Panasonic CU-3KS19NBU, CS-MKS12NKU, CU-4KS24NBU User Manual

TECHNICAL & SERVICE MANUAL

OUTDOOR UNIT : CU-3KS19NBU

CU-4KS24NBU CU-4KS31NBU

DC INVERTER MULTI-SYSTEM AIR CONDITIONER

CU-3KS19NBU

CU-4KS24NBU

Capacity at 230V

19,700 BTU/h

25,400 BTU/h

30,600 BTU/h

Outdoor Model No.

CU-3KS19NBU

CU-4KS24NBU

CU-4KS31NBU

Product Code No.

1 852 361 24

1 852 361 25

1 852 361 26

< Applicable Indoor Units >

Wall mounted type CS-MKS7NKU CS-MKS9NKU CS-MKS12NKU CS-MKS18NKU CS-MKS24NKU

Semi-concealed type CS-MKS9NB4U & CZ-18BT1U CS-MKS12NB4U & CZ-18BT1U CS-KS18NB4UW & CZ-18BT1U

CU-4KS31NBU

IMPORTANT

These air conditioners employ new refrigerant R410A.

Pay special attention when servicing the unit.

REFERENCE NO.

SM700877

SAFETY PRECAUTIONS

• Before doing repair work, please read the " SAFETY PRECAUTIONS" carefully and fully understand them.

• The precautionary items here are divided into " Warning" and " Caution" items. Items in particular which may cause death or serious injury to the service personnel if the work is not performed correctly, are included in the " Warning" table. However, even precautionary items identified as " Caution" also have the potential for serious consequences if not performed correctly. Important safety precautions are described for all items in both categories. Be sure to carefully follow all of them.

• Symbol Indication

: This symbol indicates items to which we need to pay attention.

In this triangle, a definite precautionary item is described.

: This symbol indicates the item to be prohibited.

In or close to this circle, a prohibited item is described.

: This symbol indicates the items requiring special attention or instruction.

In or close to this circle, a prohibited item is described.

• After doing repair work, perform a test run to confirm that there are no abnormalities. At the same time, explain the precautions in use to the user.

Warning

Before performing an overhaul, disconnect the power plug or power cable from the unit. Performing the work with the power supplied to the unit, may cause an electric shock.

When repair work or circuit inspection that requires power supply for the air conditioner, is to be performed, do not touch the charging section. Doing so may cause an electric shock.

Prohibit

For the step-up capacitor attached to the electric section, perform the repair work after sufficiently discharging it. Insufficient capacitor discharge may cause an electric shock.

Do not perform repair work on the electric sections with wet hands. Doing so may cause an electric shock.

Do not start or stop the air conditioner by means of connecting or disconnecting the power plug. Doing so may cause an electric shock or fire.

When conducting repair work only use components included in the parts list for the corresponding unit and perform the work with the appropriate tools. Incorrect or poor repair work may cause an electric shock or fire.

Never modify the unit. Doing so may cause an electric shock or fire.

Perform all electric work according to local applicable regulations related to electrical equipment or interior wiring regulation and make sure to use the exclusive circuit. Insufficient capacity to the electric circuit or defective arrangement results may cause an electric shock or fire.

Make sure to replace any power cable or lead wire showing any signs of scratch or deterioration. Failure to do so may cause an electric shock, overheating or fire.

Make sure that there is no dust on or slack in the power plug and insert fully into the socket. Dust or incomplete connections may cause an electric shock or fire.

Do not damage or process the power cord, as it may cause an electric shock or fire.

Prohibit

For the wiring between the indoor unit and outdoor unit, securely fix the specified cable onto the terminal plate. Poorly fixed wiring may cause a heat or fire.

After connecting the wiring between the indoor unit and outdoor unit, attach the terminal cover securely. Incomplete attachment of the terminal cover may cause overheating or fire.

2

Warning

If refrigerant gas blows off during the work, do not touch the refrigerant gas as it may cause frostbite.

If refrigerant gas leaks during the work, ventilate the room. If refrigerant gas catches fire, harmful gas may be generated.

Do not mix any gas other than the specified refrigerant gas in the refrigerating cycle. If air or other contaminants mix with the gas, pressure will become extremely high in the refrigerating cycle, which may cause a unit breakdown."

When the welded section of the compressor intake or discharge pipe is to be disconnected, perform it in a well-ventilated place after sufficiently recovering the refrigerant gas. Any residue gas may jet out refrigerant or refrigerating machine oil, which may cause an injury.

When the work is to be performed in a high place (About 2 meters or more), make sure to wear a safety helmet, gloves and safety belt. Insufficient safety gear may cause a serious injury in case of a fall.

When the unit is to be relocated, confirm that the new installation location has sufficient strength for the weight of the unit. Insufficient strength of the installation location and incomplete installation work may cause an injury due to the unit falling.

When the remote controller batteries are replaced, dispose of the old batteries out of the reach of children. If a child swallows a battery, make sure that the child gets immediate medical attention.

Caution

Prohibit

Do not wash the air conditioner with water, as this may cause an electric shock or fire.

For the repair work in places with high humidity or moisture, make sure to ground the unit. Failure to do so may cause an electric shock.

Confirm that the component attachment position, wiring condition, soldering condition and connector connection are normal. If not, it may cause overheating or fire.

Confirm that the temperature around the compressor is not too high, and then perform the repair work. Failure to do so may cause a burn.

Perform welding work in a place with good ventilation. If the work is performed in a poorly ventilated area, it might cause a lack of oxygen.

If the installation plate or attachment frame has deteriorated due to corrosion, etc., replace it. Failure to do so may cause an injury due to the unit falling.

When the cleaning is to be performed, make sure to turn off the power and pull out the plug. Touching the fan that is rotating at high speed may result in an injury.

When the indoor unit is to be removed, do not place it on an incline. Doing so may cause wet furniture because water left inside may trickle down.

Do not hold the sharp end of the unit or the aluminum fins, as it may cause an injury to your hand or finger.

Prohibit

After repairs, make sure to measure the insulation resistance and confirm that the value is 1 Mohm or more. Any insulation error may cause an electric shock.

After repairs, make sure to check the drainage of the indoor unit. Inappropriate drainage may cause wet furniture and floors due to water leakage.

3

SAFETY PRECAUTIONS

1. OPERATING RANGE

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Cooling

Maximum

Minimum

95 °F DB / 71 °F WB

67 °F DB / 57 °F WB

115 °F DB

14 °F DB

7

2. SPECIFICATIONS

2-1. Unit Specifications

Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NKU × 2

Duct Less Type Rated

Type

Total Capacity

Sensible Capacity Latent Capacity

Performance

Available Voltage Range Running Amperes

EER BTU/h/W 12.0 SEER BTU/Wh 18.0 Compressor Locked Rotor Amperes

Electrical Rating

Fuse or Circuit Breaker Capacity A 15

Control Microprocessor Fan Speeds Auto (Hi, Me, Lo) Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (High) Cool

Features

Refrigerant Tubing Connections Max. allowable tubing length per unit Refrigerant inch (mm) Tube Diameter inch (mm)

Unit Dimensions

Height × Width × Depth

Package Dimensions

Height × Width × Depth

Weight

Dimensions & Weight

Shipping Volume

Remarks:

1. The values shown in performance section and electrical rating section above are based on the following unit combination.

For other combination unit, please refer to the "Unit Combination Tables" in this manual. Indoor Unit : CS-MKS9NKU 2units Outdoor Unit : CU-3KS19NBU 1unit The combination indoor unit is AHRI 210/240.

2. Rating conditions are: Cooling : Indoor air temp. 80 °F DB / 67 °F WB

Outdoor air temp. 95 °F DB / 75 °F WB

Narrow tube Wide tube

Net Shipping

BTU/h

kW

BTU/h BTU/h

V

A WPower Input %Power Factor 98

A 13.0

dB-A

ft (m)

inch

(mm)

inch

(mm) Ibs (kg) Ibs (kg)

cu.ft (m3)

3-Room Multi Outdoor Unit

3Number of Connectable Indoor Units

3Number of Operatable Indoor Units

230V Single-Phase 60HzVoltage Rating

Cooling

17,000

29-1/8 × 35-7/16 × 12-19/32

34-3/16 × 41-11/32 × 16-21/32

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

( 6,800 to 18,800 )

5.00

( 1.90 to 5.50 )

14,300

2,700

1,707 (2,900)Air Circulation (High) ft3/min (m3/h)

187 to 253

6.3

1,420

Outdoor Unit

DC Twin Rotary (Inverter)

R410A / 6.17 (2,800)

Electric Expansion Valve

50

Flare Type

82 (25) 1/4 (6.35) × 3 3/8 (9.52) × 3

Outdoor Unit

(740 × 900 × 320)

(868 × 1,050 × 423)

138.9

(63.0)

147.7

(67.0)

13.41 (0.38)

< 230V >

8

Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NKU ×

Type

Total Capacity

Sensible Capacity Latent Capacity

Performance

Available Voltage Range Running Amperes

EER BTU/h/W 12.5 Compressor Locked Rotor Amperes

Electrical Rating

Fuse or Circuit Breaker Capacity A 15

Control Microprocessor Fan Speeds Auto (Hi, Me, Lo) Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (High) Cool

Features

Refrigerant Tubing Connections Max. allowable tubing length per unit Refrigerant inch (mm) Tube Diameter inch (mm)

Unit Dimensions

Height × Width × Depth

Package Dimensions

Height × Width × Depth

Weight

Dimensions & Weight

Shipping Volume

3

Narrow tube Wide tube

Net Shipping

BTU/h

kW

BTU/h BTU/h

V

A WPower Input %Power Factor 98

A 13.0

dB-A

ft (m)

inch

(mm)

inch

(mm) Ibs (kg) Ibs (kg)

cu.ft (m3)

34-3/16 × 41-11/32 × 16-21/32

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

3-Room Multi Outdoor Unit

230V Single-Phase 60HzVoltage Rating

Cooling

18,800

29-1/8 × 35-7/16 × 12-19/32

( 9,800 to 18,800 )

5.50

( 2.90 to 5.50 )

16,000

1,707 (2,900)Air Circulation (High) ft3/min (m3/h)

187 to 253

1,500

Outdoor Unit

DC Twin Rotary (Inverter)

R410A / 6.17 (2,800)

Electric Expansion Valve

Flare Type

82 (25) 1/4 (6.35) × 3 3/8 (9.52) × 3

Outdoor Unit

(740 × 900 × 320)

(868 × 1,050 × 423)

138.9

147.7

13.41 (0.38)

< 230V >

3Number of Connectable Indoor Units

3Number of Operatable Indoor Units

2,800

6.7

50

(63.0) (67.0)

Remarks:

1. The values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual. Indoor Unit : CS-MKS9NKU 3units Outdoor Unit : CU-3KS19NBU 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80 °F DB / 67 °F WB Outdoor air temp. 95 °F DB / 75 °F WB

9

Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NKU ×

Type

Total Capacity

Sensible Capacity Latent Capacity

Performance

Available Voltage Range Running Amperes

EER BTU/h/W 12.5 Compressor Locked Rotor Amperes

Electrical Rating

Fuse or Circuit Breaker Capacity A 15

Control Microprocessor Fan Speeds Auto (Hi, Me, Lo) Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (High) Cool

Features

Refrigerant Tubing Connections Max. allowable tubing length per unit Refrigerant inch (mm) Tube Diameter inch (mm)

Unit Dimensions

Height × Width × Depth

Package Dimensions

Height × Width × Depth

Weight

Dimensions & Weight

Shipping Volume

3

Narrow tube Wide tube

Net Shipping

BTU/h

kW

BTU/h BTU/h

V

A WPower Input %Power Factor 98

A 13.0

dB-A

ft (m)

inch

(mm)

inch

(mm) Ibs (kg) Ibs (kg)

cu.ft (m

3

)

34-3/16 × 41-11/32 × 16-21/32

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

3-Room Multi Outdoor Unit

208V Single-Phase 60HzVoltage Rating

Cooling

18,800

29-1/8 × 35-7/16 × 12-19/32

( 9,800 to 18,800 )

5.50

( 2.90 to 5.50 )

16,000

1,707 (2,900)Air Circulation (High) ft3/min (m3/h)

187 to 253

1,500

Outdoor Unit

DC Twin Rotary (Inverter)

R410A / 6.17 (2,800)

Electric Expansion Valve

Flare Type

82 (25) 1/4 (6.35) × 3 3/8 (9.52) × 3

Outdoor Unit

(740 × 900 × 320)

(868 × 1,050 × 423)

138.9

147.7

13.41 (0.38)

< 208V >

3Number of Connectable Indoor Units

3Number of Operatable Indoor Units

2,800

7.4

50

(63.0) (67.0)

Remarks:

1. The values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual. Indoor Unit : CS-MKS9NKU 3units Outdoor Unit : CU-3KS19NBU 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80 °F DB / 67 °F WB Outdoor air temp. 95 °F DB / 75 °F WB

10

Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS7NKU + CS-MKS9NKU × 2

Duct Less Type Rated

Type

Total Capacity

Sensible Capacity Latent Capacity

Performance

Available Voltage Range Running Amperes

EER BTU/h/W 10.0 SEER BTU/Wh 18.0 Compressor Locked Rotor Amperes

Electrical Rating

Fuse or Circuit Breaker Capacity A 20

Control Microprocessor Fan Speeds Auto (Hi, Me, Lo) Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (High) Cool

Features

Refrigerant Tubing Connections Max. allowable tubing length per unit Refrigerant inch (mm) Tube Diameter inch (mm)

Unit Dimensions

Height × Width × Depth

Package Dimensions

Height × Width × Depth

Weight

Dimensions & Weight

Shipping Volume

Remarks:

1. The values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual. Indoor Unit : CS-MKE7NKU 1units / CS-MKE9NKU 2units Outdoor Unit : CU-4KS24NBU 1unit The combination indoor unit is AHRI 210/240.

2. Rating conditions are: Cooling : Indoor air temp. 80 °F DB / 67 °F WB Outdoor air temp. 95 °F DB / 75 °F WB

Narrow tube Wide tube

Net Shipping

BTU/h

kW

BTU/h BTU/h

V

A WPower Input %Power Factor 98

A 13.0

dB-A

ft (m)

inch

(mm)

inch

(mm) Ibs (kg) Ibs (kg)

cu.ft (m

3

)

4-Room Multi Outdoor Unit

4Number of Connectable Indoor Units

4Number of Operatable Indoor Units

230V Single-Phase 60HzVoltage Rating

Cooling

24,200

3/8 (9.52) × 3 + 1/2 (12.7) × 1

29-1/8 × 35-7/16 × 12-19/32

34-3/16 × 41-11/32 × 16-21/32

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

( 9,800 to 25,400 )

7.10

( 2.90 to 7.50 )

20,300

3,900

1,707 (2,900)Air Circulation (High) ft3/min (m3/h)

187 to 253

10.7

2,420

Outdoor Unit

DC Twin Rotary (Inverter)

R410A / 6.17 (2,800)

Electric Expansion Valve

50

Flare Type

82 (25)

1/4 (6.35) × 4

Outdoor Unit

(740 × 900 × 320)

(868 × 1,050 × 423)

138.9

(63.0)

147.7

(67.0)

13.41 (0.38)

< 230V >

11

Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS9NKU ×

Type

Total Capacity

Sensible Capacity Latent Capacity

Performance

Available Voltage Range Running Amperes

EER BTU/h/W 9.9 Compressor Locked Rotor Amperes

Electrical Rating

Fuse or Circuit Breaker Capacity A 20

Control Microprocessor Fan Speeds Auto (Hi, Me, Lo) Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (High) Cool

Features

Refrigerant Tubing Connections Max. allowable tubing length per unit Refrigerant inch (mm) Tube Diameter inch (mm)

Unit Dimensions

Height × Width × Depth

Package Dimensions

Height × Width × Depth

Weight

Dimensions & Weight

Shipping Volume

3

Narrow tube Wide tube

Net Shipping

BTU/h

kW

BTU/h BTU/h

V

A WPower Input %Power Factor 98

A 13.0

dB-A

ft (m)

inch

(mm)

inch

(mm) Ibs (kg) Ibs (kg)

cu.ft (m

3

)

34-3/16 × 41-11/32 × 16-21/32

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

4-Room Multi Outdoor Unit

230V Single-Phase 60HzVoltage Rating

Cooling

25,400

3/8 (9.52) × 3 + 1/2 (12.7) × 1

29-1/8 × 35-7/16 × 12-19/32

( 9,800 to 25,400 )

7.50

( 2.90 to 7.50 )

21,400

1,707 (2,900)Air Circulation (High) ft3/min (m3/h)

187 to 253

2,560

Outdoor Unit

DC Twin Rotary (Inverter)

R410A / 6.17 (2,800)

Electric Expansion Valve

Flare Type

82 (25)

1/4 (6.35) × 4

Outdoor Unit

(740 × 900 × 320)

(868 × 1,050 × 423)

138.9

147.7

13.41 (0.38)

< 230V >

4Number of Connectable Indoor Units

4Number of Operatable Indoor Units

4,000

11.3

50

(63.0) (67.0)

Remarks:

1. The values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual. Indoor Unit : CS-MKS9NKU 3units Outdoor Unit : CU-4KS24NBU 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80 °F DB / 67 °F WB Outdoor air temp. 95 °F DB / 75 °F WB

12

Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS9NKU ×

Type

Total Capacity

Sensible Capacity Latent Capacity

Performance

Available Voltage Range Running Amperes

EER BTU/h/W 9.9 Compressor Locked Rotor Amperes

Electrical Rating

Fuse or Circuit Breaker Capacity A 20

Control Microprocessor Fan Speeds Auto (Hi, Me, Lo) Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (High) Cool

