Home

MUY MUZ-GE Service Manual

1. Bus bar voltage Smoothing Smoothing Smoothing R V coil ack side of uni DB61 capacitor capacitor capacitor T3 15AL250V 260 325 VDC C63 C62 C61 2 208 230 lt Fuse F801 hes 208 230 VAC MUZ T3 15AL250V lt Heater con E o D Be rye o 28 op nector ON es a sie O0 gER CNT722 b 30 NO o ER d ete 9 Ue 2 2 2 oy B MUZ GE 2 eje yp j E M AED B o 0 Fuse F901 V ue sS T3 15AL250V Be Ul E he Seti BR iD D H ero o o T5 s omn d 5 2 EE E Es MW os qo 1 Pr drive x ss zz E compressor ae D Ei m P oe 208 230 LDU E 29 40 e H mess FIRS AG VAC d 5 oo LDV m zi 22 73 HPR 7 ER De wd B EBW 82 074295 SE
2. MUZ GE09NA MUZ GE12NA MUZ GE15NA MUZ GEO9NA2 MUZ GE12NA2 MUZ GE15NA2 MUZ GEO9NAH MUZ GE12NAH MUZ GE15NAH MUZ GEO9NAH2 MUZ GE12NAH2 MUZ GE15NAH2 MUY GEO9NA MUY GE12NA MUY GE15NA MUY GEO9NA2 MUY GE12NA2 MUY GE15NA2 Bus bar voltage Smoothing Smoothing Smoothing Heater connector Back side of unit DB61 capacitor capacitor capacitor CN722 260 325 VDC C63 C62 C61 MUZ GE NAH NAH2 5 208 230 e Fuse F801 Fuse F701 T3 15AL250V T3 15AL250V R V coil or E s J z ano CN721 RON arseen 208 230 PRAN 2 542 Z lt 2 E oo VAC obs leeds b 18 Fuse 901 129 Solute mi i PRY 2 5 hi oWo Signal of T3 15AL250V peu dg Ee 2 outdoor Sha 1 Hi or Ed fan motor Output to ioo Y Gie CN931 drive D LEG Qr qu ae et 2c compressor CN 8 Boe A 208 230 LDU one 9 3 TS o To VAC LDV I LS ii gt p
3. WD op aK za BK BLK 2 10 H BLK hj 1 1 1 1 gp 37 580 eds ra pr TIN 74 b Y LDV CIRCUIT MC u PA j DU P 1 5 y LEER supply CN61 IPM LED ail 5 1 phase 60Hz l 3 1 CN642 CN644 CNG43 CN64L CN724 CN932 9 9 9 10121 TAL Ab RUD NOTES 05 rU qud sas 1 About the indoor side electric 3 R168 RTGS RT6L RTB2 el wiring refer to the indoor 20 230V unit electric wiring diagram LEV for servicing 2 Use copper conductors only For field wiring 3 Symbols indicate TTT Terminal block SYMBOL NAME SYMBOL NAME SYMBOL NAME C61 C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL RT68 OUTDOOR HEAT EXCHANGER DB61 DB65 DIODE MODULE MC COMPRESSOR TEMP THERMISTOR F701 F801 F301 FUSE T3 15AL250V MF FAN MOTOR TBI TB2 TERMINAL BLOCK H DEFROST HEATER PTC64 PTC65 CIRCUIT PROTECTION TR821 SWITCHING POWER TRANSISTOR 1 802 DEVICE RT61 DEFROST THERMISTOR 1801 TRANSFORMER IPM 1932 POWER MODULE RT62 DISCHARGE TEMP THERMISTOR X63 X64 X6
4. z an a 26H 1 RED BLK BK ey vaer T i 2 Zio DE 2 2 xem 0865 aD 221 1 PARTS WHT EE act gt m L p leue eo m P Lo TRES coven spo ai m ned p i INVERTER P C BOARD i cusa MEOS DOE 999 19 912 90913 99 12 99 9 9I o o o o 9 of S 8 2 6 DRM Og 1 About the indoor side electric d 4 4 m From INDOOR UNIT wiring refer to the indoor O Pz t di d d 53 COMEC TING MIRES unit electric wiring diagram T68 RT65 T6 0012 01 jer MF 51 yu INDOOR UNIT Use copper conductors only For field wiring LEV M alae SYMBOL NAME SYMBOL NAME SYMBOL NAME T m CT CURRENT TRANSFORMER L62 CMC COIL mre OUTDOOR HEAT EXCHANGER C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL TEMP THERMISTOR 0861 0865 DIODE MODULE MC COMPRESSOR TB1 TB2 ERMINAL BLOCK DSA SURGE ABSORBER FAN MOTOR TRB21 SWITCHING POWER TRANSISTOR F701 F801 F901 FUSE T3 15AL250V PTC64 PTC65 CIRCUIT PROTECTION T801 TRANSFORMER H_ DEFROST HEATERIOPTION PARTS RT61 DEFROST THERMISTOR X63 X64 X66 RELAY 16802 INTELLIGENT POWER DEVICE RT62 DISCHARGE TEMP THERMISTOR 2154 REVERSING VALVE CDIL IPM IC932 INTELLIGENT POWER MODULE RT64 FIN TEMP THERMISTOR 26H HEATER PROTECTOR
5. LED CN642 CNG44 CN643 CN641 CN724 9 9 00013 10 9i 009 11990909090 Al d T64 RT6B RT65 RI61 RTG NOTES 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for Servicing 2 Use copper conductors only For field wiring SYMBOL NAME SYMBOL NAME SYMBOL NAME C61 C62 63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL RT68 OUTDOOR HEAT EXCHANGER DB61 DB65 DIODE MODULE MC COMPRESSOR TEMP THERMISTOR F701 F801 F901 FUSE T3 15AL250V MF FAN MOTOR 1 2 TERMINAL BLOCK DEFROST HEATER OPTION PARTS 64 PTC65 CIRCUIT PROTECTION TR821 SWITCHING POWER TRANSISTOR HC930 IPM POWER MODULE RT61 DEFROST THERMISTOR 1801 TRANSFORMER IC802 POWER DEVICE RT62 DISCHARGE TEMP THERMISTOR X63 X64 X66 RELAY L61 REACTOR RT64 FIN TEMP THERMISTOR 2154 REVERSING VALVE OIL LED LED RT65 AMBIENT TEMP IHERMISTOR 26H HEATER PROTECTOR OPTION PARTS 20 OBH549G 2 2 2 1 2 H DET a 11 1 OPTION PARTS POWER SUPPI 208 230 1 phase GOH JH 1 CIRCUIT BREAKER Om m mms RED 53 BLU BRN 52 TO INDOOR UNIT s1L J CONNECTING WIRES 1 phase 60llz Oo INDOOR UNIT
6. 5 15 25 45 5 5 65 75 F Outdoor ambient tempera 35 ure MUZ GE18NA MUZ GE18NAH PSIG PSIG 500 210 Us 75 65 475 70 65 450 lt N 160 2 425 e 9 o e 3 2 a 3 e e 400 e S amp 135 4 5 5 d S 375 lt 9 110 390 58H 2 58Hz 85 325 3995 15 25 35 45 55 65 75 F 695 15 25 35 45 55 65 75 F Outdoor ambient temperature Outdoor ambient temperature MUZ GE24NA PSIG PSIG 450 210 75 70 65 425 190 400 170 2 375 8 150 2 SU a lt lt 2 350 130 NS 5 325 9 110 o 300 90 58Hz 275 70 250 50 5 15 25 35 45 55 65 75 F 5 15 25 35 45 55 65 75 F Outdoor ambient temperature Outdoor ambient temperature OBH549G 7 4 STANDARD OPERATION DATA MSZ GE09NA MSY GE09NA MSZ GE09NA MSZ GE12NA MSY GE12NA MSZ GE12NA Cooling Heating Cooling Heating Capacity 9 000 10 900 12 000 14 400 SHF 0 82 0 74 Input 0 660 0 760 0 960 1 170 Rated frequency 59 5 77 5 69 0 77 0 Electrical circuit Indoor unit MSZ GE09NA MSY GE09NA MSZ GE12NA MSY GE12NA Power s
7. OBH549G Se 6 REFRIGERANT SYSTEM DIAGRAM MUZ GEO9NA MUZ GEO9NA2 MUZ GEO9NAH MUZ GEO9NAH2 MUY GEO9NA MUY GEO9NA2 Refrigerant pipe 03 8 with heat insulator 4 way valve Unit inch Outdoor heat exchanger 59 EN temperature Muffler Outdoor ermistor Flared connection heat RT68 temperature exchanger lI thermistor RT62 i Service port Ambient emperature Service port thermistor V RT65 Defrost thermistor RT61 MUZ I Capillary tube 100 Flared connection O D 0 118 x I D 0 079 x 9 7 16 LEV 3 0 x 2 0 x 240 gt lt R V coil MUZ heating ON gt lt JUL gt lt cooling OFF Stop valve 1 with strainar Refrigerant pipe 21 4 with heat insulator MUZ GE12NA MUZ GE12NA2 Refrigerant flow in cooling Refrigerant flow in heating MUZ MUZ GE15NA MUZ GE15NA2 MUZ GE12NAH MUZ GE12NAH2 MUZ GE15NAH MUZ GE15NAH2 MUY GE12NA MUY GE12NA2 Refrigerant pipe 03 8 GE12NA Refrigerant pipe 01 2 GE15NA with heat insulator E 4 way valve pb Oe c MUY GE15NA MUY GE15NA2 i Outdoor heat a exchanger C port temperature i Discharge Muffler Outdoor thermistor Flared connection heat Apare b exchanger lI ermistor RT62 I Service port O Service port V Defrost thermistor thermis
8. Releasing the failure mode recall function Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Release the failure mode recall function accord Press RESET button of the remote controller ing to the left mentioned procedure Y Repair the failure parts Deleting the memorized abnormal condition After repairing the unit recall the failure mode again according to Setting up the failure mode recall function 10 2 1 Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted Release the failure mode recall function according to Releasing the failure mode recall function men tioned above NOTE 1 Make sure to release the failure mode recall function after it is set up otherwise the unit cannot operate properly 2 If the abnormal condition is not deleted from the memory the last abnormal condition is kept memorized X2 Blinking pattern when outdoor unit is abnormal 2 Blinking at 0 5 Blinking at 0 5 2 5 second OFF 3 second ON second interval 2 5 second OFF 3 second ON second interval 4 gt lt gt lt lt gt lt gt lt Ne I s 5 OFF Min gt gt No beep
9. 3 1 CN642 CN644 CN643 CN641 CNT24 s CN932 ilp oo 19 9 21 41 t It 6 RT64 RT65 RT62 LEV NOTES T 1 About the indoor side electric wiring refer to the indoor unit electric wirino diagram for servicing 2 Use copper conductors only For field wiring SYMBOL NAME SYMBOL NAME SYMBOL NAME CT CURRENT TRANSFORMER L62 CMC COIL Rrgg OUTDOOR HEAT EXCHANGER C61 62 83 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL TEMP THERMISTOR 0861 0865 DIDDE MDDULE COMPRESSOR TERMINAL BLOCK DSA SURGE ABSORBER FAN MOTOR TR821 SWITCHING POWER TRANSISTOR F101 FAOL F901 FUSE T3 15AL250V PTCG4 PTCGS CIRCUIT PROTECTION 801 TRANSFORMER H DEFROST HEATER OPTION PARTS RT61 DEFROST THERMISTOR X63 X64 X66 RELAY 930 IPM INTELLIGENT POWER MODULE RT62 DISCHARGE TEMP THERMISTOR 2154 REVERSING VALVE COIL 1C802 INTELLIGENT POWER DEVICE RT64 FIN TEMP THERMISTOR 26H HEATER PROTECTOR OPTION PARTS 161 REACTOR RT65 AMBIENT THERMISTOR MUZ GE18NA 4 om OPTION PARTS POWER SUPPLY 208 230V 1 phase 60Hz 1 CIRCUIT BREAKER UNIT NNECTING WIRES 12 24 INDOOR UNIT 53H gt X 1 NNECTING WIRES 208 230V 1 phase 60Hz FROM INDOOR UNIT NNECTING WIRE
10. do Jm W N RES lac LDV MC U LDU U P P IPM Ba INVERTER P C BOARD iP ae 208 230 phase 60Hz a SUPPLY CN641 ron INDOOR UNIT CNG 2 5 C N932 o 9 9 1 o o 1 o o o 3 10 oo Om OMU NOTES mer ie EE 1 About the indoor side electric 4 ron INDOOR UNIT wiring refer to the indoor es Jn d di di SST s UMEN VES unit electric wiring diagram T64 RT68B RT65 T62 yn 10 0 for servicing MF J UNIT 2 Use copper conductors only SL pmm CONNECTING WIRES For field wiring 208 230V phase GOHZ SYMBOL NAME SYMBOL NAME SYMBOL NAME C61 C62 C63 SMOOTHING CAPACITOR M COMPRESSOR TB2 TERMINAL BLOCK DB61 DB65 DIODE MODULE MF FAN MOTOR TR821 SWITCHING POWER TRANSISTOR F801 F901 FUSE T3 15AL250V PTC64 PTC65 CIRCUIT PROTECTION T801 TRANSFORMER 1 802 POWER DEVICE RT62 _ DISCHARGE TEMP THERMISTOR X64 RELAY IPM 1 932 POWER MODULE RT64 FIN IHERMISTOR LED LED RT65 AMBIENT TEMP THERMISTOR LEV EXPANSION VALVE COIL RT68 OUTDOOR
11. Drain 3 holes 5 1 e Drain hole m 21 5 16 GE18NAH Air ut 4 3 8 x 13 16 slot 19 11 16 2 When 2 sides of left right 3 3 16 of the unit clear 33 1 16 4 25 32 7 7 SS Y SS 33 7 16 E ffi S NS i N SS i Liquid 1 4 flared Gas 1 2 flared 8 11 32 OBH549G MUZ GE24NA MUY GE24NA 16 7 16 Air in Unit inch REQUIRED SPACE 1 20 in or more when front and sides of the unit are clear Drain hole 1 5 8 1 9 16 13 14 3 16 6 7 8 Air out 19 11 16 gt lt 33 1 16 2 holes 13 32 X13 16 2 When any 2 sides of left right and rear of the unit are clear 3 3 16 Service panel 17 25 32 Liquid refrigerant pipe joint Refrigerant pipe flared e 3 8 OBH549G O o gt Fo N NI a Gas refrigerant pipe joint Refrigerant pipe flared 5 8 7 11 16 5 WIRING DIAGRAM MUZ GEO9NA MUZ GE12NA
12. 70 110 6870 75 80 85 90 95 100 105 F 6870 75 80 85 90 95 100 105 F Outdoor ambient temperature Outdoor ambient temperature Heating MUZ Data is based on the condition of outdoor humidity 75 Air flow should be set to High speed Data is for heating operation without any frost MUZ GEO9NA MUZ GEO9NA2 MUZ GE09NAH MUZ GE09NAH2 PSIG PSIG 370 210 345 185 320 160 295 135 Condensing pressure Suction pressure 270 110 245 85 60 15 25 35 45 55 65 75 F 5 15 25 35 45 55 65 T5 F Outdoor ambient temperature Outdoor ambient temperature 220 5 OBH549G MUZ GE12NA MUZ GE12NA2 MUZ GE12NAH MUZ GE12NAH2 PSIG Condensing pressure 460 420 380 340 300 260 5 15 25 35 Outdoor ambient tempera MUZ GE15NA MUZ GE15NA2 MUZ GE15NAH MUZ GE15NAH2 PSIG Condensing pressure 440 404 368 332 296 260 5 15 45 55 65 75 F 25 35 45 5 5 Outdoor ambient OBH549G ure 65 75 F PSIG Suction pressure 210 185 160 135 110 85 25 35 45 Outdoor ambient temperatu PSIG Suction pressure 210 185 160 135 110 85 60 55 65 75
13. Disconnect the connector between compressor and the intelligent power module IPM power module IPM X1 Y Check the voltage between terminals See 10 5 Check of open phase Y Are the voltages balanced No Replace the inverter P C board Yes Check the compressor freee See 10 5 Check of compressor B Check of open phase e With the connector between the compressor and intelligent power module power module X1 disconnected activate the in verter and check if the inverter is normal by measuring the voltage balance between the terminals Output voltage is 50 130 V The voltage may differ according to the tester lt lt Operation method gt gt Start cooling or heating operation by pressing EMERGENCY OPERATION switch on the indoor unit TEST RUN OPERA TION Refer to 7 6 Measurement point at 3 points BLK U WHT V Measure AC voltage between the lead wires at 3 points BLK U RED W WHT V RED W NOTE 1 Output voltage varies according to power supply voltage 2 Measure the voltage by analog type tester 3 During this check LED of the inverter P C board flashes 9 times Refer to 10 6 1 O Check of compressor winding No Replace the compressor Is the compressor normal Yes to 10 5 0 Check of compressor Refer to 10 5 Check of compressor operation time No Refer to
14. MSZ GE06 09 12 15 18NA MSZ GE24NA MSY GE24NA MITSUBISHI ELECTRIC 3X1 Regardless of normal or abnormal condition a short Does the upper lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0 5 seconds beep is emitted once the signal is received Indoor unit is normal LU Either indoor or ou door unit is abnormal Beep is No But the outdoor unit might be abnormal because there are some abnor emitted at the same timing as the blinking ot the upper OFF malities that cannot be recalled with this way lamp of OPERATION INDICATOR lamp 2 Check if outdoor unit is abnormal according to the detailed outdoor unit Yes failure mode recall function Refer to 10 2 2 Judgment of indoor outdoor abnormality Blinks Before blinking does the upper lamp of OPERATION INDICA TOR lamp stay ON for 3 seconds When it stays ON for 3 seconds without beep Yes The outdoor unit is abnormal The indoor unit is abnormal The outdoor unit is abnormal Check the blinking pattern and identify the abnormal point by referring to indoor unit failure mode table Refer to indoor unit service manual Make sure to check at least two consecutive blinking cycles 2 outdoor unit failure mode table Refer to 10 2 3 Check the blinking pattern and identify the abnormal point by referring to Make sure to check at least two consecutive blinking cycles X3 r Rel
