ICP DLF4HH12J1A, DLF4AV09J1A, DLF4HV09J1A, DLF4AH12J1A, DLC4AV12J1A Service Manual

...

Download

R−410A Ductless Split System

Air Conditioner and Heat Pump

INTRODUCTION

SERVICE MANUAL

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

SIZES: 9K, 12K, 18K, 24K, 30K, and 36K

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........................

SPECIFICATIONS 2..................................

MODEL / SERIAL NUMBER NOMENCLATURE 16.......

STANDARD FEATURES AND ACCESSORIES 17........

DIMENSIONS 18.....................................

CLEARANCES 22....................................

SYSTEM OPERATING ENVELOPE 23..................

ELECTRICAL DATA 25...............................

CONNECTION DIAGRAMS 26.........................

WIRING DIAGRAMS 27...............................

REFRIGERATION SYSTEM DIAGRAM 36...............

REFRIGERANT LINES 38.............................

SYSTEM EVACUATION AND CHARGING 39............

CONTROL SYSTEM 40...............................

MODES OF OPERATION 44...........................

TROUBLESHOOTING 47.............................

DIAGNOSTIC CHARTS 48............................

MALFUNCTION ANALYSIS 55.........................

APPENDIX 79.......................................

SAFETY CONSIDERATIONS

Follow all safety codes. Wear safety glasses and work gloves. Keep quenching cloth and fire extinguisher nearby when brazing. Use care in handling, rigging, and setting bulky equipment.

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. In Canada, refer to current editions of the Canadian Electrical Code, CSA 22.1. 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

Installing, starting up, and servicing air−conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should install, start−up, and service this equipment.

Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should be performed by trained service personnel.

When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment.

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 01 9204 00 1/03/13

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS

Model − Indoor Unit DLF4AH09J1A DLF4HH09J1A

Function Cooling Cooling Heating

Rated Voltage 115V 115V

Frequency (Inverter different Compressor speed)

Total Capacity (Inverter different Compressor speed)

Power Input (Inverter different Compressor speed)

Rated Input

Rated Current

Air Volume

High Hz 70 70 63

Standard Hz 41 41 44

Low Hz 15 15 15

High W/Btuh 3100 / 10600 3100 / 10600 3250 / 11100

Standard W/Btuh 2650 / 9000 2650 / 9000 2820 / 9500

Low W/Btuh 1300 / 4435 1300 / 4435 930 / 3200

High W 1050 1050 1100

Standard W 634 634 700

Low W 180 180 220

High W 1050 1050 1100

Standard W 634 634 700

High A 16.8 16.8 17.0

Standard A 7.0 7.0 7.5

CFM 370 370

Dehumidifying Volume I/h 0.8 0.8

EER / C.O.P 14.2 14.2

SEER / HSPF 22 22 / 9.8

Indoor Unit DLF4AH09J1A DLF4HH09J1A

SH r/min 1260 1260 1320

Speed

Fan Motor

Output W 20 20

Capacitor mF 4.0 4.0

RLA A 0.38 0.38

Fan

Evaporator

Swing Motor

Fuse A 3.15 3.15

Sound Pressure Level

Dimension (WxHxD) Inch 33 x 11 x 7 33 x 11 x 7

Dimension of Package (WxHxD) Inch 36 x 14 x 10 36 x 14 x 10

Net Weight / Gross Weight Inch 29 / 38 29 / 38

Type Cross Flow Fan Cross Flow Fan

Diameter−Length Inch f3.6x25.4 f3.6x25.4

Pipe Diameter Inch f0.3 f0.3

Row−Fin Gap Inch 2−0.06 2−0.06

Coil length (I) x height (H) x coil width (L)

Model MP24AA MP24AA

Output W 2.4 2.4

H r/min 1050 1050 1200

M r/min 920 920 1100

L r/min 730 730 950

Aluminum Fin Copper Tube Aluminum Fin Copper Tube

Inch 25.4 x 10.5 x 1 25.4 x 10.5 x 1

H dB (A) 34 34

M dB (A) 30 30

L dB (A) 26 26

H dB (A) 44 44

M dB (A) 40 40

L dB (A) 36 36

2 421 01 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model − Outdoor Unit DLF4AV09J1A DLF4HV09J1A

Manufacturer Sanyo Sanyo

Model C−6RZ110H1A C−6RZ110H1A

Type Twin Rotary Twin Rotary

Compressor

Throttling Method

Starting Method Transducer Starting Transducer Starting

Working Temperature Range °F 55 ~ 115 55 ~ 11 5 5 ~ 24

Heat Exchanger Coil

Coil Length (I) x Height (H) x Width (L) inch 31.5 x 19.5 x.05 31.5 x 19.5 x.05

Fan Motor

Air Flow Volume of Outdoor Unit Ft3/min 1118 1118

Fan

Defrosting Method / /

Climate Type T1 T1

Isolation I I

Moisture Protection IP24 IP24

Permissible Excessive Operating Pressure for the Discharge Side

Permissible Excessive Operating Pressure for the Suction Side

Sound Pressure Level DB (A) ≤50 ≤50

Sound Power Level DB (A) ≤63 ≤63

Dimensions (WxHxD) inch 33 X 21 X 12.6 33 X 21 X 12.6

Dimensions of Package (WxHxD) inch 34.5 X 22.8 X 14.2 34.5 X 22.8 X 14.2

Net Weight / Gross Weight Lbs. 96 / 110 96 / 110

Refrigerant

Connection Pipe

Max. Interunit height Difference Ft. 33 33

Max. Interunit Piping Length Ft. 66 66

* The above data is subject to change without notice. Please refer to the nameplate of the unit.

L.R.A. A 33 33

R.L.A. A 4.59 / 2.81 4.59 / 2.81

Power Input W 775 / 735 775 / 735

Overload Protectorr Int11I−3979 Int11I−3979

Electronic Expansion Valve

Throttling

Coil

Pipe Diameter inch f0.3 f0.3

Rows−Fin Gap inch 2−0.06 2−0.06

Speed rpm 900 / 650 900 / 650 900

Output of Fan Motor W 40 40

R.L.A. A 0.17 0.17

Capacitor mF / /

Type Axial Fan Axial Fan

Diameter inch 15.7 15.7

Mpa 3.8 3.8

Mpa 1.2 1.2

Name of Refrigerant R410A R410A

Weight Oz. 42 42

Length (m) Ft. 16 16

Gas Additional Charge

Liquid Pipe Diameter inch f1/4 f1/4

Gas Pipe Diameter inch f3/8 f3/8

Oz/ft 1.1613 1.1613

Aluminum Fin−Copper

Tube

Electronic Expansion Valve Throttling

Aluminum Fin−Copper Tube

421 08 9204 00 3

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS

Model − Indoor Unit DLF4AH12J1A DLF4HH12J1A

Function Cooling Cooling Heating

Rated Voltage 115V 115V

Frequency (Inverter different Compressor speed)

Total Capacity (Inverter different Compressor speed)

Power Input (Inverter different Compressor speed)

Rated Input

Rated Current

Air Volume

High Hz 70 70 63

Standard Hz 41 41 44

Low Hz 15 15 15

High W/Btuh 3100 / 10600 3100 / 10600 3250 / 11100

Standard W/Btuh 2650 / 9000 2650 / 9000 2820 / 9500

Low W/Btuh 1300 / 4435 1300 / 4435 930 / 3200

High W 1050 1050 1100

Standard W 634 634 700

Low W 180 180 220

High W 1050 1050 1100

Standard W 634 634 700

High A 16.8 16.8 17.0

Standard A 7.0 7.0 7.5

CFM 370 370

Dehumidifying Volume I/h 0.8 0.8

EER / C.O.P 14.2 14.2

SEER / HSPF 22 22 / 9.8

Indoor Unit DLF4AH12J1A DLF4HH12J1A

SH r/min 1260 1260 1320

Speed

Fan Motor

Output W 20 20

Capacitor mF 4.0 4.0

RLA A 0.38 0.38

Fan

Evaporator

Swing Motor

Fuse A 3.15 3.15

Sound Pressure Level

Dimension (WxHxD) Inch 33 x 11 x 7 33 x 11 x 7

Dimension of Package (WxHxD) Inch 36 x 14 x 10 36 x 14 x 10

Net Weight / Gross Weight Inch 29 / 38 29 / 38

Type Cross Flow Fan Cross Flow Fan

Diameter−Length Inch f3.6x25.4 f3.6x25.4

Pipe Diameter Inch f0.3 f0.3

Row−Fin Gap Inch 2−0.06 2−0.06

Coil length (I) x height (H) x coil width (L)

Model MP24AA MP24AA

Output W 2.4 2.4

H r/min 1050 1050 1200

M r/min 920 920 1100

L r/min 730 730 950

Aluminum Fin Copper Tube Aluminum Fin Copper Tube

Inch 25.4 x 10.5 x 1 25.4 x 10.5 x 1

H dB (A) 34 34

M dB (A) 30 30

L dB (A) 26 26

H dB (A) 44 44

M dB (A) 40 40

L dB (A) 36 36

4 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model − Outdoor Unit DLC4AV12J1A DLC4HV12J1A

Manufacturer Sanyo Sanyo

Model C−6RZ110H1A C−6RZ110H1A

Type Twin Rotary Twin Rotary

Compressor

Throttling Method

Starting Method Transducer Starting Transducer Starting

Working Temperature Range °F 55 ~ 115 55 ~ 11 5 5 ~ 75

Heat Exchanger Coil

Coil Length (I) x Height (H) x Width (L) inch 30.2 x 20 x0.9 30.2 x 20 x0.9

Fan Motor

Air Flow Volume of Outdoor Unit Ft3/min 111 8 1118

Fan

Defrosting Method / Auto Defrost

Climate Type T1 T1

Isolation I I

Moisture Protection IP24 IP24

Permissible Excessive Operating Pressure for the Discharge Side

Permissible Excessive Operating Pressure for the Suction Side

Sound Pressure Level DB (A) ≤53 ≤53

Sound Power Level DB (A) ≤65 ≤65

Dimensions (WxHxD) inch 33 X 21 X 12.6 33 X 21 X 12.6

Dimensions of Package (WxHxD) inch 34.5 X 22.8 X 14.2 34.5 X 22.8 X 14.2

Net Weight / Gross Weight Lbs. 107 / 118 107 / 118

Refrigerant

Connection Pipe

Max. Interunit height Difference Ft. 33 33

Max. Interunit Piping Length Ft. 66 66

* The above data is subject to change without notice. Please refer to the nameplate of the unit.

L.R.A. A 33 33

R.L.A. A 4.59 / 2.81 4.59 / 2.81

Power Input W 775 / 735 775 / 735

Overload Protectorr Int11I−3979 Int11I−3979

Electronic Expansion Valve

Throttling

Coil

Pipe Diameter inch f0.4 f0.4

Rows−Fin Gap inch 2−0.06 2−0.06

Speed rpm 900 / 680 900 / 680 900

Output of Fan Motor W 40 40

R.L.A. A 0.17 0.17

Capacitor mF / /

Type Axial Fan Axial Fan

Diameter inch 15.7 15.7

Mpa 3.8 3.8

Mpa 1.2 1.2

Name of Refrigerant R410A R410A

Weight Oz. 45.5 45.5

Length (m) Ft. 16 16

Gas Additional Charge

Liquid Pipe Diameter inch f1/4 f1/4

Gas Pipe Diameter inch f3/8 f3/8

Oz/ft 1.1613 1.1613

Aluminum Fin−Copper

Tube

Electronic Expansion Valve Throttling

Aluminum Fin−Copper Tube

421 08 9204 00 5

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model DLC4AV12K1A DLC4HV12K1A

Power Supply

Power Supply Mode Outdoor Outdoor

Cooling Capacity (Min − Max) Btu/h 12000 (3100−13000) 12000 (3100−13000)

Heating Capacity (Min. − Max) Btu/h N/A 13000 (2400−14000)

Cooling Power Input (Min. − Max.) W 1000 (365−1080) 1000 (365−1080)

Heating Power Input (Min. − Max.) W N/A 1000 (340−1360)

Cooling Current Input A 4.5 4.5

Heating Current Input A N/A 5.2

Rated Input W 1500 1500

Rated Current A 15 15

Air Flow Volume (S/H/M/L) CFM 335/277/253/218 335/277/253/218

Dehumidifying Volume Pint/h 2.959 2.959

EER Btu/hW 12 12

COP Btu/hW N/A 10.8

SEER 20 20

HSPF N/A 9.2

Application Area m

Model − Indoor Unit DLF4AH12K1A DLF4HH12K1A

Indoor Unit

Rated Voltage V~ 208/230 208/230

Rated Frequency Hz 60 60

Phases 1 1

Fan Type Cross−flow Cross−flow

Fan Diameter Length (DXL) inch f3.6x25.4 f3.6x25.4

Cooling Speed (S/H/M/L) r/min 1330/1100/950/750 1330/1100/950/750

Heating Speed (S/H/M/L) r/min N/A 1350/1170/1050/950

Fan Motor Power Output W 20 20

Fan Motor RLA A 0.2 0.2

Fan Motor Capacitor mF 1 1

Evaporator Form W Aluminum Fin−Copper Tube Aluminum Fin−Copper Tube

Evaporator Pipe Diameter inch f0.27 f0.27

Evaporator Row−fin Gap inch 2−0.05 2−0.05

Evaporator Coil Length (LxDxW) inch 22.8x1x10.4 22.8x1x10.4

Swing Motor Model MP24AA MP24AA

Swing Motor Power Output W 2.4 2.4

Fuse Current A 3.15 3.15

Sound Pressure Level (S/H/M/L) dB (A) 42/39/36/33 42/39/36/33

Sound Power Level (S/H/M/L) dB (A) 52/49/46/43 52/49/46/43

Dimension (WxHxD) inch 33.3X10.8X7 33.3X10.8X7

Dimension of Carton Box (WxHxD)

Dimension of Package (WxHxD) inch 36X10.1X14.6 36X10.1X14.6

Net Weight lb 22 22 Gross Weight lb 28.7 28.7

inch 36X10X14 36X10X14

16−24 16−24

6 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model − Outdoor Unit DLC4AV12K1A DLC4HV12K1A

Manufacturer Mitsubishi Mitsubishi

Model KNB092FTAMC KNB092FTAMC

Oil FV50S FV50S

Compressor

Throttling Method Electronic Expansion Valve Electronic Expansion Valve

Set Temperature Range °F 60.8 ~ 86 60.8 ~ 86

Cooling Operation Ambient Temperature Range °F 0.4 ~ 109.4 0.4 ~ 109.4

Heating Operation Ambient Temperature Range °F N/A −5 ~ 75.0

Condenser

Fan Motor

Air Flow Volume of Outdoor Unit CFM 941.6 941.6

Fan

Defrosting Method N/A Automatic Defrosting

Climate Type T1 T1

Isolation I I

Moisture Protection IP24 IP24

Permissible Excessive Operating Pressure for the Discharge Side

Permissible Excessive Operating Pressure for the Suction Side

Sound Pressure Level (H/M/L) DB (A) 52/−/− 52/−/−

Sound Power Level (H/M/L) DB (A) 62/−/− 62/−/−

Dimensions (WxHxD) inch 33.4x23.2x12.6 33.4x23.2x12.6

Dimensions of Carton Box (WxHxD) inch 34.5x14.2x24.8 34.5x14.2x24.8

Dimensions of Package (WxHxD) inch 34.7x14.3x25.4 34.7x14.3x25.4

Net Weight / Gross Weight Lbs. 88.2 / 97.02 88.2 / 97.02

Refrigerant

Connection Pipe

Max. Interunit height Difference Ft. 33 33

Max. Interunit Piping Length Ft. 66 66

* The above data is subject to change without notice. Please refer to the nameplate of the unit.

