Home

here

Contents

1.
2. POWER P W B R RADIAL M MAIN P W B MODEL RAC 25YH5 RAC 35YH5 S OTHER SMT ien CA
3. O CAPACITORS CAPACITORS TRANSISTORS a SYMBOL m DE SYMBOLI aas E 5 SYMBOL MODEL 5 3 470 50 cl RIP 6900 2200 50 M 2802412k C02 1050 D 1500 50 cl RUP 0106 DTC114YSA RIP co4 470p2K c R P cos 56050 D R P C913 0101250 C M C06 33025 D R P 10 25 D 33025 C915 1025 3302580 RIP C916 0 1 25 C C M 9201 2502412K C11 0150 cl RIP C917 10 25 D 9204 RN1402 cim 9205 2802412k C M 919 0 01 80 C C M C21 0 150 C R P C920 0 125 C 9501 25 2412 C28 470 10 D R P C921 M 9701 25C1214CTZ R P 624 470p2K C R P C922 M 3801 25612146771 R P C923 M 631 0125 c R P C32 150 C RIP C930 M RELAY C940 1 25 C M MODEL 5 3 SI M RLI 0544 RL2 FTR F3AA012E H P B 68 450 RL3 FIR F3AA
4. XH3P Top CN8 3 1 12V CN 10 XA 6P Top Temperature fuse of terminal board De ii 0 0 6 102 Built in terminal board ICP2 gt 35V Le R121 9111 To N Q fd PQS Owe o e Th EF s A TCP 4 1111 t c 4 A S B BLS ads E Riia a grs en opel 2 ex N 3 42 2 B ik PLA 0 a o qe 8 m Note e 55 10121 B lt 4 Heo m koa a 1 5 157 i ls Em LM n 2 1 Type of Capacitor R TS _ 2 lo _ T a po Film Capacitor D 16 KO si 2 j e m O lt Sf a CE Ceramic Capacitor X RED EUN 5 TX O o X i 5 5 D Electrolytic Capacitor Terminal Board 8116 9114 Power 14 RE 0v 12V 2 Symbol of the parts list is Switch Dre 4 e 9 9 9 4 as follow CN3 5 V 1 711 52515 CNA PH SP Top gt S 3 9 1 Symbol Shape BRN E O a 2 TN A Axial a R830 3 M R Radial crew e C821 amp 171 4 X H Manual 3 5 Stepping Motor C Chip 5 1
5. 6821 R821 IS 0824 ES I Micro 35V 10801 0v Computer TERMINAL gt BOARD um Ce 2 0 1 F TRANSMISSION OO OV OR UNET ope de OUTDOOR UNIT POWER P W MAIN P W B 5V CER Micro CROITE 0801 Computer i DHG 0204 2 I F TRANSMISSION 0801 oV C802 DHG en M S RECEPTION 1801 i 0807 A 0 35 9 Ruis 17 nw 1802 1 js 0206 A D 0 2 D C810R804C808 1808 0803 L804 G D OV VIAN TERMINAL Ov BOARD TIT TIT Fig 3 1 39 5V Outdoor microcomputer Pin 11 ov Pin 68 Ar 5V Indoor microcomputer Pin 5V OV a n ME OV 100ms 33ms Leader 1 frame Fig 3 2 Voltages Waveforms of Indoor Outdoor Microcomputers Outdoor to Indoor Communications Outdoor microcomputer Pin 11 0 OV Indoor microcomputer Pin 5V U CNAU Pin 5V U 4 95ms 33ms Transmit receive 1 frame switching time Fig 3 3 Voltages Waveforms of Indoor Outdoor Microcomputers Indoor to Outdoor Communications 40 an A ve U S S 100pui pue 0
6. enjoy uoeai jou seoq senunuoo dwe SI ueuM JO uay pue Buneayaud Buunp paddojs si uonesedo yun Josuas Jeayaid SY Buruq si dwel 241 si smous 5 lt wuoped oj ey sjonijsur pue eui 150 5 eu paddojs si ay se si OU HO pue ay ewodeg woo 1 94 soeuisoo exouis jo saed pue 5 se posneg si weajs pue jejeM ay weas Aq jueppns si WOO y se si ISIN UOISSIUIO ISIN woo Buipioooe amod onp seBueuo esiou sejes ynsuoo
7. 1 n pape 2 SELF DIAGNOSIS LAMPS 10302 N 10303 N SERVICE SWITCH Check the drive U yos With the unit set in the operating Yes circuit using fails wait 3 minutes state press the start stop for the unit to re button the PRD checker start and check the Does the unit operate for Check the position self diagnosis lamp approximately 2 seconds the sensor circuit status again LD303 coming on and then stop due to a failure of switching the lamp blinking 4 times Normal Check the refrigerating cycle Check outdoor electrical parts 68 CHECKING THE INDOOR OUTDOOR UNIT ELECTRICAL PARTS AND REFRIGERATING Is the indoor unit timer lamp blinking Yes No Run the unit using the following remote controller settings In the cooling season set the temperature to 16 C in the cooling mode No In the heating season set the temperature to 32 C in the heating mode Does the operation lamp light or blink iy Yes Is the compressor running
8. eui peejesee d NOILNVO3Hd ALAAVS ASN OL MOH sejes INOA YSE JUEM NOA USUM de Jepun J9 EM Jo Jeuee o Buisn Aq oz oi dn pue pue 4 pesn Buizuopoep pue eui ueuw samos peeds ay pue s Aedes eu JOU eseejeJ pue sepis sse1duioo Aq eui Burzuopoep pue eui O pue Buisueeoj y Hun 100pino eu peiddns si samod ey JexeeJq BU JO YIHMS y yo Buruan Aq panes si amod eu BUI peuinsuoo SI amod paresedo jou s pun y pue uo s ejs 19mod y J ponad e payesado eq jou si ey 16 wod eui 10 1exeeJq eui un si eouo 291 149994 JSOW ey
9. wool jenjoe pue sinyesodwia y yore Aq Gules 3 ainyesadwe pue eui ssoud 0 6 JO Aq se Bumes 19 10 asies ULI euim 1xeu JOLS LHVLS D eui e eu NOA ejouJ8J UI UI peJojs y SY IHOVLIH uoleiado dois ssejg syes uonejedo UONG dO1S 1HVLS O eui sseJd 40167 002 jeeu Bumes eBueuo jou SI Hun ay Aq peioejes y HI ejnjejeduue eui 0 226 x eu eunyesedwe au 0 eanyesedwer ey jsn pe Buijooo 10 oleudosdde 199j9s ureBe Jeuonipuoo sebueuo Ajjuanbasqns eanyesedwer y uonejedo Jeseid y s u1001 eui PIISNIPE sey ueuM uonesedo 19d01d ay 08198 pue eJjnyejedujej ey
10. jeubis e IHOVLIH pue spuooes 0 anba ey BY OJUI peuesui seueneq MAU Ayiqedeo UoIssiIusuel jeus sy Jam 10 OED Jejo41uoo BU ULI pun JOOpu aans Buxy pepi oud eunjxij BUI UO aq 3141 JOU 5 011009 ay seseo ui y si 100pu j si jo SUI ey jo y siy HATIOHLNO9 SLOWSY 1 40 SNOILONNI ANY S3IAVN Suonipuoo eui ui jueseuJd ejdoed jo uo Buipuedep peuoeai eg jou enjejeduje woo jeseJd 941 sezsa eui 9 y j sdois 1961 eui uey SUI J 0 91 e 10 2 9 5 eunjejeduuej 1
11. 1409198 14 ASN 40 99 8S NOILONNA punoj si uonesado ewos 10 Jaye SIY uonng 13534 pue ey pue 195 oi siu SSN uonnq Appinb anjen eur pue eanyesedwer ey 40 0 esf euin deejs ey 195 0 uoing 5191 esf 43375 10 peeds 10 eui Bunoejes smojje 5141 E 01 amp IH amp o1 OLAV c Jo eui siy ssaud nok euim peeds y 5141 10139195 13345 NVA 10199 J9P jejuozuou eui jo ejBue sJONUOD ONIMS OLNV dois 55914 11815 SIU dOLS LYVLS yo AIISUDIUI pue snes jueuno pejoejes eu SIU Aejdsig 149 e UBIS UOISSILUSUEN 941 N Ji HUN BU SIU JULIO oU 7 UBIS
12. fep pue yjuow jueuno 195 L AHL 135 01 10 JO eu 0 pue usng sy uow JO Z 10 ey esn JOU NOA seuejeq 72 JO 10 pue meu esn jou I W eseo ey ui N slew pjnous ey jo eu seuejeq Meu eu seueneq eui aye pue ay UI UMOYS SE 19 09 SUI YATIOULNOD 31033 JHL NI S3IH311V8 JHL OL MOH SUL 1 10199 j9p eui jo pue ey pilui eui epis JSt Inoge uauM 20910048 1009 UAUM eui 10 ind pexreui sl 104 Ind 0 1 BU JO pue eu paly eui epis pue peuonipuoo y ysn pe pue eui se eonie eui pue peuonipuoo jo jueunsn py doup pue ejuozuou eui uo uuo
13. Output Voltage Main load Measuring points Potential failure modes spec 12V 11 13V MAIN P W B CN3 CN4 R701 412 display 8006 OV display The unit won t operate C21 42 display J27 J30 MAIN P W B error 5V 4 5 6V MAIN P W B CN3 CN4 030 anode 5V display R006 OV display The unit won t operate J25 J27 J30 MAIN P W B error B 12V 11 16V Expansion valve R25 B 12V display R25 B OV display LD301 blinks 5 times Expansion valve error 15V 14 17V DC fan motor CN24 C06 side C06 side LD301 blinks 3 times MAIN P W B CN3 CN4 35V 33 5 38V Indoor unit electrical parts D20 cathode J5 J17 Indoor unit won t operate Terminal C D 35 display Terminal D red line Reversing valve CN2 Terminal C blown line Check each voltage If each voltage meets the voltage specification above the power circuit is normal If any error is found after checking remove all loads and recheck each voltage If no error is found in this step the power circuit is normal Check the removed loads If any error is found in this step the power circuit has any failure Replace the power P W B A short circuited load may cause an output error not only in the load but also in the others Be sure to check all outputs of the loads x Be sure to wait 15 minutes or more in order to discharge all the remaining voltage in the circuit to connect disconnect the wir
14. f usemjeq y 1 SOA A0 pue uaamiag si ay ul DNE 2 seyeredo JOJOLU Bulsn AS OFAS Z Ulum eu Jaye 8000 uy SI BUI ees HOUD ue 51 ON ewou 1e 0 SIA pue ueewjeq eui S 4amod ey eoejdo4 apis 4ewod uo jueseJd si 1ndino ou j 4ewod eui UO PBUDIIPS Y IS 0 pue ASL ueewjeq pue eui uo 6 pue y BIND ueeweq 1104 290 ASI S pue ZOLY JOJOLU eui pue esn vL eui Aue Jejjedoud eu 1 10119 YOO 4 JOjoeuuoo 199UU0N seulll zL 10601 77 e JOMOde apnjoul sesneo JAISSOd Jewod eu eoejdeu uedoud JOUS UI BUI 499u2 x Ajszedoud 19916 ezoo pue 1019894 ZL AVL LE AVL 9 AVL S
15. Bumes ey uey Jamo 51 uorum 49618 eoejd Saye uonoung BuiAjupiunueg uonesedo siu 0998 0 10199 9S NOILONNA 94 esn osje m si eunjejeduie 195 M 1099105 NOILONNA esn eseejd oj ueuM m 40157 JO LS LHVLS O eui avis 40M Jou seop 3346 NVI 941 MOT ye 195 SI 3385 NVA 941 A3IQIIWQH3Q O Sejeorpui ejdsip eui 124 os 1010008 NOILONNA 941 55914 JOU BuiAjipiunuep 2261 1epun SI 1 ueuM 091 SI Wool ey 10 eui esn NOI1VH34d0 9NIA3IGIATH3G 01 1504 Jensn uey 1 si pesn uifue Buidid au 41 SOINUILU OZ SI 40 euin au p go lt 0 pue uo spuooes jo y Buung euin uoee 01 6 10 Joopino jo yeay y UO 3 0 1504 ueuM INOY ue aouo eq BUIN 1xeu dOLS 1HVLS O sseud NO
16. eui 1 SO ewou 101SIW19U ey JO eui SI Jaye eq ue qoJd oul JOJO UUOD eui 101511941 Saul Z 10EAT 80 ey eq 941 JOMOd uieis S eos SIA Jemod ey uo AO GL pue AGL jndjno ASL ey SI pejoeuuoosip YNO PUE END Ae dsip JOMOd ewou jndino AG eui SI uonoes 1 rewJou AI eui S SO eAnoejep 10 Hun eui 19114 40 1eeu 10 BUI Y29049 X SI Ou JI ees 0 YOOUD X SOA JOISILIDU ewou UI sued eui S eu eoejdeu 4 SO SO peeds jeuuouqv
17. uonejedo y 2 suonisod 1991109 ueeq sJojoejjep ejuozuou 19 991 51 GISNP pexoojg Jeyg OY 1 M Jeay JOU seop lem 009 JOU seop Bumes S ue e peBueuoun uoneoipur Aejdsip 19 0 1u09 ay paads 19sa1d eui jo MOT E 01 5195 peeds y sawn Buung Auoud Saye awy ay si 44O NO SU passaud s 43315 Aue amod eui S ENO 1948319 BUI ayesedo jou ueuM 10 eui 51 typu esn eui 8146 eui jo YAWIL eur pue deeg si YEU uiuo eui e eu ssejun SI euin 195 eui ji JOU Pun eui seu BUI UDYM 10 SI e dsip 3318 2 HANIL 61981100 palosui jo eui 1 eu
18. esneo pue esdejoo 1 eui JOU J 129Jep 4 pue wuy ejgeis si owes yeu ainsue 21 DUI se uons snyeredde jo Buom au yooye Kew siy se snyesedde pjouesnou 998 Jeued y 009 BW JOU O SNOLLIVOIYA 72 3784580 1191445 Wood AU A i sjuewdinbe pun eui c S 13M1NOd jeje esneo pjnoo spueu y JdwWaye zou NOI d esn 19410 Aue O 10 JOU pue ey Jepun eys 1onpoud eu NOILNVO jnsoj e jou Aq aq ejnsseJd s ueo 5 sy O sjun 400pjno pue jo sIajino SUI JO Jejew eq jou Pinoys pue sued HO UIN do y j euuoosip wos S I pjnoo Siy osn se 1ojonpuoo Aue osn
19. Auoedeo ay pue eseeJoep eui SNP JO n SI Y eseo panes Jamod ey os Ag ey oi euns eq UO 1 PUI 1 eui Ho pue dois euosiad eorues Aq eq pue Bulueajo JONVNILNIVIN 12 8k UO SI PUN Y USuM BAJEA pazuojow JO SION asiou yes se uons eui esioN seDueuo enp spuedxa ay esioN asiou Buyeenbs SI punos JO edid ey ui esiou asiou spunos 221 10 BuISSIH rem si 241 uonejedo up sdojs pue syuIjg Jojeoipur rem asea Buuedaud si jun ay uonejedo y Buung yeis uoneiedo eJnjrej HUN ejeorpui JOU op Buiwojoj 941 m peeds y 5 amp pexoolq sjun JOOPINO pue JOOPU 10 Sje no JO SIOJUI DUI DIY
20. MAIN P W B N 5V O H thermistor 1 R304 E ii 62 5V R301 C304 DEF thermist CN9 V Ov Microcomputer 1 ov N R305 63 5V R302 Y Outdoor temperature ov thermistor CN10 V 1 ov 2 R306 4 64 Outdoor temperature C302 R303 V V OV Fig 7 1 The Over heat thermistor circuit detects the temperature at the surface of the compressor head the Defrost thermistor circuit detects the defrosting operation temperature A thermistor is a negative resistor element which has the characteristics that the higher lower the temperature the lower higher the resistance When the compressor is heated the resistance of the Over heat thermistor becomes low and voltage to a pin 62 of microcomputer is increased Microcomputer compares the voltage at pin 60 with the internal set value if it is exceeded the set value microcomputer judges that the compressor is overheated and stops operation When frost forms on the outdoor heat exchanger the temperature at the exchanger drops abruptly Therefore the resistance of the Defrost thermistor becomes high and the voltage at pin 63 of microcomputer drops If this voltage becomes lower than the set value stored inside the microcomputer starts defrosting control During defrosting operation the microcomputer transfers the defrosting condition command to the indoor microcomputer via the circuit interface The m
21. yos e Ap Hos ou SI jeued ysem Buisn sayy aBuods YOS e USEM USEM pue jeued 1U0J TANVd LNOHA JO 9 NOA 11990 ned JUN ejejedo yuuys eu UNS eui esodxe jou op epeys ey p pue Ajejejduioo yo exeus BUIUSEM UAUM 4uuus DU 0 ULY 19 EM JOY USEM jou W pue se suoniod je jeued eui usnd ay 5 y Wau 1018 pue Je3lj eur 195 epeus ey esu pue yum 1911 BUI 45 YONW si 18 JI Jeueejo OY pue njeeo uo ey D JHNAJIOYdA e1npeooJd ay eui ULAJ ens eg 1000 esiou
22. O pue jo siers ew NO 941 3AH3S3H eui sseid pue jonuoo HIJWIL pun JOOPU ey premo ejoujeJ jo MOPUIM eui 1 euin uo uinj eui 19 2 euin jo Dunes 941 ur doo go UUNI ejdurex3 O O 4 jun ey uo 1 dwel eui pue sanooo deeg y siufi pue jo 5 215 440 eur uonna JAHISIU eui 55219 pue 041009 SUI jun ay JO MOPUIM 1U104 euin jo uini eui 19 2 ejejduioo euim urdog si eu ajdwex3 jueuno ey jo Bunias ey 821M uonna ym lt Baas eui sseud ed jueuno eui N 4 jo Spuodas OL ui sesddesip 511615 UONEeoipui wn ey y 94 AWIL INIL gp 196 2 PUE Jeuln 44O 94110 euo AjUO Jes UBD ALON
23. SNOILONNA SNOIHYA 9 UonoejoJd 10 SOINUILU 1noqe 10 901 ONS OL A ey Buunp 1009108 NOILONNA 941 55910 prep Em eJnjrej ejeorpur JOU seop pue ey 199 04d 0 SI SIUL HOLOFTAS HANLL 138 HINIL O pue p109 19mod Bnjdun Jo uo pue jjo YDIIMS 19Mod y uini Ssejun 1NOJE 10 WE SAJ JOU Sdo s By 99UO O LEVIS y uo doup jou oq 19 0 1U09 9U 015 O e jo AHUIDIA eui UI TEE juBiuns 1 eui UI zou esf 10 aaas uoneAIese 130N va 1000 uoneAJesei 3AH3S3H N O eum NO 1999S uonnq H3WIL NO 9 eun 440 UIN 9U1199j9S gt HAWIL AJO y 195 0 esau esf 1011409 ONIMS OLNV 10129Jes 13345 NVA 01 pue 1000 01 A4IQIINnH3Q O 9 1v3H ot OLAV c au 4 SSII NOA euin
24. 10 sey HUN ay 10 v pajsnu sey Bununoui ees 42945 puezey xoous 21 JO anre pejoeuuoosip SI l ONINYVM u09 u q seu Yea au JI 0 v d33N GINOHS S3 1VS HNOA LOVINOD X1HV3AHO ATHVIA H3HLI3 AH3A3 SLNIOd ONIMOTIOJ JHL 3SV31d NOIL93dSNI uv 1093H 13 02 peAJesqo eq ssluedwog Ajddns 19Mog 820 y JO SUONIPUOI 941 eouenbesuoo jo si 141 21020 Kew 1ufijs si 1461 WOO y Juowdinbo ey uo uo yne y osje jo uononpoud jo ey jo INOA uuoju suonoedsur e oqe eui Jaye 15 sajes INOA 12e u02 ey soyesodend pue 19 94 OS 1 0 syoris UO os pue 5 ayows Ag eui esneoeq je
25. COMPRESSOR Y 9 52 Silencer Service valve 1 4 lt Single ended union 1 4 66 35 Strainer 6 35 OUTDOOR UNIT lt 7 D 3 8 a L 053 rvice valve INDOOR UNIT Single ended union 3 8 49 52 gt D a 9 52 gt 3 Electric Expansion valve 6 35 Strainer Service valve 1 47 HH Single ended union 1 4 96 35 GH 02 5 6 35 Strainer 29 DESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAS 25FH5 RAS 35FH5 1 Reset Circuit NORMAL HI RESET 10 o 7 RES Microcomputer 58 e R552 C524 1 C521 3 oi N O o lt Fig 1 1 Power OFF Pa Power ON P Voltage Voltage supply to pin 2 of 1C521 Reset release at 4 4V Reset enter at 4 2V Voltage
26. asn4 1 BU seu 5 ve eui ON BSN YE n Aue E pom Ex s AS pue S e qeo eui 1991100 S JOMOd 10 JI lt pejoeuuoo pue 2 eas 2949 sjrejep JO Jamod uo uonduosep eu ees lewiou Jewod SI 510106062 sued lt lt aan sued 1940 yey eq umojq sey esn OU JI 61981109 pue go 19mod ey 0 ens eg 10 suonoeuuoo oui ey peyeAnoe SI UONDA 01d s jddns Jamod MS SUL uonoeuuoo ey g pue y je Bulaq SI jeuuouqe 10 uonejedo ON SLYVd 19914125373 HOOALNO 76 ay 190 xoidde ON AeuuoN ewou pue
