DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Transcription

1 AIR CONDITIONER TECHNICAL & SERVICE MANUAL CS-KS30NKU + CU-KS30NKUA CS-KS36NKU + CU-KS36NKUA DC INVERTER SPLIT SYSTEM AIR CONDITIONER Indoor Model No. CS-KS30NKU CS-KS36NKU Product Code No Outdoor Model No. CU-KS30NKUA CU-KS36NKUA Product Code No Indoor Unit Outdoor Unit CS-KS30NKU CS-KS36NKU CU-KS30NKUA CU-KS36NKUA IMPORTANT These air conditioners employ new refrigerant R40A. Pay special attention when servicing the unit. REFERENCE NO. SM700875

2 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. Prohibit Prohibit Prohibit 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

3 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." 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. Prohibit 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 Do not wash the air conditioner with water, as this may cause an electric shock or fire. Prohibit 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. Prohibit 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 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

4 Table of Contents SAFETY PRECAUTIONS... Page 2 TABLE OF CONTENTS. OPERATING RANGE SPECIFICATIONS 2-. Unit Specifications Major Component Specifications Other Component Specifications DIMENSIONAL DATA REFRIGERANT FLOW DIAGRAM 4-. Refrigerant Flow Diagram PERFORMANCE DATA 5-. Temperature Charts Cooling Capacity Cooling Capacity (Low Ambient) Air Throw Distance Charts ELECTRICAL DATA 6-. Electrical Characteristics 6-2. Electric Wiring Diagrams 7. FUNCTIONS 7-. Operation Functions 7-2. Protective Functions TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) 8-. Precautions before Performing Inspection or Repair Method of Self-Diagnostics Checking the Indoor and Outdoor Units Trouble Diagnosis of Fan Motor Noise Malfunction and Electromagnetic Interference

5 Page 9. CHECKING ELECTRICAL COMPONENTS 9-. Measurement of Insulation Resistance Checking Continuity of Fuse on PCB Ass'y REFRIGERANT R40A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT 0-. Characteristics of New Refrigerant R40A Checklist before Servicing Tools Specifically for R40A Tubing Installation Procedures In Case of Compressor Malfunction In Case Refrigerant is Leaking Charging Additional Refrigerant Retro-Fitting Existing Systems APPENDIX A Operating Instructions... A- APPENDIX B INSTALLAION INSTRUCTIONS... A-2 5

6 . OPERATING RANGE Cooling Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp. Maximum 95 F DB / 7 F WB 5 F DB Minimum 67 F DB / 57 F WB 0 F DB 6

7 2. SPECIFICATIONS 2-. Unit Specifications Indoor Unit Outdoor Unit Performance Electrical Rating Features Dimensions & Weight Voltage Rating CS-KS30NKU CU-KS30NKUA Total Capacity BTU/h kw 30, ( 0,900 to 30,600 ) ( 3.2 to 9.0 ) Sensible Capacity BTU/h 8,600 Latent Capacity BTU/h 2,000 Air Circulation (Hi/Me/Lo) ft 3 /min (m 3 /h) 630 (,070) / 530 (90) /42 (700) Moisture Removal (High) Pints/h 9.57 Available Voltage Range V 87 to 253 Running Amperes Power Input A W 6.5 3,290 ( 5.0 to 6.5 ) (,000 to 3,290 ) Power Factor % 87 EER BTU/h/W 9.30 SEER BTU/Wh 6.0 Compressor Locked Rotor Amperes A 3.0 Fuse or Circuit Breaker Capacity A 35 Controls / Temperature Control Microprocessor / I.C. Thermister Control Unit Wireless Remote Control Unit Timer 24-Hour ON or OFF Timer, -Hour OFF Timer Fan Speeds Indoor / Outdoor Auto and 3 steps / Auto (Hi, Me, Lo) Airflow Direction (Indoor) Horizontal Manual Air Filter Compressor Vertical Auto Washable, Anti-Mold DC Twin Rotary (Inverter) Refrigerant / Amount charged at shipment Ibs (g) R40A / 6.5 (2,950) Refrigerant Control Electric Expansion Valve Operation Sound (*Qt = Quiet mode) Indoor : Hi/Me/Lo/Qt* Outdoor : Hi db-a db-a 49 / 44 / 39 / Refrigerant Tubing Connections Flare Type Max. allowable tubing length at shipment ft (m) 64 (50) Refrigerant Narrow tube inch (mm) 3/8 (9.52) Tube Diameter Wide tube inch (mm) 5/8 (5.88) Refrigerant Tube Kit Optional Unit Dimensions Height Width Depth Package Dimensions Height Width Depth Weight Net Shipping Shipping Volume inch (mm) inch (mm) Ibs (kg) Ibs (kg) cu.ft (m 3 ) Remarks: Rating conditions are: Cooling: Indoor air temperature 80 F DB / 67 F WB Outdoor air temperature 95 F DB / 75 F WB Indoor Unit 2-7/ /8 4-3/32 (30,40 380) 32.0 (4.5) 39.7 (8.0) 4.59 (0.3) 230V Single-Phase 60Hz Cooling Outdoor Unit < 230V > -3/6 4-5/6 9-/6 35-3/6 37-/32 3-3/8 (300, ) ( ) 42-3/ /8 (,076,06 46) 83.0 (83.0) (93.0) 5.88 (0.45) DATA SUBJECT TO CHANGE WITHOUT NOTICE. 7