Type Rotary Rotary

L.R.A. A 13.8 13.8

R.L.A. A 3.2 3.2

Power Input W 860 860

Overload Protector INT11L−6578 INT11L−6578

Form Aluminum Fin−copper Tube Aluminum Fin−copper Tube

Pipe Diameter inch f0.37 f0.37

Rows−Fin Gap inch 2−0.05 2−0.05

Coil Length (LxDxW) inch 29.4x1.7x22 29.4x1.7x22

Speed rpm 680 / 900 680 / 900

Output of Fan Motor W 30 30

R.L.A. A 0.13 0.13

Capacitor mF N/A N/A

Type Axial Flow Axial Flow

Diameter inch 15.748 15.748

Mpa 4.3 4.3

Mpa 2.5 2.5

Name of Refrigerant R410A R410A

Weight Oz. 45.864 45.864

Length inch 25 25

Gas Additional Charge Oz/ft 0.53 0.7

Liquid Pipe Outer Diameter inch 1/4 1/4

Gas Pipe Outer Diameter inch 3/8 3/8

421 08 9204 00 7

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model DLC4AV18K1A DLC4HV18K1A

Power Supply

Power Supply Mode Outdoor Outdoor

Cooling Capacity (Min − Max) Btu/h 18000 (5970−22350) 18000 (5970−22350)

Heating Capacity (Min. − Max) Btu/h N/A 19800 (4100−22000)

Cooling Power Input (Min. − Max.) W 1500 (300−2650) 1500 (300−2650)

Heating Power Input (Min. − Max.) W N/A 1650 (335−2750)

Cooling Current Input A 6.65 6.65

Heating Current Input A N/A 7.32

Rated Input W 2650 2750

Rated Current A 11.757 12.201

Air Flow Volume (S/H/M/L) CFM 500/459/383/324 500/459/383/324

Dehumidifying Volume Pint/h 0.852 0.852

EER Btu/hW 12 12

COP Btu/hW N/A 12

SEER 18 18

HSPF N/A 10

Application Area m

Model − Indoor Unit DLF4AH18K1A DLF4HH18K1A

Indoor Unit

Rated Voltage V~ 208/230 208/230

Rated Frequency Hz 60 60

Phases 1 1

Fan Type Cross−flow Cross−flow

Fan Diameter Length (DXL) inch f3.86x28 f3.86x28

Cooling Speed (S/H/M/L) r/min 1500/1200/1050/900 1500/1200/1050/900

Heating Speed (S/H/M/L) r/min N/A 1500/1250/1150/1050

Fan Motor Power Output W 20 20

Fan Motor RLA A 0.32 0.32

Fan Motor Capacitor mF 1.5 1.5

Evaporator Form W Aluminum Fin−Copper Tube Aluminum Fin−Copper Tube

Evaporator Pipe Diameter inch f0.27 f0.27

Evaporator Row−fin Gap inch 2−0.05 2−0.05

Evaporator Coil Length (LxDxW) inch 28x1x12 28x1x12

Swing Motor Model MP28VB MP28VB

Swing Motor Power Output W 2.5 2.5

Fuse Current A 3.15 3.15

Sound Pressure Level (S/H/M/L) dB (A) 49/44/40/35 49/44/40/35

Sound Power Level (S/H/M/L) dB (A) 59/54/50/45 59/54/50/45

Dimension (WxHxD) inch 37X11.7X7.9 37X11.7X7.9

Dimension of Carton Box (WxHxD)

Dimension of Package (WxHxD) inch 39.7X11.2X15 39.7X11.2X15

Net Weight lb 28.665 28.665 Gross Weight lb 37.485 37.485

inch 39.6X11.1X14.4 39.6X11.1X14.4

27−42 27−42

8 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model − Outdoor Unit DLC4AV18K1A DLC4HV18K1A

Manufacturer Mitsubishi Mitsubishi

Model SNB130FGAMC SNB130FGAMC

Oil FV50S−PVE FV50S−PVE

Compressor

Throttling Method Electronic Expansion Valve Electronic Expansion Valve

Set Temperature Range °F 61 ~ 86 61 ~ 86

Cooling Operation Ambient Temperature Range °F 14 ~ 109.0 14 ~ 109.0

Heating Operation Ambient Temperature Range °F N/A 19.4 − 75.0

Condenser

Fan Motor

Air Flow Volume of Outdoor Unit CFM 1883.2 1883.2

Fan

Defrosting Method N/A Automatic Defrosting

Climate Type T1 T1

Isolation I I

Moisture Protection IP24 IP24

Permissible Excessive Operating Pressure for the Discharge Side

Permissible Excessive Operating Pressure for the Suction Side

Sound Pressure Level (H/M/L) DB (A) 55/−/− 55/−/−

Sound Power Level (H/M/L) DB (A) 65/−/− 65/−/−

Dimensions (WxHxD) inch 37.6x27.6x15.6 37.6x27.6x15.6

Dimensions of Carton Box (WxHxD) inch 40.4x18x29 40.4x18x29

Dimensions of Package (WxHxD) inch 40.5x18x29.5 40.5x18x29.5

Net Weight / Gross Weight Lbs. 99.225 / 110.25 99.225 / 110.25

Refrigerant

Connection Pipe

Max. Interunit height Difference Ft. 33 33

Max. Interunit Piping Length Ft. 82 82

* The above data is subject to change without notice. Please refer to the nameplate of the unit.

Type Rotary Rotary

L.R.A. A 13.8 13.8

R.L.A. A 4.1 4.1

Power Input W 1200 1200

Overload Protector INT11L−6578 INT11L−6578

Form Aluminum Fin−copper Tube Aluminum Fin−copper Tube

Pipe Diameter inch f0.37 f0.37

Rows−Fin Gap inch 2−0.05 2−0.05

Coil Length (LxDxW) inch 33x1.5x26 33x1.5x26

Speed rpm 800 800

Output of Fan Motor W 60 60

R.L.A. A 0.28 0.28

Capacitor mF N/A N/A

Type Axial Flow Axial Flow

Diameter inch 20.472 20.472

Mpa 4.3 4.3

Mpa 2.5 2.5

Name of Refrigerant R410A R410A

Weight Oz. 49.392 49.392

Length inch 25 25

Gas Additional Charge Oz/ft 0.2 0.2

Liquid Pipe Outer Diameter inch 1/4 1/4

Gas Pipe Outer Diameter inch 1/2 1/2

421 08 9204 00 9

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model DLC4AV24K1A DLC4HV24K1A

Power Supply

Power Supply Mode Outdoor Outdoor

Cooling Capacity (Min − Max) Btu/h 21400 (9600−25000) 21400 (9600−25000)

Heating Capacity (Min. − Max) Btu/h N/A 23000 (4300−26000)

Cooling Power Input (Min. − Max.) W 1780 (500−2650) 1780 (500−2650)

Heating Power Input (Min. − Max.) W N/A 2100 (400−2750)

Cooling Current Input A 7.941 7.941

Heating Current Input A N/A 9.317

Rated Input W 2650 2750

Rated Current A 11.757 12.201

Air Flow Volume (S/H/M/L) CFM 589/471/412/353 589/471/412/353

Dehumidifying Volume Pint/h 1.183 1.183

EER Btu/hW 12 12

COP Btu/hW N/A 10.95

SEER 18 18

HSPF N/A 10

Application Area m

Model − Indoor Unit DLF4AH24K1A DLF4HH24K1A

Indoor Unit

Rated Voltage V~ 208/230 208/230

Rated Frequency Hz 60 60

Phases 1 1

Fan Type Cross−flow Cross−flow

Fan Diameter Length (DXL) inch f3.86x30 f3.86x30

Cooling Speed (S/H/M/L) r/min 1500/1200/1050/900 1500/1200/1050/900

Heating Speed (S/H/M/L) r/min N/A 1450/1150/1020/950

Fan Motor Power Output W 260 260

Fan Motor RLA A 0.24 0.24

Fan Motor Capacitor mF N/A N/A

Evaporator Form W Aluminum Fin−Copper Tube Aluminum Fin−Copper Tube

Evaporator Pipe Diameter inch f0.27 f0.27

Evaporator Row−fin Gap inch 2−0.06 2−0.06

Evaporator Coil Length (LxDxW) inch 30x1x15.5 30x1x15.5

Swing Motor Model MP35XX MP35XX

Swing Motor Power Output W 3 3

Fuse Current A 3.15 3.15

Sound Pressure Level (S/H/M/L) dB (A) 53/45/41/37 53/45/41/37

Sound Power Level (S/H/M/L) dB (A) 63/55/51/47 63/55/51/47

Dimension (WxHxD) inch 39.7X12.4X8.6 39.7X12.4X8.6

Dimension of Carton Box (WxHxD)

Dimension of Package (WxHxD) inch 42.4X15.7X12.9 42.4X15.7X12.9

Net Weight lb 35.28 35.28 Gross Weight lb 46.305 46.305

inch 42.2X15.5X12.3 42.2X15.5X12.3

27−42 27−42

10 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model − Outdoor Unit DLC4AV24K1A DLC4HV24K1A

Manufacturer Mitsubishi Mitsubishi

Model SNB150FGAMC SNB150FGAMC

Oil FV50S−PVE FV50S−PVE

Compressor

Throttling Method Electronic Expansion Valve Electronic Expansion Valve

Set Temperature Range °F 61 ~ 86 61 ~ 86

Cooling Operation Ambient Temperature Range °F 5 ~ 109.0 5 ~ 109.0

Heating Operation Ambient Temperature Range °F N/A 19.4 − 75.0

Condenser

Fan Motor

Air Flow Volume of Outdoor Unit CFM 2354 2354

Fan

Defrosting Method N/A N/A

Climate Type T1 T1

Isolation I I

Moisture Protection IP24 IP24

Permissible Excessive Operating Pressure for the Discharge Side

Permissible Excessive Operating Pressure for the Suction Side

Sound Pressure Level (H/M/L) DB (A) 56/−/− 56/−/−

Sound Power Level (H/M/L) DB (A) 66/−/− 66/−/−

Dimensions (WxHxD) inch 38.6x31.1x16.8 38.6x31.1x16.8

Dimensions of Carton Box (WxHxD) inch 42.5x19x33 42.5x19x33

Dimensions of Package (WxHxD) inch 42.6x19x33.7 42.6x19x33.7

Net Weight / Gross Weight Lbs. 119 / 132 119 / 132

Refrigerant

Connection Pipe

Max. Interunit height Difference Ft. 33 33

Max. Interunit Piping Length Ft. 82 82

* The above data is subject to change without notice. Please refer to the nameplate of the unit.

Type Rotary Rotary

L.R.A. A 18.5 18.5

R.L.A. A 4.9 4.9

Power Input W 1420 1420

Overload Protector INT11L−6578 INT11L−6578

Form Aluminum Fin−copper Tube Aluminum Fin−copper Tube

Pipe Diameter inch f0.27 f0.27

Rows−Fin Gap inch 2−0.05 2−0.05

Coil Length (LxDxW) inch 38x1.5x29 38x1.5x29

Speed rpm 800 800

Output of Fan Motor W 90 90

R.L.A. A 1.1 1.1

Capacitor mF 4 4

Type Axial Flow Axial Flow

Diameter inch 21.732 21.732

Mpa 4.3 4.3

Mpa 2.5 2.5

Name of Refrigerant R410A R410A

Weight Oz. 56.448 56.448

Length inch 25 25

Gas Additional Charge Oz/ft 0.2 0.2

Liquid Pipe Outer Diameter inch 1/4 1/4

Gas Pipe Outer Diameter inch 5/8 5/8

421 08 9204 00 11

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model DLF4HH30K1A DLF4HH36K1A

Power Supply

Power Supply Mode Outdoor Outdoor

Cooling Capacity (Min − Max) Btu/h 28000 (9500−30000) 33600 (7400−36000)

Heating Capacity (Min. − Max) Btu/h 28400 (10000−33000) 34600 (1500−36000)

Cooling Power Input (Min. − Max.) W 2780 (350−3400) 3650 (450−3800)

Heating Power Input (Min. − Max.) W 2870 (450−3300) 3560 (560−3700)

Cooling Current Input A 12.1 16.6

Heating Current Input A 12.5 9.21

Rated Input W 3475 4000

Rated Current A 16.7 18.2

Air Flow Volume (S/H/M/L) CFM −/706/677/647/− −/824/706/677/−

Dehumidifying Volume Pint/h 1.42 1.166

EER Btu/hW 10.7 9.21

COP Btu/hW 9.93 9.72

SEER 16 16

HSPF 8.2 8.2

Application Area m

Model − Indoor Unit DLC4HV30K1A DLC4HH36K1A

Indoor Unit

Rated Voltage V~ 208/230 208/230

Rated Frequency Hz 60 60

Phases 1 1

Fan Type Cross−flow Cross−flow

Fan Diameter Length (DXL) inch f4.25x20.58X2 f4.25x20.58X2

Cooling Speed (SH/H/ML/SL) r/min −/1410/1280/1200/− −1550/1400/1300/−

Heating Speed (SH/H/ML/SL) r/min −/1410/1280/1200/− −1550/1400/1300/−

Fan Motor Power Output W 40 60

Fan Motor RLA A 0.4 0.47

Fan Motor Capacitor mF 3.5 3.5

Input of Heater W − −

Evaporator Form W Aluminum Fin−Copper Tube Aluminum Fin−Copper Tube

Evaporator Pipe Diameter inch f11/40 f11/40

Evaporator Row−fin Gap inch 2−0.055 2−0.055

Evaporator Coil Length (LxDxW) inch 142.3x1x15 142.3x1x15

Swing Motor Model MP24BA MP24BA

Swing Motor Power Output W 2 2

Fuse Current A 3.15 3.15

Sound Pressure Level (SH/H/M/L/SL)