27. Aq eq JIM eur deals SI eum JJO UIM 3y urd je daajs 195 NOA j ejdurex3 nc euin eui Ae dsip eui jas ueeq sey d js eui UDUM HUN deeq e dwel HIWILIU 1 uo pe ejdsip uoe wozu 941 43315 sseid go uun uay pue sinoy eui deals yo deals dees lt SINOYE lt sinuz lt noy epo 19 JOWII JJO UO JO HO JO 5 ay alee 195 ueeg seu awy HO UO JO eui dee s ay 195 NOA pun JOOPU eui uo suuni pue e seo q3Ad3S3u 941 139NV2 O sseJd pue 9 0W91 BY JO Jeu IS eui 1 MOH pue JOOPUI eui jo eu Is 22215 319 y pue 43315 sseJq eu seDed ay
28. HUN Joopu ey uo JO suuni pue deeg e 5906 3534 O 941 9 ey 55 pue jo BUI 1104 MOH jo eouenbes lt Aejdsip uo Duueedde 94 zey eum 15919 y 1e 1644 511220 y je uo jjo pue uo jw BU uonng NO 84 JAHAISIU 1 8uisseid es pue 440 O vonng 1eu 440 eui OS YAWIL HANIL SUI os YALL NO 241 ssa1g euin JO UIN eui 195 440 O eui sseiq L ey uo UUNI JIM SUL uo syuiq NO vuonna lt HANIL NO 94 55 L euin 1ueseJd y BY 9S UBD NOA THONVO to Kejdsip uo 440 SUL H3WIL 4JO O eu ssejg L AAYASSY NO 440 0 solloneq yjuow 149419 HLNOW AVG ANIL IHOVLIH uognq
29. SHUI JO LOEA G SAUIJA 10601 SOSH HO ey 1e eunejeduiej eu SSU 9 10207 81 jeunoes 1 yey ejns 4oeuo uone4edo eui WIOHed ey AS si jo D uid ewou 19591 BU S Jewod eur eoejdeu SOA ewou Jamod eui SI SoA SO nej JOU SIUN si amod Jaye 151 50015 pue sjasal y 10641 jno 1u844n9 MES seul 10601 82 JUDGING BETWEEN GAS LEAKAGE AND CHECKING THE REFRIGERATING CYCLE COMPRESSOR DEFECTIVE 1 Troubleshooting procedure No operation No heating No cooling Lighting mode Connect phase leads to the pinks Blinks Blinks Blinks Blinks Blinks power module again and operate the diagnosis lamp air conditioner 2 times 3 times 4 times 5 times 6 times 8times Approx Approx 10 seconds seconds
30. wan Sa SOLDERING IRON 30 TO 75W 62 STRUCTURE OF AN INDOOR UNIT ELECTRIC PARTS RAS 25FH5 35FH5 ELEC COVER FIXTURE SCREW FIXTURE SCREW Removing electrical parts When installing the parts use 1 Remove the electrical parts cover caution not to pinch any code 2 Remove the connectors from the CN1 heat exchange thermistor CN4 stepping motor and CN10 fan motor between heparrend cabinet 3 Remove two lock screws 4 Remove the electrical parts in the direction of arrow CN2 PWB SUPPORTER PWB SUPPORTER d bo MW CN8 PWB SUPPORTER N PWB SUPPORTER INDICATING PWB HOLDER Removing control P W B Removing the indicating P W B 1 Remove the connectors from the CN2 and 1 Remove the connector from the CN2 on CN3 the control P W B 2 Remove the P W B from the P W B support 2 Remove the upper hook from the indicating P W B lock resin pull the P W
31. ue jou 10 Ajainoas 9NINHVM 19205 peuesui jou 19mod v 194205 By oiu N j an s s Bnjd amod y H ees 0149040 aq Jou ainjesadwa 1950919 y pasn s vuedde 19410 10 WOO eui ui Auew 10 y WOO ui 95910 Buisneo 10 esdejjoo 1 senijiqede pue aiqeisun ONINHYM SNOILINNA SNOIHVA euin ay jo peaye 10 gt si 4 99 NOA euin eulos aye JEU OS WOO eJnue ue SI jeuonipuoo DY eoueulJoped siy HUN JOOPUI ay 9 posn eq pjnous segueijdde 19410 15 u 5 Joad suun eui Woy Aurgedeo sun eu deex oi uidi 10 5949 109 O HOM ey ue p yons OS e jim Alljigedeo Buneoy 5196 ainjeiadua 9 0 5 ASN JOU jueiquie y sy payeay WOO pue
32. Possible manne oning Compressor pone Compressor Is the self diagnosis lamp mode as Blinking Jor shown on the right Outdoor air temperature Charge port pressure C MPa G kef cm G YES 50 2 96 30 14 45 2 62 26 72 2 31 23 58 2 03 20 73 1 78 18 14 1 55 15 79 1 34 13 66 1 15 11 74 0 98 10 02 0 83 8 48 0 70 7 10 0 58 5 89 0 47 4 81 R410 The values above are the theoretical ones Normal Stop to operate and check the gas Checking the IPM main P W B pressure in balancing mode Error Gas leaking When the self diagnosis lamp lights in the same condition as above Gas leaks Repair and seal refrigerant The compressor is defective Replace it and seal refrigerant If the compressor checker for an inverter type air conditioner is available re check using it Perform a final check of operation HOW TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT MODEL RAC 25YH5 RAC 35YH5 1 Turn off the power switch 2 Remove the electrical box cover 3 Turn on the power switch 4 After waiting for 30 seconds push the service switch for a second LD303 red will light and the unit will operate in the forced cooling mode at this time Never operate the unit for more than 5 minutes DC VOLTAGE CHECKPOINT Electrical box cover N
33. Running Not running Trouble shoot according to the self diagnosis lighting mode Open the indoor unit and check the voltage between pins Nos and 3 of CN3 on the indoor unit control P W B Normal DC35V 32 38V Brown Red Is the voltage correct Check if the connecting cable connected incorrectly inserted incompletely or disconnected Open the outdoor unit and observe the self diagnosis lamp LD301 Count how many times the lamp blinks Blinks other than 1 time Blinks 1 time instructions Can the unit be operated using the outdoor unit service switch See the nameplate on the outdoor unit for operating No V Check the refrigerating cycle In the event of overload limit cut or OH thermistor temperature rise use the self diagnosis memory function because 69 such failure may evade detection due to Check the outdoor ambient temperature variations or other factors electrical parts Yes Check the indoor electrical parts Yes CHECKING THE INDOOR UNIT ELECTRICAL PARTS 1 Power does not come on no operation Is AC220 230V being generated between terminals A and B on the indoor unit terminal board Yes Is DC35V or 20V being generated between terminals C and D on
34. ewes eui esn o uonng JAHAJSAU I ay sseJd oj juo ejouieJ DUI UI UI sDunjes euin eui sy e se seAJes 151 je euin jueuno 19 440 4JO NO pue s EM UI pesn eq ejejduioo mou uini jo eu ure 00 Je uo pauuni pue 10 w 00 peuoeai 1 eq 1 1959 14 ey yey os uo uin uou pue wd 08 01 1e YO eui Buneoy 104 4 REA Th m ur gun ey uo 5146 Q eui pue deeg siufi lt pue jo peoisui seis NO eur JAHISIU eui sseid pue 011009 YAWIL OU eu 19 0 11U09 eui JO Mopur euis eui S euin UO UIN eui 19 b ejojduioo mou si UO UIN ay JO eu ure 00 Je peuoeoi eq 4 1959 4 veur os uo JIM 241 QT 4 ejdurex3 C yun ey uo 5146 dwel 9 eui pue sanooo daag y 51461
35. mc Oy ja 02015297 10 D FMCHOP ovi 8298 1 8 FM 60 1 M pezos FG PULSE INPUT This model uses DC Fan Motor which has a controller circuit built in the Motor This DC Fan Motor will rotate by control voltage apply to Vsp input Voltage range 1 7 to 7V DC Vsp high Faster Vsp low slower Vsp lower than 1 7V stop Motor will output FG pulse by following this motor revolution Outdoor microcomputer will output PWM control signal from 5 by following the instruction from indoor microcomputer This PWM control signal will convert to Vsp voltage by smoothing circuit R242 amp C209 Fan motor will start to rotate when Vsp was proceeding over than 1 7V and generate FG pulse by rotation speed FG pulse will feed back to Outdoor microcomputer 5 DC Fan Motor circuit has to match the Fan Motor revolution with instructed revolution Such as FG feedback Faster Instruction Slower Decrease pulse width FG feedback Slower Instruction Faster Increase pulse width FG pulse is also used for Fan Motor failure detection Microcomputer will monitor FG pulse 30 seconds after start the fan motor If there is no signal detected it will consider that the Fan Motor was malfunction and stop the operation In this case LD302 on control P W B will blink 12 times Fan Motor lock detected R107 and IC4 are used for Fan Motor over current 56 lt Reference gt When operation stop with LD301 blinks 12 times it m
36. radio bring the remote control switch within 15 cm of the radio and press the ON OFF button V Does the radio buzz noisily Check the LED D1 with a multimeter Yes N Buzz Within 15 mare v 7 Check the indoor unit signal receiving P W If it is good check the main P W B AM radio You can check the remote control switch by other methods as explained below Using the test card Ultra redray test card Sensible area Check functions again If it does not work replace Within 2 cm the remote controller The sensible area should flash in orange when you operate the remote control unit if it is good 73 PRECAUTIONS FOR SERVICING Be sure that the power switch is turned off or the power cable is disconnected before servicing Removing the P W B s System Configuration of Outdoor Unit Electrical Parts The outdoor unit electrical parts consist of two P W B as shown in the figure lt Main P W B M board gt Contains a rectifier circuit and inverter module their controlling microcomputer and microcomputer peripheral control circuits The board incorporates high and low current sections lt Power P W B P board gt Contains a switching power circuit noise filter power factor improvement circuit etc The switch
37. 002 0 5 0295 09 0101 Buruan senunuoo Joopino ay jo y ey jo paloajas si 0015 ueuM ay apis ey jo uonoes yey wonog ya pue 1224 S19Ju Kuku piunysp pue Jo 6uljooo pue 2 002 JOOPINO ey JUN ey ey uonejedo esoy LINN 9000110 19104 tun eui se OS HUN 100pu pues 19104 Genno 1 19194 uonipuoo y Buimoys 91 19104 HUN JOOPUI ey wouy 1snp 1ue eJd AW LINN JO SNOILINNI ANY S3IAVN N sl MOT pue OLNY 183446 eui sseiq suonipuoo uo
38. 10 HOUS 4 ANOKA 1981U0N HJO UIN 10 1495008 eui pue Bunesedo 401 aseaja esue jeuuouge pinoys 3JONVNIJINIVIN ONILAIHS ONIHNA 0 pue O sjueuoduioo esneo seounos 19410 jo esn 941 pesn si aounos eseud e yey ans OYEN Sjoeye pjouesnou 19 syun 100pino pue ay sdoup y ui PUNO si eunjrej Aue esou eui 191EM 10 MOJ AINSUS NOLLNYI suoddns eui w jo Buroeds e peuoddns v eys 71 seb uoyeo Joopino 941 seb SI e DUI 1 1 jou oq Sjsixe xoous jo eui iexeeJq INOUUM pun jo eus ey uo Buipuedep eq pjnous sijne 10 sedid 199405 uexouq ul 14 esiweuio VOL pH 20 195 Buidid peyioeds eui esn eins 4oous 193NNOD
39. 100pino y ueuM SWIOJINEM SUONEIIUNUUWON E RT suuge v eun jesel 100puj 100pino of 4 19 31001 8 001 supo Lxo1dde Jopee Jepee jese1 ueuM ON Je eeu 100pino SUGE LLE sugG p Fgx SWE EEH SWOOL OWEIJ 41 9 DIH 1 suoneorunwwog jeuuoN 1euuo4 jenos Serial Communications Data 1 Outdoor message 000000 Fan 7 step request 1 Actual compressor rotation speed 5 MSB Actual compressor rotation speed 4 Actual compressor rotation speed Actual compressor rotation speed Actual compressor rotation speed 1 Actual compressor rotation speed 0 L Compressor during operation Compressor during operation Outside temperature 7 MSB Outside temperature 6 Outside temperature 5 Outside temperature 4 Outside temperature 3 Outside temperature 2 Outside temperature 1 Outside temperature 0 LSB Self diagnosis 3 MSB Self diagnosis 2 Self diagnosis 1 Self diagnosis 0 LSB Defrost request signal During forc
40. DC VOLTAGE CHECKPOINT 4 Unit top cover Cautions 1 If interface signal DC 35V terminals C and D are not connected when the outdoor unit is in forced cool mode the outdoor unit defect indicator LD301 will blink 9 times during operation to indicate communication error 2 If checking is done with the compressor connector disconnected the unit will stop and LD301 will blink 4 times Be sure to push the service switch for a second again to stop the forced cool operation C 1 Connect the large dia pipe side and small dia pipe side service valve using a pipe P Parts to be prepared N Connect the small diameter service Outdoor unit 1 52 union value and the large diameter service 1 Compressor 3 8 a 52 dl valve using the reducing union and ur copper pipe as shown on the right 4 Reducing union 2 Copper pipe 2 8 and 3 8 Ly 2 8 and 3 8 i r N 4 Copper pipe 1 1 2 8 Charge refrigerant of 300g Ke J after vacuuming xc lt Do not operate for more than 5 Waste i ay ate minutes P
41. B Z J CURRENT CURRENT WAS BEYOND COMPRESSOR tres CU MAXIMUM LIMIT OPOWER W C ABNORMAL LosT THE COMPRESSOR OMAIN P B LE LOW SPEEDIROTOR POSITION COMPRESSOR 3TIMES ROTATION POWER P W B SWITCHING FROM LOW OMAIN P W B SWITCHING oo tency SYNC START FAILURE position petection CCOMPRESSOR ATIMES OPERATION FAILURE GPOWER P W B A OVERLOAD OVERLOAD PROTECTION OOUTDOOR UNIT IS EXPOSED TO DIRECT UI Lower FUNCTION IS REQUESTING SUNLIGHT OR ITS AIRFLOW BLOCKED LOWER SPEED THAN MINIMUM OFAN MOTOROMAIN P W B STIMES LIMIT CUT spEED or COMPRESSOR OTHE VOLTAGE 15 EXTREMELY LOW OH THERMISTORCOMPRESSOR OVERHEATIOLEAK OF REFRIGERANT COMPRESSOR 2 TEMP RISE WAS DETECTED BY 90H THERMISTOR CIRCUIT 6TIMES OH THERMISTOR MAIN P W B THERMISTOR ABNORMAL THERMISTOR OTHERMISTORSCONNECTION SIS ABNORMAL VALUE OPEN OR SHORT OF THERMISTOR DEFECTIVE WAS DETECTED OTHERMISTOR CIRCUIT ACCELERATIONCOMPRESSOR WAS NOT Iai cay OF REFRIGERANT FAILURE ACCELERATED MORE THAN OCOMPRESSOR sud MINIMUM SPEED CABLE 15 WRONG CONNECTED eoMMUNI CA COMMUNICATIONS BETWEEN S E 15 OPENOINTERFACE TIONS ERRORINDOOR UNIT AND OUTDOOR OF BETWEEN INDOOR 9TIMES UNIT ARE INTERRUPTED UNIT AND OUTDOOR UNIT n ABNORMAL POWER SOURCE ABNORMAL ABNORMAL POWER SOURCE gt Zine OCABLE 18 WRONG CONNECTED Th Pm MAS DETE GMED OPOWER P W BOMAIN P W B FAN LOCK OUTDOOR FAN RPM IS OFA
42. TIT AC220 230V 3A FUSE DB1 R41 RAD O Leoort 02 Rool o lt o 0008 e SW TRANS W m us MO 35V gt N 227005 lt R23 e e 26312 RAB R46 14X15 D 0V N R01 17 D21 15V P e 21006 SR24 16 16 B 12V N XD31 18 022 12V v 15 0V p E 6 0 0 mre 5825 eee e WO i 12 19 ay 030 4 5 V DES 4 032 002 07 1 22 024 18 eN p e moi pager S 101 qua mt 003 STR L472 7 ay oi 21 72 623 ZT pog POIO x 5 20 OSS 1004 4 700 lt PAR o o dio d 23 i TS 2 20X21 e o e e e _ 0V C24 5V ddp qoum N 012 a i e ERI E 5 Micro 011808 Zm13 1 Computer 5 25 l lt 64 MAIN SUPPLY ON OFF 0106 In the power circuit for P W B power supply for microcomputer peripheral circuits and IPM driver circuit and as well as DC 35V are produced by switching power circuit Switching power circuit performs voltage conversion effectively by switching transistor to convert DC 330V voltage to high frequency of about 20kHz to 200kHz 47 The voltage specification of the power circuit is as follows lt Check points gt
43. at pin relative to OV at disconnected or reversed pin of CN3 If normal check the outdoor unit P W B Is 12V or 7V being output Replace ICP1 Check if the air Normal if it is less than 10 Blown open if it is 100 more deflector motor is shorted and p IC111 Q111 C114 20121 are defective Yes If shorted defective ICP1 will be Normal open again at relative to OV at of C114 Yes Open Replace the terminal board Insert the connection cable securely Has the terminal board thermal fuse blown open No Replace Q111 and IC111 Replace IC121 Check if a short occurs in the 5V line Is DC5V being generated If the 5V line is shorted ICP1 will be open again Yes Perform final operation check 1 When the unit is not in operation the voltage across the 35V line may drop to 20V X2 When the unit is not in operation the voltage across the 12 V line may drop to 7V CHECKING THE REMOTE CONTROLLER No 15 battery polarity correct ps Install the battery in the correct polarity Yes Yes Is the battery check sign g flashing Replace the battery No Turn
44. heat exchanger temperature heat exchanger temperature gt 15sec Control by HS heat exchanger temperature Control by heat exchanger temperature 10sec gt Operation lamp 10 Rating WSTD Compressor speed Outdoor fan Reversing valve cooling model Notes 1 Condition for entering into Hot Dashed mode When fan set to or Auto mode and i Indoor temperature is lower than 18 C and ii outdoor temperature is lower than 10 C and iii Temperature difference between indoor temperature and set temperature has a corresponding compressor speed calculated value in Table 3 larger than WMAX Hot Dashed will release when i Room temperature has achieved the set temperature SFTDSW ii Thermo off During Hot Dashed operation thermo off temperature is set temperature with shift value 3 C After thermo off operation continue in Fuzzy control mode Compressor minimum ON time and OFF time is 3 minutes During normal heating mode compressor maximum speed WMAX will maintain for 120 minutes if indoor temperature is higher than 18 C No time limit constrain if outdoor temperature is lower than 4 C During Hotkeep or Defrost mode indoor operation lamp will blink at interval of 0 5 seconds and 0 5 second OFF