8 Indoor Unit Outdoor Unit Performance Electrical Rating Features Dimensions & Weight Voltage Rating CS-KS30NKU CU-KS30NKUA Total Capacity BTU/h kw Sensible Capacity BTU/h Latent Capacity BTU/h Air Circulation (Hi/Me/Lo) ft 3 /min (m 3 /h) Moisture Removal (High) Pints/h Available Voltage Range V Running Amperes A Power Input W Power Factor % EER BTU/h/W SEER BTU/Wh Compressor Locked Rotor Amperes A Fuse or Circuit Breaker Capacity A Controls / Temperature Control Control Unit Timer Fan Speeds Indoor / Outdoor Airflow Direction (Indoor) Horizontal Vertical Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (*Qt = Quiet mode) Indoor : Hi/Me/Lo/Qt* Outdoor : Hi db-a db-a Refrigerant Tubing Connections Max. allowable tubing length at shipment ft (m) Refrigerant Narrow tube inch (mm) Tube Diameter Wide tube inch (mm) Refrigerant Tube Kit Unit Dimensions Height Width Depth Package Dimensions Height Width Depth Weight Net Shipping Shipping Volume inch (mm) inch (mm) Ibs (kg) Ibs (kg) cu.ft (m 3 ) 208V Single-Phase 60Hz 30,600 ( 0,900 to 30,600 ) 9.0 ( 3.2 to 9.0 ) 8,600 2, (,070) / 530 (90) /42 (700) 8.0 3,290 Indoor Unit 2-7/ /8 4-3/32 (30,40 380) 32.0 (4.5) 39.7 (8.0) 4.59 (0.3) Cooling to 253 ( 5.0 to 8.0 ) (,000 to 3,290 ) Microprocessor / I.C. Thermister Wireless Remote Control Unit 24-Hour ON or OFF Timer, -Hour OFF Timer Auto and 3 steps / Auto (Hi, Me, Lo) Manual Auto Washable, Anti-Mold DC Twin Rotary (Inverter) R40A / 6.5 (2,950) Electric Expansion Valve 49 / 44 / 39 / Flare Type 64 (50) 3/8 (9.52) 5/8 (5.88) Optional Outdoor Unit < 208V > -3/6 4-5/6 9-/6 35-3/6 37-/32 3-3/8 (300, ) ( ) 42-3/ /8 (,076,06 46) 83.0 (83.0) (93.0) 5.88 (0.45) DATA SUBJECT TO CHANGE WITHOUT NOTICE. Remarks: Rating conditions are: Cooling: Indoor air temperature 80 F DB / 67 F WB Outdoor air temperature 95 F DB / 75 F WB 8

9 Indoor Unit Outdoor Unit Performance Electrical Rating Features Dimensions & Weight Voltage Rating CS-KS36NKU CU-KS36NKUA Total Capacity BTU/h kw Sensible Capacity BTU/h Latent Capacity BTU/h Air Circulation (Hi/Me/Lo) ft 3 /min (m 3 /h) Moisture Removal (High) Pints/h Available Voltage Range V Running Amperes A Power Input W Power Factor % EER BTU/h/W SEER BTU/Wh Compressor Locked Rotor Amperes A Fuse or Circuit Breaker Capacity A Controls / Temperature Control Control Unit Timer Fan Speeds Indoor / Outdoor Airflow Direction (Indoor) Horizontal Vertical Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (*Qt = Quiet mode) Indoor : Hi/Me/Lo/Qt* Outdoor : Hi db-a db-a Refrigerant Tubing Connections Max. allowable tubing length at shipment ft (m) Refrigerant Narrow tube inch (mm) Tube Diameter Wide tube inch (mm) Refrigerant Tube Kit Unit Dimensions Height Width Depth Package Dimensions Height Width Depth Weight Net Shipping Shipping Volume inch (mm) inch (mm) Ibs (kg) Ibs (kg) cu.ft (m 3 ) 230V Single-Phase 60Hz 34,000 ( 0,900 to 34,000 ) 0.0 ( 3.2 to 0.0 ) 20,700 3, (,070) / 530 (90) /42 (700) ,000 Indoor Unit 2-7/ /8 4-3/32 (30,40 380) 32.0 (4.5) 39.7 (8.0) 4.59 (0.3) Cooling to 253 ( 5.0 to 20.0 ) (,000 to 4,000 ) Microprocessor / I.C. Thermister Wireless Remote Control Unit 24-Hour ON or OFF Timer, -Hour OFF Timer Auto and 3 steps / Auto (Hi, Me, Lo) Manual Auto Washable, Anti-Mold DC Twin Rotary (Inverter) R40A / 6.5 (2,950) Electric Expansion Valve 49 / 44 / 39 / Flare Type 64 (50) 3/8 (9.52) 5/8 (5.88) Optional Outdoor Unit < 230V > -3/6 4-5/6 9-/6 35-3/6 37-/32 3-3/8 (300, ) ( ) 42-3/ /8 (,076,06 46) 83.0 (83.0) (93.0) 5.88 (0.45) DATA SUBJECT TO CHANGE WITHOUT NOTICE. Remarks: Rating conditions are: Cooling: Indoor air temperature 80 F DB / 67 F WB Outdoor air temperature 95 F DB / 75 F WB 9

10 Indoor Unit Outdoor Unit Performance Electrical Rating Features Dimensions & Weight Voltage Rating CS-KS36NKU CU-KS36NKUA Total Capacity BTU/h kw Sensible Capacity BTU/h Latent Capacity BTU/h Air Circulation (Hi/Me/Lo) ft 3 /min (m 3 /h) Moisture Removal (High) Pints/h Available Voltage Range V Running Amperes A Power Input W Power Factor % EER BTU/h/W SEER BTU/Wh Compressor Locked Rotor Amperes A Fuse or Circuit Breaker Capacity A Controls / Temperature Control Control Unit Timer Fan Speeds Indoor / Outdoor Airflow Direction (Indoor) Horizontal Vertical Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound (*Qt = Quiet mode) Indoor : Hi/Me/Lo/Qt* Outdoor : Hi db-a db-a Refrigerant Tubing Connections Max. allowable tubing length at shipment ft (m) Refrigerant Narrow tube inch (mm) Tube Diameter Wide tube inch (mm) Refrigerant Tube Kit Unit Dimensions Height Width Depth Package Dimensions Height Width Depth Weight Net Shipping Shipping Volume inch (mm) inch (mm) Ibs (kg) Ibs (kg) cu.ft (m 3 ) 208V Single-Phase 60Hz 34, ,000 Indoor Unit 2-7/ /8 4-3/32 (30,40 380) 32.0 (4.5) 39.7 (8.0) 4.59 (0.3) Cooling ( 0,900 to 34,000 ) ( 3.2 to 0.0 ) 20,700 3, (,070) / 530 (90) /42 (700) to 253 ( 5.0 to 2.9 ) (,000 to 4,000 ) Microprocessor / I.C. Thermister Wireless Remote Control Unit 24-Hour ON or OFF Timer, -Hour OFF Timer Auto and 3 steps / Auto (Hi, Me, Lo) Manual Auto Washable, Anti-Mold DC Twin Rotary (Inverter) R40A / 6.5 (2,950) Electric Expansion Valve 49 / 44 / 39 / Flare Type 64 (50) 3/8 (9.52) 5/8 (5.88) Optional Outdoor Unit < 208V > -3/6 4-5/6 9-/6 35-3/6 37-/32 3-3/8 (300, ) ( ) 42-3/ /8 (,076,06 46) 83.0 (83.0) (93.0) 5.88 (0.45) DATA SUBJECT TO CHANGE WITHOUT NOTICE. Remarks: Rating conditions are: Cooling: Indoor air temperature 80 F DB / 67 F WB Outdoor air temperature 95 F DB / 75 F WB 0

11 2-2. Major Component Specifications Indoor Unit Indoor Unit CS-KS30NKU Control PCB Part No. Controls Control Circuit Fuse CB-CS-KS30NKU Microprocessor 250V 3A Fan Type Q'ty... Dia. and Length inch (mm) Cross-Flow... D3-5/6 / L32- (D00/L838) 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 Flap Motor Type Model Rating Coil Resistance (Ambient Temp. 77 F (25 C)) Heat Exchanger Coil Coil Rows Fins Per inch Face Area W Ohm Micro F VAC Ohm ft 2 (m 2 ) DC Motor SIC-4CVJ-D , Internal Controller Yes Yes - - Stepping Motor 24BYJ DC 2V Each Pair of Terminal : 200 +/- 7% Aluminum Plate Fin / Copper Tube and (0.423) DATA SUBJECT TO CHANGE WITHOUT NOTICE.