Sound Power Level (SH/H/M/L/SL)

Dimension (WxHxD) inch 53.1X12.8X10.0 53.1X12.8X10.0

Dimension of Carton Box (WxHxD)

Dimension of Package (WxHxD) inch 56.7X16.6X14.0 56.7X16.6X14.0

Net Weight lb 44.1 44.1 Gross Weight lb 59.5 59.5

dB (A) −/57/54/46/− −57/56/53/−

dB (A) −/57/54/46/− −/69/66/63/−

inch 56.6X16.5X13.5 56.7X16.6X14.0

377−550 495−753

12 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model − Outdoor Unit DLC4HV30K1A DLC4HV36K1A

Manufacturer Zhuhai Landa Mitsubishi

Model QXAS−D23ZX090 TNB306FPGMCMC

Oil PVE (FV50S) FV50S

Compressor

Throttling Method Electronic Expansion Valve Electronic Expansion Valve

Set Temperature Range °F 61 ~ 86 61 ~ 86

Cooling Operation Ambient Temperature Range °F 5 ~ 109.0 5 ~ 109.0

Heating Operation Ambient Temperature Range °F 19.4−75.0 19.4 − 75.0

Condenser

Fan Motor

Air Flow Volume of Outdoor Unit CFM 2354 2589

Fan

Defrosting Method Automatic Defrosting Automatic Defrosting

Climate Type T1 T1

Isolation I I

Moisture Protection IP24 IP24

Permissible Excessive Operating Pressure for the Discharge Side

Permissible Excessive Operating Pressure for the Suction Side

Sound Pressure Level (H/M/L) DB (A) 62/−/− 65/−/−

Sound Power Level (H/M/L) DB (A) 72/−/− 75/−/−

Dimensions (WxHxD) inch 38.6x31.1x16.8 38.6x31.1x16.8

Dimensions of Carton Box (WxHxD) inch 42.5x19.1x33 42.5x19.1x33

Dimensions of Package (WxHxD) inch 42.6x19x33.7 42.6x19x33.7

Net Weight / Gross Weight Lbs. 154 / 163 161 / 170

Refrigerant

Connection Pipe

Max. Interunit height Difference Ft. 32.8 32.8

Max. Interunit Piping Length Ft. 98.4 98.4

* The above data is subject to change without notice. Please refer to the nameplate of the unit.

Type Rotary Rotary

L.R.A. A 40 67

R.L.A. A 12 13.5

Power Input W 2450 3010

Overload Protector INT11L−6233 CS01F272H01

Form Aluminum Fin−copper Tube Aluminum Fin−copper Tube

Pipe Diameter inch f01/3 f3/8

Rows−Fin Gap inch 2−0.055 2−0.055

Coil Length (LxDxW) inch 37.5x1.5x29.4 37x1.7x30

Speed rpm 830 900

Output of Fan Motor W 90 170

R.L.A. A 0.45 0.73

Capacitor mF N/A N/A

Type Axial Flow Axial Flow

Diameter inch f21.73 f21.73

PSI 551 551

PSI 174 174

Name of Refrigerant R410A R410A

Weight Oz. 84.7 91.7

Length inch 24.6 24.6

Gas Additional Charge Oz/ft 0.5 0.2

Liquid Pipe Outer Diameter inch f1/4 f1/4

Gas Pipe Outer Diameter inch f5/8 f5/8

421 08 9204 00 13

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model DLF4AH36K1A

Power Supply

Power Supply Mode Outdoor

Cooling Capacity (Min − Max) Btu/h 33600 (7400−36000)

Heating Capacity (Min. − Max) Btu/h N/A

Cooling Power Input (Min. − Max.) W 3650 (410−3800)

Heating Power Input (Min. − Max.) W N/A

Cooling Current Input A 15.9

Heating Current Input A N/A

Rated Input W 4200

Rated Current A 18.2

Air Flow Volume (S/H/M/L) CFM −/824/706/677/−

Dehumidifying Volume Pint/h 1.66

EER Btu/hW 9.21

COP Btu/hW N/A

SEER 16

HSPF N/A

Application Area m

Model − Indoor Unit DLF4AH36K1A

Indoor Unit

Rated Voltage V~ 208/230

Rated Frequency Hz 60

Phases 1

Fan Type Cross−flow

Fan Diameter Length (DXL) inch f4.25x20.58X2

Cooling Speed (SH/H/ML/SL) r/min −/1550/1400/12300/−

Heating Speed (SH/H/ML/SL) r/min N/A

Fan Motor Power Output W 60

Fan Motor RLA A 0.47

Fan Motor Capacitor mF 3.5

Input of Heater W N/A

Evaporator Form W Aluminum Fin−Copper Tube

Evaporator Pipe Diameter inch f11/40

Evaporator Row−fin Gap inch 2−0.055

Evaporator Coil Length (LxDxW) inch 142.3x1x15

Swing Motor Model MP24BA

Swing Motor Power Output W 2

Fuse Current A 3.15

Sound Pressure Level (SH/H/M/L/SL)

Sound Power Level (SH/H/M/L/SL)

Dimension (WxHxD) inch 53.1X12.8X10.0

Dimension of Carton Box (WxHxD)

Dimension of Package (WxHxD) inch 56.7X16.6X14.0

Net Weight lb 44.1 Gross Weight lb 59.5

dB (A) −/59/56/53/−

dB (A) −/69/66/63/−

inch 56.6X16.5X13.5

495−753

14 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

PRODUCT SPECIFICATIONS (Cont.)

Model − Outdoor Unit DLC4AV36K1A

Manufacturer Mitsubishi

Model TNB306FPGMCMC

Oil FV50S

Compressor

Throttling Method Capillary

Set Temperature Range °F 61 ~ 86

Cooling Operation Ambient Temperature Range °F 5 ~ 109.0

Heating Operation Ambient Temperature Range °F 19.4 − 75.0

Condenser

Fan Motor

Air Flow Volume of Outdoor Unit CFM 2589

Fan

Defrosting Method N/A

Climate Type T1

Isolation I

Moisture Protection IP24

Permissible Excessive Operating Pressure for the Discharge Side

Permissible Excessive Operating Pressure for the Suction Side

Sound Pressure Level (H/M/L) DB (A) 65/−/−

Sound Power Level (H/M/L) DB (A) 75/−/−

Dimensions (WxHxD) inch 38.6x31.1x16.7

Dimensions of Carton Box (WxHxD) inch 42.5x19.1x33.1

Dimensions of Package (WxHxD) inch 42.6x19.2x33.6

Net Weight / Gross Weight Lbs. 161 / 170

Refrigerant

Connection Pipe

Max. Interunit height Difference Ft. 32.8

Max. Interunit Piping Length Ft. 98.4

* The above data is subject to change without notice. Please refer to the nameplate of the unit.

Type Rotary

L.R.A. A 67

R.L.A. A 13.5

Power Input W 3010

Overload Protector CS01F272H01

Form Aluminum Fin−copper Tube

Pipe Diameter inch f3/8

Rows−Fin Gap inch 2−0.055

Coil Length (LxDxW) inch 37x1.7x30

Speed rpm 900

Output of Fan Motor W 170

R.L.A. A 0.73

Capacitor mF N/A

Type Axial Flow

Diameter inch f21.73

PSI 551

PSI 174

Name of Refrigerant R410A

Weight Oz. 91.7

Length inch 24.6

Gas Additional Charge Oz/ft 0.2

Liquid Pipe Outer Diameter inch f1/4

Gas Pipe Outer Diameter inch f5/8

421 08 9204 00 15

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

MODEL NOMENCLATURE

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

DLC = Outdoor DLF = Indoor Outdoor/Indoor

4AV = AC Outdoor 4AH = AC Indoor 4HV = HP Outdoor 4HH = HP Indoor

09 = 9k BTU 12 = 12k BTU 18 = 18k BTU 24 = 24k BTU 30 = 30k BTU 36 = 36k BTU

J = 115−1−60 K = 208/230−1−60

1A Factory Designation

D L C 4 A V 0 9 J 1 A

Type

Size

Voltage

Use of the AHRI Certified TM Mark indicates a manufacturer’s participation in the program. For verification of certification for individual products, go to www.ahridirectory.org .

SERIAL NUMBER NOMENCLATURE

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

Serial Number

Year Week Sequential Digits Unique for Each Factory

V 1 0 2 2 1 2 3 4 5

16 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

STANDARD FEATURES AND ACCESSORIES

Ease of Operation

Mounting Brackets S Low Voltage Connections 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 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 Low Ambient Heating and Cooling on most models A

Standard Warranty

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

Extended Warranty

6 −10 Year Compressor Only O 2 − 6 Year Parts Only O 2 − 6 Year Parts Only; 1 − 6 Year Labor O 2 − 6 Year Parts Only; 6 − 10 Year Compressor Only;

1 − 6 Year Labor

Legend S = Standard A = Accessory O = Optional * Sizes 09, 18, & 24K have a clock.

16’ Transparent Suction Discharge Tubing

Adhesive

Mounting Bracket

Detection Unit

Mounting Bracket

5/8” Rubber Elbow

Wire Ties (6)

Figure 1 - Accessory Condensate Pump Kit

Table 1 − Accessory Condensate Pump Kit Contents

Item Qty.

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. Ensure power is disconnected to the fan coil unit. On some systems both the fan coil and the outdoor unit may be on the same disconnect. There may be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label.

WARNING

Condensate Pump Assembly

Detection Unit

Power Cable

Low Voltage Power Cord

Transparent

Detection

Unit Vent Tubing

A12227

421 08 9204 00 17

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

DIMENSIONS − INDOOR

Unit Size

9k 33.3 (846) 10.7 (272) 7.1 (180) 29 (13) 12k 33.3 (846) 10.7 (272) 7.1 (180) 29 (13) 18k 37.0 (940) 11.7 (297) 7.9 (201) 29 (13) 24k 39.7 (1008) 12.4 (315) 8.6 (218) 35 (16) 30k 53.1 (1349) 12.8 (325) 10.0 (54) 44.1 (20.0) 36k 53.1 (1349) 12.8 (325) 10.0 (54) 44.1 (20.0)

In. (mm)

Net Operating Weight

Lbs. (Kg)

A12377

18 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

DIMENSIONS − OUTDOOR

UNIT SIZE − 09

(Net Operating Weight: 96 lbs.- 44 kg.)

21.3

(541)

(254.0)

12.6

(320.0)

in. (mm)

UNIT SIZE − 12

(Net Operating Weight: 107 lbs.- 49 kg.)

(762.0))

33.4

(848.4)

11.3 (287.0)

23.2

A12380

(589.3)

421 08 9204 00 19

21.3

(541.0)

A12381

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

13.4

(340.4)

15.6

(396.2)

in. (mm)

UNIT SIZE − 18

(889.0)

37.6

(955.0)

(Net Operating Weight: 99 lbs.- 45 kg.)

14.5 (368.3)

27.6 (701.0)

14.6

(368.3)

16.8

(426.7)

(558.8)

UNIT SIZE − 24

(914.4)

(980.4)

(Net Operating Weight: 121 lbs.- 55 kg.)

38.6

31.1

A12382

(789.9)

in. (mm)

20 421 08 9204 00

(609.6)

15.7 (398.8)

A12383

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

UNIT SIZE − 30 (Net Operating Weight: 154 lbs − 70 kg.)

36 (Net Operating Weight: 161 lbs − 73 kg.)

14.6

(370.8)

(914.4)

(789.9)

31.1

in. (mm)

(398.8)

15.7

38.6

(980.4)

(609.6)

16.7

(424.2)

A12379

421 08 9204 00 21

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

CLEARANCES

Indoor Unit

Distance to Ceiling

6” (152 mm)

Distance to Wall

6” (152 mm)

Clearance in front of unit

118” (2997 mm)

The clearance dimensions are necessary for a correct installation, and are the minimum permissible distances to adjacent structures.

Distance to Floor

66” (1676 mm)

Distance to Wall

6” (152 mm)

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

Outdoor Unit

Above Unit 20” (508 mm)

Distance to Back Wall 12” (305 mm)

Air Discharge Side 79” (2007 mm)

Figure 2 - Unit clearance

Air Inlet Side 12” (305 mm)

Distance to Wall 20” (508 mm)

Valve Cover

A07891

22 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

SYSTEM OPERATING ENVELOPES

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

Model Size 9k 12k 12k 18k 24k 30k 36k

Indoor Operating Range (A/C and HP) °F (°C) 61 - 86 (16 - 30)

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

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

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

Figure 3 4 5 6

55 - 115

(13 - 46)

55 - 115

(13 - 46)

5 - 75

(-15 - 24)

55 - 115 (13 - 46)

5 - 75

(-15 - 24)

5 - 109

(-15 - 43)

5 - 109

(-15 - 43)

5 - 75

(-15 - 24)

5 - 109

(-15 - 43)

5 - 109

(-15 - 43)

19.4 - 75 (-7 - 24)

5 - 109

(-15 - 43)

5 - 109

(-15 - 43)

19.4 - 75 (-7 - 24)

N/A 64 - 109

5 - 109

(-15 - 43)

19.4 - 75 (-7 - 24)

(18 - 43)

64 - 109 (18 - 43)

19.4 - 75 (-7 - 24)

Figure 3 - 9k / 12k 115V System Operating Envelopes

Figure 4 - 12k 230V System Operating Envelopes

421 08 9204 00 23

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

SYSTEM OPERATING ENVELOPES (CONT.)

