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Panasonic CS-KS18NB4UW Service Manual

1. ACIN2 W 0 CONTROLLER TO INDOOR UNIT COIL COMP M DARE _ OOODO naan SUPPLY YEL YEL BLK BLK x O LLI z z HIGH PRESSURE SWITCH FERRITE PNK CORE BLK EZ 111213141516 MCN 11218141516 2P CONECTOR WHT OUT DOOR THERMISTOR THERMISTOR COMPRESSOR THERMISTOR COIL 7P CONNECTOR WHT MAGNETIC COIL 6 2 FAN MOTOR COMPRESSOR OVERLOAD RELAY MOTOR OLR ELEC SYSTEM ASSY 2P CONNECTOR BLK 8FA2 5251 12300 2 37 Outdoor Unit CU KS18NKU CU KS18NKUA REACTANCE BLK POWER RELAY I i 2P CONNECTOR FERRITE CORE CONTROLLER lt A C I oc O LLI 2 2 9 a COMPRESSOR THERMISTOR OUT DOOR THERMISTOR THERMISTOR 7P CONNECTOR WHT HIGH PRESSURE SWITCH DE BK 4 5 MAGNETIC COIL 212 BLK COMPRESSOR OVERLOAD RELAY FAN MOTOR OLR WHT WHT ELEC SYSTEM ASSY WHT WHT 2P CONNECTOR RED JJ 8FA2 5251 12000 2 38 7 7 1 Address Setting of the Remote Controller The address can be set in order to prevent interference between remote controllers when two indoor units are installed near each other The a
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3. Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value 29 5 2 Cooling Capacity Indoor Unit CS KS12NB41 amp CZ 18BT1U Outdoor Unit CU KS12NK1A Power Supply 115V Single Phase 60Hz Cooling Capacity RATING CAPACITY 11 900 BTU h AIR FLOW RATE 235 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F L 105 115 Hem 3 R 9 Soe 4 Ge 0 40 6 46 1 72 22 2 i i 76 24 4 80 26 7 84 28 9 88 31 1 72 22 2 76 24 4 80 26 7 84 28 9 88 31 1 11 900 12 222 5 520 76 24 4 80 26 7 84 28 9 88 31 1 72 22 2 76 24 4 80 26 7 84 28 9 88 31 1 76 24 4 80 26 7 84 28 9 88 31 1 6 700 6 660 6 610 6 570 6 020 5 100 Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h NOTE 1 Rating conditions Indoor Unit Entering Air Temp 80 F 26 7 C DB 67 F 19 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 30 Indoor Unit CS KS18NB4UW 4 CZ 18BT1U Outdoor Unit CU KS18NKU or CU KS18NKUA Power Supply 230V Single Phase 60Hz lt Cooling Capacity gt
4. RATING CAPACITY 17 500 BTU h AIR FLOW RATE 341 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F 105 115 hi 3 TA 9 5 4 Eon 0 40 6 46 1 72 22 2 76 24 4 80 26 7 84 28 9 88 31 1 72 22 2 76 24 4 80 26 7 84 28 9 88 31 1 72 22 2 76 24 4 80 26 7 84 28 9 88 31 1 12 22 2 i 76 24 4 80 26 7 84 28 9 88 31 1 63 2 67 A 71 7 76 24 4 80 26 7 84 28 9 88 31 1 Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 1 Rating conditions Indoor Unit Entering Air Temp 80 F 26 7 C DB 67 F 19 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 31 5 3 Cooling Capacity Low Ambient Indoor Unit CS KS12NB41 amp CZ 18BT1U Outdoor Unit CU KS12NK1A Power Supply 115V Single Phase 60Hz Cooling Capacity Low Ambient gt RATING CAPACITY 11 900 BTU h AIR FLOW RATE 235 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP CO Si gt es Fa 72 22 2 i 76 24 4 84 28 9 88 31 1 84 28 9 88 31 1 Total Cooling Capacity BTU h SHC Sensible Heat Ca
5. 12V Coil Resistance Ohm Each Pair of Terminal 380 7 Ambient Temp 77 F 25 C DATA SUBJECT TO CHANGE WITHOUT NOTICE 18 2 2 2 Outdoor Unit Outdoor Unit CU KS18NKU Control PCB CB CU KS18NKU Control Circuit Fuse 250V 25A Compressor DC Twin Rotary Hermetic Compressor Model Nominal Output 1 050W Compressor Oil Amount Pints cc FV50S 0 74 350 Coil Resistance Ambient Temp 68 F 20 CH Ohm Safety Device 5 Compressor Discharge Temp Control es es Operation cutoff control in abnormal ambient Temp Overload Relay Model CS 7L115 Operation Temp Open 239 F 115 C Close 203 F 95 C Run Capacitor Micro Es VAC Crankcase Heater Propeller Q ty Dia inch mm 1 016 17 32 D420 Coil Resistance RED WHT 77 5 Ambient Temp 68 F 20 C WHT BLU 77 5 BLU RED 77 5 Type Internal Controller Over Current Protection Yes Run Capacitor VAC sys Heat Exchanger Coil Fins per inch Face Area ft m External Finish __ Acrylic baked on enamel finish DATA SUBJECT TO CHANGE WITHOUT NOTICE Outdoor Unit CU KS12NK1A Control PCB CB CU KS12NK1A Control Circuit Fuse 125V 25 Compressor DC Rotary Hermetic Compressor Model Nominal Output G4CO90LU1ER 900W Compressor Oil Amount Pints cc FV50S 0 68 320 Coil Resistance Ambient Temp 68 F 20 CH Ohm Saf
6. 46 Indoor fan speed High fan 60Hz 115V 1 Low pressure performance chart psig MPaG Low pressure at wide tube service valve Outdoor inlet air DB So F C 2 Operating current performance chart Operating current A 77 86 95 25 30 35 Outdoor inlet air DB temp F C 3 Indoor discharge air performance chart III E or Air Temp ti T EZ T EST I rete eno T 30 Gei Outdoor inlet air DB temp F C Indo 2740 SR Indoor discharge air temperature F C NOTE ee E R Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value 28 Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKU or CU KS18NKUA Cooling Characteristics RH 46 Indoor fan speed High fan 60Hz 230V 1 Low pressure performance chart psig MPaG Low pressure at wide tube service valve 86 95 25 30 35 40 Outdoor inlet air DB temp F C 2 Operating current performance chart E Operating current A 77 86 95 104 25 30 35 40 Outdoor inlet air DB temp F C 3 Indoor discharge air performance chart Seege Inn RES RE Indoor discharge air temperature F C SL UI E 25 30 35 Outdoor inlet air DB temp F C E NOTE
7. Internal Controller Over Current Protection Yes Run Capacitor VAC sys Heat Exchanger Coil Fins per inch Face Area ft m External Finish __ Acrylic baked on enamel finish DATA SUBJECT TO CHANGE WITHOUT NOTICE 2 3 Other Component Specifications CS KS12NB41 amp CZ 18BT1U CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKU CU KS12NK1A CU KS18NKUA Indoor Unit Indoor air temp sensor Model KTEC 35 S98 gt Resistance ohm 59 68 15 20 25 30 85 Temperature F C 77 86 95 10 40 22 e Indoor heat exchanger sensor Model PT2M 51H S3 Compressor temp sensor CU KS12NK1A Model DTN TKS274Y TH2 CU KS18NKU CU KS18NKUA Model DTN TKS293B Resistance k ohm 4 pila eee es 32 50 68 86 104 122 140 158 176 194 0 10 20 30 40 50 60 70 80 90 gt Temperature F C Outdoor air temp sensor CU KS12NK1A Model DTN TKS269B CU KS18NKU CU KS18NKUA Model TKS295B Outdoor heat exchanger sensor CU KS12NK1A Model DTN TKS274Y TH1 CU KS18NKU CU KS18NKUA Model TKS292B A LLL LL LL Resistance ohm 14 23 32 41 20 15 10 5 0 5 10 15 20 Temperature F C 3 DIMENSIONAL DATA CS KS12NB41 amp CZ 18BT1U Indoor Unit CS KS18NB4UW amp CZ 18BT1U eq 1 HUN pue jeued
8. Phase 60Hz Total Capacity BTU h 11 900 3 000 to 11 900 kW 35 0 9 to 3 5 Sensible Capacity BTU h Air Circulation Hi Me Lo ft min m h 235 399 206 350 194 330 Power Input W Power Factor 8 1 ER BTU h Performance ER BTU W Electrical Rating Fuse or Circuit Breaker Capacity Controls Temperature Control Microprocessor Thermister Control Unit Wireless Remote Control Unit Timer 24 Hour ON or OFF Timer 1 Hour OFF Timer Airflow Direction Indoor Horizontal Fan Speeds Indoor Outdoor Auto and 3 steps Auto Hi and multi steps Vertical 100 7 Compressor Locked Rotor Amperes 7 Hi Operation Sound Indoor Hi Me Lo dB A Outdoor Hi dB A 4 Refrigerant Tubing Connections Refrigerant Narrow tube Tid mm Tube Diameter Wide tube inch mm 11 Indoor Unit CS KS12NB41 amp CZ 18BT1U Outdoor Unit CU KS12NK1A Individual Unit Indoor Unit Dimensions amp Weight Indoor Unit Body Panel CS KS12NB41 amp CZ 18BT1U CS KS12NB41 CZ 18BT1U Unit Dimensions Height ee 290 4 V8 105 e 24 13 16 630 26 3 16 665 22 7 28 48 714 26 11 16 678 Weight Net Ib kg o Shipping Volume cuft m ______ ___________4 59 0 13 Outdoor Unit CU KS12NK1A Unit Dimensions Height 21 9 16 548 28 11 32 720 10 7 16 265 9664 Package Dimensions Height Package Dimensions Height Dimensions amp Weight Ou
