TECHNICAL & SERVICE MANUAL CS-KE30NKU + CU-KE30NKU CS-KE36NKU + CU-KE36NKU DC INVERTER SPLIT SYSTEM AIR CONDITIONER Indoor Model No. Product Code No. Outdoor Model No. Product Code No. CS-KE30NKU 1 852 360 88 CU-KE30NKU 1 852 360 82 CS-KE36NKU 1 852 360 89 CU-KE36NKU 1 852 360 83 Indoor Unit Outdoor Unit AIR CONDITIONER CS-KE30NKU CS-KE36NKU CU-KE30NKU CU-KE36NKU IMPORTANT These air conditioners employ new refrigerant R410A. Pay special attention when servicing the unit. REFERENCE NO.
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.
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.
Table of Contents Page SAFETY PRECAUTIONS .............................................................................................................. 2 TABLE OF CONTENTS ..................................................................................................................... 4 1. OPERATING RANGE ................................................................................................................... 6 2. SPECIFICATIONS 2-1. Unit Specifications .................................
Page 9. CHECKING ELECTRICAL COMPONENTS 9-1. Measurement of Insulation Resistance ............................................................................... 9-2. Checking Continuity of Fuse on PCB Ass'y ......................................................................... 51 52 10. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT 10-1. Characteristics of New Refrigerant R410A ......................................................................... 10-2. Checklist before Servicing ......
1. OPERATING RANGE Temperature Cooling Heating Indoor Air Intake Temp. Outdoor Air Intake Temp.
2. SPECIFICATIONS 2-1. Unit Specifications Indoor Unit Outdoor Unit CS-KE30NKU CU-KE30NKU < 230V > 230V Single-Phase 60Hz Dimensions & Weight Features Electrical Rating Performance Voltage Rating Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound Indoor : Hi/Me/Lo/Qt* dB-A (*Qt = Quiet mode) Outdoor : Hi dB-A Refrigerant Tubing Connections Max.
Indoor Unit Outdoor Unit CS-KE30NKU CU-KE30NKU < 208V > 208V Single-Phase 60Hz Dimensions & Weight Features Electrical Rating Performance Voltage Rating Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound Indoor : Hi/Me/Lo/Qt* dB-A (*Qt = Quiet mode) Outdoor : Hi dB-A Refrigerant Tubing Connections Max.
Indoor Unit Outdoor Unit CS-KE36NKU CU-KE36NKU < 230V > 230V Single-Phase 60Hz Dimensions & Weight Features Electrical Rating Performance Voltage Rating Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound Indoor : Hi/Me/Lo/Qt* dB-A (*Qt = Quiet mode) Outdoor : Hi dB-A Refrigerant Tubing Connections Max.
Indoor Unit Outdoor Unit CS-KE36NKU CU-KE36NKU < 208V > 208V Single-Phase 60Hz Dimensions & Weight Features Electrical Rating Performance Voltage Rating Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g) Refrigerant Control Operation Sound Indoor : Hi/Me/Lo/Qt* dB-A (*Qt = Quiet mode) Outdoor : Hi dB-A Refrigerant Tubing Connections Max.
2-2. Major Component Specifications 2-2-1. Indoor Unit Indoor Unit CS-KE30NKU Control PCB Part No. Controls Control Circuit Fuse CB-CS-KE30NKU Microprocessor 250V 3A Fan Type Q'ty ... Dia. and Length Cross-Flow 1 ... D3-15/16 / L32-1 (D100/L838) inch (mm) Fan Motor Type Model ... Q'ty No. of Poles Rough Measure RPM (Cool / Heat) Nominal Output Coil Resistance (Ambient Temp.
Indoor Unit CS-KE36NKU Control PCB Part No. Controls Control Circuit Fuse CB-CS-KE36NKU Microprocessor 250V 3A Fan Type Q'ty ... Dia. and Length Cross-Flow 1 ... D3-15/16 / L32-1 (D100/L838) inch (mm) Fan Motor Type Model ... Q'ty No. of Poles Rough Measure RPM (Cool / Heat) 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.
2-2-2. Outdoor Unit Outdoor Unit CU-KE30NKU P.C.Board Part No. Controls Circuit Fuse Control P.C.B Noise Filer P.C.B H.I.C.Board CR-CH3082-F Microprocessor 400V 3.15A POW-CH3082-B2 250V 25A HIC-CH3072R-C1 - Compressor Type Compressor Model / Nominal Output Compressor Oil ... Amount Pints (cc) Coil Resistance (Ambient Temp. 77 °F (25 °C)) Ohm DC Twin Rotary (Hermetic) C-9RVN273H0H / 2,250W FV68S ... 2.98 (1,400) T - R : 0.169 T - S : 0.169 R - S : 0.
Outdoor Unit CU-KE36NKU P.C.Board Part No. Controls Circuit Fuse Control P.C.B Noise Filer P.C.B H.I.C.Board CR-CH3682-F Microprocessor 400V 3.15A POW-CH3082-B2 250V 25A HIC-CH3072R-C1 - Compressor Type Compressor Model / Nominal Output Compressor Oil ... Amount Pints (cc) Coil Resistance (Ambient Temp. 77 °F (25 °C)) Ohm DC Twin Rotary (Hermetic) C-9RVN273H0H / 2,500W FV68S ... 2.98 (1,400) T - R : 0.169 T - S : 0.169 R - S : 0.
2-3.
