Saturn ATSCV4C4T18 Heat Pump Air Conditioner System User Manual

: June 1, 2024
: saturn

Table of Contents

ATSCV4C4T18 Heat Pump Air Conditioner System
Specifications
Outdoor Units
Engineering Data
- Product Usage Instructions
Installation
Operation
Maintenance
- FAQ
Q: How often should I clean the air filters?
Q: What should I do if the unit stops cooling/heating?

ATSCV4C4T18 Heat Pump Air Conditioner System

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Specifications

Outdoor Units

Model: ATSCV4C4T18
Outdoor power supply: 208/230V, 1 Ph, 60Hz
Capacity: 17500 Btu/h (1550 W)
Cooling Input: 11.7 W
EER2: 14.3
SEER2 (AHRI Certified): 14.3
Heating Capacity: –
HSPF2 (AHRI Certified): –
Max. input consumption: –
Max. current: –
Brand: LG

Engineering Data

Product Usage Instructions

Installation

1. Ensure proper electrical supply and grounding before
installation.

2. Mount the outdoor unit on a stable platform with proper
clearance for airflow.

Operation

1. Turn on the unit using the remote control or the control
panel on the indoor unit.

2. Set the desired temperature and fan speed for optimal
comfort.

Maintenance

1. Regularly clean or replace air filters as per the maintenance
schedule.

2. Check for any blockages in the outdoor unit and remove debris
to ensure proper airflow.

FAQ

Q: How often should I clean the air filters?

A: It is recommended to clean or replace the air filters every
1-2 months depending on usage.

Q: What should I do if the unit stops cooling/heating?

A: Check the circuit breaker, air filters, and outdoor unit for
any issues. If problems persist, contact a professional
technician.

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Service Manual
2023.3

Part 1 General Information
1. Indoor and Outdoor Units…………………………………………………………. 2 2. External Appearance………………………………………………………………… 2
1

1. Indoor and Outdoor Units

Series

Capacity

18K

24K

30K

15 SEER ON/OFF

36K

42K

48K

60K

2. External Appearance
Indoor Unit

Outdoor units ATSCV4C4T18 ATSCV4H4T18 ATSCV4C4T24 ATSCV4H4T24 ATSCV4C4T30 ATSCV4H4T30 ATSCV4C4T36 ATSCV4H4T36 ATSCV4C4T42 ATSCV4H4T42 ATSCV4C4T48 ATSCV4H4T48 ATSCV4C4T60 ATSCV4H4T60
Outdoor Unit

Indoor units ATSEM4H4T18 ATSFR4H4T18 ATSEM4H4T24 ATSFR4H4T24 ATSEM4H4T30 ATSFR4H4T30 ATSEM4H4T36 ATSFR4H4T36 ATSEM4H4T42
ATSEM4H4T48
ATSEM4H4T60

2

Part 2 Engineering Data
1. Specifications………………………………………………………………………….. 4 2. Dimensions……………………………………………………………………………. 11 3. Installation Space Requirements …………………………………………….. 14 4. Piping Diagrams …………………………………………………………………….. 16 5. Wiring Diagrams…………………………………………………………………….. 17 6. Capacity Tables ……………………………………………………………………… 21 7. Accessories …………………………………………………………………………… 25
3

1. Specifications

1.1 Outdoor Units

Model

Outdoor power supply

Capacity

Cooling

Input EER2

SEER2 (AHRI Certified)

Heating

Capacity HSPF2 (AHRI Certified)

Max. input consumption

Max. current

Brand

Model

Type

Capacity

Compressor

Input

Rated current (RLA)

Locked rotor Amp (LRA)

Thermal protector

Refrigerant oil

Brand

Type

Input Outdoor fan motor
Output

Capacitor

Speed

Number of row

Fin spacing

Fin material

Outdoor coil

Tube outside diameter

Tube type

Coil length x height x width

Number of circuit

Outdoor air flow

Outdoor sound pressure level

Unit (WHD)

Outdoor dimension

Packing (WHD)

Refrigerant
Refrigerant pipe
Design pressure Max. pressure Operation temp range

Net / Gross weight Type Charging volume Liquid side Gas side Max. refrigerant pipe length Max. difference in level
Cooling Heating

V/Ph/Hz Btu/h W
Btu/(h·W) Btu/(h·W)
Btu/h Btu/(h·W)
W A
Btu/h W A A F ml
W W F rpm
in
mm
in
CFM dB(A)
in mm in mm kg lbs
oz in in ft ft MPa MPa

ATSCV4C4T18
17500 1550 11.7 14.3
2250 11.5 LG APG016KAC Scroll 19300 1290 5.6 48 35 740 GREEN-INTELLIGENCE AC 162 85 6 950 2 1/18 Hydrophilic Aluminium Fin 7 Inner Grooved 61.7×23.15×1.05 6 2000 60 23-3/5×25×23-3/5 600×635×600 24-4/5×26-1/5×24-4/5 630×665×630 54.5/57 120/126 R410A 93.5 3/8 3/4 148 66 2.7/1.0 4.5 64-118 /

ATSCV4C4T24 208/230/1/60
23400 2000 11.7 14.3
3050 15.0 LG APG020KAC Scroll 24800 1570 6.9 52 35 740 GREEN-INTELLIGENCE AC 162 85 6 950 2 1/18 Hydrophilic Aluminium Fin 7 Inner Grooved 61.7×23.15×1.05 6 2000 60 23-3/5×25×23-3/5 600×635×600 24-4/5×26-1/5×24-4/5 630×665×630 55.5/58 122/128 R410A 102.3 3/8 3/4 148 66 2.7/1.0 4.5 64-118 /

ATSCV4C4T30
28000 2350 11.7 14.3
3300 17.0 LG APG024KAC Scroll 29500 1870 8.2 63 40 740 GREEN-INTELLIGENCE AC 226 160 6 1050 2 1/18 Hydrophilic Aluminium Fin 7 Inner Grooved 61.7×23.15×1.05 6 2250 63 23-3/5×25×23-3/5 600×635×600 24-4/5×26-1/5×24-4/5 630×665×630 63/65.5 137/144 R410A 102.3 3/8 3/4 148 66 2.8/1.0 4.5 64-118 /

4

Model

Outdoor power supply

Capacity

Cooling

Input EER2

SEER2 (AHRI Certified)

Heating

Capacity HSPF2 (AHRI Certified)

Max. input consumption

Max. current

Brand

Model

Type

Capacity

Compressor

Input
Rated current (RLA) Locked rotor Amp (LRA) Thermal protector

Refrigerant oil

Brand

Type

Outdoor fan motor

Input Output

Capacitor

Speed

Number of row

Fin spacing

Fin material

Outdoor coil

Tube outside diameter
Tube type Coil length x height x width
Number of circuit

Outdoor air flow

Outdoor sound pressure level

Unit (WHD)

Outdoor dimension

Packing (WHD)

Net / Gross weight

Refrigerant
Refrigerant pipe
Design pressure Max. pressure Operation temp range

Type Charging volume Liquid side Gas side Max. refrigerant pipe length Max. difference in level
Cooling Heating

V/Ph/Hz Btu/h W
Btu/(h·W) Btu/(h·W)
Btu/h Btu/(h·W)
W A
Btu/h W A A F ml
W W F rpm
in
mm
in
CFM dB(A)
in mm in mm kg lbs
oz in in ft ft MPa MPa

ATSCV4C4T36

ATSCV4C4T42

ATSCV4C4T48

ATSCV4C4T60

33000 2750 11.7 14.3
4455 23.0 LG APG029KAC Scroll 35800 2200 9.8
79.0
45 740 GREEN-INTELLIGENCE AC 197 110 6 850 2 1/18 Hydrophilic Aluminium Fin 7
Inner Grooved
83.8×23.15×1.05
6 2750
63 29-1/7×25×29-1/7
740×635×740 30-3/10×26-1/5×x30-
3/10 770×665×770
72.5/75.5 160/166 R410A
116.4 3/8 3/4
148

208/230/1/60

40000

45000

3440

3800

11.7

11.2

14.3

13.8

5430

6000

28.0

29.5

LG

ABG036KAC

ABG039KAC

Scroll

44700

48200

2790

3000

12.3

13.7

112.3

94.0

45 1280 GREEN-INTELLIGENCE AC 210 110
6 850 2 1/18 Hydrophilic Aluminium Fin 7

70 1280 GREEN-INTELLIGENCE AC 370 230
12 1050
2 1/18 Hydrophilic Aluminium Fin 7

Inner Grooved

83.8×31.48×1.05

10 3300
65 29-1/7×32-7/8×29-1/7
740×835×740 30-3/10×34-4/5×30-
3/10 770×885×770
90/95 198/209 R410A
151.7 3/8 3/4

10 4000
65 29-1/7×32-7/8×29-1/7
740×835×740 30-3/10×34-4/5×30-
3/10 770×885×770
92/97 203/214 R410A
158.7 3/8 7/8

148

55500 4920 11.2 13.8
7300 37.0 LG ABG051KAC Scroll 63000 3830 17.4
127.9
70 1280 GREEN-INTELLIGENCE AC 370 230
12 1050
2 1/18 Hydrophilic Aluminium Fin 7
Inner Grooved
83.8×31.48×1.05
10 4000
63 29-1/7×32-7/8×29-1/7
740×835×740 30-3/10×34-4/5×30-
3/10 770×885×770
93/98 205/216 R410A
162.3 3/8 7/8
148

