International comfort products DLF4A6, DLF4A9, DLC4A6, DLC4A9, DLC4A18 Service Manual

SERVICE MANUAL

R−410A Ductless Split System

Air Conditioner and Heat Pump

MODELS: DLC4(A/H)6−Outdoor, DLF4(A/H)6−Indoor

SIZES: 9K, 12K, 18K, and 24K

INTRODUCTION

This Service Manual provides the necessary information to
service, repair, and maintain the DLF4(A,H), DLC4(A/H)

TABLE OF CONTENTS PAGE

SAFETY CONSIDERATIONS 1........................

MODEL / SERIAL NUMBER NOMENCLATURE 2........

STANDARD FEATURES AND ACCESSORIES 3.........

PHYSICAL DATA 4−7.................................

AHRI CAPACITY RATINGS 8..........................

AIRTHROW DATA 8..................................

SOUND RATINGS 9..................................

DIMENSIONS − INDOOR 10...........................

DIMENSIONS − OUTDOOR 11........................

CLEARANCES 13....................................

SYSTEM OPERATING ENVELOPE 14.................

ELECTRICAL DATA 17...............................

CONNECTION DIAGRAMS 18.........................

WIRING DIAGRAMS 19...............................

REFRIGERATION SYSTEM DIAGRAM 23...............

SYSTEM EVACUATION AND CHARGING 25............

REMOTE CONTROL AND FUNCTIONS 26−27...........

FUNCTION AND CONTROLS 28−31....................

TROUBLESHOOTING 32−59..........................

APPENDIX TABLES 60−62...........................

UNIT REMOVAL PROCEDURES 63....................

Indoor 9k − 12k 115v 64.................................

Outdoor 9k − 12k 115v 75...............................

Indoor 12k − 18k 230v 79................................

Outdoor 12k 230v 85...................................

Outdoor 18k 230v 90...................................

Indoor 24k 230v 96.....................................

Outdoor 24k 230v 102..................................

service agency, or your distributor or branch for information
or assistance. The qualified installer or agency must use
factory−authorized kits or accessories when modifying this
product. Refer to the individual instructions packaged with
the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective
clothing, and work gloves. Use quenching cloth for brazing
operations. Have fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit. Consult local
building codes and National Electrical Code (NEC) for
special requirements.

Recognize safety information. This is the safety−alert

!

!

symbol
instructions or manuals, be alert to the potential for personal
injury.

Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety−alert
symbol. DANGER identifies the most serious hazards which
will result in severe personal injury or death. WARNING
signifies hazards which could result in personal injury or
death. CAUTION is used to identify unsafe practices which
may result in minor personal injury or product and property
damage. NOTE is used to highlight suggestions which will
result in enhanced installation, reliability, or operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.

Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF
position. There may be more than 1 disconnect switch.
Lock out and tag switch with a suitable warning label.

When you see this symbol on the unit and in

!

WARNING

!

WARNING

EXPLOSION HAZARD

Failure to follow this warning could
result in death, serious personal
injury, and/or property damage.

Never use air or gases containing
oxygen for leak testing or
operating refrigerant compressors.
Pressurized mixtures of air or
gases containing oxygen can lead
to an explosion.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock, or other conditions which may cause death, personal
injury, or property damage. Consult a qualified installer,

!

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

Do not bury more than 36 in. (914 mm) of refrigerant
pipe in the ground. If any section of pipe is buried, there
must be a 6 in. (152 mm) vertical rise to the valve
connections on the outdoor units. If more than the
recommended length is buried, refrigerant may migrate
to the cooler buried section during extended periods of
system shutdown. This causes refrigerant slugging and
could possibly damage the compressor at start−up.

CAUTION

421 08 9205 00 2/21/14

MODEL NOMENCLATURE

MODEL SERIES
Position Number 1 2 3 4 5 6 7 8 9 10 11

DLC = Outdoor
DLF = Indoor Outdoor/Indoor

4A6 = AC
4H6 = HP

09 = 9k BTU
12 = 12k BTU
18 = 18k BTU
24 = 24k BTU

J = 115−1−60
K = 208/230−1−60

1A Factory Designation

D L C 4 A 6 0 9 J 1 A

Type

Size

Voltage

2 421 01 9204 01

STANDARD FEATURES AND ACCESSORIES

Ease Of Installation

Mounting Brackets S

Low Voltage Controls S
Comfort Features
Microprocessor Controls S

Wireless Remote Control S
Rapid Cooling/Heating S
Automatic Air Sweep S
Cold Blow Prevention S
Continuous Fan * S
Auto Restart Feature S
Memory Function S
Auto Changeover on Heat Pumps S
Dry Function S

Energy Saving Features

Inverter Driven Compressor S
Sleep Mode S
24 Hour Stop/Start Timer S

Safety And Reliability

Indoor Unit Freeze Protection S
3 Minute Compressor Time Delay S
High Compressor Discharge Temperature S
Low Voltage Protection S
Compressor Overload Protection S
Compressor Over current Protection S
IPM Module Protection S

Ease Of Service And Maintenance

Cleanable Filters S
Diagnostic LED’s On Outdoor Board S
Error Messages Displayed Front Panel S

Application Flexibility

Condensate Pump A

Standard Warranty

7 Year Compressor Limited Warranty** S
5 Year Parts Limited Warranty** S

Legend
S Standard
A Accessory
O Optional
F Field Fabricated

* Cooling Only
** For owner occupied residential applications.

For Commercial applications, warranty is 1 year parts and 5 years
compressor.

INDOOR UNITS

On high wall fan coils, the condensate pump accessory is
recommended when adequate drain line pitch cannot be
provided, or when the condensate must move up to exit.

The pump has a lift capability of 12 ft (3.6 m) on the discharge
side if the pump is mounted in the fan coil or 6 ft (1.8 m) on the
suction side if the pump is remote mounted.

16 ft Transparent Suction/Discharge Tubing 1
Condensate Pump Assembly 1
Low voltage Power Cord 1
Transparent Detection Unit Vent Tubing 1
Power Cable 1
Wire Ties 6
Wall Mount Bracket 1
Adhesive 1
Detection Unit Mounting Bracket 1
⅝-in Rubber Elbow 1
Detection Unit 1

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury
or death.

Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than one disconnect switch. Lock out
and tag switch with a suitable warning label.

Figure 1 - Condensate Pump Accessory

Table 1—Accessory Condensate Pump Kit Contents

Item Qty.

!

