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SERVICE MANUAL - Mitsubishi Electric Cooling & Heating

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1. fluo Jeddoo een TOOIAWAONISYRARY 167 EECHER mai 191 10 ENT green UOLSINUSHL ANIL JOUVHOSIC ZOLA 4 IN3OITIINI 28770 SUDO IU WANUOISNVUL 1081 YOLSIWUSHL 1809530 oz 391430 Y3MOd LNSOMTISINI 297 HOISISNVHIN3MOdONIHOIMS L t NOWLOSLOUd INDIO 892149214 61 NOLLdOJM3IVdH 1804440 H Orta SUMIM TYNINGAL _ 2181 YOLOWNWS 1 ISNA 10631083 10 3 He OPIS Joopur eui DON WOLSINYSHL ANAL qu MWOSS3HdWOO H INGON 2000 9071980 SALON 1v3H T023AWANOISNVdX3 Ad SOLIOvdvO 9NIHLOONS 99 299190 INYN SITE INYN 1O8NAS JNYN 8 209 eseud 002 802 SIYM 9NLLO3NNOO F pg NUS AEN I ma JN HN M mm o st UO POR ER M ala 7 re AER as Sichere o T mm E 0 goo 6 5 6 66 Wien 5 6 SSS zem yc xt GI VCLNO RON 9 9 9 D Qquvog 2d YILYIANI H a Wal au EE i 1 Aldans L 227 15556 nm annoys 210940 TL iid z en E T T 621 AL _ T I on Ke N M NEN PIT yg
2. DC 260 325 V T3 15 AL 250 V C AC 208 230 V Fuse F801 250V 3 15A R V coil CN721 208 230 pt e Bur iio VAC Ty 32 Ma 3 NS G D Elo ama Y 2 gt 2 o o lt o a o ae T D en Jil 5 Fuse F901 Ge ET HC m Nui 13 15 AL 250 V m im NL o i an mets o Tj im M aS i a re d ELI D k cxe2 Output to Wc Poser ora drive e j NES d m compressor LE 2 ae AC 208 LDU one SH 3 o Fo Ka id 230 V LDV T RS z i LDW Om Bie E a HRS SZ D INNS T nm Ze go TE E Ee Ce ee 5 ER Sud b E ux RUE COIN H 2 Ze a vos 19 jg EU d DN D I i s m al Y t oe zr elo 1 D Hee Ar Ead 4 BE M loo oR d TIR ini fe T ong gu AUCH Sa Rd 55 m mpg Pen dum U umm N Bez fug Qoa Opa Dages 33 Le on f 50 25 5 5 LED LEV Jumper wire for Jumper wire ES E S95 To s 8 connector changing defrost for pre heat x o0 95 5E ge 5 an CN724 setting JS control setting Front side of unit Z 50 Er Ec JK O DES 73 LE oz Le Or t z Goo o9 c oo o5 Es oZ 29 ESQ 3236 923 Sc 55 LF E O 2 oL X of 5 2 ee t E 2 0 ETH GES 35 288 59 Sb 226 og a S x Defrost thermistor RT61 Ambient temperature thermistor RT65 Outdoor heat exch
3. Service port m V RT65 Defrost is thermistor RT61 Capillary tube Flared connection O D 0 118 x I D 0 079 x 9 7 16 LEV N 23 0 x 22 0 240 gt lt H P kj 000 Ka Stop valve with strainar Refrigerant pipe 21 4 with heat insulator SUZ KA12NA SUZ KA15NA Refrigerant pipe 03 8 KA12 Refrigerant pipe 21 2 KA15 4 way valve with heat insulator 8 Service port Ambient i temperature thermistor 4 Strainer 100 R V coil heating ON cooling OFF Refrigerant flow in cooling gt Refrigerant flow in heating Unit inch mm Sf j z i Outdoor heat s St 7 with GE port temperature Geer Muffler Outdoor Flared connection heat temperature ch d I pours Service port T Compressor Service port Defrost imperet thermistor RT65 EN RT61 i L Capillary tube 0 118 x I D 0 071 x 23 5 8 Capillary tube 03 0 x 21 8 x 600 x2 Strainer Flared connection O D 0 118 x I D 0 079 100 x 9 7 16 LEV 23 0 2 0 x 240 lt GE Fa eating SH Ee JUL gt lt cooling OFF Stop valve Refrigerant pipe 21 4 with heat insulator with strainar Refrigerant flow in cooling gt Refrigerant flow in heating SUZ KA18NA Refrigerant pipe 21 2 with heat insulator Flared connection D 4 Service
4. 005016 ASN 1063 10831073 SALON HOLSINYSHL ANAL WOSS3HdWOO OW 2I00CH 2000 u39NvHOX3 1v3H YOOGLNO 109 Ai 9NIHLOONS 99292 192 JYIM 9NLLO3NNOO E N TOINA EE TOSWAS OINAS Wl o5 2 09 eseud A31 JN Q pg NS 8 SIYM 9NLO3NNOO Sos aro OL 4 05 Cu em wann 415 i i SIYM ONLLOANNOD ai SCH ETE H preste eT hoe 186 9 Cri Dem Tes ae es LINN 8000N 97901 19079 o 6 6 6 I 55 z ZE6NO s e 6 6 6 SO NOH 19 01 2 YC4NO LY9NO Y9NO CvY9NO E LEGNO T T 1 5 db TET LINOYIO H d nal se 4 yi SE 0 60H 5 T 9d HS3183ANI L e Ke L064 if ZHO9 aseud N M p JOER is besa AlddNS is pv 1085 SluvdNOWdO _ 1081 ES 20801 CODE yg 4 u 1 2 le gece ma rm One lt MIA NO D ss Or ei H9 4 SUZ KA18NA 6 REFRIGERANT SYSTEM DIAGRAM SUZ KA09NA Refrigerant pipe 03 8 with heat insulator 4 way valve e Unit inch mm lt i Outdoor heat 2 7 St with NEN K temperature Muffler Outdoor ermistor Flared connection Deag i heat RT68 temperature exchanger I thermistor RT62 i
5. Bo od S S ZS ZS o o SE o o o T ri LEN T3 15AL250V Fuse F901 m 0 T315AL 250V BO i m o duo C Bom d Di 00 0 reg i ero o o o 666 i aq OS 2 SP su Output t chus MAI e utpu ele E o og d St 4 4 drive Sa sse e s Q ED C 4 Bue ot compressor JE 71 3 tX im m oe em AC 208 LDU EN p io cees o f o ki RO D Epi 1 o 82 o eB mm kent 2 0 0 230V LDV T wed E iie g 4 qoem uM SE i e Hr nM n LDW dg tos JE TV 0295 HH TRAD HIE a DA KC SES i C al PO HY WIE D Wer S zT EID ynnbA HU IDE P E Av rss As te Ok I gt 5 of H NIE UK ige E af o oo B csap ER MAA 5 M O LOU er HB e Gd ZEN Se x ug oe QUID i in 8 TT RUE Ka Ak EZ G SE 55 5 m amp B RX co 9 S E d c T Di FE DO D aN SZ o aoe Q ab eS e or aS 5 amp Front side of unit S EX Sat EL 07 zs eg 5 d of 2 20 95 GES x Oe EES EO oz D gt L9 E p amp o c o c co deg cio O oO 9 Eu Eu G t 32 ogy 25 Sec LS Ze UT Bo SEO Or G25 5 G5 E o Z cto 5 oQ p ke __ E
6. Inverter check mode 2 LED is lighted during normal operation The flashing frequency shows the number of times the LED blinks after every 2 5 second OFF Flashing Example When the flashing frequency is 2 0 5 second ON The connector of compressor is disconnected inverter check mode starts LED is illustrated at the right figure Refer to 10 6 1 m 0 5 second ON 2 5 second OFF 16 Check if the connector of the compres Sor is correctly connected Refer to 10 5 How to check inverter compres sor Inverter P C board Parts side LED i Y Flashing BS 10 4 TROUBLE CRITERION OF MAIN PARTS SUZ KAO9NA SUZ KA12NA SUZ KA15NA SUZ KA18NA Part name Check method and criterion Defrost thermistor RT61 Measure the resistance with a tester Fin temperature POM thermistor RT64 Refer to 10 6 Test point diagram and voltage 1 Inverter P C board for the chart of thermistor Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 Measure the resistance with a tester Before measurement hold the Discharge temperature thermistor with your hands to warm it up thermistor 2 Refer to 10 6 Test point diagram and voltage 1 Inverter P C board for the chart of thermistor Measure the resistance between terminals with a tester Temperature 14 104 F 10 40 C Normal Q 9 12 15 1
7. Select setting No 03 remote controller fixed Use D and Example Enter the setting Selecting room temperature Press detection position YES End function display x Press and at the same time The above procedure must be carried out only if changes are necessary 30 Operating Procedure D Check the function selection settings Changing the function selection settings for each mode will change its relevant mode function Perform steps through to check all the function selection settings and write down the current settings in the Check column of the function selection Table 1 gt in the chapter 11 1 and then change the settings as necessary For the initial settings refer to the Table 1 in the chapter 11 1 The following is the procedure to operate the remote controller internal sensor 9 Turn off the remote controller 9 Set the outdoor address Hold down 2 buttons simultaneously for 2 seconds the amp FILTER Press the CLOCK buttons C7 _A_ to select the desired address The address changes from 00 to 15 and TEST buttons to set the modes 01 through 14 and the 9 C and TEST buttons to set the modes 15 through 28 The will flash for a while and show as below EUHCTION Address SELECTION D hi D display section 4 e e If the FUNCTION SELECTION and temperatu