66 2.7/1.0
4.5 64-118
/

66 2.8/1.0
4.5 64-118
/

5

Model

Outdoor power supply

Capacity

Cooling

Input EER2

SEER2 (AHRI Certified)

Heating

Capacity HSPF2(AHRI Certified)

Max. input consumption

Max. current

Brand

Model

Type

Capacity

Compressor

Input

Rated current (RLA)

Locked rotor Amp (LRA)

Thermal protector

Refrigerant oil

Brand

Model

Input Outdoor fan motor
Output

Capacitor

Speed

Number of row

Fin spacing

Fin material

Outdoor coil

Tube outside diameter

Tube type

Coil length x height x width

Number of circuit

Outdoor air flow

Outdoor sound pressure level

Unit (WHD)

Outdoor dimension

Packing (WHD)

Refrigerant
Refrigerant pipe
Design pressure Max. pressure Operation temp range

Net / Gross weight Type Charging volume Liquid side Gas side Max. refrigerant pipe length Max. difference in level
Cooling Heating

V/Ph/Hz Btu/h W
Btu/(h·W) Btu/(h·W)
Btu/h Btu/(h·W)
W A
Btu/h W A A F ml
W W F rpm
in
mm
in
CFM dB(A)
in mm in mm kg lbs
oz in in ft ft MPa MPa

ATSCV4H4T18
17500 1550 11.5 14.3 17500 7.5 2250 11.5 LG APG016KAC Scroll 19300 1290 5.6
48 35 740 GREEN-INTELLIGENCE AC 162 85 6 950 2 1/18 Hydrophilic Aluminium Fin 7 Inner Grooved 61.7×23.15×1.05 6 2000 60 23-3/5×25×23-3/5 600×635×600 24-4/5×26-1/5×24-4/5 630×665×630 57.5/60 127/132 R410A 93.5 3/8 3/4 148 66 2.7/1.0 4.5 64-118 17-80

ATSCV4H4T24 208/230/1/60
22000 2000 11.2 14.3 22000 7.5 3050 15.0 LG APG020KAC Scroll 24800 1570 6.9
52 35 740 GREEN-INTELLIGENCE AC 162 85 6 950 2 1/18 Hydrophilic Aluminium Fin 7 Inner Grooved 61.7×23.15×1.05 6 2000 60 23-3/5×25×23-3/5 600×635×600 24-4/5×26-1/5×24-4/5 630×665×630 58.5/61 129/134 R410A 98.8 3/8 3/4 148 66 2.7/1.0 4.5 64-118 17-80

ATSCV4H4T30
28000 2370 11.5 14.3 26000 7.5 3300 17.0 LG APG024KAC Scroll 29500 1870 8.2
63 40 740 GREEN-INTELLIGENCE AC 226 160 6 1050 2 1/18 Hydrophilic Aluminium Fin 7 Inner Grooved 61.7×23.15×1.05 6 2250 63 23-3/5×25×23-3/5 600×635×600 24-4/5×26-1/5×24-4/5 630×665×630 66/68.5 146/151 R410A 105.8 3/8 3/4 148 66 2.8/1.0 4.5 64-118 17-80

6

Model

Outdoor power supply

Capacity

Cooling

Input EER2

SEER2 (AHRI Certified)

Heating

Capacity
HSPF2(AHRI Certified)

Max. input consumption

Max. current

Brand

Model

Type

Capacity

Compressor

Input
Rated current (RLA) Locked rotor Amp (LRA) Thermal protector

Refrigerant oil

Brand

Outdoor fan motor

Model Input Output Capacitor Speed Number of row Fin spacing

Fin material

Outdoor coil

Tube outside diameter
Tube type Coil length x height x width
Number of circuit

Outdoor air flow

Outdoor sound pressure level

Unit (WHD)

Outdoor dimension

Packing (WHD)

Net / Gross weight

Refrigerant
Refrigerant pipe
Design pressure Max. pressure Operation temp range

Type Charging volume Liquid side Gas side Max. refrigerant pipe length Max. difference in level
Cooling Heating

V/Ph/Hz Btu/h W
Btu/(h·W) Btu/(h·W)
Btu/h Btu/(h·W)
W A
Btu/h W A A F ml
W W F rpm
in
mm
in
CFM dB(A)
in mm in mm kg lbs
oz in in ft ft MPa MPa

ATSCV4H4T36

ATSCV4H4T42

ATSCV4H4T48

ATSCV4H4T60

33000 2780 11.5
14.3
33000
7.5
4455 23.0 LG APG029KAC Scroll 35800 2200 9.8
79.0
45 740
GREEN-INTELLIGENCE
AC 197 110
6 850
2 1/18 Hydrophilic Aluminium Fin 7 Inner Grooved
83.8×23.15×1.05
6 2750
63 29-1/7×25×29-1/7
740×635×740 30-3/10×26-1/5×x30-
3/10 770×665×770
75.5/78.5 166/173 R410A
123.5 3/8 3/4 148

40000 3400 11.5

208/230/1/60

45000 3770 11.5

14.3

40000

44000

7.5

5430 28.0 LG ABG036KAC Scroll 44700 2790 12.3

6000 29.5 LG ABG039KAC Scroll 48200 3000 13.7

112.3

94.0

45 1280

70 1280

GREEN-INTELLIGENCE GREEN-INTELLIGENCE

AC 210 110
6 850
2 1/18 Hydrophilic Aluminium Fin 7

AC 370 230 12 1050
2 1/18 Hydrophilic Aluminium Fin 7

Inner Grooved

83.8×31.48×1.05

10 3300
65 29-1/7×32-7/8×29-1/7
740×835×740 30-3/10×34-4/5×30-
3/10 770×885×770
94/99 207/218 R410A
151.7 3/8 3/4

10 4000
65 29-1/7×32-7/8×29-1/7
740×835×740 30-3/10×34-4/5×30-
3/10 770×885×770
97/102 214/225 R410A
162.3 3/8 7/8

148

56000 4870 11.5
14.3
53000
7.5
7300 37.0 LG ABG051KAC Scroll 63000 3830 17.4
127.9
70 1280 Panassonic/ BroadOcean DC 270 200
/ 1050 2.5 1/18 Hydrophilic Aluminium Fin 7
Inner Grooved
83.8×31.48×1.58
8 4000
63 29-1/7×32-7/8×29-1/7
740×835×740 30-3/10×34-4/5×30-
3/10 770×885×770
104/109 229/240 R410A
197.5 3/8 7/8
148

66 2.7/1.0
4.5 64-118 17-80

66 2.8/1.0
4.5 64-118 17-80

7

1.2 Indoor Units

Model

Power supply

Cooling

Capacity SEER2

Indoor external static pressure

Throttle type

Number of row

Tube pitch(a) x row pitch(b)

Fin spacing

Indoor coil

Fin material Tube outside diameter

Tube type

Coil length x height x width

Number of circuit

Brand

Type

Indoor fan motor

Input Output

Capacitor

Speed

Blower

Diameter Width

Indoor air flow

Indoor sound pressure level

Unit (WHD)

Indoor dimension

Packing (WHD)

Refrigerant pipe

Net / Gross weight
Liquid side Gas side

V/Ph/Hz Btu/h
Btu/(h·W) Pa
in in
mm
in
W W F rpm in in CFM dB(A) in mm in mm kg lbs in in

ATSEM4H4T18
17500 14.3 125 Orifice 3(row)×2(piece) 0.83×0.53 1/17 Hydrophilic Aluminium Fin 7 Inner Grooved 17.36×14.88×1.58
6 Kangbao
AC 265 180 6 830 11 11 580
/ 19-2/3×45-3/4×22
500×1162×560 22-5/6×47-5/8×25-3/5
580×1210×650 57/62
126/137 3/8 3/4

ATSEM4H4T24 208/230/1/60
22000 14.3 125 Orifice 4(row)×2(piece) 0.83×0.53 1/17 Hydrophilic Aluminium Fin 7 Inner Grooved 17.36×16.54×2.11
8 Kangbao
AC 398 220 10 910 11 11 800
/ 19-2/3×45-3/4×22
500×1162×560 22-5/6×47-5/8×25-3/5
580×1210×650 60/65
132/143 3/8 3/4

ATSEM4H4T30
28000 14.3 125 Orifice 4(row)×2(piece) 0.83×0.53 1/17 Hydrophilic Aluminium Fin 7 Inner Grooved 17.36×16.54×2.11
8 Genteq/Wolong/Broad-Ocean
ECM 267 373
/ 960 11 11 980
/ 19-2/3×45-3/4×22
500×1162×560 22-5/6×47-5/8×25-3/5
580×1210×650 59/64 130/141 3/8 3/4

8

Model

Power supply

Cooling

Capacity SEER2

Indoor external static pressure

Throttle type

Number of row Tube pitch(a) x row pitch(b) Fin spacing

Indoor coil

Fin material
Tube outside diameter Tube type Coil length x height x width Number of circuit

Brand

Type

Indoor fan motor

Input Output

Capacitor

Speed

Blower

Diameter Width

Indoor air flow

Indoor sound pressure level

Unit (WHD)

Indoor dimension

Packing (WHD)

Net / Gross weight

Refrigerant Liquid side

pipe

Gas side

ATSEM4H4T36

ATSEM4H4T42

ATSEM4H4T48

ATSEM4H4T60

V/Ph/Hz Btu/h
Btu/(h·W) Pa
in in
mm
in
W W F rpm in in CFM dB(A) in mm in mm kg lbs in in

