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Mitsubishi Electronics MUZ-GB50VA Network Router User Manual

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2. Discharge temperature thermistor RT62 200 100 700 180 50 600 160 g 500 ki x 8 120 8 70 400 j 100 5 60 5 2 15 300 agwo 50 9 2 60 a 2 z dn 40 100 2 20 30 0 20 0 0 10 20 30 40 50 60 70 80 90 100 110 120 oO 6 10 Temperature C pe Temperature C d 8 vo w 0 2 py 2200 2109 20 40 0 10 20 30 40 3 Z gt s gt lt occ z S524 Temperature 29 2 50 03 93500 O lt 20 35 0822 OS H aot a oa 2s 288942 28 OF s ss 5 m o 3 3 3 Do 2 2 N 9 d
3. 80 i LE i i OUTDOOR UNIT ds T sx E a m 70 L 1 1 1 F NC 70 id 4 MICROPHONE Amr UNE B ul E X E ee a F i W 50 r i E 1 t TNC 50 a F 3 40 N TNG 40 a 3 E i F z 3 x 30 X T F a n i m i ME 1 APPROXIMATE 20 THRESHOLD OF t HEARING FOR F t TNG20 GONTINUOUS F F i NOISE I 10 r m i 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz 5 OUTLINES AND DIMENSIONS MUZ GB50VA Unit mm OUTDOOR UNIT REQUIRED SPACE Open as a rule 500mm or more if the front and both sides are open 100mm or more 200mm or more if there are obstacles to both sides Open as a rule 500mm or more if the back both sides and top are open 350mm or more Service panel Vf 7 AS Liquid refrigerant WA pipe joint Refrigerant pipe Y are 7 flared 46 35 A L Ge refrigerant pipe joint Refrigerant pipe 198 flared 12 7 WIRING DIAGRAM MUZ GB50VA 1ol99uuoo IT yoojq euluu ayeolpul sioqu S e Guuim pey 104 siojonpuoo 1eddoo esp z Burorwes 10 JOOPU eui 0 18491 epis JOOPU eui 1
4. o E 874 14 14 x o 8 80 313 13 ile 734 12 26 1 2 8 5 8 26 24 22 5 667 91 1 t 24 1 1 20 zt 2 1 door C 5 594 1 0 T intake 225 1 0 rature a air Wer temp 5 23 hi ai bulb tem 20 0 9 Wet bv 8 erature 18 7 indoor inta L ap 27 30 35 40 43 27 30 35 40 43 lt lt Outdoor intake air Dry bulb temperature Outdoor intake air Dry bulb temperature oo om 99 235 Heating capacit Total input heati 241 9 capacity 2 otal input heating 22 3 1 2 A 26 20 4 e 18 5 1 0 moon 16 7 14 8 1 1 34 OFF 2 0 9 EET be 0 8 409 24241 4 difference Input correction factors Capacity correction factors 0 7 272 11 1 0 6 z Indoor air Dry bulb temperature 10 5 0 5 10 15 10 5 0 5 10 15 Outdoor intake air Wet bulb temperature Outdoor intake air Wet bulb temperature NOTE The above broken lines are for the heating operation without any frost and defrost operation MSZ GB50VA MUZ GB50VA Rated frequency 82Hz 8 2 Capacity and input correction by operational frequency of compressor MUZ GB50VA is Correction of Cooling
5. 230V AC Input CN912 R V coil 230V AC 230V AC Output k gt 24 NR64 VARISTOR F64 FUSE F911 FUSE 2A 250V 1A 250V 32 3 Outdoor power board MUZ GB50VA SPPS 2555 O f 9659 Zo no Connect to the compressor Voltage among phases 5V to 180V 325 370V DC Output Red Connect to the earth CN2 Connect to the controller board 1 5 Signal transmission To electronic control P C board 5V DC pulse wave 2 5 Zero cross signal 3 4 Not used 6 5 15V 7 5 2 15V CN3 Fin temperature thermistor RT64 Signal reception From electronic control P C board 5V DC pulse wave 0000000909009 a 060000000090 e 9 096007 P a CN3 105 106 CN5 Primary current detection Connect to the noise filter 8 GLONOOWQ 55 E 2 sasn i sss Q Connect to the compressor OO GO 68 OS Voltage among phases 5V to 180V Connect to the earth 325 370V DC 25 Output VU fefe ef eu CN2 Connect to the controller board 1 5 Signal transmission To electronic control P C board 5V DC pulse wave 2 5 Zero cross signal 3 4 Not used 6 5 15V 7 5 2 15V CN3 Fin temperature thermistor RT64