WARNING

A07892

3 421 08 9205 00

PHYSICAL DATA − DLC4A6

Outdoor Unit DLC4A6 09 12 12 18 24

System Voltage 115-1-60 208/230-1-60

Control Voltage Low Voltage Pulse DC

Rated Cooling Capacity (Btuh) 9,000 11,800 12,000 18,000 22,000

Cooling. Capacity Range
Min - Max (Btuh)

Operating Weight lb. (kg) 75 (34) 63.8 (30) 112.2 (51)

Refrigerant Type R-410A

Metering Device @ Outdoor Unit Cap. Tube EXV

Charge lb. (kg) 2.3 (1.05) 2.8 (1.27) 2.2 (1.0) 2.8 (1.27) 3.4 (1.55)

Compressor

Type Twin Rotary Inverter Driven

Model KNB092FHBMC QXA-B096ZC190 SNB130FGYMC C-6RZ146H1A

Outdoor Fan

CFM 1060 942 1880 1880

RPM 850 880 690 690

Diameter (in) 15.7 14.6 20.5 20.5

Watts 30 21 60

Outdoor Coil

Face Area (sq.) 4.4 3.7 5.9 6.1

No. Rows 2

Fins per inch 16 18

Refrigerant Lines

Connection Type Flare

Liquid (Mix Phase) in OD 1/4"

Vapor Line in OD 3/8" 1/2"

Maximum Length ft. 50 65 50 82

Max Lift (Fan Coil Above) ft. 33

Max Drop (Fan Coil Below) ft. 33

External Finish White

3,500-11,000 3,300-12,500 3,300-12,500 4,500-21,000 6,400-24,000

421 08 9205 00 4

PHYSICAL DATA CONTINUED − DLF4A6

Indoor Unit DLF4A6 09 12 12 18 24
System Voltage 115 V 208/230-1-60
Control Voltage Low Voltage Pulse DC
Electrical Connections Indoor Unit Powered From Outdoor Unit
Rated Cooling Capacity (Btuh) 9,000 11,800 12,000 18,000 22,000
Operating Weight lb. (kg) 18.7 (8.5) 19.8 (9.0) 26.5 (12.0) 33.1 (15.0)
Refrigerant Type R-410A
Metering Device @ Outdoor Unit Cap. Tube EXV
Moisture Removal Rate (pints/hr.) 1.7 2.9 2.9 3.8 4.5
Indoor Fan
RPM/CFM (Turbo) - Cooling 1300/330 1350/341 1350/341 1400/471 1350/588

RPM/CFM (High) - Cooling 1100/277 1150/288 1150/288 1150/400 1150/471
RPM/CFM (Medium) - Cooling 900/224 950/235 950/235 1000/330 1000/412
RPM/CFM (Low) - Cooling 700/188 750/200 750/200 850/271 850/353
Motor Watts 15 20 35
Blower Quantity … Size (DxL) in 1 … 3.62 x 23.4 1 … 3.9 x 25.6 1 … 3.9 x 30.1

Indoor Coil

Face Area (sq.) 1.93 2.2 2.8
No. Of Rows 2
Fins Per Inch 18 17

Filters

Quantity 2 2 2 2
Controls Integrated Microprocessor
Wireless Remote Standard
Modes Cool/Heat/Dry/Auto
Fan Mode High/Medium/Low/Auto
Emergency Mode Yes
Defrost Method Demand Defrost
Diagnostics Yes
Air Sweep Yes
Soft Start Yes
Rapid Cooling/Heating Ye s
Cold Blow Prevention Yes
Sleep Mode Yes
24 Hour Timer Yes
Auto Restart Yes
Freeze Protection On Indoor Unit Yes

Refrigerant Lines

Connection Type Flare
Liquid (Mix Phase) in OD 1/4"
Vapor Line in OD 3/8" 1/2"
Maximum Length ft. 50 65 50 82
Max Lift (Fan Coil Above) ft. 33
Max Drop (Fan Coil Below) ft. 33

Condensate Drain

Size in ID = 1/2" OD = 5/8"
External Finish White

5 421 08 9205 00

PHYSICAL DATA CONTINUED − DLC4H6

Outdoor Unit DLC4H6 09 12 12 18 24

System Voltage 115-1-60 208/230-1-60

Control Voltage Low Voltage Pulse DC

Rated Cooling Capacity (Btuh) 9,000 11,800 12,000 18,000 22,000

Cooling. Capacity Range
Min - Max (Btuh)

Rated Heating Capacity (Btuh) 9,800 13,000 12,000 19,200 24,200

Heating. Capacity Range
Min - Max (Btuh)

Operating Weight lb (kg) 75 (34) 63.8 (30) 112.2 (51)

Refrigerant Type R-410A

Metering Device @ OD Unit Cap. Tube EXV

Charge lb (kg) 2.2 (1.0) 2.9 (1.3) 3.4 (1.55)

Compressor

Type Twin Rotary Inverter Driven

Model KNB092FHBMC QXA-B096ZC190 SNB130FGYMC C-6RZ146H1A

Outdoor Fan

CFM 1060 942 1880 1880

RPM 850 880 690 690

Diameter (in) 15.7 14.6 20.5 20.5

Watts watts 30 21 60

Outdoor Coil

Face Area (sq. ft) 4.4 3.7 5.9 6.1

No. Rows 2

Fins per inch 16 18

Refrigerant Lines

Connection Type Flare

Liquid (Mix Phase) in OD 1/4"

Vapor Line in OD 3/8" 1/2"

Maximum Length ft 65 50 82

Max Lift (Fan Coil Above) ft 33

Max Drop (Fan Coil Below) ft 33

External Finish White

3,500 - 11,000 3,300 - 12,500 3,300 - 12,500 4,500 - 21,000 6,400 - 24,000

2,500 - 11,000 3,400 - 13,500 3,400 - 13,500 4,000 - 23,000 4,100 - 24,200

421 08 9205 00 6

PHYSICAL DATA CONTINUED − DLF4H6

Indoor Unit DLF4H6 09 12 12 18 24
System Voltage 115 V 208/230-1-60
Control Voltage Low Voltage Pulse DC
Electrical Connections Indoor Unit Powered From Outdoor Unit
Rated Cooling Capacity (Btuh) 9,000 11,800 12,000 18,000 22,000
Rated Heating Capacity (Btuh) 9,800 13,000 12,000 19,200 24,200
Operating Weight lb (kg) 18.7 (8.5) 19.8 (9.0) 26.5 (12.0) 33.1 (15.0)
Refrigerant Type R-410A
Metering Device @ Outdoor Unit Cap. Tube EXV @ Outdoor Unit
Moisture Removal Rate(pints/hr) 1.7 2.9 3.8 4.2
Indoor Fan
RPM/CFM (Turbo) - Cooling 1300/330 1350/341 1350/341 1400/471 1350/588

RPM/CFM (High) - Cooling 1100/277 1150/288 1150/288 1150/400 1150/471
RPM/CFM (Medium) - Cooling 900/224 950/235 950/235 1000/330 1000/412
RPM/CFM (Low) - Cooling 700/188 750/200 750/200 850/271 850/353
RPM/CFM (Turbo) - Heating 1300/330 1350/341 1350/341 1450/471 1350/588
RPM/CFM (High) - Heating 1150/277 1200/288 1200/288 1250/400 1150/471
RPM/CFM (Medium) - Heating 980/224 1000/235 1000/235 1100/330 1000/412
RPM/CFM (Low) - Heating 820/188 850/200 850/200 950/271 900/353
Motor Watts 15 20 35
Blower Quantity … Size (DxL) in 1 … 3.62 x 23.4 1 … 3.9 x 25.6 1 … 3.9 x 30.1

Indoor Coil

Face Area (sq.ft) 1.93 2.2 4.2
No. Of Rows 2
Fins Per Inch 18 17

Filters

Quantity 2 2 2 2
Controls Integrated Microprocessor
Wireless Remote Standard
Modes Cool/Heat/Dry/Auto
Fan Mode High/Medium/Low/Auto
Emergency Mode Yes
Defrost Method Demand Defrost
Diagnostics Yes
Air Sweep Yes
Soft Start Yes
Rapid Cooling/Heating Yes
Cold Blow Prevention Yes
Sleep Mode Yes
24 Hour Timer Yes
Auto Restart Yes
Freeze Protection On Indoor Unit Yes

Refrigerant Lines

Connection Type Flare
Liquid (Mix Phase) in OD 1/4"
Vapor Line in OD 3/8" 1/2"
Maximum Length ft 65 50 82
Max Lift (Fan Coil Above) ft 33
Max Drop (Fan Coil Below) ft 33