7/16 2-5/8 2-5/8 3-3/8 2-3/8 9-1/16 (230) 11-13/16 (300) (3/32) 4-9/16 23/32 1-7/8 32 5/ 3- 11-13/16 dia . 16 7-23/32 5-1/2 1-3/32 19-9/16 17-5/16 16-11/32 3-3/4 1-9/32 2-3/4 5-9/16 3-3/4 5-3/16 22-3/8 17-21/32 16-11/32 17-23/32 Narrow tube dia. 3/8" (9.52) Wide tube dia. 5/8" (15.88) 15-1/8 6-7/32 7-25/32 1-27/32 25/32 7-7/8 9-3/32 5-27/32 .3 dia 2 -5/ 3 4-9/16 1-15/32 2-3/32 2-11/16 CS-KE30NKU CS-KE36NKU 1-7/8 2-3/8 Indoor Unit 41-15/16 (1065) 3.
37-1/32 (940) 1/2 3/4 2-3/8 2-17/32 2-5/32 13-3/8 (340) 16-5/32 14-31/32 Refrigerant tubing joint (Gas tube) Flare connection dia.5/8" (15.88) Refrigerant tubing joint (Liquid tube) Flare connection dia.3/8" (9.52) 1-15/16 1-27/32 1/2 13-9/32 23/32 35-13/16 (910) 1-1/32 11-13/32 2-3/8 2-3/8 3-3/8 2-17/32 3/4 2-ID:1-1/4 holes (holes for drain) Of the 4-ID:1-1/4 holes, use 1 of 2 holes specified for drain use to install the port. Use rubber plugs to seal the remaining 3 holes.
4. REFRIGERANT FLOW DIAGRAM CS-KE30NKU CS-KE36NKU Outdoor Unit CU-KE30NKU CU-KE36NKU Indoor unit Outdoor unit Wide tube O.D 5/8" (15.88 mm) Sub Main Accumulator Accumulator Wide tube service valve High pressure switch H.P. Muffler Heat exchanger 4-way valve Heat exchanger Indoor Unit Compressor 4-1. Refrigerant Flow Diagram Narrow tube O.D. 3/8" (9.
5. PERFORMANCE DATA 5-1. Temperature Charts Indoor Unit CS-KE30NKU Outdoor Unit CU-KE30NKU Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) Low pressure at wide tube service valve psig(MPaG) (1) Low pressure performance chart Lo fan Hi Fan 174 (1.2) 0°C) F (3 .86° p m ir Te C) or A (27° Indo 80°F C) (24° 75°F 159 (1.1) 145 (1.0) 131 (0.9) 117 (0.8) 104 (0.
Indoor Unit CS-KE30NKU Outdoor Unit CU-KE30NKU Heating Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) High pressure at wide tube service valve psig (MPaG) (1) High pressure performance chart 494 (3.4) 421 (2.9) C) 23° °F ( 3 7 . mp ir te ) or a 1°C Indo F (2 70° ) 7°C F (1 63° 348 (2.4) 275 (1.9) 23 (Ð5) 32 41 50 59 68 (0) (5) (10) (15) (20) Outdoor inlet air DB temp.
Indoor Unit CS-KE36NKU Outdoor Unit CU-KE36NKU Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) Low pressure at wide tube service valve psig(MPaG) (1) Low pressure performance chart Lo fan 174 (1.2) 159 (1.1) Hi Fan ) (30°C .86°F p m e T ) r Air (27°C Indoo 80°F ) (24°C 75°F 145 (1.0) 131 (0.9) 117 (0.8) 104 (0.
Indoor Unit CS-KE36NKU Outdoor Unit CU-KE36NKU Heating Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V) High pressure at wide tube service valve psig (MPaG) (1) High pressure performance chart 494 (3.4) 421 (2.9) °C) (23 °F 3 7 . mp r te r ai o o ) Ind 1°C F (2 ° 0 7 ) 7°C F (1 63° 348 (2.4) 275 (1.9) 23 (Ð5) 32 41 50 59 68 (0) (5) (10) (15) (20) Outdoor inlet air DB temp.
5-2. Cooling Capacity Indoor Unit : CS-KE30NKU Outdoor Unit : CU-KE30NKU Power Supply : 230V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: 30,600 BTU/h INDOOR o o ENT. TEMP. F ( C) WB 59 (15.0) 63 (17.2) 67 (19.4) 71 (21.7) 75 (23.9) 72 76 80 84 88 72 76 80 84 88 72 76 80 84 88 76 80 84 88 630 CFM OUTDOOR o o AMBIENT TEMP. F ( C) DB 72 76 80 84 88 AIR FLOW RATE: 65 (18.3) 75 (23.9) 85 (29.4) 95 (35.0) 105 (40.6) 115 (46.1) TC CI 26,540 2.07 27,120 2.43 27,710 2.
Indoor Unit : CS-KE36NKU Outdoor Unit : CU-KE36NKU Power Supply : 230V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: 34,000 BTU/h INDOOR o o ENT. TEMP. F ( C) WB 59 (15.0) 63 (17.2) 67 (19.4) 71 (21.7) 75 (23.9) 72 76 80 84 88 72 76 80 84 88 72 76 80 84 88 76 80 84 88 (22.2) (24.4) (26.7) (28.9) (31.1) (22.2) (24.4) (26.7) (28.9) (31.1) (22.2) (24.4) (26.7) (28.9) (31.1) (22.2) (24.4) (26.7) (28.9) (31.1) (24.4) (26.7) (28.9) (31.1) 630 CFM OUTDOOR o o AMBIENT TEMP.
5-3. Cooling Capacity (Low Ambient) Indoor Unit : CS-KE30NKU Outdoor Unit : CU-KE30NKU Power Supply : 230V Single Phase 60Hz < Cooling Capacity (Low Ambient) > RATING CAPACITY: INDOOR o o ENT. TEMP. F ( C) WB DB 59 (15.0) 63 (17.2) 67 (19.4) 71 (21.7) 75 (23.9) 72 76 80 84 88 (22.2) (24.4) (26.7) (28.9) (31.1) 72 76 80 84 88 (22.2) (24.4) (26.7) (28.9) (31.1) 72 76 80 84 88 (22.2) (24.4) (26.7) (28.9) (31.1) 72 76 80 84 88 (22.2) (24.4) (26.7) (28.9) (31.1) 76 80 84 88 (24.4) (26.7) (28.