45. C M 8906 100 1 M 5V R305 2310905 R233 10 5 C M 8907 5 1 18 OH THERMISTOR ons R234 100 5 C M R908 1 M aa M 151 6235 8909 5 vu M 4400KE150K R236 5 c M EN 10301 R237 10 5 1 8 C M R911 M To R238 100 5 C M R912 M 80 25 3400424 BLACK 239 100 5 C M R913 M OUTDOOR TEMP m R240 10K 5 V i C M R914 100K THERMISTOR 7 R241 5 6 506 C M 915 100 5 M R35 1 433 0 2 55552 105 1 2 24 2 1 5 C M 916 100 5 M 80 70 3400K 2 big 2436 98 196 1 16 C M R244 596 ov 245 596 c M R246 11 247 1 5 1 C M
46. T Te En Circuits 2 R514 10K 5 030 R654 10K 5 1 sw 032 R823 19 17160 017 C c802 0 15 50 063 R Sensor Unit Symbol ut ih R211 5 1 033 R515 25 R655 59 1 18 030 824 8 25K 1 019 C C803 FE 0302 28V C 045 731 EIE Circuit s Mode LIE ZD111 RD6 2UJN2 101 8212 47 5 016 C R516 10K 5 1 16W 030 C R656 1K 5 1 180 033 C R825 10K 1 1 16W 017 C 6804 Over Current Protecter Symbo pike R517 10K 5 030 826 696 085 2303 01 085 6 0 otalsovi Grit Model Rating RPMG9aa va 120 20121 220 098 R301 12 7 1 bied C Rote 59 17 6 R701 1K 5 iiau ova c 5 wor c 958 00 29V C 045 10 1000 50 c Symbol lt 2 Thermistor ZD131 RLZ6 099 2302 12 7 196 17160 018 8519 10K 5 17160 030 R721 3 3K 5 036 8828 196 030 C 823 0 0470 25v C 056 cceze 2o0 gal 103 mrs lan ZD141 RD5 6UJN2 100 R303 5 7160 030 C 8520 10K 596 030 c R731 2 7K 55 onl 007 A R829 5 1K 5 17180 040 C aI THESE TCI c824 0 014 50V C 055 IC
47. eui 5 164 SI einjesedwe WOO Juano uo Buipuedep 1009 10 1V3H jo y euruuejep eui 5 seu ueuM uoneJedo jo OLNY 2 sereorpui Kejdsip ey os NOILONNA 941 SSeJd SOLA ejnjejeduje ey ueuw jo eu peul ey uo Buipuedep 1009 10 jo y euiuuejep A eonewoine eu NOILV43dO JILVINOLNY 19 SI deajs JO JOU SI JoNUOD ONY 72 sejes INOA jnsuoo oiny OP NOA J SION uonoeJip pue snoad PIHEISII eq ey eu uo uos ueuw A ddns 1emod ey 10 5 s Jemod ey Aq peddois Jou si aui sy uonoeJip pue peuunsai si Jamod ey aq uoneJedo anpe amod e 10 e s y
48. Conductive sponge Fig 1 Conductive Container 2 When any part is handled uncovered in counting packing and the like the handling person must always use himself as a body earth Make yourself a body earth by passing one M ohm earth resistance through a ring or bracelet 3 Be careful not to touch the parts with your clothing when you hold a part even if a body earth is being taken 4 Be sure to place a part on a metal plate with grounding 5 Be careful not to fail to turn off power when you repair the printed circuit board At the same time try to repair the printed circuit board on a grounded metal plate Body earth Elimik conductive band gt Clip for connection with a 1MO grounding wire Fig 2 Body Earth 6 Use a three wire type soldering iron including a grounding wire Metal plate of aluminium stainless steel etc a Working table Resistor of 1 MO 1 2W e Earth wire Bare copper wire for body earth Fig 3 Grounding of the working table Soldering iron Grounding wire Screw stop at the screwed part using a rag plate Fig 4 Grounding a soldering iron Use a high insulation mode 100V 10 or higher when ordinary iron is to be used 7 In checking circuits for maintenance inspection or some others be careful not to have the test probes of the measuring instrument shortcircuit a load circuit or the like A CAUTION 1 In guiet operation or stopping the
49. Huo e 10 BUIBUIMS jejuozuou ey deex jou op uonesedo V Sesoj 1e ino ey eeu eui1e sdojs pue JOjoejep jejuozuou eui peddois si eui 5 Bunsn pe eui uiui jejuozuou esp 0 SPEJS Joj2e jep BUI Kew spuooes 9 1noqe spuooes eje eg jueuno ui 50015 ey urepe passaud si eui Jj dn sums 10j99 jep Jejuozuou au souo passed si ONIMS CX J a ONIMS O1nv au Buisn eui oi 195 osje pue jysnonunuoo umop pue dn eq uto eu a gejins ejBue 19d01d ay 01195 1 ejuozuou eu suonoeup pue ey ui peuonipuoo ey jo 84801931430 HIV JHL INILSNFAV pL 1xeu 00 9 1e peuoeai Jsowje 195944 eui yey os jreo uo uun pue ur 82 16 sinouz UI yo UUNI eui eseo SIU UI xi Buneeu 104 euin deejs ey 195 pue 43318 gt mv y 59 4 SU 195 L jewn uo Ag uo pue 191
50. When heating mode starts it will enter into Hotkeep mode if indoor heat exchanger temperature is lower than YNEOF 0 33 C When fan is set to Lo compressor speed will be limited to WBEMAX When fan is set to Med compressor speed will be limited to WJKMAX In Ultra Lo fan mode if indoor temperature is lower than 18 C indoor fan will stop If indoor temperature is higher than 18 C 0 33 fan will continue in Ultra Lo mode During Hotkeep or Defrost mode fan will continue in Ultra Lo mode 10 During Hot Dashed when room temperature reaches set temperature SFTDSW compressor speed is actual speed x DWNRATEW 25FH5 35FH5 1300 min 1300 min 1 66 1800 min 1800 min 2 00 C 2300 min 2300 min 2 33 C 2800 min 3300 min 3800 min 3800 min 2800 min 3300 min 3800 min 4300 min 2 66 C 3800 min 4500 min Reversing Valve Defrosting Heating Sleep Operation 15sec or more Auto fresh defrosting Over defrosting inhibit period el 30sec Fan speed Start Stop button set to Hi Defrost signal Preheaingjudgment 212052379 release Med Lo Ultra Lo Sleep button AA NAA 30sec 2min 30sec cycle perio Reverse cycle period ome EE Timer lamp Remote control Sleep ON
51. 0111 Te Fan Motor 111 3 3 m S O LE 3 5 l EE Hj a E ke 5 IE gt ni ROTATION no LO ep DC FAN OUTPUT ov Micro Computer Fig 6 1 First 35V power which operates the indoor unit is generated by the power source section of the outdoor unit and supplied to the indoor unit through the C and D lines of the connecting cable Second use the DC DC converter and the 35 V power supply from the outdoor unit to generate 12 V control power which drives the stepping motor during the operation In addition use the regulator IC 121 to generate 5 V power required for driving the micro computer and controlling fan motor If the terminal block was overheated due to a connecting cable improper connection the thermal fuse built in the terminal block will burnt to shut off the 12 V line and stop the operation of the indoor unit Then the outdoor unit cannot be communicated with the indoor unit and a communication error occurs the outdoor LD301 will blink 9 times stop all operations 33 7 Fan Motor Drive Circuit CN10 35V 0 computer N DC fan motor output W 1 OJ Fan motor R751 C751 JON DC fan motor ov Speed A feedback R631 06831 7 Fig 7 1 Voltage at point Waveform T1 Low speed T2 High speed Voltage at point B Waveform T1
52. 24 s D N v Room Temp 7 Lr EE sid 1201 P35 S o S 6 1 AUTO SWEEP2 U 2 O oo 53 L me N E eee 3 R141 2 0v 9 9 gt SDA 4 1719 19 LI 2124 28 29 30 31 1764 SCLIG e zt NE 8 5 N R767 L763 c40 N V Sensor RESI gt 8756 1762 HL 6 4 To Unit 0v QA co a 5 G 00 RR 4 vee R765 L761 0201 Operatidn GND S Md LD203 Fi 9 N 1 as 5 P 2 e N db m XH 4P Top BLK y 3 Room temp s Terminal y n 2 1 Te 5 w R701 D O ANY R211 V OV CN2 CZ 12P Side Board In Capacitor Transistor Diode IC t Haner ical sumerical E Power anis Power anis 3 tirit Numerical 2 Power baiti 2 mimma 1 Cirevit s Nunericall E rains 2 ET TE Circuit s Model Drawings 2 opet baat X TAS Coil Connecter Simbol Value S s veris Symbol Walue 0 SS Vars WS Sm Valve S W 5 Value 2 2 Symbol Value P LE Model amp Symbol parts No bon Model Model raving s Circuit slNumericallRating amp Model Dai 2 27K 25 wm o mos vi usc 8877 iok tsali
53. 6 7K sew we o Lm he usle pr mime mex N W WONEN Waroo oee PYN R112 25 17161 009 c R306 1 5 033 C101 0 220 SOV F 08 IR Togog 0 tulesvic os jo 9111 1285518 076 mei 1 2101 05 2 081 6 10111 2940 0820 ae aeli a mn R307 1K 25 033 R762 10K 5 6 009 A C102 3304 50V in 065 R 8112 25052094 074 0803 2503441E 072 08215 LONEN ee mata Sm Lu TE M Tep 117 R114 750 55 010 8401 390 596 1 11 027 R763 10K 5 1 6 009 A 100 40 c505 o tal25v C 045 Q113 074 C 0121 188355 095 ide BOARD IN 0821 256473868 073 560 0 6 113 2 IN 123 H C104 0 1 25V C 045 0114 RN1102 078 0401 HN1D03FU 093 16401 18 24 4 084 115 560 5 011 8402 390 596 027 C506 0 14 25V C 045 L201 801148015 0 24 110 C CN3 XA 3P Top 118 H R116 5 1K 59 1 040 R551 10 5 1 18 041 R765 390 55 17161 027 C AIKAISEN 0507 0 1 257 C 045 8115 23411627 079 TFE L501 1025 CN4 PH SP Top 119 R117 68K 5 olc 8404 amp 1K 5 0 C 8552 696 c 8766 5
54. 804 0 015 RI P C805 6850 D R P C806 0 1550 F R P c809 0 01 c R P C810 0 0115 C R P C820 10025 D RIP BLOCK DIAGRAM MODEL RAS 25FH5 RAC 25YH5 RAS 35FH5 RAC 35YH5 Power source 10 50Hz 220 230V POWER INDOOR UNIT OUTDOOR UNIT SWITCH POWER RELAY RECTIFIER Inrush current Protection circuit HARMONICS IMPROVEMENT CIRCUIT Outdoor DC fan motor IPM Rotor magnetic pole position detection circuit Microcomputer clock circuit Remote controller LK rae VF circuit gt Buzzer circuit Room temperature mu Filter thermistor Indicating lamp Operation Timer n x E f Heat exchanger gt 5 M A TT motor for thermistor GERED o o o 5 o Temporary switch _ Indoor Outdoor lt interface circuit Initial setting circuit gt gt DC fan motor drive lt circuit Reset circuit y Indoor DC fan motor DC35V Outd
55. Voltage at point Waveform 1 1 1 1 1 T2 i 1 1 1 1 1 1 Fig 7 2 For the point 15 7 kHz PWM pulse will be output from the pin on the micro computer as shown in Fig 7 2 The pulse range will vary with different command speed The pulse is converted into the analog voltage by the R751 and C751 and applied to the fan motor as the speed command voltage 1400 Fig 7 3 shows the relation between the voltage at the pointB and the speed Some differences will occur due to the condition of the unit The fan motor outputs the feedback pulse of the speed which is input into the pin on the micro computer This pulse is eguivalent to a freguency of 12 60 speed Example 1000 min 1 x 12 60 200 Hz Fig 7 3 The micro computer monitors the freguency and adjusts the output pulse range of the pin 4 so as to keep the command speed If the feedback pulse is 100 min 1 or less due to a locked fan motor or failure the fan output will be stopped temporarily as fan lock error After 10 seconds restart the output of the pulse If fan lock error is detected twice within 30 minutes all units are stopped and the unit will come in the failure mode The timer lamp will blink 10 times Speed min Voltage at point B V 34 MODEL RAC 25YH5 RAC 35YH5 1 The electrical parts for the outdoor unit is composed of two P W B a power PW B and main P W B and a harmonics improvement circu
56. 212 10009 sovjet eor o os 9116 RN 102 078 225 2 PH 0P Top use H R118 75K 206 021 R767 390 506 17160 027 C ED TT T 2 c522 0 220 10v C 057 TT E LED TET PH iTP Top 120 H R119 6 8k 2 022 C R501 1M 5 1 16W 041 C a 0523 0 1y 25V C 045 C Model Duns 10521 RNSVD42C 089 C 1701 8101146015 0 24 110 C CN7 XH 4P Top BLK 121 H C524 0 tal25v C 045 CN8 XH 3P Top 125 H R121 0 56 596 1 AN 008 C R503 10K 5 1 1eW 030 C R602 10K 5 1 16W 030 C 8804 120K 596 1 81 039 C IE j m Tama 10201 HLMF K305 133 H 08211188255 998 0 0 4 R122 100 5 042 c rsoa 10K 596 R805 120K 5 17180 031 C TI a TT ceo1 011125 045 LD202 HLMF K405 0 134 H L751 16080 1025 CN10 XA 6P Top 122 R123 5 043 c 8505 10K 5 1 tew R611 1 5 006 A R806 120K 596 17160 031 C N pue 068 R c611 1000p sov c 047 LD203 HLMF K505 135 H Oscillator 10801 MMESUSN 085 10 L752 180800 1025 C Rizal 100 55 042 c R506 10K 596 1 teW 030 R807 4 5 038 c 1299 018 26V 10 Circuit Model mE Switch CN12 R125 5 009
57. 32 32 0 RAS 25FH5 RAS 35FH5 75 2 27 3 81 1 89 6 35 3 95 5 RAC 25YH5 RAC 35YH5 POWER SOURCE DC 5V 35V 140 350V OUTPUT 25W 40W CONNECTION BLU BLUE YEL GRY GRAY ORN BLK BLACK PNK Control circuit built in YELLOW BRN BROWN ORANGE GRN GREEN PINK VIO VIOLET MAIN ELECTRIC COMPONENTS FOR OUTDOOR UNIT WHT WHITE RED RED NAME RATING APPLICABLE MODELS REVERSING VALVE COIL 135 Q 20 C RAC 25YH5 RAC 35YH5 REACTOR L1 13 mH 0 224 Q RAC 25YH5 RAC 35YH5 REACTOR L2 25 5 mH 0 37 Q RAC 25YH5 RAC 35YH5 FILM CAPACITOR 45 uF RAC 25YH5 RAC 35YH5 17 COMPRESSOR MOTOR Compressor Motor Specifications RAC 25YH5 RAC 35YH5 ITEM COMPRESSOR TYPE EU1011DF POWER SOURCE DC 220 350 V OUTPUT 800W WINDING YELLOW RESISTANCE 2M 1 069 2 1 300 COMPRESSOR YELLOW FRONT SIDE OF OUTDOOR UNIT ACAUTION When the refrigerating cycle has been operated for a long time with the capillary tubes clogged or crushed or with too little refrigerant check the color of the refrigerating machine oil inside the compressor If the color has been changed conspicuously replace the compressor 18 WIRING DIAGRAM A CAUTION MODEL RAS 25FH5 RAC 25YH5 RAS 35FH5 RA
58. Room Thermo judgment ON temperature Thermo judgment OFF Outdoor Thermo judgment ON temperature Thermo judgment OFF Room temperature ATCMAX Temperature set for cooling and dehumiditying value set by remote control Table 2 Compressor speed Calculated Temperature compressor speed difference Fan speed set to auto 25FH5 35FH5 with shift value Start stop button Start Stop Start 1900 1900 min 1 66 C ee 2400 2400 min 2 00 C 2900 2900 min 2 33 C 3300 3400 2 66 C 3300 min 3800 min 3 00 C Engaged in the set fan speed in cases other than auto fan speed Rating Compressor speed Outdoor fan Reversing valve cooling on mode 2min 30sec 2min 30sec Notes 1 Condition for entering into Cool Dashed mode When fan set to or Auto mode and temperature difference between indoor temperature and set temperature has corresponding compressor speed calculated value in Table 2 larger than CMAX Cool Dashed will release when i a maximum 25 minutes is lapsed and ii room temperature is lower than set temperature 3 C thermo off and iii when room temperature has achieved setting temperature 1 C then maximum Cool Dashed ti
59. The operation method is the same as How to operate using the connector to servicing the outdoor unit x The charging amount of 200g is equivalent to the load in normal operation 84 IPM Intelligent Power Module DIAGNOSIS SSM1001MA Circuit diagram of the device O Collector A Emitter Circuit diagram of the module HIN HS LINT LIN3 CO3 Terminals symbol mark of the module See next page for measuring value using multimeter 29 Fail signal 35 INVOV 36 0V 37 N 39 W 40 V 41 U 42 32 302826 31 292725 2119 85 Diagnosis procedure of IPM using multimeter Inverter section gt Set the multimeter function to resistance x 100 If the multimeter dose not have x 100 range please select its range from x 1 to x 100 The judgment shall be OK When the measurement was high resistance Please consider that the probe polarity will be reserve when use a digital mulimeter due to its battery connection inside lt note gt Sometimes it may misjudge as OK because of low conductivity when power module was damaged as disconnect mode In this case please check the resistance by reversing the probe pola
60. ay 10 NOILV43dO INILVIH l 0 MOT 0 euin 1xeu 4015 19 19 991 55 oyne 19591d ay seuoeoudde sy eui 104 eu UI UI sbumos SUI sy M eamejedujei 195914 eui IH eui UI 115 uonejedo i a woo ey 19 NOA se uoos se 1115 IM uonouny Buiooo 94 SiuBip 1461 e 1958919 ay seuoeai eui 104 40157 jo peeds ue au JOUDIU SI Buas ji Hers Jou seop UONUN LVIS ay uonejedo dois e spejs uogejedo dOLS 1HVLS O 4 ssa1d suonipuoo uo Buipuedep enjejeduue woo jenjoe y pue eu uonesedo Buneeu Burooo y si peeds o1 v ue