Condensate Drain

Size in ID = 1/2" OD = 5/8"
External Finish White

7 421 08 9205 00

AHRI* CAPACITY RATINGS

Model Numbers Cooling High Heating 47°F Low Heating 17°F

Outdoor Unit Indoor Unit

Capacity

(Btuh)

EER SEER

Capacity

(Btuh)

HSPF Capacity (Btuh)

DLC4A609J1A DLF4A609J1A 9,000 12.0 16.0 - - ­DLC4A612J1A DLF4A612J1A 11,800 9.4 16.0 - - ­DLC4A612K1A DLF4A612K1A 12,000 9.8 16.0 - - ­DLC4A618K1A DLF4A618K1A 18,000 11.1 16.0 - - ­DLC4A624K1A DLF4A624K1A 22,000 10.0 16.0 - - ­DLC4H609J1A DLF4H609J1A 9,000 12.0 16.0 9,800 8.6 5,400

DLC4H612J1A DLF4H612J1A 11,800 9.4 16.0 13,000 8.6 8,500
DLC4H612K1A DLF4H612K1A 12,000 9.8 16.0 12,000 8.5 6,800
DLC4H618K1A DLF4H618K1A 18,000 11.1 16.0 19,200 8.0 12,000
DLC4H624K1A DLF4H624K1A 22,000 10.0 16.0 24,200 8.5 18,600

*Air Conditioning, Heating & Refrigeration Institute

- = N/A

Legend
HSPF - Heating Seasonal Performance Factor
SEER - Seasonal Energy Efficiency Ratio
NOTES:

1. Ratings are net values reflecting the effects of circulating fan heat. Ratings are based on: Cooling Standard: 80F (26.67C) db, 67F (19.44C) wb air entering indoor
unit and 95F (35C) db air entering outdoor unit. High Temperature Heating Standard: 70F (21.11C) db air entering indoor unit and 47F (8.33C) db, 43F (6.11C)
wb air entering outdoor unit.

2. Ratings are based on 25 ft. (7.62 m) of interconnecting refrigerant lines.

3. All system ratings are based on fan coil units operating at high fan speed. Consult Physical Data tables for air flows at all available fan speeds.

AIR THROW DATA

Approximate Air Throw ft. (m)

Unit Size

9 K 18 (5.5) 21 (6.4) 23 (7.0) 28 (8.5)
12 K 20 (6.1) 23 (7.0) 25 (7.6) 30 (9.1)
18 K 22 (6.7) 27 (8.2) 33 (10.1) 39 (11.9)
24 K 25 (7.6) 29 (8.8) 34 (10.4) 42 (12.8)

Low Medium High Turbo

421 08 9205 00 8

SOUND RATINGS

Outdoor Units

Model Number Sound Power dBA Sound Pressure dBA

DLC4A609J1A 63 53

DLC4A612J1A 65 55

DLC4A612K1A 62 52

DLC4A618K1A 66 56

DLC4A624K1A 63 53

DLC4H609J1A 63 53

DLC4H612J1A 65 55

DLC4H612K1A 62 52

DLC4H618K1A 66 56

DLC4H624K1A 66 56

Indoor Units

Low Medium High Turbo

Model Number

DLF4A609J1A 42 32 45 35 47 37 50 40

DLF4A612J1A 42 32 45 35 47 37 50 40

DLF4A612K1A 38 28 43 33 49 39 54 44

DLF4A618K1A 44 34 48 38 53 43 58 48

DLF4A624K1A 44 34 49 39 53 43 59 49

DLF4H609J1A (cool/heat) 42/42 32/32 45/45 35/35 47/47 37/37 50/50 40/40

DLF4H612J1A (cool/heat) 42/42 32/32 45/45 35/35 47/47 37/37 50/50 40/40

DLF4H612K1A (cool/heat) 38/38 28/28 43/43 33/33 49/49 39/39 54/54 44/44

DLF4H618K1A (cool/heat) 44/44 34/34 48/48 38/38 53/53 43/43 58/58 48/48

DLF4H624K1A (cool/heat) 44/44 34/34 49/49 39/39 53/53 43/43 59/59 49/49

NOTES:

1. Sound power ratings are per AHRI 270 and AHRI 350

2. Sound pressure ratings are estimated sound pressure, 3 feet (.91 m) from the unit, based on sound power data.

Sound
Power

dBA

Sound

Pressure

dBA

Sound
Power

dBA

Sound

Pressure

dBA

Sound
Power

dBA

Sound

Pressure

dBA

Sound
Power

dBA

Sound

Pressure

dBA

9 421 08 9205 00

DIMENSIONS − INDOOR

Unit Size

9 K 30.3 (770) 11.1 (283) 7.9 (201) 18.7 (8.5)
12 K 30.3 (770) 11.1 (283) 7.9 (201) 19.8 (9.0)
18 K 34.0 (865) 12.0 (305) 8.5 (215) 26.4 (12)
24 K 39.7 (1008) 12.6 (319) 8.7 (221) 33.1 (15.0)

DIMENSIONS − OUTDOOR

W

In. (mm)

WD

H

A12377

H

In. (mm)

D

In. (mm)

Net Operating Weight

Lbs. (Kg)

Figure 2 - Indoor Unit Dimensions

30.0 (762)

10.1 (257)

Unit: IN. (mm)

33.4 (848)

11.7 (267)

21.3 (540)

Figure 3 - 9K and 12K 115V (Net Operating Weight: 75 lbs. / 34 kg)

21.3 (540)

12.6 (320)

A12531

421 08 9205 00 10

DIMENSIONS − OUTDOOR

10.8 (274)

25.9 (658)

21.7 (551)

Unit: IN. (mm)

28.0 (711)

18.5 (470)

11.8 (300)

Figure 4 - 12K 230V (Net Operating Weight: 63.8 lbs. / 30 kg)

12.5 (318)

Unit: IN. (mm)

A12532

11 421 08 9205 00

13.4 (340)

35.0 (890)

27.6 (700)

Unit: IN. (mm)

37.9 (963)

22.0 (560)

14.3 (364)

Figure 5 - 18K and 24K (Net Operating Weight: 112.2 lbs. / 51 kg)

15.6 (396)

A12533

421 08 9205 00 12

CLEARANCES

Indoor Unit

Distance to Ceiling

6 in (152 mm)

Distance to Wall

6 in (152 mm)

Distance in Front of Unit

118 in (2997 mm)

●

The clearance dimensions are necessary for a correct installation

Distance to Floor

66 in (1676 mm)

and are the minimum permissible distances to adjacent structures.