Features

Refrigerant Tubing Connections Max. allowable tubing length per unit Refrigerant inch (mm) Tube Diameter inch (mm)

Unit Dimensions

Height × Width × Depth

Package Dimensions

Height × Width × Depth

Weight

Dimensions & Weight

Shipping Volume

3

Narrow tube Wide tube

Net Shipping

BTU/h

kW

BTU/h BTU/h

V

A WPower Input %Power Factor 98

A 13.0

dB-A

ft (m)

inch

(mm)

inch

(mm) Ibs (kg) Ibs (kg)

cu.ft (m

3

)

34-3/16 × 41-11/32 × 16-21/32

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

4-Room Multi Outdoor Unit

208V Single-Phase 60HzVoltage Rating

Cooling

24,400

3/8 (9.52) × 3 + 1/2 (12.7) × 1

29-1/8 × 35-7/16 × 12-19/32

( 9,800 to 24,400 )

7.20

( 2.90 to 7.20 )

20,600

1,707 (2,900)Air Circulation (High) ft3/min (m3/h)

187 to 253

2,460

Outdoor Unit

DC Twin Rotary (Inverter)

R410A / 6.17 (2,800)

Electric Expansion Valve

Flare Type

82 (25)

1/4 (6.35) × 4

Outdoor Unit

(740 × 900 × 320)

(868 × 1,050 × 423)

138.9

147.7

13.41 (0.38)

< 208V >

4Number of Connectable Indoor Units

4Number of Operatable Indoor Units

3,800

12.1

50

(63.0) (67.0)

Remarks:

1. The values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual. Indoor Unit : CS-MKS9NKU 3units Outdoor Unit : CU-4KS24NBU 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80 °F DB / 67 °F WB Outdoor air temp. 95 °F DB / 75 °F WB

13

Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS7NKU × 3 + CS-MKS9NKU

Duct Less Type Rated

Type

Total Capacity

Sensible Capacity Latent Capacity

Performance

Available Voltage Range Running Amperes

EER BTU/h/W 11.2 SEER BTU/Wh 17.6 Compressor Locked Rotor Amperes

Electrical Rating

Fuse or Circuit Breaker Capacity A 20

Control Microprocessor Fan Speeds Auto (Hi, Me, Lo) Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (High) Cool

Features

Refrigerant Tubing Connections Max. allowable tubing length per unit Refrigerant inch (mm) Tube Diameter inch (mm)

Unit Dimensions

Height × Width × Depth

Package Dimensions

Height × Width × Depth

Weight

Dimensions & Weight

Shipping Volume

Remarks:

1. The values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual. Indoor Unit : CS-MKE7NKU 3units / CS-MKE9NKU 1units Outdoor Unit : CU-4KS31NBU 1unit The combination indoor unit is AHRI 210/240.

2. Rating conditions are: Cooling : Indoor air temp. 80 °F DB / 67 °F WB Outdoor air temp. 95 °F DB / 75 °F WB

Narrow tube Wide tube

Net Shipping

BTU/h

kW

BTU/h BTU/h

V

A WPower Input %Power Factor 99

A 17.0

dB-A

ft (m)

inch

(mm)

inch

(mm) Ibs (kg) Ibs (kg)

cu.ft (m

3

)

4-Room Multi Outdoor Unit

4Number of Connectable Indoor Units

4Number of Operatable Indoor Units

230V Single-Phase 60HzVoltage Rating

Cooling

29,000

3/8 (9.52) × 2 + 1/2 (12.7) × 2

35-1/32 × 35-7/16 × 12-19/32

40-1/8 × 41-11/32 × 16-21/32

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

( 9,800 to 29,000 )

8.50

( 2.90 to 8.50 )

24,400

4,600

1,942 (3,300)Air Circulation (High) ft3/min (m3/h)

187 to 253

11.4

2,600

Outdoor Unit

DC Twin Rotary (Inverter)

R410A / 8.38 (3,800)

Electric Expansion Valve

53

Flare Type

100 (30.5)

1/4 (6.35) × 4

Outdoor Unit

(890 × 900 × 320)

(1,019 × 1,050 × 423)

174.2

(79.0)

183.0

(83.0)

15.88 (0.45)

< 230V >

14

Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS9NKU ×

Type

Total Capacity

Sensible Capacity Latent Capacity

Performance

Available Voltage Range Running Amperes

EER BTU/h/W 10.9 Compressor Locked Rotor Amperes

Electrical Rating

Fuse or Circuit Breaker Capacity A 20

Control Microprocessor Fan Speeds Auto (Hi, Me, Lo) Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (High) Cool

Features

Refrigerant Tubing Connections Max. allowable tubing length per unit Refrigerant inch (mm) Tube Diameter inch (mm)

Unit Dimensions

Height × Width × Depth

Package Dimensions

Height × Width × Depth

Weight

Dimensions & Weight

Shipping Volume

4

Narrow tube Wide tube

Net Shipping

BTU/h

kW

BTU/h BTU/h

V

A WPower Input %Power Factor 99

A 17.0

dB-A

ft (m)

inch

(mm)

inch

(mm) Ibs (kg) Ibs (kg)

cu.ft (m

3

)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

4-Room Multi Outdoor Unit

230V Single-Phase 60HzVoltage Rating

Cooling

30,600

3/8 (9.52) × 2 + 1/2 (12.7) × 2

35-1/32 × 35-7/16 × 12-19/32

40-1/8 × 41-11/32 × 16-21/32

( 9,800 to 30,600 )

9.00

( 2.90 to 9.00 )

25,800

1,942 (3,300)Air Circulation (High) ft3/min (m3/h)

187 to 253

2,800

Outdoor Unit

DC Twin Rotary (Inverter)

R410A / 8.38 (3,800)

Electric Expansion Valve

Flare Type

100 (30.5)

1/4 (6.35) × 4

Outdoor Unit

(890 × 900 × 320)

(1,019 × 1,050 × 423)

174.2

183.0

15.88 (0.45)

< 230V >

4Number of Connectable Indoor Units

4Number of Operatable Indoor Units

4,800

12.3

53

(79.0) (83.0)

Remarks:

1. The values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual. Indoor Unit : CS-MKS9NKU 4units Outdoor Unit : CU-4KS31NBU 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80 °F DB / 67 °F WB Outdoor air temp. 95 °F DB / 75 °F WB

15

Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS9NKU ×

Type

Total Capacity

Sensible Capacity Latent Capacity

Performance

Available Voltage Range Running Amperes

EER BTU/h/W 11.2 Compressor Locked Rotor Amperes

Electrical Rating

Fuse or Circuit Breaker Capacity A 20

Control Microprocessor Fan Speeds Auto (Hi, Me, Lo) Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (High) Cool

Features

Refrigerant Tubing Connections Max. allowable tubing length per unit Refrigerant inch (mm) Tube Diameter inch (mm)

Unit Dimensions

Height × Width × Depth

Package Dimensions

Height × Width × Depth

Weight

Dimensions & Weight

Shipping Volume

4

Narrow tube Wide tube

Net Shipping

BTU/h

kW

BTU/h BTU/h

V

A WPower Input %Power Factor 99

A 17.0

dB-A

ft (m)

inch

(mm)

inch

(mm) Ibs (kg) Ibs (kg)

cu.ft (m

3

)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

4-Room Multi Outdoor Unit

208V Single-Phase 60HzVoltage Rating

Cooling

28,600

3/8 (9.52) × 2 + 1/2 (12.7) × 2

35-1/32 × 35-7/16 × 12-19/32

40-1/8 × 41-11/32 × 16-21/32

( 9,800 to 28,600 )

8.40

( 2.90 to 8.40 )

24,200

1,942 (3,300)Air Circulation (High) ft3/min (m3/h)

187 to 253

2,560

Outdoor Unit

DC Twin Rotary (Inverter)

R410A / 8.38 (3,800)

Electric Expansion Valve

Flare Type

100 (30.5)

1/4 (6.35) × 4

Outdoor Unit

(890 × 900 × 320)

(1,019 × 1,050 × 423)

174.2

183.0

15.88 (0.45)

< 208V >

4Number of Connectable Indoor Units

4Number of Operatable Indoor Units

4,400

12.7

53

(79.0) (83.0)

Remarks:

1. The values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual. Indoor Unit : CS-MKS9NKU 4units Outdoor Unit : CU-4KS31NBU 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80 °F DB / 67 °F WB Outdoor air temp. 95 °F DB / 75 °F WB

16

2-2. Major Component Specifications

2-2-1. Outdoor Unit

Outdoor Unit CU-3KS19NBU

Control PCB

Part No.

Controls

Control Circuit Fuse

Compressor

Type Compressor Model / Nominal Output Compressor Oil ... Amount Coil Resistance (Ambient Temp. 68 °F (20 °C))

Safety Device

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Overload Relay

Operation Temp.

Run Capacitor

Crankcase Heater

Pints (cc)

Ohm

Model

Micro F

VAC

CB-CU-3KS19NBU

Microprocessor

250V 25A

DC Twin Rotary (Hermetic)

5KD240XAB21 / 1,700W

FV50S ... 1.91 (900)

U - V :

0.720 V - W : W - U :

CS-7L-2515

Open : 239 °F (115 °C), Close : 212 °F (100 °C)

230V 30W

0.708

0.726

Yes Yes Yes

-

Fan

Type Q'ty ... Dia. inch (mm)

Fan Motor

Type Model ... Q'ty No. of Poles Rough Measure RPM (Cool) Nominal Output Coil Resistance

(Ambient Temp. 68 °F (20 °C))

Safety Device

Type Over-Current Protection

Run Capacitor

Heat Exchanger Coil

Coil

Rows Fins per inch

Face Area

Over-Heat Protection

W

Ohm

Micro F

VAC

2

ft

(m2)

Propeller

1 ... D18-1/8 (D460)

DC Motor

SIC-71FW-D490-1 ... 1

8

750

90

-

Internal Controller

Yes Yes

-

Aluminum Plate Fin / Copper Tube

2

18.1

6.40 (0.595)

External Finish Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

17

Outdoor Unit CU-4KS24NBU

Control PCB

Part No.

Controls

Control Circuit Fuse

Compressor

Type Compressor Model / Nominal Output Compressor Oil ... Amount Coil Resistance (Ambient Temp. 68 °F (20 °C))

Safety Device

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Overload Relay

Run Capacitor

Crankcase Heater

Pints (cc)

Ohm

Model

Operation Temp.

Micro F

VAC

CB-CU-4KS24NBU

Microprocessor

250V 25A

DC Twin Rotary (Hermetic)

5KD240XAB21 / 1,700W

FV50S ... 1.91 (900)

U - V :

0.720 V - W : W - U :

0.708

0.726

Yes Yes Yes

CS-7L-2515

Open : 239 °F (115 °C), Close : 212 °F (100 °C)

-

230V 30W

Fan

Type Q'ty ... Dia. inch (mm)

Fan Motor

Type Model ... Q'ty No. of Poles Rough Measure RPM (Cool) Nominal Output Coil Resistance

(Ambient Temp. 68 °F (20 °C))

Safety Device

Type Over-Current Protection Over-Heat Protection

Run Capacitor

Heat Exchanger Coil

Coil

Rows Fins per inch

Face Area

W

Ohm

Micro F

VAC

2

ft

(m2)

Propeller

1 ... D18-1/8 (D460)

DC Motor

SIC-71FW-D490-1 ... 1

8

750

90

-

Internal Controller

Yes Yes

-

Aluminum Plate Fin / Copper Tube

2

18.1

6.40 (0.595)

External Finish Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

18

Outdoor Unit CU-4KS31NBU

Control PCB

Part No.

Controls

Control Circuit Fuse

Compressor

Type Compressor Model / Nominal Output Compressor Oil ... Amount Coil Resistance (Ambient Temp. 68 °F (20 °C))

Safety Device

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Overload Relay

Run Capacitor

Crankcase Heater

Pints (cc)

Ohm

Model

Operation Temp.

Micro F

VAC

CB-CU-4KS31NBU

Microprocessor

250V 25A

DC Twin Rotary (Hermetic)

5JD420XAB22 / 3,000W

FV50S ... 2.55 (1,200)

U - V :

0.435 V - W : W - U :

0.441

0.452

Yes Yes Yes

CS-7L-2515

Open : 239 °F (115 °C), Close : 212 °F (100 °C)

-

230V 30W

Fan

Type Q'ty ... Dia. inch (mm)

Fan Motor

Type Model ... Q'ty No. of Poles Rough Measure RPM (Cool) Nominal Output Coil Resistance

(Ambient Temp. 68 °F (20 °C))

Safety Device

Type Over-Current Protection Over-Heat Protection

Run Capacitor

Heat Exchanger Coil

Coil

Rows Fins per inch

Face Area

W

Ohm

Micro F

VAC

2

ft

(m2)

Propeller

1 ... D18-1/8 (D460)

DC Motor

SIC-71FW-D490-1 ... 1

8

800

90

-

Internal Controller

Yes Yes

-

Aluminum Plate Fin / Copper Tube

2

18.1

7.75 (0.72)

External Finish Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

19

2-3. Other Component Specifications

Sensor Name

Outdoor air temp sensor

Outdoor heat exchanger sensor

AW / AN sensor

BW / BN sensor

CW / CN sensor

DW / DN sensor

Model No.

of sensor

TKS295B

TKS292B

40

35

30

25

20

Resistance (k ohm)

15

10

5

Quantity of Sensor

CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU

1

1 / 1

0

1

1 / 1

1

1 / 1

0

Sensor Name

Compressor temp sensor TKS293B

Model No.

of sensor

200

180

160

140

120

100

Resistance (k ohm)

80

60

40

-

4 5 14 23 32 41 50 59 68

(-20)(-15)(-10) (-5) (0) (5) (10) (15) (20)

Temperature F ( C)

Quantity of Sensor

CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU

11

1

20

0

32 50 68 86 104 122 140 158 176 194

(0) (10) (20) (30) (40) (50) (60)(70) (80) (90)

Temperature F ( C)

20

3. DIMENSIONAL DATA

Outdoor Unit CU-3KS19NBU

23-15/16 5-11/32

11-17/32

1-3/8

ID:23/32

2-ID:15/16

15/32

13-19/32

12-19/32(320)

14-17/32

35-7/16(900)

2-15/16

1-13/16

2-1/16

23/32

29-1/8(740)

5-29/32 2-27/32 2-3/4

2-1/32 4-1/2

Wide tube service valve dia.3/8" (9.52) ×3

Narrow tube service valve dia.1/4" (6.35) ×3

2-3/4

2-15/16

4-7/16

Unit: inch(mm) (852-0-0010-11500-0)

21

Outdoor Unit CU-4KS24NBU

23-15/16 5-11/32

11-17/32

1-3/8

ID:23/32

2-ID:15/16

15/32

13-19/32

14-17/32

12-19/32(320)

35-7/16(900)

2-15/16

1-13/16

2-1/16

2-13/32

23/32

29-1/8(740)

2-3/4

5-29/32 2-27/32 2-3/4

2-1/32 4-1/2

Wide tube service valve dia.1/2" (12.70)

Narrow tube service valve dia.1/4" (6.35)

Wide tube service valve dia.3/8" (9.52)

2-3/4 2-3/4

2-15/16

4-7/16

×1

×4

×3

Unit: inch(mm) (852-0-0010-20500-0)

22

Outdoor Unit CU-4KS31NBU

23-15/16 5-11/32

11-17/32

1-3/8

ID:23/32

2-ID:15/16

15/32

13-19/32

14-17/32

12-19/32(320)

35-7/16(900)

2-15/16

1-13/16

2-1/16

2-13/32

23/32

35-1/32(890)

2-7/8 2-3/4 2-3/4

5-29/32

2-1/32 4-1/2

Wide tube service valve dia.1/2" (12.70) ×2

Narrow tube service valve dia.1/4" (6.35) ×4

Wide tube service valve dia.3/8" (9.52) ×2

2-3/4 2-3/4

2-15/16

4-7/16

Unit: inch(mm) (852-0-0010-20600-0)

23

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Outdoor Unit CU-3KS19NBU

Indoor unit Outdoor unit

Service valve on

Wide tube

O.D.3/8"

Narrow tube

O.D.1/4"

wide tube

CW

BW

AW

Header

Service valve on narrow tube

CN

BN

AN

Strainer Header

Electric expansion valve

M

Sub accumulator

Main accumulator

High pressure

switch

H.P.

Compressor

Heat exchanger

Cooling cycle

Insulation of Refrigerant Tubing

IMPORTANT

Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulation should be a min.5/16"(8 mm).

After a tube has been insulated,

CAUTION

never try to bend it into a narrow curve because it can cause the tube to break or crack.

24

Thickness: Min.5/16"(8 mm)

Wide tube

Insulation

Thickness: Min.5/16"(8 mm)

Narrow tube

Outdoor Unit CU-4KS24NBU

Indoor unit Outdoor unit

Service valve on

Wide tube

O.D.1/2"

O.D.3/8"

Narrow tube

O.D.1/4"

wide tube

DW

CW

BW

AW

Service valve on narrow tube

DN

CN

BN

AN

Header

Electric expansion valve

M

Strainer Header

Sub accumulator

Main accumulator

High pressure

switch

H.P.

Compressor

Heat exchanger

Cooling cycle

Insulation of Refrigerant Tubing

IMPORTANT

Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulation should be a min.5/16"(8 mm).

