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Panasonic CU-3KE19NBU Service Manual

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1. p 222222252 2 ES E E EX E 12 Min 6 1 9 cm r Air intake lt FZS2222272 22212 EA EE EZE EE ZE 222222222 S Concrete 22222222222 EE a or equal lt b 5 O Ut 76 Wind Back ANNAN W NUTTY N NM NA AN AN N NW N z NN N WAWWANANN WN WAN NN WAWAN QS I WW i WAN v A QUY p Ms W N Cushion rubber Fig 5e Front Wind Air discharge baffle No air intake baffle required on this side Fig 5f 1 Recommended dimensions of the baffle plates Air Intake Baffle X Ps Fig 5g CU 3KE19NBU i 25 3 16 25 32 1 31 32 150 Dimensions Model 10 5 8 10 5 8 25 64 25 32 19 32 25 7 8 19 64 25 64 5 29 32 25 32 25 32 30 29 32 13 25 32 13 25 32 25 64 31 25 32 19 64 25 64 5 29 32 CU 4KE24NBU 25 3 16 25 32 CU 4KE31NBU Model 150 CU 3KE19NBU 22 1 16 23 1 32 13 25 32 5 29 32 19 9 32 1 3 8 2 5 32 18 5 16 2 3 8 3 11 32 31 32 CU 4KE24NBU CU 4KE31NBU Material to be used Metal plate with corrosion protection treatment Plate thickness 0 0394 to 0 047
2. Heating Characteristics RH 85 Indoor fan speed High fan 230V 60Hz 1 High pressure performance chart psig MPaG High pressure at wide tube service valve 50 5 5 0 5 10 15 20 25 Outdoor air temperature F C 2 Operating current performance chart ee St Operating current A 41 50 59 5 0 5 10 15 20 25 Outdoor air temperature F 3 Indoor discharge air performance chart Indoor discharge air temperature F 41 50 59 6 5 0 5 10 15 20 25 Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 29 Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE18NKU x 1 ll Cooling Characteristics ll Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart ge
3. NHO NYS 1 2 3 4 5 1112131415 1 2 3 4 5 1 213 4 5 MAGNETIC COIL MAGNETIC COIL REACTANCE HOLO3NNOO dz LHM LHM jw 4 o LLI lt SE lt I 1P WHT CONNECTOR CRANKCASE HEATER LHM LHM HO LO3NNOO dz MAGNETIC COIL COIL dau HOLO3NNOO dc CONTROLLER YOLSINYAHL NO COIL 2P CONNECTOR DEFROST VALVE 4WAY VALVE C TH YOLSINYSHL 9 13A LEMA HOLSIINH3H IL YOLSINHYJHL NV HOLSIWH3H MO EXPANSION BOARD 2P CONNECTOR 13A HOLSIINHS3H L MV HOLSINYAHL HOOGLNO HOLIMS dHunssSaud HOIH FAN MOTOR YOLSINYAHL 1109 z n8 j se 3 HOLSIINH3HL HOLO3NNOO d HOSS3HdlNOO OVERLOAD RELAY OLR COMPRESSOR MOTOR 8FA2 5251 11700 1 68 Outdoor Unit CU AKE24NBU COMPRESSOR SP CONNECTOR THERMISTOR ie c RED PNK RED PNK WHT WHT BLU co eo BLU z z I YOLOW HossadudWoo FERRITE u10 AV 13H COIL THERMISTOR YEL HIGH PRESSURE m a SWITCH BLK BLK o o BLK BLK OUTDOOR THERMISTOR AW THERMISTOR DW THERMISTOR 27 AN THERMISTOR
4. 0 6 77 86 95 104 1 5 23 41 0 59 68 77 25 30 35 40 C5 0 6 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 2 Operating current performance chart 2 Operating current performance chart LLL LLL EL Estes ATT titi z SB C a ES 2 41 50 59 68 77 C5 0 5 10 15 20 5 Outdoor air temperature F C Outdoor air temperature F 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart ii lt ra he Indoor air temp G0 Ele 27 C _ LTT T Indoor discharge air temperature F Indoor discharge air temperature F C 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C NOTE This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 49 5 2 Cooling Capacity Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE9NKU
5. The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 42 Outdoor Unit CU 4KE31NBU Indoor Unit CS MKE9NKU x 1 ll Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart psig MPaG Low pressure at wide tube service valv High pressure at wide tube service valv 41 50 59 68 77 C5 6 00 15 20 25 Outdoor air temperature F C Outdoor air temperature F 2 Operating current performance chart 2 Operating current performance chart Operating current A Operating current A 41 50 59 68 77 C5 0 5 10 15 20 5 Outdoor air temperature F C Outdoor air temperature F 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart Indoor discharge air temperature F 41 50 59 68 77 5 10 15 20 25 Outdoor air temperature F Outdoor air temperature F NOTE e This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value
6. 4 BW THERMISTOR DN THERMISTOR i i CW THERMISTOR YEL ew YEL BN THERMISTOR YOLOW HOLO3NNOO dz 2P CONNECTOR BLK w m BLK RED BLK CN THERMISTOR WOO HOLO3NNOO 04450 2P CONNECTOR BLK RED O BLK RED WHT L WHT A AVM 3NT1VA 1SOtid3d SILANSVN NOISNVdX4 LAH 3ATV dd llOHLNOO 9LLJNOVIA H3 V3H JSVOMNVHO na HOLO3NNOO 1HM dL LHM HOLO3NNOO dL OS ails 2P CONNECTOR WHT M nid WHT WHT c OYALVAH 9 AONVLOVAY SILANOVN GRN GRN FERRITE CORE GRN SILANSVN dHOO iP o 5556509058955 ALW1d IVNIAH3 L IVNIAH3 L d chmod so deo aet de 3 D INDOOR C INDOOR B INDOOR A INDOOR 1 i UNIT UNIT UNIT UNIT E TO INDOOR UNIT SUPPLY 8FA2 5251 11500 1 69 Outdoor Unit CU 4KE31NBU AlddflS LINN HOOQNI OL H3MOd LINN LINN HOOQNI Y 8 TERMINAL PLATE TERMINAL PLATE FERRITE CORE 3aliHH3J L im LHM lt LHM LHM LHM LHM HOLO3NNOO dz 1 2 3 4 5 112 3 4 5
7. A 1 m APPLICABLE INDOOR UNITS e Wall Mounted Type CS MKE7NKU CS MKE9NKU CS MKE12NKU CS MKE18NKU CS MKE24NKU Multi Outdoor Unit Y ww ww YES YES YES ES ES ES e Semi Concealed Type CS MKE9NBAU CS MKE12NB4U CS KE12NB4UW amp amp Multi Outdoor Unit CZ 18BT1U CZ 18BT1U CZ 18BT1U 1 OPERATING RANGE Temperature Indoor Air Intake Temp Outdoor Air Intake Temp 95 F DB 71 F WB 115 F DB Cooling w 80 F DB 67 F WB 75 F DB 65 F WB eaun DB WB DB 0 FWB 2 SPECIFICATIONS 2 1 Unit Specifications Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE9NKU x 2 Duct Less Type Rated lt 230V gt Going Total Capacity BTU h 17 000 6 800 to 18 600 23 200 7 800 to 24 800 Lun IT MEE S SensbleCapagy Brum S LatentCapady 2 1707 2 900 e Powerin 5 S PowerFador X EER BTUMWw to 3 8 389 o i Bru 88 Compressor Locked Rotor Amperes 14 5 Fuse or Circuit Breaker Capacity 288 vim Eb gt gt 2 2 gt O1 Outdoor Unit Microprocessor Control Control Auto Hi Me Lo DC Twin Rotary Inverter Max allowable tubing length per unit ft m 82 25 Refrigerant Narrow tube inch
8. HEE EE 2 15 16 4 7 16 Service valve on wide tube side Outer diameter 1 2 12 70 Service valve on narrow tube side Outer diameter 1 4 6 35 5 2 3 4 2 15 16 N Service valve on wide tube side Outer diameter 3 8 9 52 EEEEEEEEEEEEEEEEEEI LO Service valve on narrow tube side Outer diameter 1 4 6 35 Service valve on wide tube side Outer diameter 1 2 12 70 MMC 5 29 32 2 27 82 M CN o cO 4 di 9 N 2 1 32 4 1 2 Service valve on wide tube side Outer diameter 3 8 9 52 unit inch mm Ensure 6 15cm drain hose is to concrete or similar material 2 6 Diagram of Outdoor Unit Installation Never install only a single indoor unit Be sure to connect indoor and outdoor units only in combinations that are listed in the catalog or in the combination table that was provided with the outdoor unit Use caution Connecting any other model may result in operation failure and malfunction The dimensions indicated by lt gt in the figure below are spaces that are required in order to
9. Outdoor air temperature F Frost detection Compressor 80 Hz operation 4 way valve ON Outdoor fan Solenoid valve ON for hot gas bypass Indoor fan OFF Non stop defrosting Temperature of the outdoor heat exchanger is at or above the temperature shown in the table below Defrost operation has continued for 12 minutes max length Releasing of defrosting Temperature of releasing Defrost operation time Less than 2 minutes Heat exchanger temperature for No releasing 57 2 F or higher 1 releasing defrosting 1 The temperature for releasing of defrosting is 68 or higher when the outdoor air temperature is less than 32 F Defrost does not occur during HIGH POWER operation If other stopped indoor units are started during defrost operation they begin operating in defrost mode 2 Clean defrost If all indoor units are stopped during HEAT operation and frost is detected at the L1 line and the conditions for defrost are met then defrost operation occurs and the unit stops after defrost is completed 77 7 2 2 Current Control The operating current may rise as a result of causes including increasing heating or cooling loads or decreases in power voltage In these cases the operating frequency is automatically reduced or operation is stopped in order to control the operating current so that it is 20 A or less result g Power b
10. e use lug bolts or equal to bolt down unit reducing vibration and noise e install in a location where no antenna of a television or radio exists within 10 3 m 2 4 Baffle Plate for the Outdoor Unit It is recommended to use baffle plates When the outdoor unit is installed in a position exposed to strong wind such as seasonal winds with low air tempera ture in winter baffle plates must be installed on the outdoor unit Fig 5f This unit is designed so that the fan of the outdoor unit runs at low speed when the air conditioner is operated at low outdoor air temperatures When the outdoor unit is exposed to strong wind the system pressure drops because of the freeze protector Install a pair of windbaffle plates at the front and back of the outdoor unit if it will be subject to strong wind during the winter Figs 5f 5g 5h 5i and 5j 11 Outdoor unit 2 Exhaust fan a p i Heat source Obstacle above A Z Z ae 2 m 1 Fig 5a 2 t A 4 lt Air intake i Min 8 20 cm Valve v 4 a side PEL Min 10 4 5 25cm 4 10 discharge Min TEN cm ION M 1 8 50 Ground Min 8 20 cm Air intake Drain holes Anchor bolts 4 pcs IN AN A AV z NN W W
11. Heating Capacity gt RATING CAPACITY 29 200 BTU h AIR FLOW RATE 847 CFM OUTDOOR INDOOR ENT TEMP F C AMBIENT TEMP F 60 65 70 75 80 15 6 18 3 21 1 23 9 26 7 UJ 0 17 8 TH Total Heating Capacity BTU h 3 16 1 8 13 3 13 10 6 18 7 N 23 5 2 28 2 33 0 o Ee 38 3 29 43 6 O 48 8 53 11 7 58 14 4 63 17 2 TH TH TH TH TH TH TH TH TH TH TH TH TH TH H 65 18 3 T NOTE 1 Rating conditions Indoor Unit Entering Air Temp 70 F 21 1 C DB Outdoor Ambient Temp 47 F 8 3 DB 43 F 6 1 C WB 2 Above data does not take Defrost Operation Overload Prevention Protection and or Cold Air Prevention Protection during heating operation into account For this reason the value may vary from the actual heating characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 64 Outdoor Unit CU AKE24NBU Indoor Unit CS KE18NB4UW CS MKE12NB4U CS MKE12NB4U Power Supply 230V Single Phase 60Hz Heating Capacity gt RATING CAPACITY 28 400 BTU h AIR FLOW RATE 918 CFM OUTDOOR INDOOR AMBIENT TEMP F 65 18 3 ENT TEMP F UJ o 2 60 70 75 80 15 6 21 1 23 9 26 7 16 030 16 040 16 050 16 040 16 020 16 550 16 570 17 790 17 820 19 080 19 110 20
12. 10 cm longer than the required length for wiring Store excess wiring inside the cabinet 4 When connections are completed check that all con nections are correct as shown in the wiring system diagram on panel side b Be sure to ground the unit according to your local codes 6 Test Run Performing a test run e Refer to the test run procedures in the indoor unit installation manual e Perform the test run separately for each connected indoor unit If 2 units are operated simultaneously it is not possible to correctly check for errors in tubing and wiring e If the room temperature is 59 F 15 or below it may not be possible to check for tubing errors with cooling operation If this occurs perform heating operation for each unit individually and check that warm air is discharged from each unit If there is cold air mixed in with the warm air check the tubing connections again Checking tubing and wiring Perform the test run and check that operation is normal If there is an error in tubing or wiring the refrigerant may flow to indoor unit B when indoor unit A is operated for example CAUTION e Stop operation immediately if there is an error in tubing or wiring Turn the power breaker to OFF and check whether the inter unit cables are connected incorrectly or whether the narrow tubes A and B are connected in reverse Correct the connections e If there is an error in tubing pump down must be per
13. 5 Ws 2 T 362 HE 2 5 5 41 50 59 6 77 C5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F 2 MP current performance chart 2 Operating current performance chart a T 2 2 E i 1 ae um 86 95 104 41 50 59 68 25 30 35 40 C5 0 5 10 15 20 25 Outdoor air temperature F Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart AL 140 60 Ex o 68 0 20 NIE p L 131 55 3 64 4 18 S 122 50 1 60 8 16 119 45 S 57 2 14 S 104 40 D D 53 6 12 95 35 L 2 2 5 50 0 10 5 86 30 46 4 8 TT 25 7I 86 95 104 25 30 35 40 Outdoor air temperature m air i i This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 37 Outdoor Unit CU AKE24NBU Indoor Unit CS MKE24NKU x 1 ll Cooling Characterist
14. RH 85 Indoor fan speed High fan 230V 60Hz 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 2 Operating current performance chart A TTT AN AUNA Operating current A 3 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 3 Indoor discharge air performance chart 140 60 Indoor discharge air temperature F C o A 2 23 32 41 50 59 68 77 5 0 5 10 15 20 2 Outdoor air temperature F C This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 45 Outdoor Unit CU 4KE31NBU Indoor Unit CS MKE24NKU x 1 ll Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart is ll Sl E EHE d LEE TE EE ndoor air temp 86 F 27 Low pressure at wide tube ser
15. Twist wire ends Bx Z N Fig 29 Screw Ring connector Terminal plate I Le Wire Fig 30 9 32 7 mm ACTUAL STRIP Sze 4 ee Fig 26 E Solid wire Loop e s p Insulation Fig 27 m Stranded wire E O 1 Ring i connector lt a L D Screw and special washer N Ring connector TN N 5 5 Wiring Instructions for the Outdoor Unit e Be sure to correctly align inter unit cables A B C and D Outdoor unit Terminal board Power supply conduit Power Single phase 230208045 60HZ Power breaker E not provided Ground Power cable provided Inter Unit 12 Less than 85 ft Inter Unit is the indoor unit with refrigerant tubing that is connected to service valve D top of the outdoor unit refrigerant tubing that is connected to service valve A bottom of the outdoor unit conduit conduit Indoor unit A Indoor unit D i i it wi D is the indoor unit with 123 Label D Terminal board Terminal board Indoor unit B Inter unit cables Inter unit cables Indoor unit C B is the indoor unit with 14 not provided 14 not provided is the indoor unit with refrigerant tubing that i is refrigerant tubing that is Inter unit cables Inter unit
16. 0 5 10 15 20 25 Outdoor air temperature F 3 Indoor discharge air performance chart 140 60 Indoor discharge air temperature F o A 2 41 50 59 6 5 0 5 10 15 20 25 Outdoor air temperature F C e This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 40 Outdoor Unit CU AKE24NBU Indoor Unit CS KE12NBAUW x 1 Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart 174 amp 12 Ec Try gt sw s fool titi z 9 160 8 3 3 Ea oboe Z 1 0 Lr 132 3 09 5 77 86 95 104 3 32 25 30 35 40 C5 0 do 5 9 Outdoor air temperature F C s air temperature F C 2 M current performance chart 2 Operating current performanc
17. 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 44 Outdoor Unit CU 4KE31NBU Indoor Unit CS MKE18NKU x 1 lll Cooling Characteristics RH 46 Indoor fan speed High fan 230V 60Hz 1 Low pressure performance chart psig MPaG E Co Low pressure at wide tube service valv gu 2 Outdoor air temperature F C 2 Operating current performance chart N ELE Toy Operating current A Outdoor air temperature F C 3 Indoor discharge air performance chart ii lt ra he A E Ew LLL T l c 5 60 8 16 T 57 2 14 indoor ait ger on L D o 7 C b n orero 53 6 12 1 3 NN 50 0 10 2 464 8 L 86 95 104 25 30 35 40 Outdoor air temperature F Kee ll Heating Characteristics
18. 2 2 Major Component Specifications 2 2 1 Outdoor Unit Outdoor Unit CU 3KE19NBU Control PCB CB CU 3KE19NBU Control Circuit Fuse 250V 25A Compressor DC Twin Rotary Hermetic Compressor Model Nominal Output 5KD240XAB21 1 700W Compressor Oil Amount Pints cc FV50S 1 91 900 Coil Resistance Ambient Temp 68 F 20 C Ohm U V 0 720 V W 0 708 W 0 726 Safety Device CT Peak current cut off control Yes Compressor Discharge Temp Control Yes Operation cut off control in abnormal ambient Temp Yes Overload Relay Model CS 7L 2515 Operation Temp Open 239 F 115 C Close 212 F 100 C Run Capacitor Micro F VAC Crankcase Heater 230V 30W Propeller Q ty Dia inch mm 1 D18 1 8 D460 FNommdQuput 99 Coil Resistance Ambient Temp 68 F 20 Safety Device Type Internal Controller Over Current Protection Over Heat Protection Run Capacitor Micro F VAC Heat Exchanger Coil Face Area ft m DATA SUBJECT TO CHANGE WITHOUT NOTICE 17 Outdoor Unit CU 4KE24NBU Control PCB CB CU 4KE24NBU Control Circuit Fuse 250V 25A Compressor DC Twin Rotary Hermetic Compressor Model Nominal Output 5KD240XAB21 1 700W Compressor Oil Amount Pints cc FV50S 1 91 900 Coil Resistance Ambient Temp 68 F 20 C Ohm U V 0 720 V W 0 708 W 0 726 Safety Device CT Peak current cut off
19. 54 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F 2 Operating current performance chart Operating current A 41 50 59 68 77 C5 0 5 10 15 20 25 Outdoor air temperature F 3 Indoor discharge air performance chart 140 60 Indoor discharge air temperature F C 41 50 59 68 77 C5 0 5 10 15 0 25 Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 28 Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE12NKU x 1 Cooling Characteristics RH 46 Indoor fan speed High fan 230V 60Hz 1 Low pressure performance chart psig MPaG Low pressure at wide tube service valve Outdoor air temperature F C 2 Operating current performance chart e Len pum Operating current Outdoor air temperature F C 3 Indoor discharge air performance chart 95 10 25 30 85 40 Outdoor air temperature F C