Outdoor Unit

Distance to Wall

6 in (152 mm)

NOTE: Refrigerant lines
may be routed in any of the
(4) directions, right,
right rear, left, or left rear.
See instructions for details

Distance to
Back Wall
12 in (305 mm)

Air Discharge Side

79 in (2007 mm)

Figure 6 - Indoor and Outdoor Unit Clearances

13 421 08 9205 00

Above Unit

20 in (508 mm)

Air Inlet Side

12 in (305 mm)

Distance to Wall

20 in (508 mm)

valve cover

A12385

SYSTEM OPERATING ENVELOPE

64.4ºF

75ºF

5ºF

113ºF

Heating

5ºF

75ºF

5ºF

86ºF

109ºF

Supply Voltage 115-1-60 AC 208/230-1-60 AC

Model 9k 12k 12k 18k 24k

Indoor Operating Range (A/C and
HP) °F (°C)

Cooling Ambient Operating Range
(A/C) °F (°C)

Cooling Ambient Operating Range
(HP) °F (°C)

Heating Ambient Operating Range
(HP) °F (°C)

64 - 113
(18 - 45)

64 - 113
(18 - 45)

5 - 75

(-15 - 24)

64 - 113

(18 - 45)

64 - 113

(18 - 45)

5 - 75

(-15 - 24)

See Figure 7 8 9 10 & 11

120

110

100

90

86ºF

80

Heating

Continuous

Indoor Temperature (°F)

70

Operation

61 - 86 (16 - 30)

5 - 109

(-15 - 43)

5 - 109

(-15 - 43)

5 - 75

(-15 - 24)

Cooling

Continuous

Operation

5 - 118

(-15 - 48)

5 - 118

(-15 - 48)

19 - 75

(-7 - 24)

86ºF

5 - 118

(-15 - 48)

5 - 115

(-15 - 46)

19 - 75

(-7 - 24)

61ºF

60

50

40

-10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140

Outdoor Temperature (°F)

61ºF

Figure 7 - 9k / 12k 115V System Operating Envelope

120

110

100

90

86ºF

Indoor Temperature (°F)

80

Continuous

70

61ºF

60

Operation

Cooling

Continuous

Operation

61ºF

50

40

-10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140

421 08 9205 00 14

Outdoor Temperature (°F)

Figure 8 - 12k 230V System Operating Envelope

SYSTEM OPERATING ENVELOPE CONTINUED

Heating

5ºF

75ºF

19ºF

86ºF

118ºF

Cooling

5ºF

118ºF

120

110

100

90

80

Continuous

Indoor Temperature (°F)

70

Operation

86ºF

Cooling

Continuous

Operation

61ºF

60

50

40

-10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140

Outdoor Temperature (°F)

61ºF

Figure 9 - 18k 230V System Operating Envelope

120

110

100

F)

°

90

86ºF

80

Continuous

70

Indoor Temperature (

60

Operation

61ºF

50

40

-10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140

Figure 10 - 24k AC 230V System Operating Envelope

15 421 08 9205 00

Outdoor Temperature (°F)

SYSTEM OPERATING ENVELOPE CONTINUED

Heating

50ºF

75ºF

5ºF

86ºF

118ºF

120

110

100

F)

°

90

80

70

Indoor Temperature (

Continuous

Operation

86ºF

Cooling

Continuous

Operation

61ºF

60

50

40

-10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140

Outdoor Temperature (°F)

61ºF

Figure 11 - 24k HP 230V System Operating Envelope

421 08 9205 00 16

ELECTRICAL DATA

Cooling Only

Operating

System Voltage

Unit

Size

9 K 115 -1 - 60 127/103 9.76 25.00 0.17 30
12 K 115 -1 - 60 127/103 11.20 25.00 0.17 30 15 25
12 K 208/230-1-60 253/187 7.30 16.50 0.25 21 208/230 0.19 15 10 15
18 K 208/230-1-60 253/187 10.86 27.00 0.62 60 208/230 0.32 20 15 25
24 K 208/230-1-60 253/187 11.71 41.00 0.62 60 208/230 0.45 35 16 25

Heat Pump

9 K 115-1-60 127/103 9.76 20.00 0.17 30
12 K 115-1-60 127/103 11.20 20.00 0.17 30 15 25
12 K 208/230-1-60 253/187 7.30 16.50 0.25 21 208/230 0.19 15 10 15
18 K 208/230-1-60 253/187 10.86 27.00 0.62 60 208/230 0.32 20 15 25
24 K 208/230-1-60 253/187 12.50 41.00 0.62 60 208/230 0.45 35 17 25

* Permissible limits of the voltage range at which the unit will operate satisfactorily
 Indoor fan powered from outdoor unit.

LEGEND
FLA - Full Load Amps
LRA - Locked Rotor Amps
MCA - Minimum Circuit Amps
RLA - Rated Load Amps
MOCP- Maximum Over Current Protection

Voltage*

MAX /

MIN

Compressor Outdoor Fan Indoor Fan{

RLA LRA FLA W VOLTS FLA W

115 0.38 15

115 0.38 15

MCA

13 20

13 20

WIRING

Power Wiring:

The main power is supplied to the outdoor unit. The field supplied connecting cable from the outdoor unit to indoor unit consists of three
(3) wires and provides the power for the indoor unit. Two wires are high voltage AC power and one is a ground wire.

Consult your local building codes and the NEC (National Electrical Code) or CEC (Canadian Electrical Code) for special requirements.
All wires must be sized per NEC or CEC and local codes. Use Electrical Data table MCA (minimum circuit amps) and MOCP (maximum

over current protection) to correctly size the wires and the disconnect fuse or breakers respectively.
Per caution note, only copper conductors with a minimum 300 volt rating and 2/64−inch thick insulation must be used.

MAX

FUSE/
CB Amp
(MOCP)VOLT-PH-HZ

Control Wiring:

A separate shielded copper conductor only, with a minimum 300 volt rating and 2/64−inch thick insulation, must be used as the
communication wire from from the outdoor unit to the indoor unit.

To minimize voltage drop of the control wire, use the following wire size and maximum lengths shown in the chart below.

Wire Size

18 AWG 50 ft. (15 m)
16 AWG 50 ft (15) to 100 ft. (30 m)

!

CAUTION

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

 Wires should be sized based on NEC and local codes.
 Use copper conductors only with a minimum 300 volt

rating and 2/64 inch thick insulation.

!

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

 Be sure to comply with local codes while running wire
from indoor unit to outdoor unit.

 Every wire must be connected firmly. Loose wiring may
cause terminal to overheat or result in unit malfunction. A

Length

ft (m)

CAUTION

fire hazard may also exist. Therefore, be sure all wiring is
tightly connected.

 No wire should be allowed to touch refrigerant tubing,
compressor or any moving parts.

 Disconnecting means must be provided and shall be
located within sight and readily accessible from the air
conditioner.

 Connecting cable with conduit shall be routed through
hole in the conduit panel.

17 421 08 9205 00

CONNECTION DIAGRAMS

DLC4 18K~24K Outdoor Unit Terminal Block

Control

from

Outdoor

Unit

DLF4 18K~24K Indoor Unit Terminal Block

DLC4/DLF4 18K~24K 208/230-1-60 Connection Diagram

CONNECTING CABLE

OUTDOOR TO INDOOR

Power from

Outdoor Unit

Power to

Indoor Unit

Main Power

Supply

Main Power

Supply

Power from

Outdoor Unit

Power to

Indoor Unit

Control to

Indoor Unit

CAUTION

Attention

Use Copper Conductors Only
With Minimum 300 Volt, 2/64"
Thick Insulation.

Utilisez seulement des
conducteurs en cuivre d'un
minimum de 300 volt d'une
isol at ion d' èpaisseur de 2/64".

Power from

Outdoor Unit

DLC4/DLF4 12K 208/230-1-60 Connection Diagram

Control to

Indoor Unit

Control from

Outdoor Unit

Power from

Outdoor Unit

CONNECTING CABLE

OUTDOOR TO INDOOR

Power to

Indoor Unit

Power to

Indoor Unit

Main Power

Supply

Main Power

Supply

DLC4 12K Outdoor Unit Terminal Block

DLF4 12K Indoor Unit Terminal Block

CAUTION

Attention

Use Copper Conductors Only
With Minimum 300 Volt, 2/64"
Thick Insulation.