After a tube has been insulated,

CAUTION

never try to bend it into a narrow curve because it can cause the tube to break or crack.

25

Thickness: Min.5/16"(8 mm)

Wide tube

Insulation

Thickness: Min.5/16"(8 mm)

Narrow tube

Outdoor Unit CU-4KS31NBU

Indoor unit Outdoor unit

Service valve on

Wide tube

O.D.1/2"

O.D.3/8"

Narrow tube

O.D.1/4"

wide tube

DW

CW

BW

AW

Service valve on narrow tube

DN

CN

BN

AN

Header

Electric expansion valve

M

Strainer Header

Sub accumulator

Main accumulator

High pressure

switch

H.P.

Compressor

Heat exchanger

Cooling cycle

Insulation of Refrigerant Tubing

IMPORTANT

Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulation should be a min.5/16"(8 mm).

After a tube has been insulated,

CAUTION

never try to bend it into a narrow curve because it can cause the tube to break or crack.

26

Thickness: Min.5/16"(8 mm)

Wide tube

Insulation

Thickness: Min.5/16"(8 mm)

Narrow tube

5. PERFORMANCE DATA

5-1. Temperature Charts

5-1-1. Temperature Charts (CU-3KS19NBU)

Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS7NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

188

(1.3)

psig (MPaG)

174

(1.2)

160

(1.1)

Low pressure at wide tube service valve

146

(1.0)

Lo fan Hi fan HH fan

77

(25)

Indoor air temp. 86°F (30°C)

86

(30)

Outdoor air temperature °F (°C)

80°F (27°C)

75°F (24°C)

95

(35)

(2) Operating current performance chart

Lo fan Hi fan HH fan

5

4

Indoor air temp. 86°F (30°C)

(30)

86

80°F (27°C)

75°F (24°C)

95

(35)

3

Operating current (A)

2

77

(25)

Outdoor air temperature °F (°C)

(3) Indoor discharge air performance chart

104 (40)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

Lo fan Hi fan HH fan

Indoor air temp. 86°F (30°C)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

80°F (27°C)

75°F (24°C)

104 (40)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6t (7.5m). If the tubing length is different, the performance chart will vary.

27

Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

188

(1.3)

psig (MPaG)

174

(1.2)

160

(1.1)

Low pressure at wide tube service valve

146

(1.0)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

Lo fan Hi fan

6

5

4

Operating current (A)

3

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

HH fan

104 (40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

80°F (27°C)

75°F (24°C)

HH fan

104 (40)

28

Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS12NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

160

(1.1)

146

(1.0)

Low pressure at wide tube service valve

132

(0.9)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

Lo fan Hi fan

6

5

Indoor air temp. 86°F (30°C)

(30)

86

80°F (27°C)

75°F (24°C)

95

(35)

4

Operating current (A)

3

77

(25)

Outdoor air temperature °F (°C)

HH fan

104 (40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

HH fan

104 (40)

29

Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS18NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

160

(1.1)

146

(1.0)

Low pressure at wide tube service valve

132

(0.9)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

(2) Operating current performance chart

8

Lo fan Hi fan

7

95

(35)

HH fan

104 (40)

6

Operating current (A)

5

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104 (40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor discharge air temperature °F (°C)

46.4( 8)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

HH fan

104 (40)

30

Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NB4U ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

160

(1.1)

146

(1.0)

Low pressure at wide tube service valve

132

(0.9)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

6

Lo fan Hi fan

5

4

Operating current (A)

3

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

HH fan

104 (40)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104 (40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

80°F (27°C)

75°F (24°C)

HH fan

104 (40)

31

Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS12NB4U ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

160

psig (MPaG)

(1.1)

146

(1.0)

132

(0.9)

Low pressure at wide tube service valve

Lo fan Hi fan

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

HH fan

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

Lo fan Hi fan

6

5

Indoor air temp. 86°F (30°C)

(30)

86

80°F (27°C)

75°F (24°C)

95

(35)

4

Operating current (A)

3

77

(25)

Outdoor air temperature °F (°C)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Lo fan Hi fan

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

HH fan

104 (40)

Indoor discharge air temperature °F (°C)

42.8( 6)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104 (40)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

32

Outdoor Unit CU-3KS19NBU Indoor Unit CS-KS18NB4UW ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

160

psig (MPaG)

(1.1)

146

(1.0)

132

(0.9)

Low pressure at wide tube service valve

Lo fan Hi fan

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

HH fan

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104 (40)

(2) Operating current performance chart

Lo fan Hi fan

7

6

5

Operating current (A)

4

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

HH fan

104 (40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

42.8( 6)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

HH fan

104 (40)

33

5-1-2. Temperature Charts (CU-4KS24NBU)

Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS7NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

188

(1.3)

psig (MPaG)

174

(1.2)

160

(1.1)

Low pressure at wide tube service valve

146

(1.0)

Lo fan Hi fan HH fan

Indoor air temp. 86°F (30°C)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

80°F (27°C)

75°F (24°C)

(2) Operating current performance chart

Lo fan Hi fan HH fan

5

4

Indoor air temp. 86°F (30°C)

(30)

86

80°F (27°C)

75°F (24°C)

95

(35)

3

Operating current (A)

2

77

(25)

Outdoor air temperature °F (°C)

(3) Indoor discharge air performance chart

104 (40)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

Lo fan Hi fan HH fan

Indoor air temp. 86°F (30°C)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

80°F (27°C)

75°F (24°C)

104 (40)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6t (7.5m). If the tubing length is different, the performance chart will vary.

34

Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS9NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

188

(1.3)

psig (MPaG)

174

(1.2)

160

(1.1)

Low pressure at wide tube service valve

146

(1.0)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

Lo fan Hi fan

6

5

4

Operating current (A)

3

77

(25)

Outdoor air temperature °F (°C)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

95

(35)

HH fan

104 (40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

80°F (27°C)

75°F (24°C)

HH fan

104 (40)

35

Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS12NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

160

(1.1)

146

(1.0)

Low pressure at wide tube service valve

132

(0.9)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

Lo fan Hi fan

6

5

Indoor air temp. 86°F (30°C)

(30)

86

80°F (27°C)

75°F (24°C)

95

(35)

4

Operating current (A)

3

77

(25)

Outdoor air temperature °F (°C)

HH fan

104 (40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

HH fan

104 (40)

36

Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS18NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

160

(1.1)

146

(1.0)

Low pressure at wide tube service valve

132

(0.9)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

(2) Operating current performance chart

8

Lo fan Hi fan

7

95

(35)

HH fan

104 (40)

6

Operating current (A)

5

77

(25)

Outdoor air temperature °F (°C)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

95

(35)

104 (40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor discharge air temperature °F (°C)

46.4( 8)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

HH fan

104 (40)

37

Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS24NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

160

(1.1)

146

(1.0)

Low pressure at wide tube service valve

132

(0.9)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

86

(30)

Outdoor air temperature °F (°C)

75°F (24°C)

95

(35)

80°F (27°C)

(2) Operating current performance chart

9

Lo fan Hi fan

8

7

Operating current (A)

6

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

HH fan

104 (40)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104 (40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor discharge air temperature °F (°C)

46.4( 8)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

HH fan

104 (40)

38

Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS9NB4U ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

160

(1.1)

146

(1.0)

Low pressure at wide tube service valve

132

(0.9)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

6

Lo fan Hi fan

5

4

Operating current (A)

3

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

HH fan

104 (40)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104 (40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

80°F (27°C)

75°F (24°C)

HH fan

104 (40)

39

Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS12NB4U ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

160

psig (MPaG)

(1.1)

146

(1.0)

132

(0.9)

Low pressure at wide tube service valve

Lo fan Hi fan

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

HH fan

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

Lo fan Hi fan

6

5

Indoor air temp. 86°F (30°C)

(30)

86

80°F (27°C)

75°F (24°C)

95

(35)

4

Operating current (A)

3

77

(25)

Outdoor air temperature °F (°C)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Lo fan Hi fan

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

HH fan

104 (40)

Indoor discharge air temperature °F (°C)

42.8( 6)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104 (40)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

40

Outdoor Unit CU-4KS24NBU Indoor Unit CS-KS18NB4UW ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

160

psig (MPaG)

(1.1)

146

(1.0)

132

(0.9)

Low pressure at wide tube service valve

Lo fan Hi fan

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

HH fan

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104 (40)

(2) Operating current performance chart

Lo fan Hi fan

7

6

5

Operating current (A)

4

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

HH fan

104 (40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

42.8( 6)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

Lo fan Hi fan

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

HH fan

104 (40)

41

5-1-3. Temperature Charts (CU-4KS31NBU)

Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS7NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

146

(1.0)

118

(0.8)

Low pressure at wide tube service valve

(0.6)

Lo fan Hi fan Hi fan HH fan

Indoor air temp. 86°F (30°C)

90

77

(25)

86

(30)

Outdoor air temperature °F (°C)

80°F (27°C)

75°F (24°C)

95

(35)

(2) Operating current performance chart

5

Lo fan Hi fan Hi fan HH fan

4

Indoor air temp. 86°F (30°C)

Operating current (A)

3

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104 (40)

80°F (27°C)

75°F (24°C)

104 (40)

(3) Indoor discharge air performance chart

Lo fan Hi fan Hi fan HH fan

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor discharge air temperature °F (°C)

46.4( 8)

77

(25)

Outdoor air temperature °F (°C)

Indoor air temp. 86°F (30°C)

86

(30)

80°F (27°C)

75°F (24°C)

95

(35)

104 (40)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

42

Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS9NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

146

(1.0)

118

(0.8)

Low pressure at wide tube service valve

(0.6)

Lo fan Hi fan Hi fan HH fan

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

90

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

5

Lo fan Hi fan Hi fan HH fan

4

Indoor air temp. 86°F (30°C)

Operating current (A)

3

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104 (40)

80°F (27°C)

75°F (24°C)

104 (40)

(3) Indoor discharge air performance chart

Lo fan Hi fan Hi fan HH fan

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

77

(25)

Outdoor air temperature °F (°C)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

95

(35)

104 (40)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

43

Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS12NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

146

(1.0)

118

(0.8)

Low pressure at wide tube service valve

(0.6)

Lo fan Hi fan Hi fan HH fan

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

90

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

6

Lo fan Hi fan Hi fan HH fan

95

(35)

6°F (30°C)

5

4

Operating current (A)

3

77

(25)

Outdoor air temperature °F (°C)

Indoor air temp. 8

86

(30)

104 (40)

80°F (27°C)

75°F (24°C)

104 (40)

(3) Indoor discharge air performance chart

Lo fan Hi fan Hi fan HH fan

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

77

(25)

Outdoor air temperature °F (°C)

Indoor air temp. 86°F (30°C)

86

(30)

80°F (27°C)

75°F (24°C)

95

(35)

104 (40)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

44

Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS18NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

146

(1.0)

Indoor air temp. 86°F (30°C)

118

(0.8)

Low pressure at wide tube service valve

90

(0.6)

77

(25)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

Lo fan Hi fan

95

(35)

(2) Operating current performance chart

9

8

7

6

Operating current (A)

5

4

77

(25)

Outdoor air temperature °F (°C)

80°F (27°C)

Indoor air temp. 86°F (30°C)

75°F (24°C)

86

(30)

Lo fan Hi fan

95

(35)

104 (40)

(3) Indoor discharge air performance chart

Lo fan Hi fan

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

77

(25)

Indoor air temp. 86°F (30°C)

86

(30)

Outdoor air temperature °F (°C)

80°F (27°C)

75°F (24°C)

95

(35)

104 (40)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

45

Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS24NKU ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

146

(1.0)

118

(0.8)

Low pressure at wide tube service valve

90

(0.6)

77

(25)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

Lo fan Hi fan

95

(35)

(2) Operating current performance chart

12

11

10

Operating current (A)

9

8

77

(25)

Outdoor air temperature °F (°C)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

86

(30)

Lo fan Hi fan

95

(35)

104 (40)

(3) Indoor discharge air performance chart

Lo fan Hi fan

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

77

(25)

Outdoor air temperature °F (°C)

Indoor air temp. 86°F (30°C)

86

(30)

(35)

80°F (27°C)

75°F (24°C)

95

104 (40)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

46

Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS9NB4U ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

146

(1.0)

118

(0.8)

Low pressure at wide tube service valve

90

(0.6)

Lo fan Hi fan Hi fan HH fan

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

Lo fan Hi fan Hi fan HH fan

5

Operating current (A)

4

Indoor air temp. 86°F (30°C)

104

(40)

80°F (27°C)

75°F (24°C)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104

(40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

42.8( 6)

Indoor discharge air temperature °F (°C)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

Lo fan Hi fan Hi fan HH fan

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104

(40)

47

Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS12NB4U ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

146

(1.0)

118

(0.8)

Low pressure at wide tube service valve

90

(0.6)

Lo fan Hi fan Hi fan HH fan

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

(2) Operating current performance chart

Lo fan Hi fan Hi fan HH fan

6

5

Operating current (A)

4

Indoor air temp. 86°F (30°C)

104

(40)

80°F (27°C)

75°F (24°C)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104

(40)

(3) Indoor discharge air performance chart

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

Indoor discharge air temperature °F (°C)

42.8( 6)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

Lo fan Hi fan Hi fan HH fan

77

(25)

Indoor air temp. 86°F (30°C)

86

(30)

Outdoor air temperature °F (°C)

80°F (27°C)

75°F (24°C)

95

(35)

104

(40)

48

Outdoor Unit CU-4KS31NBU Indoor Unit CS-KS18NB4UW ×1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart

174

(1.2)

psig (MPaG)

146

(1.0)

Indoor air temp. 86°F (30°C)

118

(0.8)

Low pressure at wide tube service valve

90

(0.6)

77

(25)

80°F (27°C)

75°F (24°C)

86

(30)

Outdoor air temperature °F (°C)

Lo fan Hi fan

95

(35)

(2) Operating current performance chart

9

8

7

6

Operating current (A)

5

80°F (27°C)

Indoor air temp. 86°F (30°C)

75°F (24°C)

Lo fan Hi fan

104

(40)

77

(25)

86

(30)

Outdoor air temperature °F (°C)

95

(35)

104

(40)

(3) Indoor discharge air performance chart

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

46.4( 8)

42.8( 6)

39.2( 4)

Indoor discharge air temperature °F (°C)

77

(25)

Indoor air temp. 86°F (30°C)

86

(30)

Outdoor air temperature °F (°C)

NOTE

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.

Lo fan Hi fan

80°F (27°C)

75°F (24°C)

95

(35)

104

(40)

49

5-2. Cooling Capacity

Outdoor Unit : CU-3KS19NBU

Indoor Unit : CS-MKS9NKU × 3

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity >

RATING CAPACITY: 18,800 BTU/h AIR FLOW RATE: 777 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 65 75 85 95 105 115

59 76 (24.4) SHC 18,800 18,230 17,540 16,990 16,170 15,290

(15.0) 80 (26.7) SHC 18,880 18,230 17,540 16,990 16,170 15,290

63 76 (24.4) SHC 15,940 15,630 15,330 15,030 14,730 14,430

(17.2) 80 (26.7) SHC 18,650 18,350 18,050 17,880 17,030 16,120

o

F (oC) AMBIENT TEMP. oF (oC)

TC 18,880 18,230 17,540 16,990 16,170 15,290

72 (22.2) SHC 16,240 15,940 15,630 15,330 15,030 14,580

84 (28.9) SHC 18,880 18,230 17,540 16,990 16,170 15,290 88 (31.1) SHC 18,880 18,230 17,540 16,990 16,170 15,290

TC 19,800 19,130 18,420 17,880 17,030 16,120

72 (22.2) SHC 13,220 12,920 12,620 12,470 12,010 11,710

84 (28.9) SHC 19,800 19,130 18,420 17,880 17,030 16,120 88 (31.1) SHC 19,800 19,130 18,420 17,880 17,030 16,120

TC 20,730 20,050 19,320 # 18,800 17,920 16,970

(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)

72 (22.2) SHC 10,200 9,900 9,750 9,450 9,150 8,840

67 76 (24.4) SHC 12,920 12,620 12,310 12,160 11,860 11,560

(19.4) 80 (26.7) SHC 15,630 15,480 15,180 15,030 14,580 14,280

84 (28.9) SHC 18,350 18,050 17,900 17,600 17,290 16,970 88 (31.1) SHC 20,730 20,050 19,320 18,800 17,920 16,970

TC 21,650 20,970 20,220 19,730 18,830 17,850

72 (22.2) SHC 7,030 6,880 6,580 6,430 6,130 5,830

71 76 (24.4) SHC 9,750 9,450 9,300 9,000 8,690 8,390

(21.7) 80 (26.7) SHC 12,470 12,310 12,010 11,860 11,560 11,260

84 (28.9) SHC 15,180 15,030 14,730 14,580 14,280 13,970 88 (31.1) SHC 17,900 17,600 17,440 17,140 16,840 16,540

TC 22,470 21,780 21,020 20,570 19,650 18,620

75 76 (24.4) SHC 6,580 6,430 6,280 6,130 5,830 5,530

(23.9) 80 (26.7) SHC 9,450 9,300 9,000 8,840 8,540 8,240

84 (28.9) SHC 12,160 11,860 11,710 11,560 11,260 10,960 88 (31.1) SHC 14,880 14,580 14,430 14,280 13,970 13,670

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Rating conditions (#)

: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB : Outdoor Ambient Temp. 95 °F (35 °C) DB

2.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

3. Above data represents the value when the operation frequency of a compressor is fixed.

50

Outdoor Unit : CU-3KS19NBU

Indoor Unit : CS-MKS12NB4U × 3

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity >

RATING CAPACITY: 18,300 BTU/h AIR FLOW RATE: 706 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 65 75 85 95 105 115

