Lennox LI012CI-180P432 User manual

Thank you for selecting LENNOX air conditioners.
Service Manual
Models: LI012CI-180P432 LI012CO-180P432
LI012HI-180P432 LI012HO-180P432
LI024CI-180P432 LI024CO-180P432
LI024HI-180P432 LI024HO-180P432
(Refrigerant R410A)

Service Manual
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........................................................................9
3.1 Indoor Unit........................................................................................................................9
3.2 Outdoor Unit ...................................................................................................................10
4. Refrigerant System Diagram....................................................................11
5. Electrical Part.........................................................................................................13
5.1 Wiring Diagram...............................................................................................................13
5.2 PCB Printed Diagram .....................................................................................................16
6. Function and Control......................................................................................19
6.1 Remote Controller Introduction .....................................................................................19
6.2 Brief Description of Modes and Functions......................................................................23
Part Ⅱ: Installation and Maintenance .................................................32
7. Notes for Installation and Maintenance..........................................32
8. Installation................................................................................................................35
8.1 Installation Dimension Diagram......................................................................................35
8.2 Installation Parts-checking ............................................................................................37
8.3 Selection of Installation Location....................................................................................37
8.4 Requirements for Electric Connection ...........................................................................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
Table of Contents

Service Manual
9. Maintenance............................................................................................................42
9.1 Error Code List ...............................................................................................................42
9.2 Troubleshooting for Main Malfunction ............................................................................43
9.3 Troubleshooting for Normal Malfunction.........................................................................58
10. Exploded View and Parts List ..............................................................60
10.1 Indoor Unit....................................................................................................................60
10.2 Outdoor Unit .................................................................................................................64
11. Removal Procedure.......................................................................................72
11.1 Removal Procedure of Indoor Unit ...............................................................................72
11.2 Removal Procedure of Outdoor Unit ............................................................................82
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
Table of Contents

1
Technical Information
Service Manual
1. Summary
Part Ⅰ: Technical Information
Indoor Unit
LI012CI-180P432
LI012HI-180P432
LI024CI-180P432
LI024HI-180P432
Outdoor Unit
LI012CO-180P432
LI012HO-180P432
LI024CO-180P432
LI024HO-180P432
Remote Controller
YAA1FB

2Technical Information
Service Manual
Model LI012CI-180P432
LI012CO-180P432
LI012HI-180P432
LI012HO-180P432
Product Code Y8369/Y8370 Y8381/Y8382
Power Supply
Rated Voltage V~ 208/230 208/230
Rated Frequency Hz 60 60
Phases 1 1
Power Supply Mode Outdoor Outdoor
Cooling Capacity(Min~Max) Btu/h 12000(3753~12500) 12000(3753~12500)
Heating Capacity(Min~Max) Btu/h / 13000(3924~14000)
Cooling Power Input(Min~Max) W 1150(410~1350) 1150(410~1350)
Heating Power Input(Min~Max) W / 1250(380~1500)
Cooling Power Current A 5.1 5.1
Heating Power Current A / 5.55
Rated Input W 1350 1500
Rated Current A 6.0 6.88
Air Flow Volume(SH/H/M/L) CFM 400/318/253/194 400/318/253/194
Dehumidifying Volume Pint/h 2.96 2.96
EER (Btu/h)/W 10.43 10.43
COP (Btu/h)/W / 10.4
SEER 18.00 18.00
HSPF / 9.00
Application Area yd219.14-28.70 19.14-28.70
Indoor Unit
Model of indoor unit LI012CI-180P432 LI012HI-180P432
Indoor Unit Product Code Y8369 Y8381
Fan Type Cross-ow Cross-ow
Diameter Length(DXL) inch Φ3 7/8X25 Φ3 7/8X25
Fan Motor Cooling Speed(SH/H/M/L) r/min 1350/1200/1000/800 1350/1200/1000/800
Fan Motor Heating Speed(SH/H/M/L) r/min / 1350/1200/1000/900
Output of Fan Motor W 20 20
Fan Motor RLA A 0.31 0.31
Fan Motor Capacitor μF 1.5 1.5
Evaporator Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter inch Φ3/16 Φ3/16
Row-n Gap inch 2-1/16 2-1/16
Coil Length (LXDXW) inch 25X7/8X12 1/16 25X7/8X12 1/16
Swing Motor Model MP24BA MP24BA
Output of Swing Motor W 1.5 1.5
Fuse A 3.15 3.15
Sound Pressure Level(SH/H/M/L) dB (A) 43/39/35/29 43/39/35/29
Sound Power Level(SH/H/M/L) dB (A) 53/49/45/39 53/49/45/39
Dimension (WXHXD) inch 33 1/4X11 3/8X8 1/4 33 1/4X11 3/8X8 1/4
Dimension of Carton Box (LXWXH) inch 36 1/8X11X14 5/16 36 1/8X11X14 5/16
Dimension of Package (LXWXH) inch 36 1/4X11X15 36 1/4X11X15
Net Weight Ib 23.15 23.15
Gross Weight Ib 27.56 27.56
2. Specications
2.1 Specication Sheet