6. MUZ GASOVA m gt MUZ GB50VA m 1 Refrigerant filling capacity has been changed 2 Outdoor electronic control P C board has been changed 2 PART NAMES AND FUNCTIONS MUZ GB50VA ACCESSORIES C Airinlet back and side C Piping MUZ GB50VA Drain hose Drain socket Drain cap 33 Outdoor model MUZ GB50VA Function Cooling Heating Single phase 230V 50Hz Capacity Rated frequency Min Max 5 0 0 9 5 8 5 8 0 9 7 8 Dehumidification 2 5 Air flow 321 High Low 2 940 1 650 2 940 2 210 Power outlet Running current 31 7 23 7 43 Power input 1 1 610 1 660 Power factor 1 Starting current 1 Compressor motor current 1 Fan motor current 1 efficient of performance C O 3 03 3 41 Model SNB130FLDH or SNB130FLDH1 Output 850 Winding U V 0 45 W U 0 45 resistance at 20 C V W 0 45 Model RC0J60 AA BLK WHT 15 2 WHT RED 15 2 RED BLK 15 2 Dimensions WxHxD 840 850 330 Weight 53 Sound level 1 High Low 52 51 55 53 Fan speed High Low 800 480 800 620 Fan speed regulator Refrigerant filling capacity R410A Refrigeration oil Model NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb temperature 27 C Wet bulb temperature 19 C Outdoor Dry bulb temperature 35 C Wet bulb temperature 24 C Heating Indoor Dry bulb temperature 20 C Wet bulb temperature 15 C Outdoor Dry bulb temperature 7
7. Yes Judgment of indoor outdoor abnormality Blinks Before blinking does the left lamp of OPERATION INDICATOR lamp stay ON for 3 Yes seconds Stays ON for 3 seconds without beep The outdoor unit is abnormal w The indoor unit is abnormal The outdoor unit is abnormal Check the blinking pattern and confirm the abnormal point with the indoor unit Check the blinking pattern and confirm the abnormal point with the failure mode table Refer to indoor unit service manual outdoor unit failure mode table Refer to 10 2 3 Make sure to check at least two consecutive blinking cycles 2 Make sure to check at least two consecutive blinking cycles 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 Press RESET button of the remote controller Repair the defective parts Deleting the abnormal memorized condition QAfter repairing the unit recall the failure mode again according to Setting up the failure mode recall function mentioned above 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
8. ME 5 2255 9 WZE6Y i 9 1 ji gems us QUEE SCOPI OUO S6 NO elz 11 N 199NO 99NO c i 9 08 94 2 LOZNO 18 NO Od Sle i 20 1 e s t e e t oINO315313 IHM BN 8 ONLLOSNNOO T w LINN K RA RARUS To To sooon l a 101 9m Ta Aa zie 2 2 3 NO 2 uo L 219 g e DIIS 99798099 zg v T LO6NO m 19 0 SION gt gt xg S abou 3 9 oo w uaxv3ud J ZHOS A0 G N AlddNS H3MOd 7 REFRIGERANT SYSTEM DIAGRAM MUZ GB50VA Unit mm OUTDOOR UNIT Muffler Refrigerant pipe 412 7 with heat insulator Flared connection Stop valve 2 with service p Outdoor eat Ambient exchanger temperature thermistor RT65 Defrost thermistor RT61 Compressor Outdoor heat exchanger temperature thermistor RT68 LEV R V coil OFF gt Refrigerant flow in cooling Refrigerant flow in heating Strainer 100 _ Strainer Receiver 100 Stop valve Capillary tube 3 6 2 4 50 Refrigerant pipe 96 35 with heat insulator MAX REFRIGERANT PIPING LENGTH and MAX HEIGHT DIFFERENCE Refrigerant piping m Model Max length Max Hei