15. operational frequency of compressor MUZ GE15NA MUZ GE15NA2 MUZ GE15NAH MUZ GE15NAH2 MUZ GE15NA MUZ GE15NA2 MUY GE1SNA MUY GE15NA2 MUZ GE15NAH MUZ GE15NAH2 Correction of Cooling capacity Correction of Cooling total input Correction of Heating capacity Correction of Heating total input 2 0 2 0 5 1 5 o 8 p 8 g 191 5 8 15 S 8 5 amp 51 0 S40 9 1 0 10 8 8 E 8 205 8 0 5 85 0 5 5 0 5 8 2 a a c 0 50 100 150 100 150 Hz 0 50 100 150 Hz 50 100 150 Hz Hz The operational frequency of compressor MUZ GE18NA MUZ GE18NAH MUY GE18NA Correction of Cooling capacity 1 5 0 5 Capacity correction factors EH Input correction factors OBH549G The operational frequency of compressor The operational frequency of compressor 0 5 Correction of Cooling total input 0 Hz 150 Hz The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor Capacity correction factors 0 5 The operational frequency of compressor MUZ GE18NA MUZ GE18NAH Correction of Heating capacity Correction of Heating total input 5 1 5 o js 1 0 9 9 9 5 905 6 MILI E 0 50 100 150 Hz 50 100 150 Hz The operational frequency of compressor 40 MUZ GE24NA MUY GE24NA MUZ GE24NA Correction of Cooling capacity PS Correction of Cooling total input iE
16. LDW O maser us i e c 1 5 De Rino od 71107 FIERE on UV C s 89 a JES We TH E gem 83 ORE cete E or QUU AUN qc cV Ur PC s zm ER op E SLE 42 i F 35 egt git tX Her _ o OSA aedium J m Hj 922944 5 LE 3 S Front side of unit Output to drive outdoor LED LEV Jumper wire for Jumper wire fan motor CN932 Fin temperature thermistor RT64 CN642 Outdoor heat exchanger temperature thermistor IRT68 CN644 Defrost thermistor RT61 Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 Resistance kQ 14 OBH549G 32 50 68 Temperature F 86 104 Discharge temperature connector thermistor RT62 CN641 Defrost thermistor RT61 CN641 MUZ Ambient temperature thermistor RT65 CN643 Resistance kQ PY pbs temperature thermistor RT62 32 60 68 86 104 122 140 158 176 194 212 230 248 Temperature F 61 changing defrost for pre heat CN724 setting JS MUZ control setting JK Fin temperature thermistor RT64 200 Resistance kQ 0 32 50 68 86 104122 140 158 176 Temperature F MUZ GE18NA MUZ GE18NAH MUY GE18NA
17. CONNECTING WIRE MUZ GE18NAH INVERTER P C BOARD m 27 2 ak 6 SETET F 1 8k EET 1 POR supry CN331 3 N642 N643 CN64L CN724 9 9 o o ols 4932 9 1 o 9 1 l4 4B du fl al A D T64 165 61 RT62 NOTES 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring SYMBOL NAME SYMBOL NAME SYMBOL NAME 061 C62 53 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL RT68 OUTDOOR HEAT EXCHANGER DB61 0865 DIODE MODULE MC COMPRESSOR TEMP THERMISTOR F701 F801 F901 FUSE T3 15AL250V FAN 181 TB2 TERMINAL BLOCK H DEFROST HEATER PTC64 PTC65 CIRCUIT PROTECTION TR821 SWITCHING POWER TRANSISTOR HC930 IPM POWER MODULE RT61 DEFROST THERMISTOR T801 TRANSFORMER IC802 POWER DEVICE RT62 _ DISCHARGE TEMP THERMISTOR X63 X64 X66 RELAY 161 REACTOR RT64 FIN TEMP THERMISTOR 2154 REVERSING VALVE COIL LED LED RT65 AMBIENT TEMP THERMISTOR 26H HEATER PROTECTOR MUY GE18NA ORN 161 YLW W mp 5 3 gp Cul be BK K MEU OS 00091 1 NOTES 1 Abou wiring diagra
18. Photo 8 Brazed part of the discharge pipe Discharge temperature thermistor 4 of the suction pipe 549 73 MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2009 MITSUBISHI ELECTRIC CORPORATION Distributed in Jan 2015 No OBH 549 REVISED EDITION G Distributed in Dec 2013 No OBH 549 REVISED EDITION F Distributed in Apr 2012 No OBH 549 REVISED EDITION E Distributed in Apr 2011 No OBH 549 REVISED EDITION D Distributed in Apr 2011 No OBH 549 REVISED EDITION C Distributed in Dec 2010 No OBH 549 REVISED EDITION B Distributed in Sep 2010 No OBH 549 REVISED EDITION A 5 Distributed in Jul 2009 No OBH 549 5 New publication effective Jan 2015 Made in Japan Specifications are subject to change without notice
19. Use copper conductors only For field wiring MS f 3 RT64 RT68 RT65 RTG 208 230V Pose phase 6002 O 53 piam 521 TO INDOOR UNIT 1 208 230V 3 Symbals indicate Terminal block SYMBOL NAME SYMBOL NAME SYMBOL NAME 61 C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL RT68 OUTDOOR HEAT EXCHANGER DBE 1 0865 DIODE MODULE MC COMPRESSOR TEMP THERMISTOR FIDL F801 F901 FUSE T3 15AL250V FAN MOTOR TBI TB2 TERMINAL BLOCK H DEFROST HEATERIOPTION PARTS PTC64 PTC65 CIRCUIT PROTECTION TR821 SWITCHING POWER TRANSISTOR 1 802 POWER DEVICE RT61 DEFROST THERMISTOR 1801 TRANSFORMER IPM 1 932 POWER MODULE RT62 _ DISCHARGE TEMP THERMISTOR X63 X64 X66 RELAY L61 REACTOR RT64 FIN TEMP THERMISTOR 2154 REVERSING VALVE COIL LED LED RT65 AMBIENT TEMP THERMISTOR 26H HEATER PROTECTOR OPT ION PARTS MUZ GE15NAH 26 OPTION PARTS H B BK BK BLK BLK YLW Lov LOU U P IPM INVERTER P C BOARD CN331 o o o o 5 1 CN642 CN641 CN724 Cg P ER tee POWER SUPPI e 208 230
20. 1 06 1 03 1 09 70 1 1 04 1 01 1 06 65 1 00 0 98 1 03 75 0 95 1 06 1 12 MUZ GE18NA 70 0 93 1 04 1 09 65 0 90 1 01 1 06 75 1 08 1 06 1 12 MUZ GE18NAH 70 1 06 1 04 1 09 65 1 03 1 01 1 06 75 2 05 2 28 2 40 MUZ GE24NA 70 2 00 2 22 2 34 65 1 93 2 16 2 28 NOTE 1 IDB Intake air dry bulb temperature TC Total Capacity x10 Btu h TPC Total Power Consumption kW 2 Above data is for heating operation without any frost MUZ GEO9NA MUZ GEO9NA2 MUZ GEO9NAH MUZ GE09NAH2 MUZ GE12NA MUZ GE12NA2 MUZ GE12NAH MUZ GE12NAH2 MUZ GE15NA MUZ GE15NA2 MUZ GE15NAH MUZ GE15NAH2 How to operate with fixed operational frequency of the compressor 1 Press the EMERGENCY OPERATION switch on the front of the indoor unit and select either EMERGENCY COOL mode or EMERGENCY HEAT mode before starting to operate the air conditioner The compressor starts with operational frequency The fan speed of the indoor unit is High This operation continues for 30 minutes In order to release this operation press the EMERGENCY OPERATION switch twice or once or press any button on the remote controller N OBH549G zn 7 2 PERFORMANCE CURVE Cooling Cooling capacity at Rated frequency 1 5 N difference
21. F e Capacity correction factors e to Indoor air Wet bulb temperature Indoor intake air WB temperature F 79 75 72 68 64 14 23 32 41 50 59 77 86 95 104 113 Outdoor intake air DB temperature F MUZ GE09NA MUZ GE09NA2 MUZ GEO9NAH MUZ GEO9NAH2 MUY GEO9NA MUY GEO9NA2 SHF at rating condition 0 76 Airflow 307 CFM e 65 75 85 95 105 115 Outdoor intake air DB temperature MUZ GE15NA MUZ GE15NA2 MUZ GE15NAH MUZ GE15NAH2 MUY GE15NA MUY GE15NA2 SHF at rating condition 0 80 2 Airflow 498 65 75 85 95 105 115 Outdoor intake air DB temperature F MUZ GE24NA MUY GE24NA SHF at rating condition 0 75 Airflow 634 CFM 2 1 71 1 9 63 in E17 e jer atu ke we tere or inte ndo Total power consumption kW gt 65 75 85 95 105 115 Outdoor intake air DB temperature F OBH549G MUZ GE12NA MUZ GE12NA2 MUZ GE12NAH MUZ GE12NAH2 MUY GE12NA MUY GE12NA2 SHF at rating condition 0 73 Airflow 350 e 65 75 85 95 105 115 Outdoor intake air DB temperatu
22. 27 600 7 500 36 900 Capacity Rated Maximum Heating 17 2 16 000 24 600 Power consumption Cooling 1 1 800 570 3 580 1 800 570 3 580 Rated Minimum Maximum Heating 47 1 2 340 520 3 650 Power consumption Rated Maximum Heating 17 2 1 770 3 290 EER 1 SEER x3 Cooling 12 5 19 0 HSPF IV 34 Heating 10 0 COP Heating 1 3 46 Power supply V phase Hz 208 230 1 60 Max fuse size time delay A 20 Min circuit ampacity A 17 1 Fan motor 0 93 SNB172FQKMT 12 9 Compressor 16 1 Refrigeration oil Model 0 40 FV50S Refrigerant control Linear expansion valve Cooling 55 Sound level 1 Heating 55 Defrost method Reverse cycle 33 1 16 13 Dimensions D H 34 5 8 Weight 119 External finish Munsell 3Y 7 8 1 1 Remote controller Wireless type Control voltage by built in transformer 12 24 Refrigerant piping Not supplied Refrigerant pipe size Liquid 3 8 0 0315 Min wall thickness Gas 5 8 0 0315 Indoor Flared Connection method I Outdoor Flared Between the indoor amp Height difference 50 outdoor units Piping length 100 Refrigerant charge R410A 4 Ib 3 oz NOTE Test conditions are based on AHRI
23. C or temperature of P C board tem perature thermistor on the inverter P C board exceeds 158 167 F 70 75 C eCheck around outdoor unit Check outdoor unit air passage Refer to 10 5 Check of outdoor fan motor 5 time flash 2 5 seconds OFF High pressure pro tection Temperature of indoor coil thermistor exceeds 158 F 70 C in HEAT mode MUZ only Temperature of outdoor heat exchanger temperature thermistor exceeds 158 F 70 C in COOL mode Check refrigerant circuit and refrigerant amount Check stop valve 8 time flash 2 5 seconds OFF Compressor syn chronous abnormal ity The waveform of compressor current is distorted Reconnect connector of compressor Refer to 10 5 How to check inverter compressor 10 time flash 2 5 seconds OFF Outdoor fan motor Outdoor fan has stopped 3 times in a row within 30 seconds after outdoor fan start up Refer to 10 5 Check of outdoor fan motor Refer to 10 5 Check of inverter board 12 time flash 2 5 seconds OFF Each phase current of compressor Each phase current of compressor cannot be detected normally Refer to 10 5 How to check inverter compressor 13 time flash 2 5 seconds OFF DC voltage DC voltage of inverter cannot be detected normally Refer to 10 5 How to check inverter compressor 1 time flash 2 5 seconds OFF Outdoor unit oper Frequency drop
24. Fin temperature thermistor RT64 CN673 000000 ioe temperature thermistor RT62 0 32 60 68 86 104 122 140 158 176 194 212 230 248 a A elejejo o o o o o o ri LEV connector CN724 JP715 JP30 Temperature F 63 Bus bar voltage 294 370 VDC 5 Fin temperature thermistor RT64 0 32 50 68 86 104122 140 158 176 Temperature F 11 DISASSEMBLY INSTRUCTIONS lt Terminal with locking mechanism Detaching points gt The terminal which has the locking mechanism can be detached as shown below There are two types refer to 1 and 2 of the terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out Check the shape of the terminal before detaching 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Sleeve Slide the sleeve Hold the sleeve and Pull the terminal while pull out the terminal pushing the locking slowly lever Connector
25. REVERSING VALVE SOLENOID COIL OBH549G 5 MUY GE24NA POWER SUPPLY 208 230V 1 phase 60Hz CIRCUIT Sa en BREAKER 15 5 ww Eg TO INDOOR UNIT 5 CONNECTING WIRES TAB6 1 phase 82 51 21310 18 o Megi 4 1 CN671 6 CN672 CN673 1 CN724 6 Dci2 2aV E oo 9999 io ob 69999 SH En am FR gt lt ex lo INDOOR UNIT lt CONNECTING WIRE tT t t mE RT62 RT68 RTGS RTE LEV SYMBOL NAME SYMBOL NAME NOTES L About side Wiring j SMOOTHING CAPACITOR PEC POWER FACTOR CONTROLLER PUR E F62 FUSE T2AL250V PTC64 CIRCUIT PROTECTION 3 Symbols indicate Terminal block F65 F66 FUSE 3AL250V PTC65 CIRCUIT PROTECTION 880 FUSE T3 15AL250V 9762 DISCHARGE TEMP THERMISTOR F901 FUSE T3 15AL250V R164 FIN TEMP THERMISTOR ICO 321 INTELLIGENT POWER MODULE 1765 AMBIENT TEMP THERMISTOR IPM INTELLIGENT POWER MODULE OUTDOOR HEAT EXCHANGER L REACTOR TEMP THERMISTOR LEV EXPANSION VALVE COIL IBA TERMINAL BLOCK C COMPRESSOR T801 TRANSFORMER F FAN MOTOR X64 RELAY
26. TOUR UNIT CONNECTING WIRE mm TBL 1 phase 60Hz CIRCUIT BREAKER Oe a j GROUND Fo UNT Tee CONNECTING WIRES REDS aL yp aser TO INDOOR UNIT SIl p J WIRES SN BN 208 230 phase 60Hz Zo N TOR UNIT CONNECTING WIRE MUY GE18NA W np Ser RED amp ak 1 LDV MC U 1 1 LDU U P CN61 IPM NOTES 1 About the indoor side electric wiring re CN931 3 CNG42 CN644 CN643 CN641 CN724 f 110 9 9 o 5 CN932 0 o O 1 2160913 9912 41 6 E 3 gt 7 E O RT64 RT65 RT62 MF LEV er to the indoor unit electric BLK Bl se POWER SUPPLY 208 230 1 phase 60Hz Lik atn m Wiring diagram for servicing 2 Use copper conductors only For field wiring SYMBOL SYMBOL NAME SYMBOL NAME C61 C62 C63 SMOOTHING CAPACITOR MC COMPRESSOR TB1 TB2 TERMINAL BLOCK DB61 DB65 DIODE MODULE MF FAN MOTOR 821 SWITCHING POWER TRANSISTOR FOOL F901 FUSE T3 15AL250V PTC64 PTC65 CIRCUIT PROTECTION T801 TRANSFORMER HC930 IPM POWER MODULE RT62 DISCHARGE TEMP THERMISTOR X64 RELAY 802 POWER DEVICE RT64 FIN TEMP THERMISTOR LED LED RT65 AMBIENT TEMP THERMISTOR LEV EX
27. 105 F Outdoor ambient temperature MUZ GE15NA2 MUZ GE15NAH2 MUY GE15NA2 400 360 Condensing pressure 320 god 80 6870 MUZ GE18NA MUZ GE18NAH MUY GE18NA PSIG 430 75 80 85 90 95 100 105 F Outdoor ambient temperature 390 350 Condensing pressure 310 270 6870 OBH549G 75 80 85 90 95 100 105 F Outdoor ambient temperature PSIG 190 170 150 Suction pressure 130 110 6870 PSIG 75 80 85 90 95 Outdoor ambient temperature 100 105 F 200 86 180 door DB tempe rature F 80 75 Suction pressure A 140 120 70 6870 75 80 Outdoor ambient temperature 85 9 95 100 105 F PSIG 160 86 145 80 75 70 Suction pressure 115 o voe gef 00 6870 33 75 80 85 90 95 Outdoor ambient temperature 100 105 F MUZ GE24NA MUY GE24NA PSIG PSIG 480 180 86 450 170 420 160 80 390 150 75 360 140 70 Condensing pressure Suction pressure 330 130 Indoor DB temperature F 300 120