12 Indoor Unit CS-KS36NKU Control PCB Part No. Controls Control Circuit Fuse CB-CS-KS36NKU Microprocessor 250V 3A Fan Type Q'ty... Dia. and Length inch (mm) Cross-Flow... D3-5/6 / L32- (D00/L838) 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 Flap Motor Type Model Rating Coil Resistance (Ambient Temp. 77 F (25 C)) Heat Exchanger Coil Coil Rows Fins Per inch Face Area W Ohm Micro F VAC Ohm ft 2 (m 2 ) DC Motor SIC-4CVJ-D , Internal Controller Yes Yes - - Stepping Motor 24BYJ DC 2V Each Pair of Terminal : 200 +/- 7% Aluminum Plate Fin / Copper Tube and (0.423) DATA SUBJECT TO CHANGE WITHOUT NOTICE. 2

13 Outdoor Unit Outdoor Unit CU-KS30NKUA P.C.Board Part No. Controls Circuit Fuse Control P.C.B CR-C3082-F Microprocessor 400V 3.5A Noise Filer P.C.B POW-CH3082-B2-250V 25A H.I.C.Board HIC-CH3072R-C - - Compressor Type Compressor Model / Nominal Output Compressor Oil... Amount Pints (cc) Coil Resistance (Ambient Temp. 77 F (25 C)) Ohm Safety Device CT (Peak current cut-off control) Compressor Discharge Temp. Control Operation cut-off control in abnormal ambient Temp. Overload Relay Model Operation Temp. Run Capacitor Crankcase Heater Micro F VAC DC Twin Rotary (Hermetic) C-9RVN273H0H / 2,250W FV68S (,400) T - R : 0.69 T - S : 0.69 R - S : 0.69 Yes Yes Yes CS-7L0 Open : 230 F (0 C), Close : 203 F (95 C) V 30W Fan Type Q'ty... Dia. inch (mm) Propeller... D9-9/32 (D490) 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 W Ohm Micro F VAC DC Motor SIC-7FW-D820-4A Internal Controller Yes Yes - - Heat Exchanger Coil Coil Rows Fins per inch Aluminum Plate Fin / Copper Tube Face Area ft 2 (m 2 ) 8.05 (0.748) External Finish Acrylic baked-on enamel finish DATA SUBJECT TO CHANGE WITHOUT NOTICE. 3

14 Outdoor Unit CU-KS36NKUA P.C.Board Part No. Controls Circuit Fuse Control P.C.B CR-C3682-F Microprocessor 400V 3.5A Noise Filer P.C.B POW-CH3082-B2-250V 25A H.I.C.Board HIC-CH3072R-C - - Compressor Type Compressor Model / Nominal Output Compressor Oil... Amount Pints (cc) Coil Resistance (Ambient Temp. 77 F (25 C)) Ohm Safety Device CT (Peak current cut-off control) Compressor Discharge Temp. Control Operation cut-off control in abnormal ambient Temp. Overload Relay Model Operation Temp. Run Capacitor Crankcase Heater Micro F VAC DC Twin Rotary (Hermetic) C-9RVN273H0H / 2,500W FV68S (,400) T - R : 0.69 T - S : 0.69 R - S : 0.69 Yes Yes Yes CS-7L0 Open : 230 F (0 C), Close : 203 F (95 C) V 30W Fan Type Q'ty... Dia. inch (mm) Propeller... D9-9/32 (D490) 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 W Ohm Micro F VAC DC Motor SIC-7FW-D820-4A Internal Controller Yes Yes - - Heat Exchanger Coil Coil Rows Fins per inch Aluminum Plate Fin / Copper Tube Face Area ft 2 (m 2 ) 8.05 (0.748) External Finish Acrylic baked-on enamel finish DATA SUBJECT TO CHANGE WITHOUT NOTICE. 4

15 2-3. Other Component Specifications Indoor Unit CS-KS30NKU CS-KS36NKU Outdoor Unit CU-KS30NKUA CU-KS36NKUA Indoor air temp sensor (Model:KTEC ) Indoor heat exchanger sensor (Model:PTM-D5H-S6-) Compressor temp sensor (Model:TKS335B) Resistance (k ohm) (0) (5) (20) (25) (30) (35) (40) Temperature F ( C) Resistance (k ohm) (0) (0) (20) (30) (40) (50) (60) (70) (80) (90) Temperature F ( C) Outdoor air temp sensor (Model:TKS295B) Outdoor heat exchanger sensor (Model:TKS334B) Heat sink temp sensor (HIC Board) (Model:TKS36B) 40 Resistance (k ohm) (-20)(-5)(-0) (-5) (0) (5) (0) (5) (20) Temperature F ( C) 5

16 3. DIMENSIONAL DATA Indoor Unit CS-KS30NKU CS-KS36NKU 4-9/6-5/32 dia. 3-5/32 4-5/6 (065) 9-/6 (230) (3/32) 2-3/32 25/32-27/32-3/ /32 Wide tube dia. 5/8" (5.88) 5-27/32 Narrow tube dia. 3/8" (9.52) 5-/2 5-/8 7-23/32 9-3/32 3-3/4 3-3/4 7-7/8 2-/6 6-7/32 6-/32 7-5/6 9-9/6 5-3/6 6-/32 7-2/ /8 dia. 3-5/32-3/6 5/6 2-3/4-3/6 (300) -7/8 23/32 4-9/6-7/8 7-23/32 2-3/4 5-9/6-9/32 2-3/8 2-3/8 2-5/8 3-3/8 7/6 2-5/8 Unit: inch(mm) ( ) 6