9. doo AU 612 HOLSINH3HI 3H01VH3dW31 JOUVHOSIC Avia3yi v9X YOLSINYAHL 1LSOHJ3G YOLSISSY JAYA NOISNVdX3 A31 YOLOVaY 11 YOLSISSY 39018 TVNINYIL cal 39018 TVNINYUIJIL daWHOdSNVHl 1081 HOLSIS3H H3 TIOHLNOO HOLOVJ H3MOd YOLSIYVA Ygl 3SION 3106 19955 YOLSIWYAHL AYNLVYAdWAL 8914 YJ NYVYH9X4 LVAH YOOULNO FINGOW H3MOd LNSDITISLNI Ndl FINGOW H3MOd LNADITISLNI 056 nosz LL 5 116 092 779181 3505 1084 62 1 1 35 4 v94 YGINYOJSNVYL INFYYNID YOLOW YOOULNO YOLSINGJFHL JYN LVYJINIJL SILA YAWHOASNVYL INFYUNOD 2712 YOLSINGJHL JAN 1vH3dWal 7914 uosSaudWoo SALON TOBWAS YOLIOVdVO ONIHLOONS 195 TONAS Ndl OUTDOOR UNIT L AN a al i 7j ZeE6NI g AA 8914 2OlHI91H
10. __ 10 3 Instruction of troubleshooting Indoor unit operates Outdoor unit doesn t operate Indoor unit Indoor unit operates Outdoor unit doesn t operate normally doesn t receive the signal from remote controller OPERATION INDICATOR lamp on the indoor unit is flashing on and off Outdoor unit operates only in Test Run operation Refer to 8 3 Outdoor unit Unit doesnt Indoor unit Indoor unit doesn t operate operates when doesn t operate operate normal EMERGENCY when evenun operation OPERATION EMERGENCY COOL or switch is pressed OPERATION Refer to 8 3 HEAT mode switch is pressed switch is pressed If blinking of OPERATION INDICATOR lamp cannot be checked it can be checked with failure mode recall function Test Run operation means the operation within 30 minutes after EMERGENCY OPERATION Check room Refer to 10 6 Refer to 10 6 0 Refer to 1 Check indoor outdoor temperature How to check Check of Check of check i he pow Gf thermistor inverter RV coil remote controller is supplied to the Refer to compressor and receiver indoor unit Test point P C board 2 Refer to diagram and Check of indoor Zu voltage erste control 227 Refer to indoor unit C board
11. Signal reception From electronic control P C board 5V DC pulse wave CN5 Primary current detection Connect to the noise filter 33 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 Sleeve Slide the sleeve Pull the terminal while 2 The terminal with this connector has the locking mechanism Hold the sleeve and pull out the terminal Locking lever pushing the locking slowly lever Connector MUZ GB50VA OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1 Removing the cabinet Photo 1 1 Remove the screws of the service panel Screw 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 top panel 6 Remove the valve cover 7 Remove the screws of the cabinet 5 8 Remove the cabinet 9 Remove the screws of the back panel p 10 Remove the back panel cabinet Photo 3 Screws of the cabinet Photo 2 Senne A eee Screw of the service panel tt Screws of the top die pane
12. 0 43 1568 22 22 6 38 1 98 0 31 1436 6 15 1 91 0 31 1526 6 00 1 86 0 31 1568 5 75 1 78 0 31 1634 23 18 5 88 3 47 0 59 1320 5 63 3 32 0 59 1386 5 40 3 19 0 59 1452 5 20 3 07 0 59 1518 23 20 6 13 2 88 0 47 1386 5 88 2 76 0 47 1469 5 70 2 68 0 47 1502 5 50 2 59 0 47 1568 23 22 6 38 2 23 0 35 1436 6 15 2 15 0 35 1526 6 00 2 10 0 35 1568 5 75 2 01 0 35 1634 24 18 5 88 3 70 0 63 1320 5 63 3 54 0 63 1386 5 40 3 40 0 63 1452 5 20 3 28 0 63 1518 24 20 6 13 3 12 0 51 1386 5 88 3 00 0 51 1469 5 70 2 91 0 51 1502 5 50 2 81 0 51 1568 24 22 6 38 2 49 0 39 1436 6 15 2 40 0 39 1526 6 00 2 34 0 39 1568 5 75 2 24 0 39 1634 24 24 670 1 81 0 27 1502 6 45 1 74 0 27 1584 6 30 1 70 0 27 1634 6 10 1 65 0 27 1716 25 18 5 88 3 94 0 67 1320 5 63 3 77 0 67 1386 5 40 3 62 0 67 1452 5 20 3 48 0 67 1518 25 20 6 13 3 37 0 55 1386 5 88 3 23 0 55 1469 5 70 3 14 0 55 1502 5 50 3 03 0 55 1568 25 22 6 38 2 74 0 43 1436 6 15 2 64 0 43 1526 6 00 2 58 0 43 1568 5 75 2 47 0 43 1634 25 24 6 70 2 08 0 31 1502 6 45 2 00 0 31 1584 6 30 1 95 0 31 1634 6 10 1 89 0 31 1716 26 18 5 88 4 17 0 71 1320 5 63 3 99 0 71 1386 5 40 3 83 0 71