3
Technical Information
Service Manual
Outdoor Unit
Model of Outdoor Unit LI012CO-180P432 LI012HO-180P432
Outdoor Unit Product Code Y8370 Y8382
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR
CO,LTD.
ZHUHAI LANDA COMPRESSOR
CO,LTD.
Compressor Model QXA-B102zE190 QXA-B102zE190
Compressor Oil RB68EP RB68EP
Compressor Type Rotary Rotary
Compressor Locked Rotor Amp (L.R.A) A / /
Compressor RLA A 6.6 6.6
Compressor Power Input W 1020 1020
Overload Protector 1NT11L-6233 or HPC115/95U1 or
KSD115℃
1NT11L-6233 or HPC115/95U1 or
KSD115℃
Throttling Method Electron expansion valve Electron expansion valve
Operation temp ºF 60.8~86 60.8~86
Ambient temp (cooling) ºF 0~115 0~115
Ambient temp (heating) ºF / -4~75
Condenser Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter inch Φ5/16 Φ5/16
Rows-n Gap inch 2-1/16 2-1/16
Coil Length (LXDXW) inch 28X1 1/2X20 28X1 1/2X20
Fan Motor Speed rpm 900 900
Output of Fan Motor W 30 30
Fan Motor RLA A 0.37 0.37
Fan Motor Capacitor μF / /
Air Flow Volume of Outdoor Unit CFM 1600 1600
Fan Type Axial-ow Axial-ow
Fan Diameter inch Φ15 3/4 Φ15 3/4
Defrosting Method /Automatic Defrosting
Climate Type T1 T1
Isolation I I
Moisture Protection IPX4 IPX4
Permissible Excessive Operating
Pressure for the Discharge Side PSIG 550 550
Permissible Excessive Operating
Pressure for the Suction Side PSIG 240 240
Sound Pressure Level (H/M/L) dB (A) 53/-/- 53/-/-
Sound Power Level (H/M/L) dB (A) 63/-/- 63/-/-
Dimension (WXHXD) inch 30 9/16X21 1/4X12 5/8 30 9/16X21 1/4X12 5/8
Dimension of Carton Box (LXWXH) inch 32 9/32X13 63/64X22 27/32 32 9/32X13 63/64X22 27/32
Dimension of Package (LXWXH) inch 32 13/32X14 3/32X23 27/64 32 13/32X14 3/32X23 27/64
Net Weight Ib 67.24 69.45
Gross Weight Ib 72.75 74.96
Refrigerant R410A R410A
Refrigerant Charge oz 31.8 31.8
Connection
Pipe
Length ft 24.6 24.6
Gas Additional Charge oz/ft 0.2 0.2
Outer Diameter Liquid Pipe inch Φ1/4 Φ1/4
Outer Diameter Gas Pipe inch Φ3/8 Φ3/8
Max Distance Height ft 32.8 32.8
Max Distance Length ft 49.2 49.2
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
Model LI024CI-180P432
LI024CO-180P432
LI024HI-180P432
LI024HO-180P432
Product Code Y8373/Y8374 Y8385/Y8386
Power Supply
Rated Voltage V~ 208/230 208/230
Rated Frequency Hz 60 60
Phases 1 1
Power Supply Mode Outdoor Outdoor
Cooling Capacity(Min~Max) Btu/h 22000(8630~23200) 22000(8630~23200)
Heating Capacity(Min~Max) Btu/h / 24000(8650~26000)
Cooling Power Input(Min~Max) W 2260(600~27000) 2260(600~27000)
Heating Power Input(Min~Max) W / 2300(610~2750)
Cooling Power Current A 10.03 10.03
Heating Power Current A / 10.20
Rated Input W 2700 2750
Rated Current A 11.98 11.98
Air Flow Volume(SH/H/M/L) CFM 1200/1050/900/750 1200/1050/900/750
Dehumidifying Volume Pint/h 2.5 2.5
EER (Btu/h)/W 9.73 9.73
COP (Btu/h)/W / 10.40
SEER 18 18.00
HSPF / 10.00
Application Area yd232.29-50.23 32.29-50.23
Indoor Unit
Model of indoor unit LI024CI-180P432 LI024HI-180P432
Indoor Unit Product Code Y8373 Y8385
Fan Type Cross-ow Cross-ow
Diameter Length(DXL) inch Φ4 1/4X32 11/16 Φ4 1/4X32 11/16
Fan Motor Cooling Speed(SH/H/M/L) r/min 1300/1150/1000/850 1300/1150/1000/850
Fan Motor Heating Speed(SH/H/M/L) r/min / 1300/1150/1000/850
Output of Fan Motor W 30 30
Fan Motor RLA A 0.32 0.32
Fan Motor Capacitor μF 3 3
Evaporator Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter inch Φ5/16 Φ5/16
Row-n Gap inch 2-1/16 2-1/16
Coil Length (LXDXW) inch 33 1/4X1X13 1/2 33 1/4X1X13 1/2
Swing Motor Model MP35CJ MP35CJ
Output of Swing Motor W 2.5 2.5
Fuse A 3.15 3.15
Sound Pressure Level(SH/H//M/L) dB (A) 49/46/42/36 49/46/42/36
Sound Power Level(SH/H//M/L) dB (A) 59/56/52/46 59/56/52/46
Dimension (WXHXD) inch 42 7/16X12 13/16X9 11/16 42 7/16X12 13/16X9 11/16
Dimension of Carton Box (LXWXH) inch 45X16 1/8X13 3/16 45X16 1/8X13 3/16
Dimension of Package (LXWXH) inch 45 3/16X16 1/4X13 3/4 45 3/16X16 1/4X13 3/4
Net Weight Ib 38.58 38.58
Gross Weight Ib 45.19 45.19