9. Select a separate power source A C and A C wiring or the picture is distorted Keep the A C and A C wiring at least 1 meter 2 The antenna cable for a television or 2 Static occurs in the radio sound away from wireless devices and antenna cables radio is located close to the A C and A C wiring 3 Locations where television and radio signals are weak Change the wireless device s antenna to a high sensitivity antenna Change the antenna cable to a BS coaxial cable Use a noise filter for the wireless device Use a signal booster 59 10 CHECKING ELECTRICAL COMPONENTS 10 1 Measurement of Insulation Resistance The insulation is in good condition if the resistance exceeds 1M ohm 10 1 1 Power Supply Cord 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 10 1 2 Indoor Unit Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw on the terminal plate Fig 2 Note that the ground line terminal should be skipped for the check 10 1 3 Outdoor Unit Clamp a metallic part of the unit with the lead clip of the insulation resistance tester and measure the resistanc
10. 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 9 2 Method of Self Diagnostics Clock display gt Follow the procedure below to perform detailed trouble diagnostics al Test run mode Self diagnostics mode 1 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 FJ Oe Lr LN EN OFF 2 The failure mode is stored in memory even when the power is not ON Follow the procedure below to perform diagnostics PROCEDURE ON OFF After turning on power to the air conditioner use the remote controller and operation follow the steps below to execute self diagnostics Mw button Step 1 Press and hold the remote controller HIGH POWER button and 1 HIGH POWER HR TIMER button Then press and hold the ACL reset button button with a pointed object such as the tip of a pen After 5 seconds EMP 1HR release ACL button first then release HIGH POWER and 1 HR TIMER TIMER buttons oP 1 test run appears blinking in the remote button controller clock display area FANSPEED Step 2 Next press the 1 HR TIMER button once to change the display from oP 1 to oP 3 self diagnostics The display continues to FLAP NIGHT SETBACK blink
11. 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 1 Noise malfunction This refers to the application of high frequency noise to the signal wires resulting in abnormal signal pulses and malfunction 1 Locations near broadcast stations where Either of the following trouble may occur The fundamental concept is to make the 1 The unit may stop suddenly during there are strong electromagnetic waves system less susceptible to noise 2 Locations near amateur radio short wave operation Insulate for noise or stations 2 Indicator lamps may flicker distance from the noise source 3 Locations near electronic sewing machines 1 Use shielded wires and arc welding machines 2 Move unit away from the noise source 2 Electromagnetic interference This refers to noise generated by high speed switching of the microcomputer and compressor This noise radiates through space and returns to the electric wiring affecting any wireless devices televisions radios etc located nearby 1 A television or radio is located near the 1 Noise appears in the television picture 1
12. system using the remote controller or the operation button on the indoor unit Perform the self diagnosis five seconds after the operation Start Condition E01 What is the latest self diagnosis result Defect in the outdoor unit P C board Condition E12 Outdoor Unit Turn off the power and wait until the power lamp LED of the outdoor unit controller is turned OFF Disconnect the cable from the terminal 3 on the indoor unit terminal strip Fig 7 Indoor Unit Fig 7 Turn ON the power and operate the system using the remote controller or the operation button on the indoor unit Perform the self diagnosis five seconds after the operation Start Condition E01 What is the latest self diagnosis result 2 Defect in ue inter unit cable Condition E12 Defect in the indoor unit P C board 56 9 4 Trouble Diagnosis of Fan Motor 9 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 Important A Turn OFF the power before connecting or disconnecting the motor connectors B When performing voltage measurement at the in
13. 16 2 Refer to the installation instructions for recovery of refrigerant or removal of the power cable or tubing 7 3 6 Remove the main body lower section 1 Remove the 4 screws Fig 16 2 Remove the 2 screws Fig 17 3 Disconnect the connector 6P in the power box Fig 18 4 Lift the main body lower section and remove it from the main body upper section Screw Screw Drain cap Main body lower section Main body lower section Screw p d Screw Fig 16 FR Main body lower section N SE Q Main body el upper section 62 N 9 ES A Screw Fig 17 Fig 18 45 7 3 7 Remove the heat exchanger sensor 1 Remove the heat exchanger sensor from the sensor holder Fig 19 Heat exchanger sensor Holder Fig 19 7 3 8 Remove the drain pump and float switch 1 Remove the 2 screws Fig 20 2 Loosen the clamp and disconnect the drain hose from the drain pump Fig 20 3 Remove the drain pump from the main body upper section Fig 20 4 Remove a nut and remove the float switch Fig 21 Drain pump Float switch Drain hose Clamp Fig 20 Fig 21 46 7 3 9 Remove the turbo fan and fan motor 1 Remove a nut and remove the turbo fan Fig 22 2 Remove the 2 screws and 3 nuts and remove the fan motor Fig 23 Turbo fan Nut Fan motor Fig 22 Fig 23 7 3 10 Remove the heat exchanger 1 Remove the 3 sc
14. D HEAT EXCHANGER TEMP CIRCUIT AT TERMINAL PRESS FIT LOCATION 502 SENSOR TROUBLE 3 I D PCB FAILURE I D INDOOR COMPRESSOR TEMP SENSOR 1 OPEN OR SHORT CIRCUIT IN SENSOR 504 TROUBLE 2 POOR CONTACT AT CONNECTOR OR OPEN CIRCUIT AT TERMINAL PRESS FIT LOCATION S05 eee TEMP 3 O D PCB FAILURE O D OUTDOOR 506 O D AIR TEMP SENSOR TROUBLE 507 O D CURRENT SENSOR ERROR O D PCB FAILURE 1 D O D COMMUNICATION 1 MIS WIRING 2 AC POWER FAILURE 3 BLOWN FUSE E01 TROUBLE 4 POWER RELAY FAILURE 5 OR O D PCB FAILURE SERIAL COMMUNICATION 6 O D FAN MOTOR FAILURE 7 REACTOR FAILURE TROUBLE HIGH PRESSURE SW FAILURE 9 OLR FAILURE 10 MAGNETIC COIL FAILURE HIC OR POWER TR FAILURE 2 O D FAN NOT OPERATING Eoo HIC CIRCUIT TROUBLE INSTANTANEOUS POWER STOPPAGE 4 SERVICE VALVE NOT OPENED POWER TR CIRCUIT TROUBLE O D FAN BLOCKED 6 CONTINUOUS OVERLOAD OPERATION COMPRESSOR FAILURE 8 O D PCB FAILURE poa UNIT EXTERNAL ROM 1 EXTERNAL ROM DATA FAILURE 2 O D PCB FAILURE TROUBLE 1 INSTANTANEOUS POWER STOPPAGE 2 OR POWER TR FAILURE E04 CURRENT PEAK CUT 3 O D PCB FAILURE N OT o Eos PAM CIRCUIT TROUBLE 1 O D PCB FAILURE ACTIVE CIRCUIT TROUBLE 2 O D POWER VOLTAGE TROUBLE COMPRESSOR 1 ELECTRIC EXPANSION VALVE FAILURE 2 CHOKED CAPILLARY TUBE E06 DISCHARGE TEMP 3 INSUFFICIENT GAS 4 CONTINUO
15. NSTRUCTIONS 1 4 1 A 4 CZ RD515U 1 OPERATING RANGE Models CS KS18NB4UW amp CZ 18BT1U CU KS18NKU Temperature _ Indoor Air Intake Temp Outdoor Air Intake Temp 67 F DB 57 F WB 67 DB Models CS KS12NB41 amp CZ 18BT1U CU KS12NK1A CS KS18NB4UW amp CZ 18BT1U CU KS18NKUA Temperature _ Indoor Air Intake Temp Outdoor Air Intake Temp 95 F DB 71 F WB 115 F DB Cooling 2 SPECIFICATIONS 2 1 Unit Specifications 2 1 1 Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKU lt 230V gt Voltage Rating 230V Single Phase 60Hz Total Capacity BTU h 17 500 4 000 to 17 500 kW 915 1 2to 5 15 Sensible Capacity BTU h Air Circulation Hi Me Lo ft min m h 341 579 294 500 253 430 Power Input W Power Factor ER BTU h ER BTU W 15 Electrical Rating Compressor Locked Rotor Amperes 17 5 Fuse or Circuit Breaker Capacity Controls Temperature Control Control Unit Timer Fan Speeds Indoor Outdoor Airflow Direction Indoor Horizontal Vertical DC Twin Rotary Inverter Air Filter Washable Anti Mold Refrigerant Amount charged at shipment Ibs g R410A 2 87 1 300 Refrigerant Control Electric Expansion Valve Operation Sound Indoor Hi Me Lo dB A 44 40 36 Outdoor Hi dB A 5 Refrigerant Tubing Connections Refrige