13. 0 91 1518 31 20 6 13 4 84 0 79 1386 5 88 4 64 0 79 1469 5 70 4 50 0 79 1502 5 50 4 35 0 79 1568 31 22 6 38 4 27 0 67 1436 6 15 4 12 0 67 1526 6 00 4 02 0 67 1568 5 75 3 85 0 67 1634 31 24 6 70 3 69 0 55 1502 6 45 3 55 0 55 1584 6 30 3 47 0 55 1634 6 10 3 36 0 55 1716 31 26 6 90 2 97 0 43 1584 6 70 2 88 0 43 1667 6 60 2 84 0 43 1716 6 40 2 75 0 43 1766 32 18 5 88 5 58 0 95 1320 5 63 5 34 0 95 1386 5 40 5 13 0 95 1452 5 20 4 94 0 95 1518 32 20 6 13 5 08 0 83 1386 5 88 4 88 0 83 1469 5 70 4 73 0 83 1502 5 50 4 57 0 83 1568 32 22 6 38 4 53 0 71 1436 6 15 4 37 0 71 1526 6 00 4 26 0 71 1568 5 75 4 08 0 71 1634 32 24 6 70 3 95 0 59 1502 6 45 3 81 0 59 1584 6 30 3 72 0 59 1634 6 10 3 60 0 59 1716 32 26 6 90 3 24 0 47 1584 6 70 3 15 0 47 1667 6 60 3 10 0 47 1716 6 40 3 01 0 47 1766 NOTE Q Total capacity kW SHF Sensible heat factor DB Dry bulb temperature SHC Sensible heat capacity KW INPUT Total power input W WB Wet bulb temperature 12 i PERFORMANCE DATA COOL operation Rated frequency 79Hz MSZ GB50VA MUZ GB50VA CAPACITY 5 0 KW SHF 0 69 INPUT 1650 W OUTDOOR DB C INDOOR INDOOR 35 40 43 DB C
14. 1584 6 30 2 71 0 43 1634 6 10 2 62 0 43 1716 28 26 _ 6 90 2 14 0 31 1584 6 70 2 08 0 31 1667 6 60 2 05 0 31 1716 6 40 1 98 0 31 1766 29 18 5 88 4 88 0 83 1320 5 63 4 67 0 83 1386 5 40 4 48 0 83 1452 5 20 4 32 0 83 1518 29 20 6 13 4 35 0 71 1386 5 88 4 17 0 71 1469 5 70 4 05 0 71 1502 5 50 3 91 0 71 1568 29 22 6 38 3 76 0 59 1436 6 15 3 63 0 59 1526 6 00 3 54 0 59 1568 5 75 3 39 0 59 1634 29 24 6 70 3 15 0 47 1502 6 45 3 03 0 47 1584 6 30 2 96 0 47 1634 6 10 2 87 0 47 1716 29 26 6 90 2 42 0 35 1584 6 70 2 35 0 35 1667 6 60 2 31 0 35 1716 6 40 2 24 0 35 1766 30 18 5 88 5 11 0 87 1320 5 63 4 89 0 87 1386 5 40 4 70 0 87 1452 5 20 4 52 0 87 1518 30 20 6 13 4 59 0 75 1386 5 88 4 41 0 75 1469 5 70 4 28 0 75 1502 5 50 4 13 0 75 1568 30 22 6 38 4 02 0 63 1436 6 15 3 87 0 63 1526 6 00 3 78 0 63 1568 5 75 3 62 0 63 1634 30 24 6 70 3 42 0 51 1502 6 45 3 29 0 51 1584 6 30 3 21 0 51 1634 6 10 3 11 0 51 1716 30 26 6 90 2 69 0 39 1584 6 70 2 61 0 39 1667 6 60 2 57 0 39 1716 6 40 2 50 0 39 1766 31 18 5 88 5 35 0 91 1320 5 63 5 12 0 91 1386 5 40 4 91 0 91 1452 5 20 4 73
15. LED display display OFF Check of power supply Replace the outdoor DC fan motor Check the connecting of parts of main power supply circuit Turn on power supply Is there voltage of 230V AC in the No power supply terminal block Check the power supply cable Tres Replace the noise Is fuse F64 blown NO PS board Is the output voltage from the noise Yes filter P C board 230V AC Replace the fuse Replace the reactor Is the input voltage to the power board 230V AC Is the input voltage to the outdoor electronic control P C board 325V DC Replace the power board Yes Replace the outdoor electronic control P C board 27 Outdoor unit does not operate at all or stops immediately due to overcurrent Check of current limiting resistor When the current limiting resistor is open the rush current limiting relay X64 may not work properly Is the resistance of current limiting Not Turn ON the power Does LED on the outdoor resistor R64A or R64B on the open supply and press L y electronic control P C board No noise filter P C board normal EMERGENCY light up Normal resistance 100 5 OPERATION switch gue es Open Replace the power P C board Does the rush current Yes limiting relay X64 work properly No Replace the noise filter P C board Check other electric parts in the main