Utilisez seulement des
conducteurs en cuivre d'un
minimum de 300 volt d'une
isolation d' èpaisseur de 2/64".

N S L GND N S L GND

NLGND

DLC4H6 9K-12K Heat Pump Outdoor Unit

Terminal Block

DLF4H6 9K-12K Heat Pump Indoor Unit

Terminal Block

Main Power

Supply

Main Power

Supply

DLC4H6/DLF4H6 9K-12K 115-1-60 Heat Pump Connection Diagram

CONNECTING CABLE

OUTDOOR TO INDOOR

Power to

Indoor Unit

Control to

Indoor Unit

Power to

Indoor Unit

Power from

Outdoor Unit

Control from
Outdoor Unit

Power from

Outdoor Unit

CAUTION

Attention

Use Copper Conductors Only
With Minimum 300 Volt, 2/64"
Thick Insulation.

Utilisez seulement des
conducteurs en cuivre d'un
minimum de 300 volt d'une
isol at ion d' èpaisseur de 2/64".

DLC4A6/DLF4A6 9K~12K 115-1-60 Cooling Only Connection Diagram

DLC4A6 9K~12K Outdoor Unit Terminal Block

CONNECTING CABLE

OUTDOOR TO INDOOR

Power to

Indoor Unit

Power to

Indoor Unit

Power from

Outdoor

Unit

Power from

Outdoor

Unit

Control to

Indoor Unit

Control

from

Outdoor

Unit

Main

Power

Supply

Main
Power
Supply

DLF4A6 9K~12K Indoor Unit Terminal Block

CAUTION

Attention

Use Copper Conductors Only
With Minimum 300 Volt, 2/64"
Thick Insulation.

Utilisez seulement des
conducteurs en cuivre d'un
minimum de 300 volt d'une
isol at ion d' èp aisseur de 2/64".

N S L L N GND N S L GND

Ground Ground

115-1-60 Low V DC 115-1-60 115-1-60 115-1-60 115-1-60 Low V DC 115-1-60

Ground Ground

115-1-60 Low V DC 115-1-60 115-1-60 Low V DC 115-1-60

Ground

115-1-60 115-1-60

L2 S L1 GND L2 S L1 GND

Ground Ground

208/230-1-60 Low V DC 208/230-1-60 208/230-1-60 Low V DC 208/230-1-60

L2 L1 GND

Ground

208/230-1-60 208/230-1-60

L2SL1L1L2GND L2SL1GND

Ground Ground

208/230-1-60 Low V DC 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 Low V DC 208/230-1-60

NOTE: Polarity of power wires muct match original connection on outdoor unit.

Figure 12 - Connection Diagrams

421 08 9205 00 18

A13080

19 421 08 9205 00

CONNECTION DIAGRAMS

WIRING DIAGRAMS

A13081

DLF4A609/12

DLC4A609/12

Figure 13 - 9K / 12K Cooling Only 115−1−60

20 421 08 9205 00

CONNECTION DIAGRAMS

A13082

DLF4H609/12J1

A

DLC4H609/12J1

A

Figure 14 - 9K / 12K Heat Pump Only 115−1−60

421 08 9205 00 21

CONNECTION DIAGRAMS

DIAGRAMS CONTINUED

A13083

DLF4H612K1

A

DLC4H612K1

A

Figure 15 - 12k Heat Pump Only 230−1−60

22 421 08 9205 00

CONNECTION DIAGRAMS

A13084

DLF4A618/24K1

A

DLC4A618/24K1

A

Figure 16 - 18K / 24K 230−1−60

REFRIGERATION SYSTEM DIAGRAMS

GAS SIDE

TINU ROODTUOTINU ROODNI

HEAT
EXCHANGE
(EVAPORATOR)

3-WAY VALVE

LIQUID SIDE

2-WAY VALVE

Muffler

Discharge

Suction

COMPRESSOR

Accumlator

HEAT
EXCHANGE
(CONDENSER)

Capillary

Figure 17 - Refrigeration System Diagram DLC/DLF4A6 Cooling Only

9k / 12k − 115v; 12k / 18k − 230v

TINU ROODTUOTINU ROODNI

reniartSreniartS

COOLING

A13086

GAS SIDE

3-WAY VALVE

HEAT
EXCHANGE
(EVAPORATOR)

LIQUID SIDE

2-WAY VALVE

Figure 18 - Refrigeration System Diagram DLC/DLF4H6

Refrigerant Pipe Diameter:
9k / 12k − Liquid: 1/4” (6.4 mm) Gas: 3/8” (9.5 mm)

18k − Liquid: 1/4” (6.4 mm) Gas: 1/2” (12.7 mm)

Discharge

Suction

COMPRESSOR

12k / 18k − 230v

4-Way valve

Muffler

Accumlator

HEAT
EXCHANGE
(CONDENSER)

Capillary reniartSreniartS

COOLING

HEATING

A13087

23 421 08 9205 00

REFRIGERATION SYSTEM DIAGRAMS CONTINUED

INDOOR OUTDOOR

GAS SIDE

HEAT
EXCHANGE
(EVAPORATOR)

3-WAY VALVE

LIQUID SIDE

2-WAY VALVE

Muffler

Discharge

Suction

COMPRESSOR

Accumlator

Electronic Expansion Valve

HEAT
EXCHANGE
(CONDENSER)

Strainer

Figure 19 - Refrigeration System Diagram DLC/DLF4A6 Cooling Only

24k − 230v

TINU ROODTUOTINU ROODNI

COOLING

A13088

GAS SIDE

HEAT
EXCHANGE
(EVAPORATOR)

3-WAY VALVE

LIQUID SIDE

2-WAY VALVE

Muffler

Discharge

Suction

COMPRESSOR

Accumlator

4-Way valve

Expansion valve

HEAT
EXCHANGE
(CONDENSER)

reniartSreniartS

COOLING

HEATING

Figure 20 - Refrigeration System Diagram DLC/DLF4H6

9k / 12k − 115v; 24k − 230v

Refrigerant Pipe Diameter:
9k / 12k − Liquid: 1/4” (6.4 mm) Gas: 3/8” (9.5 mm)

24k − Liquid: 1/4” (6.4 mm) Gas: 1/2” (12.7 mm)

24 421 08 9205 00

A13089

SYSTEM EVACUATION AND CHARGING

t

Deep Vacuum Method

!

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment
damage or improper operation.

Never use the system compressor as a vacuum pump.

Refrigerant tubes and indoor coil should be evacuated using
the recommended deep vacuum method of 500 microns. The
alternate triple evacuation method may be used if the
procedure outlined below is followed. Always break a vacuum
with dry nitrogen.

SYSTEM VACUUM AND CHARGE

Using Vacuum Pump

(1.) Completely tighten flare nuts A, B, C, D, connect

manifold gage charge hose to a charge port of the
low side service valve. (See Fig. 21.)

(2.) Connect charge hose to vacuum pump.

(3.) Fully open the low side of manifold gage. (See Fig.

22)

(4.) Start vacuum pump

(5.) Evacuate using either deep vacuum or triple

evacuation method.

(6.) After evacuation is complete, fully close the low side

of manifold gage and stop operation of vacuum
pump.

(7.) The factory charge contained in the outdoor unit is

good for up to 25 ft. (8 m) of line length. For
refrigerant lines longer than 25 ft (8 m), add 0.1 oz.
per foot of extra piping up to allowable maximum
length listed in physical data.