28. 2 12 3 11 2 11 4 10 7 9 9 13 2 12 2 11 4 14 7 13 6 12 4 15 9 14 9 13 9 18 2 16 9 15 7 20 1 18 7 17 0 Model TPC 0 64 0 61 0 58 0 94 0 89 0 85 1 05 1 00 0 96 1 60 1 52 1 45 1 76 1 67 1 59 TC 9 7 9 0 8 5 TPC 0 69 0 66 0 63 1 01 0 96 0 92 1 13 1 08 1 03 1 72 1 64 1 57 1 89 1 80 1 72 TC 9 0 8 4 7 7 MUZ GE09NA NA2 MUZ GE09NAH NAH2 MUY GE09NA NA2 MUZ GE12NA NA2 MUZ GE12NAH NAH2 MUY GE12NA NA2 MUZ GE15NA NA2 MUZ GE15NAH NAH2 MUY GE15NA NA2 MUZ GE18NA MUZ GE18NAH MUY GE18NA MUZ GE24NA MUY GE24NA 65 MUZ GE09NA NA2 MUZ GE09NAH NAH2 MUY GE09NA NA2 MUZ GE12NA NA2 MUZ GE12NAH NAH2 MUY GE12NA NA2 MUZ GE15NA NA2 MUZ GE15NAH NAH2 MUY GE15NA NA2 MUZ GE18NA MUZ GE18NAH MUY GE18NA MUZ GE24NA MUY GE24NA 28 OBH549G 3 HEATING CAPACITY MUZ Indoor air Outdoor intake air WB temperature F Model 25 35 43 TPC TC TPC TC TPC 75 7 9 0 67 9 4 0 74 0 78 70 8 2 0 65 9 6 0 72 0 76 65 8 6 0 63 0 70 0 74 75 7 9 0 80 94 0 74 0 78 70 8 2 0 78 9 6 0 72 0 76 65 8 6 0 76 0 70 0 74 75 3 1 02 1 14 1 20 70 1 00 1 11 1 17 65 2 0 97 1 08 1 14 75 1 15 1 14 1 20 70 f 1 13 1 11 1 17 65 1 10 1 08 1 14 75 0 93 1 03 1 09 70 0 91 1 01 1 06 65 0 87 0 98 1 03 75
29. 210 240 3 4 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 FDB 60 FWB Outdoor 17 FDB 15 FWB OBH549G Test condition 3 44 Indoor air condition F Outdoor air condition F Dry bulb Wet bulb Dry bulb Wet bulb Test A 2 Cooling Steady State at rated compressor Speed B 2 Cooling Steady State at rated compressor Speed 80 67 95 75 80 67 82 65 SEER 1 Cooling Steady State Cooling at minimum compressor Speed 80 67 82 65 F 1 Cooling Steady State at minimum compressor Speed E V Cooling Steady State at Intermediate compressor Speed 5 H1 2 Heating Steady State at rated compressor Speed H3 2 Heating at rated compressor Speed 0 1 Heating Steady State at minimum compressor Speed H1 1 Heating Steady State at minimum compressor Speed H2 V Heating at Intermediate compressor Speed 5 80 67 67 53 5 80 67 87 69 70 60 47 43 70 60 17 15 HSPF Heating MUZ 70 60 62 70 60 47 70 60 35 3 5 At Intermediate compressor Speed Cooling rated compressor speed minimum compressor speed 3 minimum compressor speed 3 1 OPERATING RANGE 1 POWER SUPPLY Rated voltage Guaranteed voltage V 208 230 V 208 230 Max 253 Outdoor un
30. 52 2 17 0 78 1 11 0 83 1 18 OBH549G 2 Check method and criterion Figure Outdoor fan motor Measure the resistance between lead wires using a tester Temperature 4 104 F 20 40 C Normal Color of lead wire GE09 12 GE15 GE18 24 RED BLK BLK WHT WHT RED 28 40 11 16 WHT RED BLK W R V coil 21S4 MUZ Measure the resistance using a tester Temperature 14 104 F 10 40 C Normal 0 97 1 38 Expansion valve coil LEV Measure the resistance using a tester Temperature 14 104 F 10 40 C MUZ GE09 12 15 18NA MUZ GE09 12 15NA2 MUZ GE09 12 15 18NAH MUZ GE09 12 15NAH2 MUY GE09 12 15 18NA MUY GE09 12 15NA2 Color of lead wire Normal WHT RED RED ORN YLW BRN BRN BLU 37 54 WHT ORN 3 YLW BRN BLU Measure the resistance using a tester Temperature 14 104 F 10 40 C MUZ GE24NA MUY GE24NA Color of lead wire Normal Q RED ORN RED WHT RED BLU RED YLW 37 54 ORN RED 12V YLW BLU Defrost heater MUZ GE NAH OBH549G Measure the resistance using a tester Temperature 14 104 F 10 40 C Normal Q 349 428 51 10 5 TROUBLESHOOTING FLOW How to check inverterlcompressor
31. Correction of Heating capacity 26 Correction of Heating total input E 1 5 5 5 1 0 2 1 5 1 0 o 1 0 205 8 0 5 2 0 5 50 100 150 Hz 0 50 100 150 Hz 0 50 100 150 Hz 0 50 100 150 Hz The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor 7 6 HOW TO OPERATE FIXED FREQUENCY OPERATION Test run operation 1 Press EMERGENCY OPERATION switch to start COOL or HEAT mode COOL Press once HEAT Press twice 2 Test run operation starts and continues to operate for 30 minutes 3 Compressor operates at rated frequency in COOL mode or 58 Hz in HEAT mode 4 Indoor fan operates at High speed 5 After 30 minutes test run operation finishes and EMERGENCY OPERATION starts operation frequency of compressor var ies To cancel test run operation EMERGENCY OPERATION press EMERGENCY OPERATION switch or any button on remote controller OBH549G 8 ACTUATOR CONTROL MUZ GEO9NA MUZ GEO9NA2 MUZ GEO9NAH MUZ GEO9NAH2 MUY GEO9NA MUY GE12NA MUY GEO9NA2 MUY GE12NA2 8 1 OUTDOOR FAN MOTOR CONTROL The fan motor turns ON OFF interlocking with the compressor ON The fan motor turns ON 5 seconds before the compressor starts up OFF The fan motor turns OFF 15 seconds after the compressor has stopped running 15 seconds MUZ GE12NA MUZ GE12NA2 MUZ GE12NAH MUZ GE12NAH2 MUZ GE15
32. DEFROST HEATERIOPTION PARTS RT61 DEFROST THERMISTOR X63 X64 X66 RELAY 10800 INTELLIGENT POWER DEVICE R162 DISCHARGE TEMP THERMISTOR 2154 REVERSING VALVE COIL IPM 1 932 INTELLIGENT POWER MODULE R764 FIN TEMP THERMISTOR 26H HEATER PROTECTORIOPT ON PARTS 161 REACTOR _RT65 AMBIENT TEMP THERMISTOR MUZ GE15NA 1 D 22 gk 269 u E zi 2 Ra i 5 BK i 17 71 OPTION PARTS Om Tat CIRCUIT 1 GROUND T POWER SUPPLY 12 Life phase Gone From INDOOR UNIT OM CONNECTING WIRE m From INDOOR UNIT 53 CONNECTING WIRES SUN 52 TO INDOOR UNIT CONNECTING WIRES 1 phase GHz BLK LDV 1 LDU u NOTES EEN IPM INVERTER P C BOARD CN643 CN641 CN724 LED 1937 9 9 3 10 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 4d i e t t T64 RT68 RT65 RT61 RT62 SYMBOL NAME SYMBOL NAME SYMBOL NAME C61 C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL RT68 OUTDOOR HEAT EXCHA
33. GE15NA MSZ GE18NA MSY GE18NA MSZ GE18NA Cooling Heating Cooling Heating Capacity 14 000 18 000 17 200 21 600 SHF 0 80 0 71 Input 1 080 1 600 1 640 1 900 Rated frequency 55 5 74 0 83 0 84 0 Electrical circuit Indoor unit MSZ GE15NA MSY GE15NA MSZ GE18NA MSY GE18NA Power supply V Phase Hz 208 230 1 60 Input 0 045 0 031 0 043 0 037 Fan motor current 0 50 0 45 0 35 0 32 0 43 0 39 0 40 0 36 Outdoor unit MUZ GE15NA MUZ GE15NA2 MUZ GE15NAH MUZ GE15NAH2 MUY GE15NA MUY GE15NA2 MUZ GE15NA MUZ GE15NA2 MUZ GE15NAH MUZ GE15NAH2 MUZ GE18NA MUZ GE18NAH MUY GE18NA MUZ GE18NA MUZ GE18NAH Power supply V phase Hz 208 230 1 60 Input 1 035 1 569 1 595 1 860 Comp current 4 86 4 40 7 38 6 67 6 97 6 29 8 36 7 55 Fan motor current 0 33 0 30 0 34 0 31 0 80 0 72 0 64 0 59 Refrigerant circuit Condensing pressure 400 431 376 458 Suction pressure 139 99 117 102 Discharge temperature 164 179 177 184 Condensing temperature 117 122 112 127 Suction temperature 57 31 59 33 Comp shell bottom temp 148 165 164 170 Ref pipe length Refrigerant
34. MUZ GE12NAH NAH2 10 44 MUZ GE15NA 2 MUZ GE15NAH NAH2 11 DISASSEMBLY INSTRUCTIONS 64 MUY GEO9NA NA2 MUY GE12NA NA2 PARTS CATALOG OBB549 MUY GE15NA 2 Ss Mir SLIM RoHS compliant products have lt G gt mark on the spec name plate e Use the specified refrigerant only Never use any refrigerant other than that specified Doing so may cause a burst an explosion or fire when the unit is being used serviced or disposed of Correct refrigerant is specified in the manuals and on the spec labels provided with our products We will not be held responsible for mechanical failure system malfunction unit breakdown or accidents caused by failure to follow the instructions Revision A MUZ GE24NA and MUY GE24NA have been added Revision B Descriptions regarding the outdoor fan motor has been corrected Revision C e MUZ GE15NA 1 MUZ GE18NA cu MUY GE15NA 1 and MUY GE18NA have been added Revision D Specification has been corrected Capacity Capacity Rated Maximum Power consumption gt Power consumption Rated Maximum Revision E e MUZ GEO9NAH MUZ GE12NAH MUZ GE15NAH and MUZ GE18NAH have been added Revision F e MUZ GE09 12 15NA2 MUZ GE09 12 15NAH2 and MUY
35. MUZ GEO9NAH2 MUZ GE12NAH2 MUZ GE15NAH2 MUY GEO9NA MUY GE12NA MUY GE15NA MUY GE18NA MUY GE24NA MUY GEO9NA2 MUY GE12NA2 MUY GE15NA2 9 1 CHANGE IN DEFROST SETTING MUZ Changing defrost finish temperature JS To change the defrost finish temperature cut solder the JS wire of the outdoor inverter P C board Refer to 10 6 1 Defrost finish ae Jumper 41 5 50 F 10 41 5 C 48 9 50 F 10 ds 46 F 8 C 55 13 50 10 64 F 18 C 64 F 18 C 9 2 PRE HEAT CONTROL SETTING PRE HEAT CONTROL When moisture gets into the refrigerant cycle it may interfere the start up of the compressor at low outside temperature The pre heat control prevents this interference The pre heat control turns ON when the discharge temperature thermistor is 68 F 20 or below When pre heat control turns ON compressor is energized About 50 W Pre heat control setting JK ON To activate the pre heat control cut the JK wire of the inverter P C board Refer to 10 6 1 OFF To deactivate the pre heat control solder JK wire of the inverter P C board Refer to 10 6 1 NOTE When the inverter P C board is replaced check the Jumper wires and cut solder them if necessary OBH549G 10 TROUBLESHOOTING MUZ GE09NA MUZ GE12NA MUZ GE15NA MUZ GE18NA MUZ GE24NA MUZ GEO9NA2 MUZ GE12NA2 MUZ GE15NA2 MUZ
36. RT64 FIN TEMP THERMISTOR L61 REACTOR RT65 AMBIENT TEMP THERMISTOR LED LED RT68 OUTDOOR HEAT EXCHANGER LEV EXPANSION VALVE COIL TEMP THERMISTOR OBH549G 15 55 521 CIRCUIT L 2 POWER SUPPLY 20 2300 L 1 F phase 60Hz TO INDOOR UNIT 208 230V S1 ET MUZ GE15NA Li LOW 1 LDV v LDU U P IPM D 1 INVERTER P C BOARD 3 1 CNG42 CNG44 N643 CN724 CN932 9 o o 1 o 9 1 o O 9 3 Ifo o 1 o O 000990 NOTES TRUE ven E cut pobre ae vaa Rug D ME JA did 4p UE unit electric wiring diagram 168 RIGS RI Te for servicing MF 2 Use copper conductors only For field wiring LEV SYMBOL NAME SYMBOL NAME SYMBOL NAME CT CURRENT TRANSFORMER 152 CMC COIL RT68 OUTDOOR HEAT EXCHANGER C61 C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL TEMP THERMISTOR DB61 DB65 DIODE MODULE w COMPRESSOR TB1 TB2 TERMINAL BLOCK DSA SURGE ABSORBER M FAN MOTOR TR821 SWITCHING POWER TRANSISTOR F701 F801 F901 FUSE T3 15AL250V 64 PTC65 CIRCUIT PROTECTION T801 TRANSFORMER H
37. SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL TEMP THERMISTOR DB61 DB65 DIODE MODULE MC COMPRESSOR TB1 TB2 TERMINAL BLOCK DSA SURGE ABSORBER FAN MOTOR TR821 SWITCHING POWER TRANSISTOR F801 F901 FUSE T3 15AL250V 64 PTC65 CIRCUIT PROTECTION 1801 TRANSFORMER 1 802 INTELLIGENT POWER DEVICE RT62 DISCHARGE TEMP IHERMISTOR X64 RELAY IPM 1932 INTELLIGENT POWER MODULE RT64 FIN TEMP THERMISTOR 181 REACTOR RT65 AMBIENT TEMP THERMISTOR MUY GEO9NA2 MUY GE12NA2 10865 I I pep i i gp INVERTER P C BOARD Denen TD cu931 MCU 4 tou P 119999 v CN6 1 IPM 5 LED 1 A CN643 CN724 CN93219 9 9 013 9 10 NOTES lal Fi Pi 1 About the indoor side electric BSZ 6760 RI6S wiring refer to the indoor MF unit electric wiring diagram LEV for servicing 2 Use copper conductors only For field wiring 3 Symbols indicate block SYMBOL NAME SYMBDL NAME SYMBOL NAME C62 C63 SMOOTHING CAPACITOR MC COMPRESSOR TB1 2 TERMINAL BLOCK DB61 DB65 DIODE MODULE MF FAN MOTOR TR821 SWITCHING POWER TRANSISTOR F801 F901 FUSE T3 15AL250V PTC64 65 CIRCUIT PROTECTION T801 TRANSFORMER 1C802 POWER DEVICE RT62 DISCHARGE TEMP THERMISTOR X64 RELAY IPM IC932 POWER MODULE
38. by current protection Current from power outlet is nearing Max fuse size ates 3 time flash 2 5 seconds OFF Frequency drop by high pressure pro tection Temperature of indoor coil thermistor exceeds 131 F 55 C in HEAT mode compressor frequency lowers Frequency drop by defrosting in COOL mode Indoor coil thermistor reads 46 F 8 C or less in COOL mode compressor frequency lowers The unit is normal but check the follow ing Check if indoor filters are clogged Check if refrigerant is short eCheck if indoor outdoor unit air circula tion is short cycled 4 time flash 2 5 seconds OFF Frequency drop by discharge tempera ture protection Temperature of discharge temperature thermistor exceeds 232 F 111 C compressor frequency lowers NOTE 1 The location of LED is illustrated at the right figure Refer to 10 6 1 2 LED is lighted during normal operation The flashing frequency shows the number of times the LED blinks after every 2 5 second OFF Flashing Example When the flashing frequency is 2 0 5 second ON 1 2 5 second OFF Check refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV Refer to 10 5 Check of outdoor thermistors Inverter MUZ GE24NA Rei d MUY GE24NA LED 22 0 5 second ON Intelligent power module MUZ GE09 12 15 18 24NA MUY GE09 12 15 18 24NA Power module Other models OBH5
39. charge R410A Indoor unit Intake air temperature 80 80 67 67 Discharge air temperature 60 56 57 54 Fan speed High 1 280 1 280 Airflow High 498 Wet 498 Wet Outdoor unit Intake air temperature 95 95 Fan speed Airflow OBH549G 38 MSZ GE24NA MSY GE24NA MSZ GE24NA Cooling Heating Capacity 22 500 27 600 SHF 0 75 Input 1 800 2 340 Rated frequency 66 5 82 0 Electrical circuit Indoor unit MSZ GE24NA MSY GE24NA Power supply V Phase Hz 208 230 1 60 Input 0 058 Fan motor current 0 56 0 51 Outdoor unit MUZ GE24NA MUY GE24NA MUZ GE24NA Power supply V phase Hz 208 230 1 60 Input 1 742 2 282 Comp current 7 01 6 34 9 59 8 67 Fan motor current 1 61 1 05 1 13 1 02 Refrigerant circuit Condensing pressure 395 405 Suction pressure 141 102 Discharge temperature 158 171 Condensing temperature Suction temperature 52 33 Comp shell bottom temp Ref pipe length Refrigerant charge R410A Indoor unit Intake air temperature 80 67 Discharge air temperature 56 53 Fan speed High 1 300 Airflow High 634 Wet Outdoor unit Intake a
40. heat exchanger temperature thermistor RT68 Flared connection Strain ae OD RV coil MUZ sn Se EA Capillary tube ceomng O D 0 157 x I D 0 094 Refrigerant pipe 3 8 x 3 15 16 gt Refrigerant flow in cooling with heat insulator 4 0 2 4 100 Refrigerant flow in heating MUZ OBH549G REFRIGERANT PIPING LENGTH and MAX HEIGHT DIFFERENCE Refrigerant piping ft Piping size O D in Model Max Length Max Height difference Gas Tania A B MUZ GE09 12 15NA NA2 MUZ GE09 12 15NAH NAH2 65 40 MUY GE09 12 15NA NA2 MUZ GE18NA MUZ GE18NAH 1 2 MUY GE18NA MUZ GE24NA MUY GE24NA 3 8 GE09 12 1 2 GE15 5 8 Indoor unit Max Height difference B Max Length A gt Outdoor unit ADDITIONAL REFRIGERANT CHARGE R410A oz NOTE Refrigerant piping exceeding 25 ft requires additional refrigerant charge according to the calculation Outdoor unit Refrigerant piping length one way ft precharged 30 40 50 60 Model MUZ GE09NA NA2 MUZ GE09NAH NAH2 1 Ib 12 oz MUY GE09NA NA2 MUZ GE12NA NA2 MUZ GE12NAH NAH2 MUY GE12NA NA2 MUZ GE15NA NA2 MUZ GE15NAH NAH2 MUY GE15NA NA2 Calculation X oz 1 62 5 oz ft x Refrigerant piping length ft 25 Outdoor unit Refrigerant piping length one way ft Model ese precharged 40 50 60 70 80 MUZ GE18NA MUZ GE18N