59 76 (24.4) SHC 17,370 17,100 16,820 16,550 15,760 14,900

(15.0) 80 (26.7) SHC 18,370 17,750 17,080 16,550 15,760 14,900

63 76 (24.4) SHC 14,770 14,490 14,220 13,940 13,670 13,260

(17.2) 80 (26.7) SHC 17,230 16,960 16,690 16,410 16,140 15,710

o

F (oC) AMBIENT TEMP. oF (oC)

TC 18,370 17,750 17,080 16,550 15,760 14,900

72 (22.2) SHC 15,040 14,770 14,490 14,220 13,940 13,530

84 (28.9) SHC 18,370 17,750 17,080 16,550 15,760 14,900 88 (31.1) SHC 18,370 17,750 17,080 16,550 15,760 14,900

TC 19,260 18,620 17,930 17,410 16,590 15,710

72 (22.2) SHC 12,430 12,160 11,890 11,610 11,340 10,930

84 (28.9) SHC 19,260 18,620 17,930 17,410 16,590 15,710 88 (31.1) SHC 19,260 18,620 17,930 17,410 16,590 15,710

TC 20,150 19,500 18,800 # 18,300 17,450 16,540

(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)

72 (22.2) SHC 9,830 9,550 9,280 9,140 8,730 8,460

67 76 (24.4) SHC 12,160 11,890 11,610 11,470 11,060 10,790

(19.4) 80 (26.7) SHC 14,630 14,350 14,080 13,810 13,530 13,260

84 (28.9) SHC 16,960 16,690 16,410 16,270 15,860 15,590 88 (31.1) SHC 19,290 19,020 18,740 18,300 17,450 16,540

TC 21,050 20,390 19,670 19,200 18,330 17,390

72 (22.2) SHC 6,950 6,810 6,540 6,400 5,990 5,710

71 76 (24.4) SHC 9,280 9,140 8,870 8,730 8,320 8,040

(21.7) 80 (26.7) SHC 11,750 11,470 11,340 11,060 10,790 10,510

84 (28.9) SHC 14,080 13,940 13,670 13,530 13,120 12,850 88 (31.1) SHC 16,410 16,270 16,000 15,860 15,450 15,180

TC 21,830 21,170 20,440 20,010 19,120 18,040

75 76 (24.4) SHC 6,540 6,400 6,120 5,990 5,710 5,440

(23.9) 80 (26.7) SHC 9,000 8,870 8,590 8,460 8,180 7,910

84 (28.9) SHC 11,340 11,200 10,930 10,790 10,510 10,240 88 (31.1) SHC 13,670 13,530 13,260 13,120 12,850 12,570

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Rating conditions (#)

: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB : Outdoor Ambient Temp. 95 °F (35 °C) DB

2.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

3. Above data represents the value when the operation frequency of a compressor is fixed.

51

Outdoor Unit : CU-4KS24NBU Indoor Unit : CS-MKS9NKU × 3

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity >

RATING CAPACITY: 25,400 BTU/h AIR FLOW RATE: 777 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 65 75 85 95 105 115

59 76 (24.4) SHC 21,970 21,670 21,220 20,910 18,800 14,000

(15.0) 80 (26.7) SHC 24,840 24,530 23,960 23,340 18,890 14,000

63 76 (24.4) SHC 18,950 18,500 18,200 17,900 15,630 13,670

(17.2) 80 (26.7) SHC 21,820 21,370 20,910 20,610 18,500 14,270

o

F (oC) AMBIENT TEMP. oF (oC)

TC 25,520 24,880 23,960 23,340 18,890 14,000

72 (22.2) SHC 19,410 19,100 18,650 18,350 16,240 13,970

84 (28.9) SHC 25,520 24,880 23,960 23,340 18,890 14,000 88 (31.1) SHC 25,520 24,880 23,960 23,340 18,890 14,000

TC 26,760 25,900 24,950 24,370 19,290 14,270

72 (22.2) SHC 16,240 15,940 15,480 15,180 13,070 10,960

84 (28.9) SHC 24,380 24,080 23,630 23,330 19,290 14,270 88 (31.1) SHC 26,760 25,900 24,950 24,370 19,290 14,270

TC 27,750 26,880 25,910 # 25,400 19,630 14,500

(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)

72 (22.2) SHC 13,070 12,620 12,310 12,010 9,750 7,940

67 76 (24.4) SHC 15,780 15,330 14,880 14,730 12,470 10,660

(19.4) 80 (26.7) SHC 18,500 18,200 17,750 17,600 15,330 13,370

84 (28.9) SHC 21,220 20,760 20,460 20,160 17,900 14,500 88 (31.1) SHC 23,930 23,480 23,180 22,880 19,630 14,500

TC 28,690 27,810 26,830 26,400 19,890 14,670

72 (22.2) SHC 9,600 9,300 8,840 8,690 6,430 4,770

71 76 (24.4) SHC 12,310 12,010 11,560 11,410 9,150 7,340

(21.7) 80 (26.7) SHC 15,030 14,730 14,430 14,280 11,860 10,200

84 (28.9) SHC 17,750 17,440 16,990 16,840 14,580 12,920 88 (31.1) SHC 20,460 20,160 19,710 19,560 17,290 14,670

TC 29,440 28,560 27,580 26,850 20,020 14,760

75 76 (24.4) SHC 9,000 8,690 8,240 8,090 5,830 4,320

(23.9) 80 (26.7) SHC 11,710 11,410 11,110 10,810 8,690 7,190

84 (28.9) SHC 14,430 14,130 13,820 13,520 11,410 9,750 88 (31.1) SHC 17,140 16,840 16,390 16,240 13,970 12,470

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Rating conditions (#)

: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB : Outdoor Ambient Temp. 95 °F (35 °C) DB

2.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

3. Above data represents the value when the operation frequency of a compressor is fixed.

52

Outdoor Unit : CU-4KS24NBU

Indoor Unit : CS-KS18NB4UW + CS-MKS12NB4U + CS-MKS12NB4U

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity >

RATING CAPACITY: 24,800 BTU/h AIR FLOW RATE: 812 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 65 75 85 95 105 115

59 76 (24.4) SHC 22,360 21,880 21,410 21,100 18,300 13,510

(15.0) 80 (26.7) SHC 25,120 24,260 23,340 22,720 18,300 13,510

63 76 (24.4) SHC 19,040 18,730 18,260 17,940 15,890 13,790

(17.2) 80 (26.7) SHC 21,880 21,570 21,100 20,940 18,710 13,790

o

F (oC) AMBIENT TEMP. oF (oC)

(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)

TC 25,120 24,260 23,340 22,720 18,300 13,510

72 (22.2) SHC 19,520 19,040 18,570 18,410 16,360 13,510

84 (28.9) SHC 25,120 24,260 23,340 22,720 18,300 13,510 88 (31.1) SHC 25,120 24,260 23,340 22,720 18,300 13,510

TC 26,160 25,290 24,340 23,760 18,710 13,790

72 (22.2) SHC 16,210 15,890 15,420 15,260 13,050 11,160

84 (28.9) SHC 24,720 24,410 23,930 23,620 18,710 13,790 88 (31.1) SHC 26,160 25,290 24,340 23,760 18,710 13,790

TC 27,180 26,290 25,320 # 24,800 19,070 14,020

72 (22.2) SHC 12,890 12,580 12,260 11,950 9,740 8,000

67 76 (24.4) SHC 15,730 15,420 14,940 14,790 12,580 10,690

(19.4) 80 (26.7) SHC 18,730 18,260 17,940 17,630 15,420 13,680

84 (28.9) SHC 21,410 21,100 20,620 20,460 18,260 14,020 88 (31.1) SHC 24,250 23,780 23,460 23,300 19,070 14,020

TC 28,150 27,250 26,260 25,820 19,350 14,210

72 (22.2) SHC 9,420 9,110 8,790 8,630 6,430 4,690

71 76 (24.4) SHC 12,260 11,950 11,470 11,320 9,110 7,530

(21.7) 80 (26.7) SHC 15,100 14,790 14,470 14,310 12,100 10,370

84 (28.9) SHC 17,940 17,630 17,310 17,150 14,790 13,210 88 (31.1) SHC 20,780 20,310 19,990 19,830 17,630 14,210

TC 28,950 28,050 27,050 26,320 19,520 14,320

75 76 (24.4) SHC 8,790 8,480 8,160 8,000 5,800 4,380

(23.9) 80 (26.7) SHC 11,790 11,470 11,160 10,840 8,790 7,220

84 (28.9) SHC 14,470 14,310 13,840 13,680 11,470 10,050 88 (31.1) SHC 17,310 16,990 16,680 16,520 14,310 12,740

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Rating conditions (#)

: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB : Outdoor Ambient Temp. 95 °F (35 °C) DB

2.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

3. Above data represents the value when the operation frequency of a compressor is fixed.

53

Outdoor Unit : CU-4KS31NBU Indoor Unit : CS-MKS9NKU × 4

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity >

RATING CAPACITY: 30,600 BTU/h AIR FLOW RATE: 1,036 CFM

INDOOR OUTDOOR

o

ENT. TEMP.

WB DB 65 75 85 95 105 115

59 76 (24.4) SHC 27,890 27,280 26,680 26,480 22,750 16,560

(15.0) 80 (26.7) SHC 30,850 29,770 28,590 27,980 22,750 16,560

63 76 (24.4) SHC 23,660 23,260 22,660 22,450 19,840 16,930

(17.2) 80 (26.7) SHC 27,480 26,880 26,480 26,080 23,300 16,930

F (oC) AMBIENT TEMP. oF (oC)

TC 30,850 29,770 28,590 27,980 22,750 16,560

72 (22.2) SHC 24,260 23,660 23,260 22,860 20,440 16,560

84 (28.9) SHC 30,850 29,770 28,590 27,980 22,750 16,560 88 (31.1) SHC 30,850 29,770 28,590 27,980 22,750 16,560

TC 32,150 31,030 29,820 29,290 23,300 16,930

72 (22.2) SHC 20,040 19,640 19,030 18,830 16,420 13,800

84 (28.9) SHC 30,900 30,500 29,820 29,290 23,300 16,930 88 (31.1) SHC 32,150 31,030 29,820 29,290 23,300 16,930

TC 33,410 32,280 31,030 # 30,600 23,790 17,260

(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)

72 (22.2) SHC 15,820 15,410 15,010 14,810 12,200 9,780

67 76 (24.4) SHC 19,440 19,030 18,430 18,430 15,820 13,400

(19.4) 80 (26.7) SHC 23,260 22,660 22,250 22,050 19,440 17,020

84 (28.9) SHC 26,680 26,280 25,870 25,670 23,060 17,260 88 (31.1) SHC 30,300 29,900 29,290 29,290 23,790 17,260

TC 34,630 33,470 32,190 31,890 24,200 17,520

72 (22.2) SHC 11,390 10,990 10,590 10,380 7,770 5,560

71 76 (24.4) SHC 15,010 14,610 14,210 14,010 11,390 9,180

(21.7) 80 (26.7) SHC 18,830 18,230 17,830 17,830 15,010 13,000

84 (28.9) SHC 22,250 21,850 21,450 21,250 18,630 16,420 88 (31.1) SHC 25,870 25,470 25,070 24,870 22,250 17,520

TC 35,630 34,460 33,160 33,010 24,460 17,680

75 76 (24.4) SHC 10,790 10,380 9,980 9,780 7,170 5,150

(23.9) 80 (26.7) SHC 14,410 14,010 13,600 13,600 10,990 8,980

84 (28.9) SHC 18,030 17,630 17,220 17,220 14,410 12,400 88 (31.1) SHC 21,650 21,250 20,840 20,640 18,030 16,020

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Rating conditions (#)

: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB : Outdoor Ambient Temp. 95 °F (35 °C) DB

2.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

3. Above data represents the value when the operation frequency of a compressor is fixed.

54

Outdoor Unit : CU-4KS31NBU

Indoor Unit : CS-MKS9NB4U × 4

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity >

RATING CAPACITY: 28,600 BTU/h AIR FLOW RATE: 883 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 65 75 85 95 105 115

59 76 (24.4) SHC 25,810 25,470 24,960 24,610 21,300 15,500

(15.0) 80 (26.7) SHC 28,830 27,880 26,840 26,270 21,300 15,500

63 76 (24.4) SHC 22,040 21,700 21,180 21,010 18,610 15,830

(17.2) 80 (26.7) SHC 25,470 25,130 24,610 24,440 21,790 15,830

o

F (oC) AMBIENT TEMP. oF (oC)

TC 28,830 27,880 26,840 26,270 21,300 15,500

72 (22.2) SHC 22,560 22,210 21,700 21,360 19,130 15,500

84 (28.9) SHC 28,830 27,880 26,840 26,270 21,300 15,500 88 (31.1) SHC 28,830 27,880 26,840 26,270 21,300 15,500

TC 29,960 29,000 27,940 27,440 21,790 15,830

72 (22.2) SHC 18,780 18,270 17,930 17,580 15,360 12,960

84 (28.9) SHC 28,730 28,390 27,870 27,440 21,790 15,830 88 (31.1) SHC 29,960 29,000 27,940 27,440 21,790 15,830

TC 31,060 30,090 29,010 # 28,600 22,220 16,110

(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)

72 (22.2) SHC 14,840 14,500 13,980 13,810 11,410 9,180

67 76 (24.4) SHC 18,100 17,760 17,410 17,240 14,670 12,440

(19.4) 80 (26.7) SHC 21,530 21,180 20,840 20,670 18,100 15,870

84 (28.9) SHC 24,780 24,440 24,100 23,930 21,360 16,110 88 (31.1) SHC 28,210 27,700 27,360 27,180 22,220 16,110

TC 32,080 31,110 30,020 29,730 22,560 16,340

72 (22.2) SHC 10,730 10,380 10,040 9,870 7,470 5,410

71 76 (24.4) SHC 13,980 13,640 13,300 13,130 10,730 8,670

(21.7) 80 (26.7) SHC 17,410 17,070 16,730 16,560 14,160 12,100

84 (28.9) SHC 20,670 20,330 19,980 19,810 17,410 15,360 88 (31.1) SHC 23,930 23,580 23,240 23,240 20,670 16,340

TC 32,920 31,940 30,850 30,690 22,770 16,470

75 76 (24.4) SHC 10,040 9,700 9,360 9,360 6,780 4,900

(23.9) 80 (26.7) SHC 13,470 13,130 12,780 12,780 10,210 8,330

84 (28.9) SHC 16,730 16,380 16,040 16,040 13,470 11,760 88 (31.1) SHC 19,980 19,640 19,300 19,300 16,730 15,010

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Rating conditions (#)

: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB : Outdoor Ambient Temp. 95 °F (35 °C) DB

2.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

3. Above data represents the value when the operation frequency of a compressor is fixed.

55

5-3. Cooling Capacity (Low Ambient)

Outdoor Unit : CU-3KS19NBU

Indoor Unit : CS-MKS9NKU × 3

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity (Low Ambient) >

RATING CAPACITY: 18,800 BTU/h AIR FLOW RATE: 777 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 15 25 35 45 55

59 76 (24.4) SHC 18,950 19,090 18,950 18,950 18,950

(15.0) 80 (26.7) SHC 19,220 19,090 19,080 19,160 19,010

63 76 (24.4) SHC 15,780 19,540 15,780 15,940 15,780

(17.2) 80 (26.7) SHC 18,650 19,540 18,650 18,650 18,650

o

F (oC) AMBIENT TEMP. oF (oC)

TC 19,220 19,090 19,080 19,160 19,010

72 (22.2) SHC 16,390 19,090 16,240 16,390 16,240

84 (28.9) SHC 19,220 19,090 19,080 19,160 19,010 88 (31.1) SHC 19,220 19,090 19,080 19,160 19,010

TC 19,620 19,540 19,610 19,780 19,680

72 (22.2) SHC 13,220 19,540 13,070 13,220 13,220

84 (28.9) SHC 19,620 19,540 19,610 19,780 19,680 88 (31.1) SHC 19,620 19,540 19,610 19,780 19,680

TC 19,910 19,890 20,060 20,340 20,320

(-9.4) (-3.9) (1.7) (7.2) (12.8)

72 (22.2) SHC 9,900 19,890 9,900 10,050 10,050

67 76 (24.4) SHC 12,620 19,890 12,620 12,770 12,770

(19.4) 80 (26.7) SHC 15,330 19,890 15,480 15,480 15,480

84 (28.9) SHC 18,050 19,890 18,050 18,200 18,200 88 (31.1) SHC 19,910 19,890 20,060 20,340 20,320

TC 20,060 20,120 20,400 20,830 20,890

72 (22.2) SHC 6,430 20,120 6,580 6,730 6,730

71 76 (24.4) SHC 9,150 20,120 9,300 9,450 9,450

(21.7) 80 (26.7) SHC 12,010 20,120 12,160 12,310 12,310

84 (28.9) SHC 14,580 20,120 14,730 14,880 14,880 88 (31.1) SHC 17,290 20,120 17,440 17,600 17,600

TC 20,040 20,180 20,600 21,180 21,340

75 76 (24.4) SHC 5,980 20,180 6,130 6,280 6,280

(23.9) 80 (26.7) SHC 8,690 20,180 8,840 9,000 9,150

84 (28.9) SHC 11,410 20,180 11,560 11,710 11,710 88 (31.1) SHC 14,130 20,180 14,280 14,430 14,430

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

2. Above data represents the value when the operation frequency of a compressor is fixed.

56

Outdoor Unit : CU-3KS19NBU

Indoor Unit : CS-MKS12NB4U × 3

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity (Low Ambient) >

RATING CAPACITY: 18,300 BTU/h AIR FLOW RATE: 706 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 15 25 35 45 55

