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TECHNICAL & SERVICE MANUAL
INDOOR UNIT : CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
CS-MKS18NKU
CS-MKS24NKU
DC INVERTER MULTI-SYSTEM AIR CONDITIONER
Capacity Indoor Model No. Product Code No.
7,500BTU / h CS-MKS7NKU 1 852 360 94
9,000BTU / h CS-MKS9NKU 1 852 360 95
11,900BTU / h CS-MKS12NKU 1 852 360 96
17,500BTU / h CS-MKS18NKU 1 852 360 97
24,200BTU / h CS-MKS24NKU 1 852 360 98
Wall Mounted Type Indoor Unit
< Applicable Multi-Outdoor Units >
CU-3KS19NBU (3-room multi unit)
CU-4KS24NBU (4-room multi uni
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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 .................................................................................... APPLICABLE MULTI-OUTDOOR UNITS 5 ...................................................................................
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APPLICABLE MULTI-OUTDOOR UNITS Multi-Outdoor Unit 3-Room 4-Room 4-Room CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU Indoor Unit CS-MKS7NKU YES YES YES CS-MKS9NKU YES YES YES CS-MKS12NKU YES YES YES CS-MKS18NKU YES YES YES CS-MKS24NKU NO YES YES 5
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1. OPERATING RANGE Combination with cooling outdoor unit CU-3KS19NBU, CU-4KS24NBU or CU-4KS31NBU 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 14 °F DB 6
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2. SPECIFICATIONS 2-1. Unit Specifications Indoor Unit CS-MKS7NKU < 230V > Type Wall Mounted Type Indoor Unit Voltage Rating 230V Single-Phase 60Hz Performance Cooling Capacity BTU/h 7,500 kW 2.20 3 3 Air Circulation (Hi/Me/Lo) 241 (410) / 224 (381) / 212 (360) ft /min (m /h) Moisture Removal (High) Pints/h 2.77 Electrical Rating Cooling Available Voltage Range V 187 to 253 Running Amperes A 0.11 Power Input W 25 Features Control / Temperature Control Microprocessor / I.C. Thermistor Control
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Indoor Unit CS-MKS7NKU < 208V > Type Wall Mounted Type Indoor Unit Voltage Rating 208V Single-Phase 60Hz Performance Cooling Capacity BTU/h 7,500 kW 2.20 3 3 Air Circulation (Hi/Me/Lo) 241 (410) / 224 (381) / 212 (360) ft /min (m /h) Moisture Removal (High) Pints/h 2.77 Electrical Rating Cooling Available Voltage Range V 187 to 253 Running Amperes A 0.12 Power Input W 25 Features Control / Temperature Control Microprocessor / I.C. Thermistor Control Unit Wireless Remote Control Unit Timer 24-Ho
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Indoor Unit CS-MKS9NKU < 230V > Type Wall Mounted Type Indoor Unit Voltage Rating 230V Single-Phase 60Hz Performance Cooling Capacity BTU/h 9,000 kW 2.65 3 3 Air Circulation (Hi/Me/Lo) 259 (440) / 241 (410) / 212 (360) ft /min (m /h) Moisture Removal (High) Pints/h 3.4 Electrical Rating Cooling Available Voltage Range V 187 to 253 Running Amperes A 0.15 Power Input W 35 Features Control / Temperature Control Microprocessor / I.C. Thermistor Control Unit Wireless Remote Control Unit Timer 24-Ho
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Indoor Unit CS-MKS9NKU < 208V > Type Wall Mounted Type Indoor Unit Voltage Rating 208V Single-Phase 60Hz Performance Cooling Capacity BTU/h 9,000 kW 2.65 3 3 Air Circulation (Hi/Me/Lo) 259 (440) / 241 (410) / 212 (360) ft /min (m /h) Moisture Removal (High) Pints/h 3.4 Electrical Rating Cooling Available Voltage Range V 187 to 253 Running Amperes A 0.17 Power Input W 35 Features Control / Temperature Control Microprocessor / I.C. Thermistor Control Unit Wireless Remote Control Unit Timer 24-Ho
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Indoor Unit CS-MKS12NKU < 230V > Type Wall Mounted Type Indoor Unit Voltage Rating 230V Single-Phase 60Hz Performance Cooling Capacity BTU/h 11,900 kW 3.50 3 3 Air Circulation (Hi/Me/Lo) 282 (479) / 259 (440) / 218 (370) ft /min (m /h) Moisture Removal (High) Pints/h 4.26 Electrical Rating Cooling Available Voltage Range V 187 to 253 Running Amperes A 0.15 Power Input W 35 Features Control / Temperature Control Microprocessor / I.C. Thermistor Control Unit Wireless Remote Control Unit Timer 24