Indoor Unit : CS-KE36NKU Outdoor Unit : CU-KE36NKU Power Supply : 230V Single Phase 60Hz < Cooling Capacity (Low Ambient) > RATING CAPACITY: INDOOR o o ENT. TEMP. F ( C) WB DB 59 (15.0) 63 (17.2) 67 (19.4) 71 (21.7) 75 (23.9) 34,000 BTU/h TC 0 (-17.8) 30,900 AIR FLOW RATE: OUTDOOR o o AMBIENT TEMP. F ( C) 5 15 25 35 (-15.0) (-9.4) (-3.9) (1.7) 30,870 30,800 30,710 30,590 630 CFM 45 (7.2) 30,400 55 (12.8) 30,210 72 76 80 84 88 (22.2) (24.4) (26.7) (28.9) (31.
5-4. Heating Capacity Indoor Unit : CS-KE30NKU Outdoor Unit : CU-KE30NKU Power Supply : 230V Single Phase 60Hz < Heating Capacity > RATING CAPACITY: 33,000 BTU/h OUTDOOR o o ENT. TEMP. F ( C) 3 (-16.1) 8 (-13.3) 13 (-10.6) 18 (-7.8) 23 (-5.0) 28 (-2.2) 33 (0.6) 38 (3.3) 43 (6.1) 48 (8.9) 53 (11.7) 58 (14.4) 63 (17.2) 65 (18.3) 671 CFM INDOOR o o AMBIENT TEMP. F ( C) WB 0 (-17.8) AIR FLOW RATE: TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI 60 (15.
Indoor Unit : CS-KE36NKU Outdoor Unit : CU-KE36NKU Power Supply : 230V Single Phase 60Hz < Heating Capacity > RATING CAPACITY: 36,000 BTU/h OUTDOOR o o ENT. TEMP. F ( C) 3 (-16.1) 8 (-13.3) 13 (-10.6) 18 (-7.8) 23 (-5.0) 28 (-2.2) 33 (0.6) 38 (3.3) 43 (6.1) 48 (8.9) 53 (11.7) 58 (14.4) 63 (17.2) 65 (18.3) 671 CFM INDOOR o o AMBIENT TEMP. F ( C) WB 0 (-17.8) AIR FLOW RATE: TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI TH CI 60 (15.6) 65 (18.3) 70 (21.
5-5. Air Throw Distance Charts Indoor Unit Cooling CS-KE30NKU Room air temp.:80°F (26.7°C) Fan speed:High Horizontal distance (ft.) 0 5 10 15 20 25 30 25 30 Axis air velocity (ft./sec.) Vertical distance (ft.) 0 5 10 15 : Flap angle 0 , : Flap angle 30 , Heating : Axis air velocity 0 : Axis air velocity 30 Room air temp.:70°F (21.1°C) Fan speed:High Horizontal distance (ft.) 0 5 10 15 20 Axis air velocity (ft./sec.) Vertical distance (ft.
Indoor Unit Cooling CS-KE36NKU Room air temp.:80°F (26.7°C) Fan speed:High Horizontal distance (ft.) 0 5 10 15 20 25 30 Axis air velocity (ft./sec.) Vertical distance (ft.) 0 5 10 15 : Flap angle 0 , : Flap angle 30 , Heating : Axis air velocity 0 : Axis air velocity 30 Room air temp.:70°F (21.1°C) Fan speed:High Horizontal distance (ft.) 0 5 10 15 20 25 Axis air velocity (ft./sec.) Vertical distance (ft.
6. ELECTRICAL DATA 6-1. Electrical Characteristics Indoor Unit CS-KE30NKU Outdoor Unit CU-KE30NKU (1) Voltage:230V < 230V > Cooling Indoor Fan Motor Performance at Rating conditions Rating conditions: Running amp. Power input Indoor air temperature: Outdoor air temperature: A W 0.4 39 UnitOutdoor Unit Fan Motor + Compressor 230V Single-phase 60Hz 16.1 3,251 Complete Unit 16.5 3,290 80 °F (26.7 °C) DB / 67 °F (19.
Indoor Unit CS-KE36NKU Outdoor Unit CU-KE36NKU (1) Voltage:230V < 230V > Cooling Indoor Fan Motor Performance at Rating conditions Rating conditions: Running amp. Power input Indoor air temperature: Outdoor air temperature: A W 0.4 39 UnitOutdoor Unit Fan Motor + Compressor 230V Single-phase 60Hz 19.6 3,961 Complete Unit 20.0 4,000 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB 95 °F (35 °C) DB Heating Indoor Fan Motor Performance at Rating conditions Rating conditions: Running amp.
6-2.
Outdoor Unit CU-KE30NKU CU-KE36NKU REACTANCE 1P-CONNECTOR(WHT) 1 1 BLK w w L1 L2 E2 E w U 25A CONTROLLER COMPRESSOR MOTOR BLU BRN WHT ORG *ELEC SYSTEM ASSY BLK ACIN2 w WHT SI-A w RED 1 2 BLK 5 WHT 6 L POWER SUPPLY 1 2 3 4 5 1 2 3 4 5 HIGH PRESSURE SWITCH 1 1 BLK 2 2 BLK 2P-CONNECTOR (BLK) MAGNETIC COIL FAN MOTOR WHT WHT GND 4 N MV0 FM OVERLOAD RELAY (OLR) ACIN1 w ORG RED GRY WHT YEL 1 2 3 4 5 6 7 1 2 3 4 5 6 7 RED OUT DOOR THERMISTOR W BLU BRN WHT ORG 1 2 3 4 5 1 2 3
7. FUNCTIONS 7-1. Operation Functions Emergency operation SENSOR DRY Emergency operation is available when the remote controller malfunctions, has been lost, or otherwise cannot be used. 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. To operate the system, press the OPERATION button, which is also used as the receiver, below the unit display.