41. lights up it is OK If LED flashes refer to 10 3 260 325 VDC Check the electric parts in main circuit MUZ GE24NA MUY GE24NA Inverter P C board Disconnect the connector between Solder side compressor and intelligent power module power module 1 Turn ON power supply and press Rectify indoor outdoor EMERGENCY OPERATION switch connecting wire Yes Does the upper lamp of Is there voltage 208 230 VAC Replace the indoor OPERATION INDICATOR on the No between the indoor terminal No electronic control P C indoor unit light up block S1 and S2 board Tes Is there bus bar voltage 294 370 between JP715 and JP30 pod WE v n Re Replace the inverter on the inverter P C board Yes 67 3 No board Refer to 10 6 1 e s CN If LED lights up it is OK Check the electric parts in main circuit If LED flashes refer to 10 3 Yes JP30 JP715 294 370 VDC OBH549G 22 Check of LEV Expansion valve MSZ GE06 09 12 15 18NA MSZ GE24NA MSY GE09 12 15 18NA MSY GE24NA ON the power supply UN Preparation of the remote controller While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button First release RESET button Hold down the other two buttons for another 3 sec onds Make sure that the indicators on the LCD
42. 0 5 O Is the fuse F901 blown on the in verter P C board Yes Check the connection of the connectors 931 CN932 of the outdoor fan motor If the connection is poor make it correct Only for MUZ GE24NA MUY GE24NA Operate the outdoor unit by starting EMERGENCY OPERATION Check the LED indication on the in Check the remedy following LED verter P C board N indication Does the LED flash 10 times Refer to 10 3 Yes 10 time flash Replace the inverter P C board lt OBH549G 2 How to check miswiring and serial signal error Tum OFF the power supply Is there rated voltage in the power supply No Check the power supply No Check the wiring Is there any miswiring poor contact or wire disconnection of the indoor outdoor connect Yes Correct them No Turn OFF the power supply Check once more if the indoor outdoor connecting wire is not miswiring Bridge the outdoor terminal block S2 and 53 1 B Y Turn ON the power supply Y X1 Miswiring may damage indoor electronic control P C board during the operation Be sure to confirm the wiring is correct before the opera tion starts Y Yes Turn ON the power supply Y lt Is there rated voltage between outdoor termi
43. 10 5 Check of compressor start failure Does the compressor operate continuously Yes x1 Intelligent power module MUZ GE09 12 15 18 24NA MUY GE09 12 15 18 24NA Power module Other models OBH549G zs Check of compressor winding e Disconnect the connector between the compressor and intelligent power module power module 1 and measure the resis tance between the compressor terminals lt lt Measurement point gt gt At 3 points BLK WHT BLK RED x Measure the resistance between the lead wires at 3 points WHT RED x1 bod Intelligent power module MUZ GE09 12 15 18 24NA MUY GE09 12 15 18 24NA O Q m Abnormal short Power module Other models Infinite D Abnormal open NOTE Be sure to zero the ohmmeter before measurement E Check of compressor operation time e Connect the compressor and activate the inverter Then measure lt lt Judgement gt gt the time until the inverter stops due to over current Operation method Compressor starts Start heating or cooling operation by pressing EMERGENCY 1 second Abnormal OPERATION switch on the indoor unit failure TEST RUN OPERATION Refer to 7 6 2 seconds Compressor winding short lt lt Measurement gt gt Abnormal Measure the time from the start of compressor to the stop of Compressor lock out compressor due to overcurrent Starting defect Abnormal Poor contact
44. 10 seconds Inverter P C board defect Disconnected connector Abnormal Refrigerant circuit defect Closed valve 10 minutes F Check of compressor start failure Normal fe Confirm that 1 4 is normal Electrical circuit check 1 Contact of the compressor connector 2 Output voltage of inverter P C board and balance of them See 10 5 8 3 Direct current voltage between DB61 and MUZ GE09 12 1518 MUY GE09 12 1518 JP715 and JP30 MUZ GE24 MUY GE24 on the inverter P C board Kes 4 Voltage between outdoor terminal block S1 S2 Does the compressor run for 10 seconds or Check the refrigerant circuit more after it starts Yes Check the stop valve After the compressor is heated with a drier does the compressor start x1 No Replace the compressor x1 Yes A Heat the compressor with a drier for about 20 minutes Compressor start failure Activate pre heat control Do not recover refrigerant Refer to 9 2 PRE HEAT CONTROL SETTING gas while heating Heating part OBH549G ze Check of outdoor thermistors Disconnect the connector of thermistor in the inverter P C board see N below table and measure the resistance of thermistor Is the resistance of thermistor normal Refer to 10 6 1 422 2 64 is We i Reconnect the connector of thermistor Turn ON the
45. 11 1 MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUZ GEO9NA2 MUZ GE12NA2 MUZ GE15NA2 MUZ GEO9NAH MUZ GE12NAH MUZ GE15NAH MUZ GEO9NAH2 MUZ GE12NAH2 MUZ GE15NAH2 MUY GEO9NA MUY GE12NA MUY GE15NA MUY GEO9NA2 MUY GE12NA2 MUY GE15NA2 NOTE Turn OFF power supply before disassembly OPERATING PROCEDURE PHOTOS Removing the cabinet Photo 1 1 Remove the screw fixing the service panel Screws of the top panel Screws of the top panel 2 Pull down the service panel and remove it hs N 9 Remove the screws fixing the conduit cover 4 Remove the conduit cover 5 Disconnect the power supply wire and indoor outdoor B connecting wire lr 6 Remove the screws fixing the top panel 7 Remove the top panel k 8 Remove the screws fixing the cabinet S 9 Remove the cabinet Sous 10 Remove the screws fixing the back panel of the 11 Remove the back panel WW 2 7 3 back 2 panel 7 Photo 2 Screws of the terminal block Screws of the cabinet panel support and the back panel Photo 3 Screw of the cabinet Screw of the service panel Screws of the conduit cover Direction to Conduit cover _ Conduit plate Screws of the cabinet OBH549G 2 OPERATING PROCEDURE PHOTOS 2 Removing the inverter assembly inverter P C board Photo 4 Screws of the 1 Remove the cabinet and panels Refer to 1
46. 2 700 950 900 1 200 EER 1 SEER 3 Cooling O9NA H 13 6 21 0 09NA 13 6 21 0 12NA H 12 5 20 5 12NA H 12 5 20 5 09 2 2 13 6 23 2 09NA2 13 6 23 2 12NA2 H2 12 5 22 7 12NA2 H2 12 5 22 7 HSPF IV 3x4 Heating 09NA H 10 0 09NA2 11 0 09 2 10 1 12NA H 10 0 12NA2 11 4 12NAH2 10 8 COP Heating 1 4 20 3 61 Power supply V phase Hz 208 230 1 60 Max fuse size time delay A 15 Min circuit ampacity A 12 Fan motor 0 50 Compressor KNB073FQDHC KNB092FQAHC 6 6 4 9 6 6 4 9 8 2 6 1 8 2 6 1 Refrigeration oil Model 0 32 NEO22 Refrigerant control Linear expansion valve Sound level 31 Cooling Heating 51 Defrost method Reverse cycle Dimensions 31 1 2 11 1 4 W D H 21 5 8 Weight External finish Munsell 3Y 7 8 1 1 Remote controller Wireless type Control voltage by built in transformer 12 24 Refrigerant piping Not supplied Refrigerant pipe size Min wall thickness Liquid 1 4 0 0315 Gas 3 8 0 0315 Connection method Indoor Flared Outdoor Flared Between the indoor amp outdoor units Height difference 40 Piping length 65 Refr
47. 49G 49 MUZ GE09 12 15 NA NA2 NAH NAH2 MUY GE09 12 15 NA NA2 MUZ 18NA NAH MUY 18NA Flashing 10 3 TROUBLESHOOTING CHECK TABLE Abnormal point Condition Outdoor 7 flash Low discharge tem Temperature of discharge temperature thermistor has been Refer to 10 5 Check of LEV unit oper 2 5 seconds OFF perature protection 122 F 50 C or less for 20 minutes Check refrigerant circuit and refrigerant ates amount 8 time flash PAM protection The overcurrent flows into IGBT Insulated Gate Bipolar transis This is not malfunction PAM protection 2 5 seconds OFF Pulse Amplitude tor TR821 or the bus bar voltage reaches 320 V or more PAM will be activated in the following cases Modulation stops and restarts 1 Instantaneous power voltage drop Zero cross detecting Zero cross signal for PAM control cannot be detected Short time power failure ton circuit 2 When the power supply voltage is high Symptom LED indication Condition Remedy 9 time flash Inverter check mode The connector of compressor is disconnected inverter check Check if the connector of the compres 2 5 seconds OFF mode starts Sor is correctly connected Refer to 10 5 How to check inverter compres sor NOTE 1 The location of LED is illustrated at the right figure Refer to 10 6 1 2 LED is lighted during normal operation The flashing frequency show
48. 6 RELAY 161 REACTOR RT64 FIN TEMP THERMISTOR 2154 REVERSING VALVE COIL LED LED RT65 AMBIENT TEMP THERMISTOR 26H HEATER PROTECTOR 1 1 1 Wendt CURE e wr UN BE 2 CN931 TB CIRCUIT GROUND 4 tuU P ri 9 9 oo Lo BRE CN6l IPM a 5 Lip 1 phase GHz INVERTER P C BOARD if cneas MURS FEL oe 1932 99 9 21 3 91 1 9 9 N T ME Vit duque A A m Fron INDOOR UNIT ou e indoor side electric TT Ton wiring refer to the indoor NS 1 t t t 6 So OE I nts unit electric wiring diagram T64 RT68 16 RTE rj pepo OC12 24V i servicing oe 51 INDOOR UNIT Use copper conductors only For field wiring LEV ERN SYMBOL WANE SYMBOL NAME SYMBOL WANE CT CURRENT TRANSFORMER L62 CMC COIL RT68 OUTDOOR HEAT EXCHANGER C61 C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL TEMP THERMISTOR 0861 0865 DIODE MODULE MC COMPRESSOR T81 TB2 TERMINAL BLOCK DSA SURGE ABSORBER FAN MOTOR TR821 SWITCHING POWER TRANSISTOR 801 F901 FUSE T3 15AL250V PTC64 PTC65 CIRCUIT PROTECTION 1801 TRANSFORMER 1802 INTELLIGENT POWER DEVICE RT62 DISCHARGE TEMP THERMISTOR X64 RELAY IPM 10932 INTELLIGENT POWER MODULE RT64 FIN TEMP THERMISTOR L61 REACTOR RT65 AMBIENT TEMP IHERMISTOR 18 OBH549G MUY GE15NA
49. AH 7 oz MUY GE18NA Calculation X oz 1 08 5 oz ft x Refrigerant piping length ft 25 NOTE Refrigerant piping exceeding 33 ft requires additional refrigerant charge according to the calculation Outdoor unit Refrigerant piping length one way ft precharged 50 60 70 80 Model MUZ GE24NA MUY GE24NA 4 Ib 3 oz 10 06 15 98 21 90 27 82 Calculation X oz 2 96 5 oz ft Refrigerant piping length ft 33 OBH549G zd 7 7 1 PERFORMANCE DATA 1 COOLING CAPACITY MUZ GE09NA MUZ GE09NA2 MUZ GE09NAH MUZ GE09NAH2 MUY GE09NA MUY GE09NA2 MUZ GE12NA MUZ GE12NA2 MUZ GE12NAH MUZ GE12NAH2 MUY GE12NA MUY GE12NA2 MUZ GE15NA MUZ GE18NA MUZ GE24NA MUZ GE15NA2 MUZ GE15NAH MUZ GE18NAH MUZ GE15NAH2 MUY GE15NA MUY GE18NA MUY GE24NA MUY GE15NA2 Indoor air IWB F 71 67 63 71 67 63 71 67 63 71 67 63 71 67 63 NOTE 1 IWB Intake air wet bulb temperature TC Total Capacity x10 Btu h SHC Sensible Heat Capacity x103Btu h TPC Total Power Consumption KW 2 SHC is based on 80 F of indoor Intake air DB temperature 2 COOLING CAPACITY CORRECTIONS Refrigerant piping length one way ft 25 std 40 Outdoor intake air DB temperature F 85 95 105 SHC SHC SHC 7 1 6 6 6 2 8 0 7 4 6 9 8 7 8 1 7 3 8 3 7 8 7 3 9 6 8 9 8 3 10 6 9 9 9 0 10 7 10 0 9 3 12 1 11 2 10 4 13
50. Beeps No beep Beeps Repeated cycle Repeated cycle Repeated cycle 5 OBH549G 5 3 Outdoor unit failure mode table OPERATION INDICATOR upper lamp Indoor unit Abnormal point Failure mode protection LED indication Outdoor P C board Condition Remedy Indoor outdoor unit failure mode recall function Outdoor unit failure mode recall function OFF None Normal 2 time flash 2 5 seconds OFF Outdoor power system Overcurrent protection cut out operates 3 consecutive times within 1 minute after the compressor gets started eReconnect connectors Refer to 10 5 How to check inverter compressor Check stop valve 3 time flash 2 5 seconds OFF Discharge temperature thermistor Defrost thermistor MUZ 1 time flash every 2 5 seconds Fin temperature thermistor 3 time flash 2 5 seconds OFF P C board temperature thermistor 4 time flash 2 5 seconds OFF Ambient temperature thermistor Outdoor heat exchanger temperature thermistor MUZ GE24 MUY GE24 2 time flash 2 5 seconds OFF Thermistor shorts or opens during compressor running Refer to 10 5 Check of outdoor thermistors Defective outdoor thermistors can be identified by checking the blinking pattern of LED 4 time flash 2 5 seconds OFF Overcurrent 11 time flash 2 5 seconds OFF Large current flows into intelligent pow
51. GE09 12 15NA2 have been added Revision G The descriptions of the expansion valve coil have been corrected 10 4 Some descriptions have been modified OBH549G 1 TECHNICAL CHANGES MUZ GEO9NA MUY GEO9NA MUZ GE12NA MUY GE12NA MUZ GE15NA MUY GE15NA MUZ GE18NA MUY GE18NA MUZ GE24NA MUY GE24NA 1 New model MUZ GE15NA gt MUZ GE15NA MUZ GE18NA gt MUZ GE18NA 1 Compressor has been changed 2 Inverter P C board has been changed MUY GE15NA gt MUY GE15NA MUY GE18NA gt MUY GE18NA 1 Compressor has been changed 2 Inverter P C board has been changed MUZ GEO9NA gt MUZ GE09NAH 1 Defrost heater has been added 2 Reactor has been changed 3 Inverter P C board has been changed MUZ GE12NA gt MUZ GE12NAH MUZ GE15NA 0 gt MUZ GE15NAH MUZ GE18NA gt MUZ GE18NAH 1 Defrost heater has been added 2 Inverter P C board has been changed MUZ GEO9NA gt MUZ GEO9NA2 MUZ GE12NA gt MUZ GE12NA2 MUZ GE15NA 0 gt MUZ GE15NA2 MUZ GEO9NAH gt MUZ GE09NAH2 MUZ GE12NAH gt MUZ GE12NAH2 gt gt MUZ GE15NAH MUZ GE15NAH2 MUY GEO9NA MUY GEO9NA2 MUY GE12NA MUY GE12NA2 MUY GE15NA C MUY GE15NA2 1 SEER and HSPF have been added V OBH549G 2 PART NAMES AND FUNCTIONS MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUZ GEO9NA2 MUZ GE12