33000 14.3 125 Orifice 4(row)×2(piece)
0.83×0.53
1/17 Hydrophilic Aluminium
Fin 7 Inner Grooved
17.36×16.54×2.11
8 Genteq/Wolong/Broad-
Ocean ECM 317 373
/ 1000
11 11 1150 / 19-2/3×45-3/4×22 500×1162×560 22-5/6×47-5/8×25-3/5 580×1210×650 59/64 130/141 3/8 3/4

208/230/1/60

40000

45000

14.3

13.8/14.3

125

Orifice

4(row)×2(piece)

0.83×0.53

1/17 Hydrophilic Aluminium
Fin
7

Inner Grooved

17.36×16.54×2.11

19.84×21.5×2.11

8 Genteq/Wolong/Broad-
Ocean ECM 317 560
/ 1040
11 11 1280 / 19-2/3×45-3/4×22 500×1162×560 22-5/6×47-5/8×25-3/5 580×1210×650 61/66 134/146 3/8 3/4

12 Genteq/Wolong/Broad-
Ocean ECM 365 560
/ 1010
11 11 1580 / 22×53-1/8×24 560×1350×623 27-3/4×54-9/10×25-1/5 705×1395×640 78/84 172/185 3/8 7/8

55500 13.8/14.3
125 Orifice 5(row)×2(piece)
0.83×0.53
1/17 Hydrophilic Aluminium
Fin 7 Inner Grooved
19.84×21.5×2.63
12 Genteq/Wolong/Broad-
Ocean ECM 473 560
/ 1010
11 11 1570 / 22×53-1/8×24 560×1350×623 27-3/4×54-9/10×25-1/5 705×1395×640 78/84 172/185 3/8 7/8

9

Model

Power supply

Cooling

Capacity SEER2

Indoor external static pressure

Throttle type

Number of row Tube pitch(a) x row pitch(b) Fin spacing

Indoor coil

Fin material
Tube outside diameter Tube type Coil length x height x width Number of circuit

Brand

Type

Indoor fan motor

Input Output

Capacitor

Speed (Hi/Me/Lo)

Blower

Diameter Width

Indoor air flow

Indoor sound pressure level

Unit (WHD)

Indoor dimension

Packing (WHD)

Net / Gross weight

Refrigerant Liquid side

pipe

Gas side

V/Ph/Hz Btu/h
Btu/(h·W) Pa
in in
mm
in
W W F rpm in in CFM dB(A) in mm in mm kg lbs in in

ATSFR4H4T18

ATSFR4H4T24

ATSFR4H4T30

ATSFR4H4T36

17500 14.3 145 Orifice
5
0.83×0.53
1/17 Hydrophilic Aluminium
Fin 7 Inner Grooved
16.97×18.2×2.63
6 Genteq/Wolong/Broad-
Ocean ECM 166 249
/ 960 11 10 715
/ 20-3/5×36×15 522×915×381 23-1/5×39-2/5×17-7/10 590×1000×450
40/44 88/97
3/8 3/4

22000 14.3 145 Orifice
5

208/230/1/60

28000 14.3 145 Orifice
5

0.83×0.53

1/17 Hydrophilic Aluminium
Fin
7

Inner Grooved

16.97×18.2×2.63

17.44×23.15×2.63

6 Genteq/Wolong/Broad-
Ocean ECM 221 249
/ 1010
11 10 805 / 20-3/5×36×15 522×915×381 23-1/5×39-2/5×17-7/10 590×1000×450 40/44 88/97 3/8 3/4

8 Genteq/Wolong/Broad-
Ocean ECM 267 373
/ 960 11
6 1020
/ 22-1/10×39-3/5×19
559×1006×485 24-3/5×42-9/10×21-3/5
625×1090×550 51/56 112/123 3/8 3/4

33000 14.3 145 Orifice
5
0.83×0.53
1/17 Hydrophilic Aluminium
Fin 7 Inner Grooved
17.44×23.15×2.63
8 Genteq/Wolong/Broad-
Ocean ECM 317 373
/ 1000
11 6 1145 / 22-1/10×39-3/5×19 559×1006×485 24-3/5×42-9/10×21-3/5 625×1090×550 51/56 112/123 3/8 3/4

10

2. Dimensions 2.1 Outdoor Units

H

Model name
ATSCV4C4T18 ATSCV4H4T18 ATSCV4C4T24 ATSCV4H4T24 ATSCV4C4T30 ATSCV4H4T30 ATSCV4C4T36 ATSCV4H4T36 ATSCV4C4T42 ATSCV4H4T42 ATSCV4C4T48 ATSCV4H4T48 ATSCV4C4T60 ATSCV4H4T60

W
“W” mm (in.) 600 (23-5/8) 740 (29-1/8) 740 (29-1/8)

D
Dimensions “D” mm (in.) 600 (23-5/8) 740 (29-1/8) 740 (29-1/8)

“H” mm (in.) 635 (25) 635 (25)
835 (32-7/8)

11

2.2 Indoor Units
High voltage connection
Low voltage connection

Supply Air Flanges provided for field installation A 10-1/2
H

Gas pipe connection (Sweat) Liquid pipe connection (Sweat)

Auxiliary drain connection 3/4″ Female pipe thread (NPT)
Primary drain connection 3/4″ Female pipe thread (NPT)

D W
Upflow unit shown; Unit may be installed upflow, downflow, horizontal right, or left air supply.

Model name
ATSEM4H4T18 ATSEM4H4T24 ATSEM4H4T30 ATSEM4H4T36 ATSEM4H4T42 ATSEM4H4T48 ATSEM4H4T60

“W” mm (in.)

Dimensions

“D” mm (in.)

“H” mm (in.)

Supply duct “A” mm (in.)

500 (19-2/3)

560 (22)

1162 (45-3/4)

454 (17-7/8)

560 (22)

623 (24-1/2)

1350 (53-1/8)

496 (19-1/2)

12

High voltage connection

D1

1-2/25″(7/8″) dia knock outs

Low voltage connection

High voltage connection 7/8″(1-3/8″) dia knock outs

Supply Air
W1 Vapor line connection copper (Sweat) (3/4″dia pipe) Liquid line connection copper (Sweat) (3/8″dia pipe) High voltage connection 7/8″(1-3/8″) dia knock outs
H

Primary drain connection 3/4″ Female pipe thread (NPT)
Auxiliary drain connection 3/4″ Female pipe thread (NPT)

D
All units are configured for vertical upflow. Units cannot be installed in any other configuration.

Front return shown. Units may also be installed as bottom return. See the applications section for more details.

Model name
ATSFR4H4T18 ATSFR4H4T24 ATSFR4H4T30 ATSFR4H4T36

“W” mm (in.)

“W1” mm (in.)

Dimensions

“D” mm (in.)

“D1” mm (in.)

522 (20-1/2)

442 (17-2/5)

381 (15)

244 (9-3/5)

559 (22)

477 (18-4/5)

485 (19)

251 (10)

“H” mm (in.) 915 (36)
1006 (39-3/5)

Model name
ATSFR4H4T18 ATSFR4H4T24 ATSFR4H4T30 ATSFR4H4T36

“A” mm (in.) 136 (5-3/8)

Dimensions “B” mm (in.)
61 (2-2/5)

151 (6)

61 (2-2/5)

“C” mm (in.) 718 (28-1/4) 794 (31-1/4)

13

3. Installation Space Requirements 3.1 Outdoor Units
3.2 Indoor Units Regular Air Handler:
Horizontal position:
Vertical position:
14

Front Return Air Handler:
15

4. Piping Diagrams Cooling only models:
Heat pump models:
16

5. Wiring Diagrams 5.1 Outdoor Units Cooling only models 18K-60K:
Heat pump models 18K-48K:
17

Heat pump models 60K:
18

5.2 Indoor Units Regular Air Handler: 18K, 24K:
30K, 36K, 42K, 48K, 60K:
19

Front Return Air Handler: 18K, 24K, 30K, 36K:
20

6. Capacity Tables 6.1 Cooling Capacity Tables
Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115

ATSCV4C4T18 ATSCV4H4T18 ATSEM4H4T18 – Orifice Conditions: 80 °F IDB, 67 °F IWB @ 580 CFM

Total Btu/h

Sensible Btu/h

Latent Btu/h

20909 20371 19816 19243 18650 18107 17548 16972 16378

14491 14511 14496 14447 14360 14350 14301 14214 14085

6417 5861 5320 4796 4289 3757 3246 2758 2293

Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115

Total Btu/h

ATSCV4C4T24 ATSCV4H4T24 ATSEM4H4T24 – Orifice Conditions: 80 °F IDB, 67 °F IWB @ 800CFM
Sensible Btu/h

Latent Btu/h

27084 26359 25649 24949 24252 23489 22734 21988 21247

18742 18557 18442 18337 18311 18321 18301 18250 18060

8342 7802 7207 6611 5942 5168 4433 3738 3187

Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115

ATSCV4C4T30 ATSCV4H4T30 ATSEM4H4T30- Orifice Conditions: 80 °F IDB, 67 °F IWB @ 980 CFM

Total Btu/h

Sensible Btu/h

Latent Btu/h

31475 30844 30173 29464 28726 27930 27093 26228 25338

22473 22424 22389 22334 22262 22205 22162 21901 21791

9002 8421 7785 7130 6463 5726 4931 4328 3547

Total Watts 1273 1344 1416 1490 1562 1645 1729 1817 1900
Total Watts 1656 1737 1829 1920 2024 2114 2218 2331 2454
Total Watts 1912 2006 2113 2223 2342 2465 2593 2730 2874

21

Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115
Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115
Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115

ATSCV4C4T36 ATSCV4H4T36 ATSEM4H4T36 – Orifice Conditions: 80 °F IDB, 67 °F IWB @ 1150CFM