HIGH POWER NIGHT SETBACK 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.) • 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.
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 or heating ability is slightly degraded. Therefore, when this function is to be enabled, make sure to receive the approval of the client.
Maximum Current Value Change Function The maximum current value is changed to 14A (for CU-KE30NKU) or 17A (for CU-KE36NKU) to prevent power breaker tripping. (It is set to 24A (in cooling) or 22A (in heating) when the unit is delivered from the factory.) 1. When the high load is given (Outside temperature is high in the cooling operation, or outdoor temperature is low in the heating operation), the capacity is reduced.
7-2. Protective Functions Overload prevention during heating Cold-air prevention during heating Indoor heat exchanger temperature °F(°C) During HEAT operation, the temperature of the indoor heat exchanger is used to control the frequency and lessen the load on the compressor before the protective device is activated. Approx. 133 (56) During heating, the fan speed is set to "LL" (very low) or stopped. As the temperature of the indoor heat exchanger rises, the fan speed is changed to the set speed.
Defrost detection and release 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 / heating 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.
8. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) 8-1. 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 310V) even after the power is turned OFF, and some time is required for the charge to dissipate.
(1) Self-diagnostics Lamps INDOOR UNIT (1) OPERATION lamp (2) TIMER lamp OPERATION TIMER (3) ON/OFF Since the indications cover various units, the corresponding parts listed below may not be present in some models. .... OFF INDICATION ON INDOOR UNIT ALARM CODE (3) ... TIMER (2) .. OPERATION ERROE (1) . CODE .... BLINKING DIAGNOSIS CONTENTS .... ON POSSIBLE MALFUNCTION F10 S01 ROOM TEMP. SENSOR TROUBLE (1) OPEN OR SHORT CIRCUIT IN SENSOR F02 HEAT EXCHANGER S02 I/DTEMP.
(2) If the self-diagnostics function fails to operate Check the indoor unit. No indicators illuminate and the indoor fan does not rotate. Check the power voltage. Blown Is the fuse blown? Normal Replace the circuit board or the fuse. Replace the controller.
8-3. Checking the Indoor and Outdoor Units (1) Checking the indoor unit No. 1 Control Use the remote controller to operate the unit in "TEST run" mode. To determine whether the mode is currently in "TEST run" mode, check the 4 indicator lamps on the unit. If all 4 are blinking, the current mode is "TEST run." Check items (unit operation) • The rated voltage must be present between inter-unit wirings 1 and 2. • Connect a 5 k ohm resistor between inter-unit wirings 2 and 3.
(3) Serial Communication Error Identification Procedure If the lamps on the main body show the following conditions after the completion of self-diagnostics, a communication error between the indoor unit and outdoor unit might be considered. In such a case, identify the breakdown section by using the following procedure. NOTE Refer to "Method of Self-Diagnostics" for the self-diagnostics procedure.
( Continued from the previous page A. ) A ( Continued from the previous page B. ) B Is the voltage of about DC22V to 24V given between the terminals 2 and 3 on the indoor unit terminal strip (Serial Communication Line) ? (Fig. 2) Yes No Defect in the indoor unit P.C. board Defect or connection error in the inter-unit cable Outdoor Unit 1. Turn OFF the power and wait until the power lamp (LED) of the outdoor unit controller is turned OFF. 2.
(3-2) Alarm Code : E07/P04/P05/P20/P27 Troubleshooting Serial Communication Outdoor Unit 1 2 3 4 5 6 Power 1. Turn off the power and wait until the power lamp (LED) of the outdoor unit controller is turned OFF. 2. Disconnect the cable from the terminal 3 on the Outdoor unit terminal strip. (Fig. 6) 1 2 3 Indoor Unit Fig. 6 1. Turn ON the power and operate the system using the remote controller or the operation button on the indoor unit. 2.
8-4. Trouble Diagnosis of Fan Motor 8-4-1. Indoor Fan Motor This indoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil resistance, and the following procedure should be used to check the motor. To perform diagnosis, operate the unit in cooling mode with indoor fan speed "High". Next, make sure that the indoor unit receive the signals from the remote controller when the ON/OFF operation button is pressed.
8-4-2. Outdoor Fan Motor This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil resistance, and the following procedure should be used to check the motor. Perform the trouble diagnosis by Test Run mode described on Installation Instructions of indoor unit. Important: (A) Turn OFF the power before connecting or disconnecting the motor connectors.
8-5. Noise Malfunction and Electromagnetic Interference An inverter A/C operates using pulse signal control and high frequencies. Therefore, it is susceptible to the effects of external noise, and is likely to cause electromagnetic interference with nearby wireless devices. A noise filter is installed for ordinary use, preventing these problems. However, depending on the installation conditions, these effects may still occur. Please pay attention to the points listed below.
9. CHECKING ELECTRICAL COMPONENTS Ground wire 9-1. Measurement of Insulation Resistance Clip The insulation is in good condition if the resistance exceeds 1M ohm. Probe 9-1-1. Power Supply Cord Insulation tester Clamp the grounding wire of power cord with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the two power wires. (Fig. 1) Then also measure the resistance between the grounding and other power terminals. (Fig. 1) Fig.