20. 9 52mm Supplied Reducer Flare 1 2 12 70mm Union 3 8 9 52mm Outdoor unit Indoor unit 1 2 12 70mm CS MKE18NKU CS KE18NB4UW Y x CS MKE7NKU CS MKE9NKU CS MKE12NKU CS MKE9NB4U CS MKE12NB4U peu 1 4 6 35mm 4 9 9 52mm CS MKE7NKU CS MKE9NKU CS MKE 12NKU CS MKE9NBA4U CS MKE12NBAU X 3 8 9 52mm 1 4 6 35mm 3 8 9 52mm CS MKE7NKU CS MKE9NKU CS MKE 1 2NKU CS MKE9NB4U CS MKE12NB4U X 3 8 9 52mm 1 4 6 35mm Fig 4h C Outdoor unit 1 2 12 70mm Indoor unit D CS MKE18NKU 1 2 12 70mm d CS KET8NB4UW C CS MKE18NKU 1 2 12 70mm a CS KE18NB4UW B CS MKE7NKU CS MKE9NKU CS MKE12NKU 3 8 9 52mm CS MKE9NBAU CS MKE12NBAU A CS MKE7NKU CS MKE9NKU CS MKE12NKU TS CS MKE9NB4U CS MKE12NB4U Fig 4i 1 2 12 70mm 5 8 15 88mm Locally purchased 1 4 Flare 1 2 12 70mm Union 5 8 15 88mm Outdoor unit Indoor unit 5 8 15 88mm Dlg CS MKE24NKU 1 2 12 70mm 3 8 9 52mm CS MKE7NKU CS MKE9NKU CS MKE12NKU CS MKE9NB4U CS MKE12NB4U CS MKE7NKU CS MKE9NKU CS MKE 12NKU CS MKE9NBA4U CS MKE12NBAU 1 2 12 70mm T 1 4 6 35mm 3 8 9 52mm 3 8 9 52mm 1 4 6 35mm 3 8 9 52mm CS MKE7NKU CS MKE9NKU CS MKE12NKU CS MKE9NB4U CS MKE12NB4U 1 4 6 35mm Flare 1 2 12 70mm Union 3 8 9 52mm F U s NM
21. After finishing insulating and taping over the tubing use sealing putty to seal off the hole in the wall to prevent rain and draft from entering Fig 19 4 Air Purging Service Air and moisture remaining in the refrigerant system have valve on narrow tube side undesirable effects as indicated below Therefore they must be purged completely Service valve on wide tube side e pressure in the system rises operating current rises cooling efficiency drops moisture in the air may freeze and block capillary tubing water may lead to corrosion of parts in the refrigerant system Insulated tubes Fig 18 Apply putty here Tubing Fig 19 Manifold gauge special for R410A Low pressure High pressure valve valve adapter A VS Leave the for preventing reverse flow Z valve open special for Hex wrench Charging hose With push pin special for R410A m Air Purging with a Vacuum Pump for Test Run e In order to protect the earth s environment be sure to use a vacuum pump to perform the air purge Never perform an air purge by using the refrigerant gas cylinder or other external gas or by using the gas inside the outdoor unit 19 Fig 20 In order to prevent charging errors with the air conditioner that uses R410A the screw diameter at the service valve charging port has been changed When recharging or performing other servicing use t
22. C Outdoor air temperature F C NOTE e This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 47 Outdoor Unit CU AKES1NBU Indoor Unit CS MKE12NBAU x 1 ll Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 8526 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart dem ENCE ps NU psig MPaG psig MPaG Low pressure at wide tube service valve High pressure at wide tube service valve 41 50 59 68 7 5 O 5 10 15 20 5 Outdoor air temperature F C Outdoor air temperature F 2 7 current dii chart 2 Operating current performance chart EE z bU a E 8 TATIN 41 50 59 68 7 5 0 5 10 15 20 25 Outdoor air temperature F Outdoor air temperature F 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart es CELES
23. CS MKE7NKU CS MKE9NKU CS MKE12NKU J ereeee MKE9NB4U CS M 3 8 9 52mm Q IA 635m CS 9 U CS MKE12NB4U 3 8 9 52mm A mE CS MKE7NKU CS MKE9NKU CS MKE12NKU i MKE9NB4U CS MKE12N 3 8 9 52mm 1 4 6 35mm CS 9 U CS B4U Fig 4e D 3 8 9 52mm 1 2 12 70mm Locally purchased OF Flare 3 8 9 52mm Union 1 2 12 70mm Indoor unit 1 2 12 70mm Outdoor unit CS MKE18NKU CS KE18NB4UW 1 2 12 70mm 1 4 6 35mm 4 5 70mm CS MKE18NKU CS KE18NB4UW 3 8 9 52mm 1 4 6 35mm 9 52mm CS MKE7NKU CS MKE9NKU CS MKE 12NKU CS MKE9NB4U CS MKE12NB4U X 3 8 9 52mm 1 4 6 35mm 3 8 9 52mm CS MKE7NKU CS MKE9NKU CS MKE 1 2NKU CS MKE9NB4U CS MKE12NB4U X 3 8 9 52mm 1 4 6 35mm Fig 4f 3 Connecting indoor unit for CU 4KE31NBU A 1 2 12 70mm 3 8 9 52mm Supplied Reducer Flare 1 2 12 70mm Union 3 8 9 52mm Indoor unit 3 8 9 52mm CS MKE7NKU CS MKE9NKU CS MKE12NKU CS MKE9NB4U CS MKE12NB4U 1 2 12 70mm 1 4 6 35mm 3 8 9 52mm CS MKE7NKU CS MKE9NKU CS MKE 1 2NKU MH CS MKE9NBAU CS MKE12NBAU 1 2 12 70mm 1 4 6 35mm 3 8 9 52mm B EE CS MKE7NKU CS MKE9NKU CS MKE12NKU MKE9NBAU CS Ba sama WEGE CS MKE9NBAU CS MKE 12NBAU 3 8 9 52mm mE CS MKE7NKU CS MKE9NKU CS MKE12NKU MKE9NBAU CS NINE CS MKE9NB4U CS MKE12NB4U Fig 4g 1 2 12 70mm 3 8
24. Tube insulation not supplied Flare nut Vinyl tie supplied Fig 17b Drain hose insulation Drain pipe and insulation Refrigerant tubing and vinyl tie not supplied and insulation supplied not supplied Q Drain hose and nose Insulation tape supplied supplied P d Vinyl tie supplied Flare insulation supplied The procedure used for installing the insulation for both wide and narrow tubes are the same Fig 17c Never grasp the drain or refrigerant connecting out lets when moving the unit 3 7 Taping the Tubes After a tube has been insulated CAUTION never try to bend it into a narrow curve as this may cause the tube to break or crack 1 Atthis time the 2 refrigerant tubes and electrical wire if local codes permit should be taped together with armoring tape The drain hose may also be included and taped together as 1 bundle with the tubing 2 Wrap the armoring tape from the bottom of the outdoor unit to the top of the tubing where it enters the wall As you wrap the tubing overlap half of each previous tape turn Fig 18 3 Clamp the tubing bundle to wall using 1 clamp approx every 47 120 cm Do not wind the armoring tape too tightly since this will decrease the heat insulation effect Also be sure the con densation drain hose splits away from the bundle and drips clear of the unit and the tubing 3 8 Finishing the Installation
25. formed Be sure to perform pump down After making corrections again purge the air from the tubes 26 Terminal block a 1 Conduit plate Plug JC Access panel C Inter unit Power supply Conduit Conduit Fig 32 Access panel C Conduit plate Make sure there is no gap between access panel C and the conduit plate Fig 33 7 Connecting a Home Automation Device The HA white 4 terminal is located on the indoor unit PCB If a HA device will be used connect it to this terminal 8 Installation Check Sheet The strength of the installation location is sufficient to support the air conditioner weight The indoor and outdoor units are installed level and vertically The power and voltage are as specified Inter unit cables are securely fastened to the terminal board Inter unit cables are securely fixed The power cable and inter unit cables are not connected anywhere along their paths The ground wire is securely connected An air purge of the refrigerant circuit has been conducted A leak test of the tubing connections has been performed Thermal insulation has been applied to the tubing connections Drain connections are secure and water drains properly Putty has been used to close the hole in the wall All service valves are fully open Remote co
26. gt Goong He Total Capacity BTU h 22 400 8 500to 23 200 27 200 10 200 to 29 200 pee au S SensbieCapady Brum S latntCapacy 36 1707 2 900 e Powerin W 49 260 S PowerFador TEER ns 88 145 20 Outdoor Unit Microprocessor Control Auto Hi Me Lo DC Twin Rotary Inverter Max allowable tubing length per unit ft m 82 25 Refrigerant Narrow tube inch mm 1 4 6 35 x 4 Tube Diameter Wide tube inch mm Unit Dimensions inch 29 1 8 x 35 7 16 x 12 19 32 _ Height x Width x Depth mm 740 x 900 x 320 o Package Dimensions inch 34 3 16 x 41 11 32 x 16 21 32 Height x Width x Depth mm 868 x 1 050 x 423 2 Weight Net Ibs kg 143 3 65 0 E Shipping Ibs kg 2 13 41 0 38 DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit CS MKE7NKU 2units CS MKE9NKU 1units Outdoor Unit CU 4KE24NBU unit The combination indoor unit is AHRI 210 240 2 Rating conditions are Cooling Indoor air temp 80 F DB 67 F WB Heating Indoor air temp 70
27. mm 1 4 6 35 x 3 Tube Diameter Wide tube inch mm Unit Dimensions inch 29 1 8 x 35 7 16 x 12 19 32 _ Height x Width x Depth mm 740 x 900 x 320 o Package Dimensions inch 34 3 16 x 41 11 32 x 16 21 32 Height x Width x Depth mm 868 x 1 050 x 423 2 Weight Net Ibs kg 143 3 65 0 E Shipping Ibs kg a 13 41 0 38 DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit CS MKE9NKU 2units Outdoor Unit CU SKE19NBU unit The combination indoor unit is AHRI 210 240 2 Rating conditions are Cooling Indoor air temp 80 F DB 67 F WB Heating Indoor air temp 70 F DB Outdoor air temp 95 F DB 75 F WB Outdoor air temp 47 43 WB Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE9NKU x lt 230V gt 230V Single Phase 60Hz Cooling Total Capacity BTU h 18 600 9 800 to 18 600 24 800 11 600 to 24 800 kW 5 45 2 90 to 5 45 7 30 3 40to 7 30 Sensible Capacity 15 800 Latent Capacity 2 800 Air Circulation High ft min m3 h 1 707 2 900 1 707 2 900 Available Voltage Range 187 to 253 Voltage Rating Performance 00100 4 gt gt P Running Amperes Power Input W z Power Factor 98 j 9 X 2 BTU h W 12
28. 13 940 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 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 57 Outdoor Unit CU AKE24NBU Indoor Unit CS MKE9NKU x Power Supply 230V Single Phase 60Hz Cooling Capacity Low Ambient gt RATING CAPACITY 23 200 BTU h AIR FLOW RATE 777 CFM INDOOR OUTDOOR ENT TEMP F AMBIENT TEMP F 15 9 4 3 a d se 23 390 23 310 23 350 23 510 23 420 x owo 23 810 20 910 21070 21070 _ 23390 23310 23 350 23510 23420 _ 23390 23310 23350 23510 23420 _ 29390 23310 23 350 23 510 23 420 _ Lu 23 620 23 6010 23 770 24 080 24 070 Luo 23 610 17600 17 750 17 750 80310 23 610 20 460 20610 20460 23030 23610 23030 23 180 23480 23 620 23610 23 770 24080 24070 23750 14280 14430 14430 _ 16840 23 750 16 990 17 140 17290 _ 19060 23 750 19 710 19 860 19 860 _ 22 270 23 750 22 420 22570 22 570 10350 23680 10 660 10810 t0 960 _ _ 19220 23680 13 370 13 670 13 670 _ 15780 23680 16 090 16 390 16 390 1850
29. 21 360 23 050 22 980 24 760 24 690 26 540 26 460 28 380 28 290 30 190 30 090 32 110 32 000 34 050 33 930 36 000 35 870 37 870 37 730 39 790 39 640 40 540 40 390 TH Total Heating Capacity BTU h 17 890 17 850 17 810 17 750 3 16 1 18 400 18 340 8 13 3 19 830 19 770 13 10 6 21 310 21 240 65 15 6 18 3 21 1 23 9 26 7 18 7 8 22 930 22 860 23 5 O 4 24 630 24 550 28 2 2 26 390 26 310 33 0 28 220 28 130 38 3 Go m 30 020 29 920 43 6 O 31 920 31 810 48 8 33 840 33 720 53 11 7 35 770 35 650 58 14 4 37 630 37 500 63 17 2 39 530 39 390 65 18 3 40 270 40 130 1 Rating conditions 4 Indoor Unit Entering Air Temp 70 F 21 1 DB Outdoor Ambient Temp 47 F 8 3 C DB 43 F 6 1 WB 2 Above data does not take Defrost Operation Overload Prevention Protection and or Cold Air Prevention Protection during heating operation into account For this reason the value may vary from the actual heating characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 67 6 ELECTRICAL DATA 6 1 Electric Wiring Diagrams Outdoor Unit CU 3KE19NBU AlddNs LINN YOOCNI OL LINN LINN LINN HOOQNI V HOOQNI 8 HOOQNI 9 TERMINAL PLATE TERMINAL PLATE CORE FERRITE NYS dHOO
30. 4 8 77 25 77 86 95 104 23 77 25 30 35 40 5 25 Outdoor air temperature F C Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 35 Outdoor Unit CU AKE24NBU Indoor Unit CS MKE12NKU x 1 Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart psig MPaG psig MPaG Low pressure at wide tube service valve High pressure at wide tube service valve 23 3 1 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F Outdoor air temperature F 2 Operating current performance chart 2 Operating current performance chart rra 2 NENNT NTE TT lt lt t e 5 8 e e S S a a p 4 3 77 86 95 104 41 50 59 25 30 35 40 5 0 5 10 15 20 25 Ou
31. 5 10 15 20 25 Outdoor air temperature F Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked e The performance is for a tubing length of 24 6t 7 5m If the tubing length is different the performance chart will vary 27 Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE9NKU x 1 ll Cooling Characteristics RH 46 Indoor fan speed High fan 230V 60Hz 1 Low pressure performance chart psig MPaG Low pressure at wide tube service valve Outdoor air temperature F C 2 Operating current performance chart Operating current A 7 4 5 Outdoor air temperature F C Oi Ew 3 Indoor discharge air performance chart Kem m 0 20 NIE Indoor discharge air temperature F C Outdoor air temperature F C ill Heating Characteristics RH 85 Indoor fan speed High fan 230V 60Hz 1 High pressure performance chart psig MPaG High pressure at wide tube service valve 2 0
32. 500 20 530 21 990 22 020 23 530 23 570 25 130 25 160 26 700 26 740 28 360 28 400 30 050 30 080 31 740 31 780 33 370 33 410 35 050 35 090 35 700 35 740 TH Total Heating Capacity BTU h 0 17 8 3 16 1 16 560 16 540 8 13 3 17 810 17 790 13 10 6 19 100 19 090 18 7 8 20 530 20 510 23 5 0 22 010 22 000 28 2 2 23 560 23 540 33 0 25 190 25 130 38 3 G 2 26 730 26 700 43 6 O 28 390 28 360 48 8 30 070 30 040 53 11 7 31 770 31 530 58 14 4 33 400 32 030 63 17 2 35 070 32 450 65 18 3 35 400 32 570 NOTE 1 Rating conditions Indoor Unit Entering Air Temp 70 F 21 1 C DB Outdoor Ambient Temp 47 F 8 3 C DB 43 F 6 1 C WB 2 Above data does not take Defrost Operation Overload Prevention Protection and or Cold Air Prevention Protection during heating operation into account For this reason the value may vary from the actual heating characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 65 Outdoor Unit CU AKE31NBU Indoor Unit CS MKE9NKU x4 Power Supply 230V Single Phase 60Hz Heating Capacity RATING CAPACITY 32 000 BTU h AIR FLOW RATE 1 130 CFM OUTDOOR INDOOR AMBIENT TEMP F 65 18 3 ENT TEMP F C WB 60 70 75 80 15 6 15 6 21 1 23 9 26 7 17 980 17 970 17 950 17 910 17 870 18 570 18 540 19 990 19 95
33. 7 NENNEN S Co ww 42 14 5 Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity Outdoor Unit o 145 Outdoor Unit Operation Sound High Cool Heat dB A Max allowable tubing length per unit ft m Refrigerant Narrow tubs inch mm Tube Diameter Wide tube inch mm Unit Dimensions inch 29 1 8 x 35 7 16 x 12 19 32 Height x Width x Depth mm 740 x 900 x 320 Package Dimensions inch 34 3 16 x 41 11 32 x 16 21 32 Height x Width x Depth mm 868 x 1 050 x 423 2 Weight Net Ibs kg Shipping Ibs kg 152 1 69 0 13 41 0 38 DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit CS MKE9NKU 3units Outdoor Unit CU 3KE19NBU tunit 2 Rating conditions are Cooling Indoor air temp 80 F DB 67 F WB Heating Indoor air temp 70 F DB Outdoor air temp 95 F DB 75 F WB Outdoor air temp 47 DB 43 WB Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE9NKU x lt 208V gt 208V Single Phase 60Hz Cooling Total Capacity BTU h 18 600 9 800 to 18 600 24 800 11 600 to 24 800 kW 5 45 2 90 to 5 45 7 30 3 40to 7 30 Sensible Capacity 15 800 Latent Capacity 2 800 Air Circulation High ft min m3 h 1 707 2 90
34. 9u eje1edo jou seop luo 10sseJdu1oo eu L Outdoor unit Indoor unit eyeJedo ioopu Ier E mper sensor 18 valve mum temperature sensor 2 i E E 2 2 5 5 x 2 5 5 8 S 8 2 E o d Q c C t O 5 1 Q 2 2 O m O O M D 5 2 A o 985 8 Qs 5 5 E 5 u gt 52 95 5 p 92 g co O o 83 Indoor unit Outdoor unit Problems No of Inspection Points for Each part Inspection points 8 4 2 Inspection Points for Each Part Operation lamp does not illuminate Outdoor unit does not operate 4 way valve does not operate The compressor stops on occasion however defrost operation occurs Defrost operation does not occur 4 2 Q O O c o c 2 o O Operation lamp blinking Indoor fan dose not turn Outdoor fan dose not turn Does not cool or cooling performance is inadequate Does not heat or heating performance is inadequate not operate increase The outdoor air temperature is high The compressor only does not The compressor speed does not The electric expansion valve does operate 1 Outdoor control circuit board Refer to 8 3 1 Checking the outdoor unit Do not remove or insert
35. Amperes Power Input W Power Factor 2 1099 _ 99 5 EER BTU h W 10 9 g coP 4 wWww _ 40 J J0 Compressor Locked Rotor Amperes A 17 0 Fuse or Circuit Breaker Capacity Outdoor Unit O OOO QOvtdorUnit O Operation Sound High Cool Heat dB A Max allowable tubing length per unit ft m Refrigerant Narrow tube inch mm Tube Diameter Wide tube inch mm Unit Dimensions inch 35 1 32 x 35 7 16 x 12 19 32 Height x Width x Depth mm 890 x 900 x 320 Package Dimensions inch 40 1 8 x 41 11 32 x 16 21 32 Height x Width x Depth mm 1 019 x 1 050 x 423 2 Weight Net Ibs kg Shipping Ibs kg 189 6 86 0 15 88 0 45 DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit CS MKE9NKU 4units Outdoor Unit CU 4KE31NBU tunit 2 Rating conditions are Cooling Indoor air temp 80 F DB 67 F WB Heating Indoor air temp 70 F DB Outdoor air temp 95 F DB 75 F WB Outdoor air temp 47 DB 43 WB Outdoor Unit CU AKE31NBU Indoor Unit CS MKE9NKU x 4 lt 208V gt 208V Single Phase 60Hz Cooling Total Capacity BTU h 28 600 9 800 to 28 600 32 000 11 600 to 32 000 kW 8 40 2 90 to 8 40 9 40 3 40 to 9 40
36. C CENT 1 2 12 70mm 3 8 9 52mm Supplied Reducer Fig 4j 3 8 9 52mm E 1 2 12 70mm 5 8 15 88mm Locally purchased Flare 1 2 12 70mm Union 5 8 15 88mm Outdoor unit Indoor unit 5 8 15 88mm DLS HE CS MKE24NKU 1 2 12 70mm I 1 4 6 35mm 1 2 12 70mm C mE CS MKE18NKU 1 2 12 70mm I 635m SES CS KE18NB4UW B CS MKE7NKU CS MKEQNKU CS MKE12NKU cn LX mE CS MKEQNB4U CS MKE12NB4U Als EN CS MKE7NKU CS MKE9NKU CS MKE12NKU secon SE CS MKE9NB4U CS MKE12NB4U Fig 4k 10 2 3 Outdoor Unit AVOID e heat sources exhaust fans etc Fig 5a e damp humid or uneven locations DO e choose a place as cool as possible e choose a place that is well ventilated e install in a location where at least two sides are unob structed 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 unob structed Fig 5b e provide a solid base level concrete pad concrete block 6 x 14 15 x 40 cm beams or equal a minimum of 6 15 cm above ground level to reduce humidity and protect the unit against possible water damage and decreased service life Figs 5c and 5d CAUTION e install cushion rubber under unit s feet to reduce vibration and noise Fig 5e A solid base must not cover the hole of the bottom plate