Figure 5 - 18k, 24k, and 30k 230V System Operating Envelopes

Figure 6 - 36k 230V System Operating Envelopes

24 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

ELECTRICAL DATA

Table 2 − Accessory Condensate Pump Kit Contents

Electrical Data Table

Operating

Unit Size

9K 115 −1−60 103/127 16.03 33 0.17 0.054 30 115 V−AC 0.38 0.056 20 22 35 12K 115−1−60 103/127 17.53 33 0.17 0.058 30 115 V−AC 0.38 0.056 20 23 40 12K 208/230−1−60 187/253 6.47 13.8 0.14 0.058 30 208/230 V−AC 0.20 0.056 20 10 15 18K 208/230−1−60 187/253 9.70 13.8 0.32 0.156 60 208/230 V−AC 0.28 0.075 20 13 20 24K 208/230−1−60 187/253 11.04 18.5 1.10 0.224 90 176−375V−DC 0.24 0.068 60 16 25 30K 208/230−1−60 187/253 13.45 40 0.45 0.228 100 208/230 V−AC 0.40 0.106 40 20 30

36K−AC 208/230−1−60 187/253 16.92 67 0.73 0.268 170 208/230 V−AC 0.47 0.114 60 24 35

36K−HP 208/230−1−60 187/253 17.50 67 0.73 0.268 170 208/230 V−AC 0.47 0.114 60 24 40 LEGEND FLA − Full Load Amps LRA − Locked Rotor Amps MCA − Minimum Circuit Amps RLA − Rated Load Amps MOCP − Maximum Over Current Protection

WIRING

The main power is supplied to the outdoor unit. The field supplied connecting cable from the outdoor unit to indoor unit consists of four wires and provides the power for the indoor unit as well as the communication signal and ground between the outdoor and indoor unit. Two wires are high voltage AC power, one is low voltage DC signal and one is a ground wire. Consult local building codes, NEC (National Electrical Code) or CEC (Canadian Electrical Code) for special requirements. Voltage drop on the connecting cable should be kept to a minimum. Use cable size and max length below:

EQUIPMENT DAMAGE HAZARD

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

 Use copper conductors only with a minimum 300 volt

rating and 2/64 inch thick insulation.

System Voltage

Volts−Ph.−Freq.

18 AWG 50 ft. (16m)

16 AWG 100 ft. (33m)

CAUTION

Voltage

(Min/Max)

Compressor Outdoor Fan Indoor Fan

Output

RLA LRA FLA HP

Watts Volts FLA HP

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 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.

CAUTION

Output

Watts

MCA

Fuse/CB

Amps

(MOCP)

Max

421 08 9204 00 25

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

CONNECTION DIAGRAMS

DLC4/DLF4 9K − 12K, 115−1−60 Connection Diagram

Connecting Cable Outdoor to Indoor

Use Copper

Conductors Only

With Minimum 300

N S L L N GND

Indoor

Unit

Control to

Indoor

Unit

Power to

115 −1−60 Low V DC

Power to

Indoor

Unit

115 −1−60 115−1−60 115−1−60

Main

Power

Supply

Main

Power

Supply

Ground

Volt, 2/64” Thick

Insulation

DLC4 9K − 12K Outdoor Unit Terminal Block DLF4 9K − 12K Indoor Unit Terminal Block

DLC4/DLF4 12K, 208/230−1−60 Connection Diagram

Connecting Cable Outdoor to Indoor

N S L GND

Power

Outdoor

115 −1−60 Low V DC 115−1−60

from

Unit

Control

from

Outdoor

Unit

Power

from

Outdoor

Unit

Ground

SL2 GND

Power to

Indoor

208/230−1−60 Low V DC 208/230−1−60

Unit

Control to

Indoor

Unit

Main Power

Supply

208/230−1−60 208/230−1−60

Power to

Indoor

Unit

Main Power

Supply

Ground

GND

DLC4 9K − 12K Outdoor Unit Terminal Block

DLC4/DLF4 18K − 36K, 208/230−1−60 Connection Diagram

L2 S L1 L2 GND

Power to

Indoor

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

Unit

Control to

Indoor

Unit

Power to

Indoor

Unit

DLC4 18K − 36K Outdoor Unit Terminal Block DLF4 18K − 36K Indoor Unit Terminal Block

Main

Power

Supply

Main

Power

Supply

Ground

Use Copper

Conductors Only

With Minimum 300

Volt, 2/64” Thick

Insulation

Connecting Cable Outdoor to Indoor

Use Copper

Conductors Only

With Minimum 300

Volt, 2/64” Thick

Insulation

SL2 GNDL1

Power

from

Outdoor

Unit

208/230−1−60 Low V DC 208/230−1−60

Control

from

Outdoor

Unit

Power

from

Outdoor

Unit

DLF4 12K Indoor Unit Terminal Block

L2 S L1 GND

Power to

Indoor

Unit

208/230−1−60 Low V DC 208/230−1−60

Control to

Indoor

Unit

Power to

Indoor

Unit

Ground

26 421 08 9204 00

Figure 7 - Connection Diagrams

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

WIRING DIAGRAMS (CONT.)

Symbol Color Symbol Symbol Parts Name

OG Orange Protective Earth

WH White COMP Compressor

YE Yellow CT1,2 Overload RD Red 4V 4−Way Valve

YEGN Yellow Green XT Terminal Block

BN Brown BU Blue BK Black

Size 9k and 12k, 115V, Indoor Unit

421 08 9204 00 27

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

WIRING DIAGRAMS (CONT.)

Size 9k and 12k, 115V, AC Outdoor Unit

Size 9k and 12k, 115V, HP Outdoor Unit

28 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

WIRING DIAGRAMS (CONT.)

Size 12k and 18k, 230V, Indoor Unit

421 08 9204 00 29

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

WIRING DIAGRAMS (CONT.)

Size 24k, 230V, Indoor Unit

30 421 08 9204 00

Size 12k, 230V, Outdoor Unit

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

WIRING DIAGRAMS (CONT.)

Size 18k, 230V, AC, Outdoor Unit

421 08 9204 00 31

Size 18k, 230V, HP, Outdoor Unit

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

WIRING DIAGRAMS (CONT.)

Size 24k, 230V, AC, Outdoor Unit

32 421 08 9204 00

Size 24k, 230V, HP, Outdoor Unit

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

WIRING DIAGRAMS (CONT.)

421 08 9204 00 33

Size 30k & 36k, 230V, AC & HP, Indoor Unit

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

WIRING DIAGRAMS (CONT.)

Size30k, 230V, HP, Outdoor Unit

34 421 08 9204 00

Size 36k, 230V, AC, Outdoor Unit

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

WIRING DIAGRAMS (CONT.)

Size36k, 230V, HP, Outdoor Unit

421 08 9204 00 35

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

REFRIGERANT SYSTEM DIAGRAM

Cooling Only Models Size 9k, 12k, 115V and Size 12k 18k, 24k 230 V

Cooling and Heating Models Size 12k, 115V and Size 12k 18k, 24k 230 V

36 421 01 9204 00

Figure 8 - Refrigerant System Diagrams

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

REFRIGERANT SYSTEM DIAGRAM

Cooling Only Models Size 36k 230 V

Cooling and Heating Models Size 30k, 36k 230 V

Refrigerant pipe diameter Liquid: ¼” Gas: ⅝”

421 08 9204 00 37

Figure 9 - Refrigerant System Diagrams

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

REFRIGERANT LINES

Refrigerant Line Routing

The refrigerant lines may be routed in any of the four directions shown in Figure 4.

For maximum serviceability, it is recommended to have refrigerant line flare connections and the drain connection on the outside of the wall that the fan coil is mounted on.

Unit Size Hole Diameter, In. (mm)

9K, 12K, 18K 2.2 (56)

24K, 30K, 36K 2.8 (71)

If piping is going through the right or left side:

Use a small saw blade to carefully remove the corresponding plastic covering on side panel and drill the appropriate size hole where the pipe is going through the wall. See table above.

Hole SIZES

Remove knockout 1 to run just the wiring. Remove knockout 1

As Viewed From Front

and 2 or knockout 1, 2, and 3 if running both piping and wiring through the side of the unit. See Figure 11.

NOTE: If required, a condensate pump is available for the

1 Right Exit

2 Right Rear Exit

(a)

(b)

3 Left Exit

4 Left Rear Exit

A08281

Figure 10 - Refrigerant Line Routing

Determine pipe hole position using the mounting plate as a template. Drill pipe hole diameter per chart below. The outside pipe hole is ½ in. (13mm) min. Lower than inside pipe hole, so it slants slightly downward. See figure 5.

application.

General Guidelines

The units are shipped with full charge of R−410A refrigerant. All charges, line sizing, and capacitiies are based on runs of 25ft. (7.6m). For runs over 25ft. (7.6m) consult long line section for charge adjustments.

Refrigerant lines should not be buried in the ground. If it is necessary to bury the lines, not more than 36 inches (914mm) should be buried. Provide a minimum of 6 inch (152mm) vertical rise to service valves to prevent refrigerant migration.

Both lines must be insulated. Use a minimum of ½ inch (12.7mm) thick insulation. Closed−cell insulation is recommen-

1/2 in. (13 mm)

Min.

ded in al long−line applications. Special consideration should be given to isolating interconnect-

ing tubing from the building structure. Isolate the tubing so that vibration or noise is not transmitted into the structure.

INDOOR

OUTDOOR

A07371

Figure 11 - Drill Holes

Long Line Applications

No change in line sizing is required.

Add refrigeration per table below.

R−410A Refrigerant Charge Table

Charge Amount *

LBS (kg)

Unit Size

9K 2.64 (1.20) 2.64 (1.20) 0.16 (15) 0.22 (20) EXV EXV 12K 2.86 (1.30) 2.86 (1.30) 0.16 (15) 0.22 (20) EXV EXV 18K 3.09 (1.40) 3.09 (1.40) 0.16 (15) 0.22 (20) EXV EXV 24K 3.53 (1.60) 3.53 (1.60) 0.16 (15) 0.54 (50) EXV EXV 30K −−−− 5.29 (2.40) −−−− 0.54 (50) −−−− EXV 36K 5.30 (2.40) 5.73 (2.60) 0.54 (50) 0.54 (50) CAP EXV

* Charge is for piping that runs up to 25 ft. (7.6 m) ** For piping runs greater than 25 ft. (7.6 m), add this amount of charge per foot of extra piping, up to the allowable length, specified in the above table.

*** EXV − Electronic Expansion Device

Cool Only Heat Pump Cool Only Heat Pump Cool Only Heat PumpHeat Pump

Additional Charge Amount **

oz/ft (g/m)

Metering Device ***

REFRIGERANT LINE LENGTHS ft. (m)

Max Line

Unit Size

9K 50 (15) 33 (10) 33 (10)

12K 66 (20) 33 (10) 33 (10)

18, 24K 82 (25) 33 (10) 33 (10)

30, 36K 98 (30) 33 (10) 33 (10)

Length

Max Elevation

(ID over OD)

38 421 08 9204 00

Max Elevation

(OD over ID)

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

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

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. 13.) Connect charge hose to vacuum pump. Fully open the low side of manifold gage. (See Fig. 14) Start vacuum pump Evacuate using either deep vacuum or triple evacuation method.

After evacuation is complete, fully close the low side of manifold gage and stop operation of vacuum pump.

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 the maximum allowable length.

Disconnect charge hose from charge connection of the low side

service valve. Fully open service valves B and A. Securely tighten caps of service valves.

Outdoor Unit

Service Valve

CAUTION

Refrigerant

Low Side

High Side

Figure 12 - Service Valve

Indoor Uni

A07360

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. 15)

5000 4500 4000 3500 3000 2500 2000

MICRONS

1500 1000

500

01234567

MINUTES

LEAK IN SYSTEM

VACUUM TIGHT TOO WET

TIGHT DRY SYSTEM

Figure 14 - Deep Vacuum Graph

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. 16 and proceed as follows:

Pump system down to 28 in. of mercury and allow pump to continue operating for an additional 15 minutes.

Close service valves and shut off vacuum pump. Connect a nitrogen cylinder and regulator to system and open

until system pressure is 2 psig. 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.

Repeat this procedure as indicated in Fig. 16. System will then be free of any contaminants and water vapor.

EVACUATE

BREAK VACUUM WITH DRY NITROGEN

WAIT

A95424

Manifold Gage

500 microns

Low side valve

Charge hose

Low side valve

High side valve

Charge hose

Vacuum pump

Figure 13 - Manifold

421 08 9204 00 39

A07361

EVACUATE

BREAK VACUUM WITH DRY NITROGEN

WAIT

EVACUATE

CHECK FOR TIGHT, DRY SYSTEM

(IF IT HOLDS DEEP VACUUM)

RELEASE CHARGE INTO SYSTEM

A95425

Figure 15 - 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.

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Remote Control and Functions

Remote Control, Size 09-24

1. Remote Control Display

2. ON/OFF Button

3. MODE Button

4. Setpoint Clock, Timer Up (+) and Down (-) Buttons

5. Fan Speed

6. Horizontal Louver Swing Button

7. Clock Button

8. Timer ON Button

9. Dry Coil Button

10. Temperature Button

11. Timer OFF Button

12. Turbo Mode Button

13. Sleep Mode button

14. Light Button to Turn ON or OFF Display on Front Panel

1. Remote Control Display

2. ON/OFF Button

3. MODE Button

4. Setpoint, Timer Up (+) and Down (-) Buttons

5. Fan Speed

6. Horizontal Louver Swing Button

7. Left/Right Louver Swing Button (Not available with these models)

8. HEALTH/SAVE Button (Not available with these models)

9. Dry Coil Button

10. Temperature Button (Not available with these models)

11. Timer Button

12. Turbo Mode Button (Not available with these models)

13. Sleep Mode button

14. Light Button to Turn ON or OFF Display on Front Panel

A12434

Remote Control, Size 30-36

40 421 08 9204 00

A12390

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Remote Control Display, Size 09−24

MODE DISPLAY

AUTO

COOL

DRY

FAN

HEAT

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

TRANSMISSION INDICATOR: Illuminates when remote control

transmits signals to the indoor unit.

This symbol appears when the unit is turned on by the remote con-

trol, and disappears when the unit is turned off.

FAN SPEED DISPLAY: Indicates the set fan speed. AUTO is dis-

played when unit is running in AUTO mode.

MODE DISPLAY: Indicates the current operation mode “AUTO”,

“COOL”, “DRY”, “FAN ONLY”, or “HEAT”

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

CLOCK DISPLAY: Indicates the current time (0 to 24 hours). CLOCK INDICATOR: Displayed with time and is not displayed

when setting ON/OFF timer.

A12391

151413128

TIMER ON / TIMER OFF DISPLAY: ON is displayed if TIMER ON

is set. OFF is displayed if TIMER OFF is set. ON OFF displayed if both ON and OFF timers are set.

TURBO DISPLAY: Indicates unit is running in Turbo Mode. 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.

TEMPERATURE DISPLAY: Indicates if room temperature or set

point temperature is being displayed on the front panel.

SWING DISPLAY: Sets louver position or set louvers to continu-

ously move for better air distribution.

