Panasonic CU-4KS31NBU service manual CS-KS18NB4UW + CS-MKS12NB4U + CS-MKS12NB4U

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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. o F (o C)

 

 

AMBIENT TEMP. o F (o C)

 

 

 

WB

 

DB

 

65

75

85

 

95

105

115

 

 

 

 

 

(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

 

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

 

 

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

 

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

 

 

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.

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Contents DC Inverter MULTI-SYSTEM AIR Conditioner Safety Precautions Prohibit Table of Contents Appendix a Semi-Concealed Type Wall Mounted TypeOperating Range Outdoor Unit CU-3KS19NBU Unit SpecificationsIndoor Unit CS-MKS9NKU × Duct Less Type RatedIndoor Unit Outdoor Unit208V CU-4KS24NBU BTU/h/W Compressor Locked Rotor Amperes 20,600 CU-4KS31NBU Indoor Unit CS-MKS9NKU 4units Outdoor Unit CU-4KS31NBU 1unit 24,200 Outdoor Unit Major Component SpecificationsOutdoor Unit CU-4KS24NBU Outdoor Unit CU-4KS31NBU CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU Other Component SpecificationsDimensional Data Unit inchmm 852-0-0010-20500-0 Unit inchmm 852-0-0010-20600-0 Insulation of Refrigerant Tubing Refrigerant Flow DiagramIndoor unit Outdoor unitIndoor unit Outdoor unit 1/4 Strainer Header Sub Main Compressor Accumulator Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS7NKU × Temperature ChartsTemperature Charts CU-3KS19NBU Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NKU × Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS12NKU × Cooling CharacteristicsOutdoor Unit CU-3KS19NBU Indoor Unit CS-MKS18NKU × Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS9NB4U × Outdoor Unit CU-3KS19NBU Indoor Unit CS-MKS12NB4U × Outdoor Unit CU-3KS19NBU Indoor Unit CS-KS18NB4UW × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS7NKU × Temperature Charts CU-4KS24NBUOutdoor Unit CU-4KS24NBU Indoor Unit CS-MKS9NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS12NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS18NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS24NKU × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS9NB4U × Outdoor Unit CU-4KS24NBU Indoor Unit CS-MKS12NB4U × Outdoor Unit CU-4KS24NBU Indoor Unit CS-KS18NB4UW × Temperature Charts CU-4KS31NBU Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS9NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS12NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS18NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS24NKU × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS9NB4U × Outdoor Unit CU-4KS31NBU Indoor Unit CS-MKS12NB4U × Outdoor Unit CU-4KS31NBU Indoor Unit CS-KS18NB4UW × Indoor Outdoor Cooling CapacityCS-MKS12NB4U × Power Supply 230V Single Phase 60Hz Cooling CapacityCS-MKS9NKU × CS-KS18NB4UW + CS-MKS12NB4U + CS-MKS12NB4U 30,600 BTU/h CS-MKS9NB4U × Cooling Capacity Low Ambient 15,180 18,570 19,250 25,420 19,410 19,360 24,830 19,520 24,260 30,760 22,560 28,790 22,730 Outdoor Unit CU-3KS19NBU 8FA2-5251-11800-1 Electric Wiring DiagramsOutdoor Unit CU-4KS24NBU 8FA2-5251-11600-1 Outdoor Unit CU-4KS31NBU 8FA2-5251-11400-1 Explanation of Functions FunctionsCool DRY Fluctuation fanLow Ambient Cooling Operation Current Control Protective FunctionsDescription of function Automatic frequency controlCurrent control Compressor Temperature ControlLow Start Current Precautions before Performing Inspection or Repair Troubleshooting Before Calling for ServiceDisplay of the Error Monitor Lamps Trouble Diagnosis by Error Monitor LampsLocation of the Error Monitor Lamps Checking the outdoor unit Work procedure Check items unit operationChecking the Outdoor System Trouble Diagnosis of Each Part Problems of Each Part and Inspection PointsOutdoor control circuit board Inspection Points for Each PartFuse CompressorCU-3KS19NBU MV0 MV1 MV2 CU-4KS24NBU MV3 CU-4KS31NBU Electric expansion valveRefrigerant gas pressure Branch tubing temperature sensorBreaker Diagnostic results Diagnostic procedureRemedy for symptom 3 to Trouble Diagnosis of Fan MotorWhat is New Refrigerant R410A? Characteristics of New Refrigerant R410ACharacteristics Components mixing proportionsChecklist before Servicing Tools Specifically for R410A Tubing Installation ProceduresCase of Compressor Malfunction Procedure for Replacing CompressorExample Amount in the charging cylinder is less than 20%To prevent the composition R410A from changingRecharging Case Refrigerant is LeakingWelding leaking points Charging Additional Refrigerant When Tubes are ExtendedRetro-Fitting Existing Systems Use of Existing Units852-6-4190-581-00-1 For Outdoor Unit ContentsPlease Read Before Starting ‡ 8VHWKHIODUHPHWKRGIRUFRQQHFWLQJWXELQJ Fins of the outdoor unit. You may get injuredGeneral For ceiling-mounted cassette units Installation Site SelectionFor wall-mounted units H1, H2, H3, H4 Connecting indoor unit for CU-4KS24NBU Connecting Indoor UnitsConnecting indoor unit for CU-3KS19NBU 815.88mm Locally purchased Connecting indoor unit for CU-4KS31NBU CS-MKS24NKU It is recommended to use baffle plates Baffle Plate for the Outdoor UnitFront BackAir Discharge Baffle Air Intake BafflePrecautions for installation CU-3KS19NBU Outer Dimensions of Outdoor UnitCU-4KS24NBU CU-4KS31NBUNever install only a single indoor unit Diagram of Outdoor Unit InstallationUse of the Flaring Method Installation ProcessFlaring Procedure with a Flare Tool Tubing Connections To 0.5 mm Adjust so that the amount of tubeTo prevent heat loss and wet floors due to dripping of con Insulation of Refrigerant Tubing For wall-mounted units  For ceiling-mounted cassette units Air Purging with a Vacuum Pump for Test Run Finishing the InstallationAir Purging Adapter manual, and use the adapter correctly External diameter of service port R410A 5/16Pump-down procedure What is pump-down? Pump Down If pump-down is not possibleRecommended Wire Length and Diameter Wiring InstructionsGeneral Precautions on Wiring Disconnect switch may be required by national or local codes For Outdoor Unit  For solid core wiring or F-cable How to connect wiring to the terminal For stranded wiring For Indoor UnitIndoor unit D Wiring Instructions for the Outdoor UnitIndoor unit B Indoor unit CPerforming a test run Checking tubing and wiringTest Run Installation Check Sheet Connecting a Home Automation DeviceDC1111-0