9-2. Checking Continuity of Fuse on PCB Ass'y Fuse Remove the PCB Ass'y from the electrical component box. Then pull out the fuse from the PCB Ass'y. (Fig. 5) Check for continuity using a multimeter as shown in Fig. 6. PCB Ass'y Fig. 5 Fuse Fig.
10. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT 10-1. Characteristics of New Refrigerant R410A 10-1-1. What is New Refrigerant R410A? R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture. Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant, R22. 10-1-2. Components (mixing proportions) HFC32 (50%) / HFC125 (50%) 10-1-3.
10-2. Checklist before Servicing Use a clutch-type flare tool for R410A or the conventional flare tool. Note that sizes of the resultant flares differ between these two tools. Where a conventional flare tool is used, make sure to observe A Specification (amount of extrusion) by using the flare spacer. Specification A Diameter of tube D Flare tool for R410A Conventional flare tool (for R22) Dia.3/8" (9.52 mm) 0 to 0.0196" 0.0472" Dia.1/2" (12.7 mm) (0 to 0.5 mm) (1.2 mm) Dia.1/4" (6.35 mm) Dia.
10-3. Tools Specifically for R410A For servicing, use the following tools for R410A Tool Distinction Tool Name Gauge manifold Charging hose Gas leak detector Refrigerant cylinder Charging cylinder Refrigerant recovery unit Tools specifically for R410A Vacuum pump with anti-reverse flow (*1) (Solenoid valve-installed type, which prevents oil from flowing back into the unit when the power is off, is recommended.) Vacuum pump (*2)...can be used if the following adapter is attached.
10-5. In Case of Compressor Malfunction CAUTION Should the compressor malfunction, be sure to make the switch to a replacement compressor as quickly as possible. Use only the tools indicated exclusively for R410A. for R410A." See "10-3. Tools Specifically 10-5-1. Procedure for Replacing Compressor (1) Recovering refrigerant Any remaining refrigerant inside the unit should not be released to the atmosphere, but recovered using the refrigerant recovery unit for R410A.
Configuration and characteristics of cylinders (5) Recharging Valve Be sure to charge the specified amount of refrigerant in liquid state using the service port of the wide tube service valve. The proper amount is listed on the unit's nameplate. When the entire amount cannot be charged all at once, charge gradually while operating the unit in Cooling Operation. CAUTION Liquid Never charge a large amount of liquid refrigerant at once to the unit. This may cause damage to the compressor.
10-6. In Case Refrigerant is Leaking CAUTION Never attempt to charge additional refrigerant when refrigerant has been leaking from the unit. Follow the procedure described below to locate points of leaks and carry out repairs, then recharge the refrigerant. (1) Detecting Leaks Use the detector for R410A to locate refrigerant leak points.
10-7. Charging Additional Refrigerant 10-7-1. When Tubes are Extended Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit. Charge additional refrigerant in liquid state only. CAUTION Never charge additional refrigerant if refrigerant is leaking from the unit. Follow instructions given in "10-6. In Case Refrigerant is Leaking" and completely carry out repairs. Only then should you recharge the refrigerant. 10-8.
APPENDIX A Operating Instructions CS-KE30NKU + CU-KE30NKU CS-KE36NKU + CU-KE36NKU (852-6-4181-221-00-2) A-1
Operating Instructions Split System Air Conditioner Model No. Indoor Units Outdoor Units CS-KE30NKU CS-KE36NKU CU-KE30NKU CU-KE36NKU This air conditioner uses the refrigerant R410A. Before operating the unit, read these operating instructions thoroughly and keep them for future reference.
FEATURES This air conditioner is an inverter type unit that automatically adjusts capability as appropriate. Details on these functions are provided below; refer to these descriptions when using the air conditioner. • Automatic Switching between Cooling and Heating • Microprocessor Controlled Operation The interior compartment of the remote controller contains several features to facilitate automatic operation, easy logically displayed for easy use.
INSTALLATION LOCATION • We recommend that this air conditioner be installed properly by qualified installation technicians in accordance with the Installation Instructions provided with the unit. • Before installation, check that the voltage of the electric supply in your home or office is the same as the voltage shown on the nameplate. • Do not install this air conditioner where there are fumes or flammable gases, or in an extremely humid space such as a greenhouse.
NAMES OF PARTS Air Intakes INDOOR UNIT UNIT DISPLAY AND OPERATION BUTTON INDOOR UNIT OPERATION lamp TIMER lamp REMOTE CONTROL receiver Air Outlet Remote Controller Drain Hose Refrigerant Tubes OPERATION button (ON/OFF) OUTDOOR UNIT IMPORTANT Avoid using radio equipment such as mobile phone near (within 4 ft. (1.2 m)) the remote control receiver. Some radio equipment may cause malfunction of the unit. If the trouble happens, disconnect power and restart the air conditioner after a few minutes.
REMOTE CONTROLLER (DISPLAY) Displayed when transmitting data Displayed when setting temperature Displayed when indoor unit sensor is in use Displayed when temperature is shown Displayed when setting timer Symbols (1) Operation mode (4) Timer AUTO ..................................... 24-hour clock with ON/OFF program Timer ....................... HEAT ...................................... ON Timer. .............................. MILD DRY .............................. OFF Timer. .................
REMOTE CONTROLLER Transmitter When you press the buttons on the remote controller, the mark appears in the display to transmit the setting changes to the receiver in the air conditioner. Display Information on the operating conditions is displayed while the remote controller is switched on. If the unit is turned off, FLAP setting and FAN SPEED setting are not displayed. QUIET button : When you press this button, the fan rotates slower than the fan speed setting to provide a quieter operating sound.