8. LED blinks 6 times Even when the inverter P C board or the outdoor electronic control P C X3 board is normal LED blinks 6 times after 3 minutes and S3 1 y Turn ON the power supply Yy Is the bus bar voltage of the inverter P C board or the outdoor electronic control P C board normal Refer to TEST POINT DIAGRAM AND VOLTAGE in this manual Check of power supply Refer to 10 5 No Yes y Does the LED on the inverter P C board or the outdoor electronic control P C Replace the inverter P C board or the outdoor board repeat 3 6 second OFF 0 8 second ON quick blinking X3 No electronic control P C board 2 Lighted WS Ge Ot X2 Be careful of the residual voltage of smoothing lighted capacitor Turn OFF the power supply Remove the short circuit between outdoor terminal Turn ON the power supply ock S2 and S3 Y Check the wiring If there are any error of the indoor outdoor connecting wire fated voltage between indoor terminal block 51 and 52 N such as the damage of the wire intermediate connection P 9 o and or poor contact to the terminal block replace the indoor Yes outdoor connecting wire Is there amplitude of 10 to 20 VDC between indoor terminal block S2 and S3 Confirmation of serial signal No Yes Y A Is there rated vol nal block S1 and S2 Turn OFF inverter controlled ligh
9. vere Abnormal short Infinite D Abnormal open NOTE Be sure to zero the ohmmeter before measurement E Check of compressor operation time lt lt Judgement gt gt eConnect the compressor and activate the inverter Then measure 0 second the time until the inverter stops due to over current lt lt Operation method gt gt 1 second P Abnormal Start heating or cooling operation by pressing the TEST button Con failure twice on the remote controller Test run mode 2 seconds Compressor winding short TEST RUN OPERATION Refer to 10 5 Abnormal lt lt Measurement gt gt sees lock out Measure the time from the start of compressor to the stop of Starting defect compressor due to overcurrent C 10 seconds Disconnected connector Abnormal Refrigerant circuit defect Closed valve 10 minutes Normal F Check of compressor start failure Confirm that 1 4 is normal Electrical circuit check 1 Contact of the compressor connector including CN61 2 Output voltage of inverter P C board and balance of them See 10 5 3 Direct current voltage between DB61 and on the inverter P C board 4 Voltage between outdoor terminal block 51 52 Does the compressor run for 10 seconds or Check the refrigerant circuit more after it starts Yes Check the stop valve IS After the compressor is heated with a drier does the compressor start x1 N
10. Intake air temperature Indoor unit Discharge air temperature Intake air temperature Outdoor unit 11 8 ACTUATOR CONTROL SUZ KA09NA SUZ KA12NA SUZ KA15NA SUZ KA18NA 8 1 OUTDOOR FAN MOTOR CONTROL The fan motor turns ON OFF interlocking with the compressor ON The fan motor turns ON 5 seconds before the compressor starts up OFF The fan motor turns OFF 15 seconds after the compressor has stopped running 5 seconds 15 seconds ON _ lt gt Compressor OFF ON S 8 2 R V CONTROL OFF R V coil M Outdoor fan motor OFF Heating LG dng Se E PE T ON Cooling Vndc icd i ego Ee ea E OFF p p T OFF NOTE The 4 way valve reverses for 5 seconds right before start up of the compressor COOL HEAT 5 seconds 5 seconds ON ME i p Compressor T 8 3 RELATION BETWEEN MAIN SENSOR AND ACTUATOR Actuator Outdoor fan Indoor fan motor motor Sensor Purpose Compressor Discharge temperature Protection thermistor f Cooling Coil frost prevention Indoor coil temperature thermistor Heating High pressure protec tion Defrost thermistor Heating Defrosting Fin temperature thermistor Protection Ambient temperature Cooling Low ambient tempera thermistor ture operation Cooling Low ambient tempera Outdoor heat exchanger tem ture operation peratu
11. is detected by compressor current Check stop valve 14 time flash 2 5 seconds OFF Outdoor unit Other abnormality Outdoor unit is defective Refer to 10 2 2 Flow chart of the de tailed outdoor unit failure mode recall function Outdoor unit stops and re starts 3 minutes later is repeated 2 time flash 2 5 seconds OFF Overcurrent protec tion Large current flows into intelligent power module X When overcurrent protection occurs within 10 seconds after compressor starts compressor restarts after 15 seconds Reconnect connector of compressor Refer to 10 5 How to check inverter compressor Check stop valve 3 time flash 2 5 seconds OFF Discharge tempera ture overheat protec tion Temperature of discharge temperature thermistor exceeds 241 F 116 C compressor stops Compressor can restart if discharge temperature thermistor reads 212 F 100 C or less 3 minutes later Check refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV 4 time flash 2 5 seconds OFF Fin temperature P C board temperature thermistor overheat protection Temperature of fin temperature thermistor on the heat sink ex ceeds 167 176 F 75 80 or temperature of P C board tem perature thermistor on the inverter P C board exceeds 158 167 F 70 75 Check around outdoor unit Check outdoor unit air passage Refer to 10 5 Check of ou
12. 3 01 99014 Vou Du aa Lia 09014 Team CU te SLuvdNOWdO _________ 10 3 1081 4 oo 120 90 p QUO SO ien ion WC note X ome tng mg jd WEI SS ma Paya a ee MN MTA Kee E el EE 4 SUZ KA15NA 6199 NOILdONNOLOJLONd AVH HZ YOLSINYAHL ANIL INTIS oi an am Too3NWASNSH3ASH WOISINHSHLdW3INH Oly YOLOWSU m Avis OCH WOISIWSSHLdNWSI3ONVHOSIQ 2914 TINGOW 4 INSOMTSINI 062 Ndi De 104 uo sioyonpuoo Jeddoo esr z YINYOJSNYYL 1081 1503330 19184 IN3OITBINI 20891 Bum YOLSISNYYL YIMOd ONIHOLIMS Lal 99019 99d 5199 1509531 ug JOOPU a4 ae OU Dag epis 100 Y jnoqy Xo018 TWNINMAL 291 81 Mei
13. 430 1919 J030 IN3OITHINI 20801 RE SUD OE MOISISNVHI H3MOdSNIHOIIMS G t NOLLO3LONd LINDUIO 59214 9214 SLuvd NOLLdOJN3LV3H 1509330 H NEE OOS WIEL CQL VEL BOLOWNVi 1 ISNA 1063 1093 1013 1 epis JOOPU y 3noqy YOLSINUSHL ANAL e MOSS3HdWOO N FINGOW 2000 598011980 SALON USONVHOXS 1v3H YOOdLNO 1109 SAWWANOISNVEXS Am YOLOVAVO ONIHLOONWS 69092 3IAVN JOSWAS JNYN TOSWAS JNYN 209 eseud EH SIYM 9NLLO3NNOO f N58 INA YOON OL 175 mag AW JC coly GOIN 8914 voly S3UIM ONILOANNOO a 3 Dy aula 5 3 d o d d Soc sn ENA BO a E SE on 2907 901 0156004 De 5 6 De T tS Zuse E IN CI Ec H SIN W9NO RON YONO cY9NO i QquvO8 2d M31M3ANI 209 eseud c i an sf ne e e 00050 Ad EENE 2 SE Hl nl n OW annoys LINDYIO T 70691 Ee Am wa X18 E 064 FD Sam MA DC ASIN 4 i i none 2 KE Ga IT 083 Ld 1081 D IND S 20801 edo L GA 4 980 PX UCET HERR gt ZA A ma See NYO 10 1 619 NOLdOMOLOSLONd HIH V YOLSINUSHL ANAL INSIGNY oos Gn aa