52. GEO9NAH MUZ GE12NAH MUZ GE15NAH MUZ GE18NAH MUZ GE09NAH2 MUZ GE12NAH2 MUZ GE15NAH2 MUY GEO9NA MUY GE12NA MUY GE15NA MUY GE18NA MUY GE24NA MUY GEO9NA2 MUY GE12NA2 MUY GE15NA2 10 1 1 CAUTIONS ON TROUBLESHOOTING Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for miswiring Take care of the following during servicing 1 Before servicing the air conditioner be sure to turn OFF the main unit first with the remote controller then after con firming 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 of the residual voltage of smoothing capacitor 4 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 5 When connecting or disconnecting the connectors hold the connector housing DO NOT pull the lead wires lt Incorrect gt lt Correct gt TA A Lead wiring EN A housing Troubleshooting procedure 1 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 OPERATION INDICATOR lamp is flashing ON and OFF before starting service work 2 Before s
53. HE D E Q 2 a mo 00 ome d EM o ij 1 2 gg Lr AN B s Sat p d TE ope we s pus m i s ig oe iy Qt TT we EE AN TN Se foto DOR 2 PNE iE 925255 N st dT 6 SE 55 5 AS 8 R S2 8 EL 5 So gt S E PED emu p SE B 6 o 0 89 9 or 25 29 Front side of unit ZO EK lt gt aer SEQ ST Ge o9 25 89 5 S95 ES tot 25 4 Oe 24 5 o co vO EBM OO 56 oO EZ irnsO lt 52 ost VE PFO 80 TE 5 LOO SEO Co 625 6 Ss Zo 5 Z GEO 3 o ox O05 E26 Oy GES at oo 9 sao 509 Of Hof Sc HE gt 2 E SEE asl oS m EC o s 38 38 Defrost thermistor RT61 Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 Fin temperature thermistor RT64 Resistance kQ Resistance kQ 0 0 0 4 14 32 50 68 86 104 32 60 68 86 104 122 140 158 176 194 212 230 248 32 50 68 86 104122 140 158 176 Temperature F Temperature F Temperature F OBH549G MUZ GE24NA MUY GE24NA Resistance kQ Fuse F62 T2 0AL250V Fuse F601 T3 15AL250V MUZ R V coil CN602 208 230 VAC MUZ Signal of out door fan motor CN931 LED Jumper wir
54. HEAT EXCHANGER L61 REACTOR TEMP THERMISTOR ow 281 DB65 I I W pep n INVERTER P C BOARD n METH LDV CN931 MA P Ipo o o o pasi PONER SUPPLY CN61 IPM LED 208 230V 5 Life phase it 3 i CN642 CN644 CN643 C124 CN932 9 9 ol o o 90013 Ifo o 1 o o o o o oj Queene _ 7 7 9 m E Y 7 y JU TB2 NOTES O A e 1 About the indoor side electric D82 T64 RT68 RT65 162 opm wiring refer to the indoor MF 208 230V unit electric wiring diagram LEV Momen for servicing 2 Use copper conductors only For field wiring 3 Symbols indicate LLIJ Terminal block SYMBOL NAME SYMBOL NAME SYMBOL NAME C61 C62 CG3 SMOOTHING CAPACITOR M COMPRESSOR TB1 TB2 TERMINAL BLOCK DB61 DB65 DIODE MODULE MF FAN MOTOR TR821 SWITCHING POWER TRANSISTOR F801 F901 FUSE T3 15AL250V PTC64 PTC65 CIRCUIT PROTECTION T801 TRANSFORMER 1 802 POWER DEVICE RT62 DISCHARGE TEMP THERMISTOR X64 RELAY IPM 1 932 POWER MODULE RT64 FIN TEMP THERMISTOR LED LED RT65 AMBIENT TEMP THERMISTOR LEV EXPANSION VALVE COIL RT68 OUTDOOR HEAT EXCHANGER L6L REACTOR TEMP THERMISTOR OBH549G MUZ GE18NA INVERTER P C BOARD
55. IOPTION PARTS 161 REACTOR RT65 AMBIENT TEMP THERMISTOR MUZ GEO9NA2 MUZ GE12NA2 3 W INVERTER P C BOARD T ID T Tove ds CIRCUIT MC U 1 i I Ipo ooo Y E me CN61 IPM LED pisc n Lips pha 3 1 CN642 CN644 CN643 CN641 CN724 CN932 o 9 o 1 21 o S 9 3 1 21 41 6 A an 9 3 FL F Po FIF 6 sss NDTES 3 RT64 RT65 RT6L RT62 r 1 About the indoor side electric 208 230v wirina refer to the indoor LEV liw unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols indicate 1 block SYMBOL NAME SYMBOL NAME SYMBOL NAME C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL RT68 OUTDOOR HEAT EXCHANGER DB61 DB65 DIDDE MDDULE MC COMPRESSOR TEMP THERMISTOR F701 F801 F901 FUSE T3 15AL250V MF FAN MOTOR 1 TB2 TERMINAL BLOCK H DEFROST HEATERIOPTION PARTS PTC64 PTC65 CIRCUIT PROTECTION TR821 SWITCHING POWER TRANSISTOR 1 802 RT61 DEFROST THERMISTOR T801 TRANSFORMER IPM 1932 POWER MODULE RT62 DISCHARGE TEMP THERMISTOR X63 X64 X66 RELAY 181 REACTOR RT64 FIN TEMP THERMISTOR 2154 REVERSING VALVE COIL LED LED RT65 AMBIENT TEMP THERMISTOR 26H HEATE
56. MITSUBISHI ELECTRIC SPLIT TYPE AIR CONDITIONERS OUTDOOR UNIT SERVICE MANUAL Models MUZ GE09NA MUZ GE09NA2 MUZ GE12NA MUZ GE12NA2 MUZ GE15NA MUZ GE15NA2 MUZ GE18NA MUZ GEO9NAH MUZ GEO9NAH2 MUZ GE12NAH MUZ GE12NAH2 MUZ GE15NAH MUZ GE15NAH2 MUZ GE18NAH Revision G descriptions of the expansion valve coil have been corrected 10 4 Some descriptions have been modified utilized R410A Please void OBH549 REVISED EDITION F No OBH549 REVISED EDITION G MUZ GE24NA MUY GE09NA MUY GE18NA MUY GE09NA2 MUY GE24NA MUY GE12NA MUY GE12NA2 MUY GE15NA Indoor unit service manual MUY GE15NA2 MSZ GE NA MSY GE NA Series OBH548 CONTENTS 1 TECHNICAL CHANGES manaanananasssansssssssaaasssasasan 3 2 PART NAMES AND FUNCTIONS 4 3 SPECIFICATION mannasnsaasassassanasssanasansnasasssassasasnasan 6 4 OUTLINES AND DIMENSIONS 10 5 WIRING DIAGRAM mansnassnsasssanaanasansananasannsananasan 13 6 REFRIGERANT SYSTEM DIAGRAM 25 7 DATA 28 gt 8 ACTUATOR CONTROL muanasasssaanasanasnasaanasasasanan 42 MUZ GE09NA NA MUZ GE09NAH NAH2 9 SERVICE FUNCTIONS KARSA SN NAN NN WA 53 N WS n Bs 5 43 MUZ GE12NA NA2
57. MPRESSOR TEMP THERMISTOR F701 FAO F301 FUSE T3 15AL250V M FAN MOTOR TB1 TB2 TERMINAL BLOCK H DEFROST HEATER PTC64 PTC65 CIRCUIT PROTECTION TR821 SWITCHING POWER TRANSISTOR IC802 POWER DEVICE RT61 DEFROST THERMISTOR T801 TRANSFORMER IPM IC932 POWER MODULE RT62 DISCHARGE TEMP THERMISTOR X63 X64 X66 RELAY 161 REACTOR RT64 FIN TEMP THERMISTOR 2154 REVERSING VALVE COIL LED LED RT65 AMBIENT TEMP THERMISTOR 26H HEATER PROTECTOR 14 OBH549G MUY GEO9NA MUY GE12NA gp 7560 c ri gk UV 1 m denuo xs E cl yam J 5 Lippe phase 60Hz P INVERTER BOARD N642 N644 CN643 CN641 CN724 ave NOR NT IER qu 222 99 9 21 9 oo 912 1 oo gel io 99999 0 NOTES d 1 About the indoor side electric 4 4 4 4 EL From INDOOR UNIT wiring refer to the indoor 55 Pz t d d A SS US unit electric wiring diagram T64 T68 RT65 Te 52b 12 24V for servicing MF 51 0 INDOOR UNIT 2 Use copper conductors only For field wiring LEV COMECTING WIRES SYMBOL SYMBOL NAME SYMBOL NAME Sie CT CURRENT TRANSFORMER L62 CMC COIL RTG OUTDOOR HEAT EXCHANGER C62 C63
58. N641 Defrost thermistor MUZ and discharge temperature thermistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor CN721 R V coil MUZ CN724 LEV CN931 CN932 Fan motor 9 Remove the compressor connector CN61 4 Remove the screws fixing the heat sink support and the sep arator 5 Remove the fixing screws of the terminal block support and the back panel 6 Remove the inverter assembly 7 Remove the screw of the ground wire and screw of the terminal block support 8 Remove the heat sink support from the P C board support 9 Remove the screw of the inverter P C board and remove the inverter P C board from the P C board support Screw of the heat sink support and the separator Screws of the terminal block support and the back panel Screws of the reactor Photo 4 Inverter assembly Heat sink Inverter P C board Screw of the terminal block Hook of the P C bon suppgrt board support Screw of the ground wire Hook of the PC Screw of the P C Terminal block board support board fixture support I Heat sink support 3 Removing R V coil 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connectors lt Inverter P C board gt CN721 R V coil MUZ 3 Remove the R V coil OBH549G de Photo 5 R V coil MUZ Brazed parts of 4 way valve OPERATING PROCEDURE PHOTOS 4 R
59. NA MUZ GE15NA2 MUZ GE15NAH MUZ GE15NAH2 MUY GE15NA MUY GE15NA2 MUZ GE18NA MUZ GE24NA MUZ GE18NAH MUY GE18NA MUY GE24NA 5 seconds ON Y Y 400 4 0 Compressor OFF ON Outdoor fan motor OFF 8 2 R V COIL CONTROL MUZ Heating on Ayesha ek thet a n Lee ON Cooling Sp Aap E a aa OFF NOTE The 4 way valve reverses for 5 seconds right before start up of the compressor lt COOL gt lt HEAT gt 5 seconds 5 seconds ompressor OFF i ON NEM E OFF H Outdoor fan ON motor OF 8 3 RELATION BETWEEN MAIN SENSOR AND ACTUATOR R V coil Actuator Sensor Purpose Outdoor fan R V coil Indoor fan Compressor motor MUZ motor Discharge temperature thermistor Protection O Indoor coil temperature thermistor Cooling Coil frost prevention Heating High pressure protec tion Defrost thermistor MUZ Heating Defrosting Fin temperature thermistor Protection Ambient temperature thermistor Cooling Low ambient tempera ture operation Outdoor heat exchanger tem perature thermistor OBH549G Cooling Low ambient tempera ture operation Cooling High pressure protec tion 42 9 SERVICE FUNCTIONS MUZ GE09NA MUZ GE12NA MUZ GE15NA MUZ GE18NA MUZ GE24NA MUZ GEO9NA2 MUZ GE12NA2 MUZ GE15NA2 MUZ GEO9NAH MUZ GE12NAH MUZ GE15NAH MUZ GE18NAH
60. NA2 MUZ GE15NA2 MUZ GEO9NAH MUZ GE12NAH MUZ GE15NAH MUZ GEO9NAH2 MUZ GE12NAH2 MUZ GE15NAH2 MUY GEO9NA MUY GE12NA MUY GE15NA MUY GEO9NA2 MUY GE12NA2 MUY GE15NA2 Air inlet back and side Airoutlet Drain outlet MUZ GE18NA MUZ GE18NAH MUY GE18NA j Air inlet back and side Air outlet Drain outlet OBH549G i MUZ GE24NA MUY GE24NA Airinlet back and side Piping i Drain hose i Air outlet Drain outlet OBH549G 3 SPECIFICATION Outdoor unit model MUZ GEO9NA MUZ GEO9NA2 MUZ GEO9NAH MUZ GE09NAH2 MUY GE09NA MUY GE09NA2 MUZ GE12NA MUZ GE12NA2 MUZ GE12NAH MUZ GE12NAH2 MUY GE12NA MUY GE12NA2 Capacity Rated Minimum Maximum Cooling 441 9 000 3 800 12 200 9 000 3 800 12 200 12 000 3 800 13 600 12 000 3 800 13 600 Heating 47 1 10 900 4 500 14 100 14 400 5 500 18 100 Capacity Rated Maximum Heating 17 2 6 600 8 700 8 800 11 200 Power consumption Rated Minimum Maximum Cooling 441 660 205 1 200 660 205 1 200 960 205 1 300 960 205 1 300 Heating 47 1 760 255 1 200 1 170 340 1 660 Power consumption Rated Maximum Heating 17
61. NGER DB61 DB65 DIODE MODULE MC COMPRESSOR TEMP THERMISTOR F701 F801 F901 FUSE T3 15AL250V FAN MOTOR 1 TB2 TERMINAL BLOCK H DEFROST HEATERIOPTION PARTSIPTC64 PTC65 CIRCUIT PROTECTION TR821 SWITCHING POWER TRANSISTOR IC802 POWER DEVICE RT61 DEFROST THERMISTOR T801 TRANSFORMER IPM IC932 POWER MODULE RT62 DISCHARGE TEMP THERMISTOR X63 X64 X66 RELAY L61 REACTOR RT64 FIN TEMP THERMISTOR 2154 REVERSING VALVE OIL LED LED RT65 AMBIENT TEMP THERMISTOR 26H HEATER PROTECTORIOPTION PARTS OBH549G 16 Fi T PHPF t TBI ga LS POWER SUPPLY Ee a From INDOOR UNIT CONNECTING WIRE g From INDOOR UNIT 5 1 CONNECTING WIRES 525 TO INDOOR UNIT S1p CONNECTING WIRES 208 230V 1 phase 609 OPTION PARTS MUZ GE15NA2 2 r DUtU P CN931 5 INVERTER P C BOARD LED 22 BK BLK ak mk P pap qe l2 2 p i 9 4 Tei CIRCUIT LP SUPPLY 11 3 493299 1 2190 1 642 CNG43 CN724 31 21 41 NOTES About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing
62. PANSION VALVE COIL RT6B OUTDOOR HEAT EXCHANGER L61 REACTOR TEMP THERMISTOR 22 OBH549G CIRCUIT BREAKER INDOOR UNIT CONNECTING WIRES 53 Ml 51 a TO INDOOR UNIT CONNECTING WIRES phase 6012 INDOOR UNIT CONNECTING WIRE MUZ GE24NA POWER SUPPLY 208 230V 1 phase 60 7 CIRCUIT nent 7 ae BREAKER gv GROUND g TO INDOOR UNIT 1 208 230V phase 60Hz 51 ME 5 gl a m m D gt lt mM en BOARD INDOOR UNIT eroe 5 CONNECTING WIRES gii CN671 DC12 24V 218 M5 Sp NC TTE CONNECTING WIRE HE T i3 L RT61 RT62 RT68 RT65 RT64 E SYMBOL NOTES 1 About the indoor side electric wiring 3 SMODTHING CAPACITOR PTCGA CIRCUIT PROTECTION refer to the indoor unit electric wiring diagram for servicing SE T3 15AL250V 65 CIRCUIT PROTECTION gsr copper conductors oniyttor field Kiring SE T2AL250V RT61 DEFROST THERMISTOR SE T6 3AL250V RT62 DISCHARGE TEMP THERMISTOR SE T3 15AL250V IRT64 FIN TEMP THERMISTOR SE CT3 15AL250V IRT65 AMBIENT TEMP THERMISTOR T a OUTDOOR HEAT EXCHANGER INTELLIGENT POWER MODULE TEMP THERMISTOR REACTOR TBL TBA TERMINAL BLOCK EXPANSION VALVE COIL 1801 TRANSFORMER COMPRESSOR RE L AY FAN MOTOR X64 RELAY POWER FACTOR CONTROLLER 2154
63. PROCEDURE PHOTOS 2 Removing the inverter assembly inverter P C board 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following con nectors lt Inverter P C board gt Inverter P C CN602 R V MUZ board Ground wires CN671 Defrost thermistor MUZ discharge temperature thermistor and outdoor heat exchanger temperature thermistor CN672 Ambient temperature thermistor CN724 LEV CN931 CN932 Fan motor 3 Remove the compressor connector 4 Remove the screws fixing the relay panel 5 Remove the relay panel 6 Remove the ground wires and the lead wires of the inverter P C board 7 Remove the screw of the PB support 8 Remove the inverter P C board from the relay panel Screw of the relay panel Screws of the PB support Screws of the PB support Screws of the relay panel 3 Removing R V coil 1 Remove the cabinet and panels Refer to 1 Photo 5 2 Disconnect the following connector Inverter P C board Screw of the CN602 R V coil MUZ R V coil MUZ 3 Remove the R V coil 557 Brazed parts of j L 4 way valve OBH549G a OPERATING PROCEDURE PHOTOS 4 Removing the discharge temperature thermistor defrost thermistor outdoor heat exchanger tempera ture thermistor and ambient temperature thermistor 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reac
64. R PROTECTORIOPTION PARTS OBH549G 13 OPTION PARTS SUPPLY 8 2300 se TO INDOOR UNIT MUZ GEO9NAH MUZ GE12NAH OA TINT on EL vn BK SET E 2 2 12 zx 0865 2 1 1 1 2 TBI pon Senovno F POWER SUPPLY TPM ivan pe phase INVERTER P C BOARD 3 ow cuu c CN93219 9 10 o 1 o o o3 1 5 o 1 o o o o 4 1 From INDOOR UNIT 25 4 a elf en ren A WIRE NOTES 1 About the indoor side electric At r Fron UNIT wiring refer to the indoor 6s t t t t S3F CONNECTING WIRES unit electric wiring diagram RIS RT6I RTG gld ti far servicing MF TO INDOOR UNIT 2 Use copper co