Sensor A temperature sensor inside the remote controller senses the room temperature. ON/OFF operation button This button is for turning the air conditioner on and off. 1 HR. TIMER button (1-HOUR OFF TIMER) : When you press this button, regardless of whether the unit is operating or stopping, the unit operates for one hour and then shuts down. Temperature setting buttons (TEMP.) Press the button to increase the set temperature. Press the button to reduce the set temperature.
USING THE REMOTE CONTROLLER HOW TO INSTALL BATTERIES HOW TO USE THE REMOTE CONTROLLER When using the remote controller, always point the unit’s transmitter head directly at the air conditioner’s receiver. Air Conditioner (Indoor unit) Receiver ACL button Remote Controller (Transmitter head) 1. Slide the cover in the direction indicated by the arrow and remove it. 2. Install two AAA alkaline batteries. Make sure the batteries point in the direction marked in the battery compartment. 3.
OPERATION WITH THE REMOTE CONTROLLER 1. Automatic Operation 2. Manual Operation This unit automatically switches between cooling operation and heating operation according to the difference between the room temperature and the temperature setting. STEP 2 STEP 3 STEP 1 STEP 2 STEP 4 STEP 5 NOTE If the automatic operation settings of the unit do not meet your needs, press the setting buttons as described below and change the settings as desired.
3. Adjusting the Fan Speed A. In Cooling and DRY Mode: ( A. Automatic fan speed Simply set the FAN SPEED selector button to the position. This automatically sets the best fan speed for the room temperature. B.
7. HIGH POWER Mode HIGH POWER mode can be used to increase the output of the indoor unit for all operation modes except automatic operation. Press the HIGH POWER button while unit is operating. The mark appears in the display. To cancel, press HIGH POWER button again. • When the HIGH POWER button is pressed, the unit operates at maximum output for 30 minutes, regardless of the desired temperature. The fan speed is 1 step above “High”.
A. In Heating Mode: ( SPECIAL REMARKS ) (1) When the room temperature drops below 46°F, Heating Operation will begin. (2) When the room temperature rises to above 53°F, Heating Operation will stop. The above actions will repeat so that the room temperature is maintained at about 50°F. Room Temperature (°F) 53 (2) 50 46 • Once the room temperature reaches the level that was set, the unit’s operation frequency is changed automatically.
SETTING THE TIMER 2. How to set the OFF time (Example) To stop the air conditioner at 11:00 am. Operation 1. Press the OFF TIME setting button once. Indication The timer indication is displayed, and the present OFF time is shown. 2. Press the Advance, Return NOTE In the descriptions below, the following settings are used for the temperature and time indicator selector button on the bottom front section of the remote controller.
USING THE 1-HOUR OFF TIMER 4. How to set daily ON/OFF repeat timer (Example) To start operation at 7:10 am. and stop the air conditioner at 11:00 am. 1. 1-Hour OFF Timer 10:30 pm. Present time 7:10 am. ON Operation 1. Set the timer ON/OFF times as shown in 2-1, 2, 3 and 3-1, 2, 3. 11:00 am. OFF Indication The present time 10:30 pm. and are displayed. NOTE • The ON/OFF combination timer uses the current time as the reference, and it is activated starting from whichever set time comes first.
ADJUSTING THE AIRFLOW DIRECTION CAUTION 1. Horizontal The horizontal airflow can be adjusted by moving the vertical vanes with your hands to the left or right. • Use the FLAP button on the remote controller to adjust the position of the flap. If you move the flap by hand, the flap position according to the remote controller and the actual flap position may no longer match.
CARE AND CLEANING 1. For safety, be sure to turn the air conditioner off and also to disconnect the power before cleaning. 2. Do not pour water on the indoor unit to clean it. This will damage the internal components and cause an electric shock hazard. How to replace the filter 1. Insert the top of the filter, and then secure the bottom of the filter with the protrusions on the unit. 2.
TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or service center. Trouble Air conditioner does not run at all. Possible Cause Remedy 1. Power failure. 1. Restore power. 2. Leakage circuit breaker tripped. 2. Contact service center.
SPECIFICATIONS Model No. Power Source Cooling Capacity Heating Capacity kW BTU/h kW BTU/h Cooling Outdoor (Hi) dB(A) Operation Operation Indoor(H/M/L) Sound Heating Outdoor (Hi) dB(A) Operation Indoor(H/M/L) Unit Dimensions (H×W×D) inch(mm) (Indoor unit : Include panel) lbs.(kg) Net Weight Model No.
APPENDIX B INSTALLATION INSTRUCTIONS CS-KE30NKU + CU-KE30NKU CS-KE36NKU + CU-KE36NKU (852-6-4190-587-00-0) A-2
INSTALLATION INSTRUCTIONS Split System Air Conditioner $/09 (08 *54+0:054,8 ;9,9 :/, 8,-80.,8(4: " NOTE >:,84(2 +0(3,:,8 5- 9,8<0*, 658: " Contents Page IMPORTANT! Please Read Before Starting .................................. 2 Model Combinations 1. GENERAL .......................................................... 4 1-1. Tools Required for Installation (not supplied) 1-2. Accessories Supplied with Unit 1-3. Optional Copper Tubing Kit 1-4.
IMPORTANT! Please Read Before Starting When Transporting Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers. This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.
Others 8VH WKH IODUH PHWKRG IRU FRQQHFWLQJ WXELQJ $SSO\ UHIULJHUDQW OXEULFDQW WR WKH PDWFKLQJ VXUIDFHV RI the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leakfree connection. CAUTION &KHFN FDUHIXOO\ IRU OHDNV EHIRUH VWDUWLQJ WKH WHVW UXQ 9HQWLODWH DQ\ HQFORVHG DUHDV ZKHQ LQVWDOOLQJ RU WHVWLQJ the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas.