14. 8 yv U WHT RED BLK Compressor 1 36 1 93 1 52 2 17 0 78 1 11 V Measure the resistance between lead wires with a tester Temperature 14 104 F 10 40 C WHT RED BLK Normal Q Color of lead wire KA09 12 15 Outdoor fan motor RED BLK BLK WHT 28 40 WHT RED Measure the resistance with a tester Temperature 14 104 F 10 40 C V coil 2154 Normal 0 97 1 38 Measure the resistance with a tester Temperature 14 104 F 10 40 C Color of lead wire Normal Q Expansion valve coil WHT RED LEV RED ORN YLW BRN BRN BLU 37 54 17 pT 10 5 TROUBLESHOOTING FLOW How to check inverter compressor Disconnect the connector CN61 between compressor and the intelligent power module IPM Y Check the voltage between terminals Trooz See 10 5 Check of open phase y Are the voltages balanced No Replace the inverter P C board Yes Check the compressor kon See 10 5 Check of compressor Check of open phase e With the connector between the compressor and the intelligent power module disconnected activate the inverter and check if the inverter is normal by measuring the voltage balance between the terminals Output voltage is 50 130 V The voltage may differ according to the te
15. G 5 Detach the welded part of the suction and the discharge pipe connected with compressor 6 Remove the compressor nuts 7 Remove the compressor 8 Detach the welded part of 4 way valve and pipe Photo 5 37 Photo 6 Outdoor heat exchanger tempera ture thermistor Ambient tem perature thermistor Defrost thermistor Photo 7 Screws of the outdoor fan motor Photo 8 Welded part of the discharge pipe Discharge temperature thermistor e Welded part of the suction pipe 38 39 S s MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2010 MITSUBISHI ELECTRIC ENGINEERING CO LTD New publication effective Jan 2010 Distributed in Jan 2010 No OCH467 PDF 4 Specifications subject to change without notice Made in Japan
16. G 1 35Pa 0 14in WG 1 i 1 29 11 1 1 Selecting functions using the wired remote controller First try to familiarize yourself with the flow of the function selection procedure In this section an example of setting the room temperature detection position is given For actual operations refer to steps D to Setting number Refrigerant address Unit number Mode number e T Xa ot 888 22228 G Y E EE Cit OO38E OMENU Sal fe M Lessel omm Gr uu Sek Modes 01 to 14 be activated Gv om by pressing buttons 9 and K PAR 21MAA V OPERATION Joss J ef simultaneously and modes 15to 28 by pressing buttons D D 8 Selecting functions using the wired remote controller D Check the function selection setting Switch to function setting mode X For modes 15 and higher Press and at the same time press and at the same time with stop the remote controller Specify refrigerant address 00 outdoor unit Specify unit No 00 indoor unit Use and Enter the setting Specified indoor unit Press FAN operation Change refrigerant address or unit No Select mode No 02 room temperature detection position
17. G PROCEDURE PHOTOS 1 Removing the cabinet Photo 1 1 Remove the screw fixing the service panel 2 Pull down the service panel and remove it Screws Screw of the 3 Remove the screws fixing the conduit cover of the top Screws of cabinet 4 Remove the conduit cover panel gt the top panel 5 Disconnect the power supply wire and indoor outdoor Ge connecting wire 6 Remove the screws fixing the top panel 4 7 Remove the top panel 8 Remove the screws fixing the cabinet 9 Remove the cabinet the service 10 Remove the screws fixing the back panel 11 Remove the back panel Photo 2 Screw of the conduit cover pe Screws of Service the cabinet panel Conduit cover p Conduit plate 32 OPERATING PROCEDURE PHOTOS 2 Removing the inverter assembly inverter P C board Photo 3 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following connectors Inverter P C board CN721 coil CN931 CN932 Fan motor CN641 Defrost thermistor and discharge temperature ther mistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor CN724 LEV 3 Remove the compressor connector CN61 4 Remove the screws fixing the relay panel Photo 3 5 Remove the inverter assembly Photo 4 6 Remove the screw of the ground wire and screw of the T B support Ph
18. MITSUBISHI ELECTRIC Changes for the Better SPLIT TYPE HEAT PUMP AIR CONDITIONERS SERVICE MANUAL R410A Outdoor unit January 2010 No OCH467 utilized R410A Model names SUZ KAO9NA SUZ KA12NA SUZ KA15NA SUZ KA18NA Service Ref SUZ KAO9NA TH SUZ KA12NA TH SUZ KA15NA TH SUZ KA18NA TH SS Ss Ss SS Cc eu CC Ceu So aS SS eu SS Cc eu Ss SS SSS Ss Ss SS eu Ss Ss Ss Ss SS Ss Ss SS SZS SUZ KA18NA TH NOTE This service manual describes service data of the outdoor units RoHS compliant products have G mark on the spec name plate CONTENTS 1 COMBINATION OF INDOOR AND OUTDOOR UNITS 2 2 PART NAMES AND FUNCTIONSG 2 eere 3 4 OUTLINES AND DIMENSIONS 4 5 WIRING DIAGRAM nee 5 6 REFRIGERANT SYSTEM DIAGRAM 8 GE 11 8 ACTUATOR 12 9 SERVICE FUNCTION ern 13 10 TROUBLESHOOTING eee 13 11 FUNCTION SETTING 29 12 DISASSEMBLY INSTRUCTIONS 32 PARTS CATALOG OCB467 1 COMBINATION OF INDOOR AND OUTDOOR UNITS Outdoor unit Indoor unit Heat pump type SUZ Service Ref 09 KA12NA TH KA15NA TH KA18NA TH Manual N
19. O or GE at oo 450 Ar 204 n 5 lt ZS cO 3c gt E E E 3 SE D 68 5 5 4 5 5 5 Defrost thermistor RT61 Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 200 Fin temperature thermistor RT64 Discharge temperature thermistor RT62 700 Resistance kQ Resistance kQ 0 Eer 0 4 14 32 50 68 86 104 35 790 768 06 71012122 10 4987178094 202 230 248 32 50 68 86 UTE YET Temperature Temperature P Temperature F 28 11 FUNCTION SETTING 11 1 UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER S series only Each function can be set according to necessity using the remote controller The setting of function for each unit can only be done by the remote controller Select function available from the table 1 Table 1 Function selections 1 Functions available when setting the unit number to 00 Select 00 referring to setting the indoor unit number Initial setting when sent from the factory Function Settings Setting No Remarks Power failure Not available automatic recovery Available Approx 4 minute wait period after power is restored Indoor temperature detecting The setting is applied to all the units in the same refrigerant system Indoor unit s internal sensor Data from main remote controller 1 LOSSNAY Not supported connectivity Supported indoor unit d
20. T L lt 2 Charon OMENU oono Zu DAY G 10 2 2 Failure mode table Wired remote controller Output pattern A Errors detected by indoor unit Turn on the power Press the CHECK button twice Set refrigerant address with TEMP button if system control is used Press the ON OFF button to stop the self check Wired remote controller Check code Symptom Remark P1 Intake sensor error P2 Pipe TH2 sensor error P9 Pipe TH5 sensor error E6 E7 Indoor outdoor unit communication error P4 Drain sensor error Float switch connector open P5 Drain pump error P6 Freezing Overheating protection operation EE Communication error between indoor and outdoor units P8 Pipe temperature error E4 E5 Remote controller signal receiving error Fb Indoor unit control system error memory error etc EO Remote controller transmission error E1 E2 Remote controller control board error Output pattern B Errors detected by unit other than indoor unit outdoor unit etc Wired remote controller Check code Symptom Remark E9 Indoor outdoor unit communication error Transmitting error Outdoor unit UP Compressor overcurrent interruption U3 U4 Open short of outdoor unit thermistors UF Compressor overcurrent interruption When compressor locked U2 Abnorma