5
Technical 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-180P432 LI024HO-180P432
Outdoor Unit Product Code Y8374 Y8386
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR
CO.,LTD
ZHUHAI LANDA COMPRESSOR
CO.,LTD
Compressor Model QXA-B141zF030A QXA-B141zF030A
Compressor Oil RB68EP RB68EP
Compressor Type Rotary Rotary
Compressor Locked Rotor Amp (L.R.A) A 25 25
Compressor RLA A 11.29 12.18
Compressor Power Input W 1440 1440
Overload Protector 1NT11L-6233 or KSD115℃or
HPC115/95U1
NT11L-6233 or KSD115℃or
HPC115/95U1
Throttling Method Electron expansion valve Electron expansion valve
Operation temp ºF 60.8~86 60.8~86
Ambient temp (cooling) ºF 0~115 0~115
Ambient temp (heating) ºF / -4~75
Condenser Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter inch Φ3/8 Φ3/8
Rows-n Gap inch 2-1/16 2-1/16
Coil Length (LXDXW) inch 33 5/16X1 3/4X26 33 5/16X1 3/4X26
Fan Motor Speed rpm 800 800
Output of Fan Motor W 60 60
Fan Motor RLA A 0.4 0.4
Fan Motor Capacitor μF / /
Air Flow Volume of Outdoor Unit CFM 3200 3200
Fan Type Axial-ow Axial-ow
Fan Diameter inch Φ20 1/2 Φ20 1/2
Defrosting Method / Automatic Defrosting
Climate Type T1 T1
Isolation I I
Moisture Protection IPX4 IPX4
Permissible Excessive Operating
Pressure for the Discharge Side ISPG 550 550
Permissible Excessive Operating
Pressure for the Suction Side ISPG 240 240
Sound Pressure Level (H/M/L) dB (A) 58/-/- 58/-/-
Sound Power Level (H/M/L) dB (A) 68/-/- 68/-/-
Dimension (WXHXD) inch 38X27 9/16X15 5/8 38X27 9/16X15 5/8
Dimension of Carton Box (LXWXH) inch 40 3/8X17 7/8X29 40 3/8X17 7/8X29
Dimension of Package (LXWXH) inch 40 1/2X18X29 1/2 40 1/2X18X29 1/2
Net Weight Ib 101.41 103.62
Gross Weight Ib 111.33 113.54
Refrigerant R410A R410A
Refrigerant Charge oz 56.4 56.4
Connection
Pipe
Length ft 24.6 24.6
Gas Additional Charge oz/ft 0.2 0.2
Outer Diameter Liquid Pipe inch Φ1/4 Φ1/4
Outer Diameter Gas Pipe inch Φ5/8 Φ5/8
Max Distance Height ft 32.8 32.8
Max Distance Length ft 82 82
Note:The connection pipe applies metric diameter.