16. RoHS compliant MUZ GB50VA 12 2 ACCESSORY Symbol Q ty unit Part Name in Wiring Part No MUZ GB50 Remarks VA Diagram Et E12 817 704 DRAIN SOCKET 1 E12 444 705 DRAIN CAP 2 33 a MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Aug 2006 No OB455 REVISED EDITION A 6 Distributed in Mar 2006 No OB455 6 New publication effective Aug 2006 Made in Japan Specifications subject to change without notice
17. control P C board 370V or more Replace the power board Yes Turn off power supply of indoor and outdoor unit and measure the compressor winding resistance between the compressor terminals Is the resistance between each terminal normal yes Reconnect the lead wire of compressor and turn on power supply to indoor and outdoor unit 3 minutes later starts EMERGENCY OPERATION Replace the compressor Clarify the causes by counting time until the inverter stops 0 to 10 seconds compressor rare short 10 to 60 seconds compressor lock 60 seconds to 5minutes refrigerant circuit defective 5 minutes or more normal 24 22 When OPERATION INDICATOR lamp flashes 6 time When thermistor is abnormal Check of outdoor thermistors Disconnect the connector in the outdoor electronic control P C board or the outdoor power board No see below table and measure the resistance of thermistor Is the thermistor normal Yes Reconnect the connector CN661 CN663 and CN3 3 minutes after turning on the power supply start EMERGENCY OPERATION Yes Replace the outdoor electronic control P C board Does the unit operate 10 minutes or more without Thermistor Connector Pin No showing thermistor abnormality Defrost Between CN661 pint and pin2 Discharge temperature Between CN661 pin3 and pin4 Outdoor heat exchanger temperature Between CN661 and pin8
18. 4 90 3 48 0 71 1617 4 50 3 20 0 71 1716 4 30 3 05 0 71 1749 26 20 5 15 3 04 0 59 1683 4 80 2 83 0 59 1766 4 60 2 71 0 59 1815 26 22 5 45 2 56 0 47 1749 5 10 2 40 0 47 1848 4 90 2 30 0 47 1881 26 24 5 75 2 01 0 35 1815 5 40 1 89 0 35 1898 5 25 1 21 0 23 1947 26 26 _ 6 05 1 39 0 23 1881 5 70 1 31 0 23 1964 5 50 1 27 0 23 2013 27 18 4 90 3 68 0 75 1617 4 50 3 38 0 75 1716 4 30 3 23 0 75 1749 27 20 5 15 3 24 0 63 1683 4 80 3 02 0 63 1766 4 60 2 90 0 63 1815 27 22 5 45 2 78 0 51 1749 5 10 2 60 0 51 1848 4 90 2 50 0 51 1881 27 24 5 75 2 24 0 39 1815 5 40 2 11 0 39 1898 5 25 1 10 0 21 1947 27 26 6 05 1 63 0 27 1881 5 70 1 54 0 27 1964 5 50 1 49 0 27 2013 28 18 4 90 3 87 0 79 1617 4 50 3 56 0 79 1716 4 30 3 40 0 79 1749 28 20 5 15 3 45 0 67 1683 4 80 3 22 0 67 1766 4 60 3 08 0 67 1815 28 22 5 45 3 00 0 55 1749 5 10 2 81 0 55 1848 4 90 2 70 0 55 1881 28 24 5 75 2 47 0 43 1815 5 40 2 32 0 43 1898 5 25 1 00 0 19 1947 28 26 _ 6 05 1 88 0 31 1881 5 70 1 77 0 31 1964 5 50 1 71 0 31 2013 29 18 4 90 4 07 0 83 1617 4 50 3 74 0 83 1716 4 30 3 57 0 83 1749 29 20 5 15 3 66 0 71 1683 4 80 3 41 0 71 1766 4 60 3 27 0 7