21. anger temperature thermistor RT68 Fin temperature thermistor RT64 200 Discharge temperature thermistor RT62 0 Resistance kQ SARRA TEERDE NEMEM E CELT sg ERE EXE NET d Ue s RI 0008 b 0 0 0 4 14 32 50 68 86 104 32 90 22 140 a a 200 248 32 50 68 86 104 122 140 158 176 Temperature F Temperature F Temperature F 27 Ooo O SUZ KA18NA Bus bar voltage Smoothing Smoothing Smoothing R V coil capacitor capacitor capacitor Fuse F701 CN721 Back side of unit DB61 C63 C62 C61 f DC 260 325 V T3 15 AL 250 V 208 230 lt VAC Y Fuse F801 AC 208 230 V 250 V 3 15 A E m 2 ar L 8 Ee 7
22. cted or R V coil is open voltage is generated between the terminal pins of the connector although no signal is being transmitted to R V coil Check if CN721 is connected Unit operates COOL mode even if it is set to HEAT mode Disconnect connector CN61 between the compressor and the Is there 208 230 VAC between CN721 intelligent power module and on the inverter P C board 3 Replace the inverter Turn ON the power supply and minutes after the power supply is turned PC board press the TEST button twice HEAT ON mode Yes Replace the 4 way valve Unit operates HEAT mode even if it is set to COOL mode Disconnect connector CN61 between the compressor and the Is there 208 230 VAC between CN721 intelligent power module and on the inverter P C board 3 Replace the inverter Turn ON the power supply and minutes after the power supply is turned Yes P C board press the TEST button once COOL ON mode No Replace the 4 way valve 20 7M D Check of outdoor fan motor SUZ KA09 12 15NA and measure the resistance of the outdoor fan motor E CN932 from the inverter P C board Y Is the resistance of outdoor fan motor normal Refer to 10 4 Yes Replace the inverter P C board SUZ KA18NA Check the connection between the connector CN931 and CN932 Y Is the re
23. e After setting the modes 07 through 14 the modes 23 through 28 cannot be set continuously or vice versa In this case after completing the settings for the modes 07 through 14 or 23 through 28 go to the step 10 to finish setting and restart setting from the step 1 At this point wait for 30 seconds or more before restarting setting Otherwise the temperature may indicate 9 8 Exit the Function Selection screen Hold down 2 buttons simultaneously for 2 seconds or more the FILTER and TEST buttons for the modes 01 through 14 and the ES and TEST buttons for the modes 15 through 28 After a few seconds the Function Selection screen returns to the OFF screen 31 e 12 DISASSEMBLY INSTRUCTIONS lt Terminal with locking mechanism Detaching points gt The terminal which has the locking mechanism can be detached as shown below There are two types refer to 1 and 2 of the terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out Check the shape of the terminal before detaching 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Slide the sleeve Hold the sleeve and Pull the terminal while pull out the terminal pushing the locking slowly lever Connector SUZ KAO9NA SUZ KA12NA SUZ KA15NA NOTE Turn OFF power supply before disassembling OPERATIN
24. ed valve 14 time flash 2 5 seconds OFF Closed valve is detected by compressor current Check stop valve NOTE Blinking patterns of this mode differ from the ones of Troubleshooting check table 10 3 15 10 3 TROUBLESHOOTING CHECK TABLE Symptom LED indication Abnormal point Condition Condition Remedy Outdoor unit does not oper ate 1 time flash every 2 5 seconds Outdoor power sys tem Overcurrent protection stop is continuously performed 3 times within 1 minute after the compressor gets started or failure of re start of compressor has repeated 24 times Reconnect connector of compressor Refer to 10 5 How to check inverter compressor Check stop valve Outdoor thermistors Discharge temperature thermistor fin temperature thermistor de frost thermistor outdoor heat exchanger temperature thermistor P C board temperature thermistor or ambient temperature therm istor shorts or opens during compressor running Refer to 10 5 Check of outdoor thermistors Outdoor control sys tem Nonvolatile memory data cannot be read properly Replace inverter P C board 6 time flash 2 5 seconds OFF Serial signal The communication fails between the indoor and outdoor unit for 3 minutes Refer to 10 5 How to check miswir ing and serial signal error 11 time flash 2 5 seconds OFF Stop valve Closed valve Closed valve
25. elded parts of 4 way valve 36 OPERATING PROCEDURE PHOTOS 4 Removing the discharge temperature thermistor defrost thermistor outdoor heat exchanger tempera ture thermistor and ambient temperature thermistor 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following connectors Inverter P C board CN641 Defrost thermistor and discharge temperature ther mistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor 3 Pull out the discharge temperature thermistor from its hold er Photo 8 4 Pull out the defrost thermistor from its holder Photo 6 5 Pull out the outdoor heat exchanger temperature thermistor from its holder Photo 6 6 Pull out the ambient temperature thermistor from its holder Photo 6 Removing outdoor fan motor 1 Remove the top panel cabinet and service panel Refer to 1 2 Disconnect the following connectors Inverter P C board CN931 and CN932 Fan motor 3 Remove the propeller 4 Remove the screws fixing the fan motor 5 Remove the fan motor Removing the compressor and 4 way valve 1 Remove the top panel cabinet and service panel Refer to 1 2 Remove the back panel Refer to 1 3 Remove the inverter assembly Refer to 2 4 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSI
26. er P C board exceeds 158 167 F 70 75 Check around outdoor unit Check outdoor unit air passage Refer to 10 5 D Check of outdoor fan motor Outdoor fan motor Outdoor fan has stopped 3 times in a row within 30 seconds after outdoor fan start up Refer to 10 5 D Check of outdoor fan motor Refer to 10 5 0 of inverter P C board Nonvolatile memory data 5 time flash 2 5 seconds OFF Nonvolatile memory data cannot be read properly Replace the inverter P C board Discharge temperature Temperature of discharge temperature thermistor has been 122 50 or less for 20 minutes Refer to 10 5 Check of LEV Check refrigerant circuit and refrigerant amount DC voltage 8 time flash 2 5 seconds OFF DC voltage of inverter cannot be detected normally Each phase current of compressor 9 time flash 2 5 seconds OFF Each phase current of compressor cannot be detected normally Refer to 10 5 How to check inverter compressor Overcurrent Compressor open phase 10 time flash 2 5 seconds OFF Large current flows into intelligent power module IPM The open phase operation of compressor is detected The interphase short out occurs in the output of the intelligent power module IPM The compressor winding shorts out Reconnect compressor connector Refer to 10 5 How to check inverter compressor Stop valve Clos