17 Outdoor Unit CU-KS30NKUA CU-KS36NKUA -3/6 7/6 2-5/32 Unit: inch(mm) ( ) 3-9/32 4-/32 4-/ /32-5/6-27/32-3/6 6-23/32 9/32 4-3/4 3/32 2/32 6-/6 25-3/32 4-/32 4-/8 8-5/8 2-5/6 2-5/6 2-3/8 /2 /2 37-/32 (940) 3/4 2-3/8 2-ID:-/4 holes (holes for drain) Of the 4-ID:-/4 holes, use of 2 holes specified for drain use to install the port. Use rubber plugs to seal the remaining 3 holes. Refrigerant tubing joint (Liquid tube) Flare connection dia.3/8" (9.52) Refrigerant tubing joint (Gas tube) Flare connection dia.5/8" (5.88) 2-3/8 3-3/8 2-7/32 3/4 Wiring outlet (knock-out holes dia.-3/8, -3/32, 7/8, /2) 2-25/32-5/6 4-/32-27/32-3/6 Wiring outlet (knock-out holes dia.-3/8, -3/32, 7/8, /2) 2-5/32 2-7/32-3/32 -/ /6 (90) 23/32 3/32 3-3/8 (340) 4-3/32 6-5/32 7

18 4. REFRIGERANT FLOW DIAGRAM 4-. Refrigerant Flow Diagram Indoor Unit CS-KS30NKU CS-KS36NKU Outdoor Unit CU-KS30NKUA CU-KS36NKUA Indoor unit Outdoor unit Wide tube O.D 5/8" (5.88 mm) Wide tube service valve Muffler Sub Accumulator Main Accumulator High pressure switch H.P. Heat exchanger Heat exchanger Compressor Narrow tube Narrow tube service valve Electric expansion valve M Cooling cycle O.D. 3/8" (9.52 mm) Strainer 8

19 5. PERFORMANCE DATA 5-. Temperature Charts Indoor Unit CS-KS30NKU Outdoor Unit CU-KS30NKUA Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) () Low pressure performance chart Indoor discharge air temperature F( C) Low pressure at wide tube service valve Operating current (A) psig(mpag) 74 (.2) 59 (.) 45 (.0) 3 (0.9) 7 (0.8) 04 (0.7) -4 (-20) 5 (-5) 4 (-0) 23 (-5) (2) Operating current performance chart (-20) 5 (-5) 4 (-0) 23 (-5) (3) Indoor discharge air performance chart 64.4 (8) 60.8 (6) 57.2 (4) 53.6 (2) 50.0 (0) 46.4 (8) 42.8 (6) 32 (0) 32 (0) 4 (5) 50 (0) 59 (5) Outdoor inlet air DB temp. F( C) (5) (0) (5) Outdoor inlet air DB temp. F( C) 68 (20) 68 (20) Lo fan Indoor Air Temp.86 F (30 C) Lo fan Lo fan 80 F (27 C) 75 F (24 C) 77 (25) 77 (25) 86 (30) Indoor Air Temp.86 F (30 C) 80 F (27 C) 75 F (24 C) Indoor Air Temp.86 F (30 C) 80 F (27 C) 80 F (27 C) 75 F (24 C) 75 F (24 C) 86 (30) Hi Fan Hi Fan Hi Fan 95 (35) 95 (35) 04 (40) 04 (40) -4 (-20) 5 (-5) 4 (-0) 23 (-5) 32 (0) (5) (0) (5) Outdoor inlet air DB temp. F( C) 68 (20) 77 (25) 86 (30) 95 (35) 04 (40) NOTE Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. 9

20 Indoor Unit CS-KS36NKU Outdoor Unit CU-KS36NKUA Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) () Low pressure performance chart Indoor discharge air temperature F( C) Low pressure at wide tube service valve Operating current (A) psig(mpag) 74 (.2) 59 (.) 45 (.0) 3 (0.9) 7 (0.8) 04 (0.7) -4 (-20) 5 (-5) 4 (-0) 23 (-5) (2) Operating current performance chart (-20) 5 (-5) 4 (-0) 23 (-5) (3) Indoor discharge air performance chart 64.4 (8) 60.8 (6) 57.2 (4) 53.6 (2) 50.0 (0) 46.4 (8) 42.8 (6) 32 (0) 32 (0) 4 (5) 50 (0) 59 (5) Outdoor inlet air DB temp. F( C) (5) (0) (5) Outdoor inlet air DB temp. F( C) 68 (20) 68 (20) Lo fan Indoor Air Temp.86 F (30 C) Lo fan Lo fan 77 (25) 77 (25) 80 F (27 C) 80 F (27 C) 75 F (24 C) 80 F (27 C) Indoor Air Temp.86 F (30 C) 75 F (24 C) Indoor Air Temp.86 F (30 C) 80 F (27 C) 75 F (24 C) 86 (30) 86 (30) Hi Fan Hi Fan Hi Fan 95 (35) 95 (35) 04 (40) 04 (40) -4 (-20) 5 (-5) 4 (-0) 23 (-5) 32 (0) (5) (0) (5) Outdoor inlet air DB temp. F( C) 68 (20) 77 (25) 86 (30) 95 (35) 04 (40) NOTE Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. 20

21 5-2. Cooling Capacity Indoor Unit : CS-KS30NKU Outdoor Unit : CU-KS30NKUA Power Supply : 230V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: 30,600 BTU/h AIR FLOW RATE: 630 CFM INDOOR OUTDOOR ENT. TEMP. o F ( o C) AMBIENT TEMP. o F ( o C) WB DB (8.3) (23.9) (29.4) (35.0) (40.6) (46.) TC 26,540 27,20 27,70 27,90 24,890 7,30 CI (22.2) SHC 9,90 9,430 9,800 9,920 8,330 4, (24.4) SHC 2,50 2,880 22,20 22,250 20,660 6,990 (5.0) 80 (26.7) SHC 23,960 24,330 24,570 24,690 23,00 7,30 84 (28.9) SHC 26,280 26,650 26,890 27,020 24,890 7,30 88 (3.) SHC 26,540 27,20 27,70 27,90 24,890 7,30 TC 3,580 30,90 30,60 29,630 25,270 7,560 CI (22.2) SHC 8,330 7,970 7,600 7,360 5,50, (24.4) SHC 20,660 20,290 9,920 9,680 7,480 4,050 (7.2) 80 (26.7) SHC 23,00 22,740 22,370 22,20 20,050 6, (28.9) SHC 25,430 25,060 24,690 24,450 22,370 7, (3.) SHC 27,750 27,50 27,020 26,770 24,690 7,560 TC 32,420 3,780 3,050 # 30,600 25,550 7,760 CI (22.2) SHC 5,50 4,790 4,420 4,300 2,00 8, (24.4) SHC 7,480 7,0 6,870 6,620 4,420,240 (9.4) 80 (26.7) SHC 9,920 9,560 9,30 9,070 6,870 3, (28.9) SHC 22,250 22,000 2,640 2,390 9,90 6,00 88 (3.) SHC 24,570 24,330 23,960 23,70 2,50 7,760 TC 33,30 32,540 3,840 3,490 25,70 7,880 CI (22.2) SHC,730,480,20,000 8,670 5, (24.4) SHC 4,050 3,80 3,440 3,320,20 8,30 (2.7) 80 (26.7) SHC 6,500 6,250 5,890 5,770 3,560 0, (28.9) SHC 8,820 8,580 8,330 8,20 5,890 3, (3.) SHC 2,50 20,900 20,660 20,530 8,20 5,400 TC 33,630 33,090 32,430 32,90 25,730 7,900 CI (24.4) SHC 0,750 0,50 0,260 0,40 7,940 5,370 (23.9) 80 (26.7) SHC 3,200 2,950 2,70 2,590 0,380 7, (28.9) SHC 5,520 5,280 5,030 5,030 2,70 0,40 88 (3.) SHC 7,840 7,720 7,480 7,360 5,030 2,590 TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h) NOTE. Rating conditions (#) : Indoor Unit Entering Air Temp. 80 F (26.7 C) DB / 67 F (9.4 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. 2