1. General 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instructions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning. 1-1. Tools Required for Installation (not supplied) 1. Standard screwdriver 2. Phillips head screwdriver 3. Knife or wire stripper 4. Tape measure 5.
1-5. Additional Materials Required for Installation 1. 2. Indoor unit Refrigeration (armored) tape Insulated staples or clamps for connecting wire (See local codes.) Putty Refrigeration lubricant Clamps or saddles to secure refrigerant tubing 3. 4. 5. Drain hose 2. Installation Site Selection Outside drainage 2-1. Indoor Unit Fig.
2-2. Outdoor Unit NO AVOID: Heat source DO: Outdoor unit choose a place as cool as possible. choose a place that is well ventilated. install in a location where at least two sides are unobstructed, so that the flow of air at the intake port or exhaust port is not blocked, and so that sufficient space is ensured for maintenance to be carried out without trouble. In general the top also must be unobstructed. (Fig.
2-2-1. Installing the Unit in an Area with High Winds and in a Snowy Area 4 25*(:0549 =0:/ /0./ =04+9 ( =04+ 6855- +;*: 08 +09*/(8., 9/5;2+ ), -0::,+ (4+ +08,*: ,>659;8, :5 :/, =04+ 9/5;2+ ), (<50+,+ (9 3;*/ (9 65990)2, 0. , 08E +09*/(8., 4 8,.0549 =0:/ 90.40-0*(4: 945=-(22 :/, 5;:+558 ;40: 9/5;2+ ), 685<0+,+ =0:/ ( 62(:-583 (4+ 945= 6855- +;*: 0. - 08 +09*/(8., Countermeasures against snow and wind 4 8,.0549 =0:/ 945= (4+ 9:854. =04+ :/, -5225=04.
2-2-3.
Required space around the outdoor unit - :/, =04+ 6855- +;*: 09 ;9,+ :/, 96(*, 9/5=4 ),25= 3;9: ), 9,*;8,+ (85;4+ :/, 5;:+558 ;40: - :/, ;40: 09 ;9,+ =0:/5;: :/, 8,7;08,+ 96(*, ( 685:,*:0<, +,<0*, 3(? (*:0<(:, 68,<,4:04. :/, ;40: -853 56,8(:04. 04 58 358, 04 58 358, #04.
2-2-4.
Reference diagram for snow-proof duct Space requirements for setting CU-KE30NKU, CU-KE36NKU with STK-BDV80E [Obstacle to the front of unit] [Obstacle to the rear of unit] $56 09 56,4 $56 09 56,4 #04.2, ;40: 049:(22(:054 04 58 358, 04 58 358, 04 58 358, #04.
[Obstacles to the front and rear of unit] $/, :56 (4+ )5:/ 90+,9 3;9: 8,3(04 56,4 0:/,8 :/, 5)9:(*2, :5 :/, -854: 58 :/, 5)9:(*2, :5 :/, 8,(8 3;9: ), 45 :(22,8 :/(4 :/, /,0./: 5- :/, 5;:+558 ;40: 04 58 358, 04 58 358, 04 58 358, #04.
3. How to Install the Indoor Unit 3-1. Remove the Rear Panel from the Unit (1) Remove and discard the set screw on the rear panel. (Fig. 6) (2) Press the 2 marks on the frame cover and disengage the stationary tabs from the frame. (Fig. 7a) Set screw only for transportation Fig. 6 (3) Remove the rear panel by grasping the sections shown in Fig. 7b and pulling it in the direction shown by the arrow. Rear panel NOTE Tubing can be extended in 6 directions as shown in Fig. 8.
(4) Using a sabre saw, key hole saw or hole-cutting drill attachment, cut a hole in the wall. See Table 4 and Fig. 10. NOTE Hole should be made at a slight downward slant to the outdoor side. Table 4 Indoor side Hole Dia. Outdoor side 3-5/32" (80 mm) (5) Measure the thickness of the wall from the inside edge to the outside edge and cut PVC pipe at a slight angle 1/4" (6 mm) shorter than the thickness of the wall. (Fig. 11) Fig.
Front panel 3-4. Removing and Installing the Grille Arm Basically, these models can be installed and wired without removing the grille. If access to any internal part is needed, follow the steps as given below. How to remove the grille (1) Open the front panel until it is nearly horizontal, grasp the sections near the front panel arms on both sides, and then remove the panel by pushing the arms towards the outside while pulling the panel towards you.
3-5. Shape the Indoor Side Tubing (1) Arrangement of tubing by direction 8(3, a) Right or left tubing Cut out the corner of the right/left frame with a hacksaw or the like. (Figs. 20 and 21) ,-: :;)04. 5;:2,: b) Right-rear or left-rear tubing In this case, the corner of the frame need not be cut. (2) To mount the indoor unit on the rear panel: Fig. 20 Hang the 3 mounting slots of the unit on the upper tabs of the rear panel. (Fig. 22) Frame 3-6.
3-7. Wire Size and Length Regulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Carefully observe these regulations when carrying out the installation. NOTE Refer to the wiring system diagram (Fig. 23) for the meaning of (A), (B), and (C) in Table 5. Refer to your local codes or in the absence of local codes see the National Electric Code: ANSI/NFPA70.
3-8. Wiring Instructions for Inter-unit Connections (1) Insert the inter-unit wiring (according to local codes) into the through-the-wall PVC pipe. Run the wiring toward the indoor side allowing approx. 10" (25 cm) to extend from the wall face. (Fig. 24) ",(8 6(4,2 '(22 2(9:0* *5<,8 (2) Grasp both ends of the front panel, push the arms towards the outside, and remove the front panel by opening it towards the front and pulling it towards you.