27. g compressor running Refer to 10 5 G Check of outdoor thermistors Defective outdoor thermistors can be identified by checking the blinking pattern of LED Overcurrent 11 time flash 2 5 seconds OFF Large current flows into intelligent power module Reconnect compressor connector Refer to 10 5 How to check inverter compressor Check stop valve Compressor synchronous abnormality Compressor start up failure protection 12 time flash 2 5 seconds OFF Waveform of compressor current is distorted Reconnect compressor connector Refer to 10 5 How to check inverter compressor Discharge temperature Temperature of discharge temperature thermistor exceeds 241 F 116 C compressor stops Compressor can restart if discharge temperature thermistor reads 212 F 100 C or less 3 minutes later eCheck refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV High pressure Temperature of indoor coil thermistor exceeds 158 F 70 C in HEAT mode Temperature of outdoor heat exchanger temperature thermistor exceeds 158 F 70 C in COOL mode Check refrigerant circuit and refrigerant amount Check stop valve Fin temperature P C board temperature 7 time flash 2 5 seconds OFF Temperature of fin temperature thermistor on the inverter P C board exceeds 167 176 F 75 80 C or temperature of P C board temperature thermistor on the invert
28. he distance between the TV sets or i sets or radios and the outdoor unit es within 9 91 ft No Are the antennas damaged Is the coaxial cable damaged Replace or repair the antenna Is there any poor contact in the anten yes Replace or repair the coaxial cable na wiring j Is the indoor outdoor connecting wire Extend the distance between the indoor outdoor of the air conditioner and the wiring of connecting wire of the air conditioner and the wir the antennas close Yes ing of the antennas Even if all of the above conditions are fulfilled the electromagnetic noise may enter depending on the electric field strength or the installation condition combination of specific conditions such as antennas or wiring Check the followings before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indoor outdoor unit of the air conditioner indoor outdoor wiring grounding wire antennas wiring from antennas receiver Electric field intensity of the broadcast station affected by the electromagnetic noise Presence or absence of amplifier such as booster Operation condition of air conditioner when the electromagnetic noise enters in 1 Turn OFF the power supply once and
29. ke it correct Operate the outdoor unit by starting TEST RUN Check the LED indication on the in Check the remedy following LED verter P C board No indication Does the LED flash 10 times Refer to 10 3 Yes 10 time flash Replace the inverter P C board Bi 24 How to check miswiring and serial signal error Tum OFF the power supply o Y Is there rated voltage in the power supply Check the power supply No Y Yes Turn ON the power supply y d Is there rated voltage between outdoor terminal block S1 and S2 No Check the wiring yres Press TEST button twice Y Does POWER lamp on remote controller light up CE of the power to the indoor unit No Yes SEO Y Is there any miswiring Is the self check of the remote controller md Se SEI ith indicated 6 minutes later No ee Yes ore Chinen indoor outdoor connect Yes ing wire No lt y A X1 Miswiring may damage indoor electronic control P C y board during the operation Turn OFF the power supply Check once more if the indoor outdoor connecting wire is not miswiring Short circuit outdoor terminal block S2 Be sure to confirm the wiring is correct before the opera tion starts Be sure to check this within 3 minutes after turning ON After 3 minutes
30. l high discharging temperature insufficient refrigerant U1 Ud Abnormal high pressure Overheating protection operation U5 Abnormal temperature of heat sink For details check the LED display U8 Outdoor unit fan protection stop of the outdoor controller board U6 Compressor overcurrent interruption Abnormal of power module U7 Abnormality of super heat due to low discharge temperature U9 UH Abnormality such as overvoltage or voltage shortage and abnormal g synchronous signal to main circuit Current sensor error Others Other errors On wired remote controller Check code displayed in the LCD 14 10 2 3 Outdoor unit failure mode table Abnormal point Failure mode protection LED indication Outdoor P C board Condition Indoor outdoor unit failure mode recall function Outdoor unit failure mode recall function None Normal Outdoor power system Overcurrent protection stop is continuously performed 3 times within 1 minute after the compressor gets started Reconnect connectors Refer to 10 5 How to check inverter compressor Check stop valve Discharge temperature thermistor Defrost thermistor 1 time flash every 2 5 seconds Fin temperature thermistor 3 time flash 2 5 seconds OFF P C board temperature thermistor 4 time flash 2 5 seconds OFF Ambient temperature thermistor 2 time flash 2 5 seconds OFF Thermistor shorts or opens durin
31. li Hinin iiih TTT Screws of the cabinet Photo 2 Screw of the top panel Screws ofthe cabinet Screw of the the back panel OPERATING PROCEDURE PHOTOS 2 Removing the inverter assembly inverter P C board Photo 3 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following con nectors Inverter P C board CN721 R V coil CN931 CN932 Fan motor CN641 Defrost thermistor and discharge temperature ther mistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor CN724 LEV 3 Remove the compressor connector CN61 4 Remove the screws fixing the relay panel Photo 3 5 Remove the inverter assembly Photo 4 6 Remove the screw of the ground wire and screw of the T B support Photo 4 7 Remove the screw of the PB fixture 8 Remove the relay panel from the PB support 9 Remove the inverter P C board from the inverter assembly Screws of the relay panel Photo 4 Inverter assembly SC vex REPOS Gaam 3 Removing R V coil Hook of the 1 1 Remove the cabinet and panels Refer to 1 PB support PB support 2 Disconnect the following connectors 122 T B support Inverter P C board STI 721 R V coil 3 Remove the R V coil Photo 5 Screw of the Hook of the Screw of the ground wire PB support PB fixture R V coil W
32. more 8 inch or more if there are obstacles to both sides 11 25 32 Drain 3 holes 1 5 16 1 9 16 o1 4 D in or 4 3 8 x 13 16 Air out TUO X slot 19 11 16 Ore T Open as a rule 33 1 16 3 3 16 gt 20 inch or more if the back 4 25 32 both sides and top are open 33 7 16 16 15 16 Liquid 1 4 flared Gas 1 2 flared 8 11 32 WIRING DIAGRAM 5 SUZ KA12NA SUZ KAO9NA Buum 104 SLU d 1231084 3B IV3H YOLSINNSHL GWAL 1 9914 an qn AjUO sJojonpuoo 1 gen z 102 SAA ONISUSATY YSZ YOLSINNSHLANLNIS 914 HINN 191 BUS JO AY 12 99X EX 15 1 1 5 2918 SINGON INSOITISINI Buum W3WHOJSNVML 0081 YOLSINYSHL 180
33. ncy lowers Frequency drop by defrosting in COOL mode Indoor coil thermistor reads 46 F 8 C or less in COOL mode compressor frequency lowers The unit is normal but check the follow ing Check if indoor filters are clogged Check if refrigerant is short Check if indoor outdoor unit air circula tion is short cycled 4 time flash 2 5 seconds OFF Frequency drop by discharge tempera ture protection Temperature of discharge temperature thermistor exceeds 232 F 111 C compressor frequency lowers Check refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV Refer to 10 5 Check of outdoor thermistors Outdoor unit oper ates NOTE 1 The location o 7 time flash 2 5 seconds OFF Low discharge tem perature protection Temperature of discharge temperature thermistor has been 122 F 50 or less for 20 minutes Refer to 10 5 Check of LEV Check refrigerant circuit and refrigerant amount 8 time flash 2 5 seconds OFF PAM protection PAM Pulse Amplitude Modulation The overcurrent flows into IGBT Insulated Gate Bipolar transis tor TR821 or the bus bar voltage reaches 320 V or more PAM stops and restarts This is not malfunction PAM protection will be activated in the following cases 1 Instantaneous power voltage drop Short time power failure 2 When the power supply voltage is high 9 time flash 2 5 seconds OFF