16. Step 3 Finally press the ON OFF button to engage self diagnostics mode e The self diagnostics function utilizes the 3 indicator lamps on the main TIMER 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 C Self diagnostics is completed when the buzzer sounds 3 short beeps CANCEL A maximum of 3 self diagnostics reports are displayed for 5 seconds ACE each beginning with the most recent report Following this display the gw M l 2 lamps turn OFF order to view the self diagnostics results again press the ON OFF button again The 3 lamps remain OFF if no trouble has occurred 4 A WS lt IMPORTANT gt 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 51 1 Self diagnostics Lamps OPERATION button OPERATION lamp TIMER lamp HIGH POWER lamp REMOTE CONTROL receiver Since the indications cover various units the corresponding parts listed below may not be present in some models INDICATION ON INDOOR UNIT X BLINKING T ON HIGH TUM CI TIMER G power 7 CODE DIAGNOSIS CONTENTS POSSIBLE MALFUNCTION 1 OPEN OR SHORT CIRCUIT IN SENSOR 501 ROOM TEMP SENSOR TROUBLE 2 POOR CONTACT AT CONNECTOR OR OPEN I
17. TECHNICAL amp SERVICE MANUAL Panasonic CS KS12NB41 amp CZ 18BT1U CU KS12NK1A CS KS18NB4UW amp CZ 18BT1U CU KS18NKU CS KS18NB4UW amp CZ 18BT1U CU KS18NKUA DC INVERTER SPLIT SYSTEM AIR CONDITIONER product Code No Body Panel Body Panel CS KS12NB41 CZ 18BT1U 1 852 361 04 1 852 361 15 CU KS12NK1A 1 852 361 16 CS KS18NB4UW CZ 18BT1U 1 852 361 06 1 852 361 15 CU KS18NKUA 1 852 361 19 CS KS12NB41 Body amp CZ 18BT1U Panel CS KS18NB4UW Body amp CZ 18BT1U Panel CU KS18NKU Wired Remote Controller RAT CU KS18NKUA Option REFERENCE NO 700879 N SAFETY PRECAUTIONS Before doing repair work please read the N SAFETY PRECAUTIONS carefully and fully understand them The precautionary items here are divided into A Warning and A 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 A Warning table However even precautionary items identified as NCaution 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 A This symbol indicates items to which we need to pay attention In this triangle a definite precautionary item is described Q This sy
18. US OVERLOAD OPERATION OVERHEATING PREVENTION 5 O D FAN NOT OPERATING 6 O D PCB FAILURE 1 FAN MOTOR FAILURE 2 CONNECTOR CONTACT FAILURE 2 OPERATION TROUBLE 3 D PCB FAILURE 4 WAY VALVE SWITCHING 1 4 WAY VALVE FAILURE HEAT PUMP MODEL ONLY Eos TROUBLE 2 op PCB FAILURE ZERO CROSS TROUBLE iK E09 GAS LOSS PREVENTION 1 SERVICE VALVE NOT OPENED 2 INSUFFICIENT GAS DC COMPRESSOR DRIVE E10 CIRCUIT TROUBLE _ 1 OPEN PHASE 2 O D PCB FAILURE E11 1 FAN MOTOR FAILURE 2 CONNECTOR CONTACT FAILURE O D DC FAN OPERATION TROUBLE 3 PCB FAILURE O D SYSTEM COMM FAILURE MIS WIRING 2 BLOWN FUSE OPEN PHASE O D FREEZING COMPRESSOR FAILURE E12 OLR OPERATION O D POWER POWER RELAY FAILURE 4 O D PCB FAILURE af x sexe es beef eje pepe x x fel a bbc BLINKING 3 SEC INTERVAL FLOAT SWICTH FS IS ACTIVED 1 DRAIN PUMP FAILURE 2 FS FAILURE 3 CHOKED DRAIN HOSE 8512 5261 99100 1 52 2 If the self diagnostics function fails to operate No indicators illuminate and the Check the indoor unit indoor fan does not rotate e Check the power voltage Blown Is the fuse blown Normal Replace the circuit Replace the controller board or the fuse 9 3 Checking the Indoor and Outdoor Units 1 Checking the indoor unit 2 Check tems unit operation Use the r
19. ananaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 2 SPECIFICATIONS 2 1 Unit Specifications 2 2 Major Component Specifications 2 3 Other Component Specifications 2 3 DIMENSIONAL 4 REFRIGERANT FLOW DIAGRAM 4 1 Refrigerant Flow Diagram 5 PERFORMANCE DATA 5 1 Temperature Charts buen MED o WOT met ee eee 5 3 Cooling Capacity Low Ambient a ante 6 ELECTRICAL DATA 232016 Eet 6 2 Electric Wiring Diagrams ENNEN 7 MAINTENANCE 7 1 Address Setting of the Remote Control 7 2 Disconnecting and Connecting Positive Connector for Outdoor Unit 7 3 Disassembly Procedure 8 FUNCTIONS 8 1 Operation Functions 8 2 Protective Functions 9 TROUBLESHOOTING BEFORE CALLING FOR SERVICE 9 1 Precautions before Performing Inspection or Repair 9 2 Method of EE RE el Led 9 3 Checking the Indoor and Outdoor Units mentre inneke ennen ether 9 4 Trouble Diagnosis OF Fan Motor 9 5 Noise Malfunc
20. as to the atmosphere recover residual refrigerant using the refrigerant recovery unit for R410A instead Do not reuse the recovered refrigerant because its composition will have been altered 3 Welding leaking points Confirm again that no residual refrigerant exists in the unit before starting welding Weld securely using flux and wax for R410A Prevent oxide film from forming inside the tubes utilizing substitution with nitrogen N2 in the refrigerant circuit of the unit Leave ends of tubes open during welding 4 Checking for sealing Use nitrogen gas for the pressurized gas and never use a refrigerant other than R410A Also do not use oxygen or any flammable gas 5 Evacuation Use a solenoid valve installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption the valve will prevent the pump oil from flowing back The equipment may be damaged if moisture remains in the tubing thus carry out the evacuation thoroughly When using a vacuum pump with exhaust air volume more than 0 883 cu ft min and ultimate vacuum pressure rate of 50 micron Hg Standard time for evacuation 1 Detect leaks OK 2 Recover refrigerant OK 3 Weld leaking points OK 4 Check for sealing OK 5 Evacuation OK 6 Recharge Length of tubing Less than 33 ft 10 m More than 33 ft 10 m More than 10 minutes More than 15 min
21. ating Voltage 7 Nominal Output Ambient Temp 68 F 20 C Type Internal Controller es Over Current Protection Over Heat Protection Run Capacitor Moart VAC 44 022 O O Drain Pump Model Q ty PLD 12115ST 1 1 Rating Voltage Hz AC115V 60Hz Input W Coil Resistance Ohm 101 10 Ambient Temp 68 F 20 C Safty Device Type Thermal Fuse Open F 293 145 Heat Exchanger Coil DATA SUBJECT TO CHANGE WITHOUT NOTICE Indoor Unit Panel CZ 18BT1U Flap Motor Stepping Motor Model Q ty MP24ZN 12V 2 DC 12V Coil Resistance Ohm Each Pair of Terminal 380 7 Ambient Temp 77 F 25 C DATA SUBJECT TO CHANGE WITHOUT NOTICE 17 Indoor Unit Body CS KS18NB4UW Control PCB CB CS KS18NB4U Control Circuit Fuse 250V 3A Q ty Dia and Length inch mm 1 012 5 8 L5 3 4 D322 L147 NoofPoes 8 Ohm Coil Resistance Ambient Temp 68 F 20 C Type Internal Controller Over Current Protection Tes 0 Over Heat Protection es Run Capacitor Mie 1771 222 Drain Pump Model Q ty PLD 12230ST 1 1 Rating Voltage Hz ege Sg to 240V 60Hz Input 108 8 Coil Resistance 333 10 Ambient Temp 68 F 20 C Safty Device Type Thermal Fuse Open F C 293 145 Heat Exchanger Coil DATA SUBJECT TO CHANGE WITHOUT NOTICE Indoor Unit Panel CZ 18BT1U Flap Motor Stepping Motor Model Q ty MP24ZN 12V 2 DC
22. 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 1 4 6 35 mm 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 5 8 15 88 mm e Size of flare Flare tool for R410A Conventional flare tool R22 e Tubing precautions Refrigerant R410A is more easily affected by dust or moisture compared with R22 thus be sure to temporarily cover the ends of the tubing with caps or tape prior to installation Never use 0 0276 0 7 mm thick copper tubing or tubing which is less than 0 0315 0 8 mm in thickness since air conditioners with R410A are subject to higher pressure than those using R22 and R407C e No addition of compressor oil for R410A No additional charge of compressor oil is permitted e No use of refrigerant other than R410A Never use a refrigerant other than R410A If refrigerant R410A is exposed to fire Through welding etc toxic gas may be released when R410A refrigerant is exposed to fire Therefore be sure to provide ample ventilation during installation work e Caution in case of R410A leak Check for possible leak points with the special leak detector for R410A If a leak occurs inside th