61. 104 10 2 02 pesuepuoo ey pejejnuinooe peu zey esiou pue esoy y ui jueseJd ure Bulyons ue jo OSION si uonesedo ji ua e eje1edo yun 100pino 10 asiou 14 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAS 25FH5 RAS 35FH5 mm INDOOR UNIT Unit 50 Service space Top air suction grill 220 780 Front panel Mounting plate N L Le Air outlet a Horizontal air diflector 47 die 190 400 190 70 When piping is L drawn from the left side exchange the drain hose for the drain cap About 108 Drain hose About 370 About 70 Drain cap connection port Narrow pipe 6 35 47 i Vertical air diflector gt lt R gt Power cord Connecting cable 15 Wide pipe 9 52 Cabinet 50 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODE
62. 9 HWRACDIEX Aos 1 SOUNDPROOFCOVERASSEMBLY 92 HITACHI RAS 25FH5 RAC 25YH5 AW NO 0023E RAS 35FH5 RAC 35YH5
63. Indoor fan Deceleration period 12min Max le EIE TDFA12 TDF413 TDF421 1min gt Med TDF 422 2400 STARCPL STARCPL 1950 3000 SGMNRP 0 Notes 1 The defrosting inhibit period is set as shown in the diagram below When defrosting has finished once the inhibit period is newly set based on the outdoor temperature when the compressor was started During this period the defrost signal is not accepted 2 If the difference between the room and outdoor temperature is large when defrosting is finished the maximum compressor speed WMAX or WMAX2 can be continued for 120 minutes maximum The defrosting period is 12 minutes maximum When operation is stopped during defrosting it is switched to auto refresh defrosting 5 Auto refresh defrosting cannot be engaged within 15 minutes after operation is started or defrosting is finished Upper limit WBEMAX 1 The sleep operation starts when the sleep button is pressed 2 When the sleep button is set the maximum compressor speed is limited to WBEMAX and the indoor fan is set to sleep Lo 3 The indoor fan speed does not change even when the fan speed mode is changed Sleep Lo 4 When defrosting is to be set during sleep oepration defrosting is engaged and sleep operation is restored after defrosting 5 If sleep o
64. RESISTOR 8906 8905 Id DETECTIVE CIRCUIT gt o 1 o Deo ons Oo ons Or HV 0923 1 66 6916 7007 63110310 15V 15 0V C900 R907 R909 0502 V IP limiter os Computer Fig 4 1 Intelligent power module circuit U is ON is ON 43 Intelligent power module switches power supply current according to position of the compressor motor rotor The switching order is as shown in Fig 4 2 At point U is ON is ON circuit in Fig 4 1 At point U is chopped OFF is ON circuit in Fig 4 4 vt wt PD vt Upper arm gt Lower arm b 7 _ 7 Ve W Fig 4 2 Switching order of power module Upper arm transistor is controlled to ON OFF by 3 3kHz chopper signal Rotation speed of the compressor is proportional to duty ratio ON time ON time OFF time of this chopper signal Time in Fig 4 2 shows the switching period and relation with rotation speed N of the compressor is shown by formula below N 60 2 X 1 T Fig 4 3 shows voltage waveform at each point shown in Figs 4 1 and 4 4 First half of upper arm is chopper second half is ON and first half of lower arm is chopper second half is ON U transistor chopped U transistor ON Voltage at 4 280V 300V keel Chopping period Chopping period 30
65. Voltage at 7 5 0V of microcomputer Fig 1 2 The reset circuit initializes the microcomputer program when power is ON or OFF Low voltage at pin 7 resets the microcomputer and Hi activates the microcomputer When power ON 5V voltage rises and reaches 4 4V pin D of IC521 is set to Hi At this time the microcomputer starts operation When power OFF voltage drops and reaches 4 2V pin of IC521 is set to Low This will RESET the microcomputer 30 2 Receiver Circuit 43 RECEIVER I P R611 Microcomputer OV Fig 2 1 IRR light receiver unit receives the infrared signal from the wireless remote controller The receiver amplifies and shapes the signal and outputs it 3 Buzzer Circuit 4 0 R721 62 1 Microcomputer 10711 Buzzer output 60 1 Do 99 Fig 3 1 Buzzer circuit When the buzzer sounds an approx 3 9kHz square signal is output from buzzer output pin of the microcomputer After the amplitude of this signal has been set to 12Vp p by IC71 1 it is Metal diaphragm applied to the buzzer The piezoelectric element in the buzzer oscillates to generate the buzzer s ps _ sound 4 an o Sound wave asi gt p eu Fig 3 2 Buzzer Operation 31 4 Auto Sweep Motor Circuit 12V Auto sweep motor for CN4 h
66. Indoor fan Hi See basic operation Cooling defrost signal Sleep Li leep Lo Hi See basic operation Outdoor fan Indoor fan Med gt See basic operation Lo 15sec Horizontal Shut Outdoor fan air deflector Horizontal Facing down Reversing valve Compressor speed cooling model Balance period 3min tein SDMAX or SDRPM Notes 1 The sleep operation starts when the sleep button is pressed 2 When the sleep button is set the indoor fan is set to sleep Lo 3 The indoor fan speed does not change even when the fan speed mode Compressor speed is changed 4 If sleep operation is canceled by the cancel button or sleep button all data is cleared Table 3 Compressor speed Basic Heating Operation Calculated compressor speed Temperature difference with shift value Heating set temperature remote control set temperature Dash period Fan speed set to auto Stop Start Stop Start stop button Start Thermo OFF a Thermo Thermo OFF gt 2 Control by heat exchanger temperature Thermo judgment Max 3 min Preheating released Defrost signal E Preheat released Preheating judgment Ultra Hi 30sec 105 Lo a lt Ultra Lo 30sec 30sec 105 Indoor fan 15sec Control by Control by
67. R266 390 5 M 58 7 1 N R25 1 5 1 4 Al P R267 390 5 F 8268 5 i stot tat lol R276 100 5 1 C M 2 ss 1 n St R34 P R277 100 5 c M 1870 SISIST alai R35 16 8k 5 1 R P R278 100 5 c M UN ov R279 100 5 M 5 3 1 8280 5 78 5V 9 R281 5 M STSTST R39 2 R P 3 Ir NEST R41 1M 5 Al P R283 5 5 L Ex R42 10K 59 1 0 Al P R284 2 9 zag R285 4 7K 296 M N 82865 1 2 M 4 Dis R45 220k 5 R287 1 2 M ov R46 220 5 2 R288 51 5 40 R47 5 6 P 8289 5 5 It C M R290 5 M 1 R291 5 ey x R292 2 0590 R293 390 5 M t R294 390 59 M 02018597 N RENE LL Us R295 390 5 M 4 4 apa A R296 390 5 0106 i JT ze 545 w RO02 225 5 8297 5 It C M 0801 7 1 dv ati 3 2 2 3 R003 36000 5411 2 M 8298 5 1 5 M oi 004 6 5 1 2 A M 22 0820 CNAB ens T 1 96 1961 6 A P R300 2K 5 M X MIT 22 0219 006 1 19 1 5 Al P R301 74K 196 C M o 2 5 ROO7 100 5 10 H P 8302 3 01K 1 gi E 222 m D 008 240 5 1 2 R303 01K uz TB SL R304 100 5 M Ds Eu I do
68. R35 8 4 E R101 1 8K 1 1 0 C M 8305 100 5 1 8 c M z 020 R102 196 M 8306 100 5 c803 3 R103 3901596 1 15 M 8307 5 TERMINAL ov R104 15K 5 C M BOARD R105 4 7 5 116 C M 8401 100 5 P R106 5 C M R403 5 ov R107 0 24 058 2 R M R404 5 sv 4 RUT a E PROM R108 1 8K 1 M tits sulo e Riool 15K 5 lvl C M R501 2K 5 M O 357878 IST TE 55 py tO WHITE R502 2 5 3 ad ET R503 2K 5 16 C M R iu OV ORNA R195 3901 5 8504 5 R196 3901596 8 M R505 2K 59 It C M 0 4 coor T R197 390 5 C M R506 2 5 OY R198 390 5 1 8 C M ania R199 1001 5 8 C M R513 5 It C M mE NORMAL BAM R200 10K 59 C M 8514 5 5 REVERSING 0 35 R240 lt R201 0K 5 VALVE 12V 12V R231 FOR ma 2202 5 C M R601 2 5 MBE coda R230 sv enzo R203 25 8602 2 5 Top un R204 2 5 R603 2 5 1 1 m 9 ind Em ove R205 1001596 C M R604 100 5 M 121 7 5 JN RI tw R290 R206 596 C M 8605 100 5 78 M VH2P a Kleef Omat 280 R207 5 C M R606 100 5 It C M 5 R226 R208 10 5 1 C M R607
69. ees 19 JOU 511 1 1514 SWI JUNO OU 195 43315 JHL 138 01 MOH 11 eJ ey HO WIN JO jewod y HO YAMS HUN ey jo p pue Kep e uo Kep e prey 10 01 peads eui pue ey Ag Hun y uny 440 ONOT JO 76 ey pue eoeyns y Aay esneoeq usniq 10 19UUIU eujoseb euizueg 90y JOU BSN poys esneo SIU pun eui JO Apog ey 12 10 usejds jou oq V 11 1nd Anubis sejoy y jeued y Buisojo pue 4 way Ajainoas pue yun y sdeis eui 0 eui O ysnd spuey suue pue JO SYEYS BUIBAON 104 UHM peuedo s aU ueuM dais eued 14014 ey pue Spueu eued pjoy oi eins eg Jeued jo e gnoJi sesneo 30 19 9281 euis 10 S1O EDIPUI 16 6
70. flow and breeze When operation is started the compressor rotation speed goes to maximum to increase the heating or cooling capability so noise becomes slightly louder This does not indicate a fault The compressor rotation speed changes according to the difference between the thermostat set temperature and room temperature This does not indicate a fault There may be a difference between the set temperature and room temperature because of construction of room air current etc Set the temperature at a comfortable for the space Preliminary operation is performed for one minute when the power switch on and heating or dehumidifying is set The operation lamp blinks during this time for heating This does not indicate a fault TROUBLE SHOOTING RAC 25YH5 35YH5 PRECAUTIONS FOR CHECKING Indoor Controller Outdoor Controller Power Switch oTo P Point s N WARNING UU F 400uF M x2 Compressor motor d Gran Remember that voltage of 175 Vis applied to the OV line Main P W B on the P W B or the like as shown in the right diagram Voltage at point A 7 SN 4 N N 7 N 1 TIV N Ground voltage N i N E gt 350V N Pd 7 N 175 Point B OV line Always keep your hands N WARNI NG and metal
71. it as necessary before stopping lamp lighting operation Fan speed does not change when fan speed selector is changed At this point fan speed is automatic during auto operation This is because Nice temperature reservation function is operating This function starts operation earlier so the preset temperature is reached at the preset time Operation may start maximum 60 minutes before the preset time When on timer has been programmed operation starts before the preset time has been reached Does Nice temperature reservation It does not work It works only during cooling function operate during dehumidifying and heating This is because Nice temperature reservation function is operating The start time varies according to the load of room Since load varies greatly during heating the operation start time is corrected so it will vary each day Even if the same time is preset the operation start time varies Has the clock been set Timer cannot be set unless the clock has been set The current time display The current time disappears When the current time is disappears soon in approx 10 seconds The set the display flashes for time set display has priority approx 3 minutes The timer has been programmed Is the current time past the preset time but the preset time disappears When the preset time reaches the current time it disappears 59 When the Sleep timer is se
72. operation for 5 to 10 seconds During the initial operation measure each pin of the CN15 0 to with a multimeter If no change is found around 0 9 V or 12V in this step the expansion valve or the micro computer has failure The logic waveform during the operating of the expansion valve is shown in Fig 9 2 Table 9 1 Lead Drive status wire 1 2 3 4 5 White ON ON OFF OFF OFF Yellow OFF ON ON ON OFF Orange OFF OFF OFF ON ON Blue OFF OFF OFF OFF OFF Operation mode 1 2 3 4 5 6 7 8 VALVE CLOSE 8 7 6 5 4 3 2 71 VALVE OPEN Pin No 200ms Fig 9 2 55 10 Outdoor DC Fan Motor control circuit Motor coil RC Filter POWER P W MAIN P W B A U amp 14803 IA FUSE C101 4 Vs O 3 E DU T a ger 15V a 3 n 7 i 04 e OV A i zee R107 5 i i A Ax nnen control voltage Vsp ui R108 qiue ij NS CN24 5 7 S R109 lt AW L 8104 E TK 02 27 o o 5 o w 1 7V 0101 DC fan motor with control board a t Microcomputer 5 1040 Gi 1 2 R283 65 FAN 1d
73. pull the center of the front cover forward and release the claws 2 Hold the front cover at both lower sides and pull them forward to remove LOI J mum DE Fig 3 3 Control P W B and Indicating P W B 1 Remove each connector from the lead wire 2 Remove the four P W B supports from the control P W B 3 Pull the support hook at the upper side of the indication lamp of the indicating P W B and pull out the P W B forward P d WS ok 91 Control P W B 0 G N Qvo Support hook Indicating P W B Fig 4 87 4 Tangential air flow fan and fan motor 1 Remove two screws locking the drain pan 2 Press to lower the hook at the center of the unit a little and pull the claw forward to remove the drain pan Fig 5 3 Remove the screws from the upper and lower bearing covers 4 Remove the locking hook of the lower bearing cover from the Cabinet Upper bearing cover Lower bearing cover Cabinet Fig 6 5 Remove two lock screws from the fan motor holder 6 Pull up the evaporator by holding it at the lower side Insert a screwdriver through the space between the evaporator and drain chute and loosen the fan lock screw to remove the fan and fan motor OUTDOOR UNIT RAC 25YH5 RAC 35YH5 1 Electrical parts 1 Remove the ser
74. running slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally but this noise is not abnormal for the operation 2 When it thunders near by it is recommend to stop the operation and to disconnect the power cord plug from the power outlet for safety 3 The room air conditioner does not start automatically after recovery of the electric power failure for prevent ing fuse blowing Re press START STOP button after 3 minutes from when unit stopped 4 If the room air conditioner is stopped by adjusting thermostat or missoperation and re start in a moment there is occasion that the cooling and heating operation does not start for 3 minutes it is not abnormal and this is the result of the operation of IC delay circuit This IC delay circuit ensures that there is no danger of blowing fuse or damaging parts even if operation is restarted accidentally 5 This room air conditioner should not be used at the cooling operation when the outside temperature is below 10 C 14 F 6 This room air conditioner the reverse cycle should not be used when the outside temperature is below 15 If the reverse cycle is used under this condition the outside heat exchanger is frosted and efficiency falls 7 When the outside heat exchanger is frosted the frost is melted by operating hot gas system it is not trouble that at this time fan stops and the vapour may rise from the outside heat exchanger SPECI
75. siy e 30M JOU SBOP 1 ejoujeJ eui ueuM dors pue EIS 01 YMS SIU esp e HOLIMS AHVHOdI 3L s UI UDUM 51461 dwej 5141 eui uoee 01 6 10 100pino eui JO JeBueuoxe 1eeu DUI uo SWOJ 1501 ueuw Jnou ue eouo peuuojied eq Buung 2 dn Bures Jaye 5 1noge 104 Hunga 4 Buneeu Buunp seseo eui JNYI NOILVHAJO SUL uonejedo Buunp 51461 siy L NOILVH3dO peddois si ey ANNM pesseud si ONIMS 1 9 eur y ueejo 0 5146 HJ TI eui sunoy 00g 1 10 101 10 si eui ueuM 49919 dv 931714 SNOILVOIGNI LINN YOOGNI L Vd 10 SNOIL NN ANY S3INVN zijn 882 9vG 092 SHASE OVH SHASZ OVH LHOI3H pue Hod ureip eui uo edid y si ay eae BU UI Kew saem uons yun 1 ey JO HOT eui 19109 JOU onp 10 ejesuepuoo uonejedo uMop sued
76. the indoor unit terminal board Yes 15 the control voltage being generated normally 12V line 12V or 7V 5V line 5V Yes Do the air deflectors perform initial operation when the power supply is turned on after off No Is the microcomputer reset input pin Hi Yes Is the microcomputer clock signal 10MHz at pins 9 and being generated normally Yes Replace the control P W B No Is AC220 230V being generated at AC outlet Yes No Is AC220 230V being generated between terminals A and B on the outdoor unit terminal board Yes Is DC35V is being generated between terminals C and D on the outdoor unit terminal board No Are C and D connection cables reversed No Yes Check AC outlet and breaker and repair any defective part Check the power cable power switch and terminal board and repair any defective part Check the indoor outdoor unit connection cable and correct any defective section wrong connection incomplete insertion Ze Yes Yes No Connect the cables correctly Check the outdoor unit power circuit and repair any defective part Check according to the proper method for check