34. o SEZ KD09NA TH SEZ KD12NA TH SEZ KD15NA TH SEZ KD18NA TH HWE08020 Heat pump KZ lt E 5 gt 2 PART NAMES AND FUNCTIONS SUZ KA09NA SUZ KA12NA SUZ KA15NA Air inlet back and side OUTDOOR UNIT 7 Air outlet Drain outlet SUZ KA18NA OUTDOOR UNIT Air inlet back and side Piping Drain hose 7 U Air outlet Drain outlet DIT T Hh 1 1775 A 3 SPECIFICATION Outdoor unit model SUZ KA09NA SUZ KA12NA SUZ KA15NA SUZ KA15NA Power supply V phase Hz 208 230 1 60 Max fuse size time delay A 15 Min circuit ampacity A 12 12 12 14 Fan motor F L A 0 50 0 93 KNBO73FQDHC KNB092FQAHC SNB130FQBH R L A 6 6 6 6 7 4 10 0 L R A 8 2 8 2 9 3 12 5 Refrigeration oil oz Model 10 8 NEO22 15 2 NEO22 Refrigerant control Linear expansion valve Cooling dB A 49 49 54 Heating dB A 51 51 56 Defrost method Reverse cycle 31 1 2 33 1 16 Dimensions D in 11 1 4 13 H in 21 5 8 33 7 16 Weight TT 80 119 External finish Munsell 3Y 7 8 1 1 Control voltage by built in transformer 12 24 Refrigerant piping Not supplied Refrigerant pipe size Liquid in 1 4 0 0315 Min wall thickness Gas in 3 8 0 0315 1 2 0 0315 Indoor Flared Outdoo
35. o shows F and the address flashes this indicates that the selected unit No does not exist In this case set the correct address and unit No at the steps through ott controller Indoor unit Main Fan mode Select the mode number Mode number Press the Ug TEMP buttons 1 A to select the desired mode ee Li number he Only vaild mode numbers can be selected Mode number 02 Indoor temperature detection Select the setting No in the selected mode Press the TEMP buttons A to select the desired setting No Press the MENU button to flash the applying setting No Check the current setting No here a Dees Setting number display Setting number 1 Indoor unit s internal sensor sao number 3 Remote controller s internal sensor Confirm the settings made at the steps GO through The mode No and setting No stop flashing to confirm the settings Press the MODE button to flash the mode No and setting No and to start registration MEN 0000 em 9000 n3 mm n3 2 Lc 3 tes H the mode No or setting No shows and the temperature shows 44 this seems to be a transmission error Check for noise source or interference around the transmission path To make additional settings in the FUNCTION SELECTION screen repeat the steps through Not
36. o Replace the compressor Yes x1 H Heat the compressor with Compressor start failure Activate pre heat control a drier for about 20 minutes Refer to 9 2 PRE HEAT CONTROL SETTING Do not recover refrigerant gas while heating Heating part Check of outdoor thermistors Disconnect the connector of thermistor in the outdoor P C board see below table and measure the resistance of thermistor Y Is the resistance of thermistor normal Replace the thermistor except RT64 When RT64 is Refer to 10 6 1 No abnormal replace the inverter P C board Yes Y Reconnect the connector of thermistor Turn ON the power supply and press the TEST button twice Y Does the unit operate for 10 minutes or more without showing thermistor abnormality No Replace the inverter P C board Yes Y OK Cause is poor contact Thermistor Connector Pin No Defrost Between CN641 Din and 2 Discharge temperature Between CN641 pin3 and pin4 Fin temperature Between CN642 pin1 and pin2 Inverter P C board Ambient temperature Between CN643 pin1 and pin2 Outdoor heat exchanger temperature Between CN644 pin1 and pin3 amp Check of R V coil First of all measure the resistance of R V coil to check if the coil is defective Refer to 10 4 In case CN721 is disconne
37. ose not intake outdoor air through LOSSNAY Supported indoor unit intakes outdoor air through LOSSNAY Power supply 230V voltage 208V Frost prevention 2 36 F Normal temperature 3C 37 F 1 Can be set only when a wired remote controller is used When using 2 remote controllers 2 remote controller operation the remote controller with built in sensor must be set as a main remote controller RQ gt N S C9 PO G9 NB DO gt 2 Functions are available when setting the unit number to 01 SEZ KD NA i Mode Setting Initial setting 100h 1 Filter sign 2500h 07 2 No filter sign indicator 5 15 35 50Pa Refer to the table below 0 02 0 06 0 14 0 20in WG Refer to the table below Set temp 4 5 F ON Set temp 1 8 F ON Set temperature in heating Available mode 3 Not available 2 Fan speed during the Extra low heating thermo OFF Stop Set fan speed Fan speed during the Set fan speed cooling thermo OFF Stop Detection of abnormality Available 28 of the pipe temperature P8 Not available 2 2 For the detail of Heater control refer to the service manual of SEZ KD NA 3 4 degC 7 2 degF up External static pressure Heater control 2 ajni eloni eln elni External static Setting No 9 Initial setting pressure Mode No 08 Mode No 10 Factory setting 5Pa 0 02in WG 2 15Pa 0 06in W
38. oto 4 7 Remove the relay panel from the inverter assembly 8 Remove the inverter P C board from the relay panel Screws of the relay panel Photo 4 Inverter assembly Inverter Screw of the Heatsink P C board T B support 3 Removing R V coil M 1 B support 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connectors Inverter P C board CN721 coil 3 Remove the R V coil Photo 5 Screw of the Relay panel ground wire 4 Removing the discharge temperature thermistor Photo 5 R V coil defrost thermistor outdoor heat exchanger tempera ture thermistor and ambient temperature thermistor 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following connectors lt Inverter P C board gt CN641 Defrost thermistor and discharge temperature ther mistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor 3 Pull out the discharge temperature thermistor from its hold er Photo 5 4 Pull out the defrost thermistor from its holder Photo 6 5 Pull out the outdoor heat exchanger temperature thermistor from its holder Photo 6 6 Pull out the ambient temperature thermistor from its holder Discharge temperature thermistor 33 OPERATING PROCEDURE PHOTOS 5 Removing outdoor fan motor Photo 6 1 Remove the cabinet and panels Refer to 1 2 Disconnect
39. port D Receiver Flared connection Refrigerant pipe 21 4 with heat insulator Stop valve with strainar Stop valve with service port Capillary tube O D 0 142 x I D 0 094 03 6 02 4 50 Muffler Discharge temperature thermistor ORT62 Compressor LEV x 1 31 32 thermistor RT61 Strainer 100 Unit inch mm Outdoor heat exchanger temperature thermistor RT65 Ambient Outdoor heat exchanger temperature thermistor RT68 R V coil heating ON cooling OFF gt Refrigerant flow in cooling gt Refrigerant flow in heating MAX REFRIGERANT PIPING LENGTH and MAX HEIGHT DIFFERENCE Refrigerant piping ft Piping size O D in Max Height difference B Gas Liquid 40 3 8 KA09 12 1 2 KA15 Model Max Length A SUZ KA09 12 15NA 65 SUZ KA18NA Indoor unit Max Height difference B 50 Max Length A 1 4 1 2 d Outdoor unit ADDITIONAL REFRIGERANT CHARGE 410 oz Refrigerant piping exceeding 25 ft requires additional refrigerant charge according to the calculation Outdoor unit Refrigerant piping length one way ft precharged 30 40 60 1 Ib 16 oz 4 86 2 Ib 9 oz Calculation X oz 1 62 5 oz ft x Refrigerant piping length ft 25 Outdoor unit Refrigerant piping length one way ft precha