37. Fig 3a Air delivery from a ceiling mounted cassette unit will be degraded if the distance INDOOR Tubing length L1 from the floor to the ceiling Indoor unit UNIT 1 is greater than 10 ft 3 m INDOOR UNIT 2 For stable operation of the Elevation L2 air conditioner do not install difference H1 OUTDOOR Minimum height UNIT gt L3 H2 wall mounted units less from floor level than 5 1 5 m from floor 5 1 5 m Fig 3a Fig 3b a level Fig 3b Floor level e install the indoor unit more than 3 3 1 m away from any antenna or power lines or connecting wires used for tele vision radio telephone security system or intercom Electrical noise from any of these sources may affect operation e install in a sturdy manner to avoid increased operating noise Table 3 Max Max Allowable Total Limit of Limit of Elevation Required Amount Allowable Tubing Length Total Tubing Length Difference of Additional Model Tubing Length at Shipment L1 L2 L3 or H1 H2 H3 H4 Refrigerant Per Unit L1 L2 L3 or L1 L2 L3 L4 ft oz ft ft L1 L2 L3 L4 ft ft CU 3KE19NBU 82 150 L1 L2 L3 150 L1 L2 L3 50 CU 4KE24NBU 150 L1 L2 L3 L4 200 L1 L2 L3 L4 50 0 22 CU 4KE31NBU 150 L1 L2 L3 L4 230 L1 L2 L3 L4 50 0 22 If total tubing length becomes 150 to 200 ft Max or 150 to 230 ft Max charge additional refrigerant
38. In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 43 Outdoor Unit CU AKES1NBU Indoor Unit CS MKE12NKU x 1 ll Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 8526 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart dem ENCE p Fd P aEEEBBEEHBEENE dl psig MPaG psig MPaG Indoor air te 27 C E Ur Low pressure at wide tube service valve High pressure at wide tube service valve 41 50 59 68 7 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F 2 Operating current performance chart 2 Operating current performance chart A bibi b i M 23 32 41 50 59 68 77 5 0 00 5 020 65 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart Outdoor air temperature F C Outdoor air temperature F C ge E mnm s mn 49 c NI I Operating current Operating current A Indoor discharge air temperature F C Indoor discharge air temperature F C 23 32 41 50 59 68 77 5 0 5
39. MAGNETIC COIL MAGNETIC COIL 1 2 3 4 5 112131415 REACTANCE LHM LHM a N o rT lt x s lt E WHT Dil 1P CONNECTOR LHM CONNECTOR 1P LHM LHM HOLO3NNOO dz CRANKCASE HEATER MAGNETIC COIL RV1 RVO COIL MAGNETIC COIL 5 18 qatu 18 HOLO3NNOO dz CONTROLLER YOLSINYAHL NO 2P CONNECTOR HI BLK 2P CONNECTOR 1 1 WHT 2 2 WHT WHT DEFROST VALVE 4WAY VALVE YOLSINYAHL Ng 13A Lome 13 15 HOLSINYSHL MO HOLSINHSHL NG Lem 18A HOLSIWH3HL M8 HOLSIIH3H L NV a 4 a HOLSIINH3H L MA EXPANSION BOARD 13A YOLSINYAHL MV HOLSIINH3H HOOGLNO 18 g s s HOLIMS aunssatid FAN MOTOR HOLSIINH3HL 1IOO z X18 LHM Lem na fH 2 gt 2 HOLSIINH3H L HOLO3NNOO d YOSSAYdNOO OVERLOAD RELAY OLR COMPRESSOR MOTOR 8FA2 5251 11300 1 70 7 FUNCTIONS 7 1 Explanation of Functions MeSH The numerical values such as temperature frequency time and current in parentheses are an example of CU 4KE31NBU and the values are different from the other models Control conditions Unit operation Explanation Power is supplied to
40. 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 56 Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE12NB4U x 3 Power Supply 230V Single Phase 60Hz Cooling Capacity Low Ambient gt RATING CAPACITY 17 400 BTU h AIR FLOW RATE 706 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F 15 9 4 3 Tu 17 690 17 750 17 600 x 7850 17720 17 690 17 750 17 600 17850 17 720 17 690 17 750 17 600 _ 17850 17 720 17 690 17 750 17 600_ ___ 17850 17 720 17 690 17 750 17 600 580 18 160 15 180 15 180 15 180 17820 18 160 17 780 17 920 17 920 18 250 18 160 18 210 18 350 18 240 18250 18 160 18 210 18 350 18 240 ioo 18530 12 020 12 160 12 160 14 770 18 530 14 770 14 900 14 900 17370 18 530 17 370 17 510 17 510 L 8 60 18 530 18 660 18 900 18 860 18 760 18 790 19 020 19 390 19 420 6 400 F730 8790 9000 so _ naro 18790 1 610 11750 11756 L 4080 18790 14220 14350 14350 LLL esso 16790 16820 16860 16960 sso 18890 8460 8 590 8730 10 930 18 890 11 060 11 200 11 340 13 530 18 890 13 670 13 810
41. R410A by 0 22 oz ft No additional charge of compressor oil is necessary For more detailed charging information refer to the Technical amp Service Manual 2 2 Connecting Indoor Units Figures 4a 4k show the different types of indoor unit connections including the use of a reducer To select the required indoor unit to be connected refer to the Combination Table that was included in the outdoor unit package 1 Connecting indoor unit for CU 3KE19NBU A Outdoor unit Indoor unit 3 8 9 52mm C 3 8 9 52mm CS MKE7NKU CS MKE9NKU CS MKE12NKU CS MKE9NB4U CS MKE12NB4U 1 4 6 35mm 3 8 9 52mm B 3 8 9 52mm CS MKE7NKU CS MKE9NKU CS MKE12NKU CS MKE9NBAU CS MKE12NBAU 1 4 6 35mm 3 8 9 52mm A 3 8 9 52mm CS MKE7NKU CS MKE9NKU CS MKE12NKU CS MKE9NB4U CS MKE12NB4U 1 4 6 35mm Fig 4a B Outdoor unit Indoor unit 3 8 9 52mm c A aM CS MKE7NKU CS MKE9NKU CS MKE12NKU 3 8 9 52mm 0 CS MKE9NB4U CS MKE12NB4U 3 8 9 52mm 14 mE CS MKE7NKU CS MKE9NKU CS MKE12NKU 0 CS MKE9NB4U CS MKE12NB4U 3 8 9 52mm 1 4 6 35mm 1 2 12 70mm ale a CS MKE18NKU CS KE18NB4UW 3 8 9 52 1 4 6 35mm Flare 3 8 9 52mm Union 1 2 12 70mm gt A joint for connecting tubes of different sizes 3 8 9 52 1 2 12 70mm Supplied Reducer Fig 4b 2 Connecting indoor unit for CU 4KE24NBU A 1 2 12
42. Unit Entering Air Temp 80 26 7 67 19 4 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 54 Outdoor Unit CU AKE31NBU Indoor Unit CS MKE9NBA4U x 4 Power Supply 230V Single Phase 60Hz Cooling Capacity RATING CAPACITY 28 600 BTU h AIR FLOW RATE 883 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F C WB 65 75 85 95 105 115 18 3 23 9 29 4 85 0 40 6 46 1 TC 28 830 27 880 26 840 26 270 21 300 15 500 22 560 22 210 21 700 21 360 19 130 15 500 59 x 15 0 x 172 32 080 31 110 30 020 29 730 22 560 16 340 10 730 10 380 10 040 9 870 7 470 5 410 13 980 13 640 13 300 13 130 10 730 8 670 21 7 63 2 67 x 194 71 I I I 7 32 920 31 940 30 850 30 690 22 770 16 470 10 040 9 700 9 360 9 360 6 780 4 900 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 1 Rating conditions 4 Indoor Unit Entering Air Temp 80 F 26 7 C DB 67 F 19 4 C WB Outdoor Ambient Temp 95 35 DB 2 Above data does not take Freeze Prevention Protection during cooling operation into account For this reason the value may vary from the
43. but the outdoor unit does not operate there may be a faulty connection between the indoor unit and the outdoor unit 8 3 2 Checking the defrost operation e Using forced defrost operation to check this function Work procedure Check items unit operation e Connect a dummy resistor of 39 k ohm to the outdoor Non stop defrost coil temperature sensor connector 1 30sec Indoor fan Setting Stop 80 Hz CM I ON 1 Solenoid valve ela 8 sec for hot gas bypass OFF Outdoor fan ON A Defrost start Release The maximum length of defrost operation is 12 minutes Defrost can also be released based on the below conditions for the outdoor heat exchanger sensor Less than 2 minutes Not released 2 minutes or more 57 2 F or higher 1 1 However the condition is 68 F or higher when the outdoor air temperature is below 32 F 82 f Each Part iagnosis o 8 4 Trouble D 8 4 1 Problems of Each Part and Inspection Points e For details about the inspection points refer to the Inspection Points for Each Part ES uc O o 2 Cc Qo lt eyenbepeui si 10 1e u s oq eyenbepeui si eoueuuojed Dui ooo 10 009 eje1edo 104 oujoe e eu SInoo0 uomneJedo 1s0JJep JOABMOY s eunjye1eduuej Joopino eu L OSPOIOUI seop peeds JOSSeJdWOd
44. control Yes Compressor Discharge Temp Control Yes Operation cut off control in abnormal ambient Temp Yes Overload Relay Model CS 7L 2515 Operation Temp Open 239 F 115 C Close 212 F 100 C Run Capacitor Micro F VAC Crankcase Heater 230V 30W Propeller Q ty Dia inch mm 1 D18 1 8 D460 FNommdQuput 99 Coil Resistance Ambient Temp 68 F 20 Safety Device Type Internal Controller Over Current Protection Over Heat Protection Run Capacitor Micro F VAC Heat Exchanger Coil Face Area ft m DATA SUBJECT TO CHANGE WITHOUT NOTICE 18 Outdoor Unit CU 4KE31NBU Control PCB CB CU 4KE31NBU Control Circuit Fuse 250V 25A Compressor DC Twin Rotary Hermetic Compressor Model Nominal Output 5JD420XAB22 3 000W Compressor Oil Amount Pints cc FV50S 2 55 1 200 Coil Resistance Ambient Temp 68 F 20 C Ohm Safety Device CT Peak current cut off control Yes Compressor Discharge Temp Control Yes Operation cut off control in abnormal ambient Temp Yes Overload Relay Model CS 7L 2515 Operation Temp Open 239 F 115 C Close 212 F 100 C Run Capacitor Micro F VAC Crankcase Heater 230V 30W Propeller Q ty Dia inch mm 1 D18 1 8 D460 FNommdQuput Coil Resistance Ambient Temp 68 F 20 Safety Device Type Internal Control
45. defrosting No releasing 57 2 F or higher 1 1 The temperature for releasing of defrosting is 68 or higher when the outdoor air temperature is less than 32 F Table 1 Control conditions Unit operation Explanation COOL The ON OFF operation button on the remote controller is pressed The room temperature has reached the desired temperature The thermostat turns OFF The thermostat turns ON again Freeze prevention Operation is restarted within 4 hours only when AUTO mode is selected with the remote controller Operation starts after 4 hours or more have passed The operation lamp illuminates The indoor fan operates at the set fan speed The outdoor unit stops The outdoor unit starts Compressor and the outdoor fan start When the frequency reaches Hz frequency increases are stopped for a period of B seconds Refer to Table 2 The frequency then increases The indoor temperature and the desired temperature are approximately equal After the thermostat turns ON again the outdoor unit will not operate for 3 minutes even if the room temperature increases above the desired temperature When the temperature of the indoor heat exchanger drops to approximately 35 6 F or below the compressor turns OFF the outdoor fan turns OFF and the indoor fan continues operating with no changes Approximately 3 minutes later if the temperature of the indoor heat exch
46. flare nuts are not reattached there is the danger of gas leakage Refer to Fig 24 If pump down is not possible If the air conditioner cannot be operated because of a malfunction or other cause use a refrigerant recovery device to recover the refrigerant 21 Narrow tube side Charging port Wide tube side Charging hose Fig 24 After disconnecting the inter unit tubes attach the flare nuts with flare bonnets 5 Wiring Instructions 5 1 General Precautions on Wiring 1 Before wiring confirm the rated voltage of the unit as shown on its nameplate then carry out the wiring closely following the wiring diagram 2 Provide a power outlet to be used exclusively for each unit with a power supply disconnect and circuit break er for overcurrent protection provided in the exclusive line 3 To prevent possible hazard due to insulation failure the unit must be grounded 4 Each wiring connection must be done tightly and in accordance with the wiring system diagram Wrong wiring may cause the unit to misoperate or become damaged 5 Do not allow wiring to touch the refrigerant tubing compressor or any moving parts of the fan 6 Unauthorized changes in the internal wiring can be very dangerous The manufacturer will accept no responsibility for any damage or misoperation that occurs as a result of such unauthorized changes 5 2 Recommended Wire Length and Diameter Regulations on wiring dia
47. front Panel sen di lt WWW Panel side L IIIT e Fig 5i Air Discharge Baffle Remove the panels front top side L and RH from the unit and drill 4 holes of 1 4 inch 6 5 mm at the prescribed positions Install the windbaffle on the unit using field supply bolts and nuts Recommended bolts to be used are 15 64 M6 ISO standard and the recommended length of the bolts is between 13 32 19 82 inch 10 15 mm Use washers and spring washers to tightly fasten the windbaffle to the unit Panel side R Panel top Panel front T7 UW N 222 2 22 N NN NN N NN N NNNM NN N NN NN NS 2 NN NN Z YA A N N A XS WW NN NN NN SSS NW NS 22222 0l 0 Z N AN A NN NN NN NS Panel side L Fig 5j e n order to prevent contact of the bolts and heat exchanger and other parts inside the unit install the windbaffle using bolts from inside the unit and fasten the bolts with nuts from outside the unit e When the windbaffle is installed on the unit the unit has higher wind resistance In order to prevent the unit from falling over anchor the legs of the unit using anchor bolts or similar method 4 Precautions for installation 1 Be sure not to damage painted s
48. 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 cycle 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 S Prohibit For the repair work in places w
49. kg Shipping Ibs kg 152 1 69 0 2 13 41 0 38 DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit CS MKE9NKU 3units Outdoor Unit CU AKE24NBU tunit 2 Rating conditions are Cooling Indoor air temp 80 F DB 67 F WB Heating Indoor air temp 70 F DB Outdoor air temp 95 F DB 75 F WB Outdoor air temp 47 DB 43 WB Outdoor Unit CU 4KE31NBU Indoor Unit CS MKE7NKU x 3 CS MKE9NKU Duct Less Type Rated lt 230V gt cooing He Total Capacity BTU h 29 000 9 800 to 29 000 30 600 11 600 to 32 000 ILE S SensbieCapady Brum _ 2440 S LatentCapady 4600 1 942 8 800 e Powerin W 2 6 20 S PowrFado 9 9 o E EER BTW 312 Sco Ww 3188 seen BrUWwh o 1 9 170 20 Outdoor Unit Microprocessor Control Auto Hi Me Lo DC Twin Rotary Inverter Max allowable tubing l
50. other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit CS MKE9NKU 3units Outdoor Unit CU AKE24NBU tunit 2 Rating conditions are Cooling Indoor air temp 80 F DB 67 F WB Heating Indoor air temp 70 F DB Outdoor air temp 95 F DB 75 F WB Outdoor air temp 47 DB 43 WB N Outdoor Unit CU 4KE24NBU Indoor Unit CS MKE9NKU x lt 208V gt 208V Single Phase 60Hz Cooling Total Capacity BTU h 23 200 9 800 to 23 200 29 200 11 600 to 29 200 kW 6 80 2 90 to 6 80 8 60 2 90 to 8 60 Sensible Capacity 19 600 Latent Capacity 3 600 Air Circulation High ft min m3 h 1 707 2 900 1 707 2 900 Available Voltage Range 187 to 253 Voltage Rating Performance 00100 4 gt lt gt gt a Running Amperes amp Power Input W Power Factor 2 1098 ZJ1GDL 9 8 EER BTU h W 11 4 NEN ww 38 y Compressor Locked Rotor Amperes A 14 5 Fuse or Circuit Breaker Capacity Outdoor Unit a o Outdoorunit O O O Operation Sound High Cool Heat dB A Max allowable tubing length per unit ft m Refrigerant Narrow tube inch Tube Diameter Wide tube inch mm Unit Dimensions inch 29 1 8 x 35 7 16 x 12 19 32 Height x Width x Depth mm 740 x 900 x 320 Package Dimensions inch 34 3 16 x 41 11 32 x 16 21 32 Height x Width x Depth mm 868 x 1 050 x 423 2 Weight Net Ibs
51. outdoor unit will not operate for 3 minutes after the thermostat turns OFF even if the room temperature drops below the desired temperature The frequency is not increased even if there is a difference between the room temperature and the desired temperature In some cases the frequency may be decreased 71 The unit is forced to stop for 3 minutes after the power is turned ON or 3 minutes after the compressor stops in order to protect the compressor The frequency is increased at the rate of 1 Hz every 0 5 seconds Depending on the relationship between the remote controller temperature setting and the room temperature the compressor may stop temporarily in other words the thermostat may turn OFF This is in order to stabilize the return of oil to the compressor If the indoor and outdoor temperatures are high the current peak cut off activates stopping any increases in frequency Operating frequency is stabilized in order to maintain a comfortable environment The outdoor unit stops It does not stop if the thermostat for another indoor unit is ON Approximately 30 seconds after the thermostat turns OFF the indoor fan is stopped The outdoor unit starts automatically after 3 minutes During these 3 minutes a low pressure pressure balance is achieved allowing the compressor to start more easily The amount of heat pump exceeds the amount of heat radiation from the room Therefore there is n
52. precautions e 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 e 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 the room immediately provide thorough ventilation 89 9 3 Tools Specifically for R410A e 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 adap
53. vary from the actual cooling characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 51 Outdoor Unit CU AKE24NBU Indoor Unit CS MKE9NKU x Power Supply 230V Single Phase 60Hz Cooling Capacity RATING CAPACITY 23 200 BTU h AIR FLOW RATE 777 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F C WB 65 75 85 95 105 115 18 3 23 9 29 4 85 0 40 6 46 1 TO 59 15 0 63 172 6 7 d 2 7 19 4 7 27 200 26 380 25 470 25 070 22 460 16 700 8 240 7 940 7 640 7 490 6 580 4 920 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h NOTE 1 Rating conditions Indoor Unit Entering Air Temp 80 F 26 7 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 52 Outdoor Unit CU AKE24NBU Indoor Unit CS KE18NB4UW CS MKE12NB4U CS MKE12NB4U Power Supply 230V Single Phase 60Hz Cooling Capacity RATING CAPACITY 22 000 BTU h AIR FLOW RATE 812 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP WB 65 75 85 95 105 115 18 3 23 9 29 4 35 0 40 6 46 1 TC 23 180 22 410 21