22 Indoor Unit : Outdoor Unit : Power supply : CS-KS36NKU CU-KS36NKUA 230V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: 34,000 BTU/h AIR FLOW RATE: 630 CFM INDOOR OUTDOOR ENT. TEMP. o F ( o C) AMBIENT TEMP. o F ( o C) WB DB (8.3) (23.9) (29.4) (35.0) (40.6) (46.) TC 27,450 28,40 28,840 29,040 24,650 6,770 CI (22.2) SHC 9,680 20,050 20,40 20,530 8,20 4, (24.4) SHC 22,000 22,370 22,740 22,860 20,530 6,740 (5.0) 80 (26.7) SHC 24,450 24,820 25,80 25,300 22,980 6, (28.9) SHC 26,770 27,40 27,50 27,630 24,650 6, (3.) SHC 27,450 28,40 28,840 29,040 24,650 6,770 TC 35,00 34,360 33,600 33,00 24,850 6,90 CI (22.2) SHC 20,70 9,800 9,30 9,070 5,030, (24.4) SHC 22,490 22,20 2,760 2,390 7,360 3,80 (7.2) 80 (26.7) SHC 24,940 24,570 24,200 23,840 9,800 6, (28.9) SHC 27,260 26,890 26,530 26,280 22,20 6,90 88 (3.) SHC 29,580 29,220 28,850 28,60 24,450 6,90 TC 35,720 35,20 34,400 # 34,000 24,930 6,970 CI (22.2) SHC 6,620 6,380 6,00 5,890,730 8, (24.4) SHC 9,070 8,700 8,330 8,20 4,80,000 (9.4) 80 (26.7) SHC 2,50 2,50 20,900 20,660 6,620 3, (28.9) SHC 23,840 23,590 23,230 22,980 8,940 5, (3.) SHC 26,60 25,920 25,550 25,300 2,270 6,970 TC 36,270 35,70 35,040 34,780 24,870 6,950 CI (22.2) SHC 3,070 2,830 2,460 2,340 8,430 5, (24.4) SHC 5,400 5,50 4,790 4,790 0,750 7,940 (2.7) 80 (26.7) SHC 7,840 7,600 7,360 7,230 3,200 0, (28.9) SHC 20,70 9,920 9,680 9,560 5,520 2,70 88 (3.) SHC 22,490 22,250 22,000 2,880 7,840 5,030 TC 36,560 36,070 35,450 34,630 24,680 6,830 CI (24.4) SHC,850,60,360,20 7,570 5,30 (23.9) 80 (26.7) SHC 4,300 4,050 3,80 3,560 0,020 7, (28.9) SHC 6,620 6,500 6,250 5,890 2,340 9, (3.) SHC 8,940 8,820 8,580 8,20 4,660 2,220 TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h) NOTE. Rating conditions (#) : Indoor Unit Entering Air Temp. 80 F (26.7 C) DB / 67 F (9.4 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. 22

23 5-3. Cooling Capacity (Low Ambient) Indoor Unit : Outdoor Unit : Power supply : CS-KS30NKU CU-KS30NKUA 230V Single Phase 60Hz < Cooling Capacity (Low Ambient) > RATING CAPACITY: 30,600 BTU/h AIR FLOW RATE: 630 CFM INDOOR OUTDOOR ENT. TEMP. o F ( o C) AMBIENT TEMP. o F ( o C) WB DB (-7.8) (-5.0) (-9.4) (-3.9) (.7) (7.2) (2.8) TC 30,20 30,060 29,930 29,780 29,590 29,330 29,070 CI (22.2) SHC 2,50 2,50 2,020 23,230 20,780 20,660 20, (24.4) SHC 23,470 23,470 23,350 25,550 23,230 22,980 22,860 (5.0) 80 (26.7) SHC 25,920 25,920 25,790 27,870 25,670 25,430 25, (28.9) SHC 28,240 28,240 28,20 29,780 27,990 27,870 27, (3.) SHC 30,20 30,060 29,930 29,780 29,590 29,330 29,070 TC 30,390 30,360 30,270 30,70 30,040 29,820 29,60 CI (22.2) SHC 7,720 7,720 7,600 23,230 7,480 7,360 7, (24.4) SHC 20,050 20,050 9,920 25,550 9,800 9,800 9,680 (7.2) 80 (26.7) SHC 22,490 22,490 22,370 27,870 22,370 22,250 22,20 84 (28.9) SHC 24,820 24,820 24,820 30,70 24,690 24,570 24, (3.) SHC 27,40 27,40 27,40 30,70 27,020 26,890 26,770 TC 30,490 30,480 30,450 30,400 30,330 30,60 30,020 CI (22.2) SHC 4,80 4,80 4,80 23,230 4,80 4,050 4, (24.4) SHC 6,500 6,500 6,500 25,550 6,500 6,380 6,380 (9.4) 80 (26.7) SHC 9,070 8,940 8,940 27,870 8,940 8,820 8, (28.9) SHC 2,390 2,390 2,390 30,200 2,270 2,50 2,50 88 (3.) SHC 23,70 23,70 23,70 30,400 23,590 23,590 23,470 TC 30,370 30,380 30,40 30,430 30,420 30,30 30,250 CI (22.2) SHC 0,50 0,50 0,50 23,230 0,630 0,50 0, (24.4) SHC 2,950 2,950 2,950 25,550 2,950 2,830 2,830 (2.7) 80 (26.7) SHC 5,400 5,400 5,400 27,870 5,400 5,280 5, (28.9) SHC 7,720 7,720 7,720 30,200 7,720 7,720 7, (3.) SHC 20,050 20,050 20,050 30,430 20,050 20,050 20,050 TC 30,030 30,080 30,70 30,240 30,30 30,250 30,270 CI (24.4) SHC 9,40 9,40 9,40 25,550 9,530 9,530 9,530 (23.9) 80 (26.7) SHC,850,850,850 27,870,970,970, (28.9) SHC 4,80 4,80 4,300 30,200 4,300 4,300 4, (3.) SHC 6,500 6,620 6,620 30,240 6,620 6,620 6,620 TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h) NOTE. 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. 2. Above data represents the value when the operation frequency of a compressor is fixed. 23