77. 0 548 280 548 220 288 47 220 288 47 NET WEIGHT 9 5 35 9 5 35 x After installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT FEBRUARY 2007 Hitachi Household Appliances Wuhu Co Ltd TYPE COOLING CAPACITY HEATING CAPACITY DIMENSIONS mm 1 10 11 SAFETY DURING REPAIR WORK In order to disassemble and repair the unit in question be sure to disconnect the power cord plug from the power outlet before starting the work If itis necessary to replace any parts they should be replaced with respective genuine parts for the unit and the replacement must be effected in correct manner according to the instructions in the Service Manual of the unit If the contacts of electrical parts are defective replace the electrical parts without trying to repair them After completion of repairs the initial state should be restored Lead wires should be connected and laid as in the initial state Modification of the unit by user himself should absolutely be prohibited Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in advance In installing the unit having been repaired be careful to prevent the occurence of any accident such as electrical shock leak of current or bodily injury due to the dro
78. 0I2E H P DIODES E C001 o 019 ci RIP 002 0 CI RIP SYMBOL MODEL E 003 HIP PHOTO COUPLERS DB1 025860 C006 M DB2 010 860 SYMBOL MODEL 007 0 011235 RIP 083 D10X860 TLP421 008 0 01 83 RIP Pa TLP421 coool o 150 cl RIP 002 1GH46 20401 TLP421 100o D 003 1GH46 0402 421 HIP co11 947 5 F H P 004 1GH46 PQ403 TLP421 C012 oorlel RIP 0404 TLP421 cotal o 01 85 RP 20 RL4 PQ701 TLP421 HIP 021 1012 022 RN2Z CO21 4004200 HIP spa haz ils COTES INDUCTORS C022 400470 D HIP zje SmeoL RATING 5 030 189120 568 A P C100 0 01 X C RIM 081 26016 ALP LOO 2 HFTOBTLS 5 6R P C101 0 082425 F H M 032 AG017 L003 J W A P C102 0 125 cl C M E D001 189120 EERE 1102 c200 0 125 C C M L8O1 RRMF3787 c201 0 125 0201 ATT L8O2 HFT0BTLG Al P c202 0 125 88093573 204 0 047 50 C M 0204 DANZ02K 4 0206 DAN202k mn 0206 N a 1901 800106215 paista M 208 0 125 0501 NP M RRMF3484 HI P 6209 0 004750 C C M 210 0 04750 c C M ES SURGE ABSORBERS IE 2 12516 0702 SYMBOL RATING 213 0 04750 C C M VS1 15 10 P 621
79. 0p sec ON Upper arm transistor Current at Fig 4 3 Voltage waveform at each point When power is supplied U V because of that Ut is chopped current flows as shown below 1 When Ut transistor is ON Ut transistor gt U coil gt V coil gt V transistor gt DC current detection resistor gt Point Fig 4 1 2 When Ut transistor is OFF by inductance of motor coil U coil gt coil gt transistor gt U diode gt Point Fig 4 4 44 DC VOLTAGE C100 040 1d DETECTIVE RESISTOR Fig 4 4 Power module circuit U is OFF is ON Since current flows at point 8 only when Ut transistor and transistor are ON the current waveform at point becomes intermittent waveform as shown in Fig 4 3 Since current at point is approximately proportional to the input current of the air conditioner input current is controlled by using DC current ld detection resistor lt Reference gt If power module is defected self diagnosis lamps on the MAIN P W B may indicate as shown below Table 4 1 POWER P W MAIN P W B Self diagnosis Self diagnosis lamp and mode Blinks 2 LD301 tins LD301 W lp peak current cut LD302 TAKK e LD303 2 Abnormal low speed rotation Blinks 3 LD301 times Switching incomplete 45 Blinks 4 times LD301 IPM drive circuit The inverter driving device IGBT and the drive
80. 100 5 TTI R209 5 M 8608 16 1 M R210 5 C M R609 6 1 M E R211 5 8610 6 M R404 3 8403 6223 R212 1 5 C M R611 6 t 1 213 5 C M R612 100K 596 It C M MU gt R214 5 1 15 M R613 0 J 1 En R215 5 c M 8615 6 M R216 5 vil C M 8616 6 0 5 M 29402 5 5 a R217 5 1 15 C M 8617 360 0 ss 1 2 A M T lt Is Pn Ge R218 10 5 8 C M 1 z 219 100 5 C M R701 1 2K 5 Al P EXPANSION S Posos eu ME o TACHOMETER R220 1M 596 C M 8705 7 5 P ONTS WHITE 0225 205 R221 1 vul C M R706 5 XA 6P sits R222 510 5 Vi C M R801 39 5 p Y 3 meneli N IO 8223 C M R802 39 5 P E S 1 SES PIN 8224 100 5 1 5 8803 5 5 4 R225 1K 5 ivul C M R804 P W Laroj OTP R226 c M ib dude R227 10 5 8901 10 5 stele R12 amely R228 10K 59 C M R902 10 5 N R225 O R229 5 M R903 10 5 ovovov R288 5 R230 10 506 M 2 231 5 C M R905 453 196 M ETEN a R232 5
81. 4 0 06825 M D801 188120 VS2 4508R 120 P c215 0 125 C C M VS3 4508R 120 P C216 0 0041750 3901 C217 22 10 D R M 0902 0140 HIM SAT RA 1020 C6 Y R P c218 0 tes cl D903 D NL40 ELE ICE ERE DaT SWITCH D912 M 62220 02225 c C M D913 M SYMBOL MODEL 223 0 0150 C C M TIE sw1 et ern 0916 M OSCILLATOR C226 0125 C C M SYMBOL MODEL Ele om 1105 6 v fee 1 C M LED C304 0 125 C C M Ze USE UN use 2 C401 10025 P JW001 UNUSE SYMBOL MODEL JW002 UNUSE 1030 1 estie Vest R M C501 470250 C M LD302 It Vs M 502 470 50 M JW004 USE 10303 1 20 W R M 503 470pls0 cl C M Jwoosl USE A P IC C504 JW006 USE mn C505 2 2 ie W SYWBOL RATING 5 STR L472 102 ULN2008ANS S M 103 BA10839F SIM 104 NNZSOAN TES C601 o 0008850 C C M ZENER DIODE 105 _ Nuw2go3v Te1 S M C602 0 0008850 C C M 106 M54532P C603 0 0006850 C M SYMBOL MODEL 107 s24c028FJ 18 s M 6604 0 0008850 C C M 2001 C605 0 00150 10 001 50 C M 6607 0 00150 sE012 C608 0 125 T 8 11 M C801 0 15 50 R P 70071 UDZS 208 IPM 55 1001 H C802 0 02250 F RI P 803 0 0115 C R P
82. A y UI 5 eui sy uonesedo dois uonng eui deeg uum dOLS sues dOLS LHVIS eu seid LHVLS suonipuoo uo Buipuedep enjejeduje woo jenjoe y pue eunjejeduiej 941 ey Aejdsip Wool eui 195 aan S y ye nok ing DU Se UDIUM ey 941 OLNV Q Dunes sareoipui Aejdsip q33dS 3 q3ads NV4 196 ola 9 ir ejdsip y yey os NOILONNA 94 5594 EE IHOVLIH JOOPINO BUI JO 2261 e oqe SIU esn eui jo deex eui 199101d 19PIO UI JOU eui 0212 19 0 SI 1 De LZ si
83. AVL AVL EVL AVL AVL ov SOA seule eui UO g pue y je Bulag AQEZ 0ZZOV SI jddns 1emod eAnoejeq OL SHUIIG LOE A 78 pepeeu ey eoejdeJ pue eoejigjul ueyoJq eq 109 4 8109 JN Jemod eui e ejdeu jddns jewod MS Jomod ON uedoud 199uu07 S9A SEY 10 spue ye ASEDA SI PUE NI 1290009 SIA NET NBIDA Adpueis ABE AZEOC 1 pue 2 1ndino Bureq ASEDA SI peroeuuoo pue END SOA yun ey 1ndjno Bureq AGE SI e qeo S SOK 2019 UOlESIUNWWOD S9WN 6 SAUIJA 0601 79 pue eui peaj pue usayyed JO au UI sued eoejdeu JOjsiuueu 94 eoejdeu JOISIUWIIDU eu 199UU0N ON ewou
84. B forward a little and remove it 63 Other Cautions 1 Cautions concerning ICP IC Protector 1 Use due caution for short circuit in servicing Short circuit will open the ICP immediately 2 When the ICP opens remove the cause of this phenomenon and replace the ICP If the remedy is improper the ICP may open again 35V line ICP2 Indoor unit fan motor 12V Power circuit gt 12V line ICP1 5V 5 line Power circuit ZD121 20V Zener Diode OV 2 The CN3 power supply and CN10 fan motor are the connectors with lock mechanism Press the lock with your fingers to unlock and remove the connector Press here Lock 3 When checking the voltage and waveform do not connect the probes to the forbidden areas show below Touching them may cause the ICP1 blowout and Q111 failure OK foi N ICP1 35 V line 5 m G S Source D Drain G Gate Forbidden area Gate G to 0 V Forbidden area T The Q111 MOS FET and its gate terminal is a high impedance When a probe such as multimeter is contacted with the gate the 0111 may have the continuous ON state to supply overcurrent in the circuit causing the ICP1 blowout and Q111 failure When checking the switching waveform of the Q111 set the source 5 to the base and measure the gate and drain 0 4 During power fe
85. C R507 59 1 c 3596 05 c Reto 5 lim os c C 222 081001211 50 01 Symbol etel Mots Model L761 100800 025 R126 5 029 c 8508 10K 596 1 1 030 R631 1K 5 1 012 Rati 5 035 car 1 1 TT 2 c651 0 1 257 C 045 Seer Jumper RES 1 1651151010653 107 R Symbol ME 1762 16080 025 M H R127 5 1K 5 040 c 8509 10K 5 1 1 030 8641 10 55 030 c 88177 39 55 vel 013 C711 o 1u 28V C 045 Circuit s Use Buzzer SW EVQPO7K SW 132 H 1763 1608c 1025 CN 15 PH 5P Top BL 124 H Rial 51 55 t a 020 c R510 5 030 R642 1 5 17161 033 R813 39 59 1 81 013 C c712 0 tu 28V C 045 Symbol Don t Use 5 part s 5 N L764 160800 025 R141 2 7K 5 015 c 8511 10K 5 1 1ew 030 8651 1 5 17161 033 5 6713 0 11 25 C 045 c Use je fiits Mode R512 10K 596 1 16W 030 c 100k 25 t 42 1 R amp 21 4596 il 033 c 47H 069 IR 751 JWe0t Use 11 bu d Zener Diode L801 1004 111 0212 os BZ E R513 596 030 R653 1 5 1 1sw 033 822 196 017 C caot 150P s0V C 048 JW801 1608
86. C 35YH5 The marked parts very important ones for safety INDOOR UNIT SINGLE PHASE AC220 230V 50 HZ POWER TERMINAL CONNECTING SWITCH N AX BOARD CORD 22212 P 2 BROWN 0 BLACK ______8 BLUE 2 1 WHITE LINE GREEN amp YELLOW THERMAL FUSE 1020 E BROWN m oe tS REDE CN8 CN3 HEAT Si EXCHANGER BRAY CONTROL IN THERMISTOR WB 4 AUTO SWEEP 1 2 MOTOR ROOM TEMP CN 1 THERMISTOR M 2 1125 LA ONT ELA NDOOR 123456789101 1 2 3 4 BLUE EAN MOTOR N C1C2M1M2 WIRELESS REMOTE CONTROL OUTDOOR UNIT COMPRESSOR BLU BLUE ORN ORANGE RED RED BRN BROWN WHT WHITE GRN GREEN YELLOW WHTIYE URED GRY GRAY PUR PURPLE CN OUTDOOR ulv lw NAS FAN MOTOR 1 FUSE 1 M A L W 083 DIODE STACK OVERHEAT THERMISTOR 982 A H WTI En MAIN P W Bf DEFROST THERMIS
87. CUT OFF THE ONCE 2 WAI 3 PRESS WHICH SERV STAR 105 THE 5 THAN TO RE CUT ON AG IN OR OF CO MORE T 5 MINUTES WITH SERVICE VALVE CLOSE CEOPERATION AGAIN AT LEAST I 0 SECOND E OPERATION WILL BE D HIS OPERATION RVICE SWITCH AGAIN SECOND gt P p RE OF REFRIGERANT PUMP DENT OPERATION POWER SOURCE THE SERVICE SWITCH THE PWB MORE PRESS MORE UME TO NORMAL OPERATION E POWER SOUCE ONCE THEN TO PROTECT THE DAMAGE ESSOR DO NOT OPERATE yu 2 2 HII HEEEL DETAILS JIN CHECK POINT 1 DURING OPERATION 10303 LIGHTS NORMAL COMPRESSOR OPERATION OPERATION NOT MALPUNGTEON oen 5 D 2 0 8 3 s m THIS SHOWS AN OVERLOAD Tue Rotation speen 18 VERLOAD PROTECTION 2 AUTOMATICALLY CONT STATUS ROLLED TO PROTECT THE COMPRESSOR IN THE NOT MALFUNCTION OVERLOAD CONDITION 2 DURING STOP 10303 RED GOES OFF NORMAL STOPPED BY THERMOSTAT STOP Pa CONTROLLER NOT MALFUNCTION aln MICROPROCESSOR WAS 4 LJ RESET REBOOTED 17 15 NORMAL OPOWER W B STOP WHEN POWER SW HAS BEEN OMAIN W B 1 TURNED ON PEAK COMPRESSOR PEAK OMAIN
88. ESHOOTING WHEN TIMER LAMP BLINKS Model RAS 25FH5 RAS 35FH5 Perform troubleshooting according to the number of times the indoor timer lamp and outdoor LD301 blink SELF DIAGNOSIS LIGHTING MODE Model RAS 25FH5 RAS 35FH5 X1 No Blinking of Timer lamp Reason for indication Possible cause Reversing valve defective 1 R eversing valve defective j L 2 Heat exchanger thermistor 2 n disconnected 1 time heating mode or it is too high in the only in the heating mode cooling mode Note The malfunction mode is entered the 3rd time this abnormal indication appears read every 3 minutes Outdoor unit is under forced Electrical parts in the outdoor unit 2 gt N operation EID 2 times When the outdoor unit is in forced operation or balancing operation after forced operation N Indoor outdoor interface defective 1 Indoor interface circuit 3 200 3 times When the interface signal from the 2 Outdoor interface circuit outdoor unit is interrupted Outdoor unit electrical components Outdoor unit electrical components defective For details operate again using When the same error mode is detected remote comtroller and check from 8 times within 30 minutes from outdoor self diagnosis display of outdoor 4 BEE ES 4 times unit electrical components unit However when error is detected 8 times within two hou
89. FICATIONS MODEL RAS 25FH5 RAS 35FH5 RAC 25YH5 RAC 35YH5 FAN MOTOR PWM DC35V 40 W FAN MOTOR CAPACITOR NO NO FAN MOTOR PROTECTOR NO NO COMPRESSOR EU1011DF COMPRESSOR MOTOR CAPACITOR NO OVERLOAD PROTECTOR OVERHEAT PROTECTOR FUSE for MICROPROCESSOR POWER RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH TRANSFORMER VARISTOR NOISE SUPPRESSOR THERMOSTAT REMOTE CONTROL SWITCH LIQUID CRYSTAL NO REFRIGERANT CHARGING UNIT 870g VOLUME Refrigerant 410A PIPES MAX 20m WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE g egueijdde eui zou op yey eansue pasiAjadns eq Ajayes eoueijdde siy esn ued Ay yeu uosJed e qisuodsai Aq 5 Ajayenbape HONOLLNOA jjnsoJ Kew suing amp pue edid 104 ueeq eneu ABUI ssejun suosJed 10 Ag esn 104 zou unu 196 yun Joopino JO pue apno our JOU _ 01922 voos jenue1od dup eui 10 sued onsejd eui u
90. HITACHI RAS 25FH5 RAC 25YH5 RAS 35FH5 RAC 35YH5 REFER TO THE FOUNDATION MANUAL SERVICE MANUAL TECHNICAL INFORMATION FOR SERVICE PERSONNEL ONLY CONTENTS SPECIFICATIONS evs ese ee eee ASS 4 HOWTO USE egen eee 5 CONSTRUCTION AND DIMENSIONAL DIAGRAM 15 MAIN PARTS COMPONENT eenen 17 WIRING DIAEA eeens 19 RAS 25FH5 CIRCUIT DIAGRAM ee 20 RAS 35FH5 BLOCK DIAGRAM cente ette 22 BASIC MODE etn 23 REFRIGERATING CYCLE DIAGRAM 29 DESCRIPTION OF MAIN CIRCUIT OPERATION 30 SERVICE ONG 58 TROUBLE SHOOTING ereen 61 PROCEDURE FOR DISASSEMBLY AND REASSEMBLY 87 PARTS LIST AND DIAGRAM netten 89 RAC 25YH5 RAC 35YH5 SPECIFICATIONS DC INVERTER WALL TYPE INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT MODEL RAS 25FH5 RAC 25YH5 RAS 35FH5 RAC 35YH5 POWER SOURCE 1 PHASE 50 Hz 220 230V 1 PHASE 50 Hz 220 230V TOTAL INPUT W 580 155 1 080 980 155 1 300 TOTAL AMPERES 3 11 2 97 4 69 4 49 kW 2 50 0 90 3 10 3 50 0 90 4 00 B T U h 8 530 3 070 10 575 11 942 3 070 13 650 TOTAL INPUT W 790 115 1 120 1010 115 1 300 TOTAL AMPERES 3 99 3 82 4 84 4 63 kW 3 40 0 90 4 40 4 20 0 90 5 00 B T U h 11 601 3 070 15 695 14 331 3 070 17 745 780 750 91 780 750 91 28
91. L RAC 25YH5 RAC 35YH5 OUTDOOR UNIT 26 Unit mm Air Suction gril 10 Of 8 2 ES Notch for anchor bolt for 2 98 0 bolt Drain hole 12 Fixing hole 35 He Drain hole 500 125 T Service space 2 3 588 ss More than 100 200 gt 2 oc v 55 750 S 841 16 2 912 x 6 slots for 08 0 bolt 27 5 288 19 5 N 5 Handle 00 40 ES 10 10 5 sl 8 Air outlet 202 10 Rear side Air suction 50 Holes for anchor bolt MAIN PARTS COMPONENT THERMOSTAT Thermostat Specifications MODEL RAS 25FH5 RAS 35FH5 THERMOSTAT MODEL IC OPERATION MODE COOL HEAT IN DICATION 16 7 62 1 18 7 65 7 16 16 0 60 8 19 3 66 7 TEMPERATURE F IN DICATION 24 7 76 5 26 7 80 1 24 0 FAN MOTOR Fan Motor Specifications MODEL INDICATION 32 7 90 9 34 7 94 5
92. N MOTOR Ku ERROR NOT ROTATE 8 INTENDED OFAN MOTOR CIRCUIT m EEPROM MICROCOMPUTER CANNOT ZL READ READ THE DATA IN EEPROM OMAIN P B 13TIMES ERROR NEXAMPLE OF TITRES BLINKING 5 TIMES OF 0 25 SEC IPM 3 0 0 INTELLIGENT m e POWER MODULE o B 0 IN 5 E B 5 o 8 H au ES LD301 SELF DIAGNOSIS LAMPS 10302 TT SERVICE SWITCH 67 OUTDOOR UNIT Remove the compressor connector 1 2 IPM Intelligent Power Module 3 Service Switch 4 Self Diagnosis Lamp
93. N for auto sweep 2 25 az gt 2 i e oy BZ 2 ee Buzzer O O C802 R812 8522 Jwaoil 10804 a ss 20 L N E j ja ja j je al ov A y AAN OV OV 4 53 52 RO E 53 8 58 d OV R654 CNT ERNI CHEN Ait 35V NV 2P Top 2Wa Valve Coil 2 5 2 22 Soot iu x 6 m S S TUT dd 18502 AUTO R731 2 Heat exchanger EE EIS ENE AUTO RESTART ol EST X T Thermistor CNS Kn gt OUTSIDE THD ud arm NII T 254 307 4x2 OUTSIDE and 5 6 Miss 2857 8642 t PH 2P Top E 1 FILTER RESET 44 0v CN15 XHaving plani R306 C505 R50 PH 5P Top BLK eh Use CURRENT SELECT 5 143 amp 555 I REMOTE CONTROL ID 44 S V SDASCLRES OV Display P esoso STG C524 19 O 2 50 N 10501 i R503 R511 J 1 RY Qvss 7 13 POWERFUL YT 5V 6 Care sels rj Yf PH 11P Top 4 Rini REVIT eld RXT SED 9513 SV Dr errs 0v Terminal for EEPROM lc WIRELESS INPUT e peer su TIG eo am m 651 CZ 12P Top data MEE ay Exchng O Vie EDO BE Ms 1 0141
94. P2 cCP2E 50 2 104 C ou Mods MAN E R521 5 1 18 030 8732 10K 5 1 16 8830 __ 1 5 1 6 006 J 0 ao 1 1 e 14587 127 20 MOUNTING BOARD