54. 0 23680 18 800 18 950 19 100 _ 23 050 23 390 24 090 25 020 25 390 7 640 T oeo 2339 9900 10200 10 550 12310 23 390 12 620 12 920 13 070 15030 23390 15330 15 630 15 780 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 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 58 Outdoor Unit CU AKE24NBU Indoor Unit CS KE18NB4UW CS MKE12NB4U CS MKE12NB4U Power Supply 230V Single Phase 60Hz lt Cooling Capacity Low Ambient gt RATING CAPACITY 22 000 INDOOR ENT TEMP F C BTU h AIR FLOW RATE 812 CFM OUTDOOR AMBIENT TEMP F 15 9 4 5 A vo orso 22160 21 570 21 570 21 570 22260 22 160 22 190 22 350 22 240 _ 2260 22 160 22 190 22 350 22 240 L 22260 22160 22 190 22 350 22240 x 22 550 17 940 18 100 18 100 0 40 22 550 21 100 21250 21 100 _ 22580 22 550 22 690 22 980 22 940 _ L 22580 22 550 22 690 22 980 22 940 22740 22 790 23 070 23 530 23 590 22760 14470 14 620 14630 17810 22 790 17470 17 630 17 630_ 80
55. 0 1 707 2 900 Available Voltage Range 187 to 253 Voltage Rating Performance 00100 4 gt lt gt gt 2 Running Amperes w Power Input W 1 470 1 735 oc Power Factor 98 9 2 BTU h W 12 7 SO 9 COP ww 0 j 42 Compressor Locked Rotor Amperes A 14 5 Fuse or Circuit Breaker Capacity Outdoor Unit ee Outdoor Unit Operation Sound High Cool Heat dB A Max allowable tubing length per unit ft m Refrigerant Narrow tubs inch mm Tube Diameter Wide tube inch mm Unit Dimensions inch 29 1 8 x 35 7 16 x 12 19 32 Height x Width x Depth mm 740 x 900 x 320 Package Dimensions inch 34 3 16 x 41 11 32 x 16 21 32 Height x Width x Depth mm 868 x 1 050 x 423 2 Weight Net Ibs kg Shipping Ibs kg 152 1 69 0 13 41 0 38 DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit CS MKE9NKU 3units Outdoor Unit CU 3KE19NBU tunit 2 Rating conditions are Cooling Indoor air temp 80 F DB 67 F WB Heating Indoor air temp 70 F DB Outdoor air temp 95 F DB 75 F WB Outdoor air temp 47 DB 43 WB e Outdoor Unit CU 4KE24NBU Indoor Unit CS MKE7NKU x 2 CS MKE9NKU Duct Less Type Rated lt 230V
56. 0 21 450 21 420 23 060 23 030 24 760 24 720 26 520 26 480 28 340 28 300 30 140 30 100 32 050 32 000 33 990 33 930 35 940 35 880 37 820 37 760 39 770 39 700 40 520 40 460 TH Total Heating Capacity BTU h o 0 17 8 3 16 1 18 510 18 460 8 13 3 19 920 19 870 13 10 6 21 380 21 330 18 7 8 22 990 22 940 23 5 0 24 680 24 620 28 2 2 26 430 26 370 33 0 28 250 28 180 38 3 30 040 29 970 43 6 O l 31 940 31 870 48 8 33 870 33 790 53 11 7 35 820 35 730 58 14 4 37 690 37 600 63 17 2 39 630 39 530 65 18 3 40 380 40 290 1 Rating conditions 4 Indoor Unit Entering Air Temp 70 F 21 1 DB Outdoor Ambient Temp 47 F 8 3 DB 43 F 6 1 C WB 2 Above data does not take Defrost Operation Overload Prevention Protection and or Cold Air Prevention Protection during heating operation into account For this reason the value may vary from the actual heating characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 66 Outdoor Unit CU AKE31NBU Indoor Unit CS MKE9NBA4U x 4 Power Supply 230V Single Phase 60Hz Heating Capacity gt RATING CAPACITY 32 000 BTU h AIR FLOW RATE 1 000 CFM OUTDOOR INDOOR ENT TEMP F C AMBIENT TEMP F WB 60 70 75 80 o 2 0 17 8 17 910 18 510 18 450 19 940 19 880 21 420
57. 10A See 9 3 Tools Specifically for R410A 9 5 1 Procedure for Replacing Compressor 1 Recovering refrigerant e Anyremaining refrigerant inside the unit should not be released to the atmosphere but recovered using the refrigerant recovery unit for R410A e Do not reuse the recovered refrigerant since it will contain impurities 2 Replacing Compressor e Soon after removing seals of both discharge and suction tubes of the new compressor replace it quickly 3 Checking for sealing e 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 e 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 e The equipment may be damaged if moisture remains in the tubing thus carry out the evacuation thoroughly e 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 91 b Recharging e Be sure to charge the specified amount of refrigerant i
58. 2 1 0 to 1 2 mm 2 Parts required field supply except for screws Air Intake Baffle Item Air Discharge Baffle Baffle plate Screw 5 82 x 15 82 4 x 12 mm tapping Bolt 15 64 x 19 32 25 32 M6 x 15 20 mm Nut 15 64 M6 Washer Spring washer Q ty Remarks Item Q ty Remarks 1 Baffle plate 1 2 Attached to outdoor unit Bolt 15 64 x 13 32 19 32 M6 x 10 15 mm 4 3 Nut 15 64 M6 4 3 Washer 4 3 Spring washer 4 3 12 3 Installation procedure 1 Air Intake Baffle 1 Left side 1 Remove the top panel from the unit 2 Remove the panel side L and drill 3 holes of 1 4 inch 6 5 mm at the prescribed position 3 Install the windbaffle on the unit using field supply bolts and nuts 4 Recommended bolts to be used are 15 64 M6 ISO standard and the recommended length of the bolts is between 19 32 25 32 inch 15 20 mm 5 Use washers and spring washers to tightly fasten the windbaffle to the unit 2 Right side 1 Remove the top panel from the unit 2 Use 2 preholes on the panel side H to install the baffle plate 3 Remove the panel side R from the unit by removing the screws These screws are used in step 4 below 4 Put sandwich the windbaffle between the unit and the panel side then install the windbaffle on the unit using the above screws Be careful not to damage the screw holes Panel top Panel
59. 310 22 790 20 460 20 620 20 620 _ L 22 740 22 790 23 070 23 530 23 590 22 700 22 850 23 310 23 960 24 140 8 000 x ijo 22 850 10 690 10 840 11 000 _ 18 520 22 850 13 680 14 000 14 000 _ 16 90 22 850 16 680 16 840 16 990 _ 19 360 22 850 19 680 19 830 19 830 2 900 22 710 10050 10370 10 530 12 740 22 710 13 050 13 370 13 370 115 730 22 710 16 050 16 210 16 360 _ TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 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 59 Outdoor Unit CU 4KE31NBU Indoor Unit CS MKE9NKU x 4 Power Supply 230V Single Phase 60Hz Cooling Capacity Low Ambient gt RATING CAPACITY 30 600 BTU h AIR FLOW RATE 1 036 CFM INDOOR OUTDOOR ENT AMBIENT TEMP F 15 9 4 G 30 760 27890 27 890 27890 80 70 30 760 30 800 31 010 30 890 _ 70 30 760 30 800 31 010 30 890 _ L 30870 30 760 30 800 31 010 30 890 Inu 31 140 31 130 31 320 31 720 31 730 23560 31 130 23 260 23 460 23460 26880 31 130 27 080 27280 2
60. 4 7 16 2 15 16 2 3 4 2 3 4 Unit inch mm 852 0 0010 20400 0 22 CU 4KE31NBU Outdoor Unit g g gt Ta L gt ux X gt jm oO 2 im oU o N Lo N go LO 5 J s o cd 2 gt lt ex 0 or E E 5 2 5 iii 9L Z v V o 811 0 c LL vl 068 2 1 Ss Jet Lan E Lr 5 11 32 HIH 23 15 16 35 7 16 900 Unit inch mm 852 0 0010 20300 0 23 4 REFRIGERANT FLOW DIAGRAM 4 1 Refrigerant Flow Diagram Outdoor Unit CU 3KE19NBU Indoor unit Outdoor unit iJ c c c _ ee Service valve on P Wide tube CW 9 O D 3 8 A BW 5 O D 3 8 X High pressure h Switc O D 3 8 Ze Header 4 way V gt valve Defrost valve for G hot gas bypass 5 Electric ms expansion service valve on valve a narrow tube Narrow tube CN M OB D lt CED D lt m gt CHD po lt Cooling cycle AN OB gt lt CED Pad hp E Header Heating cycle NEN eye Defrosting cycle Insulation of Refrigerant Tubing IMPORTANT Because capillary tubing is used in the outdoor unit both the wide and narrow tubes of this
61. 5 80 15 6 21 1 23 9 26 7 13 820 13 790 13 750 13 710 13 660 14 280 14 220 15 390 15 320 16 540 16 470 17 810 17 740 19 150 19 070 20 540 20 450 21 980 21 880 23 400 23 300 24 920 24 800 26 450 26 330 28 000 27 870 29 500 29 360 31 050 30 890 31 650 31 490 TH Total Heating Capacity BTU h UJ o 0 0 17 8 16 1 14 170 14 120 8 13 3 15 280 15 220 13 10 6 16 420 16 360 18 7 N 17 680 17 620 23 5 on 19 010 18 930 28 2 20 380 20 310 33 0 21 810 21 730 38 3 Co 4 23 220 23 130 43 6 24 720 24 620 48 8 26 240 26 130 53 11 7 27 770 27 660 58 14 4 29 250 29 130 63 17 2 30 780 30 660 65 18 3 31 380 31 250 1 Rating conditions 4 Indoor Unit Entering Air Temp 70 F 21 1 DB Outdoor Ambient Temp 47 F 8 3 C DB 43 F 6 1 WB 2 Above data does not take Defrost Operation Overload Prevention Protection and or Cold Air Prevention Protection during heating operation into account For this reason the value may vary from the actual heating characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 62 Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE12NB4U x 3 Power Supply 230V Single Phase 60Hz Heating Capacity gt RATING CAPACITY 24 000 BTU h AIR FLOW RATE
62. 580 21 020 19 870 14 760 15 260 14 940 14 630 14 310 13 840 11 790 172 63 2 67 19 4 25 110 24 320 23 450 22 980 20 880 15 450 8 320 8 000 7 690 7 930 6 900 5 160 71 21 7 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 53 Outdoor Unit CU 4KE31NBU Indoor Unit CS MKE9NKU x 4 Power Supply 230V Single Phase 60Hz Cooling Capacity RATING CAPACITY 30 600 BTU h AIR FLOW RATE 1 036 INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F C WB 65 75 85 95 105 115 18 3 23 9 29 4 85 0 40 6 46 1 72 22 2 59 6 244 15 0 26 7 84 28 9 88 31 1 32 150 31 030 29 820 29 290 23 300 16 930 72 22 2 20 040 19 640 19 030 18 830 16 420 13 800 76 24 4 17 2 26 7 84 28 9 88 31 1 72 222 76 24 4 194 267 84 28 9 88 81 1 63 67 71 2 4 7 21 7 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 1 Rating conditions 4 Indoor
63. 7 280 30500 31 130 30700 30700 30 700 _ ___ 31 40 31 130 31 320 31 720 31 730 18680 31270 18 830 19 030 19 030 82250 31 270 22450 22 860 22 860_ 85 70 31 270 26 080 26 280 26 480 _ 29 490 31 270 29 700 29 900 29 900 _ 13800 31120 14010 14410 14410 fraso 31120 17690 18 080 18230 eroso 31120 21250 21650 21 650 x 34470 24870 25270 25270 _ 30670 13 200 13 600 13 600 16220 30 670 16 620 17 020 17 220 19840 30 670 20 240 20 640 20 840 _ Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 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 60 Outdoor Unit CU 4KE31NBU Indoor Unit CS MKESNB4U x 4 Power Supply 230V Single Phase 60Hz Cooling Capacity Low Ambient gt RATING CAPACITY 28 600 BTU h AIR FLOW RATE 883 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F 15 9 4 T F pee x 890 x 790 28 810 28 990 28 870 25980 28790 25 810 25 980 25 980 28890 28 790 28 810 28 990 28 870 _ 28890 28790 28 810 28 990 28 870 _ 28
64. 70mm 3 8 9 52mm Supplied Reducer Flare 1 2 12 70mm Union 3 8 9 52mm Outdoor unit Indoor unit 3 8 9 52mm D g HE CS MKE7NKU CS MKE9NKU CS MKE12NKU CS MKE9NB4U CS MKE12NB4U 1 4 6 35mm 3 8 9 52mm C EN CS MKE7NKU CS MKE9NKU CS MKE12NKU CS MKEQNB4U CS MKE12NB4 3 8 9 52mm 1 4 6 35mm U 3 8 9 52mm B EN CS MKE7NKU CS MKE9NKU CS MKE12NKU CS MKEQNB4U CS MKE12NB4 3 8 9 52mm i 1 4 6 35mm U 3 8 9 52mm Als EN CS MKE7NKU CS MKE9NKU CS MKE12NKU fT CS MKE9NBAU CS MKE12NB4A4 3 8 9 52mm i 1 4 6 35mm U Fig 4c Outdoor unit Indoor unit 1 2 12 70mm D CS MKE18NKU 1 2 12 70mm CS KE18NB4UW Samm 3 8 9 52mm cls mE CS MKE7NKU CS MKE9NKU CS MKE12NKU MKE9NB4A4U CS MKE12 3 8 9 52mm TAA CS MKEQNB4U CS NB4U 3 8 9 52mm mE CS MKE7NKU CS MKE9NKU CS MKE12NKU MKE9NBAU CS MKE 3 8 9 52mm Alt CS MKE7NKU CS MKE9NKU CS MKE12NKU MKE9NB4U CS 3 8 9 52mm Q VA 635m CS 9 U CS MKE12NBAU Fig 4d C 1 2 12 70mm 5 8 15 88mm Locally purchased TOO Flare 1 2 12 70mm Union 5 8 15 88mm Outdoor unit Indoor unit 5 8 15 88mm ee Ig CS MKE24NKU 1 270 2 70mm Wg 1 4 6 35mm 3 8 9 52mm C CS MKE7NKU CS MKE9NKU CS MKE12NKU MKE9NBAU CS MKE12 3 8 9 52mm LX CS MKEQNB4U CS NBAU 3 8 9 52mm a
65. 803 CFM OUTDOOR INDOOR AMBIENT TEMP F 65 18 3 ENT TEMP 60 70 75 80 15 6 21 1 23 9 26 7 13 310 13 300 13 270 13 240 13 200 13 760 13 720 14 830 14 790 15 950 15 910 17 180 17 130 18 470 18 420 19 820 19 770 21 220 21 160 22 610 22 540 24 080 24 000 25 580 25 490 27 090 27 000 28 560 28 460 30 090 29 970 30 680 30 560 TH Total Heating Capacity BTU h UJ o 0 17 8 3 16 1 13 690 13 650 8 13 3 14 760 14 720 13 10 6 15 870 15 830 18 7 N 17 090 17 040 23 5 2 18 380 18 320 28 2 Ww 19 720 19 660 33 0 21 100 21 040 38 3 Go 22 480 22 410 43 6 O gt 23 940 23 860 48 8 25 420 25 340 53 11 7 26 920 26 830 58 14 4 28 380 28 280 63 17 2 29 880 29 780 65 18 3 30 470 30 360 NOTE 1 Rating conditions Indoor Unit Entering Air Temp 70 F 21 1 C DB Outdoor Ambient Temp 47 F 8 3 C DB 43 F 6 1 C WB 2 Above data does not take Defrost Operation Overload Prevention Protection and or Cold Air Prevention Protection during heating operation into account For this reason the value may vary from the actual heating characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 63 Outdoor Unit CU AKE24NBU Indoor Unit CS MKE9NKU x Power Supply 230V Single Phase 60Hz
66. 90 28 790 28 810 28 990 28 870 onzo 29 150 21 700 21 870 21 870 _ 85180 29 150 25 130 25 300 25 300 _ 90 29 150 28 390 28 560 28 560 _ 2970 29 150 29 320 29 660 29 650 Fazio 29510 17 580 17 760 17 930 20840 29 310 21 010 21 180 21 360 24100 29 310 24270 24440 24 610 L 27360 29 310 27 530 27 870 27 870 28 970 29 200 29 760 30 580 30 860 12960 29200 13 130 13470 13640 16 80 29 200 16 560 16 900 17 070 19 40 29 200 19 810 20 160 20 330 _ L 22 900 29 200 23 240 23 410 23 580 Poso 28820 12440 12 780 12 960 15 60 28 820 15 700 16 040 16 210 _ 18610 28 20 18 960 19 300 19 470 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 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 61 5 4 Heating Capacity Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE9NKU x Power Supply 230V Single Phase 60Hz Heating Capacity gt RATING CAPACITY 24 800 BTU h AIR FLOW RATE 847 CFM OUTDOOR INDOOR AMBIENT TEMP F 65 18 3 ENT TEMP F 60 70 7
67. BLESHOOTING BEFORE CALLING FOR SERVICE 8 1 Precautions before Performing Inspection or Repair B Both the indoor unit and outdoor unit include electronic control circuits Be sure to pay attention to the following before inspecting or repairing the outdoor side electronic circuits e High capacity electrolytic capacitors are used inside the outdoor unit controller inverter They retain an electrical charge charging voltage DC 311 V 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 control circuit board Power Lamp red turns OFF If the outdoor control circuit board is normal approximately 180 seconds will be required for the charge to dissipate However allow at least 30 minutes for the charge to dissipate if it is thought there might be trouble with the outdoor control circuit board For example if the outdoor control circuit board fuse has blown approximately 30 minutes will be required to discharge the high capacity electrolytic capacitors 80 8 2 Trouble Diagnosis by Error Monitor Lamps To prevent electric shock do not inspect or repair until the Power Lamp on the P C Board is turned off 8 2 1 Location of the Error Monitor Lamps Remove the top plate of outdoor unit and the cover of Electrical Component Box The Power Lamp and Error Monitor Lamps are located on the P C Board of Electrical Component Box Fig 1 H
68. E ZEUL m 8 2 1 2 I IA LE 1 g f MIL wlldu P 146 C od Indoor air temp ge r 30 E ero E G g E 118 E EX ld 2 90 0 6 77 104 41 50 59 68 77 29 80 85 40 C5 5 15 20 25 Outdoor air temperature Outdoor air temperature F C 2 Operating current chart 2 Operating current performance chart Operating current A Operating current A 41 C5 5 25 Outdoor air temperature Outdoor air E m i 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart gt lt O T T TT o 19 20 E 122 50 64 4 18 E E 113 45 60 8 16 T S 4104 40 amp 57 2 14 D lt 95 35 9 53 6 12 9 3 O 50 0 10 5 86 30 2 46 4 8 77 25 77 86 95 104 2 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked
69. F DB Outdoor air temp 95 F DB 75 F WB Outdoor air temp 47 43 WB Outdoor Unit CU 4KE24NBU Indoor Unit CS MKE9NKU x lt 230V gt 230V Single Phase 60Hz Cooling Total Capacity BTU h 23 200 9 800 to 23 200 29 200 11 600 to 29 200 kW 6 80 2 90 to 6 80 8 60 3 40 to 8 60 Sensible Capacity 19 600 Latent Capacity 3 600 Air Circulation High ft min m3 h 1 707 2 900 1 707 2 900 Voltage Rating Performance 00100 4 gt lt gt gt Available Voltage Range 2 Running Amperes PO Power Input W Power Factor 2 1098 J49 24JIc 98 5 EER BTU h W 11 4 S COP JJ Ww 898 4 T Compressor Locked Rotor Amperes A 14 5 Fuse or Circuit Breaker Capacity Outdoor Unit MB Outdoor unit O O O Operation Sound High Cool Heat dB A Max allowable tubing length per unit ft m Refrigerant Narrow tube inch mm Tube Diameter Wide tube inch mm Unit Dimensions inch 29 1 8 x 35 7 16 x 12 19 32 Height x Width x Depth mm 740 x 900 x 320 Package Dimensions inch 34 3 16 x 41 11 32 x 16 21 32 Height x Width x Depth mm 868 x 1 050 x 423 2 Weight Net Ibs kg Shipping Ibs kg 152 1 69 0 2 13 41 0 38 DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The values shown in performance section and electrical rating section above are based on the following unit combination For
70. Gnd blue Pin 5 Vcc brown Pin 6 PG white Pin 7 Vsp orange 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 87 9 REFRIGERANT R410A SPECIAL PRECAUTIONS WHEN SERVICING UNIT 9 1 Characteristics of New Refrigerant R410A 9 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 9 1 2 Components mixing proportions HFC32 50 HFC 125 50 9 1 3 Characteristics e Less toxic more chemically stable refrigerant e he 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 comp
71. Hz 1 Low pressure performance chart 1 High pressure performance chart 23 28 ge ge e 9 e 9 g 8 8 L i 5 BEP a a o 160 o 1 1 ii D T li 1 0 77 86 95 104 2053 32 41 50 59 68 77 25 30 35 40 C5 6 15 20 25 Outdoor air temperature F C Outdoor air temperature F 2 Operating current performance chart 2 Operating current performance chart inii FEE lt lt LLL Lu LT FEE gIIILIIIII MC 17 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 6 0 20 K se y ry o 131 55 64 4 18 9 122 50 8 60 8 16 2 113 45 9 9 5 4 104 40 D D G As 95 35 9 9 50 0 10 S 86 30 8 8 46 44 8 77 25 77 86 95 104 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdo
72. Hz Outdoor air temperature is below 32 F Outdoor air temperature is 32 F or higher 55 Hz 180 seconds 90 seconds Table 2 1 f fluctuation fan EE Control conditions Unit operation Explanation SENSOR The ON OFF operation The operation lamp illuminates The outdoor unit does not operate for 3 minutes DRY button on the remote The indoor fan operates at the set fan speed Even after the breaker is turned ON controller is pressed The outdoor unit stops The outdoor unit starts The frequency is increased at the rate of 0 5 Hz every 1 seconds Compressor and the outdoor fan start When the frequency reaches Hz This is in order to stabilize the return of oil to the frequency increases are stopped for a period compressor of 8 seconds Refer to Table 2 The frequency then increases If the indoor and outdoor temperatures are high the current peak cut off activates stopping any increases in frequency The room temperature DRY operation starts Operating frequency is stabilized in order to reaches the desired maintain a comfortable environment temperature and there is no need for further DRY A operation cooling The indoor fan changes between Low Operates to effectively dehumidify the air while and LL very low over a 6 minute cycle not excessively reducing the indoor This is 1 f fluctuation fan operation temperature Refer to Fig 2 The indoor unit operates at 1 f fluct
73. Panasonic TECHNICAL amp SERVICE MANUAL OUTDOOR UNIT CU 3KE19NBU CU 4KE24NBU CU 4KE31NBU DC INVERTER MULTI SYSTEM AIR CONDITIONER CU 3KE19NBU 1 852 361 27 19 100 BTU h Capacity at 230V Outdoor Model No Product Code No CU 4KE24NBU 1 852 361 28 lt Applicable Indoor Units gt CU 4KE31NBU 1 852 361 29 23 200 BTU h 30 600 BTU h 3KE19NB CU Wall mounted type MKE7NKU CS CS MKE9NKU CS MKE12NKU CS MKE18NKU CS MKE24NKU Semi concealed type 2 n m CS MKE9NBAU amp CZ 18BT1U 18BT1U CS MKE12NBAU amp CZ CS KE12NBAUW amp CZ 4KE24NBU CU IMPORTANT These air conditioners employ new refrigerant R410A Pay special attention when servicing the unit CU 4KE31NBU a e NL S NB BBB NN OSS IN REFERENCE NO SM700878 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 AN 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 f
74. Sensible Capacity 24 200 Latent Capacity 4 400 Air Circulation High ft min m3 h 1 942 3 300 1 942 3 300 Available Voltage Range 187 to 253 Voltage Rating Performance 00100 4 gt lt gt gt 9 Running Amperes amp Power Input W lt Power Factor 2 1099 9 i S EER BTU R W 112 ww 9 CO WW 40 Compressor Locked Rotor Amperes A 17 0 Fuse or Circuit Breaker Capacity Outdoor Unit O OOO x OutdorUnit O Operation Sound High Cool Heat dB A Max allowable tubing length per unit ft m Refrigerant Narrow tube inch mm Tube Diameter Wide tube inch mm o Unit Dimensions inch 35 1 32 x 35 7 16 x 12 19 32 Height x Width x Depth mm 890 x 900 x 320 o Package Dimensions inch 40 1 8 x 41 11 32 x 16 21 32 6 Height x Width x Depth mm 1 019 x 1 050 x 423 2 Weight Net Ibs kg Shipping Ibs kg 189 6 86 0 c 15 88 0 45 DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit CS MKE9NKU 4units Outdoor Unit CU 4KE31NBU unit 2 Rating conditions are Cooling Indoor air temp 80 F 67 F WB Heating Indoor air temp 70 F DB Outdoor air temp 95 F DB 75 F WB Outdoor air temp 47 DB 43 WB o
75. TE e ey o E anm 5 60 8 16 c 5 5 o 53 6 12 5 50 0 10 L s gt 5 46 4 8 FE ame o o E 8 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 48 Outdoor Unit CU 4KE31NBU Indoor Unit CS KE12NB4UW x 1 ll Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart 2 LL 2 amp as S 174 SIC o gt NTT o gt 12 oO i LII HE og o 3 0 8 8 146 5 1 0 AE 9 362 Indoor air temp 30 0 25 M 5 5 118 ero bI n t a a 2 0 D L o 5
76. actual cooling characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 55 5 3 Cooling Capacity Low Ambient Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE9NKU x Power Supply 230V Single Phase 60Hz Cooling Capacity Low Ambient gt RATING CAPACITY 18 600 BTU h AIR FLOW RATE 777 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F C WB 15 25 35 45 5 _ e ca ea ea TC _ 19030 18 900 18 890 18 960 18 810 _ _ 19030 18 900 18 890 18 960 18 810 _ 19 030 18 900 18 890 18 960 18 810 18 500 19 350 18 500 18 650 18 500_ 19430 19 350 19 410 19 580 19 480_ 19430 19 350 19 410 19 580 19 480 12470 19 710 12 620 12 620 12 620 15 330_ 19 710 15 330 15 480 15 480 18050 19 710 18 050 18 200 18 200 ___ 19 740 19 710 19 870 20 150 20 120 9150 19950 9 300 9450 _ 11860 19 950 12 010 12 160 12 160 14580 19 950 14 730 14 880 14 880_ 17290 19 950 19 890 20 020 20 430 21 000 21 140 6 280 f 8690 20020 8 840 9 000 9 000 11260 20020 11 560 11 710 11 710 13970 20 020 14 130 14 280 14 430 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 1 Above data does not take Freeze
77. air conditioner become cold To prevent heat loss and wet floors due to dripping of Van condensation both tubes must be well insulated with a Thickness Thickness proper insulation material The thickness of the insulation 5 16 8 mm Miia G On should be a min 5 16 8 mm After a tube has been insulated Narrow tube never try to bend it into a narrow CAUTION curve because it can cause the tube to break or crack Wide tube 24 Outdoor Unit CU AKE24NBU Indoor unit Outdoor unit GV IC clILLL 1 gee es ie Service valve on wide tube Sub Main Wide tube DW accumulator 0 O D 1 2 TS Fr CW S gt 0 D 3 8 AN EE BW 3 8 X Es AW BR Header valve Defrost valve for V G C Electric x Service valve on s 5 narrow tube I Narrow tube pad EX CN 0747 LASS Ex ns pred EDX e _ O D 1 4 Cooling cycle ky AN ap pk MN Heating cycle mE Strainer Header EN r Defrosting cycle Insulation of Refrigerant Tubing IMPORTANT Because capillary tubing is used in the outdoor unit both the wide and narrow tubes of this air conditioner become cold To prevent heat loss and wet floors due to dripping of P condensation both tubes must be well insulated with a Thi
78. anger is adove 46 4 F the system returns to its original conditions Starts operating in the same operating mode COOL and with the same temperature settings as before operation was stopped New operating mode is determined based on the temperature conditions at the time the ON OFF operation button is pressed 73 The outdoor unit does not operate for 3 minutes even after the breaker is turned ON The frequency is increased at the rate of 0 5 Hz every 1 seconds This is in order to stabilize the return of oil to the compressor If the indoor and outdoor temperatures are high the current peak cut off activates stopping any increases in frequency Operating frequency is stabilized in order to maintain a comfortable environment The outdoor unit stops It does not stop if the thermostart for another indoor unit is ON After 3 minutes the outdoor unit begins operating automatically During these 3 minutes a pressure balance is achieved allowing the compressor to start more easily In order to protect against freezing the compressor stops temporarily until the temperature of the indoor heat exchanger has risen Stop All indicator lamps turn OFF The indoor and outdoor units stop Within 4 hours after operation was stopped it is assumed that there has been no significant change in the indoor and outdoor temperatures and the previous conditions COOL are stored Frequency control G
79. before connecting them together This is effective for reducing gas leaks Fig 12 For proper connection align the union tube and flare tube straight with each other then screw in the flare nut lightly at first to obtain a smooth match Fig 13 3 5 Tubing Connections a Temporary connection Screw in 3 5 turns by hand Fig 14 b Tofasten the flare nuts apply specified torque as Table 4 Tube Dia Nut Tightening Torque Fig 9 If the previous flare tool clutch type is used ZZ 0 0472 1 2 mm Adjust so that the amount of tube protrusion is as shown in the figure Fig 10 ENS rr If the special R410A flare tool is used 0 to 0 0196 0 to 0 5 mm Copper tubing Flare tool Fig 11 Apply refrigerant lubricant here and here Fig 12 Union Flare nut Fig 13 1 4 6 35 mm 3 8 9 52 mm 21 32 17 mm 7 8 22 mm Approx 120 160 Ibs in 140 180 kgf cm Approx 300 360 Ibs in 340 420 kgf cm 1 2 12 70 mm 5 8 15 88 mm 1 1 32 26 mm 1 5 32 29 mm Approx 430 480 Ibs in 490 550 kgf cm Approx 590 710 Ibs in 680 820 kgf cm Service valve on narrow tube side lt K les OK YE ENS REX Service valve on wide tube side lt gt Fig 14 P2 CY x ON 17 0 RET gt vs XO aS Apply the provided label
80. cables 128 o senes a ee 14 not provided 14 not provided the outdoor unit Label Terminal board Be sure to perform grounding e Be sure to apply the provided labels to both e Attach a ground wire to either the ends of the inter unit cables to prevent mis outdoor unit or indoor unit wiring The units will not function if the wiring e f there is a grounding terminal connections are incorrect inside the room use the grounding AWG American Wire Gauge screw inside the indoor unit Fig 31 Use a dedicated air conditioner circuit for power To make connections to the outdoor unit remove the inspection panel and tubing panel Do not bring the inter unit cables or power cable into contact with tubing or service valves Use outdoor unit cable fasteners and fasten the inter unit cables at the location where the cables are double sheathed Arrange the wiring so that the inter unit cables are contained in the inspection panel and tubing panel as shown in Fig 31 25 Regulations on wire size differ from locality to locality For field wiring requirements please refer to your local electri cal codes Make sure that the installation fully complies with all local and national regulations 1 Remove access panel Fig 32 2 Connect the inter unit and power supply line accord ing to the drawing on the panel side 3 Be sure to size each wire allowing approx 4
81. ckness Thickness proper insulation material The thickness of the insulation 5 16 8 mm Mirco T6 6mm should be a min 5 16 8 mm After a tube has been insulated Narrow tube never try to bend it into a narrow CAUTION curve because can cause the tube to break or crack Wide tube 25 Outdoor Unit CU AKE31NBU Indoor unit Outdoor unit p ERE p E 2 Service valve on wide tube Sub Wide tube d DW a accumulator S MIU 2 O D 1 2 A CW jo O D 1 2 X High pressure gt itch BW swi O D 3 e VAN 25 AW lt A 4 way 43 Header valve Ix D Defrost valve for 6 S hot b N 5 Electric usen a x Service valve on ie 5 narrow tube I Narrow tube DN _ M b Q CN D 1 4 H gt lt HR is a DX O D 1 4 AN Cooling cycle pe PRENNE O D 1 4 Heating cycle mE Strainer Header EN Q nU M Defrosting cycle Insulation of Refrigerant Tubing IMPORTANT Because capillary tubing is used in the outdoor unit both the wide and narrow tubes of this air conditioner become cold To Insulation prevent heat loss and wet floors due to dripping of P condensation both tubes must be well insulated with a Thickness Thickness proper insulation material The
82. components included in the parts list for the corresponding unit and perform the work with the appropriate tools Incorrect or poor repair work may cause an electric shock or fire Never modify the unit Doing so may cause an electric shock or fire Perform all electric work according to local applicable regulations related to electrical equipment or interior wiring regulation and make sure to use the exclusive circuit Insufficient capacity to the electric circuit or defective arrangement results may cause an electric shock or fire 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 9929993929 If refrigerant gas blows off during the work do not touch the refrigerant gas as it may cause
83. cu rity system or intercom any closer than 3 4 1 m from the power cable and wires between the indoor and outdoor units Electrical noise may affect the operation 5 3 Wiring System Diagram 3 indoor units with CU 3KE19NBU Disconnect switch Field supply I I 230 208V 30 208 OUTDOOR UNIT Terminal 9P a Sle 230 208V e O lt Grounding lin Disconnect i B N switch Field supply T EE O 230 208V 5 _ m z 230 208V lt aee 2777 OE 230 208V a O gt z o lt Grounding gt Disconnect line 9 switch Field supply 230 208V O 2 230 208V S 2 Z C 28 gt C o E 230 208V O a e Jo 2 265 Grounding line Terminal e 2P Fig 25a 23 e To avoid the risk of electric shock each air conditioner unit must be grounded e For the installation of a grounding device please observe local electrical codes e Grounding is necessary especially for units using inverter circuits in order to release charged electricity and electrical noise caused by high tension Otherwise electrical shock may occur e Place a dedicated ground more than 7 2 m away from other grounds and do not have it shared with other electric appliances e
84. details CAUTION Check local electrical codes and regulations before obtaining wire Also check any specified instructions or 1 4 Type of Copper Tube and Insulation Material If you wish to purchase these materials separately from a local source you will need 1 Deoxidized annealed copper tube for refrigerant tub ing as detailed in Table 2 Cut each tube to the appropriate lengths 1 to 1 4 limitations 30 cm to 40 cm to dampen vibration between units Table 2 Narrow Tube Wide Tube Model Outer Dia Thickness Outer Dia Thickness CS MKE7NKU CS MKE9NKU CS MKE12NKU 1 4 6 35 mm 0 0314 0 8 mm 3 8 9 52 mm 0 0314 0 8 mm CS MKE18NKU 1 4 6 35 mm 0 0314 0 8 mm 1 2 12 70 mm 0 0314 0 8 mm CS MKE24NKU 1 4 6 35 mm 0 0314 0 8 mm 5 8 15 88 mm 0 0393 1 0 mm CS MKE9NBAU CS MKE12NB4U 1 4 6 35 mm 0 0314 0 8 mm 3 8 9 52 mm 0 0314 0 8 mm CS KE18NB4UW 1 4 6 35 mm 0 0314 0 8 mm 1 2 12 70 mm 0 0314 0 8 mm 1 5 Additional Materials Required for Installation 1 Refrigeration armored tape 2 Insulated staples or clamps for connecting wire See local codes 3 Putty 4 Refrigeration lubricant 5 Clamps or saddles to secure refrigerant tubing 2 Installation Site Selection Indoor unit 2 1 Indoor Unit To prevent abnormal heat generation WARNING and the possibility of fire do not place obstacles enclosures and grilles in front of or surrou
85. door Unit CU 3KE19NBU Indoor Unit CS MKE9NBAU x 1 Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart a Keer nm P em a Low pressure at wide tube service valve High pressure at wide tube service valve 68 25 30 35 40 5 0 5 0 a 5 20 25 Outdoor air temperature F C Outdoor air temperature F C 2 US current performance chart 2 Operating current performance chart Kem e gt m IIIGII IIIIIIQI IIIIIUIM 5 T j Al lt lt lt 5 5 lt o o B 4 E lt 1 TATE EET ELIT 77 86 95 104 25 30 35 40 5 0 5 a 0 a 5 20 25 Outdoor air temperature F Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart SES Ex o 68 0 20 N I Sa o tex 64 4 18 g f E 60 8 16 o 2 2 57 2 14 E 5 2 TU 5 53 6 12 50 0 10 o o 46 4 8 77 86 95 104 23 32 77 25 30 35 40 5 0 25 Outdoor air temperature F C m air i i This performance chart shows operation of a single wall mounted indoor unit The performanc
86. e chart 7 L 5 5 5 6 5 gt 5 5 O 5 77 86 95 104 25 30 35 40 5 O 9 65 Outdoor air temperature F Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart O CH AME 2 z 60 8 16 8 122 50 Q 57 2 14 113 45 2 2 53 6 12 S 104 40 E E 2 50 0 10 95 35 D 2 5 5 5 46 44 8 o 86 30 E 42 8 6 77 25 77 86 95 104 41 25 30 35 40 5 5 25 Outdoor air temperature Outdoor air i i This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 41 5 1 3 Temperature Charts CU 4KE31NBU Outdoor Unit CU 4KE31NBU Indoor Unit CS MKE7NKU x 1 ll Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart g T
87. e chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 31 Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE12NBAU x 1 Cooling Characteristics RH 46 Indoor fan speed High fan 230V 60Hz 1 Low pressure performance chart em Gey AE LS LEE Hd um N psig MPaG Low pressure at wide tube service valve LL pe AN VT Outdoor air temperature F C 2 Operating current performance chart Cem e pum lt 5 5 aaa c E p a Outdoor air temperature F C 3 Indoor discharge air performance chart 68 0 20 O 64 4 18 Oo iB 50 0 10 Indoor discharge air temperature F Outdoor air temperature F C Heating Characteristics RH 85 Indoor fan speed High fan 230V 60Hz 1 High pressure performance chart psig MPaG o BI S LUTTE Ze 5 0 8 0 5 80 5 Outdoor air temperature F High pressure at wide tube service valve 2 Ope
88. eakage Table of Contents Page A SAFETY PRECAUTIONS na nn 2 TABLE OF CONTENTS pud seg et a oett oh ded 4 B APPLICABLE INDOOR UNITS a sea nnns sa nsn ars r 6 1 OPERATING RANGE 7 2 SPECIFICATIONS Ui peGi C I 2 E N 8 2 2 Major Component Specifications a ra ar nnne nnne nnn nnns 17 2 3 Other Component Specifications 20 3 zunmui 21 4 REFRIGERANT FLOW DIAGRAM Remgerami Flow Diagrami uuu uuu DRM RUNE 24 5 PERFORMANCE DATA 5 1 Temperature Charts ee ee ee 27 5 2 Cooling M T 50 5 3 Cooling Capacity Low Ambient a a ue 56 Te E 62 6 ELECTRICAL DATA Gale EICCIFIC VVINING uuu uu ui om mm 68 7 FUNCTIONS fale Explianalion ol FONCIONS EROR 71 7 2 Protective F nCIONS uuu uu uuu u u 77 8 TROUBLESHOOTING BEFORE CALLING FOR SERVICE 8 1 P
89. eat Exchanger Rear side P C Board of Electrical Component Box Error Monitor Lamps Power Lamp lt gt ERRO ERR1 D 4D ERR2 gt Fig 1 View from top Front side 8 2 2 Display of the Error Monitor Lamps If a protective device has activated or there is a sensor failure in the outdoor unit the 4 error monitor lamps on the outdoor control circuit board will indicate the nature of the trouble Q ON X OFF Error Monitor Lamp Lo x 0 sremwesdehneem lt x C X 9 Sr eh Deron a o o x ommes o x O X x O o X sensortrtranenine o 9 X X X O SwererenhpbeDMdeuo _ X X o O x O O Wwwwempoereheny _ x o O T aeuaton ornesze prectontmeon U o O O O Delator ener message on indoor LED 81 8 3 Checking the Outdoor System 8 3 1 Checking the outdoor unit Work procedure Check items unit operation Apply 220 V AC between terminals L1 and L2 on the e The LED red on the control board must illuminate outdoor unit terminal plate e Short circuit the T RUN terminal to the COM terminal The compressor fan motor 4 way valve and solenoid of TEST T RUN terminals valve for the hot gas bypass must turn ON They turn ON about 70 seconds later after the power is turned ON If the above check items are okay
