Outdoor temp.(°F)
Capacity ratio (%)
Conditions
Indoor:DB 80°F /WB66.9 °F
Outdoor:DB95°F
Indoor air flow:Super High
Pipe length:
24.6ft
Conditions
Indoor:DB 80°F /WB66.9 °F
Outdoor:DB95°F
Indoor air flow:Super High
Pipe length:
24.6ft
2.3 Cooling and Heating Data Sheet in Rated Frequency
Rated cooling
condition(°F) (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
revolution
(Hz)
Indoor Outdoor PSIG T1 (°F) T2 (°F)
81/66 95/75 09/12K 123.2~145 in:46~52
out:52~57
in:122~176
out:99~109 Suprt High High 58
81/66 95/75 18/24K 130~142 in:46.4~51.8
out:51.8~57.2
in:167~181.4
out:98.6~118.4 Super High High 75
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: 24.6ft.
Cooling:

10 Technical Information
Service Manual
2.4 Noise Curve
Outdoor side noise
20
30
40
50
LM HSH
Indoor fan motor rating speed
Noise/dB(A)
Indoor side noise
40
45
50
55
60
65
70
75
20 30 40 50 60 70 80 90 100
Compressor frequency(Hz)
Noise dB(A)
LI012CI-210P432,LI012CO-210P432
LI018CI-210P432,LI018CO-210P432
LI024CI-210P432,LI024CO-210P432
20
30
40
50
LM H
LI024CI-210P432
LI018CI-210P432
SH
Indoor fan motor rating speed
Noise/dB(A)
40
45
50
55
60
65
70
75
20 30 40 50 60 70 80 90 100
Compressor frequency(Hz)
Noise dB(A)
LI024CO-210P432
LI018CO-210P432
Indoor side noise Outdoor side noise

11
Technical Information
Service Manual
3. Outline Dimension Diagram
3.1 Indoor Unit
Unit:inch
Models W H D W1 W2 W3
LI012CI-210P432 35 13/64 11 1/2 8 21/64 8 1/64 21 21/64 5 27/32
LI018CI-210P432 40 12 8 45/64 5 27 8 1/16
LI024CI-210P432 44 43/64 13 9 23/32 8 31/64 26 31/32 9 15/64
3
1 3/8
Φ2 3/16
W3W2
W1
Φ2 3/16
1 3/8
3
Φ2 3/4 Φ2 3/4
W
D
H

12 Technical Information
Service Manual
3.2 Outdoor Unit
35 3/8
32 3/16
21 2/3
13 1/2
12
23 1/2
14 7/8
Unit:inch
Unit: inch
35
13 3/8
27 9/16
15 5/8
38
14 5/16
22
LI018CO-210P432
LI024CO-210P432

13
Technical Information
Service Manual
LI012CO-210P432
23 19/64
33 25/64
11 1/4
30 10
12 19/32
23 19/64
Unit:inch

14 Technical Information
Service Manual
4. Refrigerant System Diagram
Indoor unit Outdoor unit
Accumlator
Discharge
Suction
Heat
exchanger
(evaporator)
Heat
exchanger
(condenser)
Valve
Valve
Liquid pipe
side
Gas pipe
side
Strainer
Capillary
Compressor
Electron
expansion
valve
Connection pipe specication:
Liquid pipe:1/4"
Gas pipe:5/8" LI024CI-210P432,LI024CO-210P432
Gas pipe:1/2" LI018CI-210P432,LI018CO-210P432
Gas pipe:3/8" LI012CI-210P432,LI012CO-210P432

15
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.
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Technical Information
Service Manual
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These wiring diagrams are subject to change without notice; please refer to the one supplied with the unit.