95. PACITOR TYPE POWER CERAMIC 15A FUSE 1 B PNE W 0 ELECTROLYTIC 5 E SAI 1001 T 77 ROOT RL2 34 se OT E e 22 M TEN i 0 7 0 RESISTORS RESISTORS e gt 33 8 REATING REATING en 1 pa KA par MO FADE TIETEN SYMBOL S 2 Meri RED g N 5 5 1 4 A P R248 2K GREEN ih RO2 33 5 1 R249 20K 1 li C M C009 el 0001 R005 gt ABO 1 9 TA a m PURPLE ROS 680 5 1 4 A P R250 2 RO4 0 68 5 1W R P R251 5 M GREENS mM m woz W ov ORANGE i ROS 2 2k 5 1 4 Al P R252 5 1 5 t C M 5 1003 1002 5 TABO2 m I m 8 RO 47 2 1 4 a P R254 100 5 i TI HI 5 8255 2 5 4 um Fr T Md 1 1 TM ibt 1 1 RIO R256 5 _ e 10101 gute 1 1 R11 iK 1 Al P R257 5 8 zz 4 2 R107 0924 6 R258 5 TT T a R13 390 5 1 4 A P 8259 8 25K 1 M 0008 C018 6 C102 R260 1 6 4 OH sy R102 9 4 1000000 R15 331 17 A P R261 1 viel C M CN24 mit E R262 1 aS 2 c91 1 I R20 2 2k 5 1 4 A P R263 1K Sw tt C M SW TRANS 85 15 0V 45V 69416840 cin R264 5 1K 5 M t Dg oma Lagos R23 P R265 5 5 ue ike R24 P
96. R287 0208 12V 5V 1 68 Reset output R284 1 ale 1 1 8 8 cio V 8 Reset Main P W B ov Fig 6 2 1 IS OVL Current transformer CT1 reads the input flowing current and detected to the microcomputer as a voltage signal Receiving this the microcomputer converts it to a digital signal and compares it with the internal data to judge whether or not overload control is required Fig 6 3 shows the rotation speed control When the voltage at pin 6 of the microcomputer exceeds the set value the microcomputer decreases the rotation speed of the compressor and reduces the load Voltage at microcomputer pin e om cpm Rotation speed of compressor Command rotation speed Actual rotation speed Decelerating Accelerating Decelerating Accelerating gt lt gt lt gt lt Fig 6 3 2 ID OVL Fig 6 2 The filter consisting of R245 and C217 removes high harmonic freguencies from the voltage generated by the current flowing to Detection resistor R245 and C217 average the voltage This voltage is then input to IC4 pin 5 and supplied to microcomputer pin 60 The microcomputer compares this input with the set value and if the input exceeds the set value it enters overload control status The set Value is determined by the amplification of the voltage amp circuit Amplification high gt DC current low Amplification low gt DC current hig
97. TIN Indoor fan E m m M nr 15580 15 sec Horizontal air Shut Outdoor fan m deflector Horizontal Reversing valve Facing down Cooling on model Compressor speed STARCP Notes The sleep operation starts when the sleep button is pressed When the sleep button is set the maximum compressor speed is limited to CBEMAX and the indoor fan is set to sleep Lo The indoor fan speed does not change even when the fan speed mode is changed If sleep operation is canceled by the cancel button or sleep button all data is cleared rotation speed Compressor The operation is done assuming as the preset temperature room temperature at the time 2 C 2 The indoor fan is operated in the Lo mode During thermo OFF indoor fan will be OFF for 5 minutes and ON for 1 minute When the operation is started by the themostat turning ON the start of the indoor fan is delayed 32 seconds after the start of compressor operation The compressor is operated forcedly for 3 minutes after operation is started The minimum ON time and OFF time of the compressor are 3 minutes Dehumidifying Sleep Operation Cooling Defrost 1hr Indoor heat exchange temperature Sento m Sleep button TEIOF Operation lamp Timer lamp TEION Remote control Sleep ON
98. TOR N TAB ENS m GRY ABA TABI OUTDOOR TEM I ery THERMISTOR SIE 3 RED BI IE fr 11 BN E CN3B CN4B n S 3154uFX2 R SMOOTHING CAPACITOR A ged RELAY e US MH POWER POWER P RELAY ewe VS2 8002 0012 C013 3t 6008 C003 ETE 0 o SWITCHING M SUPPLY tar STACK SN a xREVERSING VALVE iis Loori 0087 CN m RED Try BLK ERN RED TERMINAL BOARD LL oA No B C D BOARD N GRN YEL BLK BRN RED INDOOR INDOOR UNIT UNIT 19 CIRCUIT DIAGRAM MODEL RAS 25FH5 RAS 35FH5
99. a signal while it is outputting a reguest signal The receiving circuit in the indoor unit consists of a comparator and transistor The interface signal from the outdoor unit on the DC 35V line is supplied to C821 where DC components are eliminated and is then shaped by the comparator The shaped signal is detected by diode amplified by amp and output to pin 49 of the indoor microcomputer Fig 3 2 shows the waveforms at each component when data is transferred from the outdoor microcomputer to the indoor microcomputer 3 2 Communication signal from indoor microcomputer to outdoor microcomputer The request signal SDO generates by indoor microcomputer is output to pin 6 and amplifies by 0801 I F signal approx 38 kHz is generated by comparator then modulated by the signal from pin 60 of indoor microprocessor This modulated I F signal is then amplified and superimposed to DC 35V line via L801 and C802 of indoor interface circuit Fig 3 3 shows the waveforms at each component when data is transferred from outdoor microcomputer to indoor microcomputer The circuit operation of the outdoor receiving circuit is same as indoor receiving circuit 38 Fig 3 1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other Control P W B 49 I F RECEPTION
100. ay be caused by faulty DC fan motor In this case please check CN6 and CN12 connection first It makes Fan Motor Lock also if those connectors are in misconnection DC Fan Motor has broken invites 1A Fuse burned Please replace both DC Fan Motor and 1A Fuse together It will makes Fan Lock Stop when something has disturb the Fan rotation by inserting materials into propeller fan or ice has growing inside of outdoor unit by snowing It may make Fan Lock Stop by strong wind ex 17m sec or above against the Fan rotation In this case unit will be restart again after a while In case of Fan Lock Stop even though the DC Fan Motor is rotating correctly the possible cause in Fan Motor problem or control board problem Stop after the Fan motor runs 2 minutes Fan Motor may be broken lt Caution gt Please take care for the electrical shock by high voltage of DC Fan Motor power source which is common with compressor when you are servicing this unit You can not confirm the coil and wiring of Motor directly due to the built in control circuit in Fan Motor 57 SERVIGE CALL Q amp A Model RAS 25FH5 RAC 25YH5 RAS 35FH5 RAC 35YH5 COOLING MODE The compressor has stopped suddenly during cooling operation Fan speed is not switched over during dehumidifying operation Cool air comes from the unit during dehumidifying operation The circulation stops occasionally during Heating mode When the fan speed
101. circuit are built in the IPM The IPM receives the signal from the microcomputer and convert it to O 15 V signal to drive the IGBT When the unit operates at low speed a chopper signal is emitted from the micro computer as shown in Fig 4 6 0 to 5 V The signal is converted to 0 15 V at inside the IPM and transmitted to the gate of the transistor IGBT in each phase to drive the IGBT When abnormal peak current was detected while the inverter is driving the IPM outputs the Fail signal immediately from the pin 69 and forces the lower arm transistor to shut off at the same time In this step the Q501 is turned on and the input signal of the upper arm is also shut off through the D501 and D502 so that all signals to the IGBT are shut off This signal is also distributed to microcomputer pin 7 as a Lo signal to stop the drive signal and blink the self diagnosis lamp as two time When the peak current is detected the IPM keeps the lower arm off for about 4mS and the drive signal into stand by state 3 minutes after this state the micro computer outputs the drive signal and restarts the operation E 120 gt lt 120 gt lt 120 gt lt 120 gt 120 V Ut vt U V U WwW vr U 5V vt OV Drive signal at point Drive signal at point D Fig 4 6 46 5 Power Circuit for P W B Fig 5 1 shows the power circuit for PW B
102. d judgement values There are two types of control which has named IS OVL and ID OVL 15 OVL is limiting the whole input of this room air conditioner system through the current sensor CT1 in order to keep the maximum rating of components by reading total operating current ID OVL is watching and limits the compressor current through the detection resistor which is built in IPM in order to control the compressor reliability Since the compressor reliability is related with its speed the ID OVL value is also linked with the compressor speed Fig 6 2 shows an ID OVL limitation curve All of OVL operation values were programmed into EEPROM memory Compressor 4 Microcomputer EEPROM Motor current ID v A D Detection converter resistor Y Y Motor Amplifier control process Smoother A D A converter Detection transformer CT1 yp Whole current IS Fig 6 1 Overload Control System 49 IPM Detection pec t i NL Resistor Direct Current 6 pog 0501 R513 Power PWB L n R906 ree if i me 8004 Microcomputer 9 1 1 5V N S in 9 TN 0 Oye 5V ov ov ov v 5 5 CN4B CN4A R222 a gt 7 4 ot Gis ov 999 0001 005 NT o o N AT ov 8 5 1 ov Ov ov ov
103. ed 10 e Buisn juabe sejes INOA yjnsuog Ajuo jauuosiad pezuouine Aq pawlojusd eq jeroedse 5141 eq eJnjeJeduie WOO 1esaJd y 249 pue sjuewdinbe wood ejdoed Aujigedeo Buneeu eui e oqe WOO ay 1299 JO JUNOLUE JU BWIN 10 uonipuoo YONS Jepun Jou op enun INOA JOM JIM SIU umop Houd sdiip pue 10109jJap y uo esuepuoo JIM own jo poued e 10 Ajeo O fulde y pue 08 e oqe SI woos eui pue 100p y ui HUN eui uauM uo sjoefgo 1nd 10 100pino uo JOU sjewiue JO Sjue d ey S se ou Jepun sjewiue 10 eoejd jou oq Yooys esneo pue eq jeouioe 3 pun ey UO SLA se 19 EM JO HUN BUI usew JOU oq
104. ed operation Multi bit 1010 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 11 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1010 Compressor minimum rotation speed 4 MSB Compressor minimum rotation speed 3 Compressor minimum rotation speed 1 Compressor minimum rotation speed 2 Compressor minimum rotation speed 0 LSB OVL up 15 20 Compressor command Compressor command Compressor command Compressor command Compressor command Compressor command Compressor command Compressor command Compressor ON Reversing valve 2 way valve Fan 2 MSB Fan 1 Fan 0 LSB Capacity code 3 MSB Capacity 2 Capacity 1 Capacity 0 LSB Indoor in operation bit Operation mode 2 MSB Operation mode 1 Operation mode 0 LSB 1 0 1 0 1 0 1 0 O O O O 1 0 1 0 1 0 O 1 0 O O 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 Character No Contents 42 2 Indoor message 2 2 v O Contents 4 IPM Intelligent Power Module Fig 4 1 shows the intelligent power module and its peripheral circuit The three transistors on the positive side are called the upper arm and the three transistors on the negative O side the lower arm DC VOLTAGE R004 R003 1d DETECTIVE
105. eding to the P W B do not remove and insert the CN10 fan motor connector Failure to do so may cause overcurrent to the fan motor and P W B s micro computer IC and the like and a failure may occur To remove or insert the CN10 be sure to shut off the power 64 THE SUPPORT FUNCTION OF FAILURE DIAGNOSIS No Function Name Description Self diagnosis indication function lt lndicating a failure on the indoor unit side gt lt Indicating a failure on the outdoor unit side gt The timer lamp indicates a mode of failure detected on the indoor or outdoor unit side by blinking freguency A failure detected on the outdoor unit side will be indicated by the timer lamp blinking 4 times after a retry operation has been performed several times Note In some failure modes only the retry operation is repeated without lamp indication lt Failure modes that will repeat a retry operation without the indoor unit lamp indication are as follows gt OH thermistor temperature rise Outdoor unit communication error Power voltage abnormal Less frequent defects 1 0301 indicates a mode of failure detected on the outdoor unit side by blinking frequency Upon failure detection the outdoor unit will shut down and the LD301 continues to blink until the unit is reset In the event of communication errors the LD301 continues to blink until communication is restored 65 TROUBL
106. eui jo euoudejei jo 9 JO sedid sef 10 BUI eoejd jou oq eu osn eseeld DNINHYM HOSINOA Ag eui EISUI NOA 11990 Kew 40 HOUS Jore M yun Jno jo UONEJ EISUI eui 10 10 sajes INOA eseeld NOILISIHOHA O Aq HUN ay NOA 11990 10 1404 iun 3onasuooei jou oq SNOILQVO3Hd Buipee Jaye siy day eq 4 ey eui i UoniqiuoJd sayeoipul ur U IS siu 9 subis jo sejdurexe eu Mayes eunsue oj Apalus suononursul e esee g JOU ji seouenbesuoo UI Kew YDIUM surejuoo uonoes UONNEN eu snoues 10 esneo Apos 100 Surejuoo 941 W pue W jo subis jeroeds pun ey jo oj jun
107. h Fig 6 4 shows the rotation speed control When the voltage at pin 60 of the microcomputer exceeds the set value the microcomputer decreases the rotation speed of the compressor and reduces the load Judgment value according to rotation speed internal judgment value DC current Rotation speed Fig 6 4 50 R003 R004 R608 R613 detect the DC voltage at the power circuit The microcomputer receives DC voltage and applies correction to the overload set value so the DC current will be low when the DC voltage is high Since the load level is indicated by the DC voltage multiplied by DC current R247 R248 R249 are provided to perform the same overload judgement even when the voltage varies DC voltage Low DC current High DC voltage 260V DC voltage High DC current Low DC current 0 Rotation speed Fig 6 5 3 Start current control It is required to maintain the start current DC current constant to smooth the start of the DC motor of the compressor RAC 25YH5 RAC 35YH5 uses software to control the start current The start current varies when the supply voltage varies This control method copes with variations in the voltages as follows 1 Turns on the power module s Ut and V transistors so the current flows to the motor windings as shown in Fig 6 6 2 Varies the turn ON time of the U transistor according to the DC voltage level and the start is controlled so the start current is appr
108. i oq e Bumywsuen JOU SI Y J SINIOd 9NIMOTIOH JHL 3423HO SINIOd ANIMO TIOd JHL 393HO 39IAH3S HOS ONDISV N3HM eui Asen Buneeu eui 6umes MOT 9ui sun y MOT amp WM si Bullies OLNY JO esn payeay si Wood y Jaye uogeJedo 10 peeds IH amp eui Bunesy Buunp 99 10 OU 10 02 Buneeu Buung SOINUIW AjaIewixoidde 10 ayesado jou eui YEU OS YUOM eui 19 SI eui 555 eui BuISSOId 33935 53775 HILAV iji pue Q UI HO jo pue 5 310j9g 19 041u09 195 4 WOOL 1 00 4 uesui pue Bnjd y 19mod y uo s YIP 10 15 JO
109. icrocomputer always reads the outdoor temperature via a thermistor microcomputer pin 64 an transfers it to the indoor unit thus controlling the compressor rotation speed according to the value set at the EEPROM in the indoor unit and switching the operation status outdoor fan on off etc in the dehumidifying mode The following shows the typical values of outdoor temperature in relation to the voltage Table 7 1 Outdoor temperature C 10 0 10 20 30 40 R303 Voltage V 1 19 1 69 2 23 2 75 3 22 3 62 lt Reference gt When the thermistor is open in open status or is disconnected microcomputer pins 62 64 are approx OV when the thermistor is shorted they are approx 5 V and LD301 blinks seven times However an error is detected only when the OH thermistor is shorted in such a case the blinking mode is entered 12 minutes after the compressor starts operation 53 8 Reversing valve control circuit C 35V 4 Power P W B MAIN PWB Reversing N valve CN2 ri 1 R 0701 ES Paor NL CN4B CN4A Microcomputer 1 OO TS DC voltmeter V or multimeter Fig 8 1 Reversing valve control circuit will switch reversing valve ON OFF cooling ON according to instruction from indoor microcomputer depending on the operation condition shows in Table 8 1 Voltage at Q701 between C