6Technical Information
Service Manual
0
09070605040302010 1
10
210010908070605040302010
80
11
10
9
8
7
6
5
4
3
2
1
0
11
10
9
8
7
6
5
4
3
2
1
0
• Conditions
Indoor : DB80˚F/WB66.9˚F
Outdoor: DB95˚F
Indoor air flow : High
220V
230V
240V
220V
230V
240V
Current (A)
Current (A)
Compressor frequency(Hz) Compressor frequency(Hz)
89 91 93 95 97 99 100 102 109.45 14 23 32104 106 108
100
105
95
90
85
80
75
70
65
60
55
50
Outdoor temp. (˚F)
110
100
90
80
70
60
50
40
Outdoor temp. (˚F)
Capacity ratio (%) Capacity ratio (%)
Pipe lengt : 24.6ft
41 44.6 50
• Conditions
Indoor : DB70˚F/WB60˚F
Outdoor : DB19.94˚F/WB19.04˚F
Indoor air flow : High
Pipe lengt : 24.6ft
• Conditions
Indoor : DB70˚F/WB60˚
Outdoor : DB19.94˚F/WB19.04˚F
Indoor air flow : High
Pipe lengt : 24.6ft
• Conditions
Indoor : DB80˚F/WB66.9˚F
Outdoor: DB95˚F
Indoor air flow : High
Pipe lengt : 24.6ft
2.2 Operation Characteristic Curve
2.3 Capacity Variation Ratio According to Temperature
Cooling Heating
Cooling Heating
-4 514
110
100
90
80
70
60
50
40
23 32 41 50
Outdoor temp.(°F)
Capacity ratio (%)
89.6 91.4 93.295 96.8 98.6 100.4 102.2 109.4 104 105.8 107.6
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
70°F
Outdoor:DB19.94°F/WB19.04°F
Indoor air flow:Super High
Pipe length:
24.6ft

7
Technical Information
Service Manual
2.4 Cooling and Heating Data Sheet in Rated Frequency
2.5 Noise Curve
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:
Heating:
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
(rps)
Indoor Outdoor P (PSIG) T1 (°F) T2 (°F)
80/66.9 95/75
LI012CI-180P432
LI012CO-180P432 130~142 in:46.4~51.8
out:51.8~57.2
in:167~181.4
out:98.6~118.4 Super High High 72
80/66.9 95/75
LI024CI-180P432
LI024CO-180P432 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
Rated heating
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
(rps)
Indoor Outdoor P (PSIG) T1 (°F) T2 (°F)
70/60 19.94/19.04 LI012HI-180P432
LI012HO-180P432 362~406 in:167~181.4
out:98.6~113
in:33.8~37.4
out:35.6~42.8 Super High High 77
70/60 19.94/19.04 LI024HI-180P432
LI024HO-180P432 362~406 in:167~181.4
out:98.6~113
in:33.8~37.4
out:35.6~42.8 Super High High 80
Indoor side noise when blowing Outdoor side noise when blowing
Indoor fan motor rotating speed Compressor frequency(Hz)
Noise/dB(A)
50
60
30
40
20
Low Middle High Super High
40
42
44
46
48
50
52
54
56
20 4030 50 60 70 80
90
Noise dB(A)
Cooling
Heating
LI012CI-180P432 LI012CO-180P432
LI012HI-180P432 LI012HO-180P432

8Technical Information
Service Manual
20
30
40
50
LM HSH
Indoor fan motor rating speed
Noise/dB(A)
46
48
50
52
54
56
58
60
20 30 40 50 60 70 80 90
100
Compressor frequency(Hz)
Noise dB(A)
Heating
Cooling
Indoor side noise Outdoor side noise
LI024CI-180P432 LI024CO-180P432
LI024HI-180P432 LI024HO-180P432