LIGHT DISPLAY: Indicates if LED display on the front panel is illu-

minated.

LOCK DISPLAY: Indicates if remote control is locked.

421 08 9204 00 41

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Remote Control Display, Size 30−36

MODE DISPLAY

AUTO

COOL

DRY

FAN

HEAT

SLEEP

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

TRANSMISSION INDICATOR: Illuminates when remote control

transmits signals to the indoor unit.

This symbol appears when the unit is turned on by the remote con-

trol, and disappears when the unit is turned off.

FAN SPEED DISPLAY: Indicates the set fan speed. AUTO is dis-

played when unit is running in AUTO mode.

MODE DISPLAY: Indicates the current operation mode “AUTO”,

“COOL”, “DRY”, “FAN ONLY”, or “HEAT”

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

Battery Installation

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

To install or replace batteries :

Slide the back cover off the control to open the battery

compartment. Remove old batteries if you are replacing the batteries. Insert batteries. Follow the polarity markings inside the battery

compartment. Replace battery compartment cover.

14 1312

Left/Right Louver Swing: Not available on these models. Health/Save: Not available on these models. SETTING ON / OFF TIMES: 0.5 to 24 hours. TURBO DISPLAY: Not available on these models. 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.

TEMPERATURE DISPLAY: Not available on these models. SWING DISPLAY: Sets louver position or set louvers to continu-

ously move for better air distribution.

LIGHT DISPLAY: Indicates if LED display on the front panel is illu-

minated.

LOCK DISPLAY: Indicates if remote control is locked.

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.

42 421 08 9204 00

A08299

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Function and Controls

Description of Each Control Operation Temperature Parameters

Indoor preset temperature (T Indoor ambient temperature (T

preset)

amb.)

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 T

amb  Tpreset −3.6°F , the compressor will stop, the out-

door fan will stop with a time lag of 60s, 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 tem-

perature can be set within a range from 61°F to 86°F. If the com-

pressor is shut down for some reason, the indoor fan and the swing

device will operate at original state.

PROTECTION

Antifreeze Protection

Under cooling and dehumidifying mode, 6 minutes after the compressor is started:

evap 35.6°F, the compressor will operate at reduced

If T frequency.

evap 30.2°F is detected for duration of 3 minutes, the

If T 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. If Tevap. 42.8°F and the compressor has remained at OFF for at least 3 minutes, the compressor will resume its original operation state.

Total current up and frequency down protection

total A, frequency rise will be allowed; if Itotal ≥ B, frequency

If I rise will not be allowed; if I reduced frequency; and if I

total ≥ C, the compressor will run at

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.

Dehumidifying Mode

Working Conditions and Dehumidifying Process

amb>Tpreset, the unit will enter cooling and dehumidifying

If T mode, in which case the compressor and the outdoor fan will operate and the indoor fan will run at low speed.

If Tpreset −3.6°F  Tamb  Tpreset, the compressor remains at its original operation state. If Tamb.< Tpreset −3.6°F, the compressor will stop, the outdoor fan will stop with a time lag of 60s, and the indoor fan will operate at low speed.

Protection

Protection is the same as that under the cooling mode.

Heating Mode

Working Conditions and Heating Process

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

If T 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. If Tamb. ≥ Tpreset +9°F , the compressor will stop, the outdoor 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 its

If T 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

Figure 16 - Cooling Mode

are revealed on the display.

Defrost Mode

Total Current Table

Variables

Unit Size - V

A B C D 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 30K230V 16A 17A 18A 20A 36K230V 16A 17A 18A 20A

Condition and Defrost Process When T if T

outdoor amb. ≥41°F and the compressor has run for 3 hour,

outdoor tube < 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. T

outdoor 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.

a. Toutdoor amb. >41°F, Toutdoor tube 28.4°F;

b. 28.4°F Toutdoor amb. <41°F, Toutdoor tube 21.2°F;

c. 23°F Toutdoor amb. <28.4°FC, Toutdoor tube 17.6°F;

421 08 9204 00 43

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

d. 14°F Touter amb. <23°F, Touter tube − Tcompensatorys (Toutdoor

amb. −

5.4°F)

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

−

5.4°F)

temperature is 77°F; if T stop, the outdoor fan will stop with a time lag of 1 minute, and the indoor fan will run at preset speed. If T Tpreset , the unit will remain in its original state.

amb.Tpreset −3.6°F, the compressor will

preset –(−3.6°F)< Tamb.<

Under AUTO mode, if Tamb. Tpreset +3.6°F is detected, the unit

After energization, for the first defrost, T not the first defrost, T

compensation will be determined by Toutdoor

compensation =0 °F; if it is

pipe when defrost ends.

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

a. T b. Toutdoor pipe 35.6°F; Tcompensation = 5.4°F;

will select to run under heating mode, in which case the preset temperature is 64.4°F; if Tamb.Tpreset +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.

During defrosting, 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.

Under AUTO mode, if 68°F 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.

< Tamb. < 77°F, the unit will remain in

60 seconds later the compressor and outdoor fan will operate.

(6) Common Protection Functions and Fault Display under

Protection Cold air prevention

COOL, HEAT, DRY and AUTO Modes

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

indoor amb. <75.2°F : if Ttube 107.6°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 Ttube >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 T

tube>108°F, the fan

will run at preset speed.  In the case of Ti

ndoor amb. ≥ 75°F: if Ttube 108°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.

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

Note: T 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 Itotal ≤W, frequency rise will be allowed; if Itotal ≥X frequency rise will not be allowed; if Itotal ≥Y, the compressor

will run at reduced frequency; and if I

total ≥Z, the compressor will

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

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  125.6°F, the unit will return to its original operation

a. If T state.

b. If

T tube 131°F, frequency rise is not allowed.

tube 136.4°F, the compressor will run at reduced

c. If T frequency.

d. If T

tube 143.6°F, the compressor will stop and the indoor fan

will run at preset speed.

2) Heating overload a. If T

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

state. b. If T

tube 131°F, frequency rise is not allowed.

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

d. If

T tube 143.6°F, the compressor will stop and the indoor fan

will blow residual heat and then stop.

Exhaust temperature protection of compressor

If exhaust temperature

208.4°F, frequency is not allowed to

rise.

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 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 77°F

amb ≥77°F, the

unit will be started under cooling mode.

Under AUTO mode, if T

amb.Tpreset is detected, the unit will

If exhaust temperature reduced frequency.

If exhaust temperature If exhaust temperature

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.

217.4°F, the compressor will run at

230°F, the compressor will stop.

194°F and the compressor has stayed

select to run under cooling mode, in which case the preset

44 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

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

Indoor Ambient Temperature

Indoor Tube Temperature

Outdoor Ambient Temperature

Outdoor Tube Temperature

Exhaust After the compressor has run for 3 minutes, the

Overload After the compressor has run for 3 minutes, the

Faults

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

sensor is open or short−circuited for 30 consecutive seconds

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 air conditioner 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 air conditioner 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 air conditioner 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. (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 17 - Swing Angles for Heating and Cooling

(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: Overcurrent 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

421 08 9204 00 45

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

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).

(13) Memory function when interrupting the power supply Memory content: mode, swing function, light, set temperature and blower speed. After power is interrupted, the machine will start according to the content of the memory automatically. If the last remote control command has not set a timed function, the system will remember the last remote control command and operate accordingly. If the last remote control command has set a timed function and the power supply is interrupted before the time expires, the system will remember the timed function of the last remote control command, the timed time will be recounted from power on. If the last remote control command has set a timed function, the time is up and the system is started or stopped according to the set time when the power supply is interrupted, the system will remember the operation status before the power supply was interrupted, and not carry out the timed action; The time clock will not be remembered.

Detection of Temperature Sensor Malfunction

(1) Indoor Temperature Sensor Malfunctions of the temperature sensor can be detected at any time. (2) Indoor Pipe Temperature Sensor During defrost, a temperature sensor malfunction will not be detected. Five minutes after finishing defrost, the system will again begin to detect temperature sensor malfunctions. At all other times, a temperature sensor malfunction will be detected.

1. When a short−circuit occurs to the temperature sensor for 30 seconds: The temperature sensor overheats. In this case to protect the system, the entire unit will stop. At the same time, the temperature protection and temperature sensor malfunction will be shown.

2. When an open circuit of the temperature sensor occurs for 30s: The unit will stop and the temperature sensor malfunction will be displayed

Frequency Control

When starting the compressor, or when conditions have varied due to the changes in the room, the frequency must be initialized according to the DD value of the indoor unit and the Q value of the indoor unit. Q value: Indoor unit output determined from indoor unit volume, air flow rate and other factors.

Compressor Protection Function

When turning the compressor from OFF to ON, the system will ramp the frequency up from a lower starting limit to protect the compressor.

Input Current Control

Detects an input current with the current transformer as the compressor is running, and sets the upper frequency limit from the input current. In the case of a heat pump, this control is the upper limit control function of the frequency, which takes priority over the lower limit of four way valves activation compensation.

Freeze−up Protection Control

During cooling operation, the signals being sent from the indoor unit allow operating frequency limitation and then prevent freezing of the indoor heat exchanger.

Heating Peak−cut Control: Heat−Pump Only

During heating operation, the signals being sent from the indoor unit allow operating frequency limitation and prevent abnormally high pressure.

Defrost Control: Heat Pump Only

Defrosting is carried out by the cooling cycle (reverse cycle). The defrost time must be complete or the outdoor heat exchanger temperature must be more than its preset value when finishing.

Conditions for Starting Defrost

The starting conditions must be determined by the outdoor air temperature and heat exchanger temperature. When the system is in heating operation, 6 minutes after the compressor is started, and more than 44 minutes of accumulated time has passed since the start of the operation or end of defrost.

Conditions for Canceling Defrost

The heat exchanger temperature must be between (39°F−72°F)

Fan Control Fan control is carried out according to the following priority.

1. Fan ON control for electric component cooling fan

2. Fan control when defrosting

3. Fan OFF delay when stopped

4. ON/OFF control in cooling operation

5. Speed control when frequency adjustment function is working

6. Fan control in forced operation

7. Fan control in indoor/outdoor unit silent operation

8. Fan control in powerful mode

9. Fan control in normal operation

Fan OFF Control when Stopped

* Fan OFF delay for 60 seconds must be made when the compressor is stopped.

Speed Control in indoor/outdoor unit silent operation

1. When in Cooling Operation When the outdoor air temperature is lower than 99°F, the speed tap must be set to Low.

2. When in Heating Operation When the outdoor air temperature is higher than 39°F, the speed tap must be set to Low (only for heat pump model).

Figure 18 - Compressor Frequency (When the compressor is turned off, it cannot be turned back on for 3 minutes ((ex-

cept after defrost)).

Discharge Pipe Control

The discharge pipe temperature is used as the compressor’s internal temperature. If the discharge pipe temperature rises above a certain level, the operating frequency upper limit is set to keep this temperature from going up further.

46 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Troubleshooting

Precautions for Performing Inspections and Repairs

Be cautious during installation and maintenance. Follow all rules and regulations to avoid electric shock and to prevent injury or damage.

ELECTRICAL SHOCK HAZARD

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

Trouble Shooting Procedure

No.

1 Confirmation

2 Code displays interpretation of error codes.

3 Basic System Check

WARNING

Precautions when inspecting the control section of the outdoor unit:

A large−capacity electrolytic capacitor is used in the outdoor unit controller (inverter).When the power supply is turned off,charge(charging voltage DC280V to 380V)remains and takes a long time to discharge. Do Not open the outdoor unit for 20 minutes after power has been turned OFF..

Confirmation

(1)Confirmation of Power Supply Confirm that the power breaker operates normally and provides power; (2)Confirmation Voltage Confirm that voltage is AC 220−240 ±10%. If voltage is not in this range, the unit may not operate normally.

Display and Interpretation of Error Codes

* Static maintenance is maintenance during de−energization of the air conditioner. For static maintenance, make sure that the unit is de−energized and the plug is disconnected. *dynamic maintenance is the maintenance during energization of the unit. Before dynamic maintenance, check the electricity and ensure that there is a good ground. Check if there is electricity on the case and copper pipe of the air conditioner with a voltage tester. Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power. At times such as when the circuit board is to be replaced, place the circuit board assembly in a vertical position. Diagnose troubles according to the trouble diagnosis procedure as described below.(Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.)

421 08 9204 00 47

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

TROUBLESHOOTING

The unit has onboard diagnostics. Error codes will appear on the LED display on the front panel of the indoor unit in place of the temperature display. Error codes are also displayed on the outdoor unit microprocessor board with colored LED lights. The tables explain the error codes for the specific models.

UNITS 9K & 12K, 115 Volts

Display on Indoor Unit

Malfunction

Stop for anti−freeze protection of indoor −unit

Stop for discharge temp protection E4 Flash 7 Times

Stop for low voltage protection E5 Flash 5 Times Low voltage. Ambient temp is abnormal.

Stop for communication malfunction E6 No Flash

Stop for compressor overload protection

Overload protection H4 Flash 6 Times

Stop for IPM module protection H5 Flash 4 Times

DC motor (indoor unit) does not operate

Indoor ambient temperature sensor malfunction

Indoor tube temperature sensor malfunction

Outdoor ambient temperature sensor malfunction

Outdoor tube temperature sensor malfunction

Outdoor discharge temperature sensor malfunction

Automatic defrosting H1 Flash 2 Times H1 signal normal operation, heat pump only.

Remark

Error Code Green−LED2 Red−LED3 Yellow_LED4

E2 Flash 4 Times Flash 3 Times

H3 Flash 8 Times

F3 Flash 6 Times

F4 Flash 5 Times

F5 Flash 7 Times

1. Error codes only can be seen in the type which has the temperature display PCB. Some types do not have this function and have only the LED’s on the outdoor PCB.

2. If there is normal communication between the Indoor and Outdoor unit the green LED will be on., and flashing.

State of the Lamps of Outdoor Unit PCB

Reasons Refrigerant leakage. Indoor unit air flow

blocked. Filter dirty.

Low refrigerant. Capillary blocked. Ambient temp is abnormal.

Communication line failure. Main PCB failure. Outside interference. Wiring error. Condensate pump failure.

Compressor overheat. Low refrigerant. Capillary blocked.

Ambient temp is abnormal. Heat exchanger blocked.

IPM module over temperature. Low voltage. Silica grease problem.

DC motor control terminal contact problem. Fan does not rotate smoothly due to incorrect installation. Motor or control panel is damaged.

Bad terminal connection. Temp sensor malfunction.