110. ing otherwise the components may be damaged The failures of the loads are as follows Failed Possible causes Criterion output 35V Reversed connection of the cable Connect the cable correctly Electrical part for the indoor unit has Remove the connection cable and measure the a failure voltage If the voltage is correct check the electrical parts for the indoor unit Short circuited reversing valve Remove the CN2 and measure the voltage If the voltage is correct check the reversing valve 15V DC fan motor error Remove the CN24 and measure the voltage connect the CN3 If the voltage is correct check the DC fan motor Also check the main P W B 1 A fuse for blow out in this step Main P W B error Remove the CN3 and CN4 and meaure the voltage If the voltage is correct check the main P W B 12V 5V Main P W B error Remove the CN3 and CN4 and meaure the voltage If the voltage is correct check the main P W B 48 6 Microcpomputer s Peripheral Circuits 6 1 Overload control circuit OVL control circuit Overload control is to decrease the speed of the compressor and reduce the load when the load on the air conditioner increases to an overload state in order to protect the compressor electronic components and power breaker Overloads are judged by comparing the DC current level and set value Fig 6 1 shows the overload control system configuration and Fig 6 4 is a characteristic diagram on overloa
111. ing power circuit supplies power to electronic circuits on the main P W B through CN3 x When replacing any P W B disconnect all the cables including ground wires A Main P W B 1 Remove four screws securing the control 2 Open the support latches and raise P W B to the cooling fins and remove the the main P W B in the direction of control P W B from the cooling fins the arrow as shown in Fig A lt Direction of the main P W B removal gt B Power P W B 1 Open the support latches and raise the 0 n power P W B in the direction of the arrow as p het shown in Fig A X Direction of the power P W B removal 1 IOO om ens AM 8 Open these support latches to remove the main P W B Fig A 74 C Power Factor Improvement capacitor Designed to improve power factor To replace the capacitor remove the power P W B and then 1 Remove two screws fastening the capacitor seat 2 Slide the capacitor seat in the direction of the arrow Sliding Direction 75 dure sisouDelp jjes eui pip apow sisouDeip jjes y 995 400pino eu y UI HUN eui oje1edo pejoeuuoo g 0 pue eui eAnoojep aq osje
112. ing the power circuit Check the wireless light receiving unit Check the reset circuit and repair any defective section Replace the microcomputer and oscillator Perform final operation check X1 When not in operation the unit will enter into a low power standby state possibly causing a voltage drop to the 12V and 35V lines as shown below 25V 20V 12V 7V 70 2 Indoor fan does not operate others are normal Can the fan be stopped by remote control No Yes Yes The microcomputer fan PWM output at pin 62 is 1 5V Replace the microcomputer No Replace the fan motor Replace the microcomputer Perform final operation check 3 Air deflector does not move others are normal No Are pulse signals output at microcomputer pins 5 08 when auto swing is turned on in the fan mode Yes Is a voltage over 15 or below 10V Yes being generated on the 12V line Replace IC111 Check IC711 If it is normal Replace the microcomputer replace the air deflector motor Perform final operation check 71 4 Check the control P W B power circuit Is 35V or 20V being output Check to see if the connection cables are
113. is set at HIGH or MED the flow is actually Weak Heating operation stops while the temperature is preset at 30 When Auto fan mode is set the indoor fan speed changes from HIGH through MED to LOW Check if the indoor heat If the air conditioner operates exchanger is frosted in cooling mode when it is Wait for 3 4 minutes cold the evaporator may get until it is defrosted frosted Fans speed is normally set to LOW during dehumidifying operation To have an operation with high dehumidifying effect the unit operates at low fan speed As a result cool air comes from the unit This phenomenon is not a fault It occurs during defrost ing Wait for 5 10 minutes until the condenser is defrosted At the beginning of heating the fan speed remains LOW for 30 seconds If HIGH is selected it switches to LOW and again to MED after additional 30 seconds If temperature is high in the outdoor heating operation may stop to protect internal devices In the fan Auto mode the unit detects the heat exchange temperature When the temperature becomes low the fan speed changes from HIGH through MED to LOW This is not an error The anti cool air function shows this phenomenon 58 AUTO FRESH DEFROSTING After the ON OFF button is pressed Auto Fresh Defrosting is carried out the to stop heating the outdoor unit is system checks the outdoor heat exchanger still working with the OPERATION and defrosts
114. it as shown in Fig 1 1 Main P W B This P W B is equipped with the rectification diode DC fan motor control circuit and the circuits around the micro computer which take various controls POWER P W B This P W B is equipped with the noise filter ICP power circuit interface circuit smoothing capacitor expansion valve control circuit and four way valve control circuit HARMONICS IMPROVEMENT CIRCUIT This circuit is composed of the capacitor at the bottom of the electrical parts box and two reactors attached to the BULKHEAD N F FILTER ICP CIRCUIT POWER P W B MAIN P W B RECTIFIER COMPRESSOR HARMONICS IMPROVEMENT INTERFACE CIRCUIT REVERSING VALVE CONTROL CIRCUIT SWITCHING POWER SUPPLY ELECTRIC EXPANSION VALVE CONTROL CIRCUIT CIRCUIT SMOOTHING CAPACITOR INVERTER CIRCUIT UIT CIRCUIT lt POSSITON DETECTIVE CIRCUIT THERMISTOR lt DETECTION CIRCUIT Fig 1 1 35 2 Power circuit This circuit is to convert the power from AC which is provided from the terminal A and B to DC voltage And produces an AC current which does not exceed the harmonic amplitude limit of the IEC61000 3 2 When the compressor is stopped the AC voltage becomes about 300 V and while the compressor operates it is abo
115. lic things away from the cabinet When using an oscilloscope never ground it Don t forget that high voltage as noted in the figure above may apply to the oscilloscope N 61 DANGER Donit install the ground line DISCHARGE PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT Caution Voltage of about 350 V is charged between the terminal of smoothing capacitors 400uF x 2 During continuity check for each circuit part of the outdoor unit be sure to discharge the smoothing capacitors Discharge Procedure 1 Turn off the power of the indoor unit or pull out the power supply plug 2 After power is turned off wait for 10 minutes or more Then remove electrical parts cover and apply soldering iron of 30 to 75 W for 15 seconds or more to TAB3 GRAY and TAB4 RED terminals on the main P W B as shown in the figure below in order to discharge voltage in smoothing capacitor Do not use a soldering iron with transformer Otherwise thermal fuse inside transformer will be blown LEAD WIRE E IN du 9 E N 10 PAN Oe ghi OO
116. mbining the 11 and 12 the input current from the main power shapes a waveform shown in the right side of Fig 2 3 indicating that the waveform is similar to sine wave The more the waveform is similar to the sine wave the lower the harmonic current becomes If the C023 has any failure the protection unit activates and the C023 in open mode In such a case replace the failed parts DB3 L1 Is 1 EE 36 3 021 022 This smoothes the voltage rectified for operating the compressor When the input voltage is taken for the sine wave as shown in the top of Fig 2 4 it is rectified by the DB2 and becomes the waveform as shown in the middle of Fig 2 4 After that the voltage is smoothed by the C021 and C022 and becomes the waveform shown in the bottom of Fig 2 4 DB1 and C41 The DB1 rectifies the input voltage and the C41 smoothes it for the control power supply If the units above have any failure the control power supply won t operate In such a case replace the power P W B 38 58 QE Aue 95 gt n OV 001 to C003 C011 L101 and L102 They absorb electrical noise generated during Fig 2 4 operation of compressor and also absorb external noise entering from power line to protect electronic parts Be sure to connect the earth cable between the indoor unit and the outdoor unit Otherwise the noise filter circuit won t operate properly SA1 and VS1 to VS3 These
117. me will be revised to 20 minutes And iv indoor fan is set to Lo and Med fan mode and v change operation mode During Cool Dashed operation thermo off temperature is set temperature with shift value 3 C After thermo off operation continue in Fuzzy control mode Compressor minimum ON time and OFF time is 3 minutes During normal cooling mode compressor maximum speed CMAX will maintain for 60 minutes if indoor temperature is lower than CLM XTP No time constrain if indoor temperature is higher than CLMXTP When fan speed setting on remote control is Hi or Auto mode and both room and outdoor temperatures data based on out door unit meet temperature judgment Off shown in the table 1 the compressor speed will be limited to CKYMAX When fan is set to Med compressor speed will be limited to CUKMAX When fan is set to Lo compressor speed will be limited to CBEMAX During Cool Dashed when room temperature reaches set temperature 1 compressor speed is actual speed x DWNRATEC 25 Cooling Sleep Operation Dehumidifying Operation Room temperature ihr Set to 7 hours Cooling preset Sleep button temperaure Operation lamp Timer lamp Remote control Sleep ON Hi Med See basic Indoor fan operation Start Stop button lo Operation lamp Sleep Lo 7 2 Thermostat judgement 5 min OFF 1 min ON Outdoor fan ITU
118. n when the Set to ultra Lo Lo or stop depending on the room temperature and time Set to stop if room temperature Basic operation of temperature controller Performs only fan operation at the set speed regardless of the room temperature starstop button Operation lam Hi 88 Med o Lo Hi Med Lo Enters sleep operation after set as on the left Action during sleep operation Lo sleep operation Sleep operation with sleep button ON See page 25 Same as at left See page 26 compressor stops See page 26 Same as at left See page 26 the room temperature is 18 C in the ultra Lo mode other than during preseating cooling is recovered at 18 33 C The fan speed is controlled by the heat exchanger temperature the overload control is executed as in the following diagram Heat exchanger temperature KAFON KAFOF Med with overload Lo See page 27 Same as at left See page 28 a Conditions for judgment any of the followings The mode is reviewed at every interval time When auto operation is started again before 1 hour has elapsed since the operation was stopped b Judging method Judge by setting the hysteresis on the final preset temperature The final preset temperature is the actually targeted preset temperature which is the sum of the basic preset temperature and each type of shift value e g 3 by remo
119. ng stop during operation Changes from Hi to Med or Lo depending on room Set to ultra Lo Lo Med Hi ultra Hi or stop depending on the room temperature time and heat exchange temperature Set to stop if the room temperature is 18 C in the Operating mode is judged by room temperature and outdoor temperature 1 Judging by outdoor temperature Operating mode is judged by outdoor temperature Only when the mode is not resticted by this judgment the judgment by room temperature in the next paragraph will be performed a Outdoor temperature 27 Restricted to cooling b Outdoor temperature lt 16 C Restricted to heating 2 Judging by room temperature Operating mode at start up is judged initial judgment a Conditions for judgment any of the followings When auto operation is started after 1 hour has elapsed since the operation was stopped When auto operation is started after the previous manual mode operation When the operating mode is switched to auto while operating at manual mode b Judging method Room temperature 25 C 3 Cooling Room temperature lt 25 C 3 Heating X 3 C is the fine adjustment value from the remote controller gt Room temperature p Heating 16 C 27 Outdoor Judging operating mode change during operation Continuous judgment temperature
120. ollector and Emittor in each operation condition is approximately as shown in Table 8 1 when measured by multimeter Table 8 1 Operation condition Collector voltage of Q701 Cooling General operation of cooling About 0 8V In normal heating operation About 35V MAX rotation speed instructed by indoor About 35V microcomputer after defrost is completed Heating Defrosting About 0 8V Dehumidifying Sensor dry About 0 8V 54 9 Electric expansion valve control circuit POWER P W B MAIN P W B CN15 B 12V B 12V B 12V 2R4033 R404 u 6 Microcomputer B i PQ401 R293 4 ry 1 AD 9 Valve4 Y PQ402 R294 LL 40 Valve3 Electric zl PQ403 R295 En 2 4 41 Valve2 valve J 404 OIO R296 Valver CN4B CNAA L 6 B 0V Fig 9 1 To drive the expansion valve use the B 12 V output Use a 4 phase coil and feed power to the phases 1 and 2 then switch over the filed poles to control the opening of the valve The reference between conducting phase switch over direction and the open close direction are shown in Table 9 1 When the power is turned on approx 0 9 V is applied to the CN15 and the pins CD to and when no power is supplied 12 V is applied When the power is reset the expansion valve starts initial
121. oor microcomputer AX 8T11 Overheat thermistor gt gt gt Defrost thermistor gt Outdoor temperature thermistor _ 99 gt Indoor Outdoor interface circuit 7 P En Reset ower circuit circuit Relay drive circuit Electric expansion valve DC compressor motor Reversing valve control circuit Reversing valve coil BASIC MODE MODEL RAS 25FH5 RAS 35FH5 Operation mode Fan Cooling Dehumidifying dehumiditying operation by the function select button only not including Heating that engaged by the dehumidify button auto Basic operation of start stop button Start stop button Start Stop Start Stop Operation lamp Start stop button Reserve button Cancel button Off timer Timer memory Off timer during stop Change in reserved time n 5 Srart stop button 2 Reserve button 2 Cancel button 3 On timer Operation lamp E Change in reserved time during operation Start stop button Reserve button Cancel button Operation lamp Off On Timer lamp On Off timer Timer memory OFF ON ON OFF Off gt On timer Off gt On timer On gt Off timer On gt Off timer duri
122. orizontal air defectors o Microcomputer 10 Os 11 12 o 13 Fig 4 1 Fig 4 1 shows the Auto sweep motor drive circuit the signals shown in Fig 4 2 are output from pin of microcomputer Micro computer pins Step width 10ms Horizontal air deflectors 1 2 3 4 5 6 7 8 Fig 4 2 Microcomputer Output Signals As the microcomputer s outputs change as shown in Fig 4 2 the coils of the auto sweep motor is excite to turn the rotor Table 4 1 shows the rotation angle of horizontal air deflectors Table 4 1 Auto sweep Motor Rotation Rotation angle per step Time per step ms Horizontal air deflectors 0 0882 32 5 Initial Setting Circuit IC401 When power is supplied the microcomputer reads the data in 401 402 E PROM and sets the preheating activation value and the rating and maximum speed of the compressor etc to their initial values Data of self diagnosis mode is stored in IC401 or IC402 data will not be erased even when power is turned off 5V 5V 5V C401 S S Microcomputer a a 27 SCL 26 External ROM 26 SDA 1C401 or IC402 E PROM OV Fig 5 1 6 Power Supply RE ii Barrie terminal board 5 9 Indoor
