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TECHNICAL & SERVICE MANUAL
CS-KS30NKU + CU-KS30NKUA
CS-KS36NKU + CU-KS36NKUA
DC INVERTER SPLIT SYSTEM AIR CONDITIONER
Indoor Model No. Product Code No. Outdoor Model No. Product Code No.
CS-KS30NKU 1 852 360 86 CU-KS30NKUA 1 852 360 84
CS-KS36NKU 1 852 360 87 CU-KS36NKUA 1 852 360 85
Indoor Unit Outdoor Unit
CS-KS30NKU
CS-KS36NKU
CU-KS30NKUA
CU-KS36NKUA
IMPORTANT
These air conditioners employ new
refrigerant R410A.
Pay special attention when
servicing the unit.
REFERENCE NO. SM700875
NDITIONER
A
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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
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Warning If refrigerant gas blows off during the work, do not touch the refrigerant gas as it may cause frostbite. Prohibit 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." Prohibit When th
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Table of Contents Page SAFETY PRECAUTIONS .............................................................................................................. 2 TABLE OF CONTENTS ..................................................................................................................... 4 1. OPERATING RANGE ................................................................................................................... 6 2. SPECIFICATIONS 2-1. Unit Specifications ...................
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Page 9. CHECKING ELECTRICAL COMPONENTS 9-1. Measurement of Insulation Resistance ............................................................................... 46 9-2. Checking Continuity of Fuse on PCB Ass'y ......................................................................... 47 10. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT 10-1. Characteristics of New Refrigerant R410A ......................................................................... 48 10-2. Checklist before
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1. OPERATING RANGE Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp. Maximum 95 °F DB / 71 °F WB 115 °F DB Cooling Minimum 67 °F DB / 57 °F WB 0 °F DB 6
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2. SPECIFICATIONS 2-1. Unit Specifications Indoor Unit CS-KS30NKU Outdoor Unit CU-KS30NKUA < 230V > Voltage Rating 230V Single-Phase 60Hz Cooling Total Capacity BTU/h 30,600 ( 10,900 to 30,600 ) kW 9.0 ( 3.2 to 9.0 ) Sensible Capacity 18,600 BTU/h Latent Capacity BTU/h 12,000 3 3 Air Circulation (Hi/Me/Lo) ft /min (m /h) 630 (1,070) / 530 (901) /412 (700) Moisture Removal (High) Pints/h 9.57 Available Voltage Range V 187 to 253 Running Amperes A 16.5 ( 5.0 to 16.5 ) Power Input W 3,290 ( 1,00
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Indoor Unit CS-KS30NKU Outdoor Unit CU-KS30NKUA < 208V > Voltage Rating 208V Single-Phase 60Hz Cooling Total Capacity BTU/h 30,600 ( 10,900 to 30,600 ) kW 9.0 ( 3.2 to 9.0 ) Sensible Capacity 18,600 BTU/h Latent Capacity BTU/h 12,000 3 3 Air Circulation (Hi/Me/Lo) ft /min (m /h) 630 (1,070) / 530 (901) /412 (700) Moisture Removal (High) Pints/h 9.57 Available Voltage Range V 187 to 253 Running Amperes A 18.0 ( 5.0 to 18.0 ) Power Input W 3,290 ( 1,000 to 3,290 ) Power Factor % 88 EER BTU/h/W 9.