9
Technical Information
Service Manual
3. Outline Dimension Diagram
3.1 Indoor Unit
W
D
H
Φ2 3/16 Φ2 3/16
4 11/1621 5/16 7 1/4
3 5/16
5
1 3/8 1 3/8
3 1/8
6
1 11/16
8 1/8 27 7 5/16
Φ2 3/4 Φ2 3/4
MODEL W H D
LI012CI-180P432 LI012CO-180P432
LI012HI-180P432 LI012HO-180P432 33 1/4 11 3/8 8 1/4
LI024CI-180P432 LI024CO-180P432
LI024HI-180P432 LI024HO-180P432 42 7/16 12 13/16 9 11/16
Unit:inch
LI012CI-180P432 LI012CO-180P432
LI012HI-180P432 LI012HO-180P432
LI024CI-180P432 LI024CO-180P432
LI024HI-180P432 LI024HO-180P432

10 Technical Information
Service Manual
Unit:inch
3.2 Outdoor Unit
30 9/16
21 1/4
12 5/8
28
11 1/4
20
10 1/8
LI024CO-180P432
LI024HO-180P432
Unit: inch
35
13 3/8
27 9/16
15 5/8
38
14 5/16
22

11
Technical Information
Service Manual
LI012CI-180P432 LI012CO-180P432
LI012HI-180P432 LI012HO-180P432
Connection pipe specication:
Liquid pipe:1/4"
Gas pipe:3/8"
Indoor unit Outdoor unit
COOLING
HEATING
4-Way valve
Discharge
Suction
Heat
exchanger
(evaporator) Heat
exchanger
(condenser)
Valve
Valve
Liquid pipe
side
Gas pipe
side
Strainer Electron
expansion
valve
Strainer
Accumlator
Compressor
Indoor unit Outdoor unit
Accumlator
COOLING
Discharge
Suction
Heat
exchanger
(evaporator)
Heat
exchanger
(condenser)
Valve
Valve
Liquid pipe
side
Gas pipe
side
Compressor
Strainer
Electron
expansion
valve
4. Refrigerant System Diagram

12 Technical Information
Service Manual
Indoor unit Outdoor unit
COOLING
HEATING
4-Way valve
Discharge
Suction
Heat
exchanger
(evaporator) Heat
exchanger
(condenser)
Valve
Valve
Liquid pipe
side
Gas pipe
side
Strainer Electron
expansion
valve
Strainer
Accumlator
Compressor
Indoor unit Outdoor unit
Accumlator
COOLING
Discharge
Suction
Heat
exchanger
(evaporator)
Heat
exchanger
(condenser)
Valve
Valve
Liquid pipe
side
Gas pipe
side
Compressor
Strainer
Electron
expansion
valve
LI024CI-180P432 LI024CO-180P432
LI024HI-180P432 LI024HO-180P432
Connection pipe specication:
Liquid pipe:1/4"
Gas pipe:1/2" for 18K
Gas pipe:5/8" for 24K

13
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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14 Technical Information
Service Manual
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LI012CO-180P432
LI012HO-180P432
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15
Technical Information
Service Manual
The above data is subject to change without notice. Please refer to the nameplate of the unit.
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16 Technical Information
Service Manual
5.2 PCB Printed Diagram
Indoor Unit
No Name
1Interface of communication wire for
indoor unit and outdoor unit
2Interface of live wire
3Interface of health function neutral
wire
4Interface of neutral wire
5 Interface of fan
6Interface of health function live wire
7Jumper cap
8Auto button
9 Up&down swing interface
10 Feedback interface of indoor unit
11 left&right swing interface
12 Interface of wi
13 Interface of tube temperature sensor
14 Wired controller
15 Display interface
16 Fuse
● Top view
● Bottom view
1
2
16
3 4 5 6 7 8 9 10
11
12
13
14
15

17
Technical Information
Service Manual
1Compressor UVW three phase
input interface
2 Interface of reactor
3 Interface of fan
44-way valve
5Interface of earthing wire
6Interface of live wire
7Interface of netural wire
8Interface of communication
9Interface of electronic expansion
valve
10 Overload interface of
compressor
11 Interface of temperature sensor
● Top view
● Bottom view
1
2
3 4
5
6
7
8
91011
LI012CO-180P432 LI012HO-180P432
Outdoor Unit