Total Btu/h

Sensible Btu/h

Latent Btu/h

37813 36925 35982 35023 34059 32946 31851 30774 29721

26847 26734 26699 26617 26566 26456 26373 26250 26154

10966 10191 9283 8406 7493 6490 5478 4524 3566

ATSCV4C4T42 ATSCV4H4T42 ATSEM4H4T42 – Orifice Conditions: 80 °F IDB, 67 °F IWB @ 1280 CFM

Total Btu/h

Sensible Btu/h

Latent Btu/h

45541 44617 43638 42602 41497 40327 39077 37779 36448

31332 31187 31070 30887 30708 30648 30558 30412 30361

14209 13430 12568 11716 10789 9678 8519 7367 6087

ATSCV4C4T48 ATSCV4H4T48 ATSEM4H4T48- Orifice Conditions: 80 °F IDB, 67 °F IWB @ 1580CFM

Total Btu/h

Sensible Btu/h

Latent Btu/h

50471 49380 48231 47090 45997 44944 43803 42577 41280

35834 35751 35739 35694 35648 35551 35481 35424 35294

14637 13629 12492 11396 10349 9393 8323 7153 5986

Total Watts 2262 2379 2500 2624 2756 2891 3039 3202 3384
Total Watts 2803 2954 3112 3274 3444 3604 3771 3945 4126
Total Watts 3117 3310 3504 3693 3884 4062 4251 4454 4667

22

Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115
Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115
Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115

ATSCV4C4T60 ATSEM4H4T60- Orifice Conditions: 80 °F IDB, 67 °F IWB @ 1570 CFM

Total Btu/h

Sensible Btu/h

Latent Btu/h

61905 60466 58991 57486 56267 54306 52669 51020 49364

40424 40331 40232 40068 39950 39860 39818 39693 39590

21481 20135 18759 17418 16318 14445 12851 11326 9774

ATSCI4H4T60 ATSEM4H4T60 – Orifice Conditions: 80 °F IDB, 67 °F IWB @ 1570CFM

Total Btu/h

Sensible Btu/h

Latent Btu/h

63127 61698 59352 58246 57175 55459 53886 52304 50719

40907 40782 40656 40655 40594 40541 40522 40431 40321

22221 20915 18696 17590 16581 14919 13364 11873 10397

ATSCV4C4T18 ATSCV4H4T18 ATSFR4H4T18- Orifice Conditions: 80 °F IDB, 67 °F IWB @ 715 CFM

Total Btu/h

Sensible Btu/h

Latent Btu/h

21772 21041 20296 19536 18759 18188 17601 16998 16378

15860 15651 15409 15133 14820 14778 14697 14576 14412

5912 5390 4887 4403 3939 3410 2904 2422 1965

Total Watts 4039 4241 4450 4673 4911 5141 5388 5653 5933
Total Watts 3906 4114 4335 4561 4802 5024 5256 5500 5757
Total Watts 1268 1339 1411 1485 1509 1641 1726 1815 1839

23

Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115
Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115
Outdoor Tem. °F.
75 80 85 90 95 100 105 110 115

ATSCV4C4T24 ATSCV4H4T24 ATSFR4H4T24 – Orifice Conditions: 80 °F IDB, 67 °F IWB @ 805CFM

Total Btu/h

Sensible Btu/h

Latent Btu/h

27084 26359 25649 24949 24154 23489 22734 21988 21247

18742 18557 18442 18337 18336 18321 18301 18250 18060

8342 7802 7207 6611 5818 5168 4433 3738 3187

ATSCV4C4T30 ATSCV4H4T30 ATSFR4H4T30 – Orifice Conditions: 80 °F IDB, 67 °F IWB @ 1020 CFM

Total Btu/h

Sensible Btu/h

Latent Btu/h

32019 31334 30475 29578 28661 27895 27095 26242 25372

23054 22937 22856 22805 22642 22539 22434 22385 22327

8965 8398 7619 6773 6019 5356 4660 3858 3045

ATSCV4C4T36 ATSCV4H4T36 ATSFR4H4T36- Orifice Conditions: 80 °F IDB, 67 °F IWB @ 1145CFM

Total Btu/h

Sensible Btu/h

Latent Btu/h

37369 36584 35573 34511 33632 32639 31612 30569 29516

26532 26523 26395 26229 26233 26046 25922 25831 25679

10837 10061 9178 8283 7399 6593 5690 4738 3837

Total Watts 1636 1720 1809 1900 1996 2089 2190 2300 2419
Total Watts 1949 2042 2158 2265 2373 2496 2616 2744 2877
Total Watts 2273 2392 2510 2638 2775 2911 3059 3422 3404

24

7. Accessories 7.1 Standard Accessories
Items Installation manual
Drain pipe Drain plug
7.2 Optional Accessories
Items a

Quantity 1 1 2
Accessories Electric heater

25

Part 3 Outdoor Unit Installation
1. Safety27 2. Unit Location Considerations…………………………………………………..29 3. Unit Preparation ……………………………………………………………………..31 4. Setting the Unit……………………………………………………………………….31 5. Refrigerant Line Considerations ………………………………………………32 6. Refrigerant Line Routing………………………………………………………….33 7. Refrigerant Line Brazing ………………………………………………………….34 8. Refrigerant Line Leakage Check ………………………………………………36 9. Vacuum Drying ……………………………………………………………………….36 10. Service Valves ………………………………………………………………………..37 11. Additional Refrigerant Charge………………………………………………….37 12. Electrical Wiring ……………………………………………………………………..38
26

1. Safety
Important – This document contains a wiring diagram and service information. This is customer property and is to remain with this unit. Please return to service information pack upon completion of work.

CAUTION

This information is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience. Any attempt to repair a central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.

WARNING

HAZARDOUS VOLTAGE! Failure to follow this warning could result in property damage, severe personal injury, or death. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized.

WARNING

REFRIGERANT OIL! Any attempt to repair a central air conditioning product may result in property damage, severe personal injury, or death. These units use R-410A refrigerant which operates at 50 to 70% higher pressures than R-22. Use only R-410A approved service equipment. Refrigerant cylinders are painted a “Rose” color to indicate the type of refrigerant and may contain a “dip” tube to allow for charging of liquid refrigerant into the system. All R-410A systems with fixed speed compressors use a POE oil that readily absorbs moisture from the atmosphere to limit this `hygroscopic” action.The system should remain sealed whenever possible. If a system has been open to the atmosphere for more than 4 hours, the compressor oil must be replaced. Never break a vacuum with air and always change the driers when opening the system for component replacement.

CAUTION

HOT SURFACE! May cause minor to severe burning. Failure to follow this Caution could result in property damage or personal injury. Do not touch top of compressor.

CAUTION

CONTAINS REFRIGERANT! Failure to follow proper procedures can result in personal illness or injury or severe equipment damage. System contains oil and refrigerant under high pressure. Recover refrigerant to relieve pressure before opening system.

CAUTION

GROUNDING REQUIRED! Failure to inspect or use proper service tools may result in equipment damage or personal injury. Reconnect all grounding devices. All parts of this product that are capable of conducting electrical current aregrounded. if grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened.

27

WARNING

SERVICE VALVES! Failure to follow this warning will result in abrupt release of system charge and may result in personal injury and/orproperty damage. Extreme caution should be exercised when opening the Liquid Line Service valve. Turn valve stemcounterclockwise only until the stem contacts the rolled edge. No torque is required.

WARNING

BRAZING REQUIRED! Failure to inspect lines or use proper service tools may result in equipment damage or personal injury. If using existing refrigerant lines make certain that all joints are brazed, not soldered.

WARNING

HIGH LEAKAGE CURRENT! Failure to follow this warning could result in property damage, severe personal injury, or death. Earth connection essential before connecting electrical supply.

28

2. Unit Location Considerations
2.1 Unit Dimensions and Location Restrictions
When mounting the outdoor unit on a roof, be sure the roof will support the unit’s weight. Properly selected isolation is recommended to prevent sound or vibration transmission to the building structure. · Ensure the top discharge area is unrestricted for at least 60 inches above the unit. · Clearance must be provided in front of the control box (access panels) and any other side requiring service. · Position the outdoor unit a minimum of 18 inches from any wall or surrounding shrubbery to ensure adequate airflow. · Outdoor unit location must be far enough away from any structure to prevent excess roof runoff water from pouring directly on the unit. Note: It is recommended that these precautions be taken for units being installed in areas where snow accumulation and prolonged below-freezing temperatures occur. · Units should be elevated 3-12 inches above the pad or rooftop, depending on local weather. This additional height will allow drainage of snow and ice melted during defrost cycle prior to its refreezing. Ensure that drain holes in unit base pan are not obstructed, preventing drainage of defrost water. · If possible, avoid locations that are likely to accumulate snow drifts. if not possible, a snow drift barrier should be installed around the unit to prevent a build-up of snow on the sides of the unit.

Air inlet panel Allow 18” minimum clearance

Air discharge Allow 60” minimum clearance

Model
18K 24K 30K 36K 42K 48K 60K

H
Service access Allow 24” minimum clearance

D W

“W” mm (in.)

Dimensions “D” mm (in.)

“H” mm (in.)

600 (23-5/8)

635 (25)

740 (29-1/8)

635 (25)

740 (29-1/8)

835 (32-7/8)

Refrigerant Connection Service Valve Size

Liquid (in.)

Gas (in.)