65. T MUZ GE NAH NAH2 Compressor 74 6 8 10 0 9 3 8 5 12 5 MUY GE18NA MUY GE18NA m 10 5 19 2 10 5 19 2 Refrigeration oil Model Refrigerant control Linear expansion valve Cooling Heating 56 Defrost method Reverse cycle 33 1 16 Dimensions D in 13 H in 33 7 16 Weight 119 External finish Munsell 3Y 7 8 1 1 Remote controller Wireless type Control voltage by built in transformer 12 24 Refrigerant piping Not supplied Refrigerant pipe size Liquid in 1 4 0 0315 Min wall thickness Gas in 1 2 0 0315 Indoor Flared Outdoor Flared Between the indoor amp Height difference 40 50 outdoor units Piping length 65 100 Refrigerant charge R410A 2 Ib 9 oz 3 Ib 7 oz NOTE Test conditions are based on AHRI 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 FDB 60 FWB Outdoor 17 FDB 15 FWB 0 45 NEO22 Sound level 1 Connection method OBH549G Outdoor unit model MUZ GE24NA MUY GE24NA Cooling 1 Capacity 22 500 8 200 31 400 22 500 8 200 31 400 Rated Minimum Maximum Heating 47 1
66. Unit operates COOL mode even if it is set to HEAT mode Disconnect connector between the compressor and intelligent power module Is there 208 230 VAC between CN721 MUZ power module x1 GE09 12 15 18 CN602 MUZ GE24 D and Replace the inverter Turn ON the power supply and press on the inverter P C board 3 minutes after the P C board EMERGENCY OPERATION switch twice power supply is turned ON HEAT mode yes Replace the 4 way valve x1 Intelligent power module MUZ GE09 12 15 18 24NA MUY GE09 12 15 18 24NA Power module Other models OBH549G 9 Unit operates HEAT mode even if it is set to COOL mode Disconnect connector between the compressor and intelligent power module power module 1 Turn ON the power supply and press OPERATION switch once COOL mode Check of outdoor fan motor Is there 230 VAC between CN721 MUZ GE09 12 15 18 CN602 MUZ GE24 and Replace the inverter the inverter P C board 3 minutes after Yes P C board the power supply is turned ON No Replace the 4 way valve Intelligent power module MUZ GE09 12 15 18 24NA MUY GE09 12 15 18 24NA Power module Other models x1 Disconnect the connectors CN931 and CN932 from the inverter P C board Check the connec N tion between the connector CN931 and CN932 Is the resistance between each ter minal of outdoor fan motor nor
67. V phase 60 CN93219 9 0 1 o o 1 o o 9 3 1 o 9 1 o 9000 NOTES 1 About the indoor side electric 5 t t wiring refer to the indoor RT68 765 RIEL RT unit electric wiring diagram MF for servicing LEV 2 Use copper conductors only For field wiring SYMBOL NAME SYMBOL NAME SYMBOL NAME C61 C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL RT68 OUTDOOR HEAT EXCHANGER 0861 0865 DIODE MODULE M COMPRESSOR TEMP THERMISTOR F701 F801 F901 FUSE T3 15AL250V FAN MOTOR TB1 2 TERMINAL BLOCK H DEFROST HEATER PTC64 PTC65 CIRCUIT PROTECTION TR821 SWITCHING POWER TRANSISTOR IC802 POWER DEVICE RT61 DEFROST THERMISTOR 1801 TRANSFORMER IPM 1C932 POWER MODULE RT62 DISCHARGE TEMP THERMISTOR X63 X64 X66 RELAY L61 REACTOR RT64 FIN TEMP THERMISTOR 2154 REVERSING VALVE COIL LED LED RT65 AMBIENT TEMP THERMISTOR 26H HEATER PROTECTOR 17 OBH549G rin Fron INDOOR UNIT CONNECTING WIRE From INDOOR UNIT Em CONNECTING WIRES S2 L DIN 0 TO INDOOR Slp J 208 230V 1 phase 60 1 NIT WIRES 1 MUZ GE15NAH2
68. WB temperature F MUZ GE24NA DNN DON DB temperatur gm i take Indoor in Total power consumption kW Total power consumption Airflow 738 CFM rature CF ir DB tempe oor intake al Total power consumption 0 10 20 30 40 50 60 70 Outdoor intake air WB temperature F This value of frequency is not the same as the actual frequency in operating Refer to 7 5 and 7 6 for the relationships between frequency and capacity 7 3 CONDENSING PRESSURE Cooling Data is based on the condition of indoor humidity 50 Air flow should be set to High speed MUZ GEO9NA MUZ GE09NA2 MUZ GE09NAH MUZ GE09NAH2 MUY GEO9NA MUY GEO9NA2 PSIG PSIG 440 86 temperature CF o 400 E 2 u U 75 o 360 r U 8 320 E v 140 280 T 1205870 75 80 85 90 95 100 105 F Outdoor ambient temperature Outdoor ambient temperature OBH549G MUZ GE12NA MUZ GE12NAH MUY GE12NA PSIG MUZ GE12NA2 MUZ GE12NAH2 MUY GE12NA2 420 380 340 Condensing pressure 300 08 60 6870 MUZ GE15NA MUZ GE15NAH MUY GE15NA PSIG 440 999 75 80 85 90 95 100
69. circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG 4 Detach the brazed part of the suction and the discharge pipes connected with compressor 5 Remove the compressor nuts 6 Remove the compressor 7 Detach the brazed part of the pipes connected with 4 way valve Brazed parts of 4 way valve OBH549G 11 2 MUZ GE18NA MUZ GE18NAH MUY GE18NA OPERATING PROCEDURE NOTE Turn OFF power supply before disassembly PHOTOS 1 Removing the cabinet 1 Remove the screws of the service panel 2 Remove the screws of the top panel 3 Remove the screw of the valve cover 4 Remove the service panel 5 Remove the top panel 6 Remove the valve cover 7 Disconnect the power supply and indoor outdoor connect ing wire 8 Remove the screws of the cabinet 9 Remove the cabinet 10 Remove the screws of the back panel 11 Remove the back panel OBH549G Photo 1 Screw of top panel Screws of the cabinet i TH innis ULL fnn 7 cabinet Photo 2 Screws of the top panel Screws ofthe cabinet Screw ofthe service panel Screws of the back panel OPERATING PROCEDURE PHOTOS 2 Removing the inverter assembly inverter P C board 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following con nectors lt lnverter P C board gt C
70. dual voltage of smoothing capacitor Electromagnetic noise enters into TV sets or radios Is the unit grounded No Ground the unit Yes Is the distance between the antennas and the indoor unit within 9 91 ft or is the distance between the antennas and Yes the outdoor unit within 9 91 ft No Extend the distance between the antennas and the indoor unit and or the antennas and the outdoor unit radios and the indoor unit within 3 28 Extend the distance between the TV sets and or ft or is the distance between the TV radios and the indoor unit or the TV sets or sets or radios and the outdoor unit Yes radios and the outdoor unit within 9 91 ft Is the distance between the TV sets or Are antennas damaged Is the coaxial cable damaged Replace or repair the antenna Is there any poor contact the Yes Replace or repair the coaxial cable na wiring j Is the indoor outdoor connecting wire Extend the distance between the indoor outdoor of the air conditioner and the wiring of connecting wire of the air conditioner and the wir the antennas close Yes ing of the antennas Even if all of the above conditions are fulfilled the electromagnetic noise may enter depending on the electric field strength or the installation condition combination of specific conditions such as antennas or wiring Check t
71. e for changing defrost Output to drive outdoor fan motor CN932 Fuse F901 T3 15AL250V a Fuse F880 T3 15AL250V setting JS MUZ Jumper wire for pre heat control setting JK Defrost thermistor RT61 CN671 MUZ Discharge temperature thermistor RT62 CN671 Outdoor heat exchanger temperature thermistor RT68 CN671 Ambient temperature thermistor RT65 Defrost thermistor RT61 Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 0 4 14 32 50 68 Temperature F OBH549G 86 104 Resistance kQ CN672
72. e pipes until the pressure gauge shows 0 PSIG 5 Detach the brazed part of the suction and the discharge pipes connected with compressor 6 Remove the compressor nuts 7 Remove the compressor 8 Detach the brazed parts of 4 way valve and pipes Photo 5 Brazed part of the Discharge temperature discharge pipe thermistor Brazed part of the suction pipe OBH549G 11 3 MUZ GE24NA MUY GE24NA NOTE Turn OFF power supply before disassembly OPERATING PROCEDURE PHOTOS 1 Removing the cabinet Photo 1 1 Remove the screws of the service panel Screws of the top panel 2 Remove the screws of the top panel 3 Remove the screw of the valve cover 4 Remove the service panel 5 Remove the screws fixing the conduit cover 6 Remove the conduit cover 7 Remove the top panel 8 Remove the valve cover 9 Disconnect the power supply and indoor outdoor con necting wire 10 Remove the screws of the cabinet 11 Remove the cabinet 12 Remove the screws of the back panel 13 Remove the back panel Photo 2 Screws of the k Screws of the back panel top panel Screws of the back panel Scr ws of the Screws of the cabinet cabinet Screws of the back Screws of the conduit cover 77 Conduit plate Screws of Screws the service of the panel cabinet Screws ofthe Screws of Screw of back panel the back the valve panel cover OBH549G 9 OPERATING
73. ease the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller Releasing the failure mode recall function Y Repair the failure parts Deleting the memorized abnormal condition After repairing the unit recall the failure mode again according to Set function mentioned above Press OPERATE STOP ing up the failure mode recall F button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted Release the failure mode recall function according to Releasing the failure mode recall function mentioned above NOTE 1 Make sure to release the failure mode recall function after it is set up otherwise the unit cannot operate properly 2 If the abnormal condition is not deleted from the memory the last abnormal condition is kept memorized X2 Blinking pattern when the indoor unit is abnormal Blinking at 0 5 Blinking at 0 5 2 5 second OFF second interval 2 5 second OFF second interval aA Ot E a C Tas 22 Sn gt gt lt lt e lt 7 lt 4 gt B pie Beeps Beeps i Beeps Beeps Repeated cycle Repeated cycle Repeated cycle X3 Blinking pattern when the outdoor unit
74. els OBH549G TB 10 3 TROUBLESHOOTING CHECK TABLE Symptom LED indication Abnormal point Condition Condition Remedy Outdoor unit does not oper ate 1 time flash every 2 5 seconds Outdoor power sys tem Overcurrent protection cut out operates 3 consecutive times with in 1 minute after the compressor gets started or failure of restart of compressor has repeated 24 times Reconnect connector of compressor Refer to 10 5 How to check inverter compressor Check stop valve Outdoor thermistors Discharge temperature thermistor fin temperature thermistor de frost thermistor outdoor heat exchanger temperature thermistor P C board temperature thermistor or ambient temperature therm istor shorts or opens during compressor running Refer to 10 5 Check of outdoor thermistors Outdoor control sys tem Nonvolatile memory data cannot be read properly The upper lamp of OPERATION INDICATOR of the indoor unit lights up or flashes 7 times Replace inverter P C board 6 time flash 2 5 seconds OFF Serial signal The communication fails between the indoor and outdoor unit for 3 minutes Refer to 10 5 How to check miswir ing and serial signal error 11 time flash 2 5 seconds OFF Stop valve Closed valve Closed valve is detected by compressor current Check stop valve 14 time flash 2 5 seconds OFF Outdoo
75. emoving the discharge temperature thermistor Photo 6 defrost thermistor outdoor heat exchanger tempera Outdoor heat Ambient tem ture thermistor and ambient temperature thermistor exchanger tempera perature 1 Remove the cabinet and panels Refer to 1 ture thermistor thermistor 2 Disconnect the lead wire to the reactor and the following connectors Inverter P C board CN641 Defrost thermistor MUZ and discharge tempera ture thermistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor 3 Pull out the discharge temperature thermistor from its holder 4 Pull out the defrost thermistor from its holder 5 Pull out the outdoor heat exchanger temperature thermistor from its holder 6 Pull out the ambient temperature thermistor from its holder Removing outdoor fan motor 1 Remove the top panel cabinet and service panel Refer to 1 2 Disconnect the following connectors Inverter P C board CN931 and CN932 Fan motor Defrost thermistor MUZ 3 Remove the propeller Photo 7 4 Remove the screws fixing the fan motor 5 Remove the fan motor Screws of the outdoor fan motor Removing the compressor and 4 way valve 1 Remove the top panel cabinet and service panel Refer to 1 Photo 8 2 Remove the back panel Refer to 1 3 Remove the inverter assembly Refer to 2 4 Recover gas from the refrigerant circuit NOTE Recover gas from th
76. er module power module 1 eReconnect compressor connector Refer to 10 5 How to check inverter compressor eCheck stop valve Compressor synchronous abnormality Compressor start up failure protection 12 time flash 2 5 seconds OFF Waveform of compressor current is distorted eReconnect compressor connector Refer to 10 5 How to check inverter compressor 5 time flash 2 5 seconds OFF Discharge temperature Temperature of discharge temperature thermistor exceeds 241 F 116 C compressor stops Compressor can restart if discharge temperature thermistor reads 212 F 100 C or less 3 minutes later Check refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV 6 time flash 2 5 seconds OFF High pressure Temperature of indoor coil thermistor exceeds 158 F 70 C in HEAT mode MUZ only Temperature of outdoor heat exchanger temperature thermistor exceeds 158 F 70 C in COOL mode eCheck refrigerant circuit and refrigerant amount Check stop valve 7 time flash 2 5 seconds OFF Fin temperature P C board temperature 7 time flash 2 5 seconds OFF Temperature of fin temperature thermistor on the inverter P C board exceeds 167 176 F 75 80 C or temperature of P C board temperature thermistor on the inverter P C board exceeds 158 167 F 70 75 C eCheck around outdoor unit eCheck outdoor unit air passage Re