59 76 (24.4) SHC 17,510 18,570 17,510 17,510 17,510

(15.0) 80 (26.7) SHC 18,680 18,570 18,560 18,620 18,490

63 76 (24.4) SHC 14,630 18,960 14,770 14,770 14,770

(17.2) 80 (26.7) SHC 17,100 18,960 17,100 17,230 17,230

o

F (oC) AMBIENT TEMP. oF (oC)

TC 18,680 18,570 18,560 18,620 18,490

72 (22.2) SHC 15,180 18,570 15,180 15,180 15,180

84 (28.9) SHC 18,680 18,570 18,560 18,620 18,490 88 (31.1) SHC 18,680 18,570 18,560 18,620 18,490

TC 19,020 18,960 19,030 19,180 19,100

72 (22.2) SHC 12,300 18,960 12,300 12,430 12,430

84 (28.9) SHC 19,020 18,960 19,030 19,180 19,100 88 (31.1) SHC 19,020 18,960 19,030 19,180 19,100

TC 19,260 19,260 19,420 19,690 19,670

(-9.4) (-3.9) (1.7) (7.2) (12.8)

72 (22.2) SHC 9,420 19,260 9,550 9,690 9,550

67 76 (24.4) SHC 11,750 19,260 11,890 12,020 12,020

(19.4) 80 (26.7) SHC 14,220 19,260 14,350 14,350 14,350

84 (28.9) SHC 16,550 19,260 16,690 16,690 16,690 88 (31.1) SHC 18,880 19,260 19,020 19,020 19,020

TC 19,360 19,430 19,700 20,110 20,170

72 (22.2) SHC 6,400 19,430 6,540 6,670 6,670

71 76 (24.4) SHC 8,730 19,430 8,870 9,000 9,000

(21.7) 80 (26.7) SHC 11,200 19,430 11,340 11,470 11,470

84 (28.9) SHC 13,530 19,430 13,670 13,810 13,810 88 (31.1) SHC 15,860 19,430 16,000 16,140 16,140

TC 19,290 19,440 19,840 20,390 20,550

75 76 (24.4) SHC 5,850 19,440 5,990 6,120 6,120

(23.9) 80 (26.7) SHC 8,180 19,440 8,460 8,590 8,590

84 (28.9) SHC 10,510 19,440 10,790 10,930 10,930 88 (31.1) SHC 12,980 19,440 13,120 13,260 13,260

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

2. Above data represents the value when the operation frequency of a compressor is fixed.

57

Outdoor Unit : CU-4KS24NBU

Indoor Unit : CS-MKS9NKU × 3

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity (Low Ambient) >

RATING CAPACITY: 25,400 BTU/h AIR FLOW RATE: 777 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 15 25 35 45 55

59 76 (24.4) SHC 21,970 25,420 21,970 22,120 22,120

(15.0) 80 (26.7) SHC 24,840 25,420 24,840 24,840 24,840

63 76 (24.4) SHC 18,350 25,590 18,500 18,650 18,650

(17.2) 80 (26.7) SHC 21,220 25,590 21,370 21,520 21,520

o

F (oC) AMBIENT TEMP. oF (oC)

TC 25,470 25,420 25,470 25,670 25,610

72 (22.2) SHC 19,250 25,420 19,250 19,410 19,410

84 (28.9) SHC 25,470 25,420 25,470 25,670 25,610 88 (31.1) SHC 25,470 25,420 25,470 25,670 25,610

TC 25,540 25,590 25,780 26,160 26,210

72 (22.2) SHC 15,780 25,590 15,780 15,940 16,090

84 (28.9) SHC 23,930 25,590 23,930 24,080 24,230 88 (31.1) SHC 25,540 25,590 25,780 26,160 26,210

TC 25,380 25,550 25,930 26,510 26,700

(-9.4) (-3.9) (1.7) (7.2) (12.8)

72 (22.2) SHC 12,010 25,550 12,310 12,470 12,620

67 76 (24.4) SHC 14,730 25,550 15,030 15,180 15,330

(19.4) 80 (26.7) SHC 17,600 25,550 17,750 18,050 18,050

84 (28.9) SHC 20,160 25,550 20,460 20,610 20,760 88 (31.1) SHC 22,880 25,550 23,180 23,330 23,480

TC 24,930 25,240 25,840 26,690 27,040

72 (22.2) SHC 8,240 25,240 8,540 8,840 9,000

71 76 (24.4) SHC 10,960 25,240 11,260 11,560 11,710

(21.7) 80 (26.7) SHC 13,670 25,240 13,970 14,280 14,430

84 (28.9) SHC 16,390 25,240 16,690 16,990 17,140 88 (31.1) SHC 19,100 25,240 19,410 19,710 19,860

TC 24,210 24,680 25,530 26,670 27,190

75 76 (24.4) SHC 7,190 24,680 7,640 7,940 8,240

(23.9) 80 (26.7) SHC 10,050 24,680 10,500 10,810 10,960

84 (28.9) SHC 12,620 24,680 13,070 13,520 13,670 88 (31.1) SHC 15,330 24,680 15,780 16,090 16,390

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

2. Above data represents the value when the operation frequency of a compressor is fixed.

58

Outdoor Unit : CU-4KS24NBU

Indoor Unit : CS-KS18NB4UW + CS-MKS12NB4U + CS-MKS12NB4U

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity (Low Ambient) >

RATING CAPACITY: 24,800 BTU/h AIR FLOW RATE: 812 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 15 25 35 45 55

59 76 (24.4) SHC 22,200 24,830 22,200 22,200 22,200

(15.0) 80 (26.7) SHC 24,890 24,830 24,880 25,090 25,020

63 76 (24.4) SHC 18,570 25,050 18,570 18,730 18,890

(17.2) 80 (26.7) SHC 21,410 25,050 21,570 21,730 21,730

o

F (oC) AMBIENT TEMP. oF (oC)

(-9.4) (-3.9) (1.7) (7.2) (12.8)

TC 24,890 24,830 24,880 25,090 25,020

72 (22.2) SHC 19,360 24,830 19,360 19,520 19,520

84 (28.9) SHC 24,890 24,830 24,880 25,090 25,020 88 (31.1) SHC 24,890 24,830 24,880 25,090 25,020

TC 25,020 25,050 25,250 25,620 25,660

72 (22.2) SHC 15,730 25,050 15,890 16,050 16,050

84 (28.9) SHC 24,250 25,050 24,250 24,410 24,570 88 (31.1) SHC 25,020 25,050 25,250 25,620 25,660

TC 24,930 25,080 25,450 26,030 26,200

72 (22.2) SHC 12,100 25,080 12,260 12,420 12,580

67 76 (24.4) SHC 14,790 25,080 15,100 15,260 15,420

(19.4) 80 (26.7) SHC 17,780 25,080 17,940 18,260 18,260

84 (28.9) SHC 20,460 25,080 20,780 20,940 21,100 88 (31.1) SHC 23,300 25,080 23,460 23,780 23,780

TC 24,560 24,850 25,440 26,280 26,600

72 (22.2) SHC 8,160 24,850 8,480 8,790 8,950

71 76 (24.4) SHC 11,000 24,850 11,320 11,630 11,630

(21.7) 80 (26.7) SHC 13,840 24,850 14,160 14,470 14,630

84 (28.9) SHC 16,680 24,850 16,990 17,310 17,310 88 (31.1) SHC 19,360 24,850 19,680 19,990 20,150

TC 23,930 24,370 25,200 26,320 26,810

75 76 (24.4) SHC 7,220 24,370 7,690 8,000 8,160

(23.9) 80 (26.7) SHC 10,050 24,370 10,530 10,840 11,000

84 (28.9) SHC 12,890 24,370 13,370 13,680 13,840 88 (31.1) SHC 15,730 24,370 16,050 16,520 16,680

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

2. Above data represents the value when the operation frequency of a compressor is fixed.

59

Outdoor Unit : CU-4KS31NBU Indoor Unit : CS-MKS9NKU × 4

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity (Low Ambient) >

RATING CAPACITY: 30,600 BTU/h AIR FLOW RATE: 1,036 CFM

INDOOR OUTDOOR

o

ENT. TEMP.

WB DB 0515 25 35 45 55

59 76 (24.4) SHC 27,890 30,760 27,890 27,890 27,890

(15.0) 80 (26.7) SHC 30,870 30,760 30,800 31,010 30,890

63 76 (24.4) SHC 23,260 31,130 23,260 23,460 23,460

(17.2) 80 (26.7) SHC 26,880 31,130 27,080 27,280 27,280

F (oC) AMBIENT TEMP. oF (oC)

TC 30,870 30,760 30,800 31,010 30,890

72 (22.2) SHC 24,260 30,760 24,260 24,260 24,260

84 (28.9) SHC 30,870 30,760 30,800 31,010 30,890 88 (31.1) SHC 30,870 30,760 30,800 31,010 30,890

TC 31,140 31,130 31,320 31,720 31,730

72 (22.2) SHC 19,640 31,130 19,840 19,840 19,840

84 (28.9) SHC 30,500 31,130 30,700 30,700 30,700 88 (31.1) SHC 31,140 31,130 31,320 31,720 31,730

TC 31,150 31,270 31,660 32,300 32,450

(-17.8) (-15.0) (-9.4) (-3.9) (1.7) (7.2) (12.8)

72 (22.2) SHC 15,010 31,270 15,210 15,410 15,610

67 76 (24.4) SHC 18,630 31,270 18,830 19,030 19,030

(19.4) 80 (26.7) SHC 22,250 31,270 22,450 22,860 22,860

84 (28.9) SHC 25,870 31,270 26,080 26,280 26,480 88 (31.1) SHC 29,490 31,270 29,700 29,900 29,900

TC 30,850 31,120 31,750 32,680 33,020

72 (22.2) SHC 10,180 31,120 10,380 10,790 10,790

71 76 (24.4) SHC 13,600 31,120 14,010 14,410 14,410

(21.7) 80 (26.7) SHC 17,430 31,120 17,630 18,030 18,230

84 (28.9) SHC 21,050 31,120 21,250 21,650 21,650 88 (31.1) SHC 24,470 31,120 24,870 25,270 25,270

TC 30,230 30,670 31,570 32,820 33,340

75 76 (24.4) SHC 8,980 30,670 9,380 9,780 9,980

(23.9) 80 (26.7) SHC 12,600 30,670 13,200 13,600 13,600

84 (28.9) SHC 16,220 30,670 16,620 17,020 17,220 88 (31.1) SHC 19,840 30,670 20,240 20,640 20,840

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

2. Above data represents the value when the operation frequency of a compressor is fixed.

60

Outdoor Unit : CU-4KS31NBU

Indoor Unit : CS-MKS9NB4U × 4

Power Supply : 230V Single Phase 60Hz

< Cooling Capacity (Low Ambient) >

RATING CAPACITY: 28,600 BTU/h AIR FLOW RATE: 883 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 15 25 35 45 55

59 76 (24.4) SHC 25,980 28,790 25,810 25,980 25,980

(15.0) 80 (26.7) SHC 28,890 28,790 28,810 28,990 28,870

63 76 (24.4) SHC 21,700 29,150 21,700 21,870 21,870

(17.2) 80 (26.7) SHC 25,130 29,150 25,130 25,300 25,300

o

F (oC) AMBIENT TEMP. oF (oC)

TC 28,890 28,790 28,810 28,990 28,870

72 (22.2) SHC 22,560 28,790 22,560 22,730 22,560

84 (28.9) SHC 28,890 28,790 28,810 28,990 28,870 88 (31.1) SHC 28,890 28,790 28,810 28,990 28,870

TC 29,170 29,150 29,320 29,660 29,650

72 (22.2) SHC 18,440 29,150 18,440 18,610 18,610

84 (28.9) SHC 28,390 29,150 28,390 28,560 28,560 88 (31.1) SHC 29,170 29,150 29,320 29,660 29,650

TC 29,210 29,310 29,650 30,210 30,330

(-9.4) (-3.9) (1.7) (7.2) (12.8)

72 (22.2) SHC 14,160 29,310 14,330 14,500 14,500

67 76 (24.4) SHC 17,410 29,310 17,580 17,760 17,930

(19.4) 80 (26.7) SHC 20,840 29,310 21,010 21,180 21,360

84 (28.9) SHC 24,100 29,310 24,270 24,440 24,610 88 (31.1) SHC 27,360 29,310 27,530 27,870 27,870

TC 28,970 29,200 29,760 30,580 30,860

72 (22.2) SHC 9,700 29,200 9,870 10,210 10,210

71 76 (24.4) SHC 12,960 29,200 13,130 13,470 13,640

(21.7) 80 (26.7) SHC 16,380 29,200 16,560 16,900 17,070

84 (28.9) SHC 19,640 29,200 19,810 20,160 20,330 88 (31.1) SHC 22,900 29,200 23,240 23,410 23,580

TC 28,440 28,820 29,620 30,720 31,170

75 76 (24.4) SHC 8,500 28,820 9,010 9,360 9,530

(23.9) 80 (26.7) SHC 11,930 28,820 12,440 12,780 12,960

84 (28.9) SHC 15,360 28,820 15,700 16,040 16,210 88 (31.1) SHC 18,610 28,820 18,960 19,300 19,470

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

2. Above data represents the value when the operation frequency of a compressor is fixed.

61

6. ELECTRICAL DATA

6-1. Electric Wiring Diagrams

Outdoor Unit CU-3KS19NBU

62

8FA2-5251-11800-1

Outdoor Unit CU-4KS24NBU

63

8FA2-5251-11600-1

Outdoor Unit CU-4KS31NBU

64

8FA2-5251-11400-1

7. FUNCTIONS

7-1. Explanation of Functions

NOTE

The numerical values such as temperature, frequency, time and current in parentheses are an example

of CU-4KS31NBU and the values are different from the other models.

INITIAL

Control/conditions

Breaker is ON. Power is supplied to the indoor and outdoor unit

The ON/OFF operation button on the remote controller is pressed.

If automatic operation mode has been selected with the remote controller, operation begins in SENSOR DRY, or COOL mode depending on the room temperature and outdoor temperature at the time operation starts.

Depending on the operational mode, refer to the SENSOR DRY, or COOL item.

Unit operation Explanation

control circuits, however the unit remains stopped. Positioning of the outdoor unit electric expansion valve is performed.

This applies in the case of automatic COOL operation.

65

Control/conditions

Unit operation Explanation

COOL

The ON/OFF operation button on the remote controller is pressed.

The room temperature has reached the desired temperature.

The thermostat turns OFF.

The thermostat turns ON again.

The operation lamp illuminates.

The indoor fan operates at the set fan speed.

The outdoor unit stops.

The outdoor unit starts.

(Compressor and the outdoor fan start.)

When the frequency reaches Hz, frequency increases are stopped for a period of seconds. (Refer to Table 1.)

The frequency then increases.

The indoor temperature and the desired temperature are approximately equal.

After the thermostat turns ON again, the outdoor unit will not operate for 3 minutes, even if the room temperature increases above the desired temperature.

The outdoor unit does not operate for 3 minutes even after the breaker is turned ON.

The frequency is increased at the rate of 0.5 Hz every 1 seconds.

This is in order to stabilize the return of oil to the compressor.

If the indoor and outdoor temperatures are high, the current peak cut-off activates, stopping any increases in frequency.

Operating frequency is stabilized in order to maintain a comfortable environment.

The outdoor unit stops. (It does not stop if the thermostart for another indoor unit is ON.)

After 3 minutes, the outdoor unit begins operating automatically.

During these 3 minutes, a pressure balance is achieved, allowing the compressor to start more easily.

Freeze prevention In order to protect against freezing, the

Stop All indicator lamps turn OFF. The indoor and

Operation is restarted within 4 hours (only when AUTO mode is selected with the remote controller).

Operation starts after 4 hours or more have passed.

When the temperature of the indoor heat exchanger drops to approximately 35.6 °F or below, the compressor turns OFF, the outdoor fan turns OFF, and the indoor fan continues operating with no changes.

Approximately 3 minutes later, if the temperature of the indoor heat exchanger is adove 46.4 °F, the system returns to its original conditions.

outdoor units stop.

Starts operating in the same operating mode (COOL) and with the same temperature settings as before operation was stopped.

New operating mode is determined based on the temperature conditions at the time the ON/OFF operation button is pressed.

compressor stops temporarily, until the temperature of the indoor heat exchanger has risen.

Within 4 hours after operation was stopped, it is assumed that there has been no significant change in the indoor and outdoor temperatures, and the previous conditions (COOL) are stored.

Frequency control

(Hz)

Outdoor air temperature is below 32 °F.

(senconds)

Outdoor air temperature is 32 °F or higher.

(25) Hz

(35) Hz

(45) Hz

(55) Hz

(120) seconds

(60) seconds

(180) seconds

Table 1

66

(60) seconds

(30) seconds

(90) seconds

(1/f fluctuation fan)

SENSOR DRY

Control/conditions

The ON/OFF operation button on the remote controller is pressed.

The room temperature reaches the desired temperature, and there is no need for further cooling.

The room temperature is 59 °F or higher, and is slightly too cold.

Unit operation Explanation

The operation lamp illuminates.

The indoor fan operates at the set fan speed.

The outdoor unit stops.

The outdoor unit starts.