40. r Flared Between the indoor amp Height difference outdoor units Piping length Refrigerant charge R410A NOTE Test conditions are based on AHRI 210 240 31 Rating conditions Cooling Indoor 80 FDB 67 F WB Outdoor 95 FDB 75 F WB Heating Indoor 70 FDB 60 FWB Outdoor 47 FDB 43 FWB Compressor Sound level zi Connection method OPERATING RANGE 1 POWER SUPPLY Rated voltage Guaranteed voltage V 208 230 V Min 187 208 230 Max 253 Outdoor unit 1 phase 60 Hz 4 OUTLINES AND DIMENSIONS SUZ KA09NA SUZ KA12NA SUZ KA15NA Unit inch REQUIRED SPACE Basically open 4 inch or more without any obstruction in front x E 1593 4 Drain hole 1 5 8 and on both sides of the unit eo Air in amp gt dn 2 3 8 x13 16 Oval hole 7 8 29 32 11 1 4 17 32 T Open two sides of left right or rear side 21 5 8 Liquid pipe 1 4 flared Gas pipe 3 8 flared KA09 12 Y Ze 1 2 flared KA15 3 i 112982 6 23 32 e E 5 15 16 19 11 16 k 31 1 2 2 23 32 SUZ KA18NA Open as a rule 20 inch or more if the front and both REQUIRED SPACE sides are open 20 9 32 4 inch or
41. rd Yes If light up OK If flash refer to 10 3 260 325 VDC OF Inverter P C board Solder side 22 K Check of LEV Expansion valve Sett check Refer to 10 2 1 start Y Expansion valve operates in full opening direction Y Do you hear the expansion valve click x1 Regardless of normal or abnormal condition a short beep is emitted once the signal is received Click S Do you feel the expansion valve vibrate Yes on touching it No LEV coil properly fixed to NS Properly fix the LEV coil to the expansion valve the expansion valve yes Measure each voltage between connector pins of CN724 on the inverter P C board ais the uaa 2 GE GER Replace the inverter P C qol have the characteristics A 3 Pret Pint No board 3 4 Pin Pin Is there about 3 5 VAC between each NOTE Measure the voltage with an analog tester Replace the LEV coil Yes Replace the expansion valve NOTE After check of LEV turn OFF the power supply and turn ON it again 23 D Check of inverter P C board Check the outdoor fan motor Refer to 10 5 0 Y Is the fuse F901 blown on the in verter P C board Yes No Y Check the connection of the connectors CN931 CN932 of the outdoor fan motor If the connection is poor ma
42. re displays flash 2 8 for 2 seconds and stop flashing this seems to be an error Check for noise source or interference around the ransmission path Note If the operation is made incorrectly before completion finish operation by going to the step and restart from the step Set the indoor unit No Press the CLOCK buttons Y and _A_ to indicate the indoor unit Press the ON OFF button to flash in the unit No display No in turn such as 00 02 03 04 AL Select the unit No to which the function selection applies Unit bi Bn nd nit number DB 63 98 display section a an EI To set the modes 01 through 06 or 15 through 22 select 00 To set the modes 07 through 14 or 23 through 28 select 01 or 02 amp Confirm the address and unit No When the address and unit number are confirmed by pressing the Press the MODE button to eomm the address and unit No button the corresponding indoor unit will start fan operation This After a while the mode No display will flash helps you find the location ofthe indoor unit for which you wantto perform function Mode number FUNCTION nnh SS SELECTION UU uu display section vi Outdoor m rem unit If the temperature display flashes 88 this indicates that the selected address does not exist in the system Or if the unit N
43. re thermistor Cooling High pressure protec tion 12 9 SERVICE FUNCTIONS SUZ KAO9NA SUZ KA12NA SUZ KA15NA SUZ KA18NA 9 1 CHANGE IN DEFROST SETTING Changing defrost finish temperature lt JS gt To change the defrost finish temperature cut solder the JS wire of the outdoor inverter P C board Refer to 10 6 1 Jumper Defrost finish temperature 502 09 12 15 __502 18 Soldered 41 5 48 9 Initial setting None o o o o Cut 50 10 64 18 9 2 PRE HEAT CONTROL SETTING PRE HEAT CONTROL When moisture gets into the refrigerant cycle it may interfere the start up of the compressor at low outside temperature The pre heat control prevents this interference The pre heat control turns ON when outside temperature is 68 F 20 or below When pre heat control is turned ON compressor is energized About 50 W JK To activate the pre heat control cut the JK wire of the inverter P C board Refer to 10 6 1 NOTE When the inverter P C board is replaced check the Jumper wires and cut solder them if necessary 10 TROUBLESHOOTING SUZ KAO9NA SUZ KA12NA SUZ KA15NA SUZ KA18NA 10 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for miswiring 2 Take care of the following during servicing 1 Before
44. rged 40 50 60 70 80 3 Ib 16 oz 3 24 5 40 7 56 9 72 11 88 Calculation X oz 1 08 5 oz ft x Refrigerant piping length ft 25 NOTE Refrigerant piping exceeding 25 ft requires additional refrigerant charge according to the calculation 10 7 DATA STANDARD OPERATION DATA Representative matching SEZ KDO9NA SEZ KD12NA SEZ KD15NA SEZ KD18NA Item Cooling Heating Cooling Heating Cooling Heating Cooling Heating Capacity 8100 10900 11500 13600 14100 18000 17200 21600 SHF 0 80 0 76 0 80 0 79 Input 0 670 1 020 0 920 1 140 1 170 1 500 1 380 1 700 Indoor unit SEZ KDO9NA SEZ KD12NA SEZ KD15NA SEZ KD18NA Power supply V Phase Hz 230 1 60 Input 0 06 0 04 0 07 0 05 0 09 0 07 0 09 0 07 Current 0 51 0 39 0 57 0 46 0 74 0 63 0 74 0 63 Outdoor unit SUZ KA09NA SUZ KA12NA SUZ KA15NA SUZ KA18NA Power supply V phase Hz 230 1 60 Input 0 61 0 98 0 85 1 09 1 08 1 43 1 29 1 63 Current 2 80 4 33 3 64 4 65 4 45 5 96 5 38 6 91 Condensing pressure 398 448 387 386 399 389 373 397 Suction pressure 135 97 135 104 133 96 142 100 Discharge temperature 148 170 162 165 159 182 150 172 Condensing temperature 116 125 114 114 116 115 112 116 Suction temperature 49 33 55 35 46 41 52 33 Electrical circuit Refrigerant circuit Ref pipe length 25 Refrigerant charge R410A
45. servicing the air conditioner be sure to turn OFF the main unit first with the remote controller and turn off the breaker 2 Be sure to turn OFF the power supply before removing the front panel the cabinet the top panel and the electronic control P C board 3 When removing the electrical parts be careful of the residual voltage of smoothing capacitor 4 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 5 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires X 8 Lead wiring Housing point 3 Troubleshooting procedure 1 First check if the OPERATION INDICATOR lamp is blinking ON and OFF to indicate an abnormality 2 Before servicing check that the connector and terminal are connected properly 3 When the electronic control P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 Refer to 10 2 and 10 3 13 pT 10 2 Failure mode recall function As this air conditioner has a function to memorize all the failures that had happened the latest failure detail can be recalled by following the procedures below 10 2 1 Wired remote controller CHECK button Refrigerant address TEMP button IC Indoor unit OC Outdoor unit Check code Ska IC
