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TECHNICAL & SERVICE MANUAL
KHS0971 + CH0971
FILE NO.
KHS1271 + CH1271
Destination: North America
DC INVERTER SPLIT SYSTEM AIR CONDITIONER
Indoor Model No. Product Code No. Outdoor Model No. Product Code No.
KHS0971 1 852 099 79 CH0971 1 852 330 21
KHS1271 1 852 099 80 CH1271 1 852 330 22
Indoor Unit Outdoor Unit
KHS0971 CH0971
KHS1271 CH1271
IMPORTANT
These air conditioners employ new
refrigerant R410A.
Pay special attention when
servicing the unit.
REFERENCE NO. SM700647-06
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When Transporting Important! Be careful when picking up and moving the indoor and Please Read Before Starting outdoor units. Get a partner to help, and bend your knees This air conditioning system meets strict safety and operating when lifting to reduce strain on your back. Sharp edges or thin standards. As the installer or service person, it is an aluminum fins on the air conditioner can cut your fingers. important part of your job to install or service the system so it When Installing
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Table of Contents Page 1. OPERATING RANGE ................................................................................................................... 5 2. SPECIFICATIONS 2-1. Unit Specifications ............................................................................................................. 6 2-2. Major Component Specifications ....................................................................................... 8 2-3. Other Component Specifications ................
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Page 10. CHECKING ELECTRICAL COMPONENTS 10-1. Measurement of Insulation Resistance ............................................................................... 45 10-2. Checking Continuity of Fuse on PCB Ass'y ......................................................................... 46 11. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT 11-1. Characteristics of New Refrigerant R410A ......................................................................... 47 11-2. Checklist be
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1. OPERATING RANGE Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp. Maximum 95 °F D.B. / 71 °F W.B. 115 °F D.B. Cooling Minimum 67 °F D.B. / 57 °F W.B. 0 °F D.B. Maximum 80 °F D.B. / 67 °F W.B. 75 °F D.B. / 65 °F W.B. Heating _ _ Minimum D.B. / W.B. 0 °F D.B. 5
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2. SPECIFICATIONS 2-1. Unit Specifications Indoor Unit KHS0971 Outdoor Unit CH0971 Voltage Rating 115V Single-Phase 60Hz Cooling Heating Total Capacity BTU/h 9,000 ( 3,000 to 9,000 ) 12,200 ( 3,000 to 12,200 ) kW 2.65 ( 0.9 to 2.65 ) 3.6 ( 0.9 to 3.6 ) Sensible Capacity 7,650 - BTU/h Latent Capacity BTU/h 1,350 - 3 3 Air Circulation (High) ft /min (m /h) 282 (480) 312 (530) Moisture Removal (High) Pints/h 3.4 - Available Voltage Range V 104 to 126 Running Amperes A 7.6 ( 2.5 to 7.6 ) 10.3 ( 2
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Indoor Unit KHS1271 Outdoor Unit CH1271 Voltage Rating 115V Single-Phase 60Hz Cooling Heating Total Capacity BTU/h 11,900 ( 3,000 to 11,900 ) 14,300 ( 3,000 to 14,300 ) kW 3.5 ( 0.9 to 3.5 ) 4.2 ( 0.9 to 4.2 ) Sensible Capacity 9,100 - BTU/h Latent Capacity BTU/h 2,800 - 3 3 Air Circulation (High) ft /min (m /h) 294 (500) 312 (530) Moisture Removal (High) Pints/h 4.26 - Available Voltage Range V 104 to 126 Running Amperes A 10.9 ( 2.5 to 10.9 ) 11.7 ( 2.5 to 11.7 ) Power Input W 1,090 ( 250 to
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2-2. Major Component Specifications 2-2-1. Indoor Unit Indoor Unit KHS0971 Control PCB Part No. CB-KHS0971 Controls Microprocessor Control Circuit Fuse 250V 3A Remote Control Unit RCS-4HVPIS4U Fan Type Cross-Flow Q'ty ... Dia. and Length inch (mm) 1 ... D3-11/16 / L24-31/32 (D94/L634) Fan Motor Type AC Motor Model ... Q'ty IBH-884-076 ... 1 No. of Poles 4 Rough Measure RPM (Cool / Heat) 1,200 / 1,250 Nominal Output W 16 Coil Resistance Ohm BRN-WHT : 57.9 (Ambient Temp. 68 °F (20 °C)) RED-WHT
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Indoor Unit KHS1271 Control PCB Part No. CB-KHS1271 Controls Microprocessor Control Circuit Fuse 250V 3A Remote Control Unit RCS-4HVPIS4U Fan Type Cross-Flow Q'ty ... Dia. and Length inch (mm) 1 ... D3-11/16 / L24-31/32 (D94/L634) Fan Motor Type AC Motor Model ... Q'ty IBH-884-076 ... 1 No. of Poles 4 Rough Measure RPM (Cool / Heat) 1,250 / 1,250 Nominal Output W 16 Coil Resistance Ohm BRN-WHT : 57.9 (Ambient Temp. 68 °F (20 °C)) RED-WHT : 55.2 Safety Device Type Thermal Fuse Operating Temp. O