19. 5200418 Ambient temperature Between CN663 pin1 and pin2 Fin temperature Between 1 and 2 Outdoor power board Replace the thermistor 25 The cooling operation or heating operation does not operate LED display Both LED1 and LED lighting Check of R V coil When heating operation does not work 1 Disconnect the lead wire leading to the compressor 2 3 minutes after turning on the power supply start EMERGENCY OPERATION in HEAT mode t Is there voltage of 230V AC between pin1 and 1 Turn off power supply of indoor and outdoor unit and pin 2 at connector CN912 disconnect the connector CN781 in the outdoor electronic control P C board 2 3 minutes after turning on the power supply start Turn off power supply of indoor and outdoor unit EMERGENCY OPERATION in HEAT mode Disconnect the connector Is there voltage 12V DC CN912 in noise filter P C No a between the connector CN781 board Is there normal te UV coll qs control P C board pin 5 and pin 3 resistance to R V coil No Replace the electronic Yes ves Replace the noise filter P C board Replace the 4 way valve When cooling operation does not work 1 Disconnect the lead wire leading to the compressor If the connector CN912 is 2 3 minutes after turning on the power supply start EMERGENCY not connected or R
20. OPERATION INDICATOR lamp light up Confirmation of the power to the indoor unit No Yes Is there any mis wiring poor contact or wire disconnection of the indoor outdoor connecting wire Y ON No Is serial signal error indicated 6 minutes later Make them correct Yes No Y A Turn OFF the power supply Check once more if the indoor outdoor connecting wire is not mis wiring Short circuit outdoor terminal block 52 and 1 Mis wiring may damage indoor electronic control Y 53 board during the operation Be sure to confirm the wiring is correct before the operation starts X3 Be sure to check this within minutes after turning ON After 3 minutes LED blinks 6 times Even when Turn ON the power supply the outdoor electronic control P C board is normal LED blinks 6 times after 3 minutes Does the LED on the outdoor electronic No Replace the outdoor electronic control board repeat 3 6 second OFF gt control board X2 Outdoor elect
21. V coil OPERATION in COOL mode is open voltage occurs between terminals even when the control is OFF Is there voltage of 230V AC between pin1 and pin 2 at connector CN912 Replace the 4 way valve Yes 1 Turn off power supply of indoor and outdoor unit and disconnect the connector 781 in the outdoor electronic control P C board 2 3 minutes after turning on the power supply start EMERGENCY OPERATION in COOL mode Is there voltage 12V DC between the connector CN781 pin 5 and pin 3 Replace the noise filter P C board Replace the outdoor electronic control P C board 26 22 Fan motor does not operate or stops operating shortly after starting the operation Check of outdoor fan motor Check the connection between the connector CN931 and 932 Is the resistance between each terminal Yes of outdoor fan motor normal No Disconnect CN932 from outdoor electronic control P C board and turn on the power supply Rotate the outdoor fan motor manually and measure the voltage of CN931 Between O and Between Q and G Between and G Fixed to either 5V or 0V DC No Does the voltage between each terminal become 5V DC and OV DC repeatedly No y Yes Does the outdoor fan motor rotates smoothly y Yes Replace the outdoor electronic control P C board Outdoor unit does not operate