24 Indoor Unit : Outdoor Unit : Power supply : CS-KS36NKU CU-KS36NKUA 230V Single Phase 60Hz < Cooling Capacity (Low Ambient) > - RATING CAPACITY: 34,000 BTU/h AIR FLOW RATE: 630 CFM INDOOR OUTDOOR ENT. TEMP. o F ( o C) AMBIENT TEMP. o F ( o C) WB DB (-7.8) (-5.0) (-9.4) (-3.9) (.7) (7.2) (2.8) TC 30,900 30,870 30,800 30,70 30,590 30,400 30,20 CI (22.2) SHC 2,50 2,50 2,50 23,230 2,390 2,270 2, (24.4) SHC 23,960 23,840 23,840 25,550 23,70 23,590 23,470 (5.0) 80 (26.7) SHC 26,400 26,400 26,280 27,870 26,60 26,040 25, (28.9) SHC 28,730 28,730 28,60 30,200 28,480 28,480 28, (3.) SHC 30,900 30,870 30,800 30,70 30,590 30,400 30,20 TC 3,00 3,00 30,990 30,950 30,890 30,750 30,620 CI (22.2) SHC 7,970 7,970 7,970 23,230 7,970 7,840 7, (24.4) SHC 20,40 20,40 20,290 25,550 20,290 20,70 20,70 (7.2) 80 (26.7) SHC 22,860 22,860 22,740 27,870 22,740 22,60 22,60 84 (28.9) SHC 25,80 25,80 25,80 30,200 25,060 25,060 24, (3.) SHC 27,50 27,50 27,50 30,950 27,380 27,380 27,260 TC 30,90 30,940 30,980 3,000 3,00 30,930 30,880 CI (22.2) SHC 4,420 4,420 4,420 23,230 4,420 4,420 4, (24.4) SHC 6,740 6,740 6,740 25,550 6,740 6,740 6,740 (9.4) 80 (26.7) SHC 9,90 9,90 9,90 27,870 9,90 9,90 9,90 84 (28.9) SHC 2,50 2,50 2,640 30,200 2,640 2,50 2,50 88 (3.) SHC 23,840 23,960 23,960 3,000 23,960 23,960 23,840 TC 30,570 30,620 30,730 30,820 30,90 30,900 30,930 CI (22.2) SHC 0,630 0,630 0,750 23,230 0,750 0,750 0, (24.4) SHC 2,950 2,950 3,070 25,550 3,070 3,070 3,070 (2.7) 80 (26.7) SHC 5,400 5,400 5,520 27,870 5,520 5,520 5, (28.9) SHC 7,720 7,840 7,840 30,200 7,970 7,970 7, (3.) SHC 20,70 20,70 20,70 30,820 20,290 20,290 20,290 TC 30,00 30,090 30,260 30,430 30,590 30,650 30,770 CI (24.4) SHC 9,40 9,40 9,530 25,550 9,650 9,650 9,650 (23.9) 80 (26.7) SHC,850,850,970 27,870 2,00 2,00 2,00 84 (28.9) SHC 4,80 4,80 4,300 30,200 4,420 4,420 4, (3.) SHC 6,500 6,620 6,620 30,430 6,740 6,740 6,870 TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h) CI : Compressor Input (kw) NOTE 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. 2 Above data represents the value when the operation frequency of a compressor is fixed. 24

25 5-4. Air Throw Distance Charts Indoor Unit CS-KS30NKU Cooling Room air temp. : 80 F (26.7 C) Fan speed : High Horizontal distance (ft.) Axis air velocity (ft./sec.) Vertical distance (ft.) : Flap angle 0, : Axis air velocity 0 : Flap angle 30, : Axis air velocity 30 25

26 Indoor Unit CS-KS36NKU Cooling Room air temp. : 80 F (26.7 C) Fan speed : High Horizontal distance (ft.) Axis air velocity (ft./sec.) Vertical distance (ft.) : Flap angle 0, : Axis air velocity 0 : Flap angle 30, : Axis air velocity 30 26

27 6. ELECTRICAL DATA 6-. Electrical Characteristics Indoor Unit CS-KS30NKU Outdoor Unit CU-KS30NKUA () Voltage:230V Cooling Indoor Fan Motor Performance at Rating conditions Running amp. A 0.4 Power input W 39 UnitOutdoor Unit Fan Motor + Compressor 230V Single-phase 60Hz 6. 3,25 < 230V > Complete Unit 6.5 3,290 Rating conditions: Indoor air temperature: 80 F (26.7 C) DB / 67 F (9.4 C) WB Outdoor air temperature: 95 F (35 C) DB (2) Voltage:208V Cooling Indoor Fan Motor Performance at Rating conditions Running amp. Power input A W Rating conditions: Indoor air temperature: 80 F (26.7 C) DB / 67 F (9.4 C) WB Outdoor air temperature: 95 F (35 C) DB UnitOutdoor Unit Fan Motor + Compressor 208V Single-phase 60Hz 7.6 3,25 < 208V > Complete Unit 8.0 3,290 27

28 Indoor Unit CS-KS36NKU Outdoor Unit CU-KS36NKUA () Voltage:230V Cooling Indoor Fan Motor Performance at Rating conditions Running amp. A 0.4 Power input W 39 UnitOutdoor Unit Fan Motor + Compressor 230V Single-phase 60Hz 9.6 3,96 < 230V > Complete Unit ,000 Rating conditions: Indoor air temperature: 80 F (26.7 C) DB / 67 F (9.4 C) WB Outdoor air temperature: 95 F (35 C) DB (2) Voltage:208V Cooling Indoor Fan Motor Performance at Rating conditions Running amp. Power input A W Rating conditions: Indoor air temperature: 80 F (26.7 C) DB / 67 F (9.4 C) WB Outdoor air temperature: 95 F (35 C) DB UnitOutdoor Unit Fan Motor + Compressor 208V Single-phase 60Hz 2.5 3,96 < 208V > Complete Unit 2.9 4,000 28