(Compressor and the outdoor fan start.)

When the frequency reaches Hz, frequency increases are stopped for a period of seconds. (Refer to Table 1.)

The frequency then increases.

DRY operation starts

DRY A operation

The indoor fan changes between "Low" and "LL" (very low) over a 6-minute cycle. This is 1/f fluctuation fan operation. (Refer to Fig. 1.)

DRY B operation

The indoor fan changes between "Low"

(1)

and "LL" (very low) over a 6-minute cycle. This is 1/f fluctuation fan operation.

The outdoor unit does not operate for 3 minutes even after the breaker is turned ON.

The frequency is increased at the rate of 0.5 Hz every 1 seconds.

This is in order to stabilize the return of oil to the compressor.

If the indoor and outdoor temperatures are high, the current peak cut-off activates, stopping any increases in frequency.

Operating frequency is stabilized in order to maintain a comfortable environment.

Operates to effectively dehumidify the air while not excessively reducing the indoor temperature.

The indoor unit operates at 1/f fluctuation fan operation, at a fan speed that does not cause a chilly feeling.

The compressor operates on a 3-minutes ON, 6-minutes OFF cycle, to prevent the room temperature from dropping too much.

The room temperature is below 59 °F.

1/f fluctuation fan

250

200

150

(Step)

100

50

0

After appoximately 3 minutes, the

(2)

compressor turns OFF, the outdoor fan turns OFF, and the indoor fan turns OFF.

After approximately 6 minutes, the

(3)

conditions return to (1).

Monitoring operation begins.

6-minute cycle

Fig. 1

When monitoring operation begins, the compressor stops, and the indoor fan operates at "LL" (very low) speed.

67

< Low Ambient Cooling Operation >

When the outdoor air temperature reaches 57.2 °F (14 °C ) or less during the cooling operation, the operation mode is switched to low ambient cooling operation. When the mode is switched from cooling opration to low ambient cooling operation, the compressor is stopped for 150 seconds temporarily.

When the mode has been switched to low ambient cooling operation, the outdoor fan speed is lowered as the outdoor air temperature falls.

Outdoor fan speed [ rpm ]

When the outdoor air temperature reaches 62.6 °F (17 °C ) or more during the low ambient cooling operation, the operation mode is switched to cooling operation. The following protective actions are available to prevent the compressor from operating with abnormal loads. At that time, they initiate thermo-off ( stopping the outdoor unit ) of the air conditioner.

32 °F ( °C )

Outdoor air temperature

Outdoor air temp. °F ( °C )

14 (-10)

8.6 (-13)

Compressor

Indoor fan

ON ON

OFF

ON

68

7-2. Protective Functions

NOTE

The numerical values such as temperature, frequency, time and current in parentheses are an example

of CU-4KS31NBU and the values are different from the other models.

7-2-1. Current Control

The operating current may rise as a result of causes including increasing cooling loads or decreases in power voltage. In these cases, the operating frequency is automatically reduced, or operation is stopped, in order to control the operating current so that it is (20 A) or less.

As a result:

Power breakers and fuses will not be tripped.

•

Operation can continue during this period with somewhat reduced cooling capacity.

•

Operation at normal capacity is restored when the cause of the current rise is eliminated.

•

Description of function

Example of operation for cooling

(20A) (17A)

(16.6A)

Target

frequency

Power Point C

Point B Point A

Frequency

Frequency Current

Operates at the target frequency at Point A and below.

• Stops increases to the frequency between Points A and B.

• Reduces the frequency by 1 Hz per 0.5 seconds when Point B is exceeded.

• Stops operation, and restarts it appoximately 3 minutes later, if Point C is exceeded.

• (May operate when sudden voltage fluctuations occur. Indicates trouble.)

Stops operation

Approx.3 minutes

(1) Automatic frequency control

The operating frequency is reduced automatically, or operation is stopped, in order to control the operating current so that it is at or below the values shown in the table below.

(20A)

COOL

Point C (peak cut trip)

Point B (Hz reduction)

Point A (Hz increase prohibit) (16.6)

(20.0)

(17.0)

69

(2) Current control

The operating frequency upper limits shown in the figure below are established for frequency reduction and increase-prohibit.

Current(A)

Trip

Hz reduction

Hz increase

prohibit

(16)

(15.6)

0

Example of operation during cooling

Hz reduction Hz increase prohibit

Hz reduction

Hz increase prohibit

(30)

Frequency (Hz)

7-2-2. Low Start Current

Operation starts at (8 Hz), and the start current is less than the normal operating current. This prevents the flickering of fluorescent lights or television screens that occurs when ordinary A/C units start.

7-2-3. Compressor Temperature Control

To protect the compressor coil from overheating, the operating frequency is controlled based on the compressor discharge temperature.

(°F)

Trip

(230)

5Hz every 30 sec. reduction

(223)

2Hz every 30 sec. reduction

(212)

Increase

No control

Compressor discharge temperature

(194)

prohibit range

(Hz reduction)

*

Within the increase-prohibit range, the range changes to the Hz reduction range (2 Hz every 30 seconds) if the compressor temperature rises by 4 °F.

70

8. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)

8-1. Precautions before Performing Inspection or Repair

Both the indoor unit and outdoor unit include electronic control circuits. Be sure to pay attention to the following before inspecting or repairing the outdoor-side electronic circuits.

High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge (charging voltage DC 311 V) even after the power is turned OFF, and some time is required for the charge to dissipate.

Be careful not to touch any electrified parts before the control circuit board Power Lamp (red) turns OFF.

If the outdoor control circuit board is normal, approximately 180 seconds will be required for the charge to dissipate. However, allow at least 30 minutes for the charge to dissipate if it is thought there might be trouble with the outdoor control circuit board.

For example, if the outdoor control circuit board fuse has blown, approximately 30 minutes will be required to discharge the high-capacity electrolytic capacitors.

71

8-2. Trouble Diagnosis by Error Monitor Lamps

Warning

To prevent electric shock, do not inspect or repair until the Power Lamp on the P.C.Board is turned off.

8-2-1. Location of the Error Monitor Lamps

Remove the top plate of outdoor unit and the cover of Electrical Component Box. The Power Lamp and Error Monitor Lamps are located on the P.C.Board of Electrical Component Box. (Fig.1)

Heat Exchanger Rear side P.C.Board of Electrical Component Box.

Error Monitor Lamps

Power Lamp

ERR0 ERR1 ERR2 ERR3

Front side

Fig.1 View from top

8-2-2. Display of the Error Monitor Lamps

If a protective device has activated or there is a sensor failure in the outdoor unit, the 4 error monitor lamps on the outdoor control circuit board will indicate the nature of the trouble.

: ON : OFF

Error Monitor Lamp

ERR0 ERR1 ERR2 ERR3

Sensor for compressor discharge temp

Sensor for heat excharge temp

Sensor for branch pipe A (Narrow tube)

Sensor for branch pipe B (Narrow tube)

Sensor for branch pipe C (Narrow tube)

Sensor for branch pipe D (Narrow tube)

Outdoor temp sensor

Sensor for branch pipe A (Wide tube)

Sensor for branch pipe B (Wide tube)

Sensor for branch pipe C (Wide tube)

Sensor for branch pipe D (Wide tube)

Error Contents

HIC circuit trouble (current, temp)

Actuation of comp over load relay

Actuation of freeze protection function

Outdoor unit error. Detail of error message indicate on indoor LED

72

8-3. Checking the Outdoor System

8-3-1. Checking the outdoor unit

No.

1

2

NOTE

Work procedure

Apply 220 V AC between terminals L1 and L2 on the

•

outdoor unit terminal plate.

Short-circuit the T-RUN terminal to the COM terminal

•

of TEST/T-RUN terminals.

The LED (red) on the control board must illuminate.•

The compressor and fan motor must turn ON.

•

(They turn ON about (70) seconds later after the power

is turned ON.)

Check items (unit operation)

If the above check items are okay, but the outdoor unit does not operate, there may be a faulty

connection between the indoor unit and the outdoor unit.

73

8-4. Trouble Diagnosis of Each Part

8-4-1. Problems of Each Part and Inspection Points

For details about the inspection points, refer to the Inspection Points for Each Part.

Problems

Inspection

points

Self-Diagnostics check

Indoor controller (control unit)

Indoor fan motor

Room temperature sensor

Heat exchanger temperature sensor

Indoor unitOutdoor unit

Inter-unit cable

Indoor unit

Indoor unit does not operate.

Operation lamp blinking.

Operation lamp does not illuminate.

Indoor fan dose not turn.

Outdoor unit

Outdoor unit does not operate.

Outdoor fan dose not turn.

The compressor (only) does not

operate.

The compressor stops on occasion.

The compressor speed does not

Others

No. of Inspection Points for Each part

increase.

The electric expansion valve does

not operate.

Does not cool or cooling

performance is inadequate.

Switch circuit board

Outdoor control circuit board

Diode module

HIC

Electrolytic capacitor

Fuse

Compressor

Compressor protective sensor

Outdoor fan motor

Coil thermistor

Electric expansion valve

Branch tubing temperature sensor

(1)

(2)

(3)

(4)

(5)

(6)

(7)

74

Problems

Inspection

points

Indoor unit

Indoor unit does not operate.

Operation lamp blinking.

Operation lamp does not illuminate.

Indoor fan dose not turn.

Outdoor unit

Outdoor unit does not operate.

Outdoor fan dose not turn.

The compressor (only) does not

operate.

The compressor stops on occasion.

The compressor speed does not

Others

No. of Inspection Points for Each part

increase.

The electric expansion valve does

not operate.

Does not cool or cooling

performance is inadequate.

Breaker

Refrigerant gas pressure

Others

8-4-2. Inspection Points for Each Part

(1) Outdoor control circuit board

Refer to 8-3-1. Checking the outdoor unit.

NOTE

(2) Fuse

Check it visually or the continuity with a tester.

(3) Compressor

Check for an open circuit in the compressor coil winding.

(4) Compressor protective sensor (compressor discharge temperature thermistor)

Check that the senseor is securely contained in the thermostart holder.

Do not remove or insert the outdoor control circuit board connector when power is being supplied to it.

(The controller will be damaged.)

(8)

(9)

(5) Coil thermistor

Check that the sensor is securely contained in the thermostat holder.

75

(6) Electric expansion valve

When replacing the electric expansion valve and coil, be sure to attach the connectors in the correct positions. Labels are applied to the valve body and coil, corresponding to the connector colors, to identify them.

Controller check

No voltage on circuit board

Check the illumination

of the red Power Lamp.

Replace the controller.

NOTE

Cool the main unit with a damp cloth or other means while welding. When applying vacuum, use the special service magnet and rotate at least 5 revolutions counterclockwise to fully open the electric expansion valve.

Use a multi-meter to measure the voltage (12 V).

When the power is turned ON, the needle will move in the

Voltage varies

Check the coil resistance.

0 ohm

Replace the coil.

No temperature change Temperature changes

Replace the electric

expansion valve.

Approx. 46 +/– 4 ohm

Open and close the

electric expansion valve

by hand to check it.

This part is normal.

following seguence in approximately 10 to 20 seconds for each point.

CU-3KS19NBU

CU-4KS24NBU CU-4KS31NBU

*1

Check elsewhere.

Model No. Sequence

MV0 MV1

MV0 MV1 MV2 MV3

Check the resistance between the gray lead wire and the other wires. Resistance is OK if it is 46 + / – 4ohm at 68 °F

Use the special service magnet and rotate 5 revolutions clockwise to fully close the valve. Then start the unit and measure the temperature at the inlet and outlet tubes of the electric expansion valve. If the temperature difference is large, the valve is closed. Then rotate 5 revolutions counterclockwise to open the valve. Operation is normal if the temperature difference between the 2 tubes drops.

MV2

*1 If you have manually checked the electric expansion valve, be sure to reapply the outdoor power after you have

replaced the wiring. (The position of the elecric expansion valve will changed.)

76

(7) Branch tubing temperature sensor

Check that the sensor is securely contained in the thermostat holder.

(8) Breaker

Check whether or not the breaker has been tripped.

Check that the breakers and fuses used are of the specified capacity.

Check that the breaker and its line are exclusive for A/C use.

(9) Refrigerant gas pressure

Start a COOL test run, and messure the temperatures of the A/C intake air and discharge air. Compare the values with the performance charts.

If the values are higher than the performance charts:

Check for refrigerant shortage or blockage of the refrigerant circuit.

< Assessment of refrigerant shortage >

1. The pressure in the low-pressure section is 5 MPa or more below the value in the performance charts.

2. There is little condensation on the indoor heart exchanger, which overall appears dry.

< Distinguishing between refrigerant shortage and refrigerant circuit blockage >

If the pressure in the low-pressure section does not change when the circuit is charged 2 to 3 times with

refrigerant gas (0.44 lbs each time), or if the change is small, then the problem may not be

refrigerant shortage.

The problem may be a blockage of the refrigerant circuit.

1. Check that there is no internal leakage inside the 4-way valve:

At the low-pressure side tubing, check that there is no temperature difference between the intake and

discharge of the 4-way valve.

2. Check that the electric expansion valve is not blocked. Check as described on the preceding page.

77

8-5. Trouble Diagnosis of Fan Motor

This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil resistance, and the following procedure should be used to check the motor. Perform the trouble diagnosis by Test Run mode described on Installation Instructions of indoor unit.

Important:

[Trouble symptom 1] The fan does not stop when the outdoor unit stops. Outdoor unit controller trouble

[Trouble symptom 2] The fan motor does not rotate when the outdoor unit is operating.

(Diagnostic procedure)

(Diagnostic results)

(Reference) DC motor connector pin arrangement

(A) Turn OFF the power before connecting or disconnecting the motor connectors. (B) When performing voltage measurement at the outdoor controller connector for (3) in the table

below, the DC motor will trip and voltage output will stop approximately 10 seconds after operation is started. For this reason, to measure the voltage again, first turn OFF the outdoor unit power, then, measure the voltage in Test Run mode.

* Disconnect the motor connectors and measure the voltage at the DC motor connectors on the outdoor

unit controller (3 locations).

Measurement location

(1) Vm-Gnd: Between pin 1 and pin 4 (2) Vcc-Gnd: Between pin 5 and pin 4 (3) Vsp-Gnd: Between pin 7 and pin 4

All of the above measured values are normal. Fan motor trouble (Replace the motor.) Any one of the above measured values is not normal. Outdoor unit controller trouble

DC 230V or more DC 14V or more After fluctuating 4 times between DC 1.7 to 6.1V (1 sec. ON) and DC 0 V (1 sec. OFF), the DC motor trips.

(Replace the controller .)

Normal value

Pin 1: Vm (red) Pin 2: Not used Pin 3: Not used Pin 4: Gnd (blue) Pin 5: Vcc (brown) Pin 6: PG (white) Pin 7: Vsp (orange)

[Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the outdoor

unit operates. (There is trouble in the system that provides feedback of motor rotation speed from the motor to the outdoor unit controller.)

[Trouble symptom 4] Fan motor rotation speed does not change during outdoor unit operation. [Trouble symptom 5] Fan motor rotation speed varies excessively during outdoor unit operation.

(Remedy for symptom 3 to 5)

It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble. Therefore, first replace the outdoor unit controller, then (if necessary) replace the DC motor.

78

9. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT

9-1. Characteristics of New Refrigerant R410A

9-1-1. What is New Refrigerant R410A?

R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture. Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant, R22.

9-1-2. Components (mixing proportions)

HFC32 (50%) / HFC125 (50%)

9-1-3. Characteristics

Less toxic, more chemically stable refrigerant

The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase. Thus, when there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in composition of the remaining refrigerant. Therefore, do not add new refrigerant. Instead, recover the remaining refrigerant with the refrigerant recovery unit. Then, after evacuation, totally recharge the specified amount of refrigerant with the new refrigerant at its normal mixed composition state (in liquid phase).

When refrigerant R410A is used, the composition will differ depending on whether it is in gaseous or liquid phase, and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in gaseous state. Thus, always charge the refrigerant while it is in liquid phase.

CAUTION

Ether-type oil is used for compressor oil for R410A-type units, which is different from the mineral oil used for R22. Thus more attention to moisture prevention and faster replacement work compared with conventional models are required.

79

9-2. Checklist before Servicing

Use a clutch-type flare tool for R410A or the conventional flare tool. Note that sizes of the resultant flares differ between these two tools. Where a conventional flare tool is used, make sure to observe A Specification (amount of extrusion) by using the flare spacer.

Diameter of tube D

Dia.1/4" (6.35 mm)

Dia.3/8" (9.52 mm)

Dia.1/2" (12.7 mm)

Dia.5/8" (15.88 mm)

Size of flare

Tubing precautions

Specification A

Flare tool for R410A Conventional flare tool (for R22)

0 to 0.0196"

(0 to 0.5 mm)

D

Flare tool for R410A

A

Conventional flare tool (R22)

D

0.0472"

(1.2 mm)

Spacer

A

Refrigerant R410A is more easily affected by dust or moisture compared with R22, thus be sure to temporarily cover the ends of the tubing with caps or tape prior to installation.

Never use 0.0276" (0.7 mm)-thick copper tubing or tubing which is less than 0.0315" (0.8 mm) in thickness, since air conditioners with R410A are subject to higher pressure than those using R22 and R407C.

No addition of compressor oil for R410A

No additional charge of compressor oil is permitted.

No use of refrigerant other than R410A

Never use a refrigerant other than R410A.

If refrigerant R410A is exposed to fire

Through welding, etc., toxic gas may be released when R410A refrigerant is exposed to fire. Therefore, be sure to provide ample ventilation during installation work.