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Indoor Unit CS-KS36NKU Outdoor Unit CU-KS36NKUA < 230V > Voltage Rating 230V Single-Phase 60Hz Cooling Total Capacity BTU/h 34,000 ( 10,900 to 34,000 ) kW 10.0 ( 3.2 to 10.0 ) Sensible Capacity 20,700 BTU/h Latent Capacity BTU/h 13,300 3 3 Air Circulation (Hi/Me/Lo) ft /min (m /h) 630 (1,070) / 530 (901) /412 (700) Moisture Removal (High) Pints/h 10.64 Available Voltage Range V 187 to 253 Running Amperes A 20.0 ( 5.0 to 20.0 ) Power Input W 4,000 ( 1,000 to 4,000 ) Power Factor % 87 EER BTU/h/
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Indoor Unit CS-KS36NKU Outdoor Unit CU-KS36NKUA < 208V > Voltage Rating 208V Single-Phase 60Hz Cooling Total Capacity BTU/h 34,000 ( 10,900 to 34,000 ) kW 10.0 ( 3.2 to 10.0 ) Sensible Capacity 20,700 BTU/h Latent Capacity BTU/h 13,300 3 3 Air Circulation (Hi/Me/Lo) ft /min (m /h) 630 (1,070) / 530 (901) /412 (700) Moisture Removal (High) Pints/h 10.64 Available Voltage Range V 187 to 253 Running Amperes A 21.9 ( 5.0 to 21.9 ) Power Input W 4,000 ( 1,000 to 4,000 ) Power Factor % 88 EER BTU/h/
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2-2. Major Component Specifications 2-2-1. Indoor Unit Indoor Unit CS-KS30NKU Control PCB Part No. CB-CS-KS30NKU Controls Microprocessor Control Circuit Fuse 250V 3A Fan Type Cross-Flow Q'ty ... Dia. and Length inch (mm) 1 ... D3-15/16 / L32-1 (D100/L838) Fan Motor Type DC Motor Model ... Q'ty SIC-41CVJ-D847-1 ... 1 No. of Poles 8 Rough Measure RPM (Cool) 1,370 Nominal Output W 47 Coil Resistance Ohm - (Ambient Temp. 68 °F (20 °C)) Safety Device Type Internal Controller Over-Current Protecti
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Indoor Unit CS-KS36NKU Control PCB Part No. CB-CS-KS36NKU Controls Microprocessor Control Circuit Fuse 250V 3A Fan Type Cross-Flow Q'ty ... Dia. and Length inch (mm) 1 ... D3-15/16 / L32-1 (D100/L838) Fan Motor Type DC Motor Model ... Q'ty SIC-41CVJ-D847-1 ... 1 No. of Poles 8 Rough Measure RPM (Cool) 1,370 Nominal Output W 47 Coil Resistance Ohm - (Ambient Temp. 68 °F (20 °C)) Safety Device Type Internal Controller Over-Current Protection Yes Over-Heat Protection Yes Run Capacitor Micro F - V
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2-2-2. Outdoor Unit Outdoor Unit CU-KS30NKUA P.C.Board Control P.C.B Noise Filer P.C.B H.I.C.Board Part No. CR-C3082-F POW-CH3082-B2 HIC-CH3072R-C1 Controls Microprocessor - - Circuit Fuse 400V 3.15A 250V 25A - Compressor Type DC Twin Rotary (Hermetic) Compressor Model / Nominal Output C-9RVN273H0H / 2,250W Compressor Oil ... Amount Pints (cc) FV68S ... 2.98 (1,400) Coil Resistance (Ambient Temp. 77 °F (25 °C)) Ohm T - R : 0.169 T - S : 0.169 R - S : 0.169 Safety Device CT (Peak current c
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Outdoor Unit CU-KS36NKUA P.C.Board Control P.C.B Noise Filer P.C.B H.I.C.Board Part No. CR-C3682-F POW-CH3082-B2 HIC-CH3072R-C1 Controls Microprocessor - - Circuit Fuse 400V 3.15A 250V 25A - Compressor Type DC Twin Rotary (Hermetic) Compressor Model / Nominal Output C-9RVN273H0H / 2,500W Compressor Oil ... Amount Pints (cc) FV68S ... 2.98 (1,400) Coil Resistance (Ambient Temp. 77 °F (25 °C)) Ohm T - R : 0.169 T - S : 0.169 R - S : 0.169 Safety Device CT (Peak current cut-off control) Yes C