29 6-2. Electric Wiring Diagrams Indoor Unit CS-KS30NKU CS-KS36NKU EVAPORATOR M FLAP MOTOR PL ELEC J-B GRN/YEL RED ORG YEL PNK BLU GRN GND FLAP 5P (WHT) GND 2P (WHT) + + AC IN COM + BLK WHT RED SI LAMP 9P (WHT) CONTROLLER TERMINAL BASE 2 3 U U2 GND WHT BLK BLK BLK BLK BLK BLK BLK BLK TO OUTDOOR UNIT IND LAMP ASSY OPERATION SW M FAN MOTOR RED BLK WHT YEL BLU DCM 7P (WHT) S-LINK (RAC) 4P (BLU) T0 6P (BLU) COIL 2P (WHT) ROOM/UV 4P (WHT) BLK BLK BLK BLK COIL THERMISTOR ROOM THERMISTOR 8FA

30 Outdoor Unit CU-KS30NKUA CU-KS36NKUA 8FA CONTROL P.C.BOARD NOISE FILTER P.C. BOARD HIC BOARD + + HIC- W T S R V U HIC+ + L + L2 + DC- TH0 (YEL) TH + + M 3 COMPRESSOR MOTOR BLU WHT RED HIC (WHT) CN0 (WHT) WHT BLK BLK BLK BLK BLK BLK BLK BLK BLK HIC2 (WHT) CN02 (WHT) BLK BLK BLK BLK BLK BLK BLK BLK (WHT) MV (WHT) TEST/MV MAGNETIC COIL HEAT SINK (RADIATOR) BRIDGE DIODE ORG RED YEL BLK GRY 2 2 (BLK) COIL YEL YEL COIL THERMISTOR 2 2 (GRN) PRY BLK WHT (WHT) DCOUT BLK WHT (ORG) ACOUT BLK WHT (BRN) (GRN) (WHT) (ORG) (BRN) CT PRY DCIN ACIN CT WHT WHT 2 2 INDOOR UNIT POWER SUPPLY GND TERMINAL (5P) FM2 (RED) RED BLU BRN WHT ORG FM (RED) FAN MOTOR REACTOR C w E2 w E YEL YEL BLU w CH2 CRANKCASE HEATER WHT WHT WHT DC+ YEL GRY YEL + + AC2 w AC IN2 w AC IN WHT + + AC BLK M M 2 2 (WHT) COMP BLK BLK COMPRESSOR THERMISTOR 2 2 (YEL) OUTDOOR BLK BLK OUTDOOR THERMISTOR GRN/YEL 2 2 (BLK) HP-SW RED RED HIGH PRESSURE SW 2 2 (RED) OLR WHT WHT OVER LOAD RELAY BLK WHT + L3 + L4 BLK WHT + C + C2 + HIC+ + HIC- BLK WHT w w CH SI w S-COM WHT BLK WHT RED WHT BLK WHT GRN GRN 30

31 7. FUNCTIONS 7-. Operation Functions Emergency operation Emergency operation is available when the remote controller malfunctions, has been lost, or otherwise cannot be used. To operate the system, press the OPERATION button, which is also used as the receiver, below the unit display. Each time this button is pressed, the OPERATION lamp changes color to indicate the type of operation. Select the desired type of operation. SENSOR DRY During DRY operation, the system adjusts the room temperature and fan speed according to the conditions in the room, in order to maintain a comfortable room environment. SENSOR DRY operation DRY operation is as shown in the figure below. Load COOL (GREEN) STOP (Lamp Off) COOL zone A zone The set temperature is 4 F(2 C) below the detected room temperature in the case of cooling operation. B zone Conditions are monitored at all times when the room temperature is below 59 F(5 C). DRY A The compressor operation frequency varies. The indoor fan operates with /f fluctuation. DRY B The compressor operates at a low operating frequency. The indoor fan operates with /f fluctuation. Monitor Monitoring operation takes place when the room temperature is below 59 F(5 C), or more than 5 F(3 C) below the set temperature. When the monitoring range is entered, the compressor stops, and the indoor fan operates with /f fluctuation. NOTE The Sensor Dry operation during the Low Ambient Cooling Mode (outside air temperature : 59 F(5 C) or lower) is as follows. DRY A and DRY B When room temperature rises above the set temperature, the compressor turns ON. When room temperature falls below the set temperature, the compressor turns OFF. 3

32 HIGH POWER This function acts to raise the power but keeps the AC system in the same operating mode. This function is set with the HIGH POWER button on the remote controller. (It can be set regardless of the temperature and fan speed settings.) HIGH POWER operation from remote controller The unit operates at maximum output for 30 minutes, regardless of the desired temperature. The fan speed is step above "High." Frequency MAX NIGHT SETBACK When NIGHT SETBACK operation is set, the temperature and fan speed settings will be adjusted automatically to allow comfortable sleep. When NIGHT SETBACK operation is set, " mark" appears on the remote controller. The main unit display lamp also becomes dimmer. COOL and DRY modes When the night setback mode is selected, the air conditioner automatically raises the temperature setting 2 F( C) when 30 minutes have passed after the selection was made, and then another 2 F( C) after another 30 minutes have passed, regardless of the indoor temperature when night setback was selected. This enables you to save energy without sacrificing comfort. This function is convenient when gentle cooling is needed min. 5 min. Time Setting temperature 2 F( C) 2 F( C) NOTE Start End When HIGH POWER operation ends, the unit operates at low Hz for 5 minutes, regardless of the thermostat OFF conditions. When in DRY mode, operation is in the cooling zone. Press the NIGHT SETBACK button 30 min. 30 min. Time Lamp colors OPERATION lamp DRY operation COOL operation FAN operation TIMER lamp Orange Green Green Green Timer backup Operation stops if there are no operator controls for 25 hours or longer after unit operation switched from OFF to ON by use of ON timer operation. 32

33 Noise Reducing Control (Outdoor Unit) The noise reducing control is the function used for silent operation of the air conditioner by means of setting the dip switch on the outdoor unit P.C.Board to control the fan and compressor's motor speed. NOTE When this function is used, the cooling ability is slightly degraded. Therefore, when this function is to be enabled, make sure to receive the approval of the client. <Operation Sound> Noise Reducing Control Specifications (Fan's motor speed : 500rpm) Cooling Cooling 55 db-a 47 db-a Outdoor Air Temp. F( C) <In Cooling Operation> Normal Operation 9(33) 82(28) Normal Operation or Noise Reducing Operation is kept. (Initial setting is the normal operation.) Noise Reducing Operation NOTE. In the test operation, high-power operation, defrost operation or low ambient cooling operation (to be cancelled at the outside temperature of 57 F(4 C) or less, or 63 F(7 C) or more), the noise reducing control is not available. 2. In the noise reducing operation, the fan's maximum motor speed is limited to 500rpm. Also, the maximum frequency (Hz) is controlled in the cooling (30Hz) or heating operation (30Hz). <Switching Procedure to Noise Reducing Control> () Remove the 3 screws fixing the inspection panel and remove the inspection panel. (Fig. 2) (2) When the switch No. of the dip switch (SW0) on the control P.C.Board is turned ON, the noise reducing control is enabled. (Fig. 3) Power lamp Control P.C.Board ON Inspection panel 2 Dip switch (SW0) Slide downward SW0 Fig.3 Control P.C.Board Fig.2 View from front 33