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Indoor Unit CS-MKS12NKU < 208V > Type Wall Mounted Type Indoor Unit Voltage Rating 208V Single-Phase 60Hz Performance Cooling Capacity BTU/h 11,900 kW 3.50 3 3 Air Circulation (Hi/Me/Lo) 282 (479) / 259 (440) / 218 (370) ft /min (m /h) Moisture Removal (High) Pints/h 4.26 Electrical Rating Cooling Available Voltage Range V 187 to 253 Running Amperes A 0.17 Power Input W 35 Features Control / Temperature Control Microprocessor / I.C. Thermistor Control Unit Wireless Remote Control Unit Timer 24
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Indoor Unit CS-MKS18NKU < 230V > Type Wall Mounted Type Indoor Unit Voltage Rating 230V Single-Phase 60Hz Performance Cooling Capacity BTU/h 17,500 kW 5.15 3 3 Air Circulation (Hi/Me/Lo) 500 (850) / 447 (760) / 377 (641) ft /min (m /h) Moisture Removal (High) Pints/h 4.89 Electrical Rating Cooling Available Voltage Range V 187 to 253 Running Amperes A 0.15 Power Input W 35 Features Control / Temperature Control Microprocessor / I.C. Thermistor Control Unit Wireless Remote Control Unit Timer 24
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Indoor Unit CS-MKS18NKU < 208V > Type Wall Mounted Type Indoor Unit Voltage Rating 208V Single-Phase 60Hz Performance Cooling Capacity BTU/h 17,500 kW 5.15 3 3 Air Circulation (Hi/Me/Lo) 500 (850) / 447 (760) / 377 (641) ft /min (m /h) Moisture Removal (High) Pints/h 4.89 Electrical Rating Cooling Available Voltage Range V 187 to 253 Running Amperes A 0.17 Power Input W 35 Features Control / Temperature Control Microprocessor / I.C. Thermistor Control Unit Wireless Remote Control Unit Timer 24
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Indoor Unit CS-MKS24NKU < 230V > Type Wall Mounted Type Indoor Unit Voltage Rating 230V Single-Phase 60Hz Performance Cooling Capacity BTU/h 24,200 kW 7.10 3 3 Air Circulation (Hi/Me/Lo) 541 (919) / 500 (850) / 435 (739) ft /min (m /h) Moisture Removal (High) Pints/h 4.89 Electrical Rating Cooling Available Voltage Range V 187 to 253 Running Amperes A 0.20 Power Input W 45 Features Control / Temperature Control Microprocessor / I.C. Thermistor Control Unit Wireless Remote Control Unit Timer 24
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Indoor Unit CS-MKS24NKU < 208V > Type Wall Mounted Type Indoor Unit Voltage Rating 208V Single-Phase 60Hz Performance Cooling Capacity BTU/h 24,200 kW 7.10 3 3 Air Circulation (Hi/Me/Lo) 541 (919) / 500 (850) / 435 (739) ft /min (m /h) Moisture Removal (High) Pints/h 4.89 Electrical Rating Cooling Available Voltage Range V 187 to 253 Running Amperes A 0.22 Power Input W 45 Features Control / Temperature Control Microprocessor / I.C. Thermistor Control Unit Wireless Remote Control Unit Timer 24
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2-2. Major Component Specifications 2-2-1. Indoor Unit Indoor Unit CS-MKS7NKU Control PCB Part No. CB-CU-MKS7NKU Controls Microprocessor Control Circuit Fuse 250V 3A Fan Type Cross-Flow Q'ty ... Dia. and Length inch (mm) 1 ... D3-5/8 / L24-31/32 (D92 / L634) Fan Motor Type DC Motor Model ... Q'ty SIC-41CVJ-D847-4 ... 1 No. of Poles 8 Rough Measure RPM (Cool) 1,050 Nominal Output W 47 Coil Resistance Ohm - (Ambient Temp. 68 °F (20 °C)) Safety Device Type Internal Controller Over- Current Prot
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Indoor Unit CS-MKS9NKU Control PCB Part No. CB-CU-MKS9NKU Controls Microprocessor Control Circuit Fuse 250V 3A Fan Type Cross-Flow Q'ty ... Dia. and Length inch (mm) 1 ... D3-5/8 / L24-31/32 (D92 / L634) Fan Motor Type DC Motor Model ... Q'ty SIC-41CVJ-D847-4 ... 1 No. of Poles 8 Rough Measure RPM (Cool) 1,100 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 Micr
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Indoor Unit CS-MKS12NKU Control PCB Part No. CB-CU-MKS12NKU Controls Microprocessor Control Circuit Fuse 250V 3A Fan Type Cross-Flow Q'ty ... Dia. and Length inch (mm) 1 ... D3-5/8 / L24-31/32 (D92 / L634) Fan Motor Type DC Motor Model ... Q'ty SIC-41CVJ-D847-4 ... 1 No. of Poles 8 Rough Measure RPM (Cool) 1,200 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 Mic
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Indoor Unit CS-MKS18NKU Control PCB Part No. CB-CU-MKS18NKU Controls Microprocessor Control Circuit Fuse 250V 3A Fan Type Cross-Flow Q'ty ... Dia. and Length inch (mm) 1 ... D3-5/8 / L33-9/32 (D92 / L845) Fan Motor Type DC Motor Model ... Q'ty SIC-41CVJ-D847-3 ... 1 No. of Poles 8 Rough Measure RPM (Cool) 1,200 Nominal Output W 30 Coil Resistance Ohm - (Ambient Temp. 68 °F (20 °C)) Safety Device Type Internal Controller Over- Current Protection Yes Over-Heat Protection Yes Run Capacitor Micr