23. ddress is normally set to A To set a different address it is necessary to change the address on the second remote controller NOTE Once changed you cannot restore the original address setting of the air conditioner 1 Switch on the power source 2 Break the address setting tab marked A on the second remote controller to change the address Fig 1 When the tab is removed the address is automatically set to B Fig 2 3 Press and hold the remote controller HIGH POWER button and 1 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 HIGH POWER and 1 HR TIMER buttons oP 1 test run appears blinking in the remote controller clock display area 4 Each time the 1 HR TIMER button is pressed the display changes as shown below Press this button 2 times to change the display to 7 address setting Fig 3 b Test run mode 7 3 Self diagnostic mode KS ur a U 4 Address setting mode den 5 oP 7 has now been selected for address setting 6 Press the ON OFF operation button on the remote controller Fig 3 Check that the signal received sound is heard from the second indoor unit approximately 5 times The sound you hear is the signal that the remote controller address has been changed 7 Finall
24. door controller connector for 3 in the table below the DC motor will trip and voltage output will stop approximately 1 minute after operation is started For this reason to measure the voltage again turn OFF the unit once using the remote controller and then start the air conditioner again Trouble symptom 1 The fan does not stop when the unit stops Indoor unit controller trouble Trouble symptom 2 The fan motor does not rotate when the unit is operating Diagnostic procedure Disconnect the motor connectors and measure the voltage at the DC motor connectors on the indoor unit controller 3 locations Measurement location CS KS12NB41 CS KS18NB4UW 1 Vm Gnd Between pin 1 and pin DC 130V to 195V DC 280V to 340V 2 Vcc Gnd Between pin 4 and pin 3 DC 15V 10 3 Vs Gnd Between pin 5 and pin 3 Fluctuation between DC 1 8V to 5 7V Diagnostic results All of the above measured values are normal Fan motor trouble Replace the motor Any one of the above measured values is not normal Indoor unit controller trouble Replace the controller Reference DC motor connector pin arrangement Pin 1 Vm red Pin 2 Not used Pin 3 Gnd black Pin 4 Vcc white Pin 5 Vs yellow Pin 6 PG blue Trouble symptom 3 Motor rotates for some time several seconds but then quickly stops when the indoor unit operates There is trouble in the system that provides feedback of motor rotation speed from the mot
25. door heat exchanger temperature F C Area Automatic capacity control When the temperature drops below Point A the operation frequency is reduced by a certain proportion Area Frequency increase is prohibited 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 models only The Freeze Prevention Control during the Low Ambient Cooling Mode outside air temperature 59 F 15 C or lower is as follows he compressor stops when the temperature of indoor heat exchanger becomes less than 36 F 2 C The compressor restarts when the temperature of indoor heat exchanger becomes 46 F 8 C or higher 50 H 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 214 101 Approx 2 Area Automatic capacity control When the temperature rises above Point A the operation frequency is reduced at a specified rate Area Further frequency increase is prohibited When the temperature falls below Point B preve
26. e by placing a probe on each terminal screw where power supply lines are connected on the terminal plate Fig 2 10 1 4 Measurement of Insulation Resistance for Electrical Parts Disconnect the lead wires of the desired electric part from terminal plate capacitor etc Similarly disconnect the connector Then measure the insulation resistance Figs 3 and 4 Refer to Electric Wiring Diagram the probe cannot enter the poles because the hole is too narrow then use a probe with a thinner pin 60 Ground wire Probe Insulation tester Fig 1 Terminal plate ele 5 Clip lt Insulation tube or tester metallic part S tube or metallic part Insulation tester Fig 3 From fan motor compressor and other parts ps ye Metallic Clip o S Fn Insulation tester Fig 4 10 2 Checking Continuity of Fuse on Ass y dias e Remove the PCB Ass y from the electrical component box Then pull out the fuse from the PCB Ass y Fig 5 e Check for continuity using a multimeter as shown in PCB Ass y Fig 6 c Fig 5 Fuse Fig 6 61 11 REFRIGERANT SPECIAL PRECAUTIONS WHEN SERVICING UNIT 11 1 Characteristics of New Refrigerant R410A 11 1 1 What is New Refrigerant R410A R410A is a new refrigerant that contains two types of pseudo no
27. e 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 Refer to Method of Self Diagnostics for the self diagnostics procedure Operation Timer High Power gt 3 Off D Lo iK Blinking D Muminated Before the Operation For terminal strip short circuit work or inter unit wiring removal turn off the power to N WARNING avoid an electric shock Release the terminal strip short circuit after the completion of self diagnostics Do not perform the short circuit work between any other terminals except for N CAUTION specified ones on the specified terminal strip If such work is performed between the incorrect terminals the unit might be broken ircui lt Convenient Tool for Short Circuit Work for example gt t gt Alligator Clip Alligator Clip rr J J lt Check Items before Troubleshooting Serial Communication Start gt After confirming that the following errors do not exist start the Troubleshooting Serial Communication in Condition E01 and E12 Mis wiring inter unit cable etc 6 Reactor failure defective insulation etc AC
28. e room immediately provide thorough ventilation 63 11 3 Tools Specifically R410A For servicing use the following tools for R410A 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 e Vacuum pump 2 can be used if the following adapter is attached e Vacuum pump adapter reverse flow prevention adapter 3 Solenoid valve installed adapter attached to a conventional vacuum pump Electronic scale for charging refrigerant Flare tool Bender Tools which can be com Torque wrench monly used for R22 R407C and R410A Cutter reamer Welding tool nitrogen gas cylinder AN The above tools specifically for R410A must not be used for R22 and R407C Doing so will cause malfunction of the unit For the above vacuum pump 1 2 and vacuum pump adapter 3 those for R22 type units can be used for R410A type However they must be used exclusively for R410A and never alternately with R22 and R407C To prevent other refrigerants R22 R407C from being mistakenly charged to this unit shape and external diameter of the service port screw has been altered lt External diameter of service port gt R410A 5 16 R22 R407C 1 4 11 4 Tubing Instal
29. emote controller to operate the he rated voltage must be present between inter unit wirings 1 and 2 unit in TEST run mode To determine Connect a 5 k ohm resistor between inter unit wirings 2 and 3 When the whether the mode is currently in voltage at both ends is measured approximately 12 to 15V DC must TEST run mode check the 3 indicator be output and the multimeter pointer must bounce once every 8 lamps on the unit If all 3 are blinking seconds the current mode is TEST run Or instead of measuring the voltage you can insert an LED jig and check that the LED flickers once every 8 seconds If there are no problems with the above then check the outdoor unit For the Test run procedure refer to the Appendix B Installation Instructions 2 Checking the outdoor unit N Check items unit operation 1 Apply the rated voltage between outdoor e The control panel LED red must illuminate unit terminals L and N 2 Short circuit the outdoor unit COM terminal The compressor fan motor and 4 way valve must all turn on to the T RUN terminal f there are no problems with the above then check the indoor unit Using the TEST T RUN terminals TEST T RUN terminals T RUN Test run compressor and fan motor turn ON TEST MV Compresses time to 1 60th accelerates operation by 60 times faster than normal 53 3 Serial Communication Error Identification Procedure If th