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2-2-2. Outdoor Unit Outdoor Unit CH0971 Control PCB Part No. CB-CH0971 Controls Microprocessor Control Circuit Fuse 125V 25A Compressor Type DC Rotary (Inverter) Compressor Model / Nominal Output G4C090LU1ER / 900W Compressor Oil ... Amount Pints (cc) FV50S ... 0.68 (320) Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm U - V : 0.81 V - W : 0.81 W - U : 0.81 Safety Device CT (Peak current cut-off control) Yes Compressor Discharge Temp. Control Yes Operation cut-off control in abnormal a
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Outdoor Unit CH1271 Control PCB Part No. CB-CH1271 Controls Microprocessor Control Circuit Fuse 125V 25A Compressor Type DC Rotary (Inverter) Compressor Model / Nominal Output G4C090LU1ER / 900W Compressor Oil ... Amount Pints (cc) FV50S ... 0.68 (320) Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm U - V : 0.81 V - W : 0.81 W - U : 0.81 Safety Device CT (Peak current cut-off control) Yes Compressor Discharge Temp. Control Yes Operation cut-off control in abnormal ambient Temp. Yes Ov
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2-3. Other Component Specifications Indoor Unit KHS0971 KHS1271 Outdoor Unit CH0971 CH1271 • Indoor heat exchanger sensor (Model:PTM-D51H-S3 TH1) • Indoor air temp sensor • Compressor temp sensor (Model:PTM-D51H-S3 TH2) (Model:DTN-TKS274Y TH2) 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 KHS0971 KHS1271 Unit: inch(mm) 13
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Outdoor Unit CH0971 CH1271 21-3/16 3-19/32 15/32 10-13/16 Wide tube service valve dia.3/8" (9.52) 28-11/32 (720) 2-1/8 Narrow tube service valve dia.1/4" (6.35) 6-3/32 Unit: inch(mm) 14 ID:23/32 4-ID:15/16 3-19/32 5/8 21-9/16 (548) 10-7/16 (265) 11-13/32 12-7/16 4-9/32 2-5/32
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4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram Indoor Unit KHS0971 Outdoor Unit CH0971 KHS1271 CH1271 Indoor unit Outdoor unit Accumulator Wide tube service Wide tube valve High pressure switch Muffler O.D. H.P. 3/8" (9.52 mm) 4-way valve Capillary tube for split flow Electric Narrow expansion tube valve service Narrow tube M valve Cooling cycle (Defrosting cycle) Muffler Strainer O.D. 1/4" Heating cycle (6.35 mm) Insulation of Refrigerant Tubing IMPORTANT Because capillary
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5. PERFORMANCE DATA 5-1. Temperature Charts Indoor Unit KHS0971 Outdoor Unit CH0971 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V) (1) Low pressure performance chart 173 (1.2) Lo fan Hi Fan 159 (1.1) 145 (1.0) 131 (0.9) 117 (0.8) -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 D.B. temp.°F(°C) (2) Operating current performance chart 9 Lo fan Hi Fan 8 7 6 5 4 -4 5 14 23 32 41 50 59 68 77
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Indoor Unit KHS0971 Outdoor Unit CH0971 Heating Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V) (1) High pressure performance chart 493 (3.4) 421 (2.9) 348 (2.4) 276 (1.9) 23 32 41 50 59 68 77 (-5) (0) (5) (10) (15) (20) (25) Outdoor inlet air D.B. temp.°F(°C) (2) Operating current performance chart 14 13 12 11 10 9 8 7 23 32 41 50 59 68 77 (-5) (0) (5) (10) (15) (20) (25) Outdoor inlet air D.B. temp.°F(°C) (3) Indoor discharge air performance chart 140(60) 131(55) 12
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Indoor Unit KHS1271 Outdoor Unit CH1271 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V) (1) Low pressure performance chart 173 (1.2) Lo fan Hi Fan 159 (1.1) 145 (1.0) 131 (0.9) 117 (0.8) -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 D.B. temp.°F(°C) (2) Operating current performance chart 13 12 Lo fan Hi Fan 11 10 9 8 7 6 5 4 -4 5 14 23 32 41 50 59 68 77 86 95 104 (-20) (-15) (-10) (-
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Indoor Unit KHS1271 Outdoor Unit CH1271 Heating Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V) (1) High pressure performance chart 493 (3.4) 421 (2.9) 348 (2.4) 276 (1.9) 23 32 41 50 59 68 77 (-5) (0) (5) (10) (15) (20) (25) Outdoor inlet air D.B. temp. °F(°C) (2) Operating current performance chart 15 14 13 12 11 10 9 8 23 32 41 50 59 68 77 (-5) (0) (5) (10) (15) (20) (25) Outdoor inlet air D.B. temp. °F(°C) (3) Indoor discharge air performance chart 140(60) 131(55)
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5-2. Cooling Capacity Indoor Unit : KHS0971 Outdoor Unit : CH0971 Power Supply : 115V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: 9,000 BTU/h AIR FLOW RATE: 282 CFM INDOOR OUTDOOR o o o o ENT. TEMP. F ( C) AMBIENT TEMP. F ( C) W.B. D.B. 65 75 85 95 105 115 (18.3) (23.9) (29.4) (35.0) (40.6) (46.1) TC 9,080 8,800 8,500 8,260 7,890 6,400 72 (22.2) SHC 6,870 6,760 6,590 6,480 6,320 5,610 59 76 (24.4) SHC 7,860 7,690 7,580 7,470 7,250 6,400 (15.0) 80 (26.7) SHC 8,840 8,730