22. WB C SHC SHF INPUT Q SHC sHF INPUT sHC SHF INPUT 21 18 4 90 2 50 0 51 1617 4 50 2 30 0 51 1716 4 30 2 19 0 51 1749 21 20 5 15 2 01 0 39 1683 4 80 1 87 0 39 1766 4 60 1 79 0 39 1815 22 18 4 90 2 70 0 55 1617 4 50 2 48 0 55 1716 4 30 2 37 0 55 1749 22 20 5 15 2 21 0 43 1683 4 80 2 06 0 43 1766 4 60 1 98 0 43 1815 22 22 5 45 1 69 0 31 1749 5 10 1 58 0 31 1848 4 90 1 52 0 31 1881 23 18 4 90 2 89 0 59 1617 4 50 2 66 0 59 1716 4 30 2 54 0 59 1749 23 20 5 15 2 42 0 47 1683 4 80 2 26 0 47 1766 4 60 2 16 0 47 1815 23 22 5 45 1 91 0 35 1749 5 10 1 79 0 35 1848 4 90 1 72 0 35 1881 24 18 4 90 3 09 0 63 1617 4 50 2 84 0 63 1716 4 30 2 71 0 63 1749 24 20 5 15 2 63 0 51 1683 4 80 2 45 0 51 1766 4 60 2 35 0 51 1815 24 22 5 45 2 13 0 39 1749 5 10 1 99 0 39 1848 4 90 1 91 0 39 1881 24 24 5 75 1 55 0 27 1815 5 40 1 46 0 27 1898 5 25 1 42 0 27 1947 25 18 4 90 3 28 0 67 1617 4 50 3 02 0 67 1716 4 30 2 88 0 67 1749 25 20 5 15 2 83 0 55 1683 4 80 2 64 0 55 1766 4 60 2 53 0 55 1815 25 22 5 45 2 34 0 43 1749 5 10 2 19 0 43 1848 4 90 2 11 0 43 1881 25 24 5 75 1 78 0 31 1815 5 40 1 67 0 31 1898 5 25 1 31 0 25 1947 26 18
23. a oF vo O sgo 56 mso 55 aj 6 88 25 555 583 Sam lt 8 So S S 9o AZ 200 DO zg lt W 22 28 9 5 65 DA DI lt DD gt 299 5 9 gt 2 oda d aa 829 RENS o 9 oz 2H 8 9 a Beam lt 6 II I t gd 2s Enpo T apee ia elds O E 1 JAL fr 2 LED 1 LED 2 PC622 Pce2t 2 CN801 325V DC 12 370V DC 5 Input A Pcett F801 FUSE L 3 15A 250V ras CN601 Pceo2 e is C serial signal eceot nput Room A 5 10V DC i PCBO30 2080 ANY oAAA 5 0 RETA RETC o o TRE Reo2 Gi SLiLlifesinessnescneeo 8 8 ooooooooo a odho ON CEEB z 9 o b 9 pen g 5 8 3 000000000 5 6501 ki L 3 lt DATSI DA782 H 4 PA Las LIFTS US TALAN Tim oooooo O e solder 9o o o o o o 9 gt G a ame 8 0 aes m72 8G CN791 31 2 Noise filter board MUZ GB50VA CN901 To electronic CN902 CN903 control To power To power P C board board board
24. and indoor service manual fan motor M ee All lamps Leftlamp jiLeftlamp Left lamp Leftlamp Leftlamp Leftlamp Left lamp Flash on and off on and 2 flash 3 time flash 4 flash 5 timeflash 6 flash T time flash 14 time flash at0 5 second 0041 Cause Cause Cause Cause Cause Cause e nd 079007 unii Indoorunit Indoor unit Outdoor unit Outdoor unit Outdoorunit Outdoor unit Indoor unit Cause room temp Trouble of Trouble of ik Outdoor e Trouble of Trouble of Other The horizontal Indoor erature indoor fan indoor unit power thermistor outdoor abnormality vane is not Outdoor unit indoor motor control system in outdoor control installed e Mis wiring or thermistor system abnormality unit system correctly trouble of serial signal Refer to Refer to 10 6 Q Check room Refer to Replace the Refer to 10 6 Refer to 10 6 Replace Check 10 2 2 Check of How temperature Check of indoor How to check Check of inverter Flow chart of installation of mis wiring thermistor indoor fan electronic inverter outdoor board or out the detailed the horizontal serial and indoor motor control compressor thermistors door control outdoor unit vane signal error coil thermis P C board electronic fai