48 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

UNIT 12K, 230 Volts

Indoor Unit Displaying Method

Double 8 Code

Display

Error

Malfunction

Stop for anti−freeze protection of indoor −unit

Stop for discharge temp protection

Overcurrent protection E5

Stop for communication error

Stop for compressor overload protection

Overload protection H4

Stop for IPM module protection

Indoor unit fan motor does not operate

Indoor ambient temperature sensor malfunction

Indoor tube temperature sensor malfunction

Outdoor ambient temperature sensor malfunction

Outdoor tube temperature sensor malfunction

Outdoor discharge temperature sensor malfunction

Jumper connection malfunction protection

Unit match protection LP

Indoor fan speed detection circuit malfunction

PFC overcurrent malfunction HC

High power protection L9

High voltage protection PH

Low voltage protection PL

Automatic defrosting H1

Remark

Code

1. Error codes only can be seen in the type which has the temperature display PCB. Some types do not have this function and have only the LED’s on the outdoor PCB.

2. If there is normal communication between the Indoor and Outdoor unit the green LED will be on, and flashing.

Running

Indicator Display

(LED Flash 0.5s−ON/0.5s−OFF

LED

flash 2

times

flash 4

times

flash 5

times

flash 6

times

flash 11

times

flash 15

times

Cooling

LED

flash 1

times

flash 2

times

flash 3

times

flash 4

times

flash 5

times

flash 11

times

Heating

LED

flash 3

times

flash 4

times

flash 5

times

flash 6

times

flash 21

times

flash 1

times

State of lamps of outdoor unit

Green

LED2

No Flash

PCB

Red

LED3

Flash 4

Times

Flash 6

Times

Flash 5

Times

Flash 7

Times

Yellow

LED4

Flash

3 Times

Flash

7 Times

Flash

5 Times

Flash

8 Times

Flash

6 Times

Flash

4 Times

Flash

16 Times

Flash

14 Times

Flash

9 Times

Flash

13 Times

Flash

12 Times

Flash

2 Times

Reasons

Refrigerant leakage. Indoor unit air flow blocked. Filter dirty.

Low refrigerant. Capillary blocked. Ambient temp is abnormal.

Low voltage, ambient temp is abnormal.

Communication line failure. Main PCB failure. Outside interference. Wiring error. Condensate pump failure.

Compressor overheat. Low refrigerant. Capillary blocked.

Ambient temp is abnormal. Heat exchanger blocked.

IPM module over temperature. Low voltage. Silica grease problem

Motor control terminal contact problem. Fan does not rotate smoothly due to incorrect installation. Motor or control panel is damaged.

Bad terminal connection. Temp sensor malfunction.

No jumper on controller or installed improperly or damaged. Corresponding circuit on mainboard has malfunction.

Indoor and outdoor units not matched.

Abnormal speed detection circuit on mainboard.

Overcurrent on PFC.

System power is too high.

DC side voltage is too high.

DC side voltage is too low.

H1 signal normal operation, heat pump only.

421 08 9204 00 49

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

UNIT 18K & 24K, 230 Volts

Error Code

Malfunction

System High Pressure protection

Anti−freezing protection E2

Compressor discharge high temp protection

AC overload protection E5

Indoor/Outdoor communication malfunction

Anti−High temp protection

Indoor unit fan motor no feedback

Jumper connection malfunction protection

Indoor ambient temperature sensor malfunction

Indoor evaporator sensor open circuit/short circuit

Outdoor ambient sensor open circuit/short circuit

Outdoor condenser sensor open circuit/short circuit

Compressor discharge temp sensor open circuit/short circuit

Display

Indoor Unit Display

Indicator Display

(LED Flash 0.5s−ON/0.5s−OFF

Running

LED

flash 1

times

flash 2

times

flash 4

times

flash 5

times

flash 6

times

flash 8

times

flash 11

times

flash 15

times

Cooling

LED

flash 1

times

flash 2

times

flash 3

times

flash 4

times

flash 5

times

Heating_

LED

Outdoor unit display

(LED’s have 3 modes)

OFF, ON, Flash

D40

D41

D42/

/D5

/D6

  



   

  

 

D16



D43/

D30

  

   

 



 

Operation Status Malfunction

Cooling or Dehumidifying, compressor and outdoor fan motor stop, indoor fan motor runs. Heating: all stop.

Cooling or Dehumidifying, compressor and outdoor



fan motor stop, indoor fan motor runs. Heating: all stop.

Cooling or Dehumidifying, compressor and outdoor fan motor stop, indoor fan



motor runs. Heating: all stop.

Cooling, compressor stop, and indoor fan



motor runs, Heating:all stop.

Cooling, compressor stop, and indoor fan motor runs, Heating:all stop.

System will stop

Cooling, Dehumidifying; indoor fan motor runs, all else stop. Heating all stops

Cooling, Dehumidifying; compressor will stop, and



indoor fan motor runs. Heating all stop.

Cooling, Dehumidifying; compressor will stop, and



indoor fan motor runs. Heating all stop.

Cooling, Dehumidifying will run for 3 mins, then compressor will stop, and indoor fan motor will start, Heating will run 3 mins then stop.

1. System high press, excess refrigerant.

2. Dirty outdoor heat exchanger.

3. Outdoor ambient temp is too high.

1. Indoor unit return blocked.

2. Low indoor fan motor speed.

3. Evaporator is dirty.

Refer to compressor discharge protection temp.

1. Power supply is unstable, too much variation.

2. Power supply voltage is low.

Communication line failure. Main PCB failure. Outside interference, Wiring error. Condensate pump failure.

Refer to troubleshooting section of manual.

1. Indoor control board AP1 malfunction.

2. Indoor motor M1 malfunction.

Indoor control board AP1 jumper not inserted or broken

1. Room temp sensor is not connected to the control board AP1.

2. Room temp sensor is damaged.

1. Tube temp sensor is not connected to the control board AP1.

2. Tube temp sensor is damaged.

Outdoor temp sensor not connected or damaged, check sensor resistance value

Outdoor temp sensor not connected or damaged, check sensor resistance value.

1. Discharge temp sensor not connected or damaged, check sensor resistance values.

2. Sensor head not located correctly.

50 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

UNIT 18K & 24K, 230 Volts (Cont.)

Error Code

Malfunction

Overload limit, compressor speed reduction

Over current compressor speed reduction

Compressor discharge temp high, compressor speed reduction

DC voltage is too high PH

System current too high U9

Compressor current too high

Defrost H1

Compressor overload protection

System overload protection

IPM protection H5

Display

Indoor Unit Display

Indicator Display

(LED Flash 0.5s−ON/0.5s−OFF

Running

LED

Cooling

LED

flash 6

times

flash 8

times

flash 9

times

flash 11

times

flash 13

times

flash 15

times

Heating_

LED

flash 1

times

flash 3

times

flash 4

times

flash 5

times

Outdoor unit display

(LED’s have 3 modes)

OFF, ON, Flash

D40

D41

D42/

/D5

 

/D6

D16

 

D43/

D30

   

   

  



 



 

 



   

Operation Status Malfunction

Operation normal, compressor speed reduced.

Cooling; compressor stops, and outdoor fan



runs. Heating all stop

Cooling, Dehumidifying; compressor stops, and



indoor fan motor runs. Heating all stop.

Cooling, Dehumidifying; compressor stops, and indoor fan motor runs. Heating all stop.

Heating mode, compressor runs, indoor/outdoor fan motor stop

Cooling, Dehumidifying; compressor stops, and



indoor fan motor runs. Heating all stop.

Cooling, Dehumidifying; compressor stops, and indoor fan motor runs. Heating all stop.

Refer to troubleshooting section of manual.

1. System voltage is too low.

2. System voltage is high.

1. Load is too great, ambient temp is too high

2. Refrigerant is low

3. Electric expansion valve malfunction

1. Check voltage at terminal L and N. If higher than 265VAC, cut off power supply and restart system.

2. If input voltage is normal, check the voltage at capacitor on AP1. Replace AP1 if the capacitor voltage range is 200−280v.

AP1 malfunction, replace the AP1 in outdoor unit.

Refer to service manual (IPM protection, compressor speed reduction, compressor overcurrent protection)

Normal Operation

1. Compressor terminal loose, the resistance should be lower than 1 ohm.

2. Refer to service manual. (discharge/overload protection)

Refer to troubleshooting section of manual.

421 08 9204 00 51

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

UNIT 18K & 24K, 230 Volts (Cont.)

Error Code

Malfunction

PFC protection HC

Compressor speed reduction

Heating, high temp H0

Start−up failure LC

Compressor current circuit malfunction

EEPROM malfunction EE

Capacitor charge malfunction

Module Sensor circuit malfunction

Module over temp protection

Low DC bus voltage U3

Low DC bus voltage protection

IPM temp high limit/decrease compressor run speed

Four−way valve malfunction

Display

Indoor Unit Display

Indicator Display

(LED Flash 0.5s−ON/0.5s−OFF

Running

LED

Cooling

LED

Heating_

LED

flash 6

times

flash 7

times

flash 10

times

flash 11

times

flash 13

times

flash 15

times

flash 17

times

flash 18

times

flash 19

times

flash 20

times

flash 21

times

Outdoor unit display

(LED’s have 3 modes)

OFF, ON, Flash

D40

D41

D42/

/D5

 



 



/D6



D16

 



 



 

D43/

D30

   

   

  

 



   

   

  

 



Operation Status Malfunction

Cooling, Dehumidifying; compressor stops and indoor fan motor runs. Heating all stop.

Cooling, Dehumidifying; compressor stops and



indoor fan motor runs. Heating all stop.

Cooling, Dehumidifying; compressor stops and indoor fan motor runs. Heating all stop.

Cooling, Dehumidifying; compressor stops and



indoor fan motor runs. Heating all stop.

Cooling, Dehumidifying; compressor stops and indoor fan motor runs. Heating all stop.

Cooling, Dehumidifying; compressor stops and



indoor fan motor runs. Heating all stop.

Cooling, Dehumidifying; compressor stops and



indoor fan motor runs. Heating all stop.

Cooling, Dehumidifying; compressor stops and indoor fan motor runs. Heating all stop.

Operation normal, compressor speed



reduced

In heating mode, all stop



Refer to troubleshooting section of manual.

Replace outdoor board AP1.

Refer to capacitor charging in this service manual.

Replace the outdoor boar AP1.

Check the IPM heat sink or replace outdoor board AP1.

Supply voltage is not stable.

1. Check supply voltage, if voltage lower than 150VAC, restart the unit when the power supply is normal.

2. Check reactor L connection.

Check the IPM heat sink or replace outdoor board AP1.

1. Supply voltage is lower than 175VAC.

2. 4−way valve. terminal loose/broken

3. 4−way valve damaged.

52 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

UNIT 18K & 24K, 230 Volts (Cont.)

Error Code

Malfunction

Outdoor unit error U9

Indoor freeze protection FH

Fan module protection L3

Remark

Display

1. Error codes only can be seen in the type which has the temperature display PCB. Some types do not have this function and have only the LED’s on the outdoor PCB.

2. If there is normal communication between the Indoor and Outdoor unit the green LED will be on and flashing.

Indoor Unit Display

Indicator Display

(LED Flash 0.5s−ON/0.5s−OFF

Running

LED

Cooling

LED

Heating_

LED

Outdoor unit display

(LED’s have 3 modes)

OFF, ON, Flash

D40

D41

D42/

/D5

 

/D6

D16



D43/

D30

   

   

Operation Status Malfunction

Cooling: compressor will stop, and indoor fan runs.



Heating all stop

Operation normal, compressor speed reduced

Cooling: outdoor fan motor and compressor stop; and indoor fan runs. Heating all stop

Replace outdoor board AP1.

Indoor unit return air blocked or fan speed is too low,

1. Outdoor fan terminals loose, correct problem.

2. Motor damaged, replace motor.

3. Fan motor module on mainboard is damaged; replace mainboard AP1.

421 08 9204 00 53

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

UNITS 30K & 36K, 230 Volts

Display

Indoor

Unit

Error

Malfunction

Compressor running (normal) Flash 1 times Normal Auto defrost (normal) H1 Flash 2 times Normal

Anti−freezing protection E2 Flash 3 times

Stop for IPM module protection (over current)

Stop for over current protection E5 Flash 5 times Outdoor unit over current. Ambient temp is abnormal Overload protection H4 Flash 6 times Ambient temp is abnormal. Heat exchanger blocked

Stop for discharge temp E4 Flash 7 times

Stop of compressor overload protection

Stop for over power protection L9 Flash 9 times Ambient temp is abnormal. Stop for IPM module protection

(overheat)

Stop for EEPROM read−write malfunction

Stop for low voltage protection PL Flash 12 times DC voltage is low. Stop for high voltage protection PH Flash 13 times DC voltage is high. Stop for PFC circuit over

current protection

No feedback of indoor fan motor

Stop for ID and OD don’t match LP Flash 16 times Indoor unit and outdoor unit don’t match. Compressor frequency limited

by over current protection

Compressor frequency limited by discharge temp protection

Compressor frequency limited by overload protection

Compressor frequency limited by anti−freezing protection

Outdoor pipe temp sensor malfunction

Outdoor ambient temp sensor malfunction

Outdoor discharge temp sensor malfunction

Normal operation Flash 8 times Normal compressor operation. Compressor frequency limited

by IPM protection

Compressor frequency limited by over power protection

Indoor ambient temp sensor malfunction

Indoor tube temp sensor malfunction

Stop for communication malfunction

Communication normal Flash 1 times Communication is normal. Jumper cap malfunction

protection

No feedback of outdoor fan motor

High pressure protection E1 Flash 16 times NOTE: The lamps Flash 0.5s ON, 0.5s OFF, between two error cycles, it will be 2s off.

Code

H5 Flash 4 times

H3 Flash 8 times

H5 Flash 10 times IPM module too hot. Outdoor unit air flow blocked.

EE Flash 11 times

HC Flash 14 times The PFC circuit is over current.

H6 Indoor fan is abnormal.

F4 Flash 5 times

F3 Flash 6 times

F5 Flash 7 times

E6 Off

C5 The jumper is wrong or missing.

State of the Lamps of Outdoor Unit PCB

Yellow Red Green

Flash 1 times Outdoor unit over current. Ambient temp is abnormal.

Flash 2 times

Flash 3 times Ambient temp is abnormal. Heat exchanger blocked

Flash 4 times

Flash 11 times IPM module too hot. Outdoor unit air flow blocked.

Flash 13 times Ambient temp is abnormal.

Flash 14 times

Reasons

Refrigerant leakage. Indoor unit air flow blocked. Filter dirty.