30. erate the system using the remote controller or the operation button on the indoor unit Fig 3 Perform the self diagnosis five seconds after the operation start Condition E12 Defect in the outdoor unit di 2 What is the latest self diagnosis result 7 PC board Condition E01 Outdoor Unit Outdoor Unit Turn off the power and wait until the power lamp LED of the outdoor unit controller is turned OFF Remove the short circuit between the terminals 2 and 3 on the outdoor unit terminal strip Disconnect the cable from the terminal 3 on the indoor unit terminal strip Fig 4 Indoor Unit Indoor Unit Short circuit between the terminals 2 and 3 on the indoor unit Fig 4 Fig 5 terminal board Fig 5 1 Turn ON the power and operate the system using the remote controller or the operation button on the indoor unit 2 Perform the self diagnosis five seconds after the operation start Condition E12 Defect or connection error What is the latest self diagnosis result in the inter unit cable Condition E01 Defect in the indoor unit P C board 55 3 2 Condition E12 Troubleshooting Serial Communication Outdoor Unit Turn off the power and wait until the power lamp LED of the outdoor unit controller is turned OFF Disconnect the cable from the terminal 3 on the Outdoor unit terminal strip Fig 6 Indoor Unit Fig 6 Turn ON the power and operate the
31. ety Device 5 Compressor Discharge Temp Control es es Operation cutoff control in abnormal ambient Temp Overload Relay Model CS 7L115 Operation Temp Open 239 F 115 C Close 203 F 95 C Run Capacitor Micro Es VAC Crankcase Heater 115V 20W Propeller Q ty Dia inch mm 1 015 3 4 D400 Coil Resistance RED WHT 77 5 Ambient Temp 68 F 20 C WHT BLU 77 5 BLU RED 77 5 Type Internal Controller Over Current Protection Yes Run Capacitor VAC sys Heat Exchanger Coil Fins par inch Face Area External __ Acrylic baked on enamel finish DATA SUBJECT TO CHANGE WITHOUT NOTICE Outdoor Unit CU KS18NKUA Control PCB CB CU KS18NKUA Control Circuit Fuse 250V 25A Compressor DC Twin Rotary Hermetic Compressor Model Nominal Output 1 050W Compressor Oil Amount Pints cc FV50S 0 74 350 Coil Resistance Ambient Temp 68 F 20 CH Ohm Safety Device 5 Compressor Discharge Temp Control es es Operation cutoff control in abnormal ambient Temp Overload Relay Model CS 7L115 Operation Temp Open 239 F 115 C Close 203 F 95 C Run Capacitor Micro Es VAC Crankcase Heater Propeller Q ty Dia inch mm 1 016 17 32 D420 Coil Resistance RED WHT 77 5 Ambient Temp 68 F 20 C WHT BLU 77 5 BLU RED 77 5 Type
32. f 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 S 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 S Prohibit After repairs make sure to measure the insulation resistance and confirm that the value is 1 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 Table of Contents NSAFETY PRECAUTIONS nnen nennen sanne TABLE OF CONTENTS 1 aaa 1 OPERATING RANGE 2aannaaaaanaaaaaaaaaaaaaaaaaaaaaaanaaaa
33. frigerant Amount charged at shipment 05 g R410A 2 87 1 300 Features Operation Sound Indoor Hi Me Lo dB A Outdoor Hi dB A 51 Refrigerant Tubing Connections Refrigerant Narrow tube inch mm 1 4 6 35 mm Tube Diameter Wide tube inch mm 1 2 12 7 Wired Remote Controller Option CZ RD515U 15 Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKUA lt 208V gt Individual Unit Indoor Unit Dimensions amp Weight Indoor Unit CS KS18NB4UW amp CZ 18BT1U CS KS18NB4UW CZ 18BT1U Unit Dimensions Height Package Dimensions Height ee 290 4 178 105 22 2 124 13 116 630 26 3 16 665 ______ 1281 8 714 26 11 16 678 Weight Net Ib kg D Shipping Volume cuft m ______ ___________4 59 0 13 Outdoor Unit CU KS18NKUA 11 7 32 285 Dimensions amp Weight Outdoor Unit Unit Dimensions Height Package Dimensions Height Weight Net Ib kg Shipping Ib kg Shipping Volume cu ft m 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 75 F WB 16 2 2 Major Component Specifications 2 2 1 Indoor Unit Indoor Unit Body CS KS12NB41 Control PCB CB CS KS12NB4U Control Circuit Fuse 250V 3A Q ty Dia and Length inch mm 1 D12 5 8 L5 3 4 D322 L147 R
34. lation Procedures When the tubes are connected always apply HAB oil on the flare portions to improve the sealing of tubing The following is the HAB oil generally used Esso ZERICE 532 For details on tubing installation procedures refer to the installation manuals attached to the indoor unit and outdoor unit 64 11 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 gt See 11 3 Tools Specifically for R410A 11 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 Do not reuse the recovered refrigerant since it will contain impurities 2 Replacing Compressor Soon after removing seals of both discharge and suction tubes of the new compressor replace it quickly 3 Checking for sealing Use nitrogen gas for the pressurized gas and never use a refrigerant other than R410A Also do not use oxygen or any flammable gas 4 Evacuation Use solenoid valve installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption the valve will prevent the pump oil from flowing back The equipment may be damaged if moist
35. le If air or other contaminants mix with the gas pressure will become extremely high in the refrigerating cycle Prohibit 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 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 Do not wash the air conditioner with water as this may cause an electric shock or fire N 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 I
36. mbol indicates the item to be prohibited In or close to this circle a prohibited item is described o 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 N 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 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 elect
37. mensions Height Package Dimensions Height ee 290 4 178 105 22 2 124 13 116 630 26 3 16 665 ______ 1281 8 714 26 11 16 678 Weight Net Ib kg D Shipping Volume cuft m ______ ___________4 59 0 13 Outdoor Unit CU KS18NKUA 11 7 32 285 Dimensions amp Weight Outdoor Unit Unit Dimensions Height Package Dimensions Height Weight Net Ib kg Shipping Ib kg Shipping Volume cu ft m 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 75 F WB 14 2 1 5 Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKUA lt 208V gt Voltage Rating 208V Single Phase 60Hz Total Capacity BTU h 17 500 4 000 to 17 500 kW 5 15 120515 Sensible Capacity BTU Latent Capacity BTU Air Circulation Hi Me Lo ft min m3 h 341 579 294 500 253 430 Moisture Removal High Pints Available Voltage Range Running Amperes Power Input Power Factor BTU h W BTU W 15 Performance 2 A m m Electrical Rating gt Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity Controls Temperature Control Control Uni Timer Fan Speeds indoor Outdoor Airflow Direction Indoor Horizontal Vertical DC Twin Rotary Inverter Air Filter Washable Anti Mold Re
38. n azeotropic refrigerant mixture Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant R22 11 1 2 Components mixing proportions HFC32 50 125 50 11 1 3 Characteristics e Less toxic more chemically stable refrigerant e composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase Thus when there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in composition of the remaining refrigerant Therefore do not add new refrigerant Instead recover the remaining refrigerant with the refrigerant recovery unit Then after evacuation totally recharge the specified amount of refrigerant with the new refrigerant at its normal mixed composition state in liquid phase When refrigerant R410A is used the composition will differ depending on whether it is in gaseous or liquid phase and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in gaseous state Thus always charge the refrigerant while it is in liquid phase Neen Ether type oil is used for compressor oil for R410A type units which is different from the mineral oil used for R22 Thus more attention to moisture prevention and faster replacement work compared with conventional models are required 62 11 2 Checklist before Servicing Use a clutch type flare tool for R410A or the