77. ermistor OBH549G 52 OPERATING PROCEDURE PHOTOS 4 Removing the discharge temperature thermistor defrost thermistor outdoor heat exchanger tempera ture thermistor and ambient temperature thermistor 1 Remove the cabinet and panels Refer to 1 P ult 2 Disconnect the lead wire to the reactor and the following a Outdoor heat connectors a exchanger tempera Inverter P C board 1A ture thermistor CN641 Defrost thermistor MUZ and discharge tempera 27 3 ture thermistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor 3 Pull out the discharge temperature thermistor from its holder Photo 6 4 Pull out the defrost thermistor from its holder 5 Pull out the outdoor heat exchanger temperature thermistor from its holder 6 Pull out the ambient temperature thermistor from its holder Defrost thermistor Removing outdoor fan motor Photo 8 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connectors lt Inverter P C board gt CN931 CN932 Fan motor 3 Remove the propeller nut 4 Remove the propeller 5 Remove the screws fixing the fan motor 6 Remove the fan motor Screws of the outdoor fan motor Propeller 6 Removing the compressor and 4 way valve Photo 9 1 Remove the cabinet and panels Refer to 1 2 Remove the inverter assembly Refer to 2 3 Recover gas from the refrigerant
78. ervicing check that the connector and terminal are connected properly 3 When the electronic control P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 Refer to 10 2 and 10 3 OBH549G T 10 2 FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once Even though LED indication listed on the troubleshooting check table 10 3 disappears the memorized failure details can be recalled 1 Flow chart of failure mode recall function for the indoor outdoor unit MSY GE09 12 15 18NA Operational procedure The cause of abnormality cannot be found because the abnormality does not recur he failure mode recall function Y Turn ON the power supply lt Preparation of the remote controller gt While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button First release RESET button Hold down the other two buttons for another 3 seconds Make sure that the indicators on the LCD screen shown in the right figure are all displayed Then release the buttons Setting up MITSUBISHI ELECTRIC Y Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 7X1 Y
79. fer to 10 5 Check of outdoor fan motor 8 time flash 2 5 seconds OFF Outdoor fan motor Outdoor fan has stopped 3 times in a row within 30 seconds after outdoor fan start up Refer to 10 5 0 of outdoor fan motor Refer to 10 5 0 of inverter P C board 9 time flash 2 5 seconds OFF Nonvolatile memory data 5 time flash 2 5 seconds OFF Nonvolatile memory data cannot be read properly eReplace the inverter P C board Power module MUZ GE24 MUY GE24 6 time flash 2 5 seconds OFF The interphase short circuit occurs in the output of the intelligent power module IPM power module IPM x1 The compressor winding shorts circuit Refer to 10 5 5 How to check inverter compressor 10 time flash 2 5 seconds OFF Discharge temperature Temperature of discharge temperature thermistor has been 122 50 or less for 20 minutes Refer to 10 5 Check of LEV eCheck refrigerant circuit and refrigerant amount NOTE Blinking patterns of this mode differ from the ones of Troubleshooting check table 10 3 1 Intelligent power module MUZ GE09 12 15 18 24NA MUY GE09 12 15 18 24NA Power module Other models OBH549G 47 3 Outdoor unit failure mode table OPERATION Indoor INDICATOR Abnormal point LED indication Condition Remed outdoor unit failure mode upper lamp Failure mode protection Outdoor P C b
80. he followings before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indoor outdoor unit of the air conditioner indoor outdoor wiring grounding wire antennas wiring from antennas receiver Electric field intensity of the broadcast station affected by the electromagnetic noise Presence or absence of amplifier such as booster Operation condition of air conditioner when the electromagnetic noise enters in 1 Turn OFF the power supply once and then turn ON the power supply In this situation check for the electromagnetic noise 2 Within 3 minutes after turning ON the power supply press OPERATE STOP ON OFF button on the remote controller for power ON and check for the electromagnetic noise 3 After a short time 3 minutes later after turning ON the outdoor unit starts running During operation check for the elec tromagnetic noise 4 Press OPERATE STOP ON OFF button on the remote controller for power OFF when the outdoor unit stops but the indoor outdoor communication still runs on In this situation check for the electromagnetic noise OBH549G s 10 6 TEST POINT DIAGRAM AND VOLTAGE 1 Inverter P C board
81. igerant charge R410A NOTE Test conditions are based on AHRI 210 240 384 Rating conditions Cooling Indoor 80 FDB 67 FWB Outdoor 95 FDB 75 FWB Heating Indoor 70 FDB 60 FWB Outdoor 47 FDB 43 FWB Heating Indoor 70 FDB 60 FWB Outdoor 17 FDB 15 FWB 3 2 OBH549G 1 Ib 12 oz 2 9 oz MUZ GE15NA MUZ GE15NA MUY GE15NA MUZ GE18NA Outdoor unit model MUZ GE15NA2 MUY GE15NA MUZ GE18NA MUZ GE15NAH MUY GE15NA2 MUZ GE18NAH MUZ GE15NAH2 Cooling s 14 000 14 000 17 200 17 200 Capacity T 3 100 18 200 3 100 18 200 3 700 18 700 3 700 18 700 Rated Minimum Maximum 18 000 21 600 Heating 47 1 4 800 20 900 3 500 25 200 x Capacity Heating 17 2 11 300 15 900 13 400 17 200 Rated Maximum Power consumption Cooling sc 1 080 160 2 000 1 080 160 2 000 1 640 240 2 070 1 640 240 2 070 Rated Minimum Maximum Heating 47 1 1 600 270 2 010 1 900 230 2 680 5 27 Heating 17 3 2 1 150 1 950 1 450 2 080 15NA H 13 0 21 0 15 13 0 21 0 Seen 1 Cooling 15NA2 H2 an 15NA2IH2 _ a 15 10 0 HSPF IV 4 Heating 15NA2 11 2 10 0 15NA2 H2 10 8 COP Heating 1 3 30 3 33 Power supply V phase Hz 208 230 1 60 Max fuse size time delay A 15 Min circuit ampacity A 12 14 Fan motor 0 50 0 93 MUZ MUY GE NA SNB130FQBH MUZ MUY GE NA2 MUZ MUY GE NA SNB130FQBH
82. ir temperature 95 Fan speed Airflow OBH549G 39 7 5 CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY MUZ GEO9NA MUZ GE09NA2 MUZ GEO9NAH MUZ GEO9NAH2 MUY GEO9NA Correction of Cooling capacity 15 2 8 o 510 5 5 E 8 _ 5 Pos 8 8 100 150 Hz 0 5 m o S o MUY GE09NA2 Correction of Cooling total input 150 Hz The frequency of compressor The operational frequency of compressor The operational frequency of compressor Capacity correction factors a o 2 MUZ GEO9NA MUZ GE09NA2 MUZ GEO9NAH MUZ GEO9NAH2 Correction of Heating capacity Correction of Heating total input a t o o Input correction factors a 0 100 150 Hz 0 50 100 150 Hz The operational frequency of compressor MUZ GE12NA MUZ GE12NA2 MUZ GE12NAH MUZ GE12NAH2 MUZ GE12NA MUZ GE12NA2 MUY GE12NA MUY GE12NA2 MUZ GE12NAH MUZ GE12NAH2 Correction of Cooling capacity Correction of Cooling total input Correction of Heating capacity Correction of Heating total input 15 15 5 15 o 8 p 8 g 8 8 8 1 0 S 10 510 S19 8 5 8 5 E 9 o 5 205 8 05 205 905 8 5 9 5 a a c lt 100 150 Hz 100 150 Hz 100 150 Hz O 50 100 150 Hz The operational frequency of compressor The operational frequency of compressor The frequency of compressor
83. is abnormal Blinking at 0 5 second interval Blinking at 0 5 second interval 2 5 second OFF 3 second ON 2 5 second OFF 3 second ON No bee Beeps Repeated cycle OBH549G No bee Beeps Repeated cycle 45 Heee OFF de IR UR lt gt Aep 2 Repeated cycle 2 Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal Check if outdoor unit is abnormal according to the following procedures Y Make sure that the remote controller is set to the failure mode recall func tion 1 Regardless of normal or abnormal condition 2 short beeps are emitted as the signal is received Y With the remote controller headed towards the indoor unit press TOO COOL or TOO WARM button to adjust the set temperature to 77 F 25 C x1 Y Does the upper lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0 5 seconds Blinks The outdoor unit is abnormal Beep is emitted No at the same timing as the blinking of the upper OFF lamp of OPERATION INDICATOR lamp X2 Yes ee The outdoor unit is abnormal Check the blinking pattern and identify the abnormal point by referring to outdoor unit failure mode table 10 2 3 Make sure to check at least two consecutive blinking cycles 2 The outdoor unit is normal
84. it 1 phase 60 Hz 2 OPERATION Intake air temperature F Condition Outdoor WB DB Standard temperature 67 95 Maximum temperature 73 115 Minimum temperature 57 14 Maximum humidity Standard temperature 60 47 67 Minimum temperature 60 Cooling OBH549G 4 OUTLINES AND DIMENSIONS MUZ GEO9NA MUZ GE12NA MUZ GE15NA Unit inch MUZ GEO9NA2 MUZ GE12NA2 MUZ GE15NA2 MUZ GEO9NAH MUZ GE12NAH MUZ GE15NAH MUZ GEO9NAH2 MUZ GE12NAH2 MUZ GE15NAH2 MUY GEO9NA MUY GE12NA MUY GE15NA MUY GEO9NA2 MUY GE12NA2 MUY GE15NA2 REQUIRED SPACE Drain hole 1 5 8 GE09 12 15NA NA2 15 3 4 Drain hole 1 5 16 GE09 12 15NAH NAH2 1 4 in or more when front 5 Air in and sides of the unit are clear 2 3 8 13 16 Oval hole 2 When any 2 sides of left right r 7 32 and rear of the unit are clear 29 32 11 1 4 handle Z Q amp N 2 lt Liquid pipe 1 4 flared E Gas pipe 3 8 flared GE09 12 n RE J 5 i 1 2 flared GE15 8 11 29 32 6 23 32 d 5 15 16 19 11 16 k 31 1 2 2 23 32 OBH549G 19 MUZ GE18NA Unit inch MUZ GE18NAH MUY GE18NA REQUIRED SPACE 1 20 in more when front and sides of the unit are clear 20 9 32 11 25 32
85. m 2 Use copper conductors on 208 230V 1 phase 602 Loewe CIRCUIT BREAKER BAN 3 pen VERTER P C CN641 BOARD CN124 llo o oj3 of 00901 4 Io o o o o O 1 1062 the indoor si for e electric wiring refer servicing MF y For field wiring 4 T64 RT68 t ts RT65 RT62 LEV 0 the indoor unit electric SYMBOL NAME SYMBOL NAME SYMBOL NAME CT CURRENT TRANSFORMER L62 CMC COIL RT68 OUTDOOR HEAT EXCHANGER 1 62 63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL THERMISTOR DB61 DB65 DIODE MODULE MC COMPRESSOR TB1 TB2 TERMINAL BLOCK DSA SURGE ABSORBER MF FAN MOTOR TR821 SWITCHING POWER TRANSISTOR FOOL F301 FUSE T3 15AL250V PTC64 PTC65 CIRCUIT PROTECTION 1801 TRANSFORMER HC930 IPM INTELLIGENT POWER MODULE RT62 DISCHARGE_TEMP THERMISTOR X64 RELAY 10800 INTELLIGENT POWER DEVICE RT64 FIN TEMP THERMISTOR L61 REACTOR RT65 AMBIENT TEMP THERMISTOR OBH549G 21 al M TOUR UNIT rog ee 52 Mle 852 1 p wir Gi J ERN 00 2309 1 phase 60Hz o mW
86. mal Yes Refer to 10 4 Disconnect CN932 from the inverter P C board and turn on the power supply Y Rotate the outdoor fan motor manually and measure the voltage of CN931 Between 1 and 5 Between 2 and 5 Between 3 and 5 Fixed to either 5 or 0 VDC Does the voltage between each terminal become 5 and 0 No N VDC repeatedly Yes Y lt No Does the outdoor fan motor rotate smoothly Yes Y Replace the outdoor fan motor OBH549G Y Replace the inverter P C board 55 J Check of power supply MUZ GE09 12 15NA NA2 NAH NAH2 MUZ GE18NA NAH MUY GE09 12 15NA NA2 MUY GE18NA x1 Intelligent power module MUZ GE09 12 15 18 24NA MUY GE09 12 15 18 24NA Power module Other models Disconnect the connector CN61 between compressor and intelligent power module OR and press Rectify indoor outdoor EMERGENCY OPERATION switch SERM Y Yes Does The upper lamp of Is there voltage 208 230 VAC Replace the indoor OPERATION INDICATOR lamp on No between the indoor terminal No electronic control P C the indoor unit light up block S1 and S2 board Tes Is there bus bar voltage 260 325 Does LED on the inverter P C P between DB61 and DB61 Replace the inverter on the inverter P C board Yes up or flash Refer No board Refer to 10 6 1 No Ve If LED
87. nal block S1 and S2 wees Press EMERGENCY OPERATION switch once Y Does the OPERATION INDICATOR lamp light up lt Confirmation of the power to the indoor unit gt No Yes Y Is serial signal error indicated 6 minutes later Yes ing wire lt y A y X3 Be sure to check this within 3 minutes after turning ON After 3 minutes LED blinks 6 times Even when the inverter P C board or the outdoor electronic control P C board is normal LED blinks 6 times after 3 minutes Is the bus bar voltage of the inverter P C board normal Refer to TEST POINT DIAGRAM AND VOLTAGE in this manual Yes Y the LED on the inverter P C board repeat 3 6 second OFF and 0 8 sec ond ON quick blinking 3 Yes Y Turn OFF the power supply Remove the bridge between outdoor terminal block S2 and S3 A Turn OFF inverter controlled lighting equipment Turn OFF the power supply and then turn ON again Press EMERGENCY OPERATION Switch Reinstall either the unit or the light away from each other Attach a filter on remote control receiv ing section Is serial signal error indicated 6 minutes later of the indoor unit OBH549G Y Replace the indoor elec tronic control P C board 59 Check of power supply Refer to 10 5 Replace the inverter P C board 2 Lighted or not lighted X2 Be careful of the resi
88. nductors only CONNECTING WIRES For field wiring 208 230V 1 phase 60Hz SYMBOL NAME SYMBOL NAME SYMBOL NAME C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL RT68 OUTDOOR HEAT EXCHANGER DB61 0865 DIODE MODULE COMPRESSOR TEMP THERMISTOR F701 F801 F901 FUSE T3 15AL250V MF FAN MOTOR TBI TB2 ERMINAL BLOCK H DEFROST HEATER PTC64 PTC65 CIRCUIT PROTECTION TR821 SWITCHING POWER TRANSISTOR IC802 POWER DEVICE RT61 DEFROST THERMISTOR T801 TRANSFORMER IPM C932 POWER MODULE RT62 DISCHARGE TEMP THERMISTOR X63 X64 X66 RELAY 161 REACTOR RT64 FIN TEMP THERMISTOR 2154 REVERSING VALVE COIL LED LED RT65 AMBIENT TEMP THERMISTOR 26 EATER PROTECTOR BK Ak gt BLK F 1 ji Bk DB65 ya 1 I INVERTER P C BOA 2 LOW D 10 16932 CIRCUIT LDU u P CNIL BREAK 9 o o o o Fem POHER SUPPLY IPM LED 208 230V 5 1 phase 3 1 CNG42 CN644 CN643 CN641 CN124 CN932 o o o 1 o o 1 o o o 3 1 o o oo o o o o o Off E p E m 5 Y r J 2 NOTES 58 Pz A F 4 d D paz 1 About the indoor side electric 3 T64 RT65 _RT6L RT62 Een z wiring refer to the indoor 208 230V 2 unit electric wiring diagram LEV Igor for servicing 2 Use copper conductors only For field wiring 3 Symbols indicate Terminal block SYMBOL NAME SYMBOL NAME SYMBOL NAME C62 C63 SMOOTHING CAPACITOR LEV EXPANSION VALVE COIL RT68 OUTDOOR HEAT EXCHANGER DB61 DB65 DIODE MODULE MC CO