3/8

3/4

3/8

3/4

3/8

3/4

3/8

3/4

3/8

3/4

3/8

7/8

3/8

7/8

29

2.2 Refrigerant Piping Limits
Considering the allowable pipe length and height drop to determine the installation position. Make sure the distance and height

drop between indoor and outdoor unit not exceed the data in the following table.

Model

Max. length ft(m)

Max. height drop ft(m)

Max. bend (pcs)

18-60 kBtu/h

148(45)

66(20)

5

2.3 Service Space

30

3. Unit Preparation
Check for damage and report promptly to the carrier any damage found to the unit. The charge port can be used to check to be sure the refrigerant charge has been retained during shipment.
4. Setting the Unit
When installing the unit on a support pad, such as a concrete slab, consider the following: · The pad should be at least 1-2″ larger than the unit on all sides. · The pad must be separate from any structure. · The pad must be level. · The pad should be high enough above grade to allow for drainage. · The pad location must comply with National, State, and Local codes. IMPORTANT NOTE: These instructions are intended to provide a method to tie-down system to cement slab as a securing procedure for high wind areas. It is recommended to check Local Codes for tie-down methods and protocols.
31

5. Refrigerant Line Considerations 5.1 Refrigerant Line and Service Valve Connection Sizes

Line Sizes

Model

Suction Line

Liquid Line

18K/24K/30K/36K/42K

3/4

3/8

48K/60K

7/8

3/8

Service Valve Connection Sizes

Suction Line Connection

Liquid Line Connection

3/4

3/8

7/8

3/8

5.2 Refrigerant Line Length and Insulation
Determine required line length.
IMPORTANT: The Suction Line must always be insulated. DO NOT allow the Liquid Line and Suction Line to come in direct (metal to metal) contact.

Liquid line

Suction line Insulation

5.3 Reuse Existing Refrigerant Lines

CAUTION

If using existing refrigerant lines make certain that all joints are brazed, not soldered.

For retrofit applications, where the existing refrigerant lines will be used, the following precautions should be taken: · Ensure that the refrigerant lines are the correct size. · Ensure that the refrigerant lines are free of leaks, acid, and oil. Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. Some of the benefits of installing approved matched indoor and outdoor split systems are maximum efficiency, optimum performance and the best overall system reliability.

32

6. Refrigerant Line Routing
Important: Take precautions to prevent noise within the building structure due to vibration transmission from the refrigerant lines. Comply with National, State, and Local Codes when isolating line sets from joists, rafters, walls, or other structural elements. For Example: · When the refrigerant lines have to be fastened to floor joists or other framing in a structure, use isolation type hangers. · Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings. · Where the refrigerant lines run through a wall or sill, they should be insulated and isolated. · Isolate the lines from all ductwork. · Minimize the number of 90º turns.
33

7. Refrigerant Line Brazing
1. Remove caps or plugs. Use a deburring tool to deburr the pipe ends. Clean both internal and external surfaces of the tubing using an emery cloth.
2. Remove the pressure tap cap from both service valves.
3. Purge the refrigerant lines and indoor coil with dry nitrogen. This pipe must have a thimble.
4. Wrap a wet rag around the valve body to avoid heat damage and continue the dry nitrogen purge. Braze the refrigerant lines to the service valves. Check liquid line filter drier’s directional flow arrow to confirm correct direction of refrigeration flow (away from outdoor unit and toward evaporator coil) as illustrated. Braze the filter drier to the Liquid Line. Continue the dry nitrogen purge. Do not remove the wet rag until all brazing is completed. Important: Remove the wet rag before stopping the dry nitrogen purge. Note: Install drier in Liquid Line.
34

5. Replace the pressure tap caps after the service valves have cooled. 35

8. Refrigerant Line Leakage Check
Pressurize the refrigerant lines and evaporator coil to 150 PSIG using dry nitrogen. Check for leaks by using a soapy solution or bubbles at each brazed location.
9. Vacuum Drying
Eliminating moisture in system to prevent the phenomena of ice-blockage and copper oxidation. Ice-blockage shall cause abnormal operation of system, while copper oxide shall damage compressor. Eliminating the non-condensable gas (air) in system to prevent the components oxidizing, pressure fluctuation and bad heat exchange during the operation of system. The ultimate vacuum degree of vacuum pump shall be -756mmHg or above. Precision of vacuum pump shall reach 0.02mmHg or above.
36

10. Service Valves

WARNING

Extreme caution should be exercised when opening the Liquid Line Service Valve. Turn counterclockwise until the valve stem just touches the rolled edge. No torque is required. Failure to follow this warning will result in abrupt release of system charge and may result in personal injury and /or property damage.

Important: Leak check and evacuation must be completed before opening the service valves.

Important: The Suction Service Valve must be opened first BEFORE opening the Liquid Service Valve!

1. Remove service valve cap.

2. Fully insert hex wrench into the stem and back out counterclockwise until valve stem just touches the rolled edge.

3. Replace the valve stem cap to prevent leaks. Tighten finger tight plus an additional 1/6 turn.

4. Repeat STEPS 1 – 3 for Liquid Service Valve.

5/16″ Hex Wrench for

Cap

Suction Service Valve

Unit Side of Service Valve

3/16″ Hex Wrench for Liquid Service Valve
Rolled Edge to Captivate Stem
Hex Headed Valve System

Service Port

11. Additional Refrigerant Charge
After the vacuum drying process is carried out, the additional refrigerant charge process need to be performed.

The outdoor unit is factory charged with refrigerant. The additional refrigerant charge volume is determined by the diameter

and length of the liquid pipe between indoor and outdoor unit. Refer the following formula to calculate the charging volume.

Diameter of liquid pipe inch (mm)

1/4 (6.35)

3/8 (9.52)

1/2 (12.7)

Formula

V=0.22oz×(L-16)

V=0.43oz×(L-16)

V=0.64oz×(L-16)

V: Additional refrigerant charging volume (oz).

L: The length of liquid pipe (ft).

Charging: weigh-In Method

Weigh-In Method can be used for the Initial installation, or anytime a system charge is being replaced. weigh-In Method can also

be used when power is not available to the equipment site or operating conditions (indoor/outdoor temperatures) are not in

range to verify with the subcooling charging method.

37

12. Electrical Wiring

WARNING

LIVE ELECTRICAL COMPONENTS! During installation, testing, servicing, and troubleshooting of this product, it may be necessary to work with live electrical components. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.

The right table defines the maximum total length of low voltage wiring from the outdoor unit, to the indoor unit, and to the thermostat. Field provided bushing or strain relief is required at the low voltage wire entry point.

WIRE SIZE 18 AWG 16 AWG 14 AWG

24 VOLTS MAX.WIRE LENGTH 150 Ft. 225 Ft. 300 Ft.

Notes: 1. Be sure power supply agrees with the equipment nameplate. 2. Power wiring and grounding of equipment must comply with national, state, and local codes. 3. Follow instructions on unit wiring diagram located on the inside of the control box cover. 4. Install a separate disconnect switch at the outdoor unit. 5. Field provided flexible electrical conduit must be used for high voltage wiring.

38

Part 4 Indoor Unit Installation
1. Safety …………………………………………………………………………………….40 2. Applications……………………………………………………………………………42 3. Electrical Wiring ……………………………………………………………………..45 4. Airflow Performance ……………………………………………………………….47 5. Ductwork………………………………………………………………………………..49 6. Refrigerant Connections ………………………………………………………….50 7. Air Filter (not factory- installed) ………………………………………………..52 8. Filter Installation Dimensions…………………………………………………..53 9. Wiring Diagram……………………………………………………………………….54 10. Electrical Wiring Gauge …………………………………………………………..55
39

1. Safety

Important – This is an attention alert symbol. When you see this symbol on labels or in manuals, be alert to the potential for personal injury.

WARNING

Disconnect all power to unit before installing or servicing. More than one disconnect switch may be required to de-energize the equipment. Hazardous voltage can cause server personal injury or death.

WARNING

If removal of the blower assembly is required, all disconnect switches supplying power to the equipment must be deenergized and locked (if not in sight of unit) so the field power wires can be safely removed from the blower assembly. Failure to do so can cause electrical shock resulting in personal injury or death.

WARNING

Because of possible damage to equipment or personal injury, installation, service, and maintenance should be performed by a trained, qualified service personnel. Consumer service is recommended only for filter cleaning / replacement. Never operate the unit with the acess panels removed.

WARNING

These instructions are intended as an aid to qualified, licensed service personnel for proper installation, adjustment and operation of this unit. Read these instructions thoroughly before attempting installation or operation. Failure to follow these instructions may result in improper installation, adjustment, service or maintenance possibly resulting in fire, electrical shock, property damage, personal injury or death.

WARNING

The unit must be permanently grounded. Failure to do so can result in electrical shock causing personal injury or death.

CAUTION

Make sure the blower motor support is tight (3-motor mount bolts) then check to see if wheel is secured to motor shaft before operating unit.