39. ntion 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 120 C due to shortage of gas or other reason 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 auto matically to control the electrical current for operation e When the cause of the increase in electrical current is rectified the system will resume operation in the original mode lt CS KS12NB41 gt A lt CS KS18NB4UW gt A Zee ry 9 TROUBLESHOOTING BEFORE CALLING FOR SERVICE 9 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 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
40. o a unit requiring 1 68 Ib 0 76 Kg using a capacity of a 22 Ib 10 Kg cylinder the minimum necessary amount for the cylinder is 1 68 22 x 0 20 6 08 Ib 0 76 10 x 0 20 2 76 Kg For the remaining refrigerant refer to the instructions of the refrigerant manufacturer If using a charging cylinder transfer the specified amount of liquid refrigerant from the refrigerant cylinder to the charging cylinder Prepare an evacuated charging cylinder beforehand CAUTION To prevent the composition of R410A from changing never bleed the refrigerant gas into the atmosphere while transferring the refrigerant Fig 3 Do not use the refrigerant if the amount in the charging cylinder is less than 2096 66 Configuration and characteristics of cylinders Valve Single valve Charge liquid refrigerant with cylinder in up side down position Fig 1 Single valve with siphon tube Charge with cylinder in normal position Fig 2 L Charging cylinder Refrigerant cylinder Fig 3 11 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 2 Recovering refrigerant Never release the g
41. onnect power before attempting to disassemble the unit When a footstool etc is used for disassembling the indoor unit be careful not to fall down If you fall down you might be injured seriously 7 3 1 Remove the air intake grill 1 Slide the 2 latches each to the corresponding arrow direction Fig 1 and Fig 2 Open downward the air intake grill located on the latch side 2 Undo the air intake grill drop preventive hook Fig 3 Undo the 2 hinges for the grill and remove the air intake grill Latch Latch Air intake grill Hinge Fig 1 Fig 2 Fig 3 7 3 2 Disconnect the connectors in the control box 1 Remove the 2 screws and remove the control box cover Fig 4 2 Disconnect the connectors 4 FLAP CN12 RC and CN13 7P Fig 5 Control PCboard CN13 CN12 Screw Control box cover Fig 4 Fig 5 41 7 3 3 Remove the ceiling panel 1 Open the clamp 4 locations and remove the 2 lead wires from the clamps Fig 6 2 Remove the 4 screws fixing the corner cover at 3 locations and indicator cover at 1 location Fig 6 3 Press the center 1 of the cover and remove the cover with the section 2 pulled down Fig 7 4 Remove the strap 3 locations from the hook on the ceiling panel Fig 8 There is no strap on the indicator cover 5 Remove the bolt 4 locations with a washer and remove the ceiling panel Fig 9 Corner cover Lead wire Pull d
42. 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 1 f fluctuation models only The Sensor Dry operation during the Low Ambient Cooling Mode outside air temperature 59 F 15 C or lower is as follows The compressor operates a cycle of 3 minutes ON and 6 minutes OFF repeatedly B PAM o control n order to further improve inverter performance control is switched between PWM control at low operation speeds and PAM control at high operation speeds making the most effective use of power 48 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 1 step above High Frequency 30 min 5 min V End Start NOTE 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 H Lamp colors OPERATION lamp DRY operation COOL operation FAN operation OPERATION lamp TIMER lamp HIGH POWER lamp Timer backup Operation stops if there a
43. or to the indoor unit controller Trouble symptom 4 Fan motor rotation speed does not change during indoor unit operation Trouble symptom 5 Fan motor rotation speed varies excessively during indoor unit operation Remedy for symptom 3 to 5 It is not possible to identify whether the trouble is indoor unit controller trouble or motor trouble Therefore first replace the indoor unit controller then if necessary replace the DC motor 57 9 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 Important A Turn OFF the power before connecting or disconnecting the motor connectors B When performing voltage measurement at the outdoor controller connector for 3 in the table below the DC motor will trip and voltage output will stop approximately 10 seconds after operation is started For this reason to measure the voltage again first turn OFF the outdoor unit power then measure the voltage in Test Run mode Trouble symptom 1 The fan does not stop when the outdoor unit stops Outdoor unit controller trouble Trouble symptom 2 The fan motor does not rotate when the outdoor unit is operating Diagnostic procedure Disconnect the motor connectors and measure the voltage at the DC m
44. otor connectors on the outdoor unit controller 3 locations Measurement location 1 Vs Gnd Between pin 1 and pin 4 DC 110V or more 2 Vcc Gnd Between pin 5 and pin A DC 14V or more 3 Vsp Gnd Between pin 7 and pin 4 After fluctuating 4 times between DC 1 0 to 4 3V 1 sec ON and DC 0 V 1 sec OFF the DC motor trips Diagnostic results All of the above measured values are normal Fan motor trouble Replace the motor Any one of the above measured values is not normal 2 Outdoor unit controller trouble Replace the controller Reference DC motor connector pin arrangement Pin 1 Vs white Pin 2 Not used Pin 3 Not used Pin 4 Gnd black Pin 5 Vcc red Pin 6 FG blue Pin 7 Vsp yellow Trouble symptom 3 Motor rotates for some time several seconds but then quickly stops when the outdoor unit operates There is trouble in the system that provides feedback of motor rotation speed from the motor to the outdoor unit controller Trouble symptom 4 Fan motor rotation speed does not change during outdoor unit operation Trouble symptom 5 Fan motor rotation speed varies excessively during outdoor unit operation Remedy for symptom 3 to 5 It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble Therefore first replace the outdoor unit controller then if necessary replace the DC motor 58 9 5 Noise Malfunction and Electromagnetic Interference An
45. own 8 section 2 Indicator cover Center 1 Corner cover Corner cover Fig 7 Bolt Strap Remove the strap from the hook Bolt Fig 8 Fig 9 42 7 3 4 Remove the indoor air temperature sensor 1 Disconnect the connector CNO8 ROOM 2P in the control box and remove the indoor air temperature sensor Fig 10 Indoor air temperature sensor CNO8 mE r 222 2 19 10 7 3 5 Remove the power box and control box 1 Remove a screw and remove the terminal cover Fig 11 2 Remove the 2 screws and remove the power box cover Fig 11 3 Disconnect the power lines No 1 and No 2 signal line No 3 and ground cable from the terminals in the power box Fig 12 Screw Power box cover Terminal Ground cable Power lines Signal line 4 Disconnect the connector 7 DP 2P in the power box Fig 13 Remove a screw and disconnect the ground cable Fig 13 Screw CNO3 Screw For the removal of the following components perform any work after removing the indoor unit main body from the ceiling Main body lower section Heat exchanger sensor Drain pump Float switch e Turbo fan e Fan motor e Heat exchanger 1 Perform the work after draining the water to prevent the water leakage from the drain pan Put a bucket etc under the drain cap and remove the drain cap to drain the water Fig