89. oard y failure mode recall function Indoor unit recall function 11 time flash DC voltage 8 time flash DC voltage of inverter cannot be Refer to 10 5 How 2 5 seconds 2 5 seconds OFF detected normally to check inverter OFF Each phase current of 9 time flash Each phase current of compressor compressor compressor 2 5 seconds OFF cannot be detected normally 12 time flash Overcurrent Compressor 10 time flash Large current flows into intelligent compressor 2 5 seconds phase 2 5 seconds OFF power module IPM power module connector OFF IPM 1 Refer to 10 5 How The open phase operation of to check inverter compressor is detected compressor The interphase short circuit occurs in the output of the intelligent power module IPM power module IPM x1 The compressor winding shorts circuit Outdoor unit 14 time flash Stop valve Closed valve 14 time flash Closed valve is detected by compressor Check stop valve 2 5 seconds 2 5 seconds OFF current OFF 4 way valve 16 time flash The 4 way valve does not work Check the 4 way valve Pipe temperature 2 5 seconds OFF properly Replace the inverter The indoor coil thermistor detects an P C board abnormal temperature NOTE Blinking patterns of this mode differ from the ones of Troubleshooting check table 10 3 x1 Intelligent power module MUZ GE09 12 15 18 24NA MUY GE09 12 15 18 24NA Power module Other mod
90. power supply and press EMERGENCY OPERATION switch Does the unit operate for 10 minutes or more without showing thermistor abnormality P Replace The inverter P C board Yes OK Cause is poor contact MUZ GE09 12 15NA NA2 NAH NAH2 MUZ GE18NA NAH MUY GE09 12 15NA NA2 MUY GE18NA Thermistor Connector Pin No Defrost MUZ Between CN641 pin1 and pin2 Discharge temperature Between CN641 pin3 and pin4 Fin temperature Between CN642 pin1 and pin2 Inverter P C board Ambient temperature Between CN643 pin1 and pin2 Outdoor heat exchanger temperature Between CN644 pin1 and pin3 MUZ GE24NA MUY GE24NA Thermistor Connector Pin No Defrost MUZ Between CN671 pin1 and pin2 Discharge temperature Between CN671 pin3 and pin4 Fin temperature Between CN673 pin1 and pin2 Inverter P C board Ambient temperature Between CN672 pin1 and pin2 Outdoor heat exchanger temperature Between CN671 pin5 and pin6 H Check of R V coil MUZ GE09 12 15NA NA2 NAH NAH2 MUZ GE18NA NAH MUZ GE24NA First of all measure the resistance of R V coil to check if the coil is defective Refer to 10 4 x In case 721 MUZ GE09 12 15 18 CN602 MUZ GE24 is disconnected or coil is open voltage is generated between the terminal pins of the connector although no signal is being transmitted to coil Check if CN721 MUZ GE09 12 15 18 CN602 MUZ GE24 is connected
91. r unit Other abnormality Outdoor unit is defective Refer to 10 2 2 Flow chart of the de tailed outdoor unit failure mode recall function 16 time flash 2 5 seconds OFF 4 way valve Pipe temperature The 4 way valve does not work properly The indoor coil thermistor detects an abnormal temperature Refer to 10 5 Check of R V coil Replace the inverter P C board Outdoor unit stops and re starts 3 minutes later is 2 time flash 2 5 seconds OFF Overcurrent protec tion Large current flows into intelligent power module power module 1 When overcurrent protection occurs within 10 seconds after compressor starts compressor restarts after 15 seconds MUZ GE09 12 15 18 MUY GE09 12 15 18 Reconnect connector of compressor Refer to 10 5 How to check inverter compressor Check stop valve 3 time flash repeated 15 5 Seconds OFF Discharge tempera ture overheat protec tion Temperature of discharge temperature thermistor exceeds 241 F 116 C compressor stops Compressor can restart if discharge temperature thermistor reads 212 F 100 C or less 3 minutes later eCheck refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV 4 time flash 2 5 seconds OFF Fin temperature P C board temperature thermistor overheat protection Temperature of fin temperature thermistor on the heat sink ex ceeds 167 176 F 75 80
92. re F MUZ GE18NA MUZ GE18NAH MUY GE18NA SHF at rating condition 0 71 50 Airflow 498 CFM 1 9 71 67 1 8 63 SS F ure K we tenpera wake eM indoor Total power consumption kW gt 65 75 85 95 105 115 Outdoor intake air DB temperature F 30 Heating MUZ Heating capacity at Rated frequency 1 3 59 N 79 Ral 207 ex ox ee 221 a ae J NN 4 weep 27272 Je T correction factor 2 difference F N a gt a Indoor air Dry bulb temperature e 4 5 14 23 32 41 50 Outdoor intake air WB temperature F MUZ GEO9NA MUZ GE09NA2 Airflow 413 CFM 1 2 t 9 a 1 0 2 08 65 5 06 erature ndoor intake air DB temp g 94 550 10 20 30 2 L J Outdoor intake air WB temperature F MUZ GE12NA MUZ GE12NA2 Airflow 413 CFM 244 75 E i 2 12 8 1 0 EN 97 0 8 z ture CF n EC mpera 5 0 6 P indoor intake air peu P 0 4 UO 10 20 30 40 50 60 70 Outdoor intake air WB tempera
93. s the number of times the LED blinks after every 2 5 second OFF Flashing Inverter MUZ GE24NA Example When the flashing frequency is 2 a MUY GE24NA Pu 0 5 second ON n 0 5 second ON Sume MUZ GE09 12 15 2 5 second OFF LED NA NA2 NAH 2 Flashing gt MUY GE09 12 15 NA NA2 MUZ 18NA NAH MUY 18NA 10 4 TROUBLE CRITERION OF MAIN PARTS MUZ GEO9NA MUZ GE12NA MUZ GE15NA MUZ GE18NA MUZ GE24NA MUZ GEO9NA2 MUZ GE12NA2 MUZ GE15NA2 MUZ GEO9NAH MUZ GE12NAH MUZ GE15NAH MUZ GE18NAH MUZ GEO9NAH2 MUZ GE12NAH2 MUZ GE15NAH2 MUY GEO9NA MUY GE12NA MUY GE15NA MUY GE18NA MUY GE24NA MUY GEO9NA2 MUY GE12NA2 MUY GE15NA2 Part name Check method and criterion Defrost thermistor RT61 MUZ Fin temperature thermistor RT64 Measure the resistance with a tester Ambient temperature thermistor RT65 Refer to 10 6 Test point diagram and voltage 1 Inverter P C board for the chart of thermistor Outdoor heat exchanger temperature thermistor RT68 Measure the resistance with a tester Before measurement hold the Discharge temperature thermistor with your hands to warm it up thermistor R162 Refer to 10 6 Test point diagram and voltage 1 Inverter P C board for the chart of thermistor Measure the resistance between terminals using a tester Temperature 4 104 F 20 40 C WHT RED BLK Normal Q GE09 GE12 GE15 18 GE24 1 36 1 93 1
94. screen shown in the right figure are all displayed Then release the buttons D MITSUBISHI ELECTRIC Press OPERATE STOP ON OFF button of the remote 15 controller the set temperature is displayed with the remote controller headed towards the indoor unit 1 Y x1 Regardless of normal or abnormal condition a short beep Expansion valve operates in full opening direction is emitted once the signal is received Y Do you hear the expansion valve click li k Sd aa diia 2 Do Yes Do you feel the expansion valve vibrate on touching it To Is LEV coil properly fixed to NO Properly fix the LEV coil to the expansion valve the expansion valve pins of CN724 on the inverter P C board 1 Pin Pin Does the resistance of LEV 2 Pin Pin have the characteristics vas 3 Pin Pin the inverter Yes Measure each voltage between connector Refer to 10 4 4 Pin Pin No Is there about 3 5 VAC between each NOTE Measure the voltage by an analog tester Replace the LEV coil Yes Replace the expansion valve NOTE After check of LEV do the undermentioned operations 1 Turn OFF the power supply and turn ON it again 2 Press RESET button on the remote controller OBH549G e D Check of inverter P C board Check the outdoor fan motor Refer to 1
95. terminal block Screw of the heat sink support and the back panel 2 Disconnect the lead wire to the reactor and the following connectors lt Inverter P C board gt CN641 Defrost thermistor MUZ and discharge tempera ture thermistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor CN721 R V coil MUZ CN724 LEV CN931 CN932 Fan motor 3 Remove the compressor connector CN61 4 Remove the screws fixing the heat sink support and the separator 5 Remove the fixing screws of the terminal block support and the back panel 6 Remove the inverter assembly 7 Remove the screw of the ground wire and screw of the ter minal block support Photo 5 Inverter assembly 8 Remove the heat sink support from the P C board support 9 Remove the screw of the inverter P C board and remove the inverter P C board from the P C board support support and the separator 111111 Heat sink Inverter P C board Screw of the rire ee terminal block ook of the suppor board P C board j support Terminal block support Screw of the Heat sink support ground wire Hook of the P C Screw of the P C board support board fixture 3 Removing R V coil MUZ Photo 6 R V coil MUZ 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connectors Inverter P C board CN721 R V coil 3 Remove the R V coil Discharge temperature th
96. tor RT61 MUZ Capillary tube 0 118 x I D 0 071 x 23 5 8 li Capillary tube 23 0 x 21 8 x 600 x2 Us Strainer Flared connection O D 0 118 x I D 0 079 100 x 9 7 16 LEV 03 0 x 22 0 x 240 PS R V coil MUZ n heating ON p gt lt 000 gt lt cooling OFF Stop valve th sirai Refrigerant pipe 1 4 de EL with heat insulator OBH549G d Refrigerant flow in cooling gt Refrigerant flow in heating MUZ MUZ GE18NA Unit inch MUZ GE18NAH MUY GE18NA Refrigerant pipe 01 2 with heat insulator Muffler 4 way valve 100 all Q Stop valve with service port Flared connection Discharge heat i temperature Defrost exchanger II thermistor thermistor thermistor lt ORT62 RT61 RT65 Service port Outdoor heat exchanger temperature I thermistor RT68 Flared connection P Receiver R V coil MUZ I heating ON cw Stop valve Capillary tube cooling OFF with strainar O D 0 142 x I D 0 094 Refrigerant pipe 1 4 x 1 31 32 gt Refrigerant flow in cooling with heat insulator 23 6 2 4 50 gt Refrigerant flow in heating MUZ MUZ GE24NA MUY GE24NA Refrigerant pipe 25 8 pid with heat insulator 4 way valve Service 7 gt Stop valve with service p Flared connection Discharge Ambient temperature exchanger temperature ice thermistor Defrost thermistor t thermistor RT65 pen RT61 MUZ Outdoor
97. tor and the following connectors lt Inverter P C board gt CN671 Defrost thermistor MUZ discharge temperature thermistor and outdoor heart exchanger tempera ture thermistor CN672 Ambient temperature thermistor 3 Pull out the discharge temperature thermistor from its holder 4 Pull out the defrost thermistor from its holder 5 Pull out the outdoor heat exchanger temperature thermistor from its holder 6 Pull out the ambient temperature thermistor from its holder Removing outdoor fan motor 1 Remove the top panel cabinet and service panel Refer to 1 2 Disconnect the following connectors Inverter P C board CN931 and CN932 Fan motor 3 Remove the propeller 4 Remove the screws fixing the fan motor 5 Remove the fan motor Removing the compressor and 4 way valve 1 Remove the top panel cabinet and service panel Refer to 1 2 Remove the back panel Refer to 1 3 Remove the inverter assembly Refer to 2 4 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG 5 Detach the brazed part of the suction and the discharge pipes connected with compressor 6 Remove the compressor nuts 7 Remove the compressor 8 Detach the brazed parts of 4 way valve and pipes Photo 5 OBH549G ie Photo 6 Outdoor heat Ambient tem exchanger tempera perature ture thermistor thermistor nmn 1 Screws of the outdoor fan motor
98. ture F MUZ GE15NA MUZ GE15NA2 Airflow 463 20 75 70 17 65 52 8 1 4 8g 944 z e P 5 mperalun 8 0 8 indoor intake air DB te 0 5 0 10 20 30 40 50 60 70 Outdoor intake air WB temperature F 59 MUZ GEO9NAH MUZ GE09NAH2 Airflow 413 CFM erature CF Y empi indoor intake air DB u Total power consumption kW 0 10 20 30 40 50 60 70 Outdoor intake air WB temperature F MUZ GE12NAH MUZ GE12NAH2 Airflow 413 CFM Wo 2 210 85 0 8 ture CF DB temper s 0 6 Indoor intake air D 710 10 20 30 15 L Outdoor intake air WB temperature F MUZ GE15NAH MUZ GE15NAH2 Airflow 463 CFM temperature en take air DB Indoor in Total power consumption kW 050 10 20 30 40 50 60 70 Outdoor intake air WB temperature F This value of frequency is not the same as the actual frequency in operating Refer to 7 5 and 7 6 for the relationships between frequency and capacity OBH549G 31 MUZ GE18NA MUZ GE18NAH Airflow 512 CFM bis Airflow 512 CFM 2 0 1 8 1 6 1 4 1 2 ture ir DB tempere indoor intake air D 0 8 0 10 20 30 40 50 60 70 a8 0 10 20 30 40 50 60 70 Outdoor intake air WB temperature F Outdoor intake air
99. upply V Phase Hz 208 230 1 60 Input 0 022 0 023 0 022 0 023 Fan motor current 0 24 0 22 0 25 0 23 0 24 0 22 0 25 0 23 Outdoor unit MUZ GE09NA MUZ GE09NA2 MUZ GE09NAH MUZ GE09NAH2 MUY GE09NA MUY GE09NA2 MUZ GE09NA MUZ GE09NA2 MUZ GE09NAH MUZ GE09NAH2 MUZ GE12NA MUZ GE12NA2 MUZ GE12NAH MUZ GE12NAH2 MUY GE12NA MUY GE12NA2 MUZ GE12NA MUZ GE12NA2 MUZ GE12NAH MUZ GE12NAH2 Power supply V phase Hz 208 230 1 60 Input 0 638 0 737 0 938 1 147 Comp current 3 32 3 00 3 66 3 31 4 39 3 97 5 41 4 89 Fan motor current 0 27 0 24 0 30 0 27 0 34 0 31 0 31 0 28 Refrigerant circuit Condensing pressure 389 331 389 397 Suction pressure 151 103 133 104 Discharge temperature 154 152 163 162 Condensing temperature 115 103 115 116 Suction temperature 59 39 56 35 Comp shell bottom temp 151 149 158 158 Ref pipe length Refrigerant charge R410A Indoor unit Intake air temperature 80 80 67 67 Discharge air temperature 60 56 58 55 Fan speed High 1 020 1 020 Airflow High 367 Wet 367 Wet Outdoor unit Intake air temperature 95 95 Fan speed Airflow OBH549G 37 MSZ GE15NA MSY GE15NA MSZ

MUY MUZ-GE Service Manual

Contents

Download Pdf Manuals

Related Search

Related Contents