(8.) Disconnect charge hose from charge connection of

the low side service valve.

(9.) Fully open service valves B and A.

(10.) Securely tighten caps of service valves.

Outdoor Unit

Service Valve

CAUTION

Refrigerant

Low Side

A

High Side

B

Figure 21 - Service Valve

The deep vacuum method requires a vacuum pump capable
of pulling a vacuum of 500 microns and a vacuum gage
capable of accurately measuring this vacuum depth. The
deep vacuum method is the most positive way of assuring a
system is free of air and liquid water. (See Fig. 23)

Triple Evacuation Method

The triple evacuation method should only be used when
vacuum pump is only capable of pumping down to 28 in. of
mercury vacuum and system does not contain any liquid
water.
Refer to Fig. 24 and proceed as follows:

Indoor Uni

C

D

A07360

5000
4500
4000
3500
3000
2500
2000

MICRONS

1500
1000

500

01234567

MINUTES

LEAK IN
SYSTEM

VACUUM TIGHT
TOO WET

TIGHT
DRY SYSTEM

A95424

Figure 23 - Deep Vacuum Graph

(1.) Pump system down to 28 in. of mercury and allow

pump to continue operating for an additional 15

minutes.
(2.) Close service valves and shut off vacuum pump.
(3.) Connect a nitrogen cylinder and regulator to system

and open until system pressure is 2 psig.
(4.) Close service valve and allow system to stand for 1

hr. During this time, dry nitrogen will be able to diffuse

throughout the system absorbing moisture.
(5.) Repeat this procedure as indicated in Fig. 24. System

will then be free of any contaminants and water

vapor.

EVACUATE

BREAK VACUUM WITH DRY NITROGEN

WAIT

EVACUATE

BREAK VACUUM WITH DRY NITROGEN

Manifold Gage

500 microns

Low side valve

Charge hose

Low side valve

High side valve

Charge hose

Figure 22 - Manifold

421 08 9205 00 25

Vacuum pump

A07361

WAIT

EVACUATE

CHECK FOR TIGHT, DRY SYSTEM

(IF IT HOLDS DEEP VACUUM)

RELEASE CHARGE INTO SYSTEM

A95425

Figure 24 - Triple Evacuation Method

Final Tubing Check
IMPORTANT: Check to be certain factory tubing on both

indoor and outdoor unit has not shifted during shipment.
Ensure tubes are not rubbing against each other or any
sheet metal. Pay close attention to feeder tubes, making
sure wire ties on feeder tubes are secure and tight.

REMOTE CONTROL AND FUNCTIONS

ON/OFF

(1)

Press to start or stop operation

AUTO

FAN

AIR

HEALTH

OPER

X-FAN

HUMIDITY

FILTER

TURBO

(1) (2)

(3)

(5)

ON/OFF

FAN

HOUR

ON/OFF

MODE

(4)

(6)

(2) MODE
Press to select operation mode

(AUTO/COOL/DRY/FAN/HEAT)

(3) - : Press to decrease temperature setting
(4) +: Press to increase temperature setting
(5) FAN

Press to set fan speed

(6) Horizontal Swing

Press to activate horizontal swing or set louver positions

(7) HEALTH|SAVE (Not Available)

(8) Vertical Swing (Not Available)
(9) X-FAN

Press to activate or deactivate DRY function

(10) TEMP
Press to alternate between set point and room temperature display
(11) TIMER
Press to set TIMER ON/ TIMER OFF
(12) TURBO

Press to activate or deactivate TURBO mode

(13) SLEEP

Press to activate or deactivate SLEEP mode

(14) LIGHT

Press to activate or deactivate display panel light

(7)

(9)

(12)

X-FAN

TURBO

(10)

(13)

TEMP

SLEEP

TIMER

LIGHT

(8)

(11)

(14)

A12390

Remote Control

26 421 08 9205 00

Remote Control Display

3

1

MODE DISPLAY

AUTO
COOL
DRY
FAN
HEAT

8

4

10

15

2

11

6

9

5

SLEEP

14 1312

7

A12391

NOTE: Symbols shown in this manual are for the purpose of demonstration. During actual operation, only the
relevant symbols are displayed.

1. TRANSMISSION INDICATOR: Illuminates when re-
mote control transmits signals to the indoor unit.

2. This symbol appears when the unit is turned on by
the remote control, and disappears when the unit is
turned off.

3. FAN SPEED DISPLAY: Indicates the set fan speed.
AUTO is displayed when unit is running in AUTO
mode.

4. MODE DISPLAY: Indicates the current operation
mode “AUTO”, “COOL”, “DRY”, “FAN ONLY”, or
“HEAT”

5. SLEEP DISPLAY: Indicates unit is running in SLEEP
mode.

6. TEMPERATURE DISPLAY: Temperature setting
from 61F (16C) to 86F (30C) will be displayed.
If FAN mode is selected, there will be no temperature
displayed. During DEFROST operation, H1 will be
displayed. During SAVE mode, SE will be displayed.

7. Left/Right Louver Swing: Not available on these
models.

8. HEALTH/SAVE: HEALTH is not available. SAVE is
available on sizes 18k and 24k. SAVE mode can be
applied to cooling mode and when set point is less
than 80F (27C).

9. SETTING ON / OFF TIMES: 0.5 to 24 hours.

10. TURBO DISPLAY: Displayed when unit is running in
TURBO mode.

11. DRY COIL DISPLAY: Indicates unit is running in DRY
COIL mode where the fan continues to run after the
unit is shut off to dry the coil.

12. TEMPERATURE DISPLAY: Displays set point or
room temperature.

13. SWING DISPLAY: Sets louver position or set louvers
to continuously move for better air distribution.

14. LIGHT DISPLAY: Indicates if LED display on the front
panel is illuminated or not.

15. LOCK DISPLAY: Indicates if remote control is locked.

Battery Installation

Two AAA 1.5 v alkaline batteries (included) are required for
operation of the remote control.

To install or replace batteries :

1. Slide the back cover off the control to open the battery
compartment.

2. Remove old batteries if you are replacing the batter­ies.

3. Insert batteries. Follow the polarity markings inside
the battery compartment.

4. Replace battery compartment cover.

A08299

NOTE:

1. When replacing batteries, do not use old batteries or a
different type battery. This may cause the remote control to
malfunction. 2.If the remote is not going to be used for
several weeks, remove the batteries. Otherwise battery
leakage may damage the remote control.

3. The average battery life under normal use is about 6
months.

4. Replace the batteries when there is no audible beep from
the indoor unit or if the Transmission Indicator fails to light.

421 08 9205 00 27

FUNCTION AND CONTROLS

Description of Each Control Operation

Temperature Parameters

Indoor preset temperature (T
Indoor ambient temperature (T

Basic Functions

Once energized, in no case should the compressor be
restarted within less than 3 minutes. In the situation that
memory function is available, for the first energization, if the
compressor is at stop before de−energization, the compressor
will be started without a 3−minute lag; if the compressor is in
operation before de−energization, the compressor will be
started with a 3−minute lag; and once started, the compressor
will not be stopped within 6 minutes regardless of changes in
room temperature;

Cooling Mode

Working Conditions and Cooling Process.
When T

amb . Tpreset, the unit will enter cooling operation, in

which case the indoor fan, the outdoor fan and the
compressor will work and the indoor fan will run at preset
speed.
When Tamb v Tpreset −3.6F , the compressor will stop, the
outdoor fan will stop with a time lag of 30 seconds (60
seconds for 30k and 36k units), and the indoor fan will run at
preset speed.
When T

preset −3.6F < Tamb. < Tpreset +1.8F, the unit will

remain at its previous state.
Under this mode, the four−way valve will be de−energized
and temperature can be set within a range from 61F to 86F.
If the compressor is shut down for some reason, the indoor
fan and the swing device will operate at original state.

