Panasonic CU-4KS31NBU 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

Panasonic CU-4KS31NBU 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