Caution in case of R410A leak

Check for possible leak points with the special leak detector for R410A. If a leak occurs inside the room, immediately provide thorough ventilation.

80

9-3. Tools Specifically for R410A

For servicing, use the following tools for R410A

Tool Distinction Tool Name

Gauge manifold

Charging hose

Gas leak detector

Refrigerant cylinder

Charging cylinder

Refrigerant recovery unit

Tools specifically for R410A

Vacuum pump with anti-reverse flow (*1)

(Solenoid valve-installed type, which prevents oil from flowing back into the

unit when the power is off, is recommended.)

Vacuum pump (*2)...can be used if the following adapter is attached.

Vacuum pump adapter (reverse-flow prevention adapter) (*3).

(Solenoid valve-installed adapter attached to a conventional vacuum pump.)

Electronic scale for charging refrigerant

Flare tool

Bender

Tools which can be com-

monly used for R22,

R407C, and R410A

CAUTION

To prevent other refrigerants (R22, R407C) from being mistakenly charged to this unit, shape and external diameter of the service port screw has been altered. <External diameter of service port> R410A : 5/16" R22, R407C : 1/4"

The above tools specifically for R410A must not be used for R22 and R407C. Doing so will cause malfunction of the unit.

For the above vacuum pump (*1, *2) and vacuum pump adapter (*3), those for R22-type units can be used for R410A-type. However, they must be used exclusively for R410A and never alternately with R22 and R407C.

Torque wrench

Cutter, reamer

Welding tool, nitrogen gas cylinder

9-4. Tubing Installation Procedures

When the tubes are connected, always apply HAB oil on the flare portions to improve the sealing of tubing.

The following is the HAB oil generally used:

Esso: ZERICE S32

NOTE

For details on tubing installation procedures, refer to the installation manuals attached to the indoor unit and outdoor unit.

81

9-5. In Case of Compressor Malfunction

CAUTION

Should the compressor malfunction, be sure to make the switch to a replacement compressor as quickly as possible.

Use only the tools indicated exclusively for R410A. See "9-3. Tools Specifically for R410A."

9-5-1. Procedure for Replacing Compressor

(1) Recovering refrigerant

Any remaining refrigerant inside the unit should not be released to the atmosphere, but recovered using the refrigerant recovery unit for R410A.

Do not reuse the recovered refrigerant, since it will contain impurities.

(2) Replacing Compressor

Soon after removing seals of both discharge and suction tubes of the new compressor, replace it quickly.

(3) Checking for sealing

Use nitrogen gas for the pressurized gas, and never use a refrigerant other than R410A. Also do not use oxygen or any flammable gas.

(4) Evacuation

(1) Recover refrigerant

OK

(2) Replace compressor

OK

(3) Check for sealing

OK

Use a solenoid valve-installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption, the valve will prevent the pump oil from flowing back.

The equipment may be damaged if moisture remains in the tubing, thus carry out the evacuation thoroughly.

When using a vacuum pump with exhaust air volume more than 0.883 cu.ft./min. and ultimate vacuum pressure rate of 50 micron Hg.

Standard time for evacuation

Length of tubing

Evacuation time

Less than 33 ft. (10 m)

More than 10 minutes

(4) Evacuation

OK

(5) Recharge

More than 33 ft. (10 m)

More than 15 minutes

82

(5) Recharging

Configuration and characteristics of cylinders

Be sure to charge the specified amount of refrigerant in liquid state using the service port

of the wide tube service valve. The proper amount is listed on the unit's nameplate.

When the entire amount cannot be charged all at once, charge gradually while operating the unit in Cooling Operation.

CAUTION

Never charge a large amount of liquid refrigerant at once to the unit. This may cause damage to the compressor.

When charging with a refrigerant cylinder, use an electronic scale for charging refrigerant. In this case, if the volume of refrigerant in the cylinder becomes less than 20% of the fully-charged amount, the composition of the refrigerant starts to change. Thus, do not use the refrigerant if

the amount in the charging cylinder is less than 20%.

Also, charge the minimum necessary amount to the charging cylinder before using it to charge the air conditioning unit.

Valve

Liquid

Single valve

Charge liquid refrigerant with cylinder in up-side-down position.

Fig. 1

Valve

Example:

In case of charging refrigerant to a unit requiring

1.68 lb. (0.76 Kg) using a capacity of a 22 lb. (10 Kg) cylinder, the minimum necessary amount for the cylinder is:

1.68 + 22 0.20 = 6.08 lb. (0.76 + 10 0.20 = 2.76 Kg)

For the remaining refrigerant, refer to the instructions of the refrigerant manufacturer.

If using a charging cylinder, transfer the specified amount of liquid refrigerant from the refrigerant cylinder to the charging cylinder.

Prepare an evacuated charging cylinder beforehand.

CAUTION

To prevent the composition of R410A from changing, never bleed the refrigerant gas into the atmosphere while transferring the refrigerant. (Fig. 3)

Charging

cylinder

Open

Liquid

Single valve (with siphon tube)

Charge with cylinder in normal position.

Fig. 2

NO!

Liquid

Refrigerant

cylinder

Do not use the refrigerant if the amount in the charging cylinder is less than 20%.

83

Fig. 3

9-6. In Case Refrigerant is Leaking

CAUTION

Never attempt to charge additional refrigerant when refrigerant has been leaking from the unit. Follow the procedure described below to locate points of leaks and carry out repairs, then recharge the refrigerant.

(1) Detecting Leaks

Use the detector for R410A to locate refrigerant leak points.

(2) Recovering refrigerant

Never release the gas to the atmosphere; recover residual refrigerant using the refrigerant recovery unit for R410A, instead.

Do not reuse the recovered refrigerant because its composition will have been altered.

(3) Welding leaking points

Confirm again that no residual refrigerant exists in the unit before starting welding.

Weld securely using flux and wax for R410A.

Prevent oxide film from forming inside the tubes utilizing substitution with nitrogen (N2) in the refrigerant circuit of the unit. Leave ends of tubes open during welding.

(1) Detect leaks

OK

(2) Recover refrigerant

OK

(3) Weld leaking points

OK

(4) Checking for sealing

Use nitrogen gas for the pressurized gas, and never use a refrigerant other than R410A. Also do not use oxygen or any flammable gas.

(5) Evacuation

Use a solenoid valve-installed vacuum pump so that

even if power is cut off in the middle of evacuation of air due to a power interruption, the valve will prevent the pump oil from flowing back.

The equipment may be damaged if moisture remains in the tubing, thus carry out the evacuation thoroughly.

When using a vacuum pump with exhaust air volume more than 0.883 cu.ft./min. and ultimate vacuum pressure rate of 50 micron Hg.

Standard time for evacuation

Length of tubing

Evacuation time

(6) Recharging

Less than 33 ft. (10 m)

More than 10 minutes

(4) Check for sealing

OK

(5) Evacuation

OK

(6) Recharge

More than 33 ft. (10 m)

More than 15 minutes

Recharge unit in the same manner explained on the previous page "(5) Recharging."

84

9-7. Charging Additional Refrigerant

9-7-1. When Tubes are Extended

Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit. Charge additional refrigerant in liquid state only.

CAUTION

Never charge additional refrigerant if refrigerant is leaking from the unit. Follow instructions given in "9-6. In Case Refrigerant is Leaking" and completely carry out repairs. Only then should you recharge the refrigerant.

9-8. Retro-Fitting Existing Systems

9-8-1. Use of Existing Units

Never use new refrigerant R410A for existing units which use R22. This will cause the air conditioner to

operate improperly and may result in a hazardous condition.

9-8-2. Use of Existing Tubing

If replacing an older unit that used refrigerant R22 with a R410A unit, do not use its existing tubing. Instead, completely new tubing must be used.

85

APPENDIX A

INSTALLATION INSTRUCTIONS

CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU

(852-6-4190-581-00-1)

A-1

For Outdoor Unit

INSTALLATION INSTRUCTIONS Split System Air Conditioner

This air conditioner uses the refrigerant R410A.

NOTE

External diameter of service port R410A: 5/16"

Contents

Page

IMPORTANT!

Please Read Before Starting .................................. 2

Model Combinations

Combine indoor and outdoor units only as listed below.

Model No.

Indoor Unit Outdoor Unit

CS-MKS7NKU CU-3KS19NBU

CS-MKS9NKU CU-4KS24NBU

CS-MKS12NKU CU-4KS31NBU

CS-MKS18NKU

CS-MKS24NKU

CS-MKS9NB4U

CS-MKS12NB4U

CS-KS18NB4UW

Power Source: 60 Hz, single-phase, 230 / 208 VAC

1. GENERAL .......................................................... 4

1-1. Tools Required for Installation (not supplied) 1-2. Accessories Supplied with Unit 1-3. Optional Copper Tubing Kit 1-4. Type of Copper Tube and Insulation Material 1-5. Additional Materials Required for Installation

2. INSTALLATION SITE SELECTION ................... 5

2-1. Indoor Unit 2-2. Connecting Indoor Units 2-3. Outdoor Unit 2-4. Baffle Plate for the Outdoor Unit 2-5. Outer Dimensions of Outdoor Unit 2-6. Diagram of Outdoor Unit Installation

3. INSTALLATION PROCESS .............................. 16

3-1. Embedding the Tubing and Wiring 3-2. Use of the Flaring Method 3-3. Flaring Procedure with a Flare Tool 3-4. Caution before Connecting Tubes Tightly 3-5. Tubing Connections 3-6. Insulation of Refrigerant Tubing 3-7. Taping the Tubes 3-8. Finishing the Installation

Combination example

Indoor unit B

Indoor unit A

Outdoor unit

Indoor unit D

Indoor unit C

4. AIR PURGING................................................... 19

 Air Purging with a Vacuum Pump (for Test Run)  Pump Down

5. WIRING INSTRUCTIONS ................................ 22

5-1. General Precautions on Wiring 5-2. Recommended Wire Length and Diameter 5-3. Wiring System Diagram 5-4. How to Connect Wiring to the Terminal 5-5. Wiring Instructions for the Outdoor Unit

6. TEST RUN......................................................... 26

7. CONNECTING A HOME AUTOMATION

DEVICE ............................................................. 27

8. INSTALLATION CHECK SHEET ...................... 27

85264190581001 2011 CV6233187761

IMPORTANT! Please Read Before Starting

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.

When Installing…

For safe installation and trouble-free operation, you must:



Carefully read this instruction booklet before beginning.



Follow each installation or repair step exactly as shown.



Observe all local, state, and national electrical codes.



Pay close attention to all warning and caution notices given in this manual.

This symbol refers to a hazard

WARNING

CAUTION

or unsafe practice which can result in severe personal injury or death.

This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage.

If Necessary, Get Help

These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

Select an installation location which is rigid and strong enough to support or hold the unit, and select a location for easy maintenance.

…In a Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the unit’s weight. It may be necessary to construct a strong wood or metal frame to provide added support.

…In a Room

Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping and water damage to walls and floors.

Keep the fire alarm and the air

CAUTION

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

…In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle.

…In a Snowy Area

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

outlet at least 1.5 m away from the unit.

WARNING

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are completed or reconnected and checked.

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system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or

death.

 *URXQGWKHXQLW following local electrical codes.

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heating at connection points and a possible fire hazard.

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the unit must be grounded.

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

When Connecting Refrigerant Tubing

 :KHQSHUIRUPLQJpiping work

do not mix air except for specified refrigerant (R410A) in refrigeration cycle. It causes capacity down, and risk of explosion and injury due to high tension inside the refrige-

WARNING

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gas leaks during the installation. Be careful not to allow contact of the refrigerant gas with a flame as this will cause the generation of poisonous gas.

2

rant cycle.

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cause fire.

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other than specified type. It may cause product damage, burst and injury etc.

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the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection.

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or re-installation, and while repairing refrigeration parts. Handle liquid refrigerant carefully as it may cause frostbite.

When Servicing

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before opening the unit to check or repair electrical parts and wiring.

 .HHS\RXUILQJHUVDQGFORWKLQJDZD\IURPDQ\PRYLQJ

parts.

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that no metal scraps or bits of wiring have been left inside the unit being serviced.

Others

CAUTION

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the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas.

 &RQILUPXSRQFRPSOHWLQJLQVWDOODWLRQWKDWQRUHIULJHUDQW

gas is leaking. If escaped gas comes in contact with a stove, gas water heater, electric room heater or other heat source, it can produce dangerously toxic gas.

 'RQRWLQVWDOORQO\DVLQJOHLQGRRUXQLW

 'RQRWWRXFKWKHDLULQOHWRUWKHVKDUSDOXPLQXP

fins of the outdoor unit. You may get injured.

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accidentally.

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You may be injured and the unit may be damaged.

NOTE

The illustrations are based on the typical appearance of a standard model. Consequently, the shape may differ from that of the air conditioner that you are installing.

3

1. General

This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instructions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning. If the electric wiring diagram does not appear in this manual, please check for the diagram on the indoor unit.

1-1. Tools Required for Installation (not supplied)

1. Standard screwdriver

2. Phillips head screwdriver

3. Knife or wire stripper

4. Tape measure

5. Carpenter’s level

6. Sabre saw or key hole saw

1-2. Accessories Supplied with Unit

Table 1

Parts Figure Q’ty Parts Figure Q’ty Parts Figure Q’ty

Labels for inter-unit cable and tube

Reducer (3/8" 1/2")

A B C D

CU-3KS19NBU

7. Hacksaw

8. Core bits

9. Hammer

10. Drill

11. Tube cutter

12. Tube flaring tool

4 each

Cushion rubber 4

1

13. Torque wrench

14. Adjustable wrench

15. Reamer (for deburring)

16. Vacuum pump (For R410A)

17. Manifold valve

Reducer (1/2" 3/8")

CU-4KS24NBU

CU-4KS31NBU

Packed in the outdoor unit.

1

2

1-3. Optional Copper Tubing Kit

Copper tubing for connecting the outdoor unit to the indoor unit is available in kits which contain the narrow and wide tubing, fittings and insulation. Consult your nearest sales outlet or air conditioning workshop.

1-4. Type of Copper Tube and Insulation Material

If you wish to purchase these materials separately from a local source, you will need:

1. Deoxidized annealed copper tube for refrigerant tubing as detailed in Table 2.

Cut each tube to the appropriate lengths 1' to 1'4" (30 cm to 40 cm) to dampen vibration between units.

Table 2

Model

CS-MKS7NKU, CS-MKS9NKU, CS-MKS12NKU

CS-MKS18NKU

CS-MKS24NKU

CS-MKS9NB4U, CS-MKS12NB4U

CS-KS18NB4UW

Outer Dia. Thickness Outer Dia. Thickness

1/4" (6.35 mm) 0.0314" (0.8 mm) 3/8" (9.52 mm) 0.0314" (0.8 mm)

1/4" (6.35 mm) 0.0314" (0.8 mm) 1/2" (12.70 mm) 0.0314" (0.8 mm)

1/4" (6.35 mm) 0.0314" (0.8 mm) 5/8" (15.88 mm) 0.0393" (1.0 mm)

1/4" (6.35 mm) 0.0314" (0.8 mm) 3/8" (9.52 mm) 0.0314" (0.8 mm)

1/4" (6.35 mm) 0.0314" (0.8 mm) 1/2" (12.70 mm) 0.0314" (0.8 mm)

Narrow Tube Wide Tube

2. Foamed polyethylene insulation for the specified copper tubes as required to precise length of tubing. Wall thickness of the insulation should be not less than 5/16" (8 mm).

3. Use insulated copper wire for field wiring. Wire size varies with the total length of wiring. Refer to 5. Wiring Instructions for details.

CAUTION

Check local electrical codes and regulations before obtaining wire. Also, check any specified instructions or limitations.

1-5. Additional Materials Required for Installation

1. Refrigeration (armored) tape

2. Insulated staples or clamps for connecting wire (See local codes.)

3. Putty

4. Refrigeration lubricant

5. Clamps or saddles to secure refrigerant tubing

4

2. Installation Site Selection

2-1. Indoor Unit

To prevent abnormal heat generation

WARNING

AVOID:

 direct sunlight.

 nearby heat sources that may affect performance of the

unit.

 areas where leakage of flammable gas may be expected.

and the possibility of fire, do not place obstacles, enclosures and grilles in front of or surrounding the air conditioner in a way that may block air flow.

Indoor unit

Drain hose

Outside drainage

Fig. 1

For wall-mounted units

 placing or allowing any obstructions near the air conditioner

inlet or outlet.

 installing in rooms that contain instant-on (rapid-start)

fluorescent lamps. (These may prevent the air conditioner from receiving signals.)

 places where large amounts of oil mist exist.

 installing in locations where there are devices that

generate high-frequency emissions.

DO:

 select an appropriate position from which every corner of

the room can be uniformly air-conditioned. (High on a wall is best for wall-mounted types.)

 select a location that will hold the weight of the unit.

 select a location where tubing and drain hose have the

shortest run to the outside. (Fig. 1)

 allow room for operation and maintenance as well as

unrestricted air flow around the unit. (Fig. 2a or 2b)

 install the unit within the maximum elevation difference

(H1, H2, H3, H4) above or below the outdoor unit and within a total tubing length (L1+L2+L3, L1+L2+L3+L4) from the outdoor unit as detailed in Table 3 and Fig. 3a.

INDOOR UNIT (1)

Elevation difference (H1)

H4

INDOOR UNIT (4)

Tubing length (L1)

OUTDOOR UNIT

L4

L2

L3

INDOOR UNIT (2)

INDOOR UNIT (3)

H2

H3

2" (5 cm)

min.