Figure 25 - Cooling Mode

PROTECTION
Antifreeze Protection

Under cooling and dehumidifying mode, 6 minutes after the
compressor is started:
If Tevap v35.6°F, the compressor will operate at reduced
frequency.
If Tevap v30.2°F is detected for duration of 3 minutes, the
compressor will stop, and after 60 seconds, the outdoor fan
will stop; and under cooling mode, the indoor fan and the
swing motor will remain at the original state.

evap. 42.8°F and the compressor has remained at OFF for

If T
at least 3 minutes, the compressor will resume its original
operation state.

preset)

amb.)

Total current up and frequency down protection

If Itotal vA, frequency rise will be allowed; if Itotal ≥ B,
frequency rise will not be allowed; if I
will run at reduced frequency; and if I

total ≥ C, the compressor
total ≥ D, the compressor

will stop and the outdoor fan will stop with a time lag of 30s.
Lag will be 60s for size 30 and 36 units.

Total Current Table

Unit Size - V

9k115V 10A 12A 14A 16A
12K115V 14A 16A 18A 20A
12K230V 6A 7A 8A 9A
18k230V 8A 9A 10A 11A
24K230V 10A 11A 12A 13A

A B C D

Variables

Heating Mode

Working Conditions and Heating Process

amb. v Tpreset +3.6°F , the unit enters heating mode, in

If T
which case the four−way valve, the compressor and the
outdoor fan will operate simultaneously, and the indoor fan will
run at preset speed in the condition of preset cold air
prevention.

amb. ≥ Tpreset +9°F , the compressor will stop, the outdoor

If T
fan will stop with a time lag of 60s, and the indoor fan will stop
after 60−second blow at low speed

preset +3.6°F < Tamb. < Tpreset +9°F , the unit will maintain

If T
its original operating status.
Under this mode, the four−way valve is energized and
temperature can be set within a range of 61°F − 86°F. The
operating symbol, the heating symbol and preset temperature
are revealed on the display.

Defrost Mode

Condition and Defrost Process
When Toutdoor amb
hour, if Toutdoor tube

. ≥41°F and the compressor has run for 3

< 0°F is continuously detected for 1

minute, the unit will enter defrost. [Note: the accumulated time
is cleared if one of the below condition is met. Toutdoor ambient >
41°F, the compressor starts up after switching to cooling or
dry mode, when defrosting is finished; for other situations
besides above conditions, the accumulated time will not be
cleared (including the unit stops when reaching the
temperature point, the unit stops for protection, switching to
fan mode, et. )]
When duration of successive heating operations is more than
45 minutes, or accumulated heating time IS more than 90
minutes,
and one of the following conditions is reached, the unit will
enter the defrost mode after 3 minutes.

Toutdoor amb. >41°F, Toutdoor tube v28.4°F

a.

b. 28.4°F vToutdoor amb. <41°F, Toutdoor tube v21.2°F

c. 23°F

vToutdoor amb. <28.4°F, Toutdoor tube v17.6°F

d. 14°FvTouter amb. <23°F, Touter tube − Tcompensatorys

v(Toutdoor amb. −5.4°F)

Toutdoor amb.>14°F Touter tube − Tcompensatorys v(Toutdoor amb.

e.

−

5.4°F)

After energization, for the first defrost, T
is not the first defrost, Tcompensation will be determined by

outdoor pipe when defrost ends.

T

outdoor pipe >35.6°F; Tcompensation = 0°F

a. T

b. Toutdoor pipe v35.6°F; Tcompensation = 5.4°F

compensation = 0°F. If it

28 421 08 9205 00

During defrost, if operation time for compressor doesn’t reach
3 minutes, the condenser will not defrost in the next 2 hours.
At the time of defrost the compressor stops operation, and 30
seconds later, the outdoor fan stops operation. In an
additional 30 seconds, the 4−way valve will stop operation. 30
seconds later, compressor will increase it’s frequency to 85
Hz for defrosting. Defrost will last for 450 seconds, or until the
outdoor pipe ≥ 50°F. When defrost is complete the
compressor will decrease its frequency. 30 seconds later the
compressor will stop operation. In 30 seconds the 4−way
valve will be started up. 60 seconds later the compressor and
outdoor fan will operate.

PROTECTION
Cold air prevention

The unit is started under heating mode (the compressor is
ON):
 In the case of T

indoor amb. <75.2°F : if Ttube v107.6°F and

the indoor fan is stopped, the indoor fan will begin to run at
low speed with a time lag of 2 minutes. Within 2 minutes, if
T

tube >104°F, the indoor fan also will run at low speed; and

after 1−minute operation at low speed, the indoor fan will be
ramped to operation at a preset speed. Within 1−minute of low
speed operation or 2−minutes of non−operation, if

tube>108°F, the fan will run at preset speed.

T
 In the case of Ti

ndoor amb. ≥ 75°F: if Ttube v108°F, the

indoor fan will run at low speed, and after one minute, the
indoor fan will be ramped to preset speed. Within one−minute
low speed operation, if T tube>107.6°F, the indoor fan will be
ramped to preset speed.
Note: T

indoor amb. indicated in  and  refers to, the

indoor ambient temperature before the command to start the
compressor is performed, or after the unit is withdrawn from
defrost and the defrost symbol is cleared.

Total current up and frequency down protection

If the total current I
I

total ≥X frequency rise will not be allowed; if Itotal ≥Y, the

compressor will run at reduced frequency; and if I

total ≤W, frequency rise will be allowed; if

total ≥Z, the

compressor will stop and the outdoor fan will stop with a time
lag of 30s.

Fan Mode

Under the mode, the indoor fan will run at preset speed and
the compressor, the outdoor fan, the four−way valve and the
electric heater will stop.
Under the mode, temperature can be set within a range of
61°F − 86°F.

AUTO Mode

Working conditions and Auto mode process:
Under AUTO mode, standard cooling temperature T
77°F and standard heating temperature T
Once energized, if T
heating mode; if 68°F < T

amb ≤68°F, the unit will be started under

amb.< 77°F, the unit will run under fan

preset is 64.4°F.

mode and the run indicator will be bright; and if T

preset is

amb ≥77°F,

the unit will be started under cooling mode.
Under AUTO mode, if T

amb.wTpreset is detected, the unit will

select to run under cooling mode, in which case the preset
temperature is 77°F; if T

amb.vTpreset −3.6°F, the compressor

will stop, the outdoor fan will stop with a time lag of 1 minute,
and the indoor fan will run at preset speed. If T

preset

–(−3.6°F)< Tamb.< Tpreset , the unit will remain in its original
state.

Under AUTO mode, if Tamb. vTpreset +3.6°F is detected, the
unit will select to run under heating mode, in which case the
preset temperature is 64.4°F; if T

amb.wTpreset +9°F, the

compressor will stop, the outdoor fan will stop with a time lag
of 1 minute, and the indoor fan will blow residual heat; and if
T

preset +3.6°F < Tamb. < Tpreset +9°F, the unit will remain in its

original state. The cooling−only unit will run under fan mode.
Under AUTO mode, if 68°F

< Tamb. < 77°F, the unit will

remain in its original state.