WARNING Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist. Therefore, be sure all wiring is tightly connected. When connecting each power wire to the corresponding terminal, follow the instructions “How to connect wiring to the terminal” and fasten the wire securely tight with the fixing screw of the terminal plate. STRIP SIZE How to connect wiring to the terminal 9/32" (7 mm) (ACTUAL SIZE) a) For Indoor Unit Fig.
3-9. Mounting (1) To install the indoor unit, mount the indoor unit onto the 3 tabs on the upper part of the rear plate. (2) Hold down the air discharge outlet and press the lower part of the indoor unit until it clicks to securely fasten to the 2 tabs on the lower part of the rear plate. (Fig. 33) Push NOTE For tubing, choose either the right or left tubing direction and follow the steps below. Also, extend the support on the back of the indoor unit as a stand to make your work easier. (Fig. 34) Fig.
Left-side tubing (1) Lead the tubing and drain hose through the wall, allowing sufficient length for connection. Then bend the tubing using a tube bender to make the attachment. (Fig. 38) Rear panel Hole in wall (2) Switch the drain hose and drain cap. Switching drain hose and drain cap Bent part (a) Locate the drain hose and the drain cap. (Fig. 39) Narrow tube Wide tube Fig. 38 (b) Remove the screw fastening the drain hose on the right side, and pull out the drain hose to remove it. (Fig.
To unmount indoor unit Press the 2 marks on the lower part of the indoor unit and unlatch the tabs. Then lift the indoor unit and unmount. (Fig. 42) 3-10. Frame Fastening Method (1) Remove the screw cover on the bottom surface. (Fig. 43) (2) Fasten the frame to the rear panel using the 2 supplied tapping screws 5/32" x 13/32" (4 x 10 mm). (Fig. 43) NOTE Push Under normal conditions, the installation design calls for a less than 3/32" (2 mm) gap between the air conditioner unit and the wall.
4. How to Install the Outdoor Unit 496,*:054 6(4,2 First refer to Section 2. Installation Site Selection. 4-1. Wiring Instructions for the Outdoor Unit Regulations on wire size differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Make sure that the installation fully complies with all local and national regulations. #*8,= (1) Remove the 3 screws from the inspection panel. (Fig.
5. Refrigerant Tubing Deburring After Before 5-1. Use of the Flaring Method Many of the conventional split system air conditioners employ the flaring method to connect refrigerant tubes which run between indoor and outdoor units. In this method, the copper tubes are flared at each end and connected with flare nuts. 5-2. Flaring Procedure with a Flare Tool (1) Cut the copper tube to the required length with a tube cutter. It is recommended to cut approx.
5-4. Connecting Tubing between Indoor and Outdoor Units a) b) Torque wrench Tightly connect the indoor side refrigerant tubing extended from the wall with the outdoor side tubing. (Fig. 52) Spanner Indoor unit To fasten the flare nuts, apply specified torque as: Table 6 Outdoor unit Tube Dia. Nut Tightening Torque 1/4" (6.35 mm) 21/32" (17 mm) Approx. 120 – 160 lbs·in (140 – 180 kgf·cm) 3/8" (9.52 mm) 7/8" (22 mm) Approx. 300 – 360 lbs·in (340 – 420 kgf·cm) 1/2" (12.
6. Air Purging Indoor unit Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. Therefore, they must be purged completely.
(5) With the vacuum pump still running, close the “Lo” knob of the manifold valve. Then stop the vacuum pump. 90 (1/4 turn) Vacuum hose to manifold valve (6) With the hex wrench, turn the valve stem on the narrow tube service valve counter-clockwise by 90 degrees (1/4 turn) for 10 seconds, and then turn the stem clockwise to close it again. (Fig. 58) CAUTION Hex wrench Be sure to completely insert the hex wrench before attempting to turn the valve.
How to Test Run the Air Conditioner After turning on the power of the air conditioner, use the remote controller and follow the steps below to conduct the test run. (1) Set the remote controller in Test Run mode. (Fig. 59a) a) Press and hold the QUIET button and the 1HR. TIMER button. b) Then press and hold the ACL (Reset) button with a pointed object such as the tip of a pen. After 5 seconds, release the ACL button first. !% $ );::54 c) Then release the QUIET and 1HR. TIMER buttons.
Basic Functions of the Service Valves The basic functions of the service valves are given in Table 8 below. Table 8 Narrow Tube Service Valve (2-Way) Action Wide Tube Service Valve (3-Way) O-ring CLOSED Valve cap Stem Shipping Fully OPEN Operating and test running the air conditioner Fully OPEN Measuring pressure * and gas charging CLOSED Air purging with * The service port on the wide tube service valve uses a Schrader core valve to access the refrigerant system.
Service Valve Connections ( $,3658(8? *544,*:054 #*8,= 04 @ :;849 )? /(4+ 0. * ) $5 -(9:,4 :/, -2(8, 4;:9 (662? 96,*0-0,+ :587;, (9 $()2, (4+ 0. + $587;, =8,4*/ Table 9 Tube Dia. Nut Fig. 60c Tightening Torque 1/4" (6.35 mm) 21/32" (17 mm) Approx. 120 – 160 lbs·in (140 – 180 kgf·cm) 3/8" (9.52 mm) 7/8" (22 mm) Approx. 300 – 360 lbs·in (340 – 420 kgf·cm) 1/2" (12.70 mm) 1-1/32" (26 mm) Approx. 430 – 480 lbs·in (490 – 550 kgf·cm) 5/8" (15.
8. Address Switch Tab 8-1. Address Setting of the Remote Controller The address can be set in order to prevent interference between remote controllers when 2 indoor units are installed near each other. The address is normally set to “A.” To set a different address, it is necessary to change the address on the second remote controller. Fig. 62 NOTE Once changed, you cannot restore the original address setting of the air conditioner. (1) Switch on the power source.
DC1111-0