90. ength per unit ft m 100 30 5 Refrigerant Narrow tube inch mm 1 4 6 35 x 4 Tube Diameter Wide tube inch mm Unit Dimensions inch 35 1 32 x 35 7 16 x 12 19 32 _ Height x Width x Depth mm 890 x 900 x 320 o Package Dimensions inch 40 1 8 x 41 11 32 x 16 21 32 Height x Width x Depth mm 1 019 x 1 050 x 423 2 Weight Net Ibs kg 180 8 82 0 E Shipping Ibs kg 15 88 0 45 DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit CS MKE7NKU 3units CS MKE9NKU 1units Outdoor Unit CU 4KE31NBU tunit The combination indoor unit is AHRI 210 240 2 Rating conditions are Cooling Indoor air temp 80 F DB 67 F WB Heating Indoor air temp 70 F DB Outdoor air temp 95 F DB 75 F WB Outdoor air temp 47 DB 43 WB J Outdoor Unit CU AKE31NBU Indoor Unit CS MKE9NKU x 4 lt 230V gt 230V Single Phase 60Hz Cooling Total Capacity BTU h 30 600 9 800 to 30 600 32 000 11 600 to 32 000 kW 9 00 2 90 to 9 00 9 40 3 40 to 9 40 Sensible Capacity 25 800 Latent Capacity 4 800 Air Circulation High ft min m3 h 1 942 3 300 1 942 3 300 Available Voltage Range 187 to 253 Voltage Rating Performance 00100 4 gt lt gt gt a Running
91. er wires of the red Power Lamp Replace the controller NOTE Replace the coil Use the special service magnet and Cool the main unit with Open and close the rotate 5 revolutions clockwise to fully a damp cloth or other electric expansion valve close the valve means while welding by hand to check it Then start the unit and measure the When applying temperature at the inlet and outlet vacuum use the tubes of the electric expansion valve If the temperature difference is large the valve is closed Then rotate 5 revolutions Resistance is OK if it is 46 4ohm at 68 F No temperature change Temperature changes special service magnet and rotate at least 5 revolutions counterclockwise to fully open the electric expansion valve Replace the electric This part is normal counterclockwise to open the valve expansion valve Check elsewhere Operation is normal if the temperature difference between the 2 tubes drops 1 If you have manually checked the electric expansion valve be sure to reapply the outdoor power after you have replaced the wiring The position of the elecric expansion valve will changed 85 8 Branch tubing temperature sensor Check that the sensor is securely contained in the thermostat holder 9 Breaker Check whether or not the breaker has been tripped Check that the breakers and fuses used are of the specified capacity Check that the breaker and its line are
92. ere e When relocating or disposing of the air conditioner request this service from the dealer where the unit was purchased or from an appropriate agent Perform pump down as described below What is pump down e Pump down refers to recovering the refrigerant gas from the refrig erant cycle at the outdoor unit This work must be performed dur ing cooling operation The refrigerant gas cannot be recovered during heating operation e During winter or if the temperature sensor prevents cooling opera tion perform forced cooling operation Pump down procedure 1 Fully close the spindles at the valves on the narrow tube side of tubes A B C and D Refer to Fig 22 2 Connect the manifold gauge to the charging port at the valve on the wide tube side of tube D Purge the air from the charging hose Refer to Fig 23 3 Perform cooling operation or forced cooling operation When the pressure at the low pressure side is 0 05 0 1 MPaG 0 5 1 kg cm G fully close the spindles at the valves on the wide tube side of tubes A B C and D and immediately stop operation Refer to Fig 23 In the winter the outdoor unit may stop after 5 10 minutes of operation This is in order to protect the indoor unit heat exchanger from freezing and does not indicate a problem 4 Disconnect the manifold gauge and the inter unit tubes and attach the caps and flare nuts At this point pump down is com pleted If the caps and
93. exclusive for use 10 Refrigerant gas pressure Start a COOL test run and messure the temperatures of the A C intake air and discharge air Compare the values with the performance charts e If the values are higher than the performance charts Check for refrigerant shortage or blockage of the refrigerant circuit Assessment of refrigerant shortage gt 1 The pressure in the low pressure section is 5 MPa or more below the value in the performance charts 2 There is little condensation on the indoor heart exchanger which overall appears dry Distinguishing between refrigerant shortage and refrigerant circuit blockage If the pressure in the low pressure section does not change when the circuit is charged 2 to 3 times with refrigerant gas 0 44 lbs each time or if the change is small then the problem may not be refrigerant shortage The problem may be a blockage of the refrigerant circuit 1 Check that there is no internal leakage inside the 4 way valve At the low pressure side tubing check that there is no temperature difference between the intake and discharge of the 4 way valve 2 Check that the electric expansion valve is not blocked Check as described on the preceding page 86 8 5 Trouble Diagnosis of Fan Motor e 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 e Perform the tro
94. frigerant while piping work for an installation or re installation and while repairing refrigeration parts Handle liquid refrigerant carefully as it may cause frost bite When Servicing Turn the power OFF at the main power box mains before opening the unit to check or repair electrical parts and wiring Keep your fingers and clothing away from any moving parts Clean up the site after you finish remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced The illustrations are based on the typical appearance of a standard model Consequently the shape may differ from that of the air conditioner that you are installing Others Ventilate any enclosed areas when installing or testing the refrigeration system Escaped refrigerant gas on contact with fire or heat can produce dangerously toxic gas Confirm upon completing installation that no refrigerant gas is leaking If escaped gas comes in contact with a stove gas water heater electric room heater or other heat source it can produce dangerously toxic gas Do not install only a single indoor unit Do not touch the air inlet or the sharp aluminum fins of the outdoor unit You may get injured Do not sit or step on the unit you may fall down accidentally Do not stick any object into the FAN CASE You may be injured and the unit may be damaged 1 General This booklet briefly outlines where and how to
95. ge p gt 98 8 8 160 1 1 pi z TH LLL P iiL ST 238 a 146 2 gt T 2 T e Z 0 9 77 86 95 104 2 5 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F Outdoor air temperature F C 2 Operating current performance chart 2 Operating current performance chart 8 rra m T 6 e 5 77 86 95 104 41 50 59 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 o L 131 55 z 122 50 2 5 113 45 DLE S 104 40 80 D aT 95 35 eam E 5 86 30 2 77 25 41 50 59 6 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 30 Out
96. ges are used in this system Carefully refer to the wiring diagram and these instructions when wiring Improper connections and inadequate grounding can cause accidental injury or death Ground the unit following local electrical codes Connect all wiring tightly Loose wiring may cause over heating at connection points and a possible fire hazard To prevent possible hazards from insulation failure ae the unit must be grounded When Transporting 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 Be careful when picking up and moving the indoor and out door units Get a partner to help and bend your knees when lifting to reduce strain on your back Sharp edges or thin alu minum fins on the air conditioner can cut your fingers When Installing 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 Select an installation location which is rigid and strong enough to support or hold the unit and select a location for easy maintenance In a Ceiling or Wall Make sure the ceiling wall is strong enough to hold the unit s weight It may be necessary to construct a strong wood or metal frame to provide added support In a Room Properly insulate any tubing run inside a room to prevent sweating that can cause dripping and water damage to walls and floors Keep t
97. h of 24 6ft 7 5m If the tubing length is different the performance chart will vary 38 Outdoor Unit CU AKE24NBU Indoor Unit CS MKE9NBAU x 1 Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart a Keer nm P em a Low pressure at wide tube service valve High pressure at wide tube service valve 68 25 30 35 40 C5 0 9 65 Outdoor air temperature F C Outdoor air temperature F C 2 MP current performance chart 2 Operating current performance chart lt 5 lt 4 2 S 5 3 77 86 95 104 41 50 59 68 25 30 35 40 C5 0 6 10 15 20 25 Outdoor air temperature F Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart eere Indoor discharge air temperature F gi D 2 Indoor discharge air temperature F 53 6 12 50 0 10 46 4 8 77 86 95 104 23 77 25 30 35 40 5 0 25 Outdoor air temperature m air i i This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance val
98. he special charging hose and manifold gauge Stopper Cap tightening torque 170 215 Ibs in 200 250 kgf cm Tighten by hand then use a wrench to turn Eu T 45 Perform the air purge for tubes A B C and D Use the same Spindle procedures for all tubes 1 Check that each tube both narrow and wide tubes UNE 20 threads between the indoor and outdoor units have been proper ly connected and all wiring for the test run has been Valve e completed Note that both narrow and wide tube service 5 valves the outdoor unit are kept closed at this stage 2 Using an adjustable wrench or box wrench remove the valve caps from the service valve on both narrow and wide tubes 3 Connect a vacuum pump and a manifold valve with pressure gauges to the service port on the wide tube service valve Fig 20 Service port Screw diameter 1 2 Z TL MOLL Cap nut tightening torque 60 95 Ibs in 70 110 kgf cm Tighten by hand then use a wrench to turn approximately 30 Structure of service valve wide tube side Before using the vacuum pump SAUTION adapter read the vacuum pump adapter manual and use the External diameter of service port R410A 5 16 adapter correctly Fia 21 ig e When using a hex wrench to open the spindle an extremely small amount of refrigerant may leak This does not indicate a problem CAUTION Be sure to use a ma
99. he fire alarm and the air CAUTION outlet at least 1 5 m away from the unit In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid level foundation for the outdoor unit This prevents water damage and abnormal vibration In an Area with High Winds Securely anchor the outdoor unit down with bolts and a metal frame Provide a suitable air baffle In a Snowy Area Install the outdoor unit on a raised platform that is higher than drifting snow Provide snow vents When Connecting Refrigerant Tubing When performing piping work do not mix air except for speci fied refrigerant R410A in refrigeration cycle It causes capacity down and risk of explosion and injury due to high tension inside the refrige rant cycle Refrigerant gas leakage may cause fire Do not add or replace refrigerant other than specified type It may cause product damage burst and injury etc Ventilate the room well in the event that refrigerant gas leaks during the installation Be careful not to allow contact of the refrigerant gas with a flame as this will cause the generation of poisonous gas Use the flare method for connecting tubing Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them then tighten the nut with a torque wrench for a leak free connection Check carefully for leaks before starting the test run Do not leak re
100. ics ll Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart Sem bres 7 Ee TL use aye 27 S CERE L psig MPaG psig MPaG Low pressure at wide tube service valve High pressure at wide tube service valve 0 9 77 86 95 104 50 5 25 30 35 40 C5 0 6 10 15 20 5 Outdoor air temperature F C Outdoor air temperature F 2 7 current 2 Operating current performance chart lt lt S 4 S S 5 Q9 65 Outdoor air temperature Outdoor air temperature 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart Indoor discharge air temperature F C 41 50 59 68 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing lengt
101. install the air conditioning system Please read over the entire set of instruc tions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning If the electric wiring diagram does not appear in this manual please check for the diagram on the indoor unit 1 1 Tools Required for Installation not supplied 1 Standard screwdriver 7 Hacksaw 13 Torque wrench 2 Phillips head screwdriver 8 Core bits 14 Adjustable wrench 3 Knife or wire stripper 9 Hammer 15 Reamer for deburring 4 Tape measure 10 Drill 16 Vacuum pump For R410A 5 Carpenter s level 11 Tube cutter 17 Manifold valve 6 Sabre saw or key hole saw 12 Tube flaring tool 1 2 Accessories Supplied with Unit S 1 CU AKE31NBU EA Packed in the outdoor unit Labels for inter unit cable and tube CU 1 Reducer 3 8 x 1 2 1 3 Optional Copper Tubing Kit 2 Foamed polyethylene insulation for the specified copper tubes as required to precise length of tubing Wall thickness of the insulation should be not less than 5 16 8 mm Copper tubing for connecting the outdoor unit to the indoor unit is available in kits which contain the narrow and wide tubing fittings and insulation Consult your nearest sales outlet or air conditioning workshop 3 Use insulated copper wire for field wiring Wire size varies with the total length of wiring Hefer to 5 Wiring Instructions for
102. installation and trouble free operation you must Carefully read this instruction booklet before beginning Follow each installation or repair step exactly as shown Observe all local state and national electrical codes Pay close attention to all warning and caution notices given in this manual This symbol refers to a hazard or unsafe practice which can WARNING result in severe personal injury or death This symbol refers to a hazard or unsafe practice which can result in personal injury or prod CAUTION uct or property damage If Necessary Get Help These instructions are all you need for most installation sites and maintenance conditions If you require help for a special problem contact our sales service outlet or your certified dealer for additional instructions In Case of Improper Installation The manufacturer shall in no way be responsible for improp er installation or maintenance service including failure to follow the instructions in this document SPECIAL PRECAUTIONS WARNING When Wiring 0009000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH ONLY A QUALIFIED EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked Highly dangerous electrical volta
103. ion Material 1 5 Additional Materials Required for Installation INSTALLATION SITE SELECTION 5 2 1 Indoor Unit 2 2 Connecting Indoor Units 2 3 Outdoor Unit 2 4 Baffle Plate for the Outdoor Unit 2 5 Outer Dimensions of Outdoor Unit 2 6 Diagram of Outdoor Unit Installation INSTALLATION PROCESS 16 3 1 Embedding the Tubing and Wiring 3 2 Use ofthe Flaring Method 3 3 Flaring Procedure with a Flare Tool 3 4 Caution before Connecting Tubes Tightly 3 5 Tubing Connections 3 6 Insulation of Refrigerant Tubing 3 7 Taping the Tubes 3 8 Finishing the Installation AIR 19 E Air Purging with a Vacuum Pump for Test Run E Pump Down WIRING INSTRUCTIONS 22 5 1 General Precautions on Wiring 5 2 Recommended Wire Length and Diameter 5 3 Wiring System Diagram 5 4 How to Connect Wiring to the Terminal 5 5 Wiring Instructions for the Outdoor Unit TEST c 26 CONNECTING A HOME AUTOMATION DEVICE i uuu 27 INSTALLATION CHECK SHEET 27 CV6233187853 IMPORTANT Please Read Before Starting 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 For safe
104. ip Hz reduction Hz increase prohibit Hz reduction Hz increase prohibit 16 reduction 58 Lue s dee x S Frequency Hz 78 7 2 3 Low Start Current Operation starts at 8 Hz and the start current is less than the normal operating current This prevents the flickering of fluorescent lights or television screens that occurs when ordinary A C units start 7 2 4 Compressor Temperature Control To protect the compressor coil from overheating the operating frequency is controlled based on the compressor discharge temperature CF Trip 230 5Hz every 30 sec reduction 223 2Hz every 30 sec reduction 212 Increase hibit NO gontrol prohibit range Hz reduction Compressor discharge temperature 194 Within the increase prohibit range the range changes to the Hz reduction range 2 Hz every 30 seconds if the compressor temperature rises by 4 F 7 2 5 Control at HEAT Start up If HEAT operation is started when the outdoor air temperature is 59 or below the unit operates at the HEAT start up frequency 70 Hz or above Reset conditions 1 The compressor frequency exceeds the start up frequency of 70 Hz 2 The compressor thermostat is OFF 1 2 3 Frequency reduction for indoor high load control has occurred 4 The outdoor air temperature is above 59 F S 5 The main unit switch on one or more indoor units is set to TEST run 79 8 TROU