IPM module over current. Outdoor unit air flow blocked.

Low refrigerant. Capillary blocked. Ambient temp is abnormal.

Compressor shell too hot. Low refrigerant. Capillary blocked

The EEPROM on the outdoor PCB mainboard cannot read or write.

Low refrigerant. Capillary blocked. Ambient temp is abnormal.

Refrigerant leakage. Indoor unit air flow blocked. Filter dirty.

Circuit open or circuit short for outdoor condenser pipe temp sensor

Circuit open or circuit short for outdoor environment temp sensor.

Circuit open or circuit short for outdoor gas−discharge pipe temp sensor.

Circuit open or circuit short for indoor environment temp sensor.

Circuit open or circuit short for indoor evaporator pipe temp sensor.

Communication line failure. Main PCB failure. Interfere source. Wiring error. Condensate pump failure.

54 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Troubleshooting

9.1 Malfunction Analysis

Note: When replacing the controller, make sure to insert the jumper into the new controller, otherwise the unit will display C5

Tripped breaker or blown fuse

The air conditioner does not react after it is powered (after the power is applied, the buzzer does not sound and the remote start−up has no response)

Air conditioner can not start up

The remote con− troller does not receive signals (after it is powered, the buzzer will sound, unless it has malfunction)

The breaker trips immediately when it is set to ON.

The breaker trips after a few minutes when it is set to ON

No power

Fuse of controller burnt out

The transformer connection is loose or has a bad contact or the transformer has malfunctioned

Controller is broken

Remote controller is short of power

Remote controller malfunction

Receiver loose or poor connection

Receiver is broken

Measure insulation resistance to ground to see if there is any leakage.

The circuit or a part of the air conditioner has malfunctioned. Measure the insulation resistance or eliminate the malfunction. If the breaker itself has a malfunction, then replace the breaker.

Check power supply circuit.

Change controller fuse

Fasten the wiring; measure the output voltage of the transformer, if it is incorrect, change the transformer

Change remote controller

Change batteries

First, press the manual switch button AUTO, if there is no response,check based on the above methods. If it runs normally after pressing the button,check again whether the installation position and the connection wire of the reception head is correct. If it is correct,then replace the receiver or the remote controller.

Power voltage is too low

421 08 9204 00 55

Check the voltage. If it is lower than 10% of the rated voltage, check the cause, and repair.

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Improperly set temperature

If cooling or heating load is matched to unit

Malfunction of refrigerant flow

Heat insulation for the connection

pipes of the indoor unit and the out−

Poor COOL (HEAT) operation

door unit is bad.

Adjust set temperature

Check the forecasted load of cooling (heating)

The refrigerant has leakage or is insufficient

Leakage between the high pres−

sure and the low pressure in−

side the compressor

Malfunction of four−way valve

Blocked capillary or failure of metering device

Make sure that heat insulation for the thick and thin pipes

is good. Heat insulation must also be provided for the

joint and the exposed part of the copper pipe .

Fix the leak and recharge the system.

Replace the compressor

Replace the four−way valve

Replace the capillary or metering device

Block of outdoor heat ex−

changer

Air filter were blocked

Fan speed was set too slow

Air circulation is insufficient

Fan rotation speed becomes

low

The installation position of the outdoor unit is not

appropriate.

The outdoor temperature is too high.

Too much air migration. People

come in and out too frequently. There are heating devices indoors.

Clean the dust accumulated on the surface of the heat exchanger.

Clean the filter

Set the fan speed to high or

middle speed

Capacitor

damage

Motor damage

Good ventilation must be provided for the installation of the outdoor unit.

Properly install the rainproof plate or the sunproof plate. If the maximum cool air still can not meet the requirement, it is suggested to replace the air

Replace the

capacitor

Replace the motor

conditioner.

Minimize air migration, try not to use

electrical appliance with large quantity of heat

56 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

The windings of the indoor fan motor are open or the over heat protection has kicked in.

Replace the fan motor or the defective part.

The fan does not run when it is set to supply air.

In the cooling and heating mode, the compressor runs, butthe outdoor fan does not run.

In the cooling and heating mode, outdoor fan runs, but compressor doesn’t run

The built−in heat protection of the motor kicks in frequently because the motor is abnormal.

Wrong connection

The fan capacitor has open circuit or is damaged.

The outdoor fan motor is damaged.

Wrong connection

The outdoor fan capacitor is damaged.

Run capacitor of compressor malfunction

The voltage is too low or too high.

Replace the fan motor

Make the correct connection based on the circuit drawing.

Replace the fan capacitor with the same type and same specification.

Replace the fan motor

Make the correct connection based on the circuit drawing.

Replace the fan capacitor

rosserpmocehtecalpeRrosserpmocfonoitcnuflaM

Replace the capacitor

Voltage should be + or − 10% or less if it is more,

check cause and repair. Manostat is recommended

The compressor is

too hot and leads to the activation of the protector.

Wrong wire connection

The protector itself has malfunction.

The refrigerant is not enough or is too much.

The capillary is blocked or the metering device has malfunctioned and the temperature rises.

The compressor does not run smoothly or is stuck. The air discharge valve is damaged

The protector itself has malfunction.

Connect according to the circuit diagram.

Use the multimeter to check whether the contact of the compressor is on when it is not overheated. If it is not on, then replace the protector

Adjust the volume of the refrigerant

Replace the capillary or metering device

Replace the compressor

Replace the protector

421 08 9204 00 57

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

The torque of the swing motor is not

enough

The swing fan

does not run.

In cool, heat

mode, the outdoor unit

and compres−

sor will not run.

Water leakage

Wrong connection

First, check whether the connection is

wrong. If no, replace the parts

The controller is damaged(IC2003 is

damaged, the swing relay can not

close, etc)

Controller malfunction (IC2003

broken, creepage of parallel capaci−

tor of relay loop, relay is broken etc.)

Wire loose or wrong connection

Improper setting of temperature

Change controller

Correctly wire according to the drawing

Adjust setting temp.

Drainage pipe blocked or broken Change drainage pipe

Re−wrap and make it tight.Air gap in refrigerant pipe insulation

Fan of indoor unit contacts other parts

Adjust fan location

Abnormal sound

and shake

Foreign object in indoor unit

Compressor shakes too much

Refrigerant pipes are touching

Inner mounting plates are touching

Louver of outdoor unit touches

outer case.

Abnormal sound inside compressor

Take out the foreign object

Adjust support washer of compressor,

and tighten loosen screws

Separate the touching pipeline.

1. Tighten screws.

2. Stick absorbing clay between plates.

Adjust location of louver.

Change compressor

58 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Analysis or processing of some of the malfunction display:

1 Compressor discharge protection

Possible causes: shortage of refrigerant; blockage of air filter; poor ventilation or air flow short circuit of condenser; the system has non−condensing gas (such as air, water etc.); blockage of capillary assy (including filter); malfunction of metering device; leakage inside four−way valve causes incorrect operation; malfunction of compressor; malfunction of protection relay; malfunction of discharge sensor; outdoor temperature too high.

Processing method: refer to the malfunction analysis in the above section.

2 Low voltage over−current protection

Possible cause: Sudden drop of supply voltage.

3 Communication malfunction

Processing method: Check if communicating signal cable is connected reliably.

4 Sensor open or short circuit

Processing method: check whether sensor is normal, connected with the corresponding position on the controller and if damage of lead wire is found.

5 Compressor over load protection

Possible causes: insufficient or too much refrigerant; blockage of capillary or metering device and increase of suction temp.; improper running of compressor, stuck bearing, damage of discharge valve; malfunction of protector.

Processing method: adjust refrigerant amount; replace the capillary or metering device; replace the compressor; use universal meter to check if the contactor of compressor is fine when it is not overheated, if not replace the protector.

6 System malfunction

i.e. overload protection. When tube temperature (check the temperature of outdoor heat exchanger when cooling and check the temperature of indoor heat exchanger when heating) is too high, protection will be activated.

Possible causes: Outdoor temperature is too high when cooling; insufficient outdoor air circulation; refrigerant flow malfunction. Please refer to the malfunction analysis in the previous section for handling method.

7 IPM Module protection

Precessing method: Once the module malfunction happens, if it persists for a long time and cannot be self cancelled, cut off the power and turn off the unit, and then re−energize the unit again after about 10 min. After repeating the procedure for several times, if the malfunction still exists, replace the module.

421 08 9204 00 59

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

9.3 Basic System Check

Applicable for 09 & 12K model

(1) Capacitor charge fault (Fault with outdoor unit)(AP1 below refers to the outdoor control panel)

Main Check Points:

 Use AC voltmeter to check if the voltage between ter-

minal L and N on the wiring board is within 210 AC VAC.

~240

 Is the reactor (L) correctly connected? Is the connection

loose of disconnected? Is the reactor (L) damaged?

Fault diagnosis process:

Turn on the unit

and wait 1 minute

Use DC voltmeter

to measure the

voltage on the two

ends of electrolytic

capacitor

Voltage higher than 200V?

Measure the AC voltage between terminal L and N on wiring XT (power supply)

Voltage within 210VAC−250VAC

Shut down the power and wait 20 minutes; or

use DC voltmeter to measure the voltage on

on the two ends of capacitor , until the voltage is lower than 20V

Check the

connection of the reactor

(L in the Electrical

Wiring Diagram)

Fault with the voltage

testing circuit on

control panel AP1

Shut down the power and repair the power supply to restore the range 210VAC~250VAC

Replace the control

panel AP1

power on and restart the unit

If the fault is eliminated?

If the wiring of reactor

L is normal?

Replace the control

panel AP1

End

60 421 08 9204 00

Connect the reactor according to Elec− trical Wiring Diagr− am correctly

Re−energize and turn on the unit

If the fault is eliminated?

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(2) IPM Protection, Out−of−step Fault, Compressor Phase Over current (AP1 below refers to the outdoor control panel)

Main check points:

 Is the connection between control panel AP1 and com-

pressor COMP secure? Loose? Is the connection in correct order?

 Is the voltage input of the machine within normal

range? (Use AC voltmeter to measure the voltage between terminal L and N on the wiring board XT)

 Is the compressor coil resistance normal? Is the insula-

tion of compressor coil against the copper tube in good condition?

 Is the working load of the machine too high?  Is the charge volume of refrigerant correct?

Fault diagnosis process:

421 08 9204 00 61

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Energize and

switch on

IPM protection

occurs after the machine has run for a eriod of time?

Please confirm:

1. If the indoor and outdoor heat exchangers are dirty? If they are

obstructed by other

objects which affect

the heat exchange of indoor and outdoor unit.

2. If the indoor and outdoor fans are working normally?

3. If the environment temperature is too high, resulting in that the system

pressure is too high

and exceeds the

permissible range?

4. If the charge volume of refrigerant is too much, resulting in that the system pressure is too high?

5. Other conditions

resulting in that the

system pressure

becomes too high.

Refer to the Electrical Wiring Diagram and check if the connection between AP1 and COMP is loose and if the connection order is correct.

Use AC voltmeter to measure the voltage between

Y N

terminal L and N on the wiring board XT)

Voltage between

the two ends of celectrolytic

capacitor is

higher than 250V

Stop the unit and disconnect the power supply. Then, check the connection of capacitor C2 according to Electrical Wiring Diagram.

Remove the wires on the two ends of capacitor C2. Then, use capacitance meter to measure the capacitor C2. Verify as per the Parameters Sheet.

If capacitor C2 is failed?

If there is any

abnormality

described above?

between the two ends of

capacitor C2, until the

voltage is lower than 20V

control panel AP1

If the voltage

between terminal L and N on wiring

board XT is within 210VAC~250VAC?

Restartthe unit. Before

protection occurs,

use DC voltmeter to

measure the voltage

between the two

ends of electrolytic

capacitor on control

panel AP1

The connection

of capacitor C2

is loose.

Stop the unit and disconnect the power supply. Wait 20 minutes, or use DC voltmeter to measure the voltage

Replace the capacitor C2. Then, energize and start the unit.

Replace the

Take corrective actions according to Technical

Service Manual, and

then energize and start

the unit.

Replace the

control panel AP1

Check the supply voltage and restore it to

210VAC~250VAC

If the unit can

work

normally?

Reconnect the capacitor C2 according to Electrical Wiring Diagram. Then, Restart the unit.

If the unit can

work normallv?

If the unit can

work normally?

If the unit can

work normally?

If the connection between AP1 and COMP is unsecure or the connection order is wrong?

Use ohmmeter to measure the resistance between the three terminals on compressor COMP, and compare the measurements with the

compressor resistance on

Service Manual.

Use ohmmeter to measure the resistance between the two

terminals of compressor

COMP and copper tube.

62 421 08 9204 00

Connect the control panel A

P1 and compressor COMP correctly according to the Electrical Wiring Diagram. Then, energize and start the unit.

If the

resistance is

normal?

Resistance higher

than 500M ?

Replace the

control panel

AP1

END

Replace the compressor

COMP

If the unit can

work

normally?

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(3) High temperature and overload protection diagnosis (AP1 hereinafter refers to the control board of the outdoor unit)

Detection:

 Is outdoor ambient temperature in normal range°?  Are the outdoor and indoor fans operating normally?  Is the heat dissipation environment inside and outside

the unit good?

Fault diagnosis process:

Overheat and high

temperature protection

Normal protection, please operate

Is outdoor ambient temperature higher than 127°F

20 minutes after the complete

unit is powered off.

it after the outdoor ambient temp−

erature is normalized.

Is heat dissipation of the indoor unit

and outdoor unit abnormal?

Does the outdoor fan work normally?

Replace the control panel AP1

End

Improve the heat dissipation environ− ment of the unit

1. Check if the fan terminal OFAN is connected correctly

2. Resistance between any two terminals is measure by an ohm meter and should be less than 1K Ohm.

Replace the fan

capacitor C1

Replace the outdoor fan

421 08 9204 00 63

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(4) Start−up failure (following AP1for outdoor unit control board)

Detection

 Whether the compressor wiring is connected correctly?  Is the compressor broken?  Has the compressor stopped long enough before re−

start

Fault diagnosis process:

Power on the unit

Is stop time of the compressor

longer than 3 minutes?

Does startup fail?

Are the wires for the compressor connected

correctly? Is connection sequence right?

Replace the control panel AP1

If the fault is eliminated?

Restart it up after 3 minutes

Connect the wires as

per the connection diagram

64 421 08 9204 00

Replace the compressor

End

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(5) Out of step diagnosis for the compressor (AP1 hereinafter refers to the control board of the outdoor unit)

Detection:

 Is the system pressure too high?  Is the input voltage too low?