34 Maximum Current Value Change Function The maximum current value is changed to 4A (for CU-KS30NKUA) or 7A (for CU-KS36NKUA) to prevent power breaker tripping. (It is set to 24A when the unit is delivered from the factory.) NOTE. When the high load is given (Outside temperature is high in the cooling operation), the capacity is reduced. When the maximum current value change function is to be enabled, make sure to receive the approval of the client. 2. The maximum capacity for cooling operation is about as much as the rated capacity. Description of function Frequency Current Target frequency Example of operation Frequency Stops operation Approx.3 minutes Power Point C Point B Point A Operates at the target frequency at Point A and below. Stops increases to the frequency between Points A and B. Reduces the frequency by Hz per 0.5 seconds when Point B is exceeded. Stops operation, and restarts it appoximately 5 minutes later, if Point C is exceeded. (May operate when sudden voltage fluctuations occur. Indicates trouble.) < CU-KS30NKUA > Current Value on the Point C Current Value on the Point B Current Value on the Point A < CU-KS36NKUA > Current Value on the Point C Current Value on the Point B Current Value on the Point A In cooling operation (25.0) In cooling operation (25.0) <Maximum Current Value Change Procedure> () Remove the inspection panel. Refer to Fig. 2 in " Noise Reducing Control" for details. (2) When the switch No.2 of the dip switch (SW0) on the control P.C.Board is turned ON, the maximum current value change. (Fig. 4) Power lamp Dip Switch (SW0) Switch No.2 ON OFF Max. Current Value CU-KS30NKUA CU-KS36NKUA 4.0A 7.0A 22.0A 24.0A ON 2 Dip switch (SW0) SW0 Fig.4 Control P.C.Board 34

35 7-2. Protective Functions Freeze prevention During COOL or DRY operation, freezing is detected and operation is stopped when the temperature of the indoor heat exchanger matches the conditions below.. Freeze-prevention operation is engaged when the temperature of the indoor heat exchanger is below 4 F(5 C). 2. Restart after freeze-prevention operation occurs when the temperature of the indoor heat exchanger reaches 46 F(8 C) or above. Indoor heat exchanger temperature F( C) 46 (8) 4 (5) 36 (2) * A a b c d a. Area: Automatic capacity control b. When the temperature drops below Point A, the operation frequency is reduced by a certain proportion. c. Area: Frequency increase is prohibited. d. When the temperature reaches Point C or above, freezing prevention is ended and control is the same as in the a area. * When the temperature drops to below 36 F(2 C) (continuously for 2 minutes or longer), the compressor stops. Once the freeze condition is detected, the air conditioner will work less than the maximum frequency until it is turned off. B C Compressor discharge temperature control This function controls the operation frequency to prevent the compressor discharge temperature from rising more than a specified temperature. Compressor discharge temperature F( C) Approx. 24 (0) Approx. 20 (94) A a b c d a. Area: Automatic capacity control. b. When the temperature rises above Point A, the operation frequency is reduced at a specified rate. c. Area: Further frequency increase is prohibited. d. When the temperature falls below Point B, prevention of a rise in frequency is released and the air conditioner operates as in a area. * The compressor will stop if the temperature of the compressor discharge exceeds 248 F(20 C) due to shortage of gas or other reason. CT (Peak current cut-off control) This function prevents the circuit breaker or fuse from operating to open the circuit. This function works when electrical current has increased due to an increase in the cooling load, or to a decrease in the power supply voltage. In these cases, operation frequency is reduced or operation is interrupted automatically to control the electrical current for operation. When the cause of the increase in electrical current is rectified, the system will resume operation in the original mode. < CS-KS30NKU > (A) Cooling Dry Peak current cut-off trips 25.0 Hz down 22.0 B < CS-KS36NKU> Cooling Dry Peak current cut-off trips 25.0 Hz down 24.0 (A) 35

36 8. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) 8-. Precautions before Performing Inspection or Repair After checking the self-diagnostics monitor, turn the power OFF before starting inspection or repair. High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge (charging voltage DC 30V) even after the power is turned OFF, and some time is required for the charge to dissipate. Be careful not to touch any electrified parts before the controller LED (red) turns OFF. If the outdoor controller is normal, approximately 30 seconds will be required for the charge to dissipate. However, allow at least 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller Method of Self-Diagnostics Follow the procedure below to perform detailed trouble diagnostics. NOTE < Clock display > Test run mode Deletion of self-diagnostics report mode Self-diagnostics mode : If the operation lamp blinks every 0.5 seconds immediately when the power is turned ON, there is an external ROM (OTP data) failure on the indoor circuit board, or a ROM socket insertion problem, or the ROM has not been installed. 2: The failure mode is stored in memory even when the power is not ON. Follow the procedure below to perform diagnostics. PROCEDURE After turning on power to the air conditioner, use the remote controller and follow the steps below to execute self-diagnostics. Step : Press and hold the remote controller QUIET button and HR TIMER button. Then, press and hold the ACL (reset) button with a pointed object such as the tip of a pen. After 5 seconds, release ACL button first, then release QUIET and HR TIMER buttons, "op-" (test run) appears, blinking in the remote controller clock display area. Step 2: Next, press the HR TIMER button twice to change the display from "op-" to "op-2" and "op-3" (self-diagnostics). (The display continues to blink.) Step 3: Finally press the ON/OFF button to engage self-diagnostics mode. The self-diagnostics function utilizes the 3 indicator lamps on the main unit, in combinations of ON lamps, blinking lamps, and OFF lamps, to report the existence of sensor trouble or a protective operation. (The lamps blink or remain ON for 5 seconds, then turn OFF for 2 seconds.) Self-diagnostics is completed when the buzzer sounds 3 short beeps. A maximum of 3 self-diagnostics reports are displayed, for 5 seconds each, beginning with the most recent report. Following this display the lamps turn OFF. In order to view the self-diagnostics results again, press the ON/OFF button again. The 3 lamps remain OFF if no trouble has occurred. <IMPORTANT> After self-diagnostics is completed, be sure to press the ACL (reset) button to return to normal mode. The air conditioner will not operate if this is not done. QUIET button ON/OFF operation button HR. TIMER button ACL (Reset) button 36