105. is at or below the L2 line for 120 minutes The 4 way valve remains ON during defrost The outdoor fan stops and the solenoid valve turns ON allowing the refrigerant to bypass the indoor unit Solenoid valve for hot gas bypass ON The operating frequency during defrost is 80 Hz Frequency is lowered if the current peak cut off function is activated The maximum length of a single defrost operation is 12 minutes For the outdoor heat exchanger temperature conditions for ending defrost refer to Table 1 Indoor fan turns ON After 10 seconds the solenoid valve for hot gas bypass turns OFF When the cold air feel has disappeared the indoor fan starts and gradually increases speed until it reaches the set speed All indicator lamps turn OFF The indoor and outdoor units stop Starts operating in the same operating mode Within 4 hours after operation was stopped it is HEAT and with the same temperature assumed that there has been no significant settings as before operation was stopped change in the indoor and outdoor temperatures and the previous conditions HEAT are stored New operation begins based on the temperature conditions at the time the ON OFF button is pressed 72 Outdoor heat exchanger temperature F 21 2 19 4 Fig 1 Temperature of releasing Defrost operation time Less than 2 minutes Heat exchanger Outdoor air temperature F temperature for releasing
106. ith high humidity or moisture make sure to ground the unit Failure to do so may cause an electric shock Confirm that the component attachment position wiring condition soldering condition and connector connection are normal If not it may cause overheating or fire Confirm that the temperature around the compressor is not too high and then perform the repair work Failure to do so may cause a burn Perform welding work in a place with good ventilation If the work is performed in a poorly ventilated area it might cause a lack of oxygen If the installation plate or attachment frame has deteriorated due to corrosion etc replace it Failure to do so may cause an injury due to the unit falling When the cleaning is to be performed make sure to turn off the power and pull out the plug Touching the fan that is rotating at high speed may result in an injury When the indoor unit is to be removed do not place it on an incline 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 l
107. ject to dew condensation 3 2 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 3 3 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 12 to 20 30 to 50 cm longer than the tubing length you estimate 2 Remove burrs at the end of the copper tube with a tube reamer or file This process is important and should be done carefully to make a good flare Fig 8 16 Before Deburring Fig 8 When reaming hold the tube end downward and be sure that no copper scraps fall into the tube Fig 9 3 Remove the flare nut from the unit and be sure to mount it on the copper tube 4 Make a flare at the end of copper tube with a flare tool Figs 10 and 11 Use RIDGID or equivalent A good flare should have the following characteristics e inside surface is glossy and smooth e edge is smooth e tapered sides are of uniform length 3 4 Caution before Connecting Tubes Tightly a Besure to apply a sealing cap or water proof tape to prevent dust or water from getting into the tubes before they are used b Besure to apply refrigerant lubricant to the matching surfaces of the flare and union
108. ler Over Current Protection Over Heat Protection Run Capacitor Micro F VAC Heat Exchanger Coil Face Area ft m DATA SUBJECT TO CHANGE WITHOUT NOTICE 19 2 3 Other Component Specifications Model No Quantity of Sensor of sensor CU 3KE19NBU Sensor Name BW BN sensor TKS292B CW CN sensor TKS292B DW DN sensor TKS292B gt Resistance ohm 4 5 14 23 32 41 50 59 68 20 15 10 5 0 5 10 15 20 Temperature F Model Quantity of Sensor Sensor Name of sensor CU 3KE19NBU CU 4KE24NBU CU 4KE31NBU AU LE LY LL LII LLL LLL TET TT E NL LL LI Pt LIN LL LLL LL LLL LLL LN LLL LLL ET gt Resistance ohm d 32 50 68 86 104 122 140 158 176 194 0 10 20 30 40 50 60 70 80 90 Temperature F 20 3 DIMENSIONAL DATA Outdoor Unit CU 3KE19NBU 11 17 32 23 15 16 35 7 16 900 5 11 32 21 29 1 8 740 Wide tube service valve dia 3 8 9 52 x 3 Narrow tube service valve dia 1 4 6 35 x 3 5 29 32 2 27 32 2 3 4 2 15 16 2 3 4 4 7 16 Unit inch mm 852 0 0010 11200 0 Outdoor Unit CU AKE24NBU 23 15 16 5 11 32 11 17 32 35 7 16 900 2 15 16 Wide tube service valve dia 1 2 12 70 x 1 Narrow tube service valve dia 1 4 6 35 x 4 Wide tube service valve dia 3 8 9 52 x 3 5 29 32 2 27 32 2 3 4 2 3 4
109. maintain performance Install in a location where the dimensions indicated by lt are ensured and where 2 or more faces of the unit are unobstructed In principle the top direction should be unobstructed Power breaker YW Uf Uy Z Uff Uf if LM Uy 7 7 Z 2 Z Z m 2 Z Z UU Wf LL YM 77 1111111117777 Z Z Uf Wy m 10 77 Wy Z RS SES Ground Fasten with anchor bolts Wire not not provided 3 8 or M10 4 locations provided 15 Access panel Wall mounted types Ceiling mounted cassette types 3 Installation Process 3 1 Embedding the Tubing and Wiring Do not connect tubes to locations that are embedded Be sure to bind refrigerant tubing and inter unit cables together with vinyl tape The power cable must be obtained on site 12 Less than 85 ft AWG American Wire Gauge Be sure to apply the provided labels to both ends of the inter unit cables to prevent miswiring Securely seal the end of embedded tubing with vinyl tape in order to prevent dirt or moisture entry In order to prevent insulation breakdown and ground faults do not allow the wire ends to come in contact with rainwater or be sub
110. mbined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 46 Outdoor Unit CU 4KE31NBU Indoor Unit CS MKE9NBAU x 1 ll Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart T Boum HE psig MPaG Low pressure at wide tube service valv High pressure at wide tube service valve 86 95 104 41 50 59 68 77 25 30 35 40 C5 6 00 15 20 25 Outdoor air temperature F Outdoor air temperature F 2 7 current diii is chart 2 Operating current performance chart Operating current A Operating current A 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 O 68 0 20 o LL LL 64 4 18 o 5 60 8 16 5 5 57 2 14 5 noor ai air tem o 53 6 12 L j 5 50 0 10 NN 5 5 5 5 46 8 42 8 6 77 86 95 104 2 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F
111. meter differ from locality to locality For field wiring requirements please refer to your local elec trical codes Carefully observe these regulations when car rying out the installation Table 6 shows maximum wire lengths for control line and power line and fuse or circuit capacity Hefer to the wiring system diagram Fig 25a or 25b for the meaning of A B and C in Table 6 Refer to your local codes or in the absence of local codes see the National Electric Code ANSI NFPA70 Table 6 Max Power Line Length ft Max Control Line Length ft A B C 412 414 CU 3KE19NBU 85 Max 82 Max Fuse or Circuit Capacity CU 4KE24NBU 85 Max 82 Max CU 4KE31NBU 100 Max 22 AWG American Wire Gauge NE e Be sure to comply with local codes on running the wire from the indoor unit to the outdoor unit size of wire and wiring method etc e Each wire must be firmly connected e No wire should be allowed to touch refrigerant tubing the compressor or any moving part e Be sure to connect power wires correctly match ing up numbers on terminals of the outdoor unit and respective indoor units A D CAUTION e Be sure to connect the power supply line to the outdoor unit as shown in the wiring diagram The indoor unit draws its power from the outdoor unit e Do not run wiring for antenna signal or power lines of television radio stereo telephone se
112. mperature F C 2 M current performance chart 2 Operating current performance chart 7 L 5 5 5 6 5 gt 5 5 O 5 77 86 95 104 25 30 35 40 5 O 9 65 Outdoor air temperature F Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart O CH AME 2 z 60 8 16 8 122 50 Q 57 2 14 113 45 2 2 53 6 12 S 104 40 E E 2 50 0 10 95 35 D 2 5 5 5 46 44 8 o 86 30 E 42 8 6 77 25 77 86 95 104 41 25 30 35 40 5 5 25 Outdoor air temperature Outdoor air i i This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 33 5 1 2 Temperature Charts CU AKE24NBU Outdoor Unit CU 4KE24NBU Indoor Unit CS MKE7NKU x 1 ll Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 8526 Indoor fan speed High fan 230V 60Hz 230V 60
113. n 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 NEVET cnarge a large 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 to 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 9 To prevent the composition of R410A from changing never bleed the refrigerant gas int
114. nding the air conditioner in a way that may block air flow 2 Pa Drain hose AVOID Outside drainage e direct sunlight e nearby heat sources that may affect performance of the Fig 1 unit For wall mounted units e areas where leakage of flammable gas may be expected e placing or allowing any obstructions near the air conditioner inlet or outlet 6 15 cm 2 2 5 cm min e installing in rooms that contain instant on rapid start fluorescent lamps These may prevent the air conditioner from receiving signals e places where large amounts of oil mist exist View e installing in locations where there are devices that Fig 2a generate high frequency emissions DO For ceiling mounted cassette units e select an appropriate position from which every corner of the room can be uniformly air conditioned High on a wall is best for wall mounted types 22 a e select a location that will hold the weight of the unit e select a location where tubing and drain hose have the shortest run to the outside Fig 1 e allow room for operation and maintenance as well as Fig 2b unrestricted air flow around the unit Fig 2a or 2b e install the unit within the maximum elevation difference H1 H2 H3 H4 above or below the outdoor unit and CAUTION AUTION within a total tubing length L1 L2 L3 L1 L2 L3 L4 from the outdoor unit as detailed in Table 3 and
115. nifold valve for air purging If it is not available use a stop valve for this purpose The Hi knob of the manifold valve must always be kept closed e Use a hex wrench of a type to which force can be easily applied 4 With the Lo knob of the manifold valve open and high pressure valve Hi closed completely run the vacuum pump Run the pump until the pressure is 101 kPa 76 cmHg The operation time for the vacuum pump varies with tubing length and the capacity of the pump The following table shows the amount of time required for evacuation Table 5 Required time for evacuation when capacity of 100 liter h vacuum pump is used The required time in Table 5 is calculated based on the assumption that the ideal or target vacuum condition is around 10 mmHg abs 20 min or more 5 With the vacuum pump still running close the Lo knob of the manifold valve Then stop the vacuum pump Fully close the low pressure valve and stop the vacuum pump Wait 1 2 minutes and check that the manifold gauge pointer does not return If it does return find and repair the leak then apply the vacuum again 6 With a 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 Be sure to completely insert the hex EAT wrench before attempting to turn the valve 7 With a standard
116. nt 9 8 Retro Fitting Existing Systems 9 8 1 Use of Existing Units 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 9 8 2 Use of Existing Tubing e lf 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 94 APPENDIX A INSTALLATION INSTRUCTIONS CU SKE19NBU CU AKE24NBU CU 4KE31NBU 852 6 4190 584 00 2 A 1 INSTALLATION INSTRUCTIONS Split System Air Conditioner This air conditioner uses the refrigerant R410A External diameter of service port R410A 5 16 Model Combinations Combine indoor and outdoor units only as listed below Model No Indoor Unit Outdoor Unit CS MKE7NKU CU 3KE19NBU CS MKE9NKU CU 4KE24NBU CS MKE12NKU CU 4KE31NBU CS MKE18NKU CS MKE24NKU CS MKE9NB4U CS MKE12NB4U CS KE18NB4UW Power Source 60 Hz single phase 230 208 VAC Combination example Indoor unit B Indoor unit C Outdoor unit Indoor unit D 85264190584002 2011 Panasonic Contents Page IMPORTANT Please Read Before Starting 2 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 Type of Copper Tube and Insulat
117. ntroller signals are being positively received 27 DC1111 0
118. o need to further increase the compressor capacity and the frequency is stabilized or lowered BEEN Control conditions Unit operation Explanation The thermostat turns ON The indoor unit is stopped The unit operated before and the temperature of HEAT When defrost operation begins frost has formed on the outdoor unit when the ambient air temperature is low Defrost release STOP Clean defrost Defrost is performed when the outdoor unit is stopped and the temperature of the outdoor unit coil is at or below the L1 line Refer to Fig 1 Operation is restarted within 4 hours only when AUTO mode is selected with the remote controller Operation starts after 4 hours or more have passed the indoor heat exchanger is relatively warm Therefore the fan speed may start at the set fan speed at the same time that the thermostat turns ON Non stop defrost Defrost operation begins based on outdoor heat exchanger temperature and outdoor air temperature conditions Indoor fan Stopped Outdoor fan s Stopped Non stop defrost Refer to Fig 1 Compressor 80 Hz 1 After HEAT operation begins the temperature of the outdoor heat exchanger is at or below the L1 line for 35 minutes 4 way valve Remains ON If outdoor air temperature is less than 26 6 F Operation lamp Red and orange ON the time is 48 minutes alternately 2 After HEAT operation begins the temperature of the outdoor heat exchanger
119. o the atmosphere while transferring the refrigerant Fig 3 Do not use the refrigerant if the amount in the charging cylinder is less than 20 92 Configuration and characteristics of cylinders lt 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 Charging cylinder Open Refrigerant cylinder Fig 3 9 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 e Never release the gas to the atmosphere recover residual refrigerant using the refrigerant recovery unit for R410A instead e Do not reuse the recovered refrigerant because its composition will have been altered 3 Welding leaking points e Confirm again that no residual refrigerant exists in the unit before starting welding e Weld securely using flux and wax for R410A e 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 pressu
120. or 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 symbol 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 e 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
121. or value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6t 7 5m If the tubing length is different the performance chart will vary 34 Outdoor Unit CU AKE24NBU Indoor Unit CS MKE9NKU x 1 Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart 5 z L I Ld 5 Pe Qum mm 2 Dem IIIIIIIIIAIIIIIIIIAA Low pressure at wide tube service valve High pressure at wide tube service valve 25 30 35 40 C5 0 8 10 18 80 25 Outdoor air temperature F C Outdoor air temperature F C 2 Operating current performance chart 2 Operating current performance chart Kian m gt 8 5 ag SEIT T II 41 50 59 68 C5 0 6 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart I gt m 140 60 o E s y Er o 131 55 beso 64 4 18 9 122 50 ss 60 8 16 a a 113 45 L g 4 57 2 14 4 104 40 3 3 5 53 6 12 95 35 E E 50 0 10 S 86 30 o o E E 46
122. osition 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 e 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 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 88 9 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 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 Dia 1 2 12 7 mm 0 to 0 5 mm Dia 5 8 15 88 mm e Size of flare Flare tool for R410A Conventional flare tool R22 e Tubing
123. rating current performance chart Operating current A 41 50 59 5 0 5 10 15 20 25 Outdoor air temperature F 3 Indoor discharge air performance chart 140 60 Indoor discharge air temperature F o A 2 41 50 59 6 5 0 5 10 15 20 25 Outdoor air temperature F C e This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 32 Outdoor Unit CU 3KE19NBU Indoor Unit CS KE12NBAUW x 1 Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart 174 amp 12 Ec Try gt sw s fool titi z 9 160 8 3 3 Ea oboe Z 1 0 Lr 132 3 09 5 77 86 95 104 3 32 25 30 35 40 C5 0 do 5 9 Outdoor air temperature F C s air te
124. reakers and fuses will not be tripped e Operation can continue during this period with somewhat reduced heating or cooling capacity e Operation at normal capacity is restored when the cause of the current rise is eliminated Description of function Example of operation for heating 20 Power Point C 1 Point 16 6 Point Target f ot tt efli frequency Frequency Frequency Stops operation Approx 3 minutes Operates at the target frequency at Point A and below e Stops increases to the frequency between Points A and B e Reduces the frequency by 1 Hz per 0 5 seconds when Point B is exceeded e Stops operation and restarts it appoximately 3 minutes later if Point C is exceeded May operate when sudden voltage fluctuations occur Indicates trouble 1 Automatic frequency control The operating frequency is reduced automatically or operation is stopped in order to control the operating current so that it is at or below the values shown in the table below 20A HEAT COOL Point C peak cut trip 20 0 20 0 Point B Hz reduction 17 0 17 0 Point A Hz increase prohibit 16 6 16 6 MeH During defrost operation the COOL current setting value is used 2 Current control The operating frequency upper limits shown in the figure below are established for frequency reduction and increase prohibit Current A Example of operation during cooling Tr