46. sistance between each ter No Replace the outdoor fan motor minal of outdoor fan motor normal Refer to 10 4 No Yes Y Disconnect CN932 from the inverter P C board and turn on the power supply Rotate the outdoor fan motor manually and measure the voltage of CN931 Between 1 and 5 Between 2 and 5 Between 3 and 5 lt Fixed to either 5 VDC No Y Does the voltage between each terminal become 5 and 0 VDC repeatedly Yes Y Y Replace the outdoor fan motor No Does the outdoor fan motor rotate smoothly wes Replace the inverter P C board 21 J Check of power supply Disconnect the connector CN61 between compressor and intelligent power module Turn ON power supply and press the TEST button twice Does the POWER lamp on remote controller light up No yes Is there bus bar voltage 260 325 VDC between DB61 and DB61 x on the inverter P C board Yes Refer to 10 6 1 Check the electric parts in main circuit pt Rectify indoor outdoor connecting wire Yes Is there voltage 208 230 VAC between the indoor terminal block S1 and S2 Replace the indoor N electronic control P C Does LED on the inverter P C board light up or flash Refer to 10 6 1 Replace the inverter No boa
47. ster lt lt Operation method Test run operation 1 Press the TEST RUN button twice 2 Press the MODE button and switch to the COOL or HEAT mode 3 Compressor starts at rated frequency in COOL mode or 58 Hz in HEAT mode 4 Indoor fan operates at High speed 5 To cancel test run operation press the ON OFF button on remote controller Measurement point at 3 points BLK U WHT V BLK t RED d Measure AC voltage between the lead wires at 3 points WHT V RED W NOTE 1 Output voltage varies according to power supply voltage 2 Measure the voltage by analog type tester 3 During this check LED of the inverter P C board flashes 9 times Refer to 10 6 1 O Check of compressor winding Is the compressor normal Yes No Replace the compressor to 10 5 Check of compressor Refer to 10 5 Check of compressor operation time No Refer to 10 5 Check of compressor start failure Does the compressor operate continuously Yes Check of compressor winding e Disconnect the connector CN61 between the compressor and intelligent power module and measure the resistance be tween the compressor terminals Measurement point at 3 points BLK WHT BLK RED X Measure the resistance between the lead wires at 3 points WHT RED lt lt Judgement gt gt Refer to 10 4 o O
48. tdoor fan motor 5 time flash 2 5 seconds OFF High pressure pro tection Temperature of indoor coil thermistor exceeds 158 F 70 C in HEAT mode Temperature of outdoor heat exchanger temperature thermistor exceeds 158 F 70 C in COOL mode Check refrigerant circuit and refrigerant amount Check stop valve 8 time flash 2 5 seconds OFF Compressor syn chronous abnormal ity The waveform of compressor current is distorted Reconnect connector of compressor Refer to 10 5 How to check inverter compressor 10 time flash 2 5 seconds OFF Outdoor fan motor Outdoor fan has stopped 3 times in a row within 30 seconds after outdoor fan start up Refer to 10 5 Check of outdoor fan motor Refer to 10 5 Check of inverter P C board 12 time flash 2 5 seconds OFF Each phase current of compressor Each phase current of compressor cannot be detected normally Refer to 10 5 9 How to check inverter compressor 13 time flash 2 5 seconds OFF DC voltage DC voltage of inverter cannot be detected normally Refer to 10 5 9 How to check inverter compressor 1 time flash 2 5 seconds OFF Frequency drop by current protection Current from power outlet is nearing Max fuse size 3 time flash 2 5 seconds OFF Frequency drop by high pressure protec tion Temperature of indoor coil thermistor exceeds 131 F 55 C in HEAT mode compressor freque
49. the following connectors Inverter P C board CN931 CN932 Fan motor 3 Remove the propeller nut Photo 7 4 Remove the propeller Photo 7 5 Remove the screws fixing the fan motor Photo 7 6 Remove the fan motor Outdoor heat exchanger tempera ture thermistor Removing the compressor and 4 way valve 1 Remove the cabinet and panels Refer to 1 2 Remove the inverter assembly Refer to 2 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG Photo 7 4 Detach the welded part of the suction and the discharge pipe connected with compressor 5 Remove the nuts of compressor legs 6 Remove the compressor 7 Detach the welded part of pipes connected with 4 way valve Photo 8 Propeller Photo 8 Welded parts of 4 way valve 34 11 2 SUZ KA18NA NOTE Turn OFF power supply before disassembling OPERATING PROCEDURE PHOTOS 1 Removing the cabinet Photo 1 1 Remove the screws of the service panel Screw of the top panel Screws of the cabinet 2 Remove the screws of the top panel x 3 Remove the screw of the valve cover 4 Remove the service panel 5 Remove the top panel 6 Remove the valve cover 7 Disconnect the power supply and indoor outdoor connect ing wire 8 Remove the screws of the cabinet 9 Remove the cabinet 10 Remove the screws of the back panel 11 Remove the back panel j i
50. then turn ON the power supply In this situation check for the electromagnetic noise 2 Within 3 minutes after turning ON the power supply press OPERATE STOP ON OFF button on the remote controller for power ON and check for the electromagnetic noise 3 After a short time 3 minutes later after turning ON the outdoor unit starts running During operation check for the elec tromagnetic noise 4 Press OPERATE STOP ON OFF button on the remote controller for power OFF when the outdoor unit stops but the indoor outdoor communication still runs on In this situation check for the electromagnetic noise 26 lt 10 6 TEST POINT DIAGRAM AND VOLTAGE 1 Inverter P C board SUZ KA09NA SUZ KA12NA SUZ KA15NA Bus bar voltage Smoothing Smoothing Smoothing DB61 capacitor capacitor capacitor Fuse F701 Back side of unit C63 C62 C61
51. ting Gonfmisi Confirmation of power voltage equipment age between indoor termi No Turn OFF the power supply and then No turn ON again Press TEST button twice terminal block Is there any error of the indoor out door connecting wire such as the damage of the wire intermediate connection poor contact to the Is there any error of the indoor out door connecting wire such as the damage of the wire intermediate connection poor contact to the terminal block No Replace the indoor controller P C board Is the self check Reinstall either of the remote con the unit or the troller indicated 6 gt f light away from minutes later No feach other 25 Yes Replace the indoor outdoor connecting wire pT Electromagnetic noise enters into TV sets or radios Is the unit grounded No Ground the unit Yes Is the distance between the antennas and the indoor unit within 9 91 ft or is the distance between the antennas and Yes the outdoor unit within 9 91 ft No Extend the distance between the antennas and the indoor unit and or the antennas and the outdoor unit radios and the indoor unit within 3 28 ft oris the distance between the TV Extend the distance between the TV sets and or radios and the indoor unit or the TV sets or radios and the outdoor unit Is t

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