Fault diagnosis process:

Out of step occurs once the

unit is powered on.

Is stop time of the

compressor longer than

3 minutes?

Are the wires for the compressor connected

correctly? Is connection sequence right?

Is the connection made in clockwise

Connect the

wires correctly

direction?

Replace the control

panel AP1

If the fault is eliminated?

Replace the compressor

Out of step occurs in

operation

Is the outdoor fan working

normally?

Is the outdoor unit blocked

by foreign objects?

Replace the

control panel AP1

If the fault is eliminated?

Replace the compressor

Check if the fan terminal

OFAN is connected correctly

Remove foreign objects

Replace the fan

capacitor C1

Replace the outdoor fan

End

421 08 9204 00 65

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(6) Overload and air exhaust malfunction diagnosis (following AP1 for outdoor unit control board)

Detection:

 Is the PMV connected well or not? Is the PMV dam-

aged?

 Has refrigerant leaked?

Fault diagnosis process:

20 minutes after the

complete unit is

powered off

Is the terminal FA for the

electronic expansion valve

connected correctly?

Resistances between the first four pins close to the terminal hole and the fifth pin are almost the same, less than 100 ohm.

Replace the electronic

expansion valve

If the fault is eliminated?

Replace the

control panel

AP1

Connect the

wires correctly

66 421 08 9204 00

If the fault is eliminated?

Refrigerant leakage. Refill

the refrigerant

End

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(7) Power factor correct or (PFC) fault (a fault of outdoor unit) (AP1 hereinafter refers to the control board of the outdoor unit)

Detection:

 Check if the reactor (L) of the outdoor unit and the PFC

capacitor are broken

Fault diagnosis process:

Start

Check wiring of the reactor (L) of the outdoor unit and the PFC capacitor

Whether there is any

damage or

short−circuit?

Remove the PFC capacitor

and measure resistance

between the two terminals.

Is the resistance around zero?

Disconnect the terminals for the reactor and measure the resistance between the two terminals of the

reactor by an ohm meter

Whether there is any damage

or short−circuit?

The capacitor is

short circuited and

the capacitor should be repla− ced

Replace the reactor

Replace it as per the

wiring diagram and

reconnect the wires

Restart the unit

If the fault is eliminated?

Replace the control

panel AP1

End

421 08 9204 00 67

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(8) Communication malfunction: (following AP1 for outdoor unit control board)

Detection:

 Is there any damage to the indoor unit mainboard com-

munication circuit? Is communication circuit damaged?

 Are the indoor and outdoor units connection wire, and

indoor and outdoor units inside wiring correct or not, is there any damage?

Fault diagnosis process:

Start

The AP1 voltage detection circuit is at fault

If the fault is eliminated?

Check wiring inside of the indoor and outdoor

Check the communication

circuit of the outdoor unit

units

Are wires broken?

The communication

circuit is abnormal

Did the equipment operate

normally before the failure

occured?

Replace the main board

AP1 of the outdoor unit

Check the wiring of the indoor and

outdoor units with reference to the

wiring diagram

Is the connection right?

Correctly connect the

corresponding wires for

the indoor and outdoor

units with reference to

the wiring diagram

If the fault is eliminated?

Replace the main board of the indoor unit

68 421 08 9204 00

If the fault is eliminated?

End

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Application for 18 & 24K model

Confirm the malfunction type according to the malfunction indicator of indoor/outdoor unit and malfunction sheet (usually the sheet will be stuck on the electric box cover or top cover of the unit).

As long as there is a malfunction, the indicator of the outdoor controller board will display the corresponding malfunction directly; Some malfunctions will be displayed on the indoor unit directly and some malfunctions will be seen on the remote controller by pressing light button for 4 times in 3 seconds.

In the below malfunction diagnosis process, “Y” means “Yes”, “N” means “No”;

In the below malfunction diagnosis process, controller board AP1 is for outdoor controller board;

Before proceeding to the malfunction check, discharge the electrolytic capacitor according to the method mentioned before and make sure the voltage is below 20V. Otherwise, it may cause electric shock or brake the controller board!

421 08 9204 00 69

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(1) Capacitor charging malfunction (outdoor unit malfunction)

D6 D16 D30

   

Detection:

 Detect if the voltage of L and N terminal of wiring board

is between 210AC ~ 240AC by AC volt meter;

 Is reactor (L) well connected? Is connection wire loose

or disconnected? Is reactor (L) damaged?

Malfunction diagnosis process:

Turn on the unit and wait 1 minute

Use DC voltmeter to measure the voltage on the two ends of electrolytic capacitor

Fault with the voltage

Voltage higher than 200V?

testing circuit on control panel AP1

Replace the control panel AP1

Measure the AC voltage between terminal L and N on wiring board XT(power supply)

Voltage within

210VAC~250VAC?

Shut down the power and wait 20n muties; or use DC voltmeter to measure the voltage on the two ends of capacitor (test3), until the voltage is lower than 20V

Check the connection of reactor (L in the Electrical Wiring Diagram)

If the wiring of reactor L is normal?

Shut down the power and repair the power supply to restore the range 210VAC~250VAC

Connect the reactor Laccording to Electrical Wiring Diagram correctly

power on and restart the unit

Re−energize and turn on the unit

If the fault is eliminated?

Replace the control panel AP1

End

70 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(2) IPM protection, desynchronizing malfunction, phase current of compressor is overcurrent (outdoor unit malfunction)

Outdoor unit malfunction indicator status

Malfunction D5 D6 D16 D30

IPM protection    

Desynchronizing

malfunction

Compressor

overcurrent

Detection:

   

   

 If control board AP1 and compressor COMP are well

connected? If they are loose? If the connection sequence is correct?

 Is voltage input in the normal range (Test the voltage

between L, N of wiring board XT by DC voltage meter)?

 If coil resistance of compressor is normal?  If the work load of unit is heavy? If the refrigerant char-

ging is appropriate?

Malfunction diagnosis process:

421 08 9204 00 71

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Energize and switch on

IPM protection

occurs after the machine has run for

a period of time?

Please confirm:

1. If the indoor and outdoor heat exchangers are dirty? If they are obstructed by other objects which affect the heat exchange of indoor and outdoor unit.

2. If the indoor and outdoor fans are working normally?

3. If the environment temperature is too high, resulting in that the system pressure is too high and exceeds the permissible range?

4. If the charge volume of refrigerant is too much, resulting in that the system pressure is too high?

5. Other conditions resulting in that the system pressure becomes too high.

Use AC voltmeter to measure the

voltage between terminal L and N on the wiring board XT)

If the voltage

between terminal L and N on wiring

board XT is within

210VAC~250VAC?

Check the supply voltage and restore it to 210VAC~250VAC

Restart the unit. Before

Voltage between

the two ends of celectrolytic

capacitor (test3) is higher than

250V

Stop the unit and disconnect the power supply. Then, check the connection of capacitor C2 according to Electrical Wiring Diagram.

protection occurs,use DC voltmeter to measure the voltage between the two ends of electrolytic capacitor on control panel AP1 (test3)

The connection

of capacitor C2 is loose.

Reconnect the capacitor C2

according to Electrical Wiring Diagram. Then, Restart the unit.

If the unit can

work normally?

Remove the wires on the two ends of capacitor C2. Then, use capacitance meter to measure the capacitor C2. Verify as per the Parameters Sheet.

If capacitor C2 is failed?

N N

Stop the unit and disconnect the power supply. Wait 20 minutes, or use DC voltmeter to measure the voltage between the two ends of capacitor C2, until the voltage is lower than 20V

Replace the capacitor C2. Then, energize

Y 4¿ ^ „!7 „ 0

and start the unit.

Replace the control panel AP1

If the unit can work normallv?

Refer to the Electrical Wiring Diagram and check if the connection between AP1 and COMP is loose and if the connection order is correct.

If the connection

between AP1 and COMP is unsecure

or the connectionorder is wrong?

Use ohmmeter to measure the resistance between the three terminals on compressor COMP, and compare the measurements with the compressor resistance on Service Manual.

Use ohmmeter to measure the resistance between the two terminals of compressor COMP and copper tube.

If there is any

abnormality

described above?

Connect the control panel AP1 and compressor COMP correctly according

to the Electrical Wiring Diagram. Then, energize and start the unit.

If the

resistance is

normal?

Resistance higher than 500M

Replace the control panel AP1

END

Take corrective actions

according to Technical Service Manual, and

then energize and start the unit.

Replace the control panel AP1

Replace the compressor COMP

If the unit can

work normally?

If the unit can work normally?

72 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(3) Diagnosis for high temperature, overload protection (check outdoor unit in cooling mode and check indoor unit in heating mode)

Outdoor unit malfunction indicator status

D6 D16 D30

   

Detection:

 If the outdoor ambient temperature is in normal range;  If the indoor and outdoor fan are running normally;  If the heat transfer environment inside and outside the

unit is good (including if the fan speed is too low)?

 If the tube temperature sensor of indoor and outdoor

unit is normal?

Malfunction diagnosis process:

ambient temperature is higher than 127 ºF in

cooling mode?/if the ambient temperature of indoor

and outdoor unit is too high?

High temperature, overload protection

If the outdoor

Normal protection, please use it after improving ambient temperature

of indoor and outdoor unit

De−energize the unit and wait for 20min

Replace the control board(replace the outdoor control board in cooling mode, replace the indoor control board in heating mode)

If the heat transfer of outdoor

and indoor unit is good?

If the indoor and outdoor

fan work well?

check if the tube temp sensor is normal according to the resistance sheet(check outdoor tube temp in cooling mode, check indoor tube temp sensor in heating mode)

Is the tube temp sensor normal?

Replace the tube temperature sensor

Improve the heat transfer environment of the unit

1. Check if fan terminal OFAN is connected well

2. Test if the motors of

indoor and outdoor unit are broken

Replace fan capacitor C1

Replace outdoor fan

421 08 9204 00 73

End

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(4) Diagnosis for failure start up malfunction (outdoor unit malfunction)

Outdoor unit malfunction indicator status

D5 D6 D16 D30

   

Detection:

 If the compressor wiring is correct?  If the compressor has been off long enough?  If the compressor is damaged?  If the refrigerant charging is too much?

Malfunction diagnosis process:

Energize the unit

and start it

If the stop time of compressor

is more than 3min?

If the compressor wire COMP(UVW) is

well connected and connection sequence

If the refrigerant charging is

is correct

too much?

Charge the refrigerant according to service manual

Does the unit start

up normally?

If the stop time is not enough and the

high and low pressure of system is not balance , please start it after 3min

Improve the connection situation of control board AP1 and

compressor COMP, connect it with wiring diagram

Does the unit start

up normally?

Replace control board AP1

If malfunction is

removed?

Replace the compressor

End

74 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(5) Diagnosis for compressor synchronization (outdoor unit malfunction)

Outdoor unit malfunction indicator status

D5 D6 D16 D30

   

Detection:

 If the system pressure is too high?  If the working voltage is too low?

Malfunction diagnosis process:

Synchronization after energizing the unit and starting it

If the stop time of

compressor is more than

3min

wire COMP(UVW) is well connected, the

Connect wire well

If the compressor

connection sequence forwards to

clockwise direction?

Replace

control board

AP1

Remove

malfunction?

Replace

compressor

Synchronization during operation

If the outdoor fan works

normally?

If the radiating of unit is

well?

If the input voltage of unit

is normal?

If the refrigerant is too

much?

Replace control board AP1

Check if the fan

terminal OFAN is connected well

Improve the radiating of unit (clean heat

exchanger and increase ventilation)

Start to run until the

power resume normal voltage

Charge the

refrigerant with service manual

Replace fan capacitor C1

Replace outdoor fan

Remove

malfunction?

End

Replace compressor

421 08 9204 00 75

End

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(6) Diagnosis for overload and discharge malfunction (outdoor unit malfunction)

Outdoor unit malfunction indicator status

Malfunction D5 D6 D16 D30

Overload    

Discharge    

Detection:

 If the electronic expansion valve is connected cor-

rectly? Is the expansion valve damage?

 If the refrigerant leaked?  If the overload protector is damage?  If the discharge temp sensor is damage?

Malfunction diagnosis process:

After the unit de−energized for 20min

Replace overload protector SAT

If the overload protector SAT

is well connected?

Under ambient temperature, test the

resistance of overload protector with ohmic

meter, the resistance value<10000

If the wiring terminal FA of electronic

expansion is well connected?

Check if the coil of electronic expansion is installed on the valve normally

Check if the expansion valve is blocked

Remove

malfunction?

Check refrigerant, if there is leakage, please refer to specification

Connect the wire well according to wiring diagram

sensor is normal according to the

76 421 08 9204 00

Remove

malfunction?

check if the discharge temp

resistance sheet

Replace control board

End

Replace discharge

temp sensor

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

(7) Communication malfunction

Outdoor unit malfunction indicator status

D5 D6 D16 D30

   

Detection:

 Check if the connection wire and the built−in wiring of

indoor and outdoor unit is connected and not damaged;

 If the communication circuit of indoor mainboard is

damaged? If the communication circuit of outdoor mainboard (AP1) is damaged?

Malfunction diagnosis process:

Start

Connect wire of indoor and outdoor unit according to circuit diagram

If the malfunction

is removed ?

Check if the controller connection wire inside indoor and outdoor electric box is loose

If the connection wire

is normal?

Check communication circuit of outdoor unit

Problem of

communication

circuit

Replace indoor mainboard

If the unit is operating

normally before malfunction

Replace outdoor mainboard (AP1)

If the

malfunction is

removed?

Check connection wire of indoor and outdoor unit with circuit diagram

Connection

correct?

Connect wire of indoor and outdoor unit according to circuit diagram

If the malfunction

is removed?

421 08 9204 00 77

End

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

Diagnosis process for outdoor communication circuit (refer to the key detection points of outdoor unit)

Start

Test voltage valueof Test10 position in diagram with voltage meter

Number jumping

Test voltage value of Test 13 position in diagram with voltage meter

Number jumping

Test voltage value of Test 10 position in diagram with voltage meter

Number jumping

Test voltage value of Test 12 position in diagram with volltage meter

Number jumping

Outdoor unit malfunction

End

Communication circuit of outdoor unit is normal

78 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

421 08 9204 00 79

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

80 421 08 9204 00

SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)

421 08 9204 00 81

ICP DLF4HH12J1A, DLF4AV09J1A, DLF4HV09J1A, DLF4AH12J1A, DLC4AV12J1A Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual