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SERVICE MANUAL - Mitsubishi Electric Cooling & Heating

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2. MXZ 2A20NA MXZ 2A20NA 1 thermistor RT64 thermistor RT68 200 100 MXZ 2A20NA 2 MXZ 3A30NA 180 o Discharge temperature thermistor RT62 180 x 140 600 8 120 g 70 Es S 100 S eo 2 0 9 soo s 8 2 80 9 so 8 400 02 60 a S 2 ab 40 5 300 QU 8 200 5 5 20 30 2 8 032 50 68 86 104 122 140 158 176 20 1 o 2 Temperature F 10 x 032 so 68 86 104 122 140 158 176 194 212 230 248 gt oT 5 5 gt o 0 Temperature F RS iz g 958 oos eem 4 14 32 50 68 86 104 Es 5 ors o Temperature F So 250 U L x S D ot 8 Qos AT gt Except MXZ 2A20NA 1 2 npo 9 Qe 292 988 EL 5 BE 5s8 albo E eee 9 g So 5 So 25 255388
3. MXZ 2A20NA Unit inch MXZ 2A20NA 1 MXZ 2A20NA 2 Connected pipes Length Length Length MXZ 3A30NA Moderne diameter A B C T MXZ 3A30NA 1 MXZ 4A36NA per MAC A454JP 63 8 1 2 3 8 1 2 2 72 MAC A455JP 1 2 43 8 1 2 3 8 2 56 For different diameter MAC A456JP 1 2 5 8 1 2 5 8 2 62 pipes PAC 493PI 1 4 d 3 8 1 4 3 8 2 38 PAC SG76RJ E 438 5 8 3 8 65 8 4 15 2 OUTLET GUIDE Changes air discharge direction Unit inch Applied unit Model name Model code n za MXZ 2A20NA TN as uu MXZ 2A20NA 7 MAC 889SG 506 889 3 aS NT MXZ 2A20NA MXZ 3A30NA E mi cR MXZ 3A30NA 11 MAC 855SG 51H 855 Ra MXZ 4A36NA Re D n Sx ke S8 Ke Ra Re H Ra z ER OK MAC 889SG 213 16 24 1 32 5 29 32 21 1 32 ae s AMan 4 5 16 EN 15 3 16 unched hole 2 e 8 i gt F 16 3 8 32 3 4 15 3 16 21 1 32 110 1 4 29 15 16 3 16 91 4 8 Punched hole k MAC 855SG 111 Mi S CMT MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3
4. 90 PARTS LIST non RoHS compliant MXZ 3A30NA 13 3 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration Parts No Parts Name Symbol in Wiring Diagram Q ty unit MXZ 3A30NA Remakes M21 TKO 232 FRONT PANEL M21 TKO 027 HANDLE ASSEMBLY M21 5 010 GRILLE M21 TKO 245 SERVICE PANEL T92 500 801 COMPRESSOR TNB220FMCH T2W TKO 505 COMPRESSOR RUBBER SET 3 RUBBERS SET R01 E39 401 EXPANSION VALVE C room T2W TKO 653 LEV COIL C room R01 E39 401 EXPANSION VALVE B room T2W TKO 652 LEV COIL B room R01 E39 401 EXPANSION VALVE A room T2W TKO 651 LEV COIL A room M21 TKO 290 BASE ASSEMBLY M21 42E 644 UNION 24 2 4318 1 4 SET T2W TKO 247 PIPE COVER M21 5 667 BALL VALVE LIQUID 3 8 3 8 T2W J7E 667 BALL VALVE GAS 5 8 518 M21 J7E 248 REAR PANEL T2W TKO 959 POWER RECEIVER T2W J7E 961 4 WAY VALVE M21 NT1 646 HIGH PRESSURE SWITCH T2W WW8 401 EXPANSION VALVE T2W TKO 651 LEV COIL M21 TKO 297 TOP PANEL T2W E40 523 REAR GUARD M21 J7E 630 HEAT EXCHANGER M21 TKO 249 SIDE PANEL M21
5. OUTDOOR UNIT MXZ 3A30NA 2 1 MXZ 4A36NA 1 09 class unit in single operation lt COOL gt Capacity lt COOL gt Total inpu lt HEAT gt Capacity lt HEAT gt Total input 2 0 2 0 2 0 1 5 1 5 1 5 1 0 1 0 1 0 0 5 0 5 0 5 50 100 Hz 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz Frequency Frequency Frequency Frequency 2 12 class unit in single operation lt COOL gt Capacity lt COOL gt Total lt HEAT gt Capacity lt HEAT gt Total input 2 0 2 0 2 0 15 15 1 5 1 0 1 0 1 0 0 5 0 5 0 5 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz Frequency Frequency Frequency Frequency 3 15 class unit in single operation lt COOL gt Capacity lt COOL gt Total inpu lt HEAT gt Capacity HEAT Total input 2 0 2 0 2 0 1 5 1 5 1 5 1 0 1 0 1 0 0 5 0 5 0 5 50 100 Hz 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz Frequency Frequency Frequency Frequency 4 17 class unit in single operation lt COOL gt Capacity lt COOL gt Total inpu lt HEAT gt Capacity HEAT Total input 2 0 2 0 2 0 15 15 1 5 1 0 1 0 1 0 0 5 0 5 0 5 50 100 Hz 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz Frequency Frequency Frequency Frequency 5 24 class unit in single operation lt COOL gt Capacity lt COOL gt Total input lt HEAT gt Capacity lt HEAT gt Total input 2 0 2 0 2 0 1 5 1 5 1 5 1 0 1 0 1 0 0 5 0 5 0 5 50 100 Hz 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz Frequency Frequency Frequency Frequency 8 4 Outdoor low pressure and outd
6. MXZ 2A20NA 2 2 20 MXZ 2A20NA 2 Cooling capacity Total input cooling g 140 T 16 7 20 0 14 A 5 Gg 5o 130 81 3 513 25 E 88 119 12 79 51 2 mo g 79 75 72 25 106 81 1 75 68 so i 8 64 amp 1 0 H door 72 51 FEL o 8 a lake We WB UP lem 12 8 6 0 9 erature 1 64 0 9 Ea intake o 8 El 3 80 85 90 95 100 105 110 80 85 90 95 100 105 110 5 Outdoor intake air DB temperature F Outdoor intake air DB temperature F 5 8 228 Heating capacit Total input heati o 4327 4710 574 T ME otal input heating gt 40 0 12 Tes 79 12 ure 42 79 Bm 365 5 X E perd 68 Eg gt gU eS 8 11 L ode 9 59 5 E ag 233 suo dee 2 10 Have n gt 00 Z pF Os 209 EER oot ERE 5 5 26 6 gt PIS 12 3 5 gt 55 8 0 8 vod EELE 5 0 8 23 2 507 1 07 s 20 0 0 6 0 6 235 2 14 23 32 41 50 59 14 23 32 41 50 59 Sc 5 Outdoor intake air Wet bulb temperature F Outdoor intake air Wet bulb temperature F eto o FEE NOTE The above broken lines for the heating operation without any frost defrost operation MXZ 4A36NA MXZ 3A30NA MXZ 3A30NA 1 Cooling capacity 14 0 w 13 0 N N 11 9 75 10 6 72 68 64
7. LED1LED2 a ON memesmosetsessteser Aser cisse serre Lighting gt ee 2 5 second OFF 59 Indication LED1 Red LED2 Yellow Symptom Abnormal point Condition Condition Correspondence Outdoor unit Primary current protection Once Lighting When the input current exceeds 15 operates Secondary current protection When the current of the compressor exceeds 15 Twice Lighting High pressure protection When the indoor gas pipe temperature exceeds 113 F during heating Defrosting in cooling When the indoor gas pipe temperature falls 37 4 F or below during cooling These symptoms do not mean any abnormality of the product but check the following points Check if indoor filters are clogged Check if refrigerant is short Check if indoor outdoor unit air circulation is short cycled Discharge temperature protection 3 times Lighting When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 122 F COOL mode 104 F HEAT mode for more than 40 minutes Check refrigerant circuit and refrigerant amount Refer to 11 6 Check of LEV Refer to 11 6 Check of outdoor thermistors Low discharge times temperature protection Lighting When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 102 2 F for mo
8. Model MXZ 3A30NA MXZ 3A30NA Item Cooling Heating Capacity 28 400 28 600 SHF Input 2 18 Electrical circuit Outdoor unit MXZ 3A30NA MXZ 3A30NA Power supply V phase Hz 208 230 1 60 Input 3 197 2 127 Comp current 208 230V 15 45 13 97 10 15 9 18 Fan motor current 208 230V 0 43 0 39 0 43 0 39 Refrigerant circuit Condensing pressure 506 330 Suction pressure 136 96 Discharge temperature 190 Condensing temperature 132 Suction temperature 48 Comp shell bottom temp Ref pipe length Total pipe length for multi system Refrigerant charge R410A Outdoor unit DB Intake air temperature WB Fan speed Airflow 39 Model MXZ 4A36NA Item Cooling Heating Capacity 36 000 36 000 SHF Input 3 1 Electrical circuit Outdoor unit MXZ 4A36NA Power supply phase Hz 208 230 1 60 Input 3 756 3 036 Comp current 208 230V 17 85 16 14 14 36 12 98 Fan motor current 208 230V 0 43 0 39 0 43 0 39 Refrigerant circuit Condensing pressure 458 338 Suction pressure 136 93 Discharge temperature 194 Condensing temperature 125 Suction temperature
9. 93 14 RoHS PARTS LIST RoHS compliant MXZ 2A20NA MXZ 2A20NA 1 14 1 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS NS NN SCC EAS roe RAG 1 E A SE XA A IRA S d C 5 e 19 20 21 10 9 94 PARTS LIST RoHS compliant MXZ 2A20NA 2 2 20 1 14 1 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration Parts No Parts Name Symbol in Wiring Diagram Q ty unit MXZ 2A20NA MXZ 2A20NA4 Remakes E12 939 232 CABINET 1 1 E12 817 009 HANDLE 1 E12 939 521 GRILLE 1 E12 B05 900 COMPRESSOR SNB130FPDH1 E12 C15 900 COMPRESSOR SNB130FQBH1 E12 065 506 COMPRESSOR RUBBER 3 RUBBERS SET E12 851 640 EXPANSION VALVE B room E12 939 493 LEV COIL B room E12 851 640 EXPANSION VALVE A room E12 938 493 LEV COIL A room E12 939 290 BASE E12 C06 666 UNION GAS 3 8 E12 C18 666 UNION GAS 3 8 E12 C06 667 UNION LIQUID 4 E12 18 667 UNION LIQUID 114
10. Service port Compressor R V coil Service Discharge _q___ __ OFF Refrigerant flow in cooling port gt Refrigerant flow in heating oi J il separator 5 Capillary tube Unit B gas pipe thermistor Ball valve with O D 0 10 x I D 0 02 x 39 37 Indoor unit ck service port B P LANI 4 way valve Unit A gas pipe e temperature thermistor Muffler Indoor unit Ck gt Outdoor heat exchanger lt temperature FAN OUT thermistor TTT RT68 brodo dod T d 1 1 4 1 1 1 1 5 y bor dod og Ambient o e temperature ig ee ee thermistor ee nie Capillary tube EOM ENT NER aL UM O D 0 16 x I D 0 11 x 3 93 RT61 Indoor unit lt gt 4 CO RO Capillary tube Strainer LEVA O D 0 14 x 1 0 09 x 19 68 Ball walve Strainer isin SEE 100 LEVE 100 Distributor D Power D receiver gt ner ef Capillary tube O D 0 16 x 1 D 0 11 x 3 93 Indoor unit ikan ma Strainer LEV 100 Except MXZ 2A20NA 1 MXZ 2A20NA 2 Service R V coil Service Discharge e_____ OFF gt Refrigerant flow in cooling port temperature gt Refrigerant flow in heatin thermistor R162 g g Oil separator Capillary tube O D 0 10 x 1 D 0 02 x 39 37 Indoor unit Stop valve with service port B Muffler Indoor unit b lt Outdoor heat exchanger a temperature
11. diis mE LHM SE ims on VON LINN qa el eI E O 0 DIE TD xr 7081 9 1081NOO 2INOH12313 g eal WEES o Sz MLB NS 9 e ONINO unc 60655 S LINN MA 11 SB O 0 2 co m 601 9201 annona tet L_ _ 4 H 98407 m 4082 80 s w OL Addis 00 1 el EE Em TOO peg 1 I 1 H3MOd 5 M p 26 MXZ 2A20NA 1 103380002 T TL P J 320 q PUIUJ8 O BJEITPUI M0 8q 510 5 BULITA 1 103 A UD s103anpuor 190002 851 2 BUT31A185 204 WEIGEIP SULITA 31112818 j Un 100pU ay 03 13431 6UIJIM 211138 8 5 200 ayy jnoqy T 5310N VLE6U IN 1083 DU m 201 17 17 70 189 10 GIONS TOS ANA MIGE ________________________ amp STIUND HOLDS 30004 U3MOd 1N391111NI _ NJL 1N3IBWY 9918 HALI 3SION d N H3MOd IN3OTTISINI Av 138 9X YOLSIWYSHL 919 HOLSTHVA SUN 0 SNS 793 39018 WNIWYSL YSWYOISNVYL 1100 010 3105 _ TOLNI QHvOS H3MOd 23 5984 8814
12. of outdoor fan motor 9 time flash Nonvolatile memory data Lighting 5 times When nonvolatile memory data cannot be read properly Replace the outdoor electronic control P C board 10 time flash Discharge temperature Lighting Lighting When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 102 2 F for more than 20 minutes Check refrigerant circuit and refrigerant amount Refer to 11 6 0 of LEV NOTE Blinking patterns of this mode differ from the ones of Troubleshooting check table 11 4 57 The left lamp of OPERATION INDICATOR lamp Indoor unit Abnormal point Failure mode protection LED indication Outdoor P C board LED 1 LED 2 Condition Correspondence Indoor outdoor unit failure mode recall function 11 time flash Communication error between P C boards Lighting 6 times Communication error occurs between the electronic control P C board and power board for more than 10 seconds When the communication between boards protection stop is continuously performed twice Check the connecting wire between outdoor electronic control P C board and power board Current sensor Lighting 7 times When a short or open circuit is detected in the current sensor during compressor operating Current sensor protection st
13. 3 3 z914 a914 3AM 1914 3918 8918 valy T99NO TBSNO S6LNO OE62H TOLND 5 IOHLNOO OINOHIO3 13 6 NO NIE 43803 1N3911131N1 HOLIMS HOIH 64 038 2121 Se EE H i CAEN EE m 9207 zm val T9uss Yrs ki au le Quv08 2 1809 HaT 9811238802 001101 TO9NI 9N1123NN02 LINN HOOONT 01 ZO9NI EIU ISITcIeIT 209 5 9811238802 D ON LINN HOOONT 01 Dy 2 09 TE TT 446 HIMOd ONNOHD 29 1 2 10128UU02 330 q BUIUJ8 0 3e21PU1 stoguag e AV 09 GION3TOS 19855 0151539 7159 YOSSSUdWOD 94 AOSE IST ED 3503 T 63 BUTITM 104 HOLSTAE3HI 80151538 JB 3ATVA NOISNVAX 3 A31 AOGETVST ED 3503 1084 Kjuo s103npuo3 asn gll L SNVHOX3 1V3H HOISIS3H 8 ros NoISNvdx3 V 431 910 3508 594 51114185 100 ANA NISHAR YSTZ HOLSINGERL 1 IN3IENV SOLU HOLOVd 259 Wel 5 4 2110 189 108
14. In 1 door ail B a Capacity correction factors Indoor air WB temperature difference degree o tempera tui E 80 85 90 95 100 105 110 Outdoor intake air DB temperature F Indoor unit class Inverter output frequency Heating capacity Total input cooling 1 4 2 91 3 5 S s 1 2 75 72 21 1 68 8 64 amp gu Temperature e 0 9 indoof intake ait L 80 85 90 95 100 105 110 Outdoor intake air DB temperature F Total input heati o otal input heating 43 2 47 0 574 1 643 49 7 13 13 68 B 5 40 0 12 es 79 12 aure 9 79 25 36 5 8 11 oe 5 11 jp tere 68 58 we 8 oW P 59 ber 33 3 S10 a9 10 Entre 9 28 299 491221 w06 L LL LE 0 9 09 Il 266 gt ot 24 8 55 i gos OO os B 232 807 L 07 PL 20 0 0 6 0 6 14 23 32 41 5 59 14 23 32 41 50 59 09 class 12 class 15 class 56Hz 17 class 24 class Indoor unit class Inverter o
15. SdH W3WNOJSNVHL INAANO 2119 uaa pe imi 1081 NOISIWEGHI 1508440 1919 SOLON TINGOW INGOITHIN SNIHLOONS 65180 SION MN TONAS EIN TOENAS TOENAS NVN TOENAS NVN TOENAS ai gn Se An o An 8 Am v An ZD PEPER PEPER LEPEL 1 100807 e v6LNI E6LNI 26139 16239 5 ANY ao rur iod dore Ns nig HM OPT Ti REC AP a it 8026 Z Bl gt vitis Tana m OUVOE Id IOMINOO OINOHLIO3 T3 es Aoun JHM 75 PET 9B ONIN zeeno ne e va Mee 5 CD 0 IN 9 LOLND 20140 18 ND BOOON 0 ELL 21915 7 E lel SPELD ETET a en ni Jus roS AWM g ER ERR E Dass 89 NIMOY P ppe SEND ININ pue rS ise ee EB ons yg 2 HOOONI OL ES 601 ii ea LIT 2 Ses EEDA NE In 5 Sal mo DU mmn zieno 2301 106N2 IL OS gt ONLIINNOD H CN IN of 19485 Oka YOON OL ZE ma OS o ZH09 9560 aN een AOEZ BOZ n KlddNS 4 bal 9 ILL qavoaod BAMOd HALI 3SION 31 7 REFRIGERANT SYSTEM DIAGRAM MXZ 2A20NA 2 2 20 1 Unit mm
16. M21 L2V 653 LEV COIL C room M21 L2V 401 EXPANSION VALVE B room M21 L2V 652 LEV COIL B room M21 L2V 401 EXPANSION VALVE A room M21 L2V 651 LEV COIL A room M21 0A2 290 BASE ASSEMBLY M21 0A2 644 UNION 112 43 8 4114 SET M21 0A2 668 STOP VALVE LIQUID 3 8 3 8 M21 0A6 667 STOP VALVE GAS 5 8 5 8 M21 0 2 248 REAR PANEL T2W L7V 642 4 WAY VALVE M21 L2V 646 HIGH PRESSURE SWITCH aAjajajalajajajalajaljlajaljlajalalw i ialalN 4 8 MPa 48 9 kg cm M21 L2V 402 EXPANSION VALVE gt gt gt gt gt gt gt gt gt gt gt gt gt gt M21 0 2 402 EXPANSION VALVE F M21 0 2 652 LEV COIL M21 L2V 297 TOP PANEL M21 0 2 523 REAR GUARD T2W 0 6 630 HEAT EXCHANGER T2W 0 2 630 HEAT EXCHANGER M21 L2V 249 SIDE PANEL T2W L7V 641 SERVICE PORT T2W L7V 959 POWER RECEIVER M21 0 2 937 CAPILLARY TUBE O D 0 12 x 1 D 0 08 x 11 8 M21 0A2 936 CAPILLARY TUBE O D 0 16 x I D 0 11 x 3 94 M21 L2V 938 CAPILLARY TUBE O D 0 10 x 1 D 0 02 x 39 37 T2W L7V 656 OIL
17. TEL OLSINU3HI dHIL 39UVHISIO 2918 YOLOW x 052 WTL 35 4 1163 1081 MOISIWU3Hl 1604330 1918 HOSS3UdW00 W AOSZ WST EL 3504 1083 19855 HOlSIS3H ____ 159 NOISNVGX3 BINBOISNVEL IN3HUIO 1915 8919 1918 038 QHVOS 72 IOMLNOO 9INOHLO3 13 IE ee EM gms nis LHM g ge s s Same 55 MMC 1038 T olie 25 cmo em 8 E db a m 130 e rug IT Te TAL x BOISIS3H a ViEGH 8 Y H3WHOJSNVHL 112 SBOlSIG3H g VI SOLIS 1 BOLIOVdVO ONTHLOOWS ES S9NLLO3NNOJ LINN WOOQNI OL S9NLLO3NNOJ GON LINN WOOQNI 01 2809 252001 AQEZ 802 AlddflS 83404 27 MXZ 2A20NA 2 15 1 AWS U3ONVHOX3 IV3H HOOOLNO 0151539 8 VLEBU MOSS 3HdH00 W 0
18. 1 780 8 82 97 22 000 8 500 22 000 1 780 520 1 780 8 82 97 MXZ 3A30NA MXZ 3A30NA Cooling capacity BTU h Indoor units combination Unit Total Power consumption W Current A 208 V 230 V 09 9 000 7 200 9 000 800 650 800 4 05 3 66 12 12 000 7 200 12 000 1 000 650 1 000 5 06 4 58 15 15 000 7 200 15 000 1 320 650 1 320 6 68 6 04 17 16 200 7 200 16 200 1 480 650 1 480 7 49 6 77 24 22 000 7 200 22 000 2 220 650 2 200 11 13 10 07 09409 18 000 12 000 18 000 1 800 920 1 800 8 92 8 07 09712 21 000 12 000 21 000 2 000 920 2 000 9 91 8 96 09415 24 000 12 000 24 000 2 500 920 2 500 12 39 11 21 09717 25 200 12 000 25 200 2 700 920 2 700 13 38 12 10 09 24 28 000 12 000 28 000 3 200 920 3 200 15 86 14 34 12 12 24 000 12 000 24 000 2 500 920 2 500 12 39 11 21 12 15 26 000 12 000 26 000 2 800 920 2 800 13 88 12 55 12 17 26 000 12 000 26 000 2 800 920 2 800 13 88 12 55 15 15 26 000 12 000 26 000 2 800 920 2 800 13 88 12 55 15 17 26 000 12 000 26 000
19. 22 000 7 200 22 000 2 200 650 2 200 11 13 95 09 09 18 000 12 000 18 000 1 800 920 1 800 8 92 97 09 12 21 000 12 000 21 000 2 000 920 2 000 9 91 97 09 15 24 000 12 000 24 000 2 500 920 2 500 12 39 97 09 17 25 200 12 000 25 200 2 700 920 2 700 13 38 97 09 24 28 000 12 000 28 000 3 200 920 3 200 15 86 97 12 12 24 000 12 000 24 000 2 500 920 2 500 12 39 97 12 15 26 000 12 000 26 000 2 800 920 2 800 13 88 97 12 17 26 000 12 000 26 000 2 800 920 2 800 13 88 97 15 15 26 000 12 000 26 000 2 800 920 2 800 13 88 97 15 17 26 000 12 000 26 000 2 800 920 2 800 13 88 97 17 17 26 000 12 000 26 000 2 800 920 2 800 13 88 97 09 09 09 27 000 12 600 27 000 2 860 1 000 2 850 14 18 97 09 09 12 30 000 12 600 30 000 3 270 1 000 3 270 16 21 97 09 09 15 32 100 12 600 32 100 3 500 1 000 3 500 17 35 97 09 09 17 32 100 12 600 32 100 3 500 1 000 3 500 17 35 97 09 09 24 32 100 12 600 32 100 3 500 1 000 3 500 17 35 97 09 12 12 32 100 12 600 32 100 10 3 500 1 000 3 500 17
20. Check the connection of the compressor connecting within 1 minute after the compressor gets started or when converter wire protection stop or bus bar voltage protection stop is continuously performed Refer to 11 6 How to check inverter compressor three times within 3 minutes after start up Check the stop valve Lighting Outdoor power system When a short circuit is detected in the thermistor during operation or when an open circuit is detected in the thermistor after 10 minutes of compressor start up Discharge temperature Refer to 11 6 Check of outdoor thermistors Lighting 3 times hermistor Fin temperature hermistor When a short or open circuit is detected in the thermistor during P C board temperature operation hermistor Ambient temperature When a short or open circuit is detected in the thermistor during hermistor operation Refer to 11 6 Check of outdoor thermistors Lighting 4 times Replace the outdoor electronic control P C board When a short circuit is detected in the thermistor during operation or when an open circuit is detected in the thermistor after 5 minutes in cooling and 10 minutes in heating of compressor start up Refer to 11 6 Check of outdoor thermistors Outdoor heat exchanger emperature thermistor Lighting 5 times When a short circuit is detected in the thermistor during operation or Defrost thermistor when an open circuit
21. PARTS LIST non RoHS compliant MXZ 2A20NA 13 1 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration Parts No Parts Name Symbol in Wiring Diagram Q ty unit MXZ 2A20NA Remakes E02 939 232 CABINET E02 817 009 HANDLE E02 939 521 GRILLE 202 B05 900 COMPRESSOR SNB130FPDH1 E02 065 506 COMPRESSOR RUBBER SET 3 RUBBERS SET E02 851 640 EXPANSION VALVE B room E02 939 493 LEV COIL B room E02 851 640 EXPANSION VALVE room E02 938 493 LEV COIL A room E02 939 290 BASE E02 939 666 UNION GAS 3 8 E02 939 667 UNION LIQUID 114 02 939 233 02 939 245 SERVICE PANEL 202 B05 661 BALL VALVE GAS 85 8 02 939 662 BALL VALVE LIQUID 3 8 E02 938 959 POWER RECEIVER E02 819 640 EXPANSION VALVE E02 819 493 LEV COIL E02 A56 961 4 WAY VALVE E02 819 297 TOP PANEL E02 939 523 REAR GUARD E02 B05 630 HEAT EXCHANGER E02 939 515 MOTOR SUPPORT E02 A49 641 SERVICE PORT E02 938 937 CAPILLARY TUBE O D 0 14 x 1 D 0 09 19 68 E02 939 936 CAPILLARY TUBE O D 0 16 x 1 D 0 11 x 3 93 E02 938 936 CAPILLARY TUBE O D 0 10 x 1 D 0 02 x 39 37 E02 05 299 OIL SEPARATOR 87 a N OO N
22. e Note Leave rear overhead and 5 both sides clearance fully m o 3 gt 9 WIT 22 Unit B Unit inch g1 4 FLARE GAS 3 8 FLARE Grounding terminal Conduit cover 1 lt NS Lock nut Connector 2 Service space to oO amp S Z 2 4 More than she SERVICE SPACE More than 13 25 32 n More than 13 25 32 2 7 7 8 19 11 16 7 7 8 1 3 8 9 27 32 10 5 8 2 U shape notched holes a Base bolt M10 Airin Air inc Li e 5 q Air out Ee tj 1 3 16 18 1 8 Drain hole 3 1 5 16 More than 3 94 in Unit inch REQUIRED SPACE Open as a rule More than 19 69 in if the front and both sides More than 3 94 in More than 7 87 in if there are obstacles to both sides open Gen More than 13 78 in Indoor and outdoor Open as a rule More than 19 69 in if the back both sides and top are open 2 15 32 x 1 13 32 Oval hole Base bolt M10 35 7 16 29 32 Liquid pipe 1 4 flared 23 connect wiring 4 7 8 hole Gas pipe 3 8 flared B C unit 1 2 flar
23. 208 230 V AC Output F64 FUSE T2AL250V MXZ 4A36NA CN901 To electronic control CN902 P C board To power board CN903 To power board CN912 R V coil 208 230 V AG sara Joints C4 5 i 208 230 V AC e Output F65 FUSE T6 3AL250V 208 230 V AC Input 6 3A gt F65 T6 3AL250V 72 3 Outdoor Power board 294 370 V DC Output Red MXZ 2A20NA MXZ 2A20NA 1 MXZ 3A30NA MXZ 3A30NA 1 G00N019 R82 R31 White 294 370 V DC Output Red 0000000000 00 000 6000000990 S608 NI MXZ 2A20NA MXZ 4A36NA Connect to the compressor 7 Voltage among phases 5 V to 180 V Connect to the earth CN2 Connect to the controller board 1 5 Signal transmission To electronic control P C board 5 V DC pulse wave 2 5 Zero cross signal 3 4 Not used 6 5 15 V 7 5 15 V CN3 Fin temperature thermistor RT64 Signal reception From electronic control P C board 5 V DC pulse wave CN5 Primary current detection Connect to the noise filter rn 1 OO OO OO o o o o o of ofo o o o fo ofo e ES Connect to the compressor Voltage among phas
24. Ambient temperature F 51 7 17 class unit in single operation OUTDOOR UNIT MXZ 3A30NA MXZ 3A30NA 1 MXZ 4A36NA 1 COOL operation Data is based on the condition of indoor humidity 50 EADE NRA IEN Air flow speed High How to work fixed frequency operation lnverter output frequency 33 Hz 1 Set emergency switch to COOL or HEAT The switch is locat ed on indoor unit 2 5 emergency run ON OFF button 3 Compressor starts running at 33 Hz COOL or 45 Hz HEAT 4 Indoor fan runs at High speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button or any button on remote controller ent 140 Outdoor low pressure N Outdoor unit current 120 0 0 65 70 75 80 85 90 95 100 105 110 115 F 65 70 75 80 85 90 95 100 105 110 115 F Ambient temperature F Ambient temperature F 2 HEAT operation is based on the condition of outdoor humidity 75 Set air flow to High speed lnverter output frequency is 45 Hz Outdoor unit current A 2 0 15 20 25 30 35 40 45 50 55 60 65 70 75 Ambient temperature F 52 8 24 class unit in single operation OUTDOOR UNIT MXZ 3A30NA 2 1 MXZ 4A36NA 1 COOL operation Data is based on the condition of indoor humidity 50 et LE ME Ai
25. Overcurrent Once Goes out When 28 current flows into intelligent power module Reconnect compressor connector Refer to 11 6 6 to check inverter compressor Check the stop valve 5 time flash Discharge temperature Lighting Lighting When discharge temperature exceeds 240 8 F during operation Compressor can restart if discharge temperature thermistor reads 212 F or less 3 minutes later Check refrigerant circuit and refrigerant amount Refer to 11 6 Check of LEV 6 time flash High pressure Lighting Lighting When high pressure is detected with the high pressure switch HPS during operation MXZ 3A30NA MXZ 3A30NA 11 MXZ 4A36NA When the outdoor heat exchanger temperature exceeds 158 F during cooling or the indoor gas pipe temperature exceeds 158 F during heating Check refrigerant circuit and refrigerant amount Check the stop valve 7 time flash Fin temperature 3 times When the fin temperature exceeds 188 6 F during operation P C board temperature When the P C board temperature exceeds 158 F during operation Check around outdoor unit Check outdoor unit air passage Refer to 11 6 Check of outdoor fan motor 8 time flash Outdoor fan motor Lighting Lighting When failure occurs continuously three times within 30 seconds after the fan gets started Refer to 11 6 6
26. 10 000 32 400 11 400 36 000 2 700 740 2 880 13 38 09 09 15 8 900 32 400 11 400 36 000 2 700 740 2 880 13 38 09 09 17 8 400 32 400 11 400 36 000 2 700 740 2 880 13 38 09 09 24 7 800 32 400 11 400 36 000 2 700 740 2 880 13 38 09 12 12 9 400 32 400 11 400 36 000 2 700 740 2 880 13 38 09 12 15 8 300 32 400 11 400 36 000 12 2 700 740 2 880 13 38 Indoor units combination Heating capacity BTU h Unit B Unit C Unit D Total Power consumption W Current A 208 V 09 12 17 9 900 14 600 32 400 11 400 36 000 2 700 740 2 880 13 38 09 15 15 12 400 12 400 32 400 11 400 36 000 2 700 740 2 880 13 38 09 15 17 11 900 13 300 32 400 11 400 36 000 2 700 740 2 880 13 38 09 17 17 12 700 12 700 32 400 11 400 36 000 2 700 740 2 880 13 38 12 12 12 10 800 10 800 32 400 11 400 36 000 2 700 740 2 880 13 38 12 12 15 9 700 13 000 32 400 11 400 36 000 2 700 740 2 880 13 38 12 12 17 9 300 13 800 32 400 11 400 36 000 2 700 740 2 880 13 38 12 15 15 11 700 11 700 32 400 11 400 36 000 2 700 740 2 880
27. 12 939 233 BACK PANEL E12 939 245 SERVICE PANEL E12 C15 661 BALL VALVE GAS 5 8 E12 C06 662 BALL VALVE LIQUID 318 12 938 959 POWER RECEIVER E12 C18 959 POWER RECEIVER E12 853 640 EXPANSION VALVE E12 819 493 LEV COIL E12 A56 961 4 WAY VALVE E12 819 297 TOP PANEL E12 939 523 REAR GUARD E12 B05 630 HEAT EXCHANGER E12 939 515 MOTOR SUPPORT E12 A49 641 SERVICE PORT E12 938 937 CAPILLARY TUBE 0 D 0 14 x 1 D 0 09 x 19 68 E12 939 936 CAPILLARY TUBE 0 D 0 16 x 1 D 0 11 x 3 93 E12 938 936 CAPILLARY TUBE 0 D 0 10 x 1 D 0 02 x 39 37 12 05 299 SEPARATOR 95 N OO N 5 5 5 5 5 gt _ a N O N 5 5 5 5 5 oa RoHS PARTS LIST RoHS compliant MXZ 2A20NA 2 2 20 7 14 2 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS NS 3 96 PARTS LIST RoHS compliant MXZ 2A20NA MXZ 2A20NA 7 14 2 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Parts No Parts Name Symbol in Wiring Diagram Q ty unit MXZ 2A20NA MXZ 2A20NA4 Remakes E12 851 501 PROPELLER
28. 2 2 Remove the service panel rear panel and pipe cover Photo 1 2 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG 4 Remove the electrical parts Photo 3 5 Detach the welded parts of 4 way valve and pipe Photo 6 Welded parts 4 Removing the expansion valve 1 Remove the top panel Photo 1 2 2 Remove the service panel Photo 1 2 Gas recovery is not required if the unit is pumped down Remove the front panel for removing LEV F Photo 1 Remove the electrical parts for removing LEV F Photo 3 Remove the LEV coils Detach the welded parts of expansion valves and pipes 3 4 5 6 Photo 7 LEV coil F LEV coils Expansion valve F Expansion valves 84 Photo MXZ 3A30NA OPERATING PROCEDURE PHOTOS 5 Removing the reactor 1 Remove the top panel Photo 1 2 2 Disconnect the reactor lead wire 3 Remove the screws of the reactor and remove the reactor Photo 8 Screws of the reactor 85 13 1 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 13 PARTS LIST non RoHS compliant MXZ 2A20NA 19 20 21 10 9 86
29. 24 102 PARTS LIST RoHS compliant MXZ 3A30NA 14 5 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration Parts No Parts Name Symbol in Wiring Diagram Q ty unit MXZ 3A30NA Remakes M21 L2V 232 FRONT PANEL M21 L2V 027 HANDLE ASSEMBLY M21 L2V 010 GRILLE M21 L2V 245 SERVICE PANEL T92 505 801 COMPRESSOR TNB220FMCH M21 L2V 505 COMPRESSOR RUBBER 3 RUBBERS SET M21 L2V 401 EXPANSION VALVE C room M21 L2V 653 LEV COIL C room M21 L2V 401 EXPANSION VALVE B room M21 L2V 652 LEV COIL B room M21 L2V 401 EXPANSION VALVE A room M21 L2V 651 LEV COIL A room M21 L2V 290 BASE ASSEMBLY M21 L2V 644 UNION 112 318 61 4 SET M21 L2V 247 PIPE COVER M21 L2V 667 BALL VALVE LIQUID 3 8 318 T2W L7V 668 BALL VALVE GAS 5 8 518 T2W L7V 248 REAR PANEL T2W L7V 959 POWER RECEIVER T2W L7V 642 4 WAY VALVE M21 L2V 646 HIGH PRESSURE SWITCH 4 8 MPa 48 9 kg cm M21 L2V 402 EXPANSION VALVE E M21 L2V 651 LEV COIL M21 L2V 297 TOP PANEL M21 L2V 523 REAR GUARD
30. Back and side 5553 o WW Drain outlet 3 INDOOR UNITS COMBINATION MXZ 2A20NA MXZ 2A20NA 1 MXZ 2A20NA 2 Indoor units combination Cooling capacity BTU h Unit B Total Power consumption W Current A 208 V 230V 09 9 000 5 400 9 000 730 490 730 3 69 3 34 12 12 000 5 400 12 000 990 490 990 5 01 4 53 15 15 000 5 400 15 000 1 540 490 1 540 7 79 7 05 18 000 7 800 18 000 1 740 630 1 740 8 62 7 80 20 000 7 800 20 000 2 150 630 2 150 10 66 9 64 20 000 7 800 20 000 2 150 630 2 150 10 66 9 64 Indoor units combination 20 000 7 800 20 000 Heating capacity BTU h Unit B Total 2 150 630 2 150 Power consumption W 10 66 9 64 Current A 208 V 230 V Power factor 09 10 900 5 200 15 400 940 480 1 430 4 76 4 30 95 12 13 600 5 200 16 400 1 180 480 1 460 5 97 5 40 95 15 18 000 5 200 21 100 1 720 480 2 100 8 70 7 87 95 21 800 8 500 21 800 1 820 520 1 820 9 02 8 16 97 22 000 8 500 22 000 1 780 520 1 780 8 82 97 22 000 8 500 22 000 1 780 520
31. Clarify the causes by counting time until the inverter stops 0 to 10 seco 10 to 60 sec nds compressor layer short onds compressor lock 60 seconds to 5minutes refrigerant circuit defective 5 minutes or more normal 66 When thermistor is abnormal Check of outdoor thermistors Disconnect the connector in the following table and Abnormal Replace the thermistor except RT64 measure the resistance of the thermistor to check In case that RT64 is abnormal replace the whether the thermistor is normal or not outdoor power board since RT64 is combined with the outdoor power board Normal Reconnect the connector in the following table and disconnect the lead wire leading to the compressor 3 minutes after turning ON the power supply start EMERGENCY OPERATION Replace the outdoor electronic control P C board or the outdoor power board Does the unit operate 10 minutes or more without showing thermistor abnormality Yes Normal Thermistor Symbol Connector Pin No RT61 Between CN661 pin1 and pin2 Discharge temperature Between CN661 pin3 and pin4 Outdoor heat exchanger temperature Between CN661 pin and pin8 Gas pipe temperature Unit A Between CN662 pin1 and pin2 Gas pipe temperature Unit B Between CN662 pin3 and pin4 Gas pipe temperature Unit C Between CN662 pin5 and pin6 Ambient temperature Between CN663 pin1 and pin2 Fin temperature Betw
32. Goes out Lighting Completed Detected successfully Blinking Blinking Blinking Cannot be corrected Other indications Refer to SAFETY PRECAUTIONS WHEN LED FLASHES located behind the service panel Be sure to check for closed valves cracked pipes or clogged pipes 6 Press the switch to cancel LED indication after cancel LED1 Red LED2 Yellow LED3 Green Lighting Lighting Goes out NOTE Indoor unit cannot be operated while this function is activated When this function is activated while indoor unit is operating the operation will be stopped Operate indoor unit after the auto line correcting is finished Pressing the switch during detection cancels this function The record of auto line correcting can be confirmed in the following way Press the switch for more than 5 seconds LED will show the record of auto correcting for about 30 seconds as shown in the table below Number of blinks LED1 Red LED2 Yellow LED3 Green Wiring line Once Once Lighting Not corrected 3 times 3 times Lighting Corrected NOTE Activate this function to confirm the correct wiring after replacing the electronic control P C board Previous records are deleted when the electronic control P C board is replaced The record cannot be shown if auto line correcting is not canceled Refer to How to activate this function 55 1
33. Min circuit ampacity A 19 Fan motor F L A 0 93 Model TNB220FMCH Winding resistance at 68 F U V 0 61 V W 0 61 W U 0 61 R L A 14 4 L R A 15 Refrigerant control LEV Sound level dB A 54 57 Defrost method Reverse cycle W in 35 7 16 Dimensions D in 12 19 32 H in 35 7 16 Weight 150 Remote controller Wireless type Control voltage by built in transformer 12 24 V Refrigerant piping Not supplied optional parts Liquid in 1 4 Gas in A 1 2 B C D 3 8 Indoor Flared Outdoor Flared Refrigerant charge R410A 8 Ib 13 oz Refrigeration oil Model 29 4 NEO22 Power consumption Compressor Valve size Connection method NOTE Test conditions are based on ARI 210 240 3 amp 1 Rating conditions cooling Indoor 80 FDB 67 FWB Outdoor 95 FDB 75 FWB heating Indoor 70 FDB 60 FWB Outdoor 47 FDB 43 FWB 3 2 heating Indoor 70 60 FWB Outdoor 17 FDB 15 FWB 3 3 cooling Indoor 80 FDB 67 FWB Outdoor 82 FDB 65 FWB Unit F Indoor air condition Outdoor air condition Dry bulb Wet bulb Dry bulb Wet bulb Cooling 3 1 A Cooling steady state at rated compressor speed 80 67 95 75 3 3 B 2 Cooling steady state at rated compressor speed 80 67 82 65 B 1 Cooling steady state at minimum compressor speed 80 67 82 65
34. Muffler B Indoor unit lt lt LL l outdoor Ambient heat temperature exchanger thermistor Outdoor heat RT65 4 exchanger temperature thermistor Capillary tube RT68 A O D 0 16 x I D 0 11 x 3 94 Defrost Indoor unit thermistor a SD RT61 Capillary tube Strainer Indoor unit Q Stop valve Strainer Same OD0 12 x LD 0 08 x 11 8 8 Strainer 100 100 Distributor Power D 109 4 receiver e lt _ Des unit 60 eeens emeeed gt Strainer LEV 100 Indoor unit Q D C Strainer LEV D 100 36 Operating Range MXZ 4A36NA Indoor intake air temperature Outdoor intake air temperature Maximum 95 FDB 71 FWB 115 FDB Minimum 67 FDB 57 FWB 14 FDB Heating Maximum 80 FDB 67 FWB 75 FDB 65 FWB Minimum 70 FDB 60 FWB 14 FDB 12 FWB Cooling MAX REFRIGERANT PIPING LENGTH amp PIPE SIZE SELECTION MXZ 4A36NA Piping length each indoor unit a b d 82 ft MAX Total piping length a b c d 230 ft MAX Bending point for each unit 25 MAX Total bending point 70 MAX does not matter which unit is higher Outdoor 49 ft 49 ft Refrigerant pipe diameter is different according to indoor unit to be connected When using extension pipes refer to the tables below When diameter of refrigerant pipe is different from that of outdoor unit union use op
35. a 5 02 5 oa PARTS LIST non RoHS compliant MXZ 2A20NA 13 2 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 88 PARTS LIST non RoHS compliant MXZ 2A20NA 13 2 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS o Parts No Parts Name Symbol in Wiring Diagram Q ty unit MXZ 2A20NA Remakes E02 851 501 PROPELLER E02 A58 301 OUTDOOR FAN MOTOR MF RC0J60 E02 B05 440 POWER BOARD Including heat sink and RT64 E02 05 450 ELECTRONIC CONTROL P C BOARD 202 805 444 NOISE FILTER P C BOARD E02 927 374 TERMINAL BLOCK TB2 3 Indoor unit connecting E02 A53 374 TERMINAL BLOCK TB1 Power supply E02 977 307 GAS PIPE TEMPERATURE THERMISTOR SET RT6A B 1 2 3 4 5 6 7 8 9 202 B05 490 COIL 2154 e E02 938 308 THERMISTOR SET RT61 62 68 DEFROST DISCHARGE OUTDOOR HEAT EXCHANGER E02 938 309 AMBIENT TEMPERATURE THERMISTOR RT65 N E02 938 337 REACTOR L 89 lt 5 5 5 5 5 a 20A 600uH PARTS LIST non RoHS compliant 13 3 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS MXZ 3A30NA 21 22 23 24 LO 12 RARE A ie
36. 02 802 En IS SNL123NN0 8 N LINN Sp OL ga hdi davog H3MOd J N 1912 9x 0689082 YL 114 3SION e 1808 aseud M82 902 4 YMOd Li Tal 28 MXZ 3A30NA 10128002 y30 q o arearpur p L 55 AEL 3414 D v8 SOLON 34 3004 INZOITISINI ioni MERE 7 sassa _ BOSS3HdWOO anti 40151538 7 5 SOSS3HdA0 6UIJTM Plat 103 K uo s1032npuo3 jaddo2 9512 511214185 15153 a viesa 3A WA NOISNVdX3 3 AI TE AWA ISEB HOSTAL EL NJIA 8919 HOLSIS HH a vesu JAWA NOISNVdX3 o Y A31 ADGZ WST ED 3504 104 wesbeiP 2171218 _79 BOISIMH3HI dA3l NIJ POLY SJTIOHINOO H3RO4 Odd BOIOV3H 1 S3WHOJENVHl ININUM YOO 18 0151 3 1 3OHVPOSTO 2919 WELTI ISION 31433818 5 100puT ay noqy T H3WHOJ5NVHL 1081 YOLSIWHSH 1509330 1919 HOLSTHVA VIN 8310N 3 3e
37. 1 1 E12 A58 301 OUTDOOR FAN MOTOR MF 1 1 RCOJ60 E12 B05 440 POWER BOARD 1 Including heat sink and RT64 E12 C15 440 POWER BOARD Including heat sink and RT64 E12 B05 450 ELECTRONIC CONTROL P C BOARD E12 C15 450 ELECTRONIC CONTROL P C BOARD E12 B05 444 NOISE FILTER P C BOARD E12 927 374 TERMINAL BLOCK TB2 3 Indoor unit connecting E12 A53 374 TERMINAL BLOCK TB1 Power supply E12 977 307 GAS PIPE TEMPERATURE THERMISTOR SET RT6A B E12 B05 490 R V COIL 2154 12 938 308 THERMISTOR SET RT61 62 68 DEFROST DISCHARGE OUTDOOR HEAT EXCHANGER E12 938 309 AMBIENT TEMPERATURE THERMISTOR RT65 0 0 0 0 0J 0 000 0 0 0 0 RoHS E12 938 337 REACTOR L 97 20 600 uH MXZ 2A20NA 2 14 3 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 18 19 20 21 KEN zu Sass 9 98 MXZ 2A20NA 2 14 3 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are c
38. 1 SEER 3 Cooling 8 7 16 0 HSPF IV V Heating 10 0 7 5 COP Heating 3 84 External finish Munsell 3 0Y 7 8 1 1 Power supply V phase Hz 208 230 1 60 Max fuse size time delay A 20 Min circuit ampacity A 15 Fan motor F L A 0 93 Model TNB220FMCH Winding resistance at 68 F O U V 0 61 V W 0 61 W U 0 61 RLA 11 L R A 15 Refrigerant control LEV Sound level dB A 49 49 Defrost method Reverse cycle in 35 7 16 Dimensions in 12 19 32 i 35 7 16 Weight MXZ 3A30NA 158 MXZ 3A30NA 148 Remote controller Wireless type Control voltage by built in transformer 12 24 V DC Refrigerant piping Not supplied optional parts Liquid in 1 4 Gas in A 1 2 B C 3 8 Indoor Flared Outdoor Flared Refrigerant charge R410A 7 Ib 11 oz Refrigeration oil Model 29 4 NEO22 Power consumption Compressor Valve size Connection method NOTE Test conditions are based on ARI 210 240 3 amp 1 Rating conditions cooling Indoor 80 FDB 67 FWB Outdoor 95 FDB 75 FWB heating Indoor 70 FDB 60 FWB Outdoor 47 FDB 43 FWB 2 heating Indoor 70 FDB 60 FWB Outdoor 17 FDB 15 FWB 3 cooling Indoor 80 67 FWB Outdoor 82 65 FWB Unit F Indoor air condition Outdoor air condition Dry bulb Wet bulb Dry bulb Wet
39. 5555 sis Z 529 a gt O U SSS 2 50 u ova 5 95 LEAO 10 o E gr 9 19 Se 25 gt gt ED lt gt gt ast T EX gt OS lt TE ZETTE AA 5i Y Orr LLI m e LED 1 LED2 LED 3 SW1 CN603 X Serial signal Room C 12 24 V DC CN801 294 V DC 370 V DG CN602 npu P TS 5AL250V Serial signal Room B F801 y 12 24 V DC FUSE T3 15AL250V s CN601 E 208 230 V AC 5 Input 5 ci mim c Serial signal LS LJ L3 Room A 12424 V DC o of 1 9900 if e e O e8 5 LL nin Na x x 5 VA DOR 555 2 L S S228 4 2 6 6 26 S o o Oo o o b rai a rai aa ees asm afm 258 588 2 Sato lt MXZ 3A30NA 1 MXZ 4A36NA Defrost thermistor RT61 Ambient temperature therm
40. 62 Comp shell bottom temp Ref pipe length Total pipe length for multi system Refrigerant charge R410A Outdoor unit Intake air temperature Fan speed Airflow 40 8 1 OPERATING RANGE 1 POWER SUPPLY Model Rating Guaranteed Voltage MXZ 2A20NA MXZ 2A20NA MXZ 2A20NA Min 198 V 208 V 230 V Max 253 V Outdoor unit MXZ 3A30NA 208 230 V 60 Hz 19 MXZ 3A30NA MXZ 4A36NA 2 OPERATION Intake air Function temperature Condition DB F WB F DB F WB F Cooling steady state at rated compressor speed 2 Cooling steady state at rated compressor speed B 1 Cooling steady state at minimum compressor speed Low ambient cooling steady state at minimum compressor speed Intermediate cooling steady state at intermediate compressor speed Standard rating heating at rated compressor speed Low temperature heating at rated compressor speed Max temperature heating Heating at minimum compressor speed High temperature heating at minimum compressor speed Frost accumulation at rated compressor speed Frost accumulation at intermediate compressor speed Indoor Outdoor 80 67 95 75 80 67 82 65 Cooling 80 67 82 65 80 67 67 53 5 80 67 87 69 70 60 47 43 70 60 17 15 At intermediate compressor speed Cooling rated
41. 920 2 800 12 55 12 17 26 000 12 000 26 000 2 800 920 2 800 12 55 15 15 26 000 12 000 26 000 2 800 920 2 800 12 55 15 17 26 000 12 000 26 000 2 800 920 2 800 12 55 17 17 26 000 12 000 26 000 2 800 920 2 800 12 55 09 09 09 27 000 12 600 27 000 2 860 1 000 2 850 12 82 09 09 12 30 000 12 600 30 000 3 270 1 000 3 270 14 66 09 09 15 32 100 12 600 32 100 3 500 1 000 3 500 15 69 09 09 17 32 100 12 600 32 100 3 500 1 000 3 500 15 69 09 09 24 32 100 12 600 32 100 3 500 1 000 3 500 15 69 09 12 12 32 100 12 600 32 100 14 3 500 1 000 3 500 15 69 Indoor units combination Cooling capacity BTU h Unit C Unit D Total Power consumption W Current A 230 V 09 12 15 13 400 32 100 12 600 32 100 3 500 1 000 3 500 15 69 09 12 17 14 400 32 100 12 600 32 100 3 500 1 000 3 500 15 69 09 15 15 12 300 32 100 12 600 32 100 3 500 1 000 3 500 15 69 09 15 17 13 300 32 100 12 600 32 100 3 500 1 000 3 500 15 69 09 17 17 12 700 32 100 12 600 32 100 3 500 1 000 3 500 15 69 12 12 12 10 700 32 100 12 600 32 100 3 500 1
42. Low ambient cooling steady state at minimum compressor speed 80 67 67 53 5 Intermediate cooling steady state at intermediate compressor speed 80 67 87 69 Heating 1 Standard rating heating at rated compressor speed 70 60 47 43 2 Low temperature heating at rated compressor speed 70 60 17 15 Max temperature heating at minimum compressor speed 70 60 62 56 5 High temperature heating at minimum compressor speed 70 60 47 43 Frost accumulation at rated compressor speed 70 60 35 33 Frost accumulation at intermediate compressor speed 70 60 35 33 At intermediate compressor speed Cooling rated compressor speed minimum compressor speed 3 minimum compressor speed Mode Test 20 5 OUTLINES AND DIMENSIONS MXZ 2A20NA 2 2 20 _ 6 9 16 19 11 16 6 21 32 9 3 16 11 11 32 2 1 2 4 Air in Air inc 9 i o Air out ql 2 KS 31546 4 13 32 13 16 bolt M10 Indoor outdoor a 33 116 1 3 16 _ 329778 hole 1 3 16 More than 3 94 in Unit inch REQUIRED SPACE Open as a rule More than 19 69 in if the front and both sides are open More than 3 94 in More than 7 87 in if there are obstacles to both sides Open as a rule More than 19 69 in if the back bot
43. MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Jun 2008 No Distributed in Oct 2007 No Distributed in May 2007 No Distributed in Jun 2006 No Distributed in Mar 2006 No Made in Japan OB444 REVISED EDITION D 6 OB444 REVISED EDITION C 9 OB444 REVISED EDITION B 9 OB444 REVISED EDITION A 8 OB444 8 New publication effective Jun 2008 Specifications subject to change without notice
44. T2W L7V 630 HEAT EXCHANGER M21 L2V 249 SIDE PANEL T2W L7V 641 SERVICE PORT M21 L2V 937 CAPILLARY TUBE O D 0 16 x 1 D 0 09 x 15 75 M21 L2V 936 CAPILLARY TUBE O D 0 16 x I D 0 11 x 3 54 M21 L2V 938 CAPILLARY TUBE O D 0 10 x 1 D 0 02 x 39 37 0 0 00 000000 0 0 0000000 00000000 0 0 000 RoHS T2W L7V 656 OIL SEPARATOR 103 WININ aljlajaljajajajlaljlalajajajajajalaljlajajajmajaljlalw ialjalalN gt RoHS PARTS LIST RoHS compliant 14 6 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS MXZ 3A30NA 12 104 PARTS LIST RoHS compliant MXZ 3A30NA 14 6 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 9 Parts No Parts Name Symbol in Wiring Diagram Q ty unit MXZ 3A30NA Remakes M21 L2V 501 PROPELLER T2W L7V 301 OUTDOOR FAN MOTOR RC0J60 T2W L7V 440 POWER BOARD Including heat sink and RT64 T2W L7V 451 ELECTRONIC CONTROL P C BOARD M21 L2V 337 REACTOR 20 A 600 uH T2W L7V 424 NOISE FILTER P C BOARD T2W L2V 376 TERMINAL BLOCK TB2 4 Indoor unit connecting T2W L7V 377 TERMINAL BLOCK TB1 Power supply 1 2 3 4 5 6 7 8 9 M21 L7V 307 GAS PIPE TEMPERATURE THERMISTOR RT6A B C T2W L7V 398 R V COIL 21S4 21 L2
45. been changed MXZ 3A30NA MXZ 3A30NA 1 Ball valve has been changed to stop valve 2 Gas pipe temperature thermistor has been removed 3 Pre heat control has been added 4 Auto line correcting function has been added 5 Noise filter P C board has been changed 6 Electronic control P C board has been changed 7 Weight has been changed 158lb gt 148 MXZ 4A36NA New model MXZ 2A20NA 1 gt MXZ 2A20NA N 1 Electronic control P C board has been changed 2 Noise filter P C board has been changed 3 Ball valve has been changed to stop valve 4 Sub panel has been added INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT This room air conditioner adopts HFC refrigerant R410A which never destroys the ozone layer Pay particular attention to the following points though the basic installation procedure is same as that for R22 air conditioners As R410A has working pressure approximate 1 6 times as high as that of R22 some special tools and piping parts materials are required Refer to the table below Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and installation since it is more susceptible to contaminations than R22 For refrigerant piping use clean pressure proof parts materials specifically designed for R410A Refer to 2
46. bulb Cooling 3 1 A Cooling steady state at rated compressor speed 80 67 95 75 3 amp 3 B 2 Cooling steady state at rated compressor speed 80 67 82 65 B 1 Cooling steady state at minimum compressor speed 80 67 82 65 Low ambient cooling steady state at minimum compressor speed 80 67 67 53 5 Intermediate cooling steady state at intermediate compressor speed 80 67 87 69 Heating 1 Standard rating heating at rated compressor speed 70 60 47 43 2 Low temperature heating at rated compressor speed 70 60 17 15 Max temperature heating at minimum compressor speed 70 60 62 56 5 High temperature heating at minimum compressor speed 70 60 47 43 Frost accumulation at rated compressor speed 70 60 35 33 Frost accumulation at intermediate compressor speed 70 60 35 33 At intermediate compressor speed Cooling rated compressor speed minimum compressor speed 3 minimum compressor speed 19 Mode Test Item MXZ 4A36NA Cooling 1 36 000 12 600 36 400 Capacity Heating 47 1 36 000 11 400 41 200 230 V 36 000 11 400 43 000 Heating 17 2 24 600 Cooling 1 3 820 1 000 3 900 Heating 47 1 3 100 740 4 000 230 V 3 100 740 4 350 Heating 17 2 3 340 EER SEER 3 Cooling 9 4 16 0 HSPF IV V Heating 8 5 7 0 COP Heating 3 40 External finish Munsell 3 0Y 7 8 1 1 Power supply V phase Hz 208 230 1 60 Max fuse size time delay A 20
47. coil V Yes Replace the 4 way valve Replace the power P C board or the noise filter P C board When cooling operation does not work 1 Disconnect the lead wire leading to the compressor 2 3 minutes after turning ON the power supply start EMERGENCY OPERATION in COOL mode Is there voltage of 208 230 V AC between pin1 No U and pin 2 at connector CN912 Replace the4 way valve x If the connector CN912 is not connected or R V coil is open voltage es occurs between terminals even when the control is OFF 1 Turn OFF the power supply of the indoor and the outdoor unit and disconnect the connector CN781 2 3 minutes after turning ON the power supply start EMERGENCY OPERATION in COOL mode 15 there voltage of 12 between the connector CN781 pin 5 and pin 3 2 Ne Replace the noise filter P C board 4 Yes Replace the outdoor electronic control P C board 64 When cooling heat exchanger of non operating indoor unit frosts When heating non operating indoor unit get warm Check of LEV Turn ON the power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely Is click click sound heard 2 Yes Or do you feel vibration of LEV coil with your hand Disconnect the connectors ETEN eren CN794 LEV 0 CN795 LEV CN796 LEV Replace the outdoor electronic co
48. compressor speed minimum compressor speed 3 minimum compressor speed 41 MXZ 2A20NA MXZ 2A20NA 1 MXZ 2A20NA 2 MXZ 3A30NA MXZ 3A30NA 11 MXZ 4A36NA The standard specifications apply only to the operation of the air conditioner under normal conditions Since operating conditions vary according to the areas where these units are installed the following information has been pro vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve 1 GUARANTEED VOLTAGE 198 253 V 60 Hz 2 AIR FLOW Air flow should be set at MAX 3 MAIN READINGS 1 Indoor intake air wet bulb temperature FWB 2 Indoor outlet air wet bulb temperature FWB Cooling 3 Outdoor intake air dry bulb temperature FDB 4 Total input W 5 Indoor intake air dry bulb temperature FDB 6 Outdoor intake air wet bulb temperature FWB Heating 7 Total input W Indoor air wet dry bulb temperature difference on the left side of the following chart shows the difference between the indoor intake air wet dry bulb temperature and the indoor outlet air wet dry bulb temperature for your reference at service How to measure the indoor air wet bulb dry bulb temperature difference 1 Attach at least 2 sets of wet and dry bulb thermometers to the indoor air intake as shown in the figure and at least 2 sets of wet and dry bulb thermomete
49. is detected in the thermistor after 5 minutes of compressor start up Lighting 7 times Nonvolatile memory data When the nonvolatile memory data cannot be read properly Replace the outdoor electronic control P C board Lighting 8 times Current sensor Current sensor protection stop is continuously performed twice Replace the power board Gas pipe temperature thermistor When a short or open circuit is detected in the thermistor during iqhti i Gas pipe temperature cooling n Lighting 10 times B MXZ 2A20NA 7 3 Refer to 11 6 Check of outdoor thermistors C MXZ 3A30NA Gas pipe temperature thermistor Communication error When the communication protection stop between boards is Check the connecting wire between outdoor electronic control between P C boards continuously performed twice P C board and power board Zero cross detecting The protection stop of the zero cross detecting circuit is continuously Check the connecting wire among outdoor electronic control circuit performed 10 times board noise filter P C board and power board Lighting 11 times Lighting 12 times Outdoor unit IPM protection When overcurrent is detected after 30 minutes of compressor start up Reconnect compressor connector Refer to 11 6 How to check inverter compressor minutes When overcurrent is detected within 30 minutes of compressor Check
50. lnverter output frequency 33 Hz 1 Set emergency switch to COOL or HEAT The switch is locat on indoor unit 2 Press emergency run ON OFF button 3 starts running at 33 Hz COOL or 45 Hz HEAT 4 Indoor fan runs at High speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button or any button on remote controller aM C Ic E EE u RENE E DS itn m gt Outdoor low pressure N Outdoor unit current 65 70 75 80 85 90 95 100 105 110 115 F 0 05 70 75 80 85 90 95 100 105 110 115 Ambient temperature F Ambient temperature 2 HEAT operation Data is based on the condition of outdoor humidity 75 Set air flow to High speed lnverter output frequency is 45 Hz Outdoor unit current A Ambient temperature F 48 4 09 class unit in single operation OUTDOOR UNIT MXZ 3A30NA MXZ 3A30NA 1 MXZ 4A36NA 1 COOL operation is based on the condition of indoor humidity 50 Tee ed ee ye ee as Air flow speed High How to work fixed frequency operation gt Ginverter output frequency 33 Hz 1 Set emergency switch to COOL or HEAT The switch is locat ed on indoor unit 2 Press emergency run ON OFF button 3 Compressor starts running at 33 Hz COOL or 45 Hz HEAT 4 Indoor fan runs at High speed and continues for 30 minutes 5 To cancel this o
51. space More than 3 15 16 n More than 3 15 16 nector More than 19 11 16 More than NM SERVICE SPACE More than 13 25 32 24 MXZ 4A36NA Unit inch 78 19 11 16 778 9 27 32 10 5 8 _ 1 3 8 2 U Shaped notched hole Ol lt Base bolt M10 S L eo N I s EES Air in D TS 5 Drain hole 3 9 1 5 16 Air out 5 2 15 32 1 13 32 Oval hole 10 3 2 7 8 Punched hole Connect wiring hole 35 7 16 1 3 16 12 19 32 13 32 2 7 8 Knockout Connect wiring hole K Handle Handle Gas pipe 43 8 B C D unit i 15 32 41 2 unit D unit connection C unit connection B unit connection A unit connection Y y 12 1 2 29 32 Liquid pi 3 re 9 14 flared 1 Installation space Note Leave front and both sides clearance fully More than 3 15 16 I More than 19 11 16 Note Leave front and overhead clearance fully Connector Lock nut Conduit cover More than 7 7 8 More than 3 15 16 L v More than13 25 32 2 Service space Note Leave rear overhead and both sides clearance fully More than 3 15 16 NN M
52. terminal Infinity Replace HPS 00 Reconnect CN681 Turn ON the power supply to the indoor and outdoor unit 3 minutes later start EMERGENCY OPERATION Is HPS protection displayed Yes immediately after compressor Replace the electronic control P C board starts D The other cases Indoor unit does not operate different operating models in multi system When you try to run two indoor units simultaneously one for cooling and the other for heating the unit which transmits signal to the outdoor units earlier decides the operation mode When the above situation occurs set all the indoor units to the same mode turn OFF the indoor units and then turn them back ON Though the top of the indoor unit sometimes gets warm this does not mean malfunction The reason is that the refrigerant gas continuously flows into the indoor unit even while it is not operating 68 11 7 Test point diagram and voltage 1 Outdoor electronic control P C board Defrost thermistor RT61 Ambient temperature thermistor RT65 Gas pipe temperature thermistor RT6A 6B 6C Fin temperature Outdoor heat exchanger temperature
53. tester Part temperature 14 F 104 F Color of lead wire Normal WHT RED RED ORN VIW BRN 37 4 53 9 Q BLU Pressure Normal HPS 537 22 PSIG Close 696 5 PSIG 61 11 6 Troubleshooting flow MXZ 2A20NA MXZ 2A20NA 1 MXZ 2A20NA MXZ 3A30NA MXZ 3A30NA 1 MXZ 4A36NA N Outdoor unit does not operate 9 Check of power supply Check the connecting of parts of main power supply circuit Turn ON the power supply Is there voltage of 208 230 V AC in the No power supply terminal block Check the power supply cable Replace the noise filter P C board Replace the reactor Is the output voltage from the noise filter P C board 208 230 V AC Is the input voltage to the power board 208 230 V AC ves 15 the input voltage to the outdoor No Repl th control P C board 294 325 V DC mare ree ee ee Yes Replace the outdoor electronic control P C board 62 When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch Indoor unit does not operate When OPERATION INDICATOR lamp flashes ON and OFF in every 0 5 second Outdoor unit does not operate How to check mis wiring and serial signal error Turn OFF the power supply D Is there
54. the front panel panel 5 Disconnect the compressor lead wire from terminal of compressor U V W 6 Disconnect the outdoor electronic control P C board connectors CN661 CN662 CN663 CN681 CN791 CN792 CN793 CN795 CN931 CN932 Disconnect the noise filter P C board connector CN912 7 Remove the screws of the electrical parts and remove the Photo 2 electrical parts Photo 2 8 Remove the propeller 9 Remove the screws of the separator and remove the separator 10 Remove the sound proof felt 11 Detach the welded parts of the compressor suction and dis Screws charge pipes Photo 3 of the 12 Remove the compressor nuts and remove the compressor oo parts Screws of the front panel Photo 3 LEV coil E Expansion valve E Suction pipe welded part Discharge pipe welded part 80 OPERATING PROCEDURE PHOTOS 2 Removing the fan motor 1 Remove the top panel the service panel and the front panel Photo 1 2 Disconnect the connectors CN931 and CN932 on the outdoor electronic control P C board 3 Remove the propeller 4 Remove the fan motor Photo 4 Screws of the outdoor fan motor Propeller Propeller nut Compressor nuts 3 Removing the 4 way valve 1 Remove the top panel Photo 1 2 Remove the service panel rear panel and pipe cover 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipe
55. 0 EXPANSION VALVE E12 819 493 LEV COIL 99 NM 5 5 5 5 5 gt gt gt N N 5 5 5 05 gt gt MXZ 2A20NA 2 14 4 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 100 MXZ 2A20NA 2 14 4 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 9 Parts No Parts Name Symbol in Wiring Diagram Q ty unit MXZ 2A20NA4 Remakes E12 851 501 PROPELLER E12 A58 301 OUTDOOR FAN MOTOR MF RCOJ60 E12 C15 440 POWER BOARD Including heat sink and RT64 E12 C88 450 ELECTRONIC CONTROL P C BOARD E12 D38 444 NOISE FILTER P C BOARD E12 C92 375 TERMINAL BLOCK TB2 3 Indoor unit connecting E12 A53 374 TERMINAL BLOCK TB1 Power supply E12 B05 490 R V COIL 2154 12 938 308 THERMISTOR SET RT61 62 68 DEFROST DISCHARGE OUTDOOR HEAT EXCHANGER 212 938 309 AMBIENT TEMPERATURE THERMISTOR RT65 0 0 RoHS 12 938 337 REACTOR L 101 5 5 gt gt 20 600 uH RoHS PARTS LIST RoHS compliant 14 5 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS MXZ 3A30NA 21 22 23
56. 0 Cooling 1 2 150 630 2 150 Heating 47 1 1 780 520 1 780 Heating 17 2 1 500 1 500 EER 1 SEER 8 Cooling 9 3 16 0 HSPF IV V Heating 8 5 7 0 COP Heating 3 63 External finish Munsell 5Y 8 1 Power supply V phase Hz 208 230 1 60 Max fuse size time delay A 20 Min circuit ampacity A 15 Fan motor F L A 0 96 MXZ 2A20NA SNB130FPDH1 Model MXZ 2A20NA 1 SNB130FQBH1 MXZ 2A20NA U V 0 45 V W 0 45 W U 0 45 MXZ 2A20NA U V 0 98 V W 0 98 W U 0 98 R L A 10 1 L R A 15 Refrigerant control LEV Sound level dB A 49 51 Defrost method Reverse cycle W in 33 1 16 Dimensions D in 13 H in 27 15 16 Weight 130 Remote controller Wireless type Control voltage by built in transformer 12 24 V DC Refrigerant piping Not supplied optional parts Liquid in 1 4 Gas in A B 3 8 Indoor Flared Outdoor Flared Refrigerant charge R410A 5 Ib 15 oz MXZ 2A20NA 20 3 NEO22 MXZ 2A20NA 23 7 NEO22 Power consumption Compressor Winding resistance at 68 F Valve size Connection method Refrigeration oil Model NOTE Test conditions are based on ARI 210 240 1 Rating conditions cooling Indoor 80 FDB 67 FWB Outdoor 95 FDB 75 FWB heating Indoor 70 FDB 60 FWB Outdoor 47 FDB 43 FWB 3
57. 000 3 500 15 69 12 12 15 12 300 32 100 12 600 32 100 3 500 1 000 3 500 15 69 12 12 17 13 300 32 100 12 600 32 100 3 500 1 000 3 500 15 69 12 15 15 11 500 32 100 12 600 32 100 3 500 1 000 3 500 15 69 09 09 09 09 9 000 36 000 12 600 36 400 3 820 1 000 3 900 16 78 09 09 09 12 8 300 36 000 12 600 36 400 3 820 1 000 3 900 16 78 09 09 09 15 7 700 36 000 12 600 36 400 3 820 1 000 3 900 16 78 09 09 12 12 10 300 36 000 12 600 36 400 15 3 820 1 000 3 900 16 78 Indoor units combination Heating capacity BTU h Unit A Unit B Unit C Unit D Total Power consumption W Current A 230 V 09 10 900 10 900 8 600 15 400 1 100 780 1 520 5 03 12 13 600 13 600 8 600 16 400 1 380 780 1 600 6 32 15 18 000 18 000 8 600 21 100 1 940 780 2 280 8 88 17 20 100 20 100 8 600 21 500 2 240 780 2 300 10 25 24 23 200 23 200 8 600 27 800 2 520 780 3 000 11 53 09 09 10 900 21 800 11 000 31 000 1 700 740 2 560 7 62 09 12 10 900 24 500 11 000 33 000 1 980 740 2 800 8 87 09 15 10 100 27 000 11 000 35 000 2 200 740 2 9
58. 05 70 75 80 85 90 95 100105 110 115 Ambient temperature F Ambient temperature F 2 HEAT operation Data is based on the condition of outdoor humidity 75 Set air flow to High speed lnverter output frequency is 45 Hz Outdoor unit current A Ambient temperature 50 6 15 class unit in single operation OUTDOOR UNIT MXZ 3A30NA 2 1 MXZ 4A36NA 1 COOL operation Data is based on the condition of indoor ey humidity 50 Air flow speed High GInverter output frequency 33 Hz How to work fixed frequency operation 1 Set emergency switch to COOL or HEAT The switch is locat ed on indoor unit 2 Press emergency run ON OFF button 3 Compressor starts running at 33 Hz COOL or 45 Hz HEAT 4 Indoor fan runs at High speed and continues for 30 minutes 5 cancel this operation press emergency run ON OFF button or any button on remote controller A eo 140 Outdoor low pressure N ILT ee Outdoor unit current 120 0 0 65 70 75 80 85 90 95 100 105 110 115 F 65 70 75 80 85 90 95 100 105 110 115 F Ambient temperature F Ambient temperature F 2 HEAT operation is based on the condition of outdoor humidity 75 Set air flow to High speed lnverter output frequency is 45 Hz Outdoor unit current A 2 0 15 20 25 30 35 40 45 50 55 60 65 70 75
59. 13 38 09 09 09 09 9 000 9 000 36 000 11 400 41 200 3 100 740 4 000 15 05 09 09 09 12 8 300 8 300 36 000 11 400 41 200 3 100 740 4 000 15 05 09 09 09 15 7 700 7 700 36 000 11 400 41 200 3 100 740 4 000 15 05 09 09 12 12 7 700 10 300 36 000 11 400 41 200 13 3 100 740 4 000 15 05 MXZ 4A36NA 230 V Cooling capacity BTU h Indoor units combination Unit B Unit C Unit D Total Power consumption W Current A 230 V 09 9 000 7 200 9 000 800 650 800 3 66 12 12 000 7 200 12 000 1 000 650 1 000 4 58 15 15 000 7 200 15 000 1 320 650 1 320 6 04 17 16 200 7 200 16 200 1 480 650 1 480 6 77 24 22 000 7 200 22 000 2 200 650 2 200 10 07 09 09 18 000 12 000 18 000 1 800 920 1 800 8 07 09 12 21 000 12 000 21 000 2 000 920 2 000 8 96 09 15 24 000 12 000 24 000 2 500 920 2 500 11 21 09 17 25 200 12 000 25 200 2 700 920 2 700 12 10 09 24 28 000 12 000 28 000 3 200 920 3 200 14 34 12 12 24 000 12 000 24 000 2 500 920 2 500 11 21 12 15 26 000 12 000 26 000 2 800
60. 2 heating Indoor 70 FDB 60 FWB Outdoor 17 FDB 15 FWB 3 cooling Indoor 80 FDB 67 FWB Outdoor 82 FDB 65 FWB Unit F Indoor air condition Outdoor air condition Dry bulb Wet bulb Dry bulb Wet bulb Cooling 3 1 A Cooling steady state at rated compressor speed 80 67 95 75 3 3 B 2 Cooling steady state at rated compressor speed 80 67 82 65 B 1 Cooling steady state at minimum compressor speed 80 67 82 65 Low ambient cooling steady state at minimum compressor speed 80 67 67 53 5 Intermediate cooling steady state at intermediate compressor speed 80 67 87 69 Heating 1 Standard rating heating at rated compressor speed 70 60 47 43 2 Low temperature heating at rated compressor speed 70 60 17 15 Max temperature heating at minimum compressor speed 70 60 62 56 5 High temperature heating at minimum compressor speed 70 60 47 43 Frost accumulation at rated compressor speed 70 60 35 33 Frost accumulation at intermediate compressor speed 70 60 35 33 At intermediate compressor speed Cooling rated compressor speed minimum compressor speed 3 minimum compressor speed 18 Mode Test Item MXZ 3A30NA MXZ 3A30NA Cooling 1 28 400 12 600 28 400 Capacity Heating 47 1 28 600 11 400 36 000 Heating 17 2 18 800 Cooling 1 3 250 1 000 3 250 Heating 47 1 2 180 740 2 880 Heating 17 2 2 120 EER
61. 2 800 920 2 800 13 88 12 55 17 17 26 000 12 000 26 000 2 800 920 2 800 13 88 12 55 09 09 09 27 000 12 600 27 000 2 860 1 000 2 850 14 18 12 82 09 09 12 28 400 12 600 28 400 3 250 1 000 3 250 16 11 14 57 09 09 15 28 400 12 600 28 400 3 250 1 000 3 250 16 11 14 57 09 09 17 28 400 12 600 28 400 3 250 1 000 3 250 16 11 14 57 Indoor units combination Heating capacity BTU h Unit B Unit C Total Power consumption W Current A 208 V 230 V Power factor 20 09 10 900 8 600 15 400 1 100 780 1 520 5 57 5 03 95 12 13 600 8 600 16 400 1 380 780 1 600 6 98 6 32 95 15 18 000 8 600 21 100 1 940 780 2 280 9 82 8 88 95 17 20 100 8 600 21 500 2 240 780 2 300 11 34 10 25 95 24 23 200 8 600 27 800 2 520 780 3 000 12 75 11 53 95 09 09 21 800 11 000 31 000 1 700 740 2 560 8 43 7 62 97 09 12 24 500 11 000 33 000 1 980 740 2 800 9 81 8 87 97 09 15 27 000 11 000 35 000 2 200 740 2 920 10 90 9 86 97 09 17 27 000 11 000 35 000 2 200 740 2 920 10 90 9 86 97 09 24 27 000 11 000 35 000 1 980
62. 20 9 86 09 17 9 300 27 000 11 000 35 000 2 200 740 2 920 9 86 09 24 7 300 27 000 11 000 35 000 1 980 740 2 740 8 87 12 12 13 500 27 000 11 000 35 000 2 200 740 2 920 9 86 12 15 12 000 27 000 11 000 35 000 2 160 740 2 860 9 68 12 17 11 200 27 000 11 000 35 000 2 140 740 2 860 9 59 15 15 13 500 27 000 11 000 35 000 2 120 740 2 800 9 50 15 17 12 700 27 000 11 000 35 000 2 110 740 2 800 9 46 17 17 13 500 27 000 11 000 35 000 2 100 740 2 800 9 41 09 09 09 10 800 10 800 32 400 11 400 36 000 2 700 740 2 880 12 10 09 09 12 10 000 12 400 32 400 11 400 36 000 2 700 740 2 880 12 10 09 09 15 8 900 14 600 32 400 11 400 36 000 2 700 740 2 880 12 10 09 09 17 8 400 15 600 32 400 11 400 36 000 2 700 740 2 880 12 10 09 09 24 7 800 16 800 32 400 11 400 36 000 2 700 740 2 880 12 10 09 12 12 9 400 11 500 32 400 11 400 36 000 2 700 740 2 880 12 10 09 12 15 8 300 13 700 32 400 11 400 36 000 16 2 700 740 2 880 12 10 Indoor units combination Heating capacity BT
63. 24 V DC CN801 HI CN601 gt CH 9 208 230 V AC n pu Li Input jm Serial signal 0 E oe 12 24 V DC F801 R FUSE lt E T3 15AL250V 2 Di Ps alk CN796 LEV F 5 12V DC pulse wave CN794 NED LEV Room D POL ge LEV Room CN792 o E vm LEV Room B Tode 9 CN681 High pressure switch 70 CN791 LEV Room A 2 Noise filter P C board MXZ 2A20NA MXZ 2A20NA 7 MXZ 3A30NA CN901 To electronic CN902 CN903 control To power To power P C board board board 208 230 V AC Input R V coil 208 230 V AC CN912 208 230 V AC Output 208 230 V AC Output NR64 VARISTOR F64 FUSE F911 FUSE T2AL250V T1AL250V MXZ 2A20NA 27 voo To electronic CN903 control P C board bear CN902 To power board R V coil 208 230 V AC CN912 Prose pross Output 2 250v T2AL250V MW Joints Ce t 6 3A 250V F65 T6 3AL250V tt H 208 230 V Output H i 5 F65 FUSE D T6 3AL250V 43 9 End FUSE T2AL250V 2 1
64. 35 97 Indoor units combination Cooling capacity BTU h Unit C Unit D Total Power consumption W Current A 208 V 09 12 15 13 400 32 100 12 600 32 100 3 500 1 000 3 500 17 35 09 12 17 14 400 32 100 12 600 32 100 3 500 1 000 3 500 17 35 09 15 15 12 300 32 100 12 600 32 100 3 500 1 000 3 500 17 35 09 15 17 13 300 32 100 12 600 32 100 3 500 1 000 3 500 17 35 09 17 17 12 700 32 100 12 600 32 100 3 500 1 000 3 500 17 35 12 12 12 10 700 32 100 12 600 32 100 3 500 1 000 3 500 17 35 12 12 15 12 300 32 100 12 600 32 100 3 500 1 000 3 500 17 35 12 12 17 13 300 32 100 12 600 32 100 3 500 1 000 3 500 17 35 12 15 15 11 500 32 100 12 600 32 100 3 500 1 000 3 500 17 35 09 09 09 09 9 000 36 000 12 600 36 400 3 820 1 000 3 900 18 55 09 09 09 12 8 300 36 000 12 600 36 400 3 820 1 000 3 900 18 55 09 09 09 15 7 700 36 000 12 600 36 400 3 820 1 000 3 900 18 55 09 09 12 12 10 300 36 000 12 600 36 400 11 3 820 1 000 3 900 18 55 Indoor units combination Heating capacity BTU h Unit A Unit B Unit C Unit D Total Power c
65. 55 10 BUIJIM 211 28 AV 139 v9X HOLSIWYSHL WAL 7914 HALI 3SION d N 3WWN H38Od IN39I1131NI YAWHOSSNVUL LNIUHNI zrun ay 0 Jasar GUIJIM 39018 VNIWH3L 7 TEL uOISINN3HI dW31 39BvHOSIO 2919 HOLSTHVA OYUN HOLIMS 3HnsS3ud HOIH EH M3WHOJSNvHI INIUUNI 21132919 OPTS JODPUT Y 1 5 1 1091 YOLSTWYSHL 1504330 1914 HOLOW JW IN3SITT3INI HOLIOVdYO ONIHLOOWS SNL wN NOS TOMS WN os g91H 91 B51H 3 V A31 EELNI T6LN2 984N9 ESINI 99 TRANS EEL 0002 80 E VO 6H 9 INT1IINNOI DIE 9 IOHLNOO 9INOHIO3 13 Qi Mer SHom E 1809 281 oH EN BON LINN oF elete MIS va 1809 Hdl 1489 A0EZ 202 Sen ene 2304 1301 et T9uss M mene 2809 8SPUudT UL 942 TN A0E2 B02 ar94 Sig ST 5 HIMOd 793 1919 I 30 MXZ 4A36NA
66. 6 2 12 class unit in single operation OUTDOOR UNIT MXZ 2A20NA MXZ 2A20NA 1 MXZ 2A20NA 1 COOL operation Data is based on the condition of indoor humidity 50 Air flow speed High lnverter output frequency 33 Hz Outdoor low pressure 120 65 70 75 80 85 90 95 100 105 110 115 F Ambient temperature F 2 HEAT operation Data is based on the condition of outdoor humidity 75 Set air flow to High speed lnverter output frequency is 45 Hz N How to work fixed frequency operation gt 1 Set emergency switch to COOL or HEAT The switch is locat indoor unit 2 Press emergency run ON OFF button 3 starts running at 33 Hz COOL or 45 Hz HEAT 4 Indoor fan runs at High speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button or any button on remote controller prea hoe ea cree ete ole S E eee ok su oe Soe s Su ee ebm Se sed 5 70 75 80 85 90 95 100 105 110 115 F Ambient temperature F Outdoor unit current A Ambient temperature F 47 3 15 class unit in single operation OUTDOOR UNIT MXZ 2A20NA MXZ 2A20NA 1 MXZ 2A20NA 2 1 COOL operation is based on the condition of indoor humidity 50 i QAir flow speed High How to work fixed frequency operation gt
67. 740 2 740 9 81 8 87 97 12 12 27 000 11 000 35 000 2 200 740 2 920 10 90 9 86 97 12 15 27 000 11 000 35 000 2 160 740 2 860 10 71 9 68 97 12 17 27 000 11 000 35 000 2 140 740 2 860 10 61 9 59 97 15 15 27 000 11 000 35 000 2 120 740 2 800 10 51 9 50 97 15 17 27 000 11 000 35 000 2 110 740 2 800 10 46 9 46 97 17 17 27 000 11 000 35 000 2 100 740 2 800 10 41 9 41 97 09 09 09 28 500 11 400 36 000 2 180 740 2 880 10 80 9 77 97 09 09 12 28 600 11 400 36 000 2 180 740 2 880 10 80 9 77 97 09 09 15 28 600 11 400 36 000 2 180 740 2 880 10 80 9 77 97 09 09 17 28 600 11 400 36 000 2 180 740 2 880 10 80 9 77 97 MXZ 4A36NA 208 V Cooling capacity BTU h Indoor units combination Unit B Unit C Unit D Total Power consumption W Current A 208 V Power factor 09 9 000 7 200 9 000 800 650 800 4 05 95 12 12 000 7 200 12 000 1 000 650 1 000 5 06 95 15 15 000 7 200 15 000 1 320 650 1 320 6 68 95 17 16 200 7 200 16 200 1 480 650 1 480 7 49 95 24
68. Changes for the Better MITSUBISHI Revision D ate ELECTRIC om SPLIT TYPE HEAT PUMP AIR CONDITIONERS NOD TA NEL er OUTDOOR UNIT SERVICE MANUAL No OB444 REVISED EDITION D HFC utilized R410A Inverter controlled multi system type Models MXZ 2A20NA MXZ 2A20NA MXZ 2A20NA MXZ 3A30NA MXZ 3A30NA Indoor unit service manual MXZ 4A36NA 52 Series 08450 CONTENTS 1 TECHNICAL CHANGES 2 2 PART NAMES AND FUNCTIONS 6 3 INDOOR UNITS COMBINATION 7 4 SPECIFICATION eerte 18 Im 5 OUTLINES AND DIMENSIONS 21 mm 6 WIRING DIAGRAM 26 7 REFRIGERANT SYSTEM DIAGRAN 32 SADATA 38 9 ACTUATOR CONTROL 54 10 SERVICE FUNCTIONS 54 11 TROUBLESHOOTING 56 E 12 DISASSEMBLY INSTRUCTIONS 74 m 13 PARTS IIS Toe 86 MXZ 2A20NA 14 ROHS PARTS IIS Tz eneen uu u daneen 94 MXZ 2A20NA 1 15 OPTIONAL PARTS 110 The Slim Line This service manual describes technical 5 data of the outdoor units From Mitsubishi Electric RoHS compl
69. FAN OUT thermistor RT68 5 Ambient o temperature thermistor z RT65 Defrost Capillary tube thermistor O D 0 16 x I D 0 11 x 3 93 RT61 Indoor unit A Q AV 9 Capillary tube Strainer LEVA O D 0 14 x I D 0 09 x 19 68 100 Stop valve Strainer 100 Distributor lt receiver lt _ EIRE gt gt Capillary tube O D 0 16 x 1 D 0 11 x 3 93 Indoor unit zi Strainer LEVB 100 32 Operating Range MXZ 2A20NA 2 2 20 Indoor intake air temperature MXZ 2A20NA N Outdoor intake air temperature Maximum 95 FDB 71 FWB 115 FDB Cooling Minimum 67 FDB 57 FWB 14 FDB Maximum 80 FDB 67 FWB 75 FDB 65 FWB Heating Minimum 70 FDB 60 FWB 14 FDB 12 FWB MAX REFRIGERANT PIPING LENGTH amp PIPE SIZE SELECTION MXZ 2A20NA 2 2 20 1 MXZ 2A20NA 2 Piping length each indoor unit a b 82 ft MAX Total piping length a b 164 ft MAX Bending point for each unit 25 MAX Total bending point 60 MAX does not matter which unit is higher indaor units Outdoor 49 ft 49 ft Refrigerant pipe diameter is different according to indoor unit to be connected When using extension pipes refer to the tables below When diameter of refrigerant pipe is different from that of outdoor unit union use optional Diffe
70. J7E 641 SERVICE PORT M21 SJ4 937 CAPILLARY TUBE O D 0 16 x I D 0 09 x 15 75 M21 TKO 936 CAPILLARY TUBE O D 0 16 x I D 0 11 x 3 54 T2W E59 936 CAPILLARY TUBE O D 0 10 x I D 0 02 x 39 37 T2W J7E 656 OIL SEPARATOR 91 N N 5 5 5 5 5 5 gt gt PARTS LIST non RoHS compliant 13 4 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS MXZ 3A30NA 12 92 PARTS LIST non RoHS compliant MXZ 3A30NA 13 4 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Symbol Q ty unit Parts No Parts Name in Wiring Remakes Diagram MXZ 3A30NA o M21 TKO 501 PROPELLER T2W J7E 301 OUTDOOR FAN MOTOR MF T2W J7E 440 POWER BOARD T2W J7E 451 ELECTRONIC CONTROL P C BOARD M21 TKO 337 REACTOR T2W J7E 424 NOISE FILTER P C BOARD T2W YH1 376 TERMINAL BLOCK TB2 4 T2W J7E 376 TERMINAL BLOCK TB1 T2W E88 307 GAS PIPE TEMPERATURE THERMISTOR RT6A B C T2W J7E 398 R V COIL 2184 M21 GOH 308 THERMISTOR SET RT61 62 68 M21 90V 309 AMBIENT TEMPERATURE THERMISTOR RT65 RC0J60 Including heat sink and RT64 20 A 600 uH Indoor unit connecting Power supply 1 2 3 4 5 6 7 8 9 DEFROST DISCHARGE OUTDOOR HEAT EXCHANGER gt Ok gt gt N
71. N MXZ 2A20NA 2 MXZ 3A30NA 1 MXZ 4A36NA 1234 123456 Turn ON the power supply for the air conditioner NOTE Pre heat control will be turned OFF when the breaker is turned OFF 54 10 2 Auto line correcting lt MXZ 3A30NA 1 MXZ 4A36NA gt Outdoor unit has an auto line correcting function which automatically detects and corrects improper wiring or piping Improper wiring or piping can be automatically detected by pressing the piping wiring correction switch SW871 When improper wiring or piping is detected wiring lines are corrected This will be completed in about 10 to 15 minutes How to activate this function 1 Check that outside temperature is above 0 C This function does not work when outside temperature is not above 0 C 2 Check that the stop valves of the liquid pipe and gas pipe are open 3 Check that the wiring between indoor and outdoor unit is correct If the wiring is not correct this function does not work 4 Turn ON the power supply and wait at least 1 minute 5 Press the piping wiring correction switch SW871 on the electronic control P C Do not touch energized parts LED indication during detection LED1 Red LED2 Yellow LED3 Green Lighting Lighting Blinking LED indication after detection LED1 Red LED2 Yellow LED3 Green SW871 board Indication Lighting
72. Refrigerant piping Composition change may occur in R410A since it is a mixed refrigerant When charging charge liquid refrigerant to prevent composition change x Nee Les ea 1 Ozone Depletion Potential based on CFC 11 x2 Global Warming Potential based on CO2 na New Specification Current Specification The incompatible refrigeration oil easily separates from Since refrigerant and refrigeration oil are compatible refrigerant and is in the upper layer inside the suction muffler refrigeration oil goes back to the compressor through the lower position oil back hole Raising position of the oil back hole enables to back the refrigeration oil of the upper layer to flow back to the Compressor compressor Compressor Suction muffler Cil back hole Suction muffler Compressor Refrigeration oil Refrigerant Refrigeration oil Refrigerant Conversion chart of refrigerant temperature and pressure R410A 435 R22 SEEN EG EE Zee mmm 22 4 14 32 50 68 86 104 122 140 F Saturated liquid pressure 1 Tools dedicated for the air conditioner with R410A refrigerant The following tools are required for R410A refrigerant Some R22 tools can be substituted for R410A tools R410A tools Can R22 tools be used Description Gauge manifold high pressures beyond the
73. S2 WST ED 3503 1083 1102 QIONJ105 SNISU3A3H 7510 15 1 dW3I IN3IONV 5919 NOII2310Hd 1109819 99 79019 JAVA NOISNdX3 3 A31 A052 TVE 9103513 594 AV3U HOLSIWUSHL WAL NTS 7918 H3TIOHINOO U3MOd Odd NWA NOISNVdX3 8 V A31 A0S2 We 3503 131 Xo018 18 15 1 dWAL 3OHVHOSIQ 2914 431114 35104 J N 7 W3HHOJSNVEL IN3HUO 1919 YSWYOASNVUL 108 YOLSIWYSH 150833 191 HOISIHVA 7984 310008 H3MOd 1N391I1131NI WdI YSWYOASNVYL 1 AW134 1109 105 19855 151539 7 164 YOLOW NV4 310004 1N3911131NI O 60H HOLIOVdVO ONTHLOOWS 18 AWN 5 AWN 5 AWN 08 AS 5 5 10128UU02 o o o 2019 euruJ8 I 3 5918 919 8Ml v M013 5109055 mn 1 a mn Plat 104 A UO S10 2npuo2 184402 2 W ae 1918 W W BUI2IAJ8S 10 WEIGETP GULIIM 211 28 8 ZIUN 1 0 13431 BUIJIM 211128 8 APIS 100 1 34 1 5310 9 9 9 aS mr ee t S c ETT EE I 1 ieee SS GEND 998 Z6LNI TBLNO 98 038 TELE oriomo of VON LINN 10980 o mg Or o i 1093 201 g 9 A 909 0 TOMINOO 2INOHIO3 sem 55 e 368 e e 4 7 VLEGH 1 1081 266ND 0 60 mi OLNI 1084019 O BEREIT o 1972
74. SEPARATOR 107 5 N a N 5 RoHS PARTS LIST RoHS compliant MXZ 3A30NA 1 MXZ 4A36NA 14 8 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 108 RoHS PARTS LIST RoHS compliant 2 7 14 8 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Parts No MXZ 4A36NA Parts Name Symbol in Wiring Diagram Q ty unit MXZ 3A30NA MXZ 4A36NA Remakes M21 L2V 501 PROPELLER 1 1 T2W L7V 301 OUTDOOR FAN MOTOR 1 PM8H604 M21 0A1 440 POWER BOARD 1 Including heat sink and RT64 T2W 0A6 451 ELECTRONIC CONTROL P C BOARD 1 1 1 T2W 206 451 ELECTRONIC CONTROL P C BOARD M21 L2V 337 REACTOR 20 600 uH M21 0A0 424 NOISE FILTER P C BOARD T2W 0 2 376 TERMINAL BLOCK TB2 5 Indoor unit connecting T2W L7V 377 TERMINAL BLOCK TB1 Power supply T2W L7V 398 R V COIL 2184 M21 L2V 308 THERMISTOR SET RT61 62 68 DEFROST DISCHARGE OUTDOOR HEAT EXCHANGER 2 G G G G G G G G G G G G M21 0A2 309 AMBIENT TEMPERATURE THERMISTOR RT65 109 5 5 gt 15 OPTIONAL PARTS 15 1 DIFFERENT DIAMETER PIPE
75. T gt Capacity lt HEAT gt Total inpu 2 0 2 0 2 0 2 0 1 5 15 15 1 5 1 0 1 0 1 0 1 0 0 5 0 5 0 5 0 5 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz Frequency Frequency Frequency Frequency 3 15 class unit in single operation lt COOL gt Capacity lt COOL gt Total lt HEAT gt Capacity lt HEAT gt Total input 2 0 2 0 2 0 2 0 1 5 1 5 1 5 1 5 1 0 1 0 1 0 1 0 0 5 0 5 0 5 0 5 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz Frequency Frequency Frequency Frequency 44 2 0 15 1 0 0 5 2 0 0 5 2 0 0 5 2 0 0 5 2 0 0 5
76. TROUBLESHOOTING MXZ 2A20NA 2 2 20 7 MXZ 2A20NA 2 MXZ 3A30NA MXZ 3A30NA 7 MXZ 4A36NA 11 1 Cautions on troubleshooting 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for mis wiring 2 Take care of the following during servicing 1 Before servicing the air conditioner be sure to turn off the unit first with the remote controller and then after confirm ing the horizontal vane is closed turn off the breaker and or disconnect the power plug 2 Be sure to turn OFF the power supply before removing the front panel the cabinet the top panel and the electronic control P C board 3 When removing the electrical parts be careful to the residual voltage of smoothing capacitor 4 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 5 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires X 165 Lead wiring Housing point 3 Troubleshooting procedure 1 First check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality To make sure check how many times the abnormality indication is flashing on and off before starting service work 2 If the electronic control P C board seems to be defective check the copper foil pattern for d
77. U h Unit C Unit D Total Power consumption W Current A 230 V Power factor 09 12 17 14 600 32 400 11 400 36 000 2 700 740 2 880 12 10 97 09 15 15 12 400 32 400 11 400 36 000 2 700 740 2 880 12 10 97 09 15 17 13 300 32 400 11 400 36 000 2 700 740 2 880 12 10 97 09 17 17 12 700 32 400 11 400 36 000 2 700 740 2 880 12 10 97 12 12 12 10 800 32 400 11 400 36 000 2 700 740 2 880 12 10 97 12 12 15 13 000 32 400 11 400 36 000 2 700 740 2 880 12 10 97 12 12 17 13 800 32 400 11 400 36 000 2 700 740 2 880 12 10 97 12 15 15 11 700 32 400 11 400 36 000 2 700 740 2 880 12 10 97 09 09 09 09 9 000 36 000 11 400 43 000 3 100 740 4 350 13 61 99 09 09 09 12 8 300 36 000 11 400 43 000 3 100 740 4 350 13 61 99 09 09 09 15 7 700 36 000 11 400 43 000 3 100 740 4 350 13 61 99 09 09 12 12 10 300 36 000 11 400 43 000 17 3 100 740 4 350 13 61 99 4 SPECIFICATION Item MXZ 2A20NA MXZ 2A20NA MXZ 2A20NA Cooling 1 20 000 7 800 20 000 Capacity Heating 47 1 22 000 8 500 22 000 Heating 17 2 14 50
78. V 308 THERMISTOR SET RT61 62 68 DEFROST DISCHARGE OUTDOOR HEAT EXCHANGER N RoHS M21 L2V 309 AMBIENT TEMPERATURE THERMISTOR RT65 105 gt gt gt gt RoHS PARTS LIST RoHS compliant 1 MXZ 4A36NA 14 7 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS MXZ 3A30NA 22 En GERE D C C CZ C C C C WWW 23 24 106 RoHS PARTS LIST RoHS compliant 2 7 14 7 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS MXZ 4A36NA Part numbers that are circled are not shown in the illustration Parts No Parts Name Symbol in Wiring Diagram Q ty unit MXZ MXZ 4A36NA Remakes M21 0 2 232 FRONT PANEL M21 0A2 027 HANDLE ASSEMBLY M21 L2V 010 GRILLE M21 0A2 245 SERVICE PANEL T92 505 801 COMPRESSOR TNB220FMCH M21 L2V 505 COMPRESSOR RUBBER SET 3 RUBBERS SET M21 L2V 401 EXPANSION VALVE D room M21 L2V 654 LEV COIL D room M21 L2V 401 EXPANSION VALVE C room
79. call function OFF None Normal 2 time flash Outdoor power system Lighting Lighting When overcurrent protection stop is continuously performed three times within 1 minute after the compressor gets started or when converter protection stop or bus bar voltage protection stop is continuously performed three times within 3 minutes after start up Check the connection of the compressor connecting wire Refer to 11 6 6 How to check inverter compressor Check the stop valve 3 time flash Discharge temperature thermistor Lighting Once Defrost thermistor Lighting Once Ambient temperature thermistor Lighting Twice Fin temperature thermistor Lighting 3 times P C board temperature hermistor Lighting 4 times Outdoor heat exchanger emperature thermistor Lighting 9 times When thermistor shorts or opens during compressor running Refer to 11 6 Check of outdoor thermistors Replace the outdoor electronic control P C board Gas pipe temperature hermistor A Lighting 10 times Gas pipe temperature hermistor B Lighting 11 times Gas pipe temperature hermistor C Lighting 12 times When a short or open circuit is detected in the thermistor during cooling A B MXZ 2A20NA MXZ 3A30NA MXZ 3A30NA Refer to 11 6 Check of outdoor thermistors 4 time flash
80. door unit lt Distributor CO 2 Strainer LEVC 100 MXZ 3A30NA 7 Unit mm Service port Service 7 R V coil 4 port Discharge OFF gt Refrigerant flow in cooling ae H ON gt Refrigerant flow in heating SWI Oil separator Capillary tube O D 0 10 x I D 0 02 x 39 37 Indoor unit Stop valve with service port 4 way valve CET Indoor unit Zes eee ie B Indoor unit A Outdoor Ambient heat temperature exchanger thermistor Outdoor heat RT65 exchanger temperature thermistor Capillary tube RT68 O D 0 16 x I D 0 11 x 3 94 Defrost thermistor RT61 ue Capillary tube Strainer Strainer O D 0 12 x I D 0 08 x 11 8 Indoor unit 100 100 Distributor WK Strainer LEVB fo SE SS gt 100 Indoor unit Strainer LEV 100 34 Operating Range MXZ 3A30NA MXZ 3A30NA Indoor intake air temperature E Outdoor intake air temperature Cooling Maximum 95 FDB 71 FWB 115 FDB Minimum 67 F DB 57 FWB 14 FDB Heating Maximum 80 F DB 67 F WB 75 FDB 65 FWB Minimum 70 FDB 60 FWB 14 FDB 12 FWB MAX REFRIGERANT PIPING LENGTH amp PIPE SIZE SELECTION MXZ 3A30NA MXZ 3A30NA Piping length each indoor unit a b c 82 ft MAX Total piping length 0 230 ft MAX B
81. e electronic control P C board 1 Remove the screws of the sub panel 2 Remove the sub panel 3 Disconnect all connectors and lead wires on the electronic control P C board 4 Remove the electronic control P C board 77 Photo 1 Screws of the top panel Screws of service panel Screws of the cabinet 77 of the cabinet Photo 2 Screws of the sub panel Screws of the cabinet Screws of the top panel gt lt a _ SEL Screws of the cabinet OPERATING PROCEDURE PHOTOS Photo 5 R V coil 4 way valve LEV coil E Expansion valve E Suction pipe welded part Discharge pipe welded part Compressor nuts 3 Removing the fan motor 1 Remove the top panel the service panel and the cabinet Photo 1 2 2 Disconnect the connector CN931 and CN932 on the outdoor electronic control P C board 3 Remove the propeller 4 Remove the fan motor Photo 3 Screws of the back panel Screws of the back panel Screw of the Photo 4 back panel Screws of p the electrical parts Photo 6 Screws of the outdoor fan motor Propeller nut Propeller Separator felt 78 OPERATING PROCEDURE PHOTOS 4 Removing the 4 way valve 1 Remove the top panel Photo 1 2 Remove the service panel the cabinet and the back panel Photo 1 2 3 3 Recover gas from the refri
82. ed A unit 3 25 32 2 uni C unit connection B unit connection g rii A unit connection MXZ 3A30NA 1 Unit inch T TI8 19 11 16 in 7 TI8 9 27 32 i 10 5 8 2 U Shaped notched hole z Base bolt M10 8 LO Air in gt Drain hole 3 1 5 16 9 Air out S 2 15 32 x 1 13 32 Oval hole Base bolt M10 3 47 8 Punched hole Connect wiring hole 1 3 16 12 19 32 13 32 35 716 gt 2 7 8 Knockout I Handle Connect wiring hole Handle a 9 P Gas pipe to 3 8 B C unit Y 3 15 32 1 2 A unit LO Lib C unit connection al A E X J B unit connection h b unit connection 12 1 2 29 32 Liquid pipe 8 1 4 flared 1 Installation space Note Leave front and both sides 5 clearance fully More than 3 15 16 E Note Leave front and overhead clearance fully E o o z More than 3 15 16 Con Lock nut Conduit cover Note Leave rear overhead and both sides clearance fully More than 19 11 16 More than13 25 32 2 Service
83. een pin1 and pin2 Outdoor power board Except MXZ 2A20NA 1 MXZ 2A20NA 2 MXZ 3A30NA 1 and MXZ 4A36NA Fan motor does not operate or stops operating shortly after starting the operation Outdoor electronic control P C board Check of outdoor fan motor Check the connection between the connectors CN931 and CN932 Is the resistance between each terminal Yes of outdoor fan motor normal Disconnect CN932 from outdoor electronic control P C board turn ON the power supply Rotate the outdoor fan motor manually and measure the voltage of CN931 Between OQ and Between Q and Between and Fixed to either 5 V or 0 VDC No Does the voltage between each terminal become 5 V DC and 0 V DC repeatedly Yes motor rotate smoothly Does the outdoor fan v Yes Replace the outdoor electronic control P C board 67 Replace the outdoor DC fan motor When the operation frequency does not go up from lowest frequency Check of HPS MXZ 3A30NA MXZ 3A30NA 1 MXZ 4A36NA 1 Disconnect the connector CN681 in the electronic control P C board 2 Check the resistance of HPS after 1 minute has passed since the outdoor unit power supply was turned OFF Check the resistance between each
84. el 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG 4 Remove the screws of the cabinet and remove the cabinet 5 the screws of the back panel and remove the back panel Photo 3 6 Disconnect the compressor lead wire from terminal of the compressor U V W 7 Disconnect the outdoor electronic control P C board connectors CN661 CN662 MXZ 2A20NA CN663 CN791 CN792 CN795 CN931 CN932 Disconnect the noise filter P C board connector CN912 8 Remove the screws of the electrical parts and remove the electrical parts Photo 4 9 Remove the propeller 10 Remove the screws of the separator and remove the separator Photo 6 11 Remove the sound proof felt Photo 6 12 Detach the welded parts of the compressor suction and dis charge pipes Photo 5 13 Remove the compressor nuts and remove the compressor Photo 1 Screws of the top panel Screws of the cabinet service panel Screw of 4 the cabinet Screws of the cabinet Photo 2 Screws of the Screws of the cabinet top panel gt Cm DULL LLN HUM TTT LLL Screws of the cabinet 74 OPERATING PROCEDURE PHOTOS Photo 3 Screw of the rear guard Screws of the back Photo 5 R V coil 4 way valve Screws of LEV coil E the back panel Expansion valve E Screws of Discharge the back panel pi
85. emove the service panel cabinet back panel and the relay panel 3 Disconnect the reactor lead wire from the terminal of the reactor 4 Remove the screws of the reactor and remove the reactor Photo 9 76 Photo 9 Screws of the reactor N 12 2 MXZ 2A20NA OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1 Removing the compressor 1 Remove the screws of the top panel and remove the top panel 2 Remove the screws of the service panel and remove the service panel 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG 4 Remove the screws of the cabinet and remove the cabinet 5 Remove the screws of the back panel and remove the back panel Photo 3 6 Disconnect the compressor lead wire from terminal of the compressor U V W 7 Disconnect the outdoor electronic control P C board connectors CN661 CN663 CN791 CN792 CN795 CN931 CN932 Disconnect the noise filter P C board connector CN912 8 Remove the screws of the electrical parts and remove the electrical parts Photo 4 9 Remove the propeller 10 Remove the screws of the separator and remove the separator Photo 6 11 Remove the sound proof felt Photo 6 12 Detach the welded parts of the compressor suction and dis charge pipes Photo 5 13 Remove the compressor nuts and remove the compressor 2 Removing th
86. ending point for each unit 25 MAX Total bending point 70 MAX does not matter which unit is higher Outdoor 33 ft unit 49 ft MXZ 3A30NA 2 33 ft 2 49 ft 2 Refrigerant pipe diameter is different according to indoor unit to be connected When using extension pipes refer to the tables below When diameter of refrigerant pipe is different from that of outdoor unit union use optional Different diameter pipe For further information on Different diameter pipe see 15 1 Indoor unit class Extension pipe diameter Liquid 1 4 09 Gas 3 8 Liquid 1 4 12 Gas 3 8 Liquid 1 4 15 Gas 1 2 Liquid 1 4 17 Gas 1 2 Liquid 1 4 24 Gas 5 8 Unit inch Outdoor unit union diameter For 1 4 Indoor unit A Gas 1 2 Liquid 1 4 Indoor unit B Gas 3 8 Liquid 1 4 Indoor unit Gas 3 8 35 MXZ 4A36NA Unit mm Service port lt Service Compressor R V coil pot 4 Discharge OFF Refrigerant flow in cooling DISSI D ON gt Refrigerant flow in heating SE Oil separator J d Capillary tube O D 0 10 x 10 0 02 x 39 37 D Stop valve Indoor unit with service port X 4 way valve C avt O Esen PS Indoor unit
87. es 5 V to 180 V Connect to the earth CN2 Connect to the controller board 1 5 Signal transmission To electronic control P C board 5 V DC pulse wave Wat 2 5 Zero cross signal 3 4 Not used 6 5 15 V 7 5 15 V CNS3 Fin temperature thermistor RT64 00000000 IND 00000000020 0000000000 Signal reception From electronic control P C board 5 V DC pulse wave CN5 Primary current detection Connect to the noise filter 12 DISASSEMBLY INSTRUCTIONS Terminal with locking mechanism Detaching points The terminal which has the locking mechanism can be detached as shown below There are two types Refer to 1 and 2 of the terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out Check the shape of the terminal before detaching 1 Slide the sleeve and check if there is a locking lever or not Sleeve Slide the sleeve pushing the locking Pull the terminal while 2 The terminal with this connector has the locking mechanism Hold the sleeve and pull out the terminal Locking lever slowly lever Connector 12 1 MXZ 2A20NA MXZ 2A20NA 7 OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1 Removing the compressor 1 Remove the screws of the top panel and remove the top panel 2 Remove the screws of the service panel and remove the service pan
88. from terminal of compressor U V W 7 Disconnect the outdoor electronic control P C board connectors CN661 CN663 CN681 CN791 CN792 CN793 CN794 MXZ 4A36NA CN796 CN931 CN932 Disconnect the noise filter P C board connector CN912 8 Remove the screws of the electrical parts and remove the electrical parts 9 Remove the propeller 10 Remove the screws of the separator and remove the separator 11 Remove the sound proof felt Photo 5 12 Detach the welded parts of the compressor suction and dis charge pipes Photo 4 13 Remove the compressor nuts and remove the compressor Photo 4 Suction pipe welded part Discharge pipe welded part Photo 1 Screws of the top panel Screws of service panel Screws of the front panel o Photo 2 Screws of the top panel Screws of the side panel Screws of the service panel Screws of the rear panel Photo 3 Screws of the electrical parts 83 Photo MXZ 3A30NA OPERATING PROCEDURE 2 Removing the fan motor 1 Remove the top panel the service panel and the front panel Photo 1 2 2 Disconnect the connectors CN931 and CN932 on the outdoor electronic control P C board 3 Remove the propeller 4 Remove the fan motor Propeller Propeller nut Separator PHOTOS Photo 5 Screws of the outdoor fan motor 3 Removing the 4 way valve 1 Remove the top panel Photo 1
89. ge of the wire indoor outdoor either the Confirmation of power voltage intermediate connection poor connecting wire contact to the terminal block unit or the No light each Is serial signal other away Yes error indicated Attach a filter No 6 minutes later on remote control receiving section of Be sure to release the failure mode the indoor recall function after checking B unit 1 Refer to indoor unit service manual 63 The cooling operation or heating operation does not operate Check of R V coil CN912 Noise filter P C board Outdoor electronic control P C board When heating operation does not work 1 Disconnect the lead wire leading to the compressor 2 3 minutes after turning ON the power supply start EMERGENCY OPERATION in HEAT mode Is there voltage of 208 230 V AC between pin1 No 1 Turn OFF the power supply of indoor and outdoor unit and and pin 2 at connector CN912 gt disconnect the connector CN781 2 3 minutes after turning ON the power supply start es EMERGENCY OPERATION in HEAT mode Turn OFF the power supply of indoor and outdoor unit Y Is there voltage of 12 V DC between the connector Replace the outdoor CN781 pin 5 and pin 3 2 electronic control P C board Disconnect the connector CN912 Is there normal Noy Replace the R V coil resistance to R V
90. gerant circuit NOTE Recover gas from the pipes until the pressure gauge shows PSIG 4 Remove the electrical parts Photo 4 5 Detach the welded parts of 4 way valve and pipe Photo 7 Photo 7 R V coil 5 Removing the expansion valve 1 Remove the top panel Photo 1 2 Remove the service panel the cabinet and the back panel Photo 1 2 3 Gas recovery is not required if the unit is pumped down 3 Remove the electrical parts for removing LEV E Photo 4 5 4 Remove the LEV coils 5 Detach the welded parts of expansion valves and pipes Photo 8 LEV coils 6 Removing the reactor 1 Remove the top panel Photo 1 2 Remove the service panel cabinet back panel and the electrical parts Photo 1 2 3 4 3 Disconnect the reactor lead wire from the terminal of the reactor 4 Remove the screws of the reactor and remove the reactor Photo 9 Photo 9 Screws of the reactor 79 12 3 MXZ 3A30NA OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1 Removing the compressor Photo 1 1 Remove the screws of the top panel and remove the top Screws of the top panel panel Photo 1 2 Remove the screws of the service panel and remove the service panel Photo 1 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge Screws of shows 0 PSIG HMH service 4 Remove the screws of the front panel and remove
91. h sides and top are open More than 13 78 in x 1 3 16 27 15 16 14 3 16 11 3 4 Gas pipe 3 8 flared both A amp B unit B unit connection _ Aunit connection 2 5 8 Liquid pipe 1 4 flared both A amp B unit 21 Grounding terminal Conduit cover Bolt Pitch 4 13 32 x13 16 Oval Hole MXZ 2A20NA 2 6 9 16 19 11 16 6 21 32 gt gt 2 1 2 9 3 16 11 11 32 i gt lt N Rear Air Intake e e Side Air Intake gt 3 1 5 16 Drain Hole Air Discharge Foundation Bolt M 33 1 16 1 3 16 10 1 3 16 1 2 H 14 3 16 Y 3 7 8 Punched holes Connecting wire hole e TE GAS T LIQ GAS 1 Installation space Note Leave front and both sides clearance fully Note Leave front and overhead clearance fully More than 19 11 16 More than 3 15 16 E 5 than 3 15 16 More than13 25 32
92. iant products have G mark mL mi TM on the spec name plate C For servicing of RoHS compliant products Us Us refer to the RoHS Parts List a 53 e IST 9700058 332 Revision A RoHS PARTS LIST has been added Revision B MXZ 2A20NA 1j and MXZ 3A30NA 1 have been added Revision MXZ 4A36NA has been added Revision D MXZ 2A20NA 2 has been added 1 TECHNICAL CHANGES MXZ 2A20NA New model MXZ 30TN2 gt MXZ 3A30NA Combinations of connectable indoor units have been increased Capacity class of connectable indoor units have been made larger Compressor has been changed THV247FBA gt TNB220FMCH Outdoor fan motor has been changed RA6N60 AA gt RC0J60 AB Refrigerant has been changed R22 gt R410A Refrigerant system diagram has been changed 1 of 2 high pressure switch has been removed Accumulator has been removed Receiver has been added 7 Communication system has been changed 8 Power supply way has been changed change to supply to outdoor unit 9 Evaporation temperature thermistor has been added 10 Ambient temperature thermistor has been added MXZ 2A20NA MXZ 2A20NA 1 Compressor has been changed SNB130FPDH1 gt SNB130FQBH1 2 Gas pipe temperature thermistor has been removed 3 Pre heat control has been added 4 Electronic control P C board has been changed 5 Power board has
93. ilure occurs continuously three times within 30 seconds after imes oes utdoor fan motor the fan gets started Replace the power board Goes ou Replace the power board Refer to 11 6 Check of outdoor fan motor Current sensor When a short or open circuit is detected in the current sensor during protection compressor operating Communication between P C Communication error occurs between the outdoor electronic control P C Check the connecting wire between outdoor electronic control boards protection board and power board for more than 10 seconds P C board and power board Zero cross detecting circuit When zero cross signal cannot be detected while the compressor is Check the connecting wire among outdoor electronic control protection operating P C board noise filter P C board and power board Lighting 8 times Replace the power board Lighting 11 times Lighting 12 times Outdoor electronic control P C board Parts side NOTE 1 The location of LED is illustrated at the right figure Refer to 11 7 1 MXZ 2A20NA MXZ 2A20NA 1 MXZ 2A20NA 2 2 LED is lighted during normal operation MXZ 3A30NA LED2LED1 The flashing frequency shows the number of times the LED blinks after every 2 5 second OFF Lighting e e Example When the flashing frequency is 2 sf 0 5 second ON 0 5 second ON MXZ 3A30NA 1 MXZ 4A36NA
94. ircled are not shown in the illustration Parts No Parts Name Symbol in Wiring Diagram Q ty unit MXZ 2A20NA4 Remakes E12 D36 232 CABINET E12 817 009 HANDLE E12 939 521 GRILLE E12 D36 246 SUB PANEL E12 C15 900 COMPRESSOR SNB130FQBH1 E12 C34 506 COMPRESSOR RUBBER SET 3 RUBBERS SET E12 851 640 EXPANSION VALVE B room E12 939 493 LEV COIL B room E12 851 640 EXPANSION VALVE A room E12 938 493 LEV COIL A room E12 939 290 BASE E12 D36 666 UNION GAS 318 12 036 667 UNION LIQUID 4 12 939 233 12 036 245 SERVICE PANEL E12 D36 662 STOP VALVE LIQUID 3 8 23 8 E12 C88 661 STOP VALVE GAS 5 8 5 8 E12 C88 299 OIL SEPARATOR E12 A56 961 4 WAY VALVE E12 819 297 TOP PANEL E12 939 523 REAR GUARD E12 B05 630 OUTDOOR HEAT EXCHANGER E12 939 515 MOTOR SUPPORT E12 A49 641 SERVICE PORT E12 938 937 CAPILLARY TUBE O D 0 14 x I D 0 09 x 19 68 E12 939 936 CAPILLARY TUBE O D 0 16 x I D 0 11 x 3 93 E12 938 936 CAPILLARY TUBE O D 0 10 x I D 0 02 x 39 37 E12 C18 959 POWER RECEIVER 19 20 21 22 03 29 12 853 64
95. isconnection and the com ponents for bursting and discoloration 3 When troubleshooting refer to 11 2 and 11 3 and 11 4 11 2 Failure mode recall function This air conditioner can memorize the abnormal condition which has occurred once Even though LED indication listed on the troubleshooting check table 11 4 disappears the memorized failure details can be recalled This mode is very useful when the unit needs to be repaired for the abnormality which doesn t recur 1 Type of failure mode recall function There are 2 types in failure mode recall function as shown below Indoor and outdoor unit failure mode recall function With this function failure mode of indoor unit and a part of failure mode of outdoor unit can be recalled The details of outdoor unit failure mode recall function With this function more detailed failure mode of outdoor unit can be recalled Refer to the service manual of indoor unit for how to recall the failure mode and the details of indoor unit failure mode The outdoor unit failure mode is indicated by the operation indicator lamp on the indoor unit and the LED of outdoor unit See 11 2 2 Outdoor unit failure mode table 56 2 Outdoor unit failure mode table The left lamp of OPERATION INDICATOR lamp Indoor unit Abnormal point Failure mode protection LED indication Outdoor P C board LED 1 LED 2 Condition Correspondence Indoor outdoor unit failure mode re
96. istor RT65 Fin temperature thermistor RT64 Outdoor heat exchanger temperature thermistor RT68 200 100 Discharge temperature thermistor RT62 Resistance 0 0 10 20 30 40 50 60 70 80 90 100 120 Temperature C 180 LED 1 LED 2 90 160 pe 80 8 120 87 S 100 S 60 e 2 9 8 50 0 60 x E 20 30 Z 32 50 68 86 104 122 140 158 176 20 s T F 10 e o 0 5 E 5 a 4 14 32 50 68 86 104 LIE Z e Temperature F 955 9 2 8 s 2 co 55282 9 EN 050 50 235 ge ACE oo 2 ec 089 um 2525 289 059 9 lt 59 482 O28 5 5 0 3 200 CODE HEA E Seca a Do gt o9 0 lt lt tio sl LED 3 F931 FUSE CN631 T3 15AL250V Serial signal Room D 12 24 V DC BORD oF DJ 888 ET ge UD T isi CN621 1 ay B Serial signal Room C pue Pc 1 12 24 SW871 NEN CN gese t 2 Ge CN611 gt Serial signal Room B 12
97. measurement range of existing Charge hose Hose material has been changed to improve the pressure resistance Gas leak detector Dedicated for HFC refrigerant Torque wrench Flare tool Clamp bar hole has been enlarged to reinforce the spring strength in the tool Flare gauge m Provided for flaring work to be used with R22 flare tool Vacuum pump Provided to prevent the back flow of oil This adapter enables you to use adapter vacuum pumps Electronic scale for refrigerant charging It is difficult to measure with a charging cylinder because the refrigerant bubbles due to high pressure and high speed vaporization No Not Substitutable for R410A Yes Substitutable for RA10A 2 Refrigerant piping Specifications Use the copper or copper alloy seamless pipes for refrigerant that meet the following specifications Outside diameter Wall thickness Insulation material inch inch Heat resisting foam plastic Specific gravity 0 045 Thickness 0 315 inch Flaring work and flare nut Flaring work for R410A pipe differs from that for R22 pipe For details of flaring work refer to installation manual FLARING WORK Pipe di t Dimension of flare nut ipe diameter mm inch inch net R2 2 3 Refrigeration Apply the special refrigeration oil accessories packed with indoor unit to the flare and the union seat surfaces 4 Air purge Do not discharge the ref
98. mistor Control Outdoor heat exchanger temperature Protection Capacity code Control 10 SERVICE FUNCTIONS 10 1 Pre heat control MXZ 2A20NA 7 MXZ 2A20NA 2 MXZ 3A30NA 11 MXZ 4A36NA gt If moisture gets into the refrigerant cycle or when refrigerant is liquefied and collected in the compressor it may interfere the start up of the compressor To improve start up condition the compressor is energized even while it is not operating This is to generate heat at the winding The compressor uses about 50 W when pre heat control is turned ON Pre heat control is ON at initial setting How to deactivate pre heat control Turn OFF the power supply for the air conditioner before making the setting Set the 4th DIE Switch of SW1 on the outdoor electronic control P C board to ON to deactivate pre heat control func tion MXZ 2A20NA 1 MXZ 2A20NA 2 Set the 4th Dip Switch of SW2 on the outdoor electronic control P C board to ON to deactivate pre heat control func tion 2 11 MXZ 4A36NA e DE B H D RES ah 0 gt Km meer SW1 MXZ 2A20NA D O
99. ntrol P C board Is there normal resistance to LEV coil 2 No Replace LEV coil 65 When heating room When cooling room does not get warm does not get cool How to check inverter compressor x1 After the outdoor fan starts running wait for 1 minute Disconnect the terminal of the compressor 3 minutes after turning ON the power supply start EMERGENCY OPERATION Measure the voltage U BLK V WHT V WHT W RED W RED U BLK Output voltage COOL 150 V 48 Hz lead wire leading to the compressor Is voltage output 2 X1 x2 or more before measuring the voltage The output voltage values have the tolerance of 20 X2 output differs depending on the capacity or the No number of indoor units to be operated between each HEAT 170 V 64 Hz Is output balanced outdoor unit terminals Is the input voltage to the outdoor electronic No control P C board 370 V or more Turn OFF the power supply of indoor and winding resistance between the compressor Is the resistance between each terminal normal No Yes Replace the power board and measure the compressor Replace the Reconnect t Tres compressor he lead wire of compressor and turn ON the power supply to indoor and outdoor unit 3 minutes la ter start EMERGENCY OPERATION
100. onsumption W Current A 208 V 09 10 900 10 900 8 600 15 400 1 100 780 1 520 5 57 12 13 600 13 600 8 600 16 400 1 380 780 1 600 6 98 15 18 000 18 000 8 600 21 100 1 940 780 2 280 9 82 17 20 100 20 100 8 600 21 500 2 240 780 2 300 11 34 24 23 200 23 200 8 600 27 800 2 520 780 3 000 12 75 09 09 10 900 21 800 11 000 31 000 1 700 740 2 560 8 43 09 12 10 900 24 500 11 000 33 000 1 980 740 2 800 9 81 09 15 10 100 27 000 11 000 35 000 2 200 740 2 920 10 90 09 17 9 300 27 000 11 000 35 000 2 200 740 2 920 10 90 09 24 7 300 27 000 11 000 35 000 1 980 740 2 740 9 81 12 12 13 500 27 000 11 000 35 000 2 200 740 2 920 10 90 12 15 12 000 27 000 11 000 35 000 2 160 740 2 860 10 71 12 17 11 200 27 000 11 000 35 000 2 140 740 2 860 10 61 15 15 13 500 27 000 11 000 35 000 2 120 740 2 800 10 51 15 17 12 700 27 000 11 000 35 000 2 110 740 2 800 10 46 17 17 13 500 27 000 11 000 35 000 2 100 740 2 800 10 41 09 09 09 10 800 32 400 11 400 36 000 2 700 740 2 880 13 38 09 09 12
101. oor unit current 1 09 class unit in single operation OUTDOOR UNIT 2 2 20 2 2 20 7 MXZ 2A20NA 2 1 COOL operation Data is based on the condition of indoor humidity 50 Air flow speed High lnverter output frequency 33 Hz PSIG Outdoor low pressure 120 Ambient temperature F 2 HEAT operation is based on the condition of indoor humidity 75 Set air flow to High speed lnverter output frequency is 45 Hz How to work fixed frequency operation 1 Set emergency switch to COOL or HEAT The switch is locat indoor unit 2 Press emergency run ON OFF button 3 Compressor starts running at 33 Hz COOL or 45 Hz HEAT 4 Indoor fan runs at High speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button or any button on remote controller aen ES Sa is gt El 3 0 E Es ER pr us c 5 wi 3 o 5 o o 5 ixi Sa ss shi 0 0 65 70 75 80 85 90 95 100 105 110 115 CF 65 70 75 80 85 90 95 100 105 110 115 F Ambient temperature F o Outdoor unit current 5 20 25 30 35 40 45 50 55 60 65 70 75 F Ambient temperature F 4
102. op is continuously performed twice Replace the power board Zero cross detecting circuit 5 times When zero cross signal cannot be detected while the compressor is operating The protection stop of the zero cross detecting circuit is continuously performed 10 times Check the connecting wire among electronic control P C board noise filter P C board and power board Converter When a failure is detected in the operation of the converter during operation 1 Bus bar voltage When the bus bar voltage exceeds 400V or falls to 200V or below during compressor operating 2 Bus bar voltage Even if this protection stop is performed continuously three times it does not mean the abnormality in outdoor power system When the bus bar voltage exceeds 400V or falls to 50 or below during compressor operating Replace the power board 15 time flash LEV for drain Lighting Lighting When the indoor unit detects any abnormal in the LEV for drain Refer to 11 6 Check of LEV Check the drain pump of the indoor unit NOTE Blinking patterns of this mode differ from the ones of Troubleshooting check table 11 4 11 3 Instruction of troubleshooting Check the indoor unit with referring to the indoor unit service manual and confirm that there is any problem in the indoor unit Then check the outdoor unit with referring to
103. ore than 19 11 16 effi than 19 11 16 More than sisne More than 13 25 32 SERVICE SPACE More than 13 25 32 3 __ 4 25 WIRING DIAGRAM 6 MXZ 2A20NA HOISINH3HI 4 1 INZIEN S91H HOLOV3 H3MOd Odd H3MOd 1N39T TI31NI YOLSIWYSHL 1 NIJ v91U 114 3SION 3 N 3004 E3MOd IN391T131NI A082 Wel 354 EEE FEE 1100 01044105 3 vA 9 57 Avi pox HOISIH3Hl dW3L 398VHOSIO 2918 HOISIHVA VIN 8l HOLSIWUSHL 1508330 T91H _ BOLIOWN IVT L 3504 W3WHo3sNvul WOISIMHSHL dWiL 3419 SVO 8 91 HOSSIEWOJ __ MW AOS TST EL 3504 AV134 1100 0103105 19855 018163 ____ 7154 _ NOISNVdX3 4441 Hu3WHOJSNVUL IN38309 HOLSIWHSHL Um eer 1 INJHMDO 1V3H HOOOLNO _____80151538 a8 vvod Holvadd 1 HOLlOVdvo ONIHLOOWS 10290002 2019 jeuru18 0 MO 8Q S OQUAG GUPITA P 8TJ 103 K UO S10 2npuo3 180002 asf Z BUT21A18S 104 WEIBEIP 1432818 JUN J00pUI ay 01 18431 BUIJIA 21232918 OPIS JOOpU 34 1nOqV T SUN LIN AWN ST WN Momus 2914 5914 8914 1914 n 281 9 n os 1 S6LNO 199N3 26LNO T6LNO 9NI193NN02
104. pe welded part Suction pipe Photo 4 welded part 1 Compressor nuts Screws of the electrical parts 2 Removing the fan motor Photo 6 1 Remove the top panel the service panel and the cabinet Screws of the outdoor fan mol r Photo 1 2 Disconnect the connectors CN931 and CN932 on the outdoor electronic control P C board 3 Remove the propeller 4 Remove the fan motor Propeller Propeller nut Separator OPERATING PROCEDURE PHOTOS 3 Removing the 4 way valve 1 Remove the top panel Photo 1 2 Remove the service panel the cabinet and the back panel Photo 1 2 3 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG 4 Remove the electrical parts Photo 4 5 Detach the welded parts of 4 way valve and pipe 4 Removing the expansion valve 1 Remove the top panel Photo 1 2 Remove the service panel the cabinet and the back panel Photo 1 2 3 Gas recovery is not required if the unit is pumped down Remove the cabinet for removing LEV E Photo 1 2 5 Remove the electrical parts for removing LEV E Photo 4 5 Remove the LEV coils Detach the welded parts of expansion valves and pipes 8 4 5 6 gt 5 Photo Y zi eal 4 way valve Photo 8 LEV coils 5 Removing the reactor 1 Remove the top panel Photo 1 2 R
105. peration press emergency run ON OFF button or any button on remote controller iedeen sas ee sels de ne ee ee Lene Outdoor low pressure Outdoor unit current A 110 0 0 65 70 75 80 85 90 95 100 105 110 115 65 70 75 80 85 90 95 100 105 110 115 Ambient temperature F Ambient temperature 2 HEAT operation Data is based on the condition of outdoor humidity 75 Set air flow to High speed lnverter output frequency is 45 Hz Z 177 2271 Z uu TE 2 0 15 20 25 30 35 40 45 50 55 60 65 70 75 F Ambient temperature F Outdoor unit current A 49 5 12 class unit in single operation OUTDOOR UNIT MXZ 3A30NA 2 1 MXZ 4A36NA 1 COOL operation Data is based on the condition of indoor humidity 50 Air flow speed High How to work fixed frequency operation gt lnverter output frequency 33 Hz 1 Set emergency switch to COOL or HEAT The switch is locat i ed on indoor unit 2 emergency run ON OFF button 3 Compressor starts running at 33 Hz COOL or 45 Hz HEAT 4 Indoor fan runs at High speed and continues for 30 minutes 5 cancel this operation press emergency run ON OFF button or any button on remote controller Outdoor low pressure 110 65 70 75 80 85 90 95 100 105 110 115 F 0
106. r RT61 Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 Gas pipe temperature thermistor RT6A C MXZ 2A20NA MXZ 3A30NA Measure the resistance with a tester Refer to 11 7 Test point diagram and voltage 1 Outdoor electronic control P C board the chart of thermistor Discharge temperature thermistor RT62 Fin temperature thermistor RT64 Measure the resistance with a tester Before measurement hold the thermistor with your hands to warm it up Refer to 11 7 Test point diagram and voltage 1 Outdoor electronic control P C board the chart of thermistor Compressor U WHT BLK Measure the resistance between terminals using a tester Winding temperature 14 F 104 F Normal Each phase MXZ 3A30NA MXZ 2A20NA MXZ 2A20N A 1 2 MXZ 3A30NA 1 MXZ 4A36NA 0 39 0 0 49 Q 0 86 Q 1 06 Q 1 20 1 490 Outdoor fan motor Measure the resistance between lead wires using a tester Part temperature 14 F 104 F Normal Each phase 13 4 Q 16 4 Measure the resistance using a tester Part temperature 14 F 104 F Normal 1 2 1 56 Linear expansion valve WHT 6 YLW BRN BLU High pressure switch HPS MXZ 3A30NA MXZ 3A30NA MXZ 4A36NA E Measure the resistance using a
107. r flow speed High How to work fixed frequency operation lnverter output frequency 33 Hz 1 Set emergency switch to COOL or HEAT The switch is locat on indoor unit 2 Press emergency run ON OFF button 3 Compressor starts running at 33 Hz COOL or 45 Hz HEAT 4 Indoor fan runs at High speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button or any button on remote controller Outdoor low pressure Outdoor unit current A 130 1 0 65 70 75 80 85 90 95 100105 110 115 65 70 75 80 85 90 95 100 105 110 115 Ambient temperature F Ambient temperature 2 HEAT operation is based on the condition of outdoor humidity 75 Set air flow to High speed lnverter output frequency is 45 Hz Outdoor unit current A 5 20 25 30 35 40 45 50 55 60 65 70 75 F Ambient temperature F 53 9 ACTUATOR CONTROL MXZ 2A20NA MXZ 2A20NA 1 MXZ 2A20NA 2 MXZ 3A30NA MXZ 3A30NA 11 MXZ 4A36NA Relation between main sensor and actuator Actuator Outdoor fan motor Sensor Purpose Compressor LEV Discharge temperature thermistor Protection Indoor coil thermistor Defrosting Protection O Defrost thermistor Defrosting Gas pipe temperature thermistor MXZ 2A20NA MXZ 3A30NA Control Fin temperature thermistor Protection Ambient temperature ther
108. rated voltage in No the power supply Yes Turn ON the power supply LED indication for communication status Communication status is indicated Y by the LED Is there rated voltage between No outdoor terminal block S1 and 52 Unit status Blinking normal communication Lighting abnormal communication or Yes not connecied Press EMERGENCY OPERATION switch once Pattern 1 and 2 is repeatedly displayed alternately Each pattern is displayed for 1 i 15 56conds Does the left lamp of OPERATION NOTE Lighting in the table below does not INDICATOR lamp light up indicate abnormal communication 1 Confirmation of the power to the indoor unit No MXZ 2A20NA Y Yes Is there any mis wiring MXZ 2A20NA 7 No poor contact or wire MXZ 2A20NA gt i Is serial signal error indicated 6 minutes later disconnection of the i indoor outdoor MXZ 3A30NA Yes connecting wire Outdoor electronic control P C board i Parts side 1 No LED3 LED2 LED1 Uv CM i A 1 A 1 Blinkin 9 Turn OFF the power supply Check once more if the indoor outdoor x B connecting wire is not mis wiring Lighting unit B Short circuit outdoor terminal block S2 and 1 Mis wiring may damage indoor electronic control 518108 53 P C board during the opera
109. re than 20 minutes Refer to 11 6 Check of LEV Check refrigerant circuit and refrigerant amount Cooling high pressure 5 times Lighting protection When the outdoor heat exchanger temperature exceeds 136 4 F during operation This symptom does not mean any abnormality of the product but check the following points Check if indoor filters are clogged Check if refrigerant is short Check if indoor outdoor unit air circulation is short cycled Outdoor unit operates normally Lighting Inverter check mode When the unit is operated with emergency operation switch Lighting Lighting Normal NOTE 1 The location of LED is illustrated at the right figur 2 LED is lighted during normal operation e Refer to 11 7 1 The flashing frequency shows the number of times the LED blinks after every 2 5 second OFF Example When the flashing frequency is 2 0 5 second ON 2 5 second OFF 60 p 0 5 second ON Outdoor electronic control P C board Parts side MXZ 2A20NA MXZ 2A20NA 1 MXZ 2A20NA 2 MXZ 3A30NA LED2LED1 Lighting gt e In MXZ 3A30NA 1 MXZ 4A36NA LED1LED2 Lighting gt 11 5 Trouble criterion of main parts MXZ 2A20NA MXZ 2A20NA 1 MXZ 2A20NA 2 MXZ 3A30NA MXZ 3A30NA 1 MXZ 4A36NA Part name Check method and criterion Defrost thermisto
110. rent diameter pipe For further information on Different diameter pipe see 15 1 33 Unit inch Outdoor unit union diameter Indoor unit class Extension pipe diameter For Liquid 1 4 ew 03 Gas 3 8 Indoor unit A Liquid 1 4 Gas 3 8 12 Liquid 1 4 Gas 3 8 Indoor unit B q Dn Gas 3 8 15 Liquid 1 4 Gas 1 2 MXZ 3A30NA Kk Unit mm Service Compressor R V coil Discharge lt OFF gt Refrigerant flow in cooling Age d gt Refrigerant flow in heating thermistor RT62 Oil separator J Capillary tube Unit C gas pipe O D 0 10 x I D 0 02 x 39 37 temperature thermistor Ball valve Indoor unit ck service AN 4 way valve C Unit B gas pipe Indoor unit lt perature thermistor amp O B Muffler Unit A gas pipe gt temperature thermistor lt Indoor unit ck A Outdoor Ambient heat temperature exchanger thermistor y Outdoor heat RT65 4 exchanger temperature thermistor Capillary tube RI68 O D 0 16 x I D 0 11 x 3 54 Defrost thermistor RT61 Capillary tube Strainer O D 0 16 x I D 0 09 x 15 75 Indoor unit SQ A lt gt Strainer p I Ball valve strainer 100 Indoor unit 7 099 0 100 Distributor B lt gt Strainer LEV B A EE gt HOO WV Jvc gt In
111. rigerant into the atmosphere Take care not to discharge refrigerant into the atmosphere during installation reinstallation or repairs to the refrigerant circuit Use the vacuum pump for air purging for the purpose of environmental protection 5 Additional charge For additional charging charge the refrigerant from liquid phase of the gas cylinder If the refrigerant is charged from the gas phase composition change may occur in the refrigerant inside the cylinder and the outdoor unit In this case ability of the refrigeration cycle decreases or normal operation can be impossible However charging the liquid refrigerant all at once may cause the compressor to be locked Thus charge the refrigerant slowly Indoor unit Refrigerant gas cylinder operating valve Union Stop valve Outdoor unit Service port Gauge manifold valve for R410A Refrigerant gas cylinder for R410A with siphon Refrigerant liquid gt Electronic scale for refrigerant charging PART NAMES AND FUNCTIONS 2 MXZ 2A20NA 2 MXZ 2A20NA 2 2 20 i Back and side Back and side Air outlet Drain outlet 5 S x 4A36NA MXZ MXZ 3A30NA 1 MXZ 3A30NA Back and side Drain outlet Air outlet
112. rs to the indoor air outlet The thermometers must be attached to the position where air speed is high 2 Attach at least 2 sets of wet and dry bulb thermometers to the outdoor air intake Cover the thermometers to prevent direct rays of the sun 3 Check that the air filter is cleaned 4 Open windows and doors of room 5 Press the EMERGENCY OPERATION switch once twice to start the EMERGENCY COOL HEAT MODE 6 Compressor starts running at 33 Hz COOL or 45 Hz HEAT The frequency at each operation mode is fixed 7 When system stabilizes after more than 15 minutes measure temperature and take an average temperature 8 10 minutes later measure temperature again and check that the temperature does not change INDOOR UNIT OUTDOOR UNIT Wet and dry bulb Wet and dry bulb thermometers thermometers FRONT VIEW BACK VIEW 42 8 2 CAPACITY AND THE INPUT CURVES
113. s until the pressure gauge shows 0 PSIG 4 Remove the electrical parts Photo 2 5 Detach the welded parts of 4 way valve and pipe Photo 5 4 way valve R V coil 4 Removing the expansion valve 1 Remove the top panel Photo 1 2 Remove the service panel Photo 1 Gas recovery is not required if the unit is pumped down 3 Remove the front panel for removing LEV E Photo 1 3 4 Remove the electrical parts for removing LEV E Photo 2 3 5 Remove the LEV coils 6 Detach the welded parts of expansion valves and pipes LEV coils 81 OPERATING PROCEDURE PHOTOS 5 Removing the reactor 1 Remove the top panel Photo 1 Photo 7 2 Disconnect the reactor lead wire 3 Remove the screws of the reactor and remove the reactor Screws of the reactor 82 12 4 MXZ 3A30NA 1 OUTDOOR UNIT MXZ 4A36NA OPERATING PROCEDURE Photo MXZ 3A30NA PHOTOS 1 Removing the compressor 1 Remove the screws of the top panel and remove the top panel 2 Remove the screws of the service panel and remove the service panel 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG 4 Remove the screws of the front panel and remove the front panel 5 Remove the screws of the rear panel and remove the rear panel 6 Disconnect the compressor lead wire
114. the stop valve later is Lock protection start up Check the power module PAM module repeated Discharge temperature When discharge temperature exceeds 240 8 F during operation Compressor Check the amount of gas and refrigerant circuit protection can restart if discharge temperature thermistor reads 212 F or less 3 Refer to 11 6 Check of LEV inutes later Fin temperature fi W protection P C board temperature protection High pressure When high pressure is detected with the high pressure switch HPS Check around of gas and the refrigerant circuit protection during operation MXZ 3A30NA MXZ 3A30NA 1 MXZ 4A36NA Check of stop valve When the outdoor heat exchanger temperature exceeds 158 F during cooling or when indoor gas pipe temperature exceeds 158 F during heating hen the fin temperature exceeds 188 6 F during operation Check refrigerant circuit and refrigerant amount Refer to 11 6 Check of outdoor fan motor When the P C board temperature exceeds 158 F during operation Converter protection When a failure is detected in the operation of the converter during operation Bus bar voltage When the bus bar voltage exceeds 400V or falls to 200V or below protection 1 during compressor operating Bus bar voltage When the bus bar voltage exceeds 400V or falls to 50V or below protection 2 during compressor operating 13 G Outdoor f When fa
115. this page Operation start Check the outdoor unit LED indicator fd are OFF Refer to 11 6 Check of power supply Both LED 1 and Both LED1 and LED 2 are lighting LED 1 or LED 2 has blinked Refer to 11 4 Troubleshooting check table Y Indoor unit COOL or serial signal HEAT error operation only Refer to 11 6 Refer to 11 6 G How to Check of check R V coil mis wiring and serial signal error When cooling heat exchanger of non operating indoor unit frosts When heating non operating indoor unit gets warm Refer to 11 6 Check of LEV When cooling dew drops in the non operating indoor unit Check of miss piping When heating room does not get When cooling room is not warm Refer to 11 6 How to check inverter compressor Check mis piping shortage of capacity cool Refer to 11 6 6 How to check inverter compressor 58 11 4 Troubleshooting check table Symptom LEDT ENT Abnormal point Condition Condition Correspondence Outdoor unit n a3 Refer to 11 6 0 Check of LEV does not Lighting Once LEV for drain When the indoor unit detects any abnormality in the LEV for drain Check the drain pump of the indoor unit operate When over current protection stop is continuously performed three times
116. tion Goes out Lighting x1 Be sure to confirm the wiring is correct before the operation starts 2 1 Turn ON the EE supply MXZ 4A36NA Outdoor electronic control P C board Parts side mh EUG Ri Does the LED on the outdoor electronic No Replace the outdoor electronic control control P C board repeat 3 6 second OFF gt P C board MAA and 0 8 second ON quick blinking 2 Lighted x2 Blinking or je not lighted 2 Be careful to the residual voltage of smoothing capacitor Unit A Unit B er C Turn OFF the power supply sas status status Remove the short circuit between Is there any error of the Status Lighting Goes out OO terminal block S2 and S3 indoor outdoor connecting wire Replace the power supply i indoor outdoor Is there amplitude of 10 to 20 V DC Such the damage of the wire 1000701 between outdoor terminal block 52 No intermediate connection poor connecting wire 53 lt Confirmation of serial contact to the terminal block Turn OFF inverter controlled lighting signal equipment No Turn OFF the power supply and then Yes turn ON again Press EMERGENCY OPERATION x Is there any error of the switch Is there rated voltage between indoor outdoor connecting wire Replace the Reinstall indoor terminal block 51 and S2 2 such as the dama
117. tional Different diameter pipe For further information on Different diameter pipe see 15 1 Unit inch Wd UE qr ene damele Outdoor unit union diameter Liquid 1 4 1 4 Gas 3 8 Indoor unit A 3 Liquid 1 4 aes HE Liquid 1 4 Gas 3 8 Indoor unit B Liquid 1 4 mes a8 Liquid 1 4 Gas 1 2 Indoor unit C i Liquid 1 4 CEE ae Liquid 1 4 Gas 1 2 Indoor unit D 1 Liquid 1 4 Gee ue 24 Gas 5 8 37 8 DATA Model MXZ 2A20NA MXZ 2A20NA MXZ 2A20NA Item Cooling Heating Capacity 20 000 22 000 SHF Input 2 15 1 78 Outdoor unit MXZ 2A20NA MXZ 2A20NA 1 MXZ 2A20NA Electrical Power supply V phase Hz 208 230 1 60 circuit Input 2 113 1 743 Comp current 208 230V 10 08 9 11 8 24 7 45 Fan motor current 208 230V 0 43 0 39 0 43 0 39 Condensing pressure 435 363 Suction pressure 128 101 Discharge temperature 190 169 Refrigerant Condensing temperature 122 106 circuit Suction temperature 65 40 Comp shell bottom temp Ref pipe length Total pipe length for multi system Refrigerant charge R410A DB Intake air temperature Outdoor WB unit Fan speed Airflow 38
118. utput frequency NOTE The above broken lines are for the heating 43 0 Outdoor intake air Wet bulb temperature F Outdoor intake air Wet bulb temperature F operation without any frost and defrost operation 8 3 Capacity and input correction by means of inverter output frequency OUTDOOR UNIT MXZ 2A20NA MXZ 2A20NA 1 1 09 class unit in single operation MXZ 2A20NA 2 lt COOL gt Capacity COOL Total input lt HEAT gt Capacity lt HEAT gt Total input 2 0 2 0 2 0 2 0 1 5 1 5 1 5 1 5 1 0 1 0 1 0 1 0 0 5 0 5 0 5 0 5 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz 0 50 100 Hz Frequency Frequency Frequency Frequency 2 12 class unit in single operation lt COOL gt Capacity lt COOL gt Total input lt HEA

SERVICE MANUAL - Mitsubishi Electric Cooling & Heating

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SERVICE MANUAL - Mitsubishi Electric Cooling &amp; Heating

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SERVICE MANUAL - Mitsubishi Electric Cooling & Heating