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2-3. Other Component Specifications Indoor Unit CS-KS30NKU CS-KS36NKU Outdoor Unit CU-KS30NKUA CU-KS36NKUA • Indoor heat exchanger sensor (Model:PTM-D51H-S6-1) • Indoor air temp sensor • Compressor temp sensor (Model:KTEC-35-135-1) (Model:TKS335B) 10 200 9 180 8 160 7 140 6 120 5 100 4 80 3 60 2 40 1 20 0 0 50 59 68 77 86 95 104 32 50 68 86 104 122 140 158 176 194 (10) (15) (20) (25) (30) (35) (40) (0) (10) (20) (30) (40) (50) (60) (70) (80) (90) Temperature °F (°C) Temperature °F (°C
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3. DIMENSIONAL DATA Indoor Unit CS-KS30NKU CS-KS36NKU Unit: inch(mm) (852-0-0010-196-00-0) 16 dia. 3-5/32 41-15/16 (1065) 2-3/32 25/32 1-27/32 1-3/32 2-3/8 Wide tube dia. 5/8" (15.88) 7-25/32 5-27/32 9-1/16 (230) (3/32) Narrow tube dia. 3/8" (9.52) 15-1/8 17-23/32 9-3/32 5-1/2 3-3/4 3-3/4 7-7/8 7/16 3-3/8 2-5/8 2-5/8 6-7/32 5-3/16 16-11/32 16-11/32 17-5/16 17-21/32 19-9/16 22-3/8 dia. 3-5/32 2-3/8 5/16 2-3/4 11-13/16 (300) 11-13/16 4-9/16 1-7/8 23/32 7-23/32 2-11/16 2-3/4 1-9/32 5-9/16 1-7/8
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Outdoor Unit CU-KS30NKUA CU-KS36NKUA 17 4-11/32 6-11/6 25-31/32 2-ID:1-1/4 holes (holes for drain) Of the 4-ID:1-1/4 holes, use 1 of 2 holes 2-15/16 4-1/8 8-5/8 2-15/16 2-3/8 specified for drain use to install the port. Use rubber plugs to seal the remaining 3 holes. 1/2 1/2 37-1/32 (940) Refrigerant tubing joint (Liquid tube) Flare connection dia.3/8" (9.52) Refrigerant tubing joint (Gas tube) Flare connection dia.5/8" (15.88) 3/4 2-3/8 2-3/8 1-3/16 2-5/32 7/16 3/4 Wiring outlet Wiring outle
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4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram Indoor Unit CS-KS30NKU Outdoor Unit CU-KS30NKUA CS-KS36NKU CU-KS36NKUA Indoor unit Outdoor unit Wide tube service Sub Main Wide tube valve Accumulator Accumulator Muffler O.D 5/8" High pressure (15.88 mm) switch H.P. Electric Narrow expansion tube valve service Narrow tube M valve Cooling cycle Strainer O.D. 3/8" (9.52 mm) 18 Heat exchanger Compressor Heat exchanger
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5. PERFORMANCE DATA 5-1. Temperature Charts Indoor Unit CS-KS30NKU Outdoor Unit CU-KS30NKUA Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) (1) Low pressure performance chart Lo fan Hi Fan 174 (1.2) 159 (1.1) 145 (1.0) 131 (0.9) 117 (0.8) 104 (0.7) -4 5 14 23 32 41 50 59 68 77 86 95 104 (-20) (-15) (-10) (-5) (0) (5) (10) (15) (20) (25) (30) (35) (40) Outdoor inlet air DB temp. °F(°C) (2) Operating current performance chart 28 Lo fan Hi Fan 26 24 22 20 18 16 14 12
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Indoor Unit CS-KS36NKU Outdoor Unit CU-KS36NKUA Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) (1) Low pressure performance chart Lo fan Hi Fan 174 (1.2) 159 (1.1) 145 (1.0) 131 (0.9) 117 (0.8) 104 (0.7) -4 5 14 23 32 41 50 59 68 77 86 95 104 (-20) (-15) (-10) (-5) (0) (5) (10) (15) (20) (25) (30) (35) (40) Outdoor inlet air DB temp. °F(°C) (2) Operating current performance chart 28 Lo fan Hi Fan 26 24 22 20 18 16 14 12 10 -4 5 14 23 32 41 50 59 68 77 86 95 104