125. recautions before Performing Inspection or Repair 80 8 2 Trouble Diagnosis by Error Monitop Lamps 81 8 3 Checking the Outdoor System a 82 8 4 Trouble Diagnosis of Each Part a 83 8 5 Trouble Diagnosis of Fan Motor dct Riu 87 Page 9 REFRIGERANT R410A SPECIAL PRECAUTIONS WHEN SERVICING UNIT 9 1 Characteristics of New Refrigerant R410A 88 9 2 Checklist before Servicing uU E 89 9 3 Tools Specifically TOF R410A 90 9 4 Tubing Installation Procedures eaae iain tritt inet 90 9 5 In Case of Compressor Malfunction 91 9 6 In Case Refrigerant is Leaking tec epa dates 93 9 7 Charging Additional Refrigerant 94 9 8 Retro Fitting Existing SUSIONIS 94 INSTALLATION INSTRUCTIONS
126. rized 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 minutes 6 Recharging e Recharge unit in the same manner explained on the previous page 5 Recharging 93 9 7 Charging Additional Refrigerant 9 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 N CAUTION Never charge additional refrigerant if refrigerant is leaking from the unit Follow instructions given in 9 6 In Case Refrigerant is Leaking and completely carry out repairs Only then should you recharge the refrigera
127. rom cooling opration to low ambient cooling operation the compressor is stopped for 150 seconds temporarily e When the mode has been switched to low ambient cooling operation the outdoor fan speed is lowered as the outdoor air temperature falls Outdoor fan speed rpm Outdoor air temperature When the outdoor air temperature reaches 62 6 F 17 C or more during the low ambient cooling operation the operation mode is switched to cooling operation The following protective actions are available to prevent the compressor from operating with abnormal loads At that time they initiate thermo off stopping the outdoor unit of the air conditioner Outdoor air temp F C 14 10 8 6 13 Compressor Indoor fan 76 7 2 Protective Functions The numerical values such as temperature frequency time and current in parentheses are an example of CU 4KE31NBU and the values are different from the other models 7 2 1 Defrost Detection and Release 1 Non stop defrosting Defrosting sequence 4 way valve ON Defrost detection occurs in either of the following cases he temperature of the heat exchanger remains at or below the L1 line for 35 minutes after the start of HEAT operation The temperature of the heat exchanger remains at or below the L2 line for 120 minutes after the start of HEAT operation Heating operation Outdoor heat exchanger temperature F
128. s to the indoor and outdoor unit tubing connectors to prevent errors in connections Be sure to match refrigerant tubing and electric wiring between indoor and outdoor units 3 6 Insulation of Refrigerant Tubing IMPORTANT To prevent heat loss and wet floors due to dripping of con densation both tubes must be well insulated with a proper insulation material The thickness of the insulation should be a minimum 5 16 8 mm Fig 16 B For wall mounted units After connecting the refrigerant tubing to the outdoor unit and performing a leak test on the connecting part insulate it with the tubing insulation Fig 17a E For ceiling mounted cassette units Wind the insulation tape around the flare nuts at the tube connections Secondly cover up the tubing connections with the flare insulation 1 8 T3 supplied Then wind the other flare insulation 3 16 T5 supplied Finally fasten the insulation at both ends with the supplied vinyl ties Fig 17b Insulation material The material used for insulation must have good insulation characteristics be easy to use be age resistant and must not easily absorb moisture 18 Torque wrench Indoor unit Spanner Outdoor unit Fig 15 Insulation Thickness Min min 5 16 5 16 8 mm 8 mm Fig 16 Insulation Fig 17a Insulation tape supplied Flare insulation 3 16 T5 supplied lt insulation 1 8 T3 supplied
129. screwdriver turn the wide tube service valve stem counterclockwise to fully open the valve 8 Turn the narrow tube service valve stem counter clockwise to fully open the valve 9 Loosen the vacuum hose connected to the wide tube service port slightly to release the pressure Then remove the hose 10 Leak test all joints at the tubing both indoor and outdoors with liquid soap Bubbles indicate a leak Be sure to wipe off the soap with a clean cloth CAUTION If a CFC gas detector is used use a special detector for HFC refrigerant such as R410A and R134a 20 11 Replace the flare nut on the wide tube service port and fasten the flare nut securely with an adjustable wrench or box wrench Next mount the valve cap and tighten it with a torque wrench the cap needs to be tightened with the torque of 180 Ibs in 200 kgf cm This process is very important to prevent gas from leaking from the system 12 Test run the air conditioner See page 26 14 If there is no leakage stop the air conditioner 15 Wipe off the soap on the tubing This completes air purging with a vacuum pump and the air conditioner is ready for actual operation Pump Down 2 13 While the air conditioner is running apply liquid soap to check for any gas leaks around the service valves or caps 4 In order to protect the earth s environment be sure to perform pump down to recover refrigerant gas without releasing it into the atmosph
130. tdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart LT 140 60 lt o 131 55 M 9 122 50 sr 30 Hr Ir tem im a 113 45 EHE 104 40 T a E Em H A S 95 35 o 86 30 77 25 41 50 59 6 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 36 Outdoor Unit CU AKE24NBU Indoor Unit CS MKE18NKU x 1 Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart E 82 gt gt Oo 578 gt gt o D ga E 5 wl d 506 H z z tS 2 2 434
131. ter 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 ern e The above tools specifically for R410A must not be used for R22 and R407C Doing so will cause malfunction of the unit e 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 9 4 Tubing Installation 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 S32 For details on tubing installation procedures refer to the installation manuals attached to the indoor unit and outdoor unit 90 9 5 In Case of Compressor Malfunction CAUTION 9 Should the compressor malfunction be sure to make the switch to a replacement compressor as quickly as possible e Use only the tools indicated exclusively for R4
132. the indoor and outdoor unit control circuits however the unit remains stopped B EIL HEAT The ON OFF operation button on the remote controller is pressed The ON OFF operation button on the remote controller is pressed The room temperature has reached the desired temperature The thermostat turns OFF The indoor and outdoor temperatures are high If automatic operation mode has been selected with the remote controller operation begins in HEAT SENSOR DRY or COOL mode depending on the room temperature and outdoor temperature at the time operation starts V Positioning of the outdoor unit electric expansion valve is performed This applies in the case of automatic HEAT COOL operation Depending on the operational mode refer to the HEAT SENSOR DRY or COOL item Operation lamp illuminates Indoor fan is stopped to prevent cold air from being emitted Outdoor unit begins operating after forced stop is canceled When the indoor coil temperature rises the compressor starts the outdoor fan starts and the indoor fan changes from LL to the set fan speed When the frequency reaches Hz frequency increases are stopped for a period of 8 seconds Refor to Table 2 Freguency control The frequency then increases The indoor temperature and the remote controller temperature setting are approximately equal The indoor fan is stopped In order to protect the compressor the
133. the outdoor control circuit board connector when power is being supplied to it The controller will be damaged 2 Fuse Check it visually or the continuity with a tester 3 Compressor Check for an open circuit in the compressor coil winding 4 Compressor protective sensor compressor discharge temperature thermistor Check that the senseor is securely contained in the thermostart holder 5 4 way valve Short circuit the T RUN terminal to the COM terminal of TEST T RUN terminals Perfrom a test run of the unit alone and check whether the 4 way valve inside the outdoor unit produces a click sound 6 Coil thermistor Check that the sensor is securely contained in the thermostat holder 84 7 Electric expansion valve e When replacing the electric expansion valve and coil be sure to attach the connectors in the correct positions Labels are applied to the valve body and coil corresponding to the connector colors to identify them Use a multi meter to measure the voltage 12 V e When the power is turned ON the needle will move in the following seguence in approximately 10 to 20 seconds for Controller check No voltage on circuit board Voltage varies each point Model No CU 3KE19NBU MVO MV1 MV2 CU 4KE24NBU CU AKE31NBU MVO MV1 MV2 Check the illumination Check the coil resistance Approx 46 4 ohm Check the resistance between the gray lead wire and the oth
134. thickness of the insulation 5 16 8 mm Min S 16 8 mm should be a min 5 16 8 mm After a tube has been insulated Narrow tube Wide tube never try to bend it into a narrow CAUTION curve because can cause the tube to break or crack 26 5 PERFORMANCE DATA 5 1 Temperature Charts 5 1 1 Temperature Charts CU 3KE19NBU Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE7NKU x 1 ll Cooling Characteristics ll Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart Su gt 506 ge 8 35 o e 8 8 s Tu 2 2 362 U E a L 4 053 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F Outdoor air temperature F 2 ue current A BEN chart 2 Operating current performance chart Dm A 5 e lt 4 E E 6 5 S O 3 5 2 Tf 86 95 104 4 50 59 25 30 35 40 5 0 5 15 20 25 Outdoor air temperature F Outdoor air temperature F 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 O 131 55 122 50 113 45 i 104 40 D 95 35 86 30 o 77 25 50 59 C5 0
135. to connect wiring to the terminal a For Indoor Unit 1 Cut the wire end with a cutting pliers then strip the insulation to expose the wire about 9 32 7 mm See the label Fig 26 near the terminal plate 2 Using a screwdriver loosen the terminal screw on the terminal plate 3 Insert the wire and tighten the terminal screw com pletely using a screwdriver b For Outdoor Unit For solid core wiring or F cable 1 Cut the wire end with a cutting pliers then strip the insulation to expose the solid wire about 15 16 25 mm Fig 27 2 Using a screwdriver remove the terminal screw s on the terminal plate 3 Using the pliers bend the solid wire to form a loop suitable for the terminal screw 4 Shape the loop wire properly place it on the termi nal plate and fix it securely with the removed termi nal screw using a screwdriver For stranded wiring 1 Cut the wire end with a cutting pliers then strip the insulation to expose the stranded wiring about 3 8 10 mm and tightly twist the wire ends Figs 28 and 29 2 Using a screwdriver remove the terminal screw s on the terminal plate 3 Using a ring connector fastener or pliers securely clamp each stripped wire end with a ring connector Fig 28 4 Place the ring connector wire and replace and tighten the removed terminal screw using a screw driver Fig 30 24 Special washer b Fig 28
136. uation fan operation at a fan speed that does not cause a chilly feeling The room temperature is DRY B operation 59 F or higher and is slightly too cold 1 The indoor fan changes between Low The compressor operates on a 3 minutes ON and LL very low over a 6 minute cycle 6 minutes OFF cycle to prevent the room This is 1 f fluctuation fan operation temperature from dropping too much V 2 After appoximately 3 minutes the compressor turns OFF the outdoor fan turns OFF and the indoor fan turns OFF S 3 After approximately 6 minutes the conditions return to 1 The room temperature is Monitoring operation begins When monitoring operation begins the below 59 F compressor stops and the indoor fan operates at LL very low speed 74 1 f fluctuation fan 250 T Bp p B 200 I I 1 I I r I I I I I I r I I I I I I r I I I I I I r I I I I I I r I I I I I 1 r I I I I I r I I I I 1 r I I I I I 1 r I I I I r I I I I 150 Step pu ence Me UIS PITT Peg ee ee SG age CLITA V AS 100 6 minute cycle M Fig 2 75 Low Ambient Cooling Operation gt When the outdoor air temperature reaches 57 2 F 14 C or less during the cooling operation the operation mode is switched to low ambient cooling operation e When the mode is switched f
137. uble 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 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 2 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 motor connectors on the outdoor unit controller 3 locations Measurement location 1 Vm Gnd Between pin 1 and pin 4 DC 230V or more 2 Vcc Gnd Between pin 5 and pin 4 DC 14V or more 3 Vsp Gnd Between pin 7 and pin 4 After fluctuating 4 times between DC 1 7 to 6 1V 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 Vm red Pin 2 Not used Pin 3 Not used Pin 4
138. ue in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 39 Outdoor Unit CU 4KE24NBU Indoor Unit CS MKE12NBAU x 1 Cooling Characteristics RH 46 Indoor fan speed High fan 230V 60Hz 1 Low pressure performance chart em Gey AE LS LEE Hd um N psig MPaG Low pressure at wide tube service valve LL pe AN VT Outdoor air temperature F C 2 Operating current performance chart Cem e pum lt 5 5 aaa c E p a Outdoor air temperature F C 3 Indoor discharge air performance chart 68 0 20 O 64 4 18 Oo iB 50 0 10 Indoor discharge air temperature F Outdoor air temperature F C Heating Characteristics RH 85 Indoor fan speed High fan 230V 60Hz 1 High pressure performance chart psig MPaG o BI S LUTTE Ze 5 0 8 0 5 80 5 Outdoor air temperature F High pressure at wide tube service valve 2 Operating current performance chart Operating current A 41 50 59 5
139. um Disconnect switch may be required by national or local codes CAUTION Always comply with national and local code requirements 4 indoor units with CU AKE24NBU CU 4KE31NBU Disconnect Switch Field supply OUTDOOR UNIT 230 208V RED B Terminal 12P 230 208V u Grounding line Disconnect switch B Field supply gt INDOOR UNIT Terminal 20 INDOOR UNIT Terminal hr no S N N 8 lt lt UNIT B 230 208V Grounding line 9 Disconnect switch Inter unit Field supply power line N O Z 5 e S NI g x E 230 208V TY 5 2 q 9 230 208V B 3 EP e m 2 Grounding line 230 208V o Disconnect switch Q 2 5 Field supply e 5 E 2 E 230 208V E 9 0 OE 230 208V sc z 2 E Grounding B line E Fig 25b 5 4 How to Connect Wiring to the Terminal Loose wiring may cause the N terminal to overheat or result in unit malfunction A fire hazard may also exist There fore 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 How
140. urfaces 2 Finish the edges of the windbaffle to avoid cuts or injury 3 Drilling of holes must be carefully done so that no damage is caused to external or internal parts of the unit Particular care must be taken that drill chips do not drop into the unit 13 2 5 Outer Dimensions of Outdoor Unit 1 CU SKE19NBU 23 15 16 5 11 32 gt gt A NL ON N r ES x tss Y 2 CU AKE24NBU 23 15 16 5 11 32 A N 3 CU 4KE31NBU 23 15 16 12 19 32 13 19 32 14 17 32 gt A 35 7 16 900 2 29 32 29 1 8 740 Fig 6a 5 35 7 16 900 V 23 32 1 13 16 2 1 16 2 29 32 Fig 6b A 35 7 16 900 Se f UU Fig 6c 14 2 27 32 5 29 32 2 3 4 11 2 27132 29 834 2 3 4 EEEEEEEHEEEEEEEEEE IH LL Service valve on narrow tube side Outer diameter 1 4 6 35 Service valve on wide tube side Outer diameter 3 8 9 52 st CN
141. vice valv High pressure at wide tube service valv I CUL T L am j _ get tt aie 104 41 50 59 68 77 40 C5 6 00 15 20 25 Outdoor air temperature F C Outdoor air temperature F 2 Operating current performance chart 2 Operating current performance chart EEREN EL LL Lese 11 AS AF K N eo M 9 NN 228 LO 1 0 of NE SOY oO oe 5 Y Operating current A Operating current A 77 86 9 104 41 50 59 68 77 25 30 35 40 C5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart Kiom HHHH O emp 86 F indoor ait t Indoor discharge air temperature F Indoor discharge air temperature F WE LL LLL 50 86 30 mes 77 86 95 104 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending the indoor unit type e Check each performance value in test run mode Electrical performance values represent a co
142. x Power Supply 230V Single Phase 60Hz Cooling Capacity RATING CAPACITY 18 600 BTU h AIR FLOW RATE 777 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F F WB 65 75 85 95 105 115 18 3 23 9 29 4 35 0 40 6 46 1 TC TC 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 50 Outdoor Unit CU 3KE19NBU Indoor Unit CS MKE12NB4U x 3 Power Supply 230V Single Phase 60Hz Cooling Capacity RATING CAPACITY 17 400 BTU h AIR FLOW RATE 706 CFM INDOOR ENT TEMP F AMBIENT TEMP 105 115 T E35 T m 40 6 46 1 19 120 18 520 17 870 17 400 16 620 15 760 9 690 9 420 9 140 9 000 8 730 8 460 TC 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

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