Blower motor shipping bolt 40

WARNING

PROPOSITION 65: This appliance contains fiberglass insulation. Respirable particles of fiberglass are known to State of California to cause cancer. All manufacturer products meet current federal OSHA Guidelines for safety. California Proposition 65 warnings are required for certain products, which are not covered by the OSHA standards. California’s Proposition 65 requires warnings for products sold in California that contain or produce any of over 600 listed chemicals known to the State of California to cause cancer or birth defects such as fiberglass insulation, lead in brass, and combustion products from natural gas. All “new equipment” shipped for sale in California will have labels stating that the product contains and /or produces Proposition 65 chemicals. Although we have not changed our processes, having the same label on all our products facilitates manufacturing and shipping. We cannot always know “when, or if” products will be sold in the California market. You may receive inquiries from customers about chemicals found in, or produced by, some of our heating and airconditioning equipment, or found in natural gas used with some of our products. Listed below are those chemicals and substances commonly associated with similar equipment in our industry and other manufacturers.
Glass Wool (Fiberglass) Insulation Carbon Monoxide (CO). Formaldehyde Benzene More details are available at the websites for OSHA (Occupational Safety and Health Administration), at www.osha.gov and the State of California’s OEHHA (Office of Environmental Health Hazard Assessment), at www.oehha.org. Consumer education is important since the chemicals and substances on the list are found in our daily lives. Most consumers are aware that products present safety and health risks, when improperly used, handled and maintained.

WARNING

The first 6 inches of supply air plenum and ductwork must be constructed of sheet metal as required by NFPA 90B. The supply air plenum or duct must have a solid sheet metal bottom directly under the unit with no openings, registers or flexible air ducts located in it. If flexible supply air ducts are used they may be located only in the vertical walls of rectangular plenum, a minimum of 6 inches from the solid bottom. Metal plenum of duct may be connected to the combustible floor base, if not, it must be connected to the unit supply duct exposed to the supply air opening from the downflow unit. Exposing combustible (non-metal) material to the supply opening of a downflow unit can cause a fire resulting in property damage, personal injury or death.

Exception warning to downflow: Installation on concrete floor slab with supply air plenum and ductwork completely encased must be not less than 2 inches of concrete (See NFPA 90A).

41

2. Applications Regular Air Handler: 2.1 Vertical Upflow
· Vertical Upflow configuration is the factory set on all models. · If return air is to be ducted, install duct flush with floor. Use fireproof resilient gasket 1/8 to 1/4 in. thick between the ducts, unit and floor. Set unit on floor over opening. IMPORTANT NOTE Torque applied to drain connections should not exceed 15.ft.lbs.
2.2 Vertical Downflow
Conversion to Vertical Downflow: A vertical upflow unit may be converted to vertical downflow. Remove the panel and indoor coil and reinstall 180° from original position.
42

2.3 Horizontal
Horizontal right is the default factory configuration for the units. Conversion to Horizontal left: A vertical upflow unit may be converted to horizontal left by removing indoor coil assembly and reinstalling coil as shown for left hand air supply. · Rotate unit into the downflow position, with the coil compartment on top and the blower compartment on bottom. · Reinstall the indoor coil 180° from original position. Ensure the retaining channel is fully engaged with the coil rail. · Secondary drain pan kits are recommended when the unit is configured for the horizontal position over a finished ceiling and/or living space.

CAUTION

Horizontal units must be configured for right hand air supply or left hand air supply. Horizontal drain pan must be located under indoor coil. Failure to use the drain pan can result in property damage.

Front Return Air Handler:
2.4 Wall Mount
The air handler comes standard with a wall mounting bracket and air handler mounting bracket. · Remove lower wall mounting bracket from the back of the unit by removing one screw which attaches the bracket to the air handler. Note: Discard the screw after you have removed the wall mounting bracket. · Install bracket on the wall by using 3 wood screws (not provided). Make sure the bracket is level in order to provided proper drainage from the unit. Note: Do not attach the wall mounting bracket into unsupported dry wall. Make sure that the wood screws are going into a structure that can support a minimum load of 150 lb. · Lift the air handler above the wall mounting bracket and attach the unit to the installed bracket. · Install the additional bottom plate for extra support for this type mounting. Note: The additional plate is shipped in the bottom of the shipping carton.

43

2.5 Frame Mount
The air handler comes with 8 clearance holes (4 on each side). These holes are used to mount the air handler inside of a frame structure. When mounting in this fashion, make sure that the wood screws are mounted from within the air handler and not from outside the unit in order to avoid damaging the coil. If the frame does not provide support in the front of the unit and additional support is needed, open up the tabs and fix the unit to the frame or other support structure with screws. Select a solid and level site to ensure proper installation of the frame mount. Verify that there is sufficient space for installation and maintenance. IMPORTANT: The (8) wood screws are not provided with the unit. #12 x 1 ½ wood screws are recommended. When the unit is installed on a wood frame, the screws should be used to fix the unit to the studs. If they are not used, the unit may fall down or cause other damage.
44

3. Electrical Wiring
Field wiring must comply with the National Electric Code and any applicable local ordinance.

WARNING

Disconnect all power to unit before installing or servicing. More than one disconnect switch may be required to de-energize the equipment. Hazardous voltage can cause severe personal injury or death.

3.1 Power Wiring
It is important that proper electrical power is available for connection to the unit model being installed. See the unit nameplate, wiring diagram and electrical data in the installation instructions. · If required, install a branch circuit disconnect of adequate size, located within sight of, and readily accessible to the unit. · IMPORTANT: After the Electric Heater is installed, units may be equipped with one or two 30-60 amp. circuit breakers. These breaker(s) protect the internal wiring in the event of a short circuit and serve as a disconnect. Circuit breakers installed within the unit do not provide over-current protection of the supply wiring and therefore may be sized larger than the branch circuit protection. · Supply circuit power wiring must be 75°C minimum copper conductors only. See Electrical Data in this section for ampacity, wire size and circuit protector requirement. Supply circuit protective devices may be either fuses or “HACR” type circuit breakers. · Power wiring may be connected to either the right, left side or top. Concentric knockouts are provided for connection of power wiring to unit.

3.2 Control Wiring
IMPORTANT: Class 2 low voltage control wiring should not be run in conduit with main power wiring and must be separated from power wiring, unless class 1 wire of proper voltage rating is used. · Low voltage control wiring should be 18 Awg. color-coded. For lengths longer than 100 ft., 16 Awg. wire should be used. · See wiring diagrams attached to indoor and outdoor sections to be connected. · Make sure, after installation, separation of control wiring and power wiring has been maintained.
3.3 Grounding

WARNING

The unit must be permanently grounded. Failure to do so can result in electrical shock causing personal injury or death.

· Grounding may be accomplished by grounding metal conduit when installed in accordance with electrical codes to the unit cabinet. · Grounding may also be accomplished by attaching ground wire(s) to ground lug(s) provided in the unit wiring compartment. · Ground lug(s) are located close to wire entrance on left side of unit(up-flow). Lug(s) may be moved to marked locations near wire entrance on right side of unit(up-flow). If alternate location is more convenient. · Use of multiple supply circuits require grounding of each circuit to lug(s) provided in unit.

45

3.4 Electrical Data

Series

Model

Voltage

Hz

18K

24K

30K

Regular Air

Handler

36K

42K

48K

208/230V

60

60K

18K

Front Return

24K

Air Handler

30K

36K

HP

Speed

Circuit Amps.

Maximum circuit protector

1/4

3

1.8

3(A)

2/7

3

2.3

3(A)

1/2

5

2.8

3(A)

1/2

5

4.0

6(A)

3/4

5

4.5

6(A)

3/4

5

5.2

6(A)

3/4

5

5.4

6(A)

1/3

5

2.2

3(A)

1/3

5

2.9

3(A)

1/2

5

3.5

6(A)

1/2

5

3.8

6(A)

46

4. Airflow Performance
Airflow performance data is based on cooling performance with a dry coil and no filter in place. Select performance table for appropriate unit size external static pressure applied to unit allows operation within the minimum and maximum limits shown in table below for both cooling and electric heater operation.
Regular Air Handler:

Model 18K 24K 30K 36K 42K 48K 60K

Blower Speeds L-Factory Default
M H L-Factory Default M H 1 2 3-Factory Default 4 5 1 2 3 4-Factory Default 5 1 2 3-Factory Default 4 5 1 2 3 4-Factory Default 5 1 2 3 4-Factory Default 5

0
934
1143 1194
1186
1256 1360 1153 1278
1378
1479 1575 1153 1278 1378
1479
1575 1202 1366
1527
1672 1821 1295 1478 1668
1821
1986 1295 1478 1668
1821
1986

0.1
882
1096 1147
1139
1204 1305
/ 1235
1338
/ / / 1235 1338
/
/ / /
1488
/ / / / /
1778
/ / / /
1778
/

0.2
813
1045 1094
1082
1149 1247 1041 1176
1298
1400 1492 1041 1176 1298
1400
1492 1118 1280
1452
1592 1747 1200 1385 1582
1742
1911 1200 1385 1582
1742
1911

External Static Pressure (in.w.c.)

0.3

0.4

0.5

719

651

579

981

866

788

1034

915

825

1024

901

801

1085

944

845

1179 1092

932

/

881

819

1111 1015

960

1243 1164 1085

/ / / 1111 1243

1290 1401 881 1015 1164

1203 1331 819 960 1085

/

1290 1203

/

1401 1331

/

952

891

/

1165 1064

1415 1369 1320

/

1516 1476

/

1644 1562

/

1076

971

/

1283 1232

/

1506 1461

1706 1671 1630

/

1837 1797

/

1076

971

/

1283 1232

/

1506 1461

1706 1671 1630

/

1837 1797

0.6
534
708 741
715
755 828 787 898
1036
1156 1239 787 898 1036
1156
1239 859 1012
1281
1440 1484 915 1196 1415
1594
1769 915 1196 1415
1594
1769

0.7
/
618 646
604
655 729
/ 854
974
/ / / 854 974
/
/ / /
1142
/ / / / /
1534
/ / / /
1534
/

0.8
/
557 556
554
559 582 674 811
929
997 1025 674 811 929
997
1025 741 919
1058
1089 1092 803 1015 1296
1490
1597 803 1015 1296
1490
1597

47

Front Return Air Handler:

Model

Blower Speeds

0

1

812

2-Factory Default

916

18K

3

1005

4

1122

5

1239

1

812

2

916

24K

3-Factory Default

1005

4

1122

5

1239

1

935

2

1059

30K

3

1150

4-Factory Default

1282

5

1404

1

935

2

1059

36K

3

1150

4

1282

5-Factory Default

1404

0.1 783
875
978 1096 1214 783 875
978
1096 1214 866 1009 1116
1235
1374 866 1009 1116 1235
1374

0.2 741
851
941 1061 1182 741 851
941
1061 1182 811 960 1069
1203
1335 811 960 1069 1203
1335

External Static Pressure (in.w.c.)

0.3

0.4

0.5

698

669

619

812

786

746

917 1036 1158 698 812

882 1002 1127 669 786

856 971 1088 619 746

917

882

856

1036 1158 770 921 1036

1002 1127 704 871 988

971 1088 636 829 953

1158 1131 1076

1306 770 921 1036 1158

1265 704 871 988 1131

1231 636 829 953 1076

1306 1265 1231

0.6 586
717
819 942 1051 586 717
819
942 1051 547 751 912
1050
1195 547 751 912 1050
1195

0.7 525
673
792 917 992 525 673
792
917 992 492 692 850
1015
1150 492 692 850 1015
1150

0.8 474
634
752 880 919 474 634
752
880 919 424 616 779
953
1115 424 616 779 953
1115

— Shaded boxes represent airflow outside the required 300-450 cfm/ton.
NOTES: Airflow based upon cooling performance at 230V with no electric heater and no filter. Airflow at 208V is approximately the same as 230V because the mult-tap ECM motor is a constant torque motor. The torque doesn’t drop off at the speeds in which the motor operates.

The air distribution system has the greatest effect on airflow. The duct system is totally controlled by the contractor. For this reason, the contractor should use only industry-recognized procedures. Heat pump systems require a specified airflow. Each ton of cooling requires between 350 and 450 cubic feet of air per minute (CFM), or 400 CFM nominally. Duct design and construction should be carefully done. System performance can be lowered dramatically through bad planning or workmanship.

Air supply diffusers must be selected and located carefully. They must be sized and positoined to deliver treated air along the perimerter of the space. If they are too small for their intended airflow, they become noisy. If they are not located properly, they cause drafts. Return air grilles must be properly sized to carry air back to the blower. If they are too small, they also cause noise. The installers should balance the air distribution system to ensure proper quiet airflow to all rooms in the home. This ensures a comfortable living space. An air velocity meter or airflow hood can be used to balance and verify branch and system airflow (CFM).

48

5. Ductwork
Field ductwork must comply with the National Fire Protection Association NFPA 90A, NFPA 90B and any applicable local
ordinance.

WARNING

Do not, under any circumstances, connect return ductwork to any other heat producing device such as fireplace insert, stove, etc. Unauthorized use of such devices may result in fire, carbon monoxide poisoning, explosion, personal injury or property damage.

Sheet metal ductwork run in unconditioned spaces must be insulated and covered with a vapor barrier. Fibrous ductwork may be used if constructed and installed in accordance with SMACNA Construction Standard on Fibrous Glass Ducts. Ductwork must comply with National Fire Protection Association as tested by U/L Standard 181 for Class I Air Ducts. Check local codes for requirements on ductwork and insulation. · Duct system must be designed within the range of external static pressure the unit is designed to operate against. It is important that the system airflow be adequate. Make sure supply and return ductwork, grilles, special filters, accessories, etc. are accounted for in total resistance. See airflow performance tables in this manual. · Design the duct system in accordance with “ACCA” Manual “D” Design for Residential Winter and Summer Air Conditioning and Equipment Selection. Latest editions are available from: “ACCA” Air Conditioning Contractors of America, 1513 16th Street, N.W., Washington, D.C. 20036. If duct system incorporates flexible air duct, be sure pressure drop information (straight length plus all turns) shown in “ACCA” Manual “D” is accounted for in system. · Supply plenum is attached to the 3/4″ duct flanges supplied with the unit. Attach flanges around the blower outlet. IMPORTANT: If an elbow is included in the plenum close to the unit, it must not be smaller than the dimensions of the supply duct flange on the unit. · IMPORTANT: The front flange on the return duct if connected to the blower casing must not be screwed into the area where the power wiring is located. Drills or sharp screw points can damage insulation on wires located inside unit. · Secure the supply and return ductwork to the unit flanges, using proper fasteners for the type of duct used and tape the duct-to-unit joint as required to prevent air leaks.

49

6. Refrigerant Connections
Keep the coil connections sealed until refrigerant connections are made. See the Installation Instructions for the outdoor unit for details on line sizing, tubing installation, and charging information. Coil is shipped with “No charge”. Evacuate the system before charging with refrigerant. Install refrigerant tubing so that it does not block service access to the front of the unit. Nitrogen should flow through the refrigerant lines while brazing. Use a brazing shield to protect the cabinet’s paint and a wet rag to protect the rubber grommet from being damaged by torch flames. After the refrigerant connections are made, seal the gap around the connections with pressure sensitive gasket.

6.1 Condensate Drain Tubing
Consult local codes for specific requirements.

Condensate Drain Trap

Do not operate unit without condensate drain trap.

Unit

Do not overtighten drain fitting, unit must be slightly inclined toward drain connection.

To approved drain

IMPORTANT: 1. When making drain fitting connections to the drain pan, use a thin layer of Teflon paste, silicone or Teflon tape and install, hand tighten. 2. When making drain fitting connections to drain pan, do not overtighten. Over tightening fittings can split pipe connetions on the drain pan. · Install drain lines so they do not block service access to front of the unit. Minimum clearance of 24 inches is required for filter, coil or blower removal and service access. · Make sure unit is level or pitched slightly toward primary drain connection so that water will drain completely from the pan. · Do not reduce drain line size less than connection size provided on condensate drain pan. · All drain lines must be pitched downward away from the unit a minimum of 1/8″ per foot of line to ensureproper drainage. · Do not connect condensate drain line to a closed or open sewer pipe. Run condensate to an open drain or run line to a safe outdoor area. · The drain line should be insulated where necessary to prevent sweating and damage due to condensate forming on the outside surface of the line. · Make provisions for disconnecting and cleaning of the primary drain line should it become necessary. Install a 3-inch trap in the primary drain line as close to the unit as possible. Make sure that the top of the trap is below connection to the drain pan to allow complete drainage of pan. · Auxiliary drain line should be run to a place where it will be noticeable if it becomes operational. Homeowner should be warned that a problem exists if water should begin running from the auxiliary drain line. · Plug the unused drain connection with the plugs provided in the accessory bag, using a thin layer of teflon paste, silicone or teflon tape to form a water tight seal. · Test condensate drain pan and drain line after installation is complete. Pour water into drain pan, enough to fill drain trap
50

and line. Check to make sure drain pan is draining completely, no leaks are found in drain line fittings, and water is draining from the termination of the primary drain line.
Front Return Air Handler
The unit is supplied with primary and auxiliary condensate drains that have 3/4″ NPT connections. Both drains must be trapped outside the unit and piped in accordance with applicable materials and building codes. Do not reduce the drain line size less than the connection size on the drain pan. Condensate should be piped to an open drain or to the outside. All drains must pitch downward away from the unit a minimum of 1/4″ per foot of line to ensure proper drainage. Insulate the primary drain line to prevent sweating where dew point temperatures may be met. (Insulation is optional depending on climate and application needs.) Important: If cleanout Tee is used, standpipe must be sealed/capped.
51

7. Air Filter (not factory-installed)
External filter or other means of filtration is required. Units should be sized for a maximum of 300 feet/min. Air velocity or what is recommended for the type filter installed. Filter application and placement are critical to airflow, which may affect the heating and cooling system performance. Reduced airflow can shorten the life of the system’s major components, such as motor, limits, elements, heat relays, evaporator coil or compressor. Consequently, we recommend that the return air duct system have only one filter location. For systems with a return air filter grille or multiple filter grilles, can have a filter installed at each of the return air openings. If adding high efficiency filters or electronic air filtration systems, it is very important that the air flow is not reduced. If air flow is reduced the overall performance and efficiency of the unit will be reduced. It is strongly recommended that a profesional installation technician is contacted to ensure installation of these such filtration systems are installed correctly. IMPORTANT: DO NOT DOUBLE FILTER THE RETURN AIR DUCT SYSTEM. DO NOT FILTER THE SUPPLY AIR DUCT SYSTEM.THIS WILL CHANGE THE PERFORMANCE OF THE UNIT AND REDUCE AIRFLOW.

WARNING

Do not operate the system without filters. A portion of the dust entrained in the air may temporarily lodge in the duct runs and at the supply registers. Any circulated dust particles could be heated and charred by contact with the air handler elements. This residue could soil ceilings, walls, drapes, carpets and other articles in the house. Soot damage may occur with filters in place, when certain types of candles, oil lamps or standing pilots are burned.

52

8. Filter Installation Dimensions

Dimension data

SERIES

MODEL

FILTER SIZE IN [mm]

Regular Air Handler Front Return Air Handler

18/24/30/36/42 48/60 18/24 30/36

18.1×21.4 [460×544] 20.5×23.8 [521×605] 15×19 [381×483] 20×20 [508×508]

NOTE: The thickness of the filter should be within 1″[25mm].
AIR FILTER REMOVAL / INSTALLATION 1. Remove bolts manually, remove air filter recover; 2. Hold the edge of the air filter and extract out; 3. Clean the air filter (Vacuum cleaner or pure water may be used to clean the air filter. If the dust accumulation is too heavy, use soft brush and mild detergent to clean it and dry out in cool place).