123. ox 10A DC current Compressor motor A DC Voltage N Detection resistor Fig 6 6 51 6 2 Reset Circuit _MAIN P W B W 12V 5V R287 0208 8 Microcomputer E ov 5 RESET OUT gt R252 R284 R286 gt 3 C204 Sl e IC5 1 2 N N E E VV OV OV OV ov R288 Fig 6 7 The reset circuit initializes the microcomputer program when Power is ON from OFF Low voltage at pin 48 resets the microcomputer and HI activates the microcomputer Fig 6 7 shows the reset circuit and Fig 6 8 shows waveform at each point when power is turned on and off When power is turned on 12V line and 5V line voltages rise and 12V line voltage reaches 10 9V an reset voltage input to pin 48 of microcomputer is set to Hi Reset voltage will be hold Hi until the 12V line voltage drops to 9 90V even though the power shuts down 12V line m o lt Power is ON Voltage V 1 5V line N Reset voltage 0 2 12V line 12 Power is OFF Voltage V 5V line N Reset voltage 0 Time Fig 6 8 52 7 Temperature Detection Circuit
124. p of any part check the insulation of the unit measure the insulation resistance between the power cord plug and grounding terminal of the unit The insulation resistance should be 1MO or more as measured by a 500V megger The initial location of installation such as window floor or the other should be checked for being and safe enough to support the repaired unit again If it is found not so strong and safe the unit should be installed at the initial location reinforced or at a new location Any inflammable thing should never be placed about the location of installation Check the grounding to see whether it is proper or not and if it is found improper connect the grounding terminal to the earth WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS 1 The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufacturers during maintenance and handling thereof They apply the same to handling of abnormal goods such as rejected goods being returned Object parts 1 Micro computer 2 Integrated circuits IC 3 Field effect transistors FET 4 boards or the like on which the parts mentioned in 1 and 2 of this paragraph are equipped Items to be observed in handling 1 Use a conductive container for carrying and storing of parts Even rejected goods should be handled in the same way conductive polyvinyl bag IC
125. peration is cancelled by the cancel button or sleep button all data is cleared Notes Setting Defrosting Inhibit Period DFTIM2 E eee M WU ME DFTIM1 NS KIIA KISSA SS KERES SEE SSE Kajos 5 C Outdoor temperature Notes 1 The time is set according to the outdoor temperature when it is between 0 C and 5 C 2 DFTIM1 is used when the outdoor temperature 2 0 C 3 DFTIM2 is used when the outdoor temperature lt 5 C 28 REFRIGERATING CYCLE DIAGRAM MODEL RAS 25FH5 RAC 25YH5 RAS 35FH5 RAC 35YH5 COOLING DEHUMIDIFYING DEFROSTING 9 52 12 7 IO Pp 6 25 Silencer 480 Reversing valve COMPRESSOR N 9 52 Silencer OUTDOOR UNIT Service valve 3 8 INDOOR UNIT Single ended union 9 52 3 8 9 52 9 52 9 52 19 Electric Expansion valve 6 35 gt Strainer WJ HEATING 9 52 0127 1 06 35 8 0 Silencer gg o Reversing valve L
126. rity and consider OK when it was low resistance Also it is OK if the resistance was as same as the other phases U V W niee et hetnet v K U sai lt Driver circuit internal IC gt 15V will not be generated when the internal IC has malfunctioned To find the malfunction either the power supply of power P W B or intemal IC please follow the procedure following By connecting CN3 and CN4 Check the voltage between 15V and gt Internal IC is OK 15 0V on power P W B Normal 15V Lower than 15V By disconnecting CN3 and CN4 E Check the voltage between 15V Driver IC which is in IPM may and 15 0V on power P W B malfunction Replace main P W B n Lower Normal 15V than 15V Power P W B may malfunction Replace power P W B 86 Procedure for Disassembly and Reassembly INDOOR UNIT RAS 25FH5 RAS 35FH5 1 Front Panel 1 Pull up the washable panel by holding it at both lower sides with both hands 2 When the panel opens full push the inner part of the right arm into the inside and pull the panel forward while closing it gradually Fig 2 2 Front cover 1 After removing two screws
127. rs only for outdoor thermistor Room thermistor or heat exchanger 1 Room thermistor 15 2 Heat exchanger thermistor 5 B 9 times en room thermistor or heat exchanger thermistor is opened circuit or short circuit Over current detection at the DC fan 1 Indoor fan locked motor 2 Indoor fan motor 6 HiH 10 times when over current is detected at the 3 Indoor control P W B DC fan motor of the indoor unit IC401 or IC402 data reading error IC401 or IC402 abnormal 7 g EA 13 times When data read from IC401 or 402 is incorrect Lights for 0 35 sec at interval of 0 35 sec lt Cautions gt 1 If the interface circuit is faulty when power is supplied the self diagnosis display will not be displayed 2 If the indoor unit does not operate at all check if the connecting cable is connected to the outdoor unit 3 To check operation again when the timer lamp is blinking you can use the remote control for operation except for mode mark X1 66 SELF DIAGNOSIS LIGHTING MODE MODEL RAC 25YH5 RAC 35YH5 ANA DANGER DC350V CUT THE POWER SOURCE AND WAIT MORE THAN 10 MINUTES BEFORE SERVICE WORK THE DC VOLTAGE AT THE MEASURING POINT IN FIGURE SHOWN MUST BE LESS THAN 10V ODO NOT TOUCH THE OTHER COMPONENTS WHEN OPERATINGTHE SERVICE SWITCH SERV ROCED OWN OR OF OUTDOOR UNIT
128. surge absorber and varistors absorb external power surge such as induced thunder Be sure to connect the earth cable between the indoor unit and the outdoor unit Otherwise the surge absorber and the varistors won t operate R002 and R007 The resistor R002 protects the rush current when the power is turned on while the resistor R007 protects the rush current when the compressor starts When the R002 has any failure the control power supply won t operate When the R007 has any failure and a strong rush current is generated the DB2 C021 or C022 may be damaged 37 3 Indoor Outdoor Interface Circuit The interface circuit superimposes an interface signal on the DC 35V line to perform communications between indoor and outdoor units This circuit consists of a transmitting circuit which superimposes an interface signal transmit from the microcomputer on the DC 35V line and a circuit which detects the interface signal on the DC 35V line Communications are performed alternatively transmitting and receiving 3 1 Communication signal from outdoor microcomputer to indoor microcomputer At first outdoor microcomputer will send a reguest signal SDO to indoor microcomputer 38 KHz of carrier signal is generated and modulated by the request signal SDO from the outdoor microcomputer pin 1 This signal is superimposed to DC 35V line via C801 and L801 To prevent erroneous reception the outdoor microcomputer is designed so that it cannot receive
129. t during operation 1 The indoor fan won t rotate No air comes from the unit 2 The air speed won t change The preset temperature is not indicated on the remote control 1 The temperature arrives at the preset indoor temperature and the air conditioner unit is temporarily stopped Within about 3 minutes the fan starts rotation 2 When the unit operates at LOW air speed it continues to operate at the same speed When automatic operation is performed the preset temperature won t be indicated However you can adjust the temperature within range of 3 C by pressing the Room Temperature button If the temperature is 1 C higher than the auto preset temperature A 1 C will appear If the temperature is 1 C lower than the auto preset temperature v 1 C will appear The heat exchanger temperature This is because the cool wind prevention function is operating and does not indicate a fault The indoor fan varies among high air flow low air flow and breeze in the auto fan speed is sensed in the auto speed mode When the temperature is low the fan speed varies among high air mode Heating operation Loud noise from the outdoor unit is heard when operation is started Noise from the outdoor unit occasionally changes There is a difference between the set temperature and room temperature Air does not flow immediately after operation is started flow low air
130. te controller preset temperature correction value powerful shift value etc Currently cooling Room temperature S Final preset temperature Room temperature gt Final preset temperature Currently heating Room temperature gt Final preset temperature Room temperature lt Final preset temperature 26 2 C Change to heating 2 C Continue cooling 3 C Change to cooling 3 C Continue heating Cooling Heating final preset temperature 3 C Same as at left Performs the sleep operation of each operation mode 23 Table 1 Mode data file RAS 25FH5 RAS 35FH5 LABEL NAME VALUE WMAX 3800 4500 min WMAX2 3800 4500 min WSTD 3150 3750 min WBEMAX 2500 min 2800 CMAX 3300 min 3800 min CMAX2 3300 min 3800 min CSTD 2050 min 3150 min CKYMAX 2050 3000 min CJKMAX 1800 min 2200 min CBEMAX 1600 min 1700 min WMIN 800 800 min CMIN 1400 min 1400 min STARTMC 90 Seconds 90 Seconds DWNRATEW 80 80 DWNRATEC 60 60 SHIFTW 2 00 C 2 00 C SHIFTC 1 33 C 1 33 C CLMXTP 30 00 C 30 00 C YNEOF 25 00 C 25 00 C TEION 5 00 C 5 00 C TEIOF 9 00 C 9 00 C SFTDSW 1 00 C 1 00 C DFTIM1 43 Minutes 43 Minutes DFTIM2 60 Minutes 60 Minutes 24 Table 1 Thermo judgment Basic Cooling Operation CLMXTP
131. temperature ultra Lo mode other than during preheating cooling is recovered at 18 33 C When the compressor is running at maximum speed In modes other than during hot dash or when recovered from defrosting left Temperature set for cooling 42 66 37 66 32 66 29 66 44 Heat exchanger Hi or ultra HI temperature mu fan speed set 1 Runs at Hi until first thermo to auto JN off after operation is started Med 5 2 Runs at Lo when thermo is Lo n off o 9 Hi Operates at Hi regardless of the Set to ultra Hi when the Set to ultra Lo Lo Med Hi ultra Hi or stop depending on the room temperature and room temperature compressor runs at maximum time Set to stop if the room temperature is 18 C in the ultra Lo mode other than during speed and to Hi in other modes preheating cooling is recovered at 18 33 C Set to ultra Hi when the compressor is running at maximum speed during hot dash or when ai recovered from defrosting a n 8 Med Operates at regardless of Same as at left Set to ultra Lo Lo Med or stop depending on the room temperature and time Set to the room temperature stop if the room temperature is 18 C in the ultra Lo mode other than during preseating cooling is recovered at 18 33 C Lo Operates at Lo regardless of the Same as at left Set to Lo in modes other tha
132. uM ATE E ETE EINE 26 Luz Aejdsip einje1eduje 195 IHOVLIH uonejedo dois oj eur 4018 enen jo s uey 4015 1 15 eui ssa1d aan E ppinb UJOOJ y Se E911000093 jemb aow pays ueeq sey eJnjeJeduuej Aypeanreworne GAIN pue 5 OLN o 1seBuoJis ay IH uoung 184445 Nv4 eui 594 Dunes sareoipui Aejdsip 9334 q3ads 195 Nv3 1000 Aejdsip ey yey OS NOILONNA 94 SOJLIIPUI Aejdsip eui yey os 1000858 NOILONNA SY 55 IHOVLIH Jewwns jo pue aui 1e JOOPUI ey JO y eulos 08 Y IY Asen pun 100pu BY JO BUI AIP O SIYI esf ue se eui esn ULI 2227 0101 SI eunjejeduie 100pino eui 10 eui 95 NOI1VH3d0 NOI1VH340 9 11009 gi euin 1xeu
133. uoripuoo eui eq Ajqissod 941 50015 uoijesedo se 6 uey pue pejooo si uoiuM y esiou Buigqnu 14616 ejok9 UI jo esiou Burmo 14615 1 uoneJedo ey 10 jewJouge jou ing nooo Buruuns y Burddojs 10 Jexeeq jo Buun ejo o ejoKo eq ueo eJnjrej eui JO enjeu eui Sy syulja Aejdsip jun uo dure HINIL 5 u10 SI S 10 JOY 55 5196 pJoo amod ay HUN BUI Apeyueprooe 2 10 U A sejes nok pue Bnjd eur Ind Jo yo 1exeeJq ay suonoedsuI Buiuuoyed Joye Ajeuuou 0 5116 145 HUN eui gj ejgeis 100 si ay oe Ajuanbey esn BUI 10 HO 941 111090 pjnous sajes 198140 JO 100 ay UI ejdoed jo ey uo 9
134. ut 280 V TERMINAL BOARD POWER UPL ocen sunt ns aa Shel ag nh eee N Peel MAIN P B 4 GRAY i 11 o 22 5 m Li BLUE TABOS gt 5 iTAB12 ze UJ a i 1001 L be morb _ si i San 5 z i TABO6 i 8 8 127 ip Siles wd m N TABO4 7 4 RED 008 TO MICROCOMPUTER f B j i 4 PURPLE GREENS mM m se 4 ORANGE i 1003 1002 2 i 081 1102 SWITCHING sta aa R002 6012 0007 POWER SUPPLY 0013 C008 Fig 2 1 Main parts DB2 rectifies the AC voltage The possible causes for the DB2 failure are as follows The 15 A fuse may be blown out or the IPM for the main P W B may have a failure In such a case check the 15 A fuse for blowout and replace the main P W B if necessary 083 L1 C023 and L2 The DB3 L1 C023 and L2 shape waveform of the input current When the current runs through the L1 is taken for 11 and the current runs through the L2 is taken for 12 as shown in Fig 2 2 1 becomes an input current to the capacitor which peak value was crushed by the L1 and I2 becomes a resonance current which causes the LC resonance using the L2 and C023 By co
135. vice value cover lock screws and lower the cover to remove it 2 Remove the top cover lock screw and raise the cover to remove it 3 Remove the front cover lock screw 4 Lower the right side of the front cover and pull it forward Then remove the cover from the hook 5 Pull the right side of the front cover a little and pull up the left side to remove it from the hook 6 Remove each connector and earth cable from the lead wire 7 Remove four lock screws from the main P W B and pull two support hooks at the front side to remove the P W B 8 Pull three support hooks at the rear side of the Power P W B to remove the P W B Support hooks 855 Q 2707 Power Support hooks Fig 10 88 PARTS LIST AND DIAGRAM MODEL RAS 25FH5 RAS 35FH5 INDOOR UNIT lt gt INDOOR UNIT PARTS NO NO TY PARTS NAME 4 25 5 1 25414 6 HWRAS2SYHA aor TANGENTALEAN 5 ao 3 FANCOVER 9 HWRAS2SYHi ato 1 FANMOTORSUPPORT COVER LOWER R 90 OUTDOOR UNIT MODEL RAC 25YH5 RAC 35YH5 91 OUTDOOR UNIT PARTS NO 6 HWRACDIEX2 Ao 1 REVERSNGVADE 5 A ELECTRIC EXPANSION VALVE
136. zou oq epis uonons pue jo jaued uiui sioef qo 1nd Jou 10 ue ejqeo jo osn nsa ejqeo eui jo eDexeeug usanmaq 1 1nd 10 1 SseooJd yeay uo 1nd y ejqeo eui jou NOLLISIHOHA yeay yoous ue esneo os JON eui 1UDABIA Y UONIPPE UI si Siy 1990s y 18U10 eu jo spee Auew jou op 10 uoisuejxe ue uy eqjeo eui 199UU09 JOU ONINHYM 7 O yeay INOA 10 Jo ponad ue pedoidw J asinoA pun ey jjeysuie1 pue 11990 10 YOOYS 2u199 3 UN y E1SUIDI pue peeu ji INOA 1981409 esee d pue xoous esneo jjes eoueuejureui JOJ INOA 1981409 asea q jewJouge Japun 10 jun ey BNUNUOD NOA 11900

Download Pdf Manuals

Related Search

here hereditary heretic heredity here movie here comes the sun heretic definition hereinafter hereditary meaning heresy definition hereby here\u0027s johnny hereafter hereditary spherocytosis hereditary hemochromatosis heretic perfume hereditary angioedema here comes the sun lyrics heretic movie herencia hereditary hemorrhagic telangiectasia hereditary movie here to slay heredia costa rica hereditariedade here comes the bus

Related Contents

Alicante MP36 Sevilla MP36  BakkerElkhuizen HandShoeMouse  Lutter contre l`ambroisie : mode d`emploi  Neurodyn Evolution  カタログ - フジ医療器  

Copyright © All rights reserved. Failed to retrieve file