Front View

Fig. 2a

For ceiling-mounted cassette units

3.3 ft. (1m)

3.3 ft.

(1m)

Fig. 2b

CAUTION

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mounted cassette unit will be degraded if the distance from the floor to the ceiling is greater than 10 ft. (3 m).

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air conditioner, do not install wall-mounted units less than 5' (1.5 m) from floor level. (Fig. 3b)

6" (15 cm) min.

(1m)

3.3 ft. (1m)

Indoor unit

Minimum height from floor level

5' (1.5 m)

Floor level

2" (5 cm)

min.

3.3 ft.

3.3 ft. (1m)

Wall

Fig. 3a

Fig. 3b

5

 install the indoor unit more than 3.3' (1 m) away from any

antenna or power lines or connecting wires used for television, radio, telephone, security system, or intercom. Electrical noise from any of these sources may affect operation.

 install in a sturdy manner to avoid increased operating

noise.

Table 3

Max. Max. Allowable Total Limit of Limit of Elevation Required Amount

Allowable Tubing Length Total Tubing Length Difference of Additional

Model Tubing Length at Shipment (L1+L2+L3) or (H1, H2, H3, H4) Refrigerant

Per Unit (L1+L2+L3) or (L1+L2+L3+L4) (ft.) (oz./ft.)*

(ft.) (L1+L2+L3+L4) (ft.)

(ft.)

CU-3KS19NBU 82 150 (L1+L2+L3) 150 (L1+L2+L3) 50 —

CU-4KS24NBU 82 150 (L1+L2+L3+L4) 200 (L1+L2+L3+L4) 50 0.22

CU-4KS31NBU 100 150 (L1+L2+L3+L4) 230 (L1+L2+L3+L4) 50 0.22

* If total tubing length becomes 150 to 200 ft. (Max.) or 150 to 230 ft. (Max.), charge additional refrigerant (R410A) by 0.22 oz./ft.

No additional charge of compressor oil is necessary. For more detailed charging information, refer to the Technical & Service Manual.

6

2-2. Connecting Indoor Units

Figures (4a) – (4k) show the different types of indoor unit connections, including the use of a reducer. To select the required indoor unit to be connected, refer to the Combination Table that was included in the outdoor unit package.

(1) Connecting indoor unit for CU-3KS19NBU

(A)

3/8"(9.52mm)

3/8"(9.52

mm

Outdoor unit Indoor unit

C

1/4"(6.35

B

)

A

)

1/4"(6.35

mm

)

3/8"(9.52

mm

)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

Fig. 4a

(B)

3/8"(9.52mm)

3/8"(9.52

mm

Flare 3/8"(9.52

A joint for connecting tubes of different sizes (3/8"(9.52mm) 1/2"(12.70mm)) Supplied Reducer

Outdoor unit Indoor unit

C

1/4"(6.35mm)

B

)

A

)

Union 1/2"(12.70mm)

mm

)

1/4"(6.35

mm

)

3/8"(9.52

1/2"(12.70

mm

)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

)

(CS-MKS18NKU) (CS-KS18NB4UW)

(2) Connecting indoor unit for CU-4KS24NBU

(A)

(1/2"(12.70

Outdoor unit Indoor unit

D

1/2"(12.70mm)

3/8"(9.52

mm

1/4"(6.35

C

)

B

)

A

)

1/4"(6.35

mm

Fig. 4b

mm

) 3/8"(9.52mm)) Supplied Reducer

Union 3/8"(9.52mm)Flare 1/2"(12.70mm)

mm

)

3/8"(9.52

mm

)

Fig. 4c

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

7

(B)

1/2"(12.70

3/8"(9.52

mm

(C)

1/2"(12.70mm)

3/8"(9.52mm)

3/8"(9.52

mm

Outdoor unit Indoor unit

D

)

C

)

B

)

A

)

1/4"(6.35

mm

)

1/2"(12.70

3/8"(9.52

mm

)

Fig. 4d

(1/2"(12.70mm) 5/8"(15.88mm)) Locally purchased

Union 5/8"(15.88mm)Flare 1/2"(12.70mm)

Outdoor unit Indoor unit

D

1/4"(6.35

C

1/4"(6.35

B

)

A

)

1/4"(6.35

mm

5/8"(15.88mm)

)

3/8"(9.52

)

3/8"(9.52

)

3/8"(9.52

)

mm

)

(CS-MKS18NKU) (CS-KS18NB4UW)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

(CS-MKS24NKU)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

(D)

1/2"(12.70

3/8"(9.52

Fig. 4e

(3/8"(9.52 Locally purchased

Outdoor unit Indoor unit

D

mm

)

C

mm

)

B

)

A

)

1/4"(6.35

mm

)

mm

)

mm

)

mm

) 1/2"(12.70mm))

Union 1/2"(12.70

1/2"(12.70

mm

)

1/2"(12.70mm)

3/8"(9.52

mm

)

)Flare 3/8"(9.52mm)

)

Fig. 4f

(CS-MKS18NKU) (CS-KS18NB4UW)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

8

(3) Connecting indoor unit for CU-4KS31NBU

(A)

mm

1/4"(6.35

mm

1/2"(12.70mm)

1/2"(12.70

3/8"(9.52

mm

(1/2"(12.70

Outdoor unit Indoor unit

D

C

)

B

)

A

)

1/4"(6.35

(B)

) 3/8"(9.52mm)) Supplied Reducer

Union 3/8"(9.52mm)Flare 1/2"(12.70mm)

mm

3/8"(9.52

mm

)

mm

)

mm

)

3/8"(9.52

)

3/8"(9.52

Fig. 4g

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

1/2"(12.70

3/8"(9.52

3/8"(9.52mm)

(C)

1/2"(12.70

3/8"(9.52

(1/2"(12.70mm 3/8"(9.52mm)) Supplied Reducer

Union 3/8"(9.52mm)Flare 1/2"(12.70mm)

Outdoor unit Indoor unit

D

mm

)

C

)

B

)

A

1/4"(6.35

mm

)

1/2"(12.70

)

3/8"(9.52

mm

)

Fig. 4h

Outdoor unit Indoor unit

D

mm

)

C

)

B

)

A

)

1/4"(6.35

mm

)

1/2"(12.70

3/8"(9.52

mm

)

(CS-MKS18NKU) (CS-KS18NB4UW)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

(CS-MKS18NKU) (CS-KS18NB4UW)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

Fig. 4i

9

(D)

1/2"(12.70

1/2"(12.70mm)

3/8"(9.52

mm

(E)

mm

(1/2"(12.70

Outdoor unit Indoor unit

D

)

C

B

)

A

)

1/4"(6.35

(1/2"(12.70mm) 3/8"(9.52mm))Supplied Reducer

mm

) 5/8"(15.88mm))Locally purchased

Union 5/8"(15.88mm)Flare 1/2"(12.70mm)

mm

)

mm

)

1/4"(6.35

)

Union 3/8"(9.52mm)Flare 1/2"(12.70mm)

5/8"(15.88

3/8"(9.52

mm

)

3/8"(9.52

mm

)

mm

)

Fig. 4j

(CS-MKS24NKU)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

1/2"(12.70

3/8"(9.52

3/8"(9.52mm)

(1/2"(12.70

Outdoor unit Indoor unit

D

mm

)

C

)

B

)

A

1/4"(6.35

mm

) 5/8"(15.88mm)) Locally purchased

Union 5/8"(15.88mm)Flare 1/2"(12.70mm)

mm

5/8"(15.88

)

1/2"(12.70

)

3/8"(9.52

)

3/8"(9.52

)

mm

)

Fig. 4k

(CS-MKS24NKU)

(CS-MKS18NKU) (CS-KS18NB4UW)

(CS-MKS7NKU,CS-MKS9NKU,CS-MKS12NKU) (CS-MKS9NB4U,CS-MKS12NB4U)

10

2-3. Outdoor Unit

)

AVOID:

 heat sources, exhaust fans, etc. (Fig. 5a)

 damp, humid or uneven locations.

DO:

 choose a place as cool as possible.

 choose a place that is well ventilated.

 install in a location where at least two sides are unob-

structed, so that the flow of air at the intake port or exhaust port is not blocked, and so that sufficient space is ensured for maintenance to be carried out without trouble. In general the top also must be unobstructed. (Fig. 5b)

 provide a solid base (level concrete pad, concrete block,

6"  1'4" (15  40 cm) beams or equal), a minimum of 6" (15 cm) above ground level to reduce humidity and protect the unit against possible water damage and decreased service life. (Figs. 5c and 5d)

NO

Hot air

Outdoor unit

Air intake Min. 8" (20 cm)

Min.

4" (10 cm)

Air discharge

Fig. 5a

Exhaust fan

Heat source

Valve side Min. 10" (25 cm)

Min. 1’8" (50 cm)

Fig. 5b

Obstacle above

Min.

7' (2 m)

Air discharge

Ground

Min. 8" (20 cm)

Air intake

Drain holes

Min.

7' (2 m

Obstacle

CAUTION

A solid base must not cover the hole of the bottom plate.

 install cushion rubber under unit’s feet to reduce vibration

and noise. (Fig. 5e)

 use lug bolts or equal to bolt down unit, reducing vibration

and noise.

 install in a location where no antenna of a television or

radio exists within 10' (3 m).

2-4. Baffle Plate for the Outdoor Unit

NOTE

It is recommended to use baffle plates.

When the outdoor unit is installed in a position exposed to strong wind (such as seasonal winds with low air temperature in winter), baffle plates must be installed on the outdoor unit. (Fig. 5f)

This unit is designed so that the fan of the outdoor unit runs at low speed when the air conditioner is operated at low outdoor air temperatures. When the outdoor unit is exposed to strong wind, the system pressure drops because of the freeze protector.

Install a pair of windbaffle plates at the front and back of the outdoor unit if it will be subject to strong wind during the winter. (Figs. 5f, 5g, 5h, 5i, and 5j)

Air intake

Concrete or equal

Back

About 16" (40 cm)

Air intake baffle

Wind

Fig. 5c

Anchor bolts (4 pcs.)

Min. 6" (15 cm)

About 6" (15 cm)

Fig. 5d

Cushion rubber

Fig. 5e

Front

Wind

11

Air discharge baffle

No air intake baffle required on this side.

Fig. 5f

(1) Recommended dimensions of the baffle plates

Air Intake Baffle

C

E

D

F

B

G

A

3- 1/4"

(3- 6.5 mm)

Fig. 5g

2- 15/64"

(2- 6 mm)

R

Q

H

O

J

L

I

K

Air Discharge Baffle

B

H

4- 1/4"

G

(4- 6.5 mm)

E

A

G

F

D

I

J

C

K

Fig. 5h

For Air Intake

Dimensions

Model

CU-3KS19NBU, CU-4KS24NBU

CU-4KS31NBU

(inch)

(mm) 640 20 50 635 270 270 10 20 15 657 7.5 10 150 20 20

(inch)

(mm) 640 20 35 785 350 350 10 20 15 807 7.5 10 150 20 20

ABCDE FGH I J KLOQR

25-3/16 25/32 1-31/32 25 10-5/8 10-5/8 25/64 25/32 19/32 25-7/8 19/64 25/64 5-29/32 25/32 25/32

25-3/16 25/32 1-3/8

30-29/32 13-25/32 13-25/32

25/64 25/32 19/32

For Air Discharge

Dimensions

Model

CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU

(inch)

(mm) 560 585 350 150 490 35 55 465 60 85 25

ABCDE FGH I J K

22-1/16 23-1/32 13-25/32 5-29/32 19-9/32 1-3/8 2-5/32 18-5/16 2-3/8 3-11/32 31/32

Material to be used: Metal plate with corrosion protection treatment Plate thickness: 0.0394 to 0.0472" (1.0 to 1.2 mm)

(2) Parts required (field supply except for screws)

Air Intake Baffle

Item Q’ty Remarks

Baffle plate 1

Screw 5/32  15/32" (4  12 mm) tapping 2 Attached to outdoor unit

Bolt 15/64  19/32 – 25/32" (M6  15 – 20 mm) 3

Nut 15/64" (M6) 3

Washer 3

Spring washer 3

31-25/32

19/64 25/64 5-29/32 25/32 25/32

Air Discharge Baffle

Item Q’ty Remarks

Baffle plate 1

Bolt 15/64  13/32 – 19/32" (M6  10 – 15 mm) 4

Nut 15/64" (M6) 4

Washer 4

Spring washer 4

12

(3) Installation procedure

1. Air Intake Baffle

(1) Left side

1. Remove the top panel from the unit.

2. Remove the panel side L, and drill 3 holes of ø1/4 inch (6.5 mm) at the prescribed position.

3. Install the windbaffle on the unit using field supply bolts and nuts.

4. Recommended bolts to be used are 15/64" (M6 ISO standard), and the recommended length of the bolts is between 19/32 – 25/32 inch (15 – 20 mm).

5. Use washers and spring washers to tightly fasten the windbaffle to the unit.

(2) Right side

1. Remove the top panel from the unit.

2. Use 2 preholes on the panel side R to install the baffle plate.

3. Remove the panel side R from the unit by removing the screws. These screws are used in step 4 below.

4. Put (sandwich) the windbaffle between the unit and the panel side R, then install the windbaffle on the unit using the above screws. Be careful not to damage the screw holes.

Panel top

Panel front

2. Air Discharge Baffle

1. Remove the panels front, top, side L and R from the unit and drill 4 holes of ø1/4 inch (6.5 mm) at the prescribed positions.

2. Install the windbaffle on the unit using field supply bolts and nuts.

3. Recommended bolts to be used are 15/64" (M6 ISO standard), and the recommended length of the bolts is between 13/32 – 19/32 inch (10 – 15 mm).

4. Use washers and spring washers to tightly fasten the windbaffle to the unit.

Panel side R

Panel top

Panel side R

Panel front

Panel side L

Fig. 5i Fig. 5j

NOTE

 In order to prevent contact of the bolts and heat exchanger and other parts inside the unit, install the windbaffle using

bolts from inside the unit and fasten the bolts with nuts from outside the unit.

 When the windbaffle is installed on the unit, the unit has higher wind resistance. In order to prevent the unit from

falling over, anchor the legs of the unit using anchor bolts (or similar method).

(4) Precautions for installation

1. Be sure not to damage painted surfaces.

2. Finish the edges of the windbaffle to avoid cuts or injury.

3. Drilling of holes must be carefully done so that no damage is caused to external or internal parts of the unit. Particular care must be taken that drill chips do not drop into the unit.

13

2-5. Outer Dimensions of Outdoor Unit

(1) CU-3KS19NBU

23-15/16

(2) CU-4KS24NBU

23-15/16

5-11/32

15/32

A

5-11/32

15/32

A

13-19/32

12-19/32

13-19/32

14-17/32

A

35-7/16 (900)

Fig. 6a

A

35-7/16 (900)

2-29/32

23/32

1-13/16

2-1/16

29-1/8 (740)

2-27/32

29-1/8 (740)

2-3/4

5-29/32

2-3/4

2-1/32

4-1/2

Service valve on narrow tube side (Outer diameter 1/4"(

Service valve on wide tube side (Outer diameter 3/8"(

2-3/4

2-15/16

4-7/16

Service valve on wide tube side (Outer diameter 1/2"(12.70))

Service valve on narrow tube side (Outer diameter 1/4"(6.35))

2-3/4

6.35

9.52

))

(3) CU-4KS31NBU

23-15/16

5-11/32

15/32

A

12-19/32

13-19/32

14-17/32

Fig. 6b

A

35-7/16 (900)

2-29/32

23/32

1-13/16

2-1/16

2-13/32

23/32

1-13/16

2-1/16

2-13/32

2-27/32

5-29/32

2-3/4

35-1/32 (890)

2-27/32

5-29/32

2-1/32

4-1/2

2-15/16

4-7/16

Service valve on wide tube side (Outer diameter 3/8"(9.52))

Service valve on narrow tube side (Outer diameter 1/4"(6.35))

Service valve on wide tube side (Outer diameter 1/2"(12.70))

2-3/4

2-15/16

4-7/16

Service valve on wide tube side (Outer diameter 3/8"(9.52))

Fig. 6c

14

unit: inch (mm)

Panasonic CU-3KS19NBU, CS-MKS12NKU, CU-4KS24NBU User Manual

TECHNICAL & SERVICE MANUAL

SAFETY PRECAUTIONS

Table of Contents

1. OPERATING RANGE

2. SPECIFICATIONS

2-1. Unit Specifications

2-2. Major Component Specifications

2-3. Other Component Specifications

3. DIMENSIONAL DATA

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

5. PERFORMANCE DATA

5-1. Temperature Charts

5-2. Cooling Capacity

5-3. Cooling Capacity (Low Ambient)

6. ELECTRICAL DATA

6-1. Electric Wiring Diagrams

7. FUNCTIONS

7-1. Explanation of Functions

7-2. Protective Functions

8. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)

8-1. Precautions before Performing Inspection or Repair

8-2. Trouble Diagnosis by Error Monitor Lamps

8-3. Checking the Outdoor System

8-4. Trouble Diagnosis of Each Part

8-5. Trouble Diagnosis of Fan Motor

9. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT

9-1. Characteristics of New Refrigerant R410A

9-2. Checklist before Servicing

9-3. Tools Specifically for R410A

9-4. Tubing Installation Procedures

9-5. In Case of Compressor Malfunction

9-6. In Case Refrigerant is Leaking

9-7. Charging Additional Refrigerant

9-8. Retro-Fitting Existing Systems