53

9. Wiring Diagram
1. To avoid the electrical shock, please connect the air conditioner with the ground lug. The main power plug in the air conditioner has been joined with the ground wiring, please don’t change it freely. 2. The power socket is used as the air conditioner specially. 3. Don’t pull the power wiring hard. 4. When connecting the air conditioner with the ground, observe the local codes. 5. If necessary, use the power fuse or the circuit, breaker or the corresponding scale ampere.

WARNING

High Voltage: Disconnect all power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury, or death.

54

10. Electrical Wiring Gauge
NOTE: The cross-section areas of wires or lines should not be less than the corresponding ones listed in the table below; besides,
if the power wires is quite long from the unit, please choose the windings with lager cross-section area to guarantee the normal
power supply.

Model (AC)

18K

24K

30K

36K

42K

48K

60K

Line quantity

3

Indoor unit

power line

Line diameter (AWG)

16

Line quantity

3

Outdoor unit

power line Line diameter

Line

(AWG)

14

12

10

8

gauge

Indoor-

Line quantity

5

thermostat

signal line

Line diameter (AWG)

18

Outdoor-

Line quantity

2

thermostat

signal line

Line diameter (AWG)

18

Model (HP)

18K

24K

30K

36K

42K

48K

60K

Line quantity

3

Indoor unit

power line

Line diameter (AWG)

16

Line quantity

3

Outdoor unit

power line Line diameter

Line

(AWG)

14

12

10

8

gauge

Indoor-

Line quantity

5

thermostat

signal line

Line diameter (AWG)

18

Outdoor-

Line quantity

5

thermostat

signal line

Line diameter (AWG)

18

55

Part 5 Troubleshooting
1. Control logic description …………………………………………………………57 2. Sensor……………………………………………………………………………………57 3. Exploded views ………………………………………………………………………57 4. Main PCB Ports ………………………………………………………………………61 5. Fault code table ………………………………………………………………………64 6. Troubleshooting ……………………………………………………………………..65
56

1. Control logic description
The fixed speed system adopts the same control communication command as that of common heat pump and air conditioning unit, it is the 24V control command.
2. Sensor
T3 (Outdoor coil temperature) T4 (ambient temperature) T5 (compressor discharge temperature)
3. Exploded views
Cooling only outdoor unit:

No.

Part Name

1 Top air outlet grille

2 Fan motor

3 Axial-flow fan

4 Top cover

5 Right side panel

6 Condenser assembly

6.1 Condenser component

6.2 Shunt components

6.3 Gas collector assembly

6.4 High pressure valve assembly

7 Electronic control part

7.1 Electronic control mounting plate

7.2 PCB mounting base

Quantity 1 1 1 1 1 1 1 1 1 1 1 1 1

No.

Part Name

7.3 AC contactor

7.4 Compressor capacitor

7.5 Fan capacitor

7.6 Brass binding post

8 Upper side panel

9 Gas return pipe assembly

10 Exhaust pipe assembly

11 Lower side panel

12 Base pan components

13 Compressor

14 Left side panel

15 Support plate

Quantity 1 1 1 1 1 1 1 1 1 1 1 1

57

Heat pump outdoor unit:

No.

Part Name

1 Top air outlet grille

2 Fan motor

3 Axial-flow fan

4 Top cover

5 Right side panel

6 Condenser assembly

6.1 Condenser component

6.2 Shunt components

6.3 Gas collector assembly

6.4 High pressure valve assembly

7 Electronic control part

7.1 Electronic control mounting plate

7.2 PCB mounting base

7.3 PCB

7.4 AC contactor

7.5 Compressor capacitor

Quantity 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

No.

Part Name

7.6 Fan capacitor

7.7 Brass binding post

7.8 Ambient temperature sensor

8 Upper side panel

9 4-way valve assembly

10 Gas return pipe assembly

11 Lower side panel

12 Base pan components

13 Compressor

14 Gas-liquid separator

15 Left side panel

16 Support plate

17 Crankshaft heating belt

18 Condenser temperature sensor

19 Discharge temperature sensor

20 4-way valve coil

Quantity 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

58

Regular Air Handler:

No.

Part Name

1

Base pan cotton sticking assembly

2

Drain pan support plate cotton sticking assembly

3 Wind wheel fixing plate

4 Left side panel of air duct 5 Right side panel of air duct 6 Electric heater sealing plate 7 Front side panel of air duct 8 Wind wheel mounting block 9 Motor fixing beam assembly 10 Motor clamp

11 Fan motor

12 Wind wheel volute 13 Evaporator fixing plate 1

14 Evaporator

15 Evaporator water baffle 1

16

Plastic drain pan cotton sticking assembly

17

Sheet metal drain pan cotton sticking assembly

18

Evaporator sealing plate cotton sticking assembly

19 Evaporator fixing plate 2

Quantity 1
4
1 1 1 2 1 2 3 1 1 1 1 2 2 1
1
1 1

No.

Part Name

20 Connecting plate

21 Evaporator water baffle 3

22

Evaporator gas collector pipe assembly

23 Evaporator shunt pipe assembly

24 Evaporator connecting plate

25 Evaporator water baffle 2

26 Brass binding post

27 Electric control mounting plate

28 PCB

29 Transformer

30

Piping cover cotton sticking assembly

31 Drain pan fixing block

32 Support bar

33

Electric control box cover cotton sticking assembly

34 Circuit breaker sealing plate

35

Upper side panel cotton sticking assembly

36

Lower side panel cotton sticking assembly

37 Filter cover

Quantity 2
1
1 1 2 1 1 1 1 1 1 1 2 1 1 1
1
1

59

Front Return Air Handler:

No.

Part Name

1

Electric control cover cotton sticking assembly

2

Upper side panel cotton sticking assembly

3

Sealing plate cotton sticking assembly

4 Lower reinforcement plate

5

Lower side panel cotton sticking assembly

6 Transformer

7 PCB

8 Brass binding post

9 Electric heater sealing plate

10 Motor fixing beam assembly

11 Fan motor

12 Limit plate 13 Drain pan support plate 14 Rear side panel of air duct 15 Electric control mounting plate

Quantity 1
1
1 1 1 1 1 1 1 3 1
1 1 1 1

No.

Part Name

16

Volute fixing plate cotton sticking assembly

17 Air duct panel

18 Wind wheel volute

19 Evaporator

20 Motor clamp

21 Evaporator left connecting plate

22 Filter rail

23 Drain pan fixing block

24

Plastic drain pan cotton sticking assembly

25 Rear mounting plate

26

Evaporator right connecting plate

27

Base pan cotton sticking assembly

28 Evaporator shunt pipe assembly

29

Evaporator gas collector pipe assembly

Quantity 1
1
1 1 1 1 2 2 1 2 1
1 1 1

60

4. Main PCB Ports
For 18K-48K heat pump models:
1

13 12

11 10 9 2
3 4

5

6

No.

Content

1 Power (L1)

2 AC fan motor

3 Crankshaft heating belt

4 4-way valve coil

5 Compressor

6 Defrost signal

7 24V control port

7

8

No.

Content

8 24VAC common

9 T4 temperature sensor

10 T3 temperature sensor

11 T5 temperature sensor

12 High pressure switch

13 Low pressure switch

61

For 60K heat pump model:

1

12 11 10 9 8 7

6

5 4

2

No.

Content

1 Power (L2)

2 DC fan motor

3 Temperature sensor group

4 High pressure switch

5 Low pressure switch

6 24V control port

3

No.

Content

7 24VAC power

8 Power (L2)

9 Crankshaft heating belt

10 4-way valve coil

11 Compressor

12 Power (L1)

62

For indoor units:

1

10

9

8 7

2

No. 1 Power 2 E-heater 3 24V control port 4 24VAC common 5 24VAC common

Content

6
5 4

3

No.

Content

6 24VAC power

7 Reserved

8 Reserved

9 ECM fan motor

10 AC fan motor

63

5. Fault code table
No Fault: Green light flashes
Red light off
System fault: Green light flashes
Red light on

Dispay Green light flashes slowly
Green light normally on
(T3) Temperature sensor fault (T4) Temperature sensor fault (T5) Temperature sensor fault
Low pressure fault High pressure fault (T3) High temperature protection (T5) High exhaust temperature
protection DC fan not connected fault

Description Normal standby Normal running Green light flashes twice every 8 seconds Green light flashes 9 times every 8 seconds Green light flashes 8 times every 8 seconds Green light flashes 6 times every 8 seconds Green light flashes once every 8 seconds Green light flashes 10 times every 8 seconds
Green light flashes 5 times every 8 seconds
Green light flashes 7 times every 8 seconds

64

6. Troubleshooting
(T3) Temperature sensor fault: (T4) Temperature sensor fault:
65

(T5) Temperature sensor fault: Low pressure fault:
66

High pressure fault: (T3) High temperature protection:
67

(T5) High exhaust temperature protection:

DC fan not connected fault:
DC fan motor fault

Check whether the fan motor terminal connection is loose
OK
Check whether outdoor unit is sheltered
OK

Error Error

Connect the terminal well
Remove impurities around outdoor unit

Check whether there is 15VDC(2-6VDC) between white(yellow) and black wires of
fan motor terminal

Error

Check whether wiring is correct, replace the main PCB