46. pacity BTU h NOTE 1 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 32 Indoor Unit CS KS18NB4UW 4 CZ 18BT1U Outdoor Unit CU KS18NKUA Power Supply 230V Single Phase 60Hz lt Cooling Capacity Low Ambient gt RATING CAPACITY 17 500 BTU h AIR FLOW RATE 341 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F C SH gt Lara 72 222 9 800 76 24 4 80 26 7 84 28 9 88 31 1 72 22 2 i 76 24 4 80 26 7 84 28 9 88 31 1 72 22 2 i 76 24 4 80 26 7 84 28 9 88 31 1 13 600 12 199 2 4 630 76 24 4 80 26 7 84 28 9 88 31 1 13 440 N 76 24 4 4 170 80 26 7 84 28 9 88 31 1 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h NOTE 1 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 33 6 ELECTRICAL DATA 6 1 Electrical Characteristics Indoor Unit CS KS12NB41 amp CZ 18BT1U Outdoor Unit CU KS12NK1A Cooling Indoor Unit O
47. power failure 7 High Pressure Switch failure Blown fuse 8 Overload Relay failure Power Relay failure 9 Magnetic Coil failure defective insulation short circuit etc Outdoor Fan Motor failure defective insulation etc 10 Compressor failure defective insulation etc 3 1 Condition E01 Troubleshooting Serial Communication Outdoor Unit Indoor Unit _ M Fig 1 Fig 2 Is the voltage of about DC12V or more given between the terminals 2 and 3 on the outdoor unit terminal strip Serial Communication Line Fig 1 1 Turn OFF the power and wait until the power lamp LED No of the outdoor unit controller is turned OFF 2 Disconnect the cable from the terminal 3 on the indoor unit terminal strip Fig 2 3 Turn ON the power Yes A B Continued to the next page A Continued to the next page B 54 Continued from the previous A Continued from the previous page 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 Yes Defect or connection error Defect in the indoor unit in the inter unit cable P C board Outdoor Unit Turn OFF the power and wait until the power lamp LED of the outdoor unit controller is turned OFF Short circuit between the terminals 2 and 3 on the outdoor unit terminal strip Fig 3 Indoor Unit Turn ON the power and op
48. r Fan Motor Compressor P Performance at 208V Single phase 60Hz Rating conditions Running amp 0 16 Power input 22 1 838 1 860 Rating conditions Indoor air temperature 80 F 26 7 C DB 67 F 19 4 C WB Outdoor air temperature 95 F 35 C DB 35 iagrams D iring 6 2 Electric W CS KS12NB41 amp CZ 18BT1U Indoor Unit CS KS18NB4UW amp CZ 18BT1U 00 9 8 13A d L MOO NOOH S4 e t L 1 2 Le le S x HOLIMS LVO HOLSIINH3H L YITIOYLNOI LHM dS LHM dZ LHM dv Ou 2 1 v ele t 211 2 ASSY dWV1 xoa T HM dz L t AAH MOd WMd 2 2 219 lt ITT MOd NMd LZ o s v e e t YITIOYLNOI LHM d9 d 49 k YOLOW NVA NIVHG 8578 TIVNIINH3 L DOO IS OV LOV 3400 5 IHH A LINN OL 36 Outdoor Unit CU KS12NK1A REACTANCE m BLK POWER RELAY 1P CONNECTOR WHT BLK BLK FERRITE CORE 2P CONNECTOR TERMINAL PLATE 25A
49. rant Narrow tube inch mm Tube Diameter Wide tube inch mm Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKU lt 230V gt Individual Unit Indoor Unit Dimensions amp Weight Indoor Unit CS KS18NB4UW amp CZ 18BT1U CS KS18NB4UW CZ 18BT1U Unit Dimensions Height Package Dimensions Height ee 290 4 178 105 22 2 124 13 116 630 26 3 16 665 ______ 1281 8 714 26 11 16 678 Weight Net Ib kg D Shipping Volume cuft m ______ ___________4 59 0 13 Outdoor Unit CU KS18NKU 11 7 32 285 Dimensions amp Weight Outdoor Unit Unit Dimensions Height Package Dimensions Height Weight Net Ib kg Shipping Ib kg Shipping Volume cu ft m 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 75 F WB 2 1 2 Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKU lt 208V gt Voltage Rating 208V Single Phase 60Hz Total Capacity BTU h 17 500 4 000 to 17 500 kW 915 1 2to 5 15 Sensible Capacity BTU h Air Circulation Hi Me Lo ft min m h 341 579 294 500 253 430 Power Input W Performance Power Factor ER BTU h Electrical Rating 17 5 Compressor Locked Rotor Amperes ER BTU W Fuse or Circuit Breaker Capacity 1 Controls Temperature Cont
50. re no operator controls for 25 hours or longer after unit operation switched from OFF to ON by use of ON timer operation 49 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 e COOL and DRY modes When the night setback mode is selected the air conditioner automatically raises the temperature setting 2 F 1 C when 30 minutes have passed after the selection was made and then another 2 F 1 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 2 F 1 C Setting temperature Press the NIGHT SETBACK button 30 30 Time 8 2 Protective Functions ll 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 1 Freeze prevention operation is engaged when the temperature of the indoor heat exchanger is below 43 F 6 C 2 Restart after freeze prevention operation occurs when the temperature of the indoor heat exchanger reaches 46 F 8 C or above In
51. rews Fig 24 2 Remove the 3 screws Fig 25 3 Remove the heat exchanger from the main body upper section with the heat exchanger lifted Heat exchanger Screw Screw Main body upper section Fig 24 Fig 25 47 8 FUNCTIONS 8 1 Operation Functions Emergency operation ll SENSOR DRY Emergency operation is available when the remote During DRY operation the system adjusts the room controller malfunctions has been lost or otherwise temperature and fan speed according to the conditions in the cannot be used room in order to maintain a comfortable room environment To operate the system press the OPERATION button SENSOR DRY operation which is also used as the receiver below the unit display DRY operation is as shown in the figure below Each time this button is pressed the OPERATION lamp changes color to indicate the type of operation Select the desired type of operation Load COOL STOP COOL zone GREEN Lamp Off CL The set temperature 15 4 F 2 C below the detected room temperature in the case of cooling operation Conditions are monitored at all times when the room temperature is below 59 F 15 C The compressor operation frequency varies The indoor fan operates with 1 f fluctuation The compressor operates at a low operating frequency The indoor fan operates with 1 f fluctuation Monitoring operation takes place when the room temperature is below 59 F 15 C
52. ric 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 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 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 Prohibit Prohibit Prohibit Prohibit Prohibit elejere iep If refrigerant gas blows off during the work do not touch the refrigerant gas as it may cause frostbite S 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 cyc
53. rol Control Unit Timer Fan Speeds indoor Outdoor Airflow Direction Indoor Horizontal Vertical DC Twin Rotary Inverter Air Filter Washable Anti Mold Refrigerant Amount charged at shipment lbs g R410A 2 87 1 300 Refrigerant Control Electric Expansion Valve Operation Sound Indoor Hi Me Lo dB A 44 40 36 Outdoor Hi dB A 5 Refrigerant Tubing Connections Refrigerant Narrow tube inch mm Tube Diameter Wide tube inch mm Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKU lt 208V gt Individual Unit Indoor Unit Dimensions amp Weight Indoor Unit CS KS18NB4UW amp CZ 18BT1U CS KS18NB4UW CZ 18BT1U Unit Dimensions Height Package Dimensions Height ee 290 4 178 105 22 2 124 13 116 630 26 3 16 665 ______ 1281 8 714 26 11 16 678 Weight Net Ib kg D Shipping Volume cuft m ______ ___________4 59 0 13 Outdoor Unit CU KS18NKU 11 7 32 285 Dimensions amp Weight Outdoor Unit Unit Dimensions Height Package Dimensions Height Weight Net Ib kg Shipping Ib kg Shipping Volume cu ft m 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 75 F WB 10 2 1 3 Indoor Unit CS KS12NB41 amp CZ 18BT1U Outdoor Unit CU KS12NK1A Voltage Rating 115V Single