Protection

In cooling operation, protection is the same as that under the
cooling mode.

In heating operation, protection is the same as that under the
heating mode.

When ambient temperature changes, operation mode will be
converted preferentially. Once started, the compressor will
remain unchanged for at least 6 minutes.

Common Protection Functions and Fault Display under

COOL, HEAT, DRY and AUTO Modes

Overload protection

T tube : measured temperature of outdoor heat exchanger
under cooling mode; and measured temperature of indoor
heat
exchanger under heating mode.

1) Cooling overload

tube v 125.6°F, the unit will return to its original

a. If T
operation state.
b. If T tube w 131°F, frequency rise is not allowed.

c. If T tube w136.4°F, the compressor will run at reduced
frequency.
d. If T

tubew143.6°F, the compressor will stop and the indoor

fan will run at preset speed.

2) Heating overload
a. If T

tubev125.6°F, the unit will return to its original operation

state.
b. If T

tube w131°F, frequency rise is not allowed.

c. If T tube w136.4°F, the compressor will run at reduced
frequency.
d. If

T tubew143.6°F, the compressor will stop and the indoor

fan will blow residual heat and then stop.

Exhaust temperature protection of compressor

If exhaust temperature

w208.4°F, frequency is not allowed to

rise.
If exhaust temperature

w217.4°F, the compressor will run at

reduced frequency.
If exhaust temperature
If exhaust temperature

w230°F, the compressor will stop.

w194°F and the compressor has

stayed at stop for at least 3 minutes, the compressor will
resume its operation.

Communication fault

If the unit fails to receive correct signals for 3 minutes, a
communication fault will be registered and the whole system
will stop.

Module protection

Under module protection mode, the compressor will stop.
When the compressor remains at a stop for at least 3 minutes,
the compressor will resume its operation. If module protection
occurs six times in succession, the compressor will not be
started again.

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Overload protection

If temperature sensed by the overload sensor is over 239°F,
the compressor will stop and the outdoor fan will stop with a
time lag of 30 seconds. If the temperature drops below 203°F,
the overload protection will be reset.
If voltage on the DC bus is below 150V or over 420V, the
compressor will stop and the outdoor fan will stop with a time
lag of 30 seconds. When voltage on the DC bus returns to its
normal value and the compressor has stayed at a stop for at
least 3 minutes, the compressor will resume its operation.
Faults of temperature sensors

Description of Sensors Faults

Indoor Ambient
Temperature

Indoor Tube Temperature

Outdoor Ambient
Temperature

Outdoor Tube
Temperature

Exhaust

Overload

The sensor is open or short-circuited for 30
consecutive seconds

The sensor is open or short-circuited for 30
consecutive seconds

The sensor is open or short-circuited for 30
consecutive seconds

The sensor is open or short-circuited for 30
consecutive seconds, and no detection is
performed within 10 minutes after defrost begins

After the compressor has run for 3 minutes, the
sensor is open or short-circuited for 30
consecutive seconds

After the compressor has run for 3 minutes, the
sensor is open or short-circuited for 30
consecutive seconds

(9) Up−and−Down Swinging Control

When the power is turned on, the up−and−down motor will
first move the air deflector to 0 counter−clockwise. The air
outlet will be closed.
After starting the machine, if you don’t set the swinging
function, heating mode and auto−heating mode, the
up−and−down air deflector will move to D clockwise; under
other modes, the up−and−down air deflector will move to L1. If
you set the swing function when you start the machine, then
the deflector will swing between L and D. The air deflector has
7 swing states: Location L, Location A, Location B, Location
C, Location D, Location L to Location D, stop at any location
between L−D (the included angle between L~D is the same).
The air deflector will be closed at 0 location, and the swing is
function only works if the indoor fan is running.

Figure 26 - Swing Angles for Heating and Cooling

NOTE: Refer to Appendix Tables on pages 60-62 for sensor information.

Other Controls
(1) ON/OFF

Press the remote button ON/OFF: the on−off state will be
changed once each time you press the button.

(2) Mode Selection:

Press the remote button MODE, then select: AUTO, COOL,
DRY, FAN, HEAT, or AUTO.

(3) Temperature Setting Option Button

Each time you press the remote button TEMP+ or TEMP−, the
setting temperature will be up or down by 1°F. Regulating
Range: 61−86°F , the button is useless under the AUTO
mode.

(4) Time Switch

You can start and stop the machine according to the setting
time with the remote controller.

(5) SLEEP State Control

a. When the indoor unit is in the COOL or DRY mode, and the
SLEEP mode has been set, after about 1 hour, the
pre−setting T will raise 1.8°F. It will raise another 1.8°F again
after 2 hours. It will raise 3.6°F in 2 hours, then it will run on at
the setting temperature and fan speed.
b. When the indoor unit is in the HEAT mode, and the Timer
has been set, after about 1 hour, the pre−setting T will reduce

1.8°F, and it will reduce another 1.8°F again after 2 hours. It
will reduce 3.6°F in 2 hours, then it will run on at the setting
temperature and blower speed.
c. The set point stays the same under the FAN mode and
AUTO mode.

(6) Indoor Fan Control

The Indoor Fan can be set to HIGH, MED, LOW by remote
control, and the Indoor Fan will be respectively run at high,
medium, low speed. It can also be set as AUTO.
In moisture removal mode, the Indoor Fan will be set to low
speed.

(7) Buzzer Control

The buzzer will send a “Beep” sound when the indoor unit is
powered up or receives the information sent by the remote
control or there is a button pushed.

(8) Auto button

If the controller is on, it will stop when the button is pressed. If
the controller is off, it will start when the button is pressed. The
swing light will be on, and the main unit will run based on the
remote controls current settings.

(10) Display

a. Operation pattern and mode pattern display
All the display patterns will display for a time when the unit is
powered on, the operation indication icon will display in red
under standby status. When the machine is started by remote
controller, the indication icon will light and display the current
operation mode (the mode light includes: Cooling, Heating
and Dry). If you press the light button, all the display icons will
go dark.
b. Double−8 display
According to the settings of the remote control, the display
may show the current temperature (the temperature scope is
from 61°F to 86°F) on the indoor ambient temperature. The
heating and air supply temperature will display 77°F under
auto−mode, the temperature will display 64°F under the
heating mode, and the temperature will display H1 under the
defrosting mode.(If you set the Celsius temperature display,
the display will show according to Celsius temperature)

(11) Protection function and failure display

E2: Freeze−proofing E4: Exhaust protection E5: Over−current
protection
E6: Communication failure E8: Overload protection
F1: Indoor ambient sensor start and short circuit (continuously
measured failure for 30S)
F2: Indoor evaporator sensor start and short circuit
(continuously measured failure for 30S)
F3: Outdoor ambient sensor start and short circuit
(continuously measured failure for 30S)
F2: Outdoor condenser sensor start and short circuit
(continuously measured failure for 30S, and not measured
within 10 minutes after defrosted)
F5: Outdoor exhaust sensor start and short circuit
(continuously measured failure for 30S after the compressor
has operated 3 minutes)
H3: Overload protection of compressor H5: Module protection
PH: High−voltage protection PL: Low−voltage protection
P1: Nominal cooling and heating P2: Maximum cooling and
heating
P3: Medium cooling and heating P0: Minimum cooling and
heating

(12) Drying Function

You may start or stop the dry function under the cooling and
dry modes. Automatic heating and air modes do not support
the dry function).

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