54. rvice valve dia 1 4 6 35 28 11 32 720 2 1 8 21 9 16 548 Hu Unit inch mm 852 0 0010 12600 0 24 Outdoor Unit CU KS18NKU CU KS18NKUA 23 15 16 11 17 32 34 21 32 880 5 11 32 T N 15 2 17 32 FS EE 1 13 16 25 2 13 32 Wide tube service valve dia 1 2 12 70 Narrow tube service valve dia 1 4 6 35 Unit inch mm 852 0 0010 13300 0 4 REFRIGERANT FLOW DIAGRAM 4 1 Refrigerant Flow Diagram Indoor Unit CS KS12NB41 amp CZ 18BT1U Outdoor Unit CU KS12NK1A Indoor unit Outdoor unit x x Wide tube service Wide tube valve Accumulator Muffler Heat exchanger Heat exchanger Strainer Electric ube expansion service vave Narrow tube valve Muffler oe nc 6 35 mm M Cooling cycle 26 Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKU CU KS18NKUA Indoor unit Outdoor unit service valve Accumulator Wide tube Muffler 1 2 12 7mm Heat exchanger Heat exchanger D 5 NENON Electric tub expansion e valve service Narrow tube valve IE E Cooling cycle 6 35 mm SS 27 5 PERFORMANCE DATA 5 1 Temperature Charts Indoor Unit CS KS12NB41 amp CZ 18BT1U Outdoor Unit CU KS12NK1A ll Cooling Characteristics RH
55. tdoor Unit 34 3 32 Weight Net Shipping 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 12 2 1 4 Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKUA lt 230V gt Voltage Rating 230V Single Phase 60Hz Total Capacity BTU h 17 500 4 000 to 17 500 kW 915 1 2to 5 15 Sensible Capacity BTU h Air Circulation Hi Me Lo ft min m h 341 579 294 500 253 430 Power Input W Power Factor ER BTU h ER BTU W 15 Electrical Rating Compressor Locked Rotor Amperes 17 5 Fuse or Circuit Breaker Capacity Controls Temperature Control Control Unit Timer Fan Speeds Indoor Outdoor Airflow Direction Indoor Horizontal x Vertical DC Twin Rotary Inverter Air Filter Washable Anti Mold Refrigerant Amount charged at shipment lbs g R410A 2 87 1 300 Refrigerant Control Electric Expansion Valve Operation Sound Indoor Hi Me Lo dB A 44 40 36 Outdoor Hi dB A 5 Refrigerant Tubing Connections Refrigerant Narrow tube inch mm Tube Diameter Wide tube inch mm 13 Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKUA lt 230V gt Individual Unit Indoor Unit Dimensions amp Weight Indoor Unit CS KS18NB4UW amp CZ 18BT1U CS KS18NB4UW CZ 18BT1U Unit Di
56. tion and Electromagnetic Interference Page 10 CHECKING ELECTRICAL COMPONENTS 10 1 Measurement of Insulation Resistance 60 10 2 Checking Continuity of Fuse on PCB ASSYy 61 11 REFRIGERANT R410A SPECIAL PRECAUTIONS WHEN SERVICING UNIT 11 1 Characteristics of New Refrigerant _ 62 11 2 Checklist before 0 vennen 63 11 3 Tools Specifically for ME NOA eens 64 11 4 Tubing Installation Procedures r 64 11 5 In Case of Compressor Malfunction 65 11 6 In Case Refrigerant 4 4 67 11 7 Charging Additional Refrigerant 68 1148 EUS ING oy SUT 68 APPENDIX A Operating Instructions A 1 CS KS12NB41 amp CZ 18BT1U CU KS12NK1A CS KS18NB4UW amp CZ 18BT1U CU KS18NKU CS KS18NB4UW amp CZ 18BT1U CU KS18NKUA APPENDIX INSTALLATION INSTRUCTIONS 2 0 1 2 CS KS12NB41 8 CZ 18BT1U CU KS12NK1A CS KS18NB4UW amp CZ 18BT1U CU KS18NKU CS KS18NB4UW amp CZ 18BT1U CU KS18NKUA APPENDIX Operating Instructions A 3 CZ RD515U APPENDIX D INSTALLATION I
57. ure remains in the tubing thus carry out the evacuation thoroughly When using a vacuum pump with exhaust air volume more than 0 883 cu ft min and ultimate vacuum pressure rate of 50 micron Hg Standard time for evacuation 1 Recover refrigerant OK 2 Replace compressor OK 3 Check for sealing OK 4 Evacuation OK 5 Recharge Length of tubing Less than 33 ft 10 m More than 33 ft 10 m More than 10 minutes More than 15 minutes 65 5 Recharging 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 Never char lar moun CAUTION eve ge arge amount of liquid refrigerant at once to the unit This may cause damage to the compressor When charging with a refrigerant cylinder use an electronic scale for charging refrigerant In this case if the volume of refrigerant in the cylinder becomes less than 20 of the fully charged amount the composition of the refrigerant starts to change Thus do not use the refrigerant if the amount in the charging cylinder is less than 20 Also charge the minimum necessary amount to the charging cylinder before using it to charge the air conditioning unit Example In case of charging refrigerant t
58. utdoor Unit Complete Unit Fan Motor Motor Fan Motor Compressor Performance at 115V Single phase 60Hz Rating conditions Running amp Power input Rating conditions Indoor air temperature 80 F 26 7 C DB 67 F 19 4 C WB Outdoor air temperature 95 F 35 C DB 34 Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKU Cooling lt 230V gt Indoor Unit Outdoor Unit nit Fan Motor Compressor P Performance at 230V Single phase 60Hz Rating conditions Hunning amp Power input 1 838 1 860 Rating conditions Indoor air temperature 80 F 26 7 C DB 67 F 19 4 C WB Outdoor air temperature 95 F 35 C DB Cooling lt 208V gt Indoor Unit Outdoor Unit Complete Unit Fan Motor Compressor Performance at 208V Single phase 60Hz Rating conditions Running amp Power input 1 838 1 860 Rating conditions Indoor air temperature 80 F 26 7 C DB 67 F 19 4 C WB Outdoor air temperature 95 F 35 C DB Indoor Unit CS KS18NB4UW amp CZ 18BT1U Outdoor Unit CU KS18NKUA Cooling lt 230V gt Indoor Unit Outdoor Unit Fan Motor Compressor P Performance at 230V Single phase 60Hz Rating conditions Running amp Power input 1 838 1 860 Rating conditions Indoor air temperature 80 F 26 7 C DB 67 F 19 4 C WB Outdoor air temperature 95 F 35 DB Cooling lt 208V gt Indoor Unit Outdoor Unit Comis Unit Fan Moto
59. utes 6 Recharging Recharge unit in the same manner explained on the previous page 5 Recharging 67 11 7 Charging Additional Refrigerant 11 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 AN CAUTION Never charge additional refrigerant if refrigerant is leaking from the unit Follow instructions given in 11 6 In Case Refrigerant is Leaking and completely carry out repairs Only then should you recharge the refrigerant 11 8 Retro Fitting Existing Systems 11 8 1 Use of Existing Units e Never use new refrigerant R410A for existing units which use R22 This will cause the air conditioner to operate improperly and may result in a hazardous condition 11 8 2 Use of Existing Tubing e If replacing an older unit that used refrigerant R22 with a R410A unit do not use its existing tubing Instead completely new tubing must be used 68
60. y press the remote controller ACL reset button to cancel the blinking oP 7 display Fig 3 Changing of the second remote controller address is now completed 39 ACL button Fig 2 ON OY OFFS AM 0061 000 eos HIGH ON I OFF O POWER NE eed o operation Z button HIGH POWER 1 oO n CLA e button FAN SPEED MODE FLAP NIGHT SETBACK TIMER CD C A w A hd C CANCEL cock C gt ACL SENSOR 12H 4b24H Reset ADR ACL tton Ez A Leao N _ Fig 3 7 2 Disconnecting and Connecting Positive Connector for Outdoor Unit One of the two types of connectors illustrated at left is used Their basic structure is the same for each How to Disconnect Hold the resin connector cover and pull the connector off You cannot disconnect the connector by pulling the wire since it is locked inside Always hold the cover to disconnect See illustration at left For the connector without the resin cover push the lock in the direction of 2 while pulling it off Pull the cover upward How to Connect In order to connect hold the resin cover of the connector and push it in Confirm the click sound for the inside lock When the cover is pulled upward the lock is released with the sequence of 1 and 2 40 7 3 Disassembly Procedure To avoid electrical shock hazard be sure to disc

Panasonic CS-KS18NB4UW Service Manual

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