25. circuit together in the case that the current limiting resistor is defective When cooling heat exchanger of non operating indoor unit frosts When heating non operating indoor unit get warm 9 Check of LEV Turn on power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely Is click click sound heard Or do you feel vibration of the LEV coil with a hand Disconnect the connector CN795 Is there normal resistance to LEV coil Replace the outdoor electronic control P C board No Replace the LEV coil 28 Replace the noise filter P C board or the outdoor electronic control P C board Replace the outdoor electronic control P C board or power P C board or the compressor When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch Indoor unit does not operate When OPERATION INDICATOR lamp flashes ON and OFF in every 0 5 second Outdoor unit doesn t operate How to check mis wiring and serial signal error when outdoor unit does not work 6 Turn OFF the power supply p Is there rated voltage No Check the power the power supply supply Yes Turn ON the power supply Y Is there rated voltage between No outdoor terminal block S1 and Check the wiring S2 Yes Press EMERGENCY OPERATION switch once Does the left lamp of
26. fin temperature exceeds 87 C during operation P C board temperature 4 times When the P C board temperature exceeds 70 C during operation Check around outdoor unit Check outdoor unit air passage Refer to 10 6 Check of outdoor fan motor 8 time flash Outdoor fan motor Lighting Lighting When failure occurs continuously three times within 30 seconds after the fan gets started Refer to 10 6 Check of outdoor fan motor 9 time flash Nonvolatile memory data Lighting 5 times When nonvolatile memory data cannot be read properly Replace the outdoor electronic control P C board 10 time flash Discharge temperature Lighting Lighting When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 39 C for more than 20 minutes Check refrigerant circuit and refrigerant amount Refer to 10 6 Check of LEV NOTE Blinking patterns of this mode differ from the ones of Troubleshooting check table 10 4 18 MUZ GB50VA The left lamp of OPERATION INDICATOR lamp Indoor unit Abnormal point Failure mode protection LED indication Outdoor P C board LED 1 LED 2 Condition Correspondence Indoor outdoor unit failure mode recall function 11 time flash Communication error between P C boards Lighting 6 times Communication error occurs b
27. 1 1815 29 22 5 45 3 22 0 59 1749 5 10 3 01 0 59 1848 4 90 2 89 0 59 1881 29 24 5 75 2 70 0 47 1815 5 40 2 54 0 47 1898 5 25 0 89 0 17 1947 29 26 6 05 2 12 0 35 1881 5 70 2 00 0 35 1964 5 50 1 93 0 35 2013 30 18 4 90 4 26 0 87 1617 4 50 3 92 0 87 1716 4 30 3 74 0 87 1749 30 20 5 15 3 86 0 75 1683 4 80 3 60 0 75 1766 4 60 3 45 0 75 1815 30 22 5 45 3 43 0 63 1749 5 10 3 21 0 63 1848 4 90 3 09 0 63 1881 30 24 5 75 2 93 0 51 1815 5 40 2 75 0 51 1898 5 25 0 79 0 15 1947 30 26 6 05 2 36 0 39 1881 5 70 2 22 0 39 1964 5 50 2 15 0 39 2013 31 18 4 90 4 46 0 91 1617 4 50 4 10 0 91 1716 4 30 3 91 0 91 1749 31 20 5 15 4 07 0 79 1683 4 80 3 79 0 79 1766 4 60 3 63 0 79 1815 31 22 5 45 3 65 0 67 1749 5 10 3 42 0 67 1848 4 90 3 28 0 67 1881 31 24 5 75 3 16 0 55 1815 5 40 2 97 0 55 1898 5 25 0 68 0 13 1947 31 26 6 05 2 60 0 43 1881 5 70 2 45 0 43 1964 5 50 2 37 0 43 2013 32 18 4 90 4 66 0 95 1617 4 50 4 28 0 95 1716 4 30 4 09 0 95 1749 32 20 5 15 4 27 0 83 1683 4 80 3 98 0 83 1766 4 60 3 82 0 83 1815 32 22 5 45 3 87 0 71 1749 5 10 3 62 0 71 1848 4 90 3 48 0 71 1881 32 24 5 7
28. 1452 5 20 3 69 0 71 1518 26 20 6 13 3 61 0 59 1386 5 88 3 47 0 59 1469 5 70 3 36 0 59 1502 5 50 3 25 0 59 1568 26 22 6 38 3 00 0 47 1436 6 15 2 89 0 47 1526 6 00 2 82 0 47 1568 5 75 2 70 0 47 1634 26 24 6 70 2 35 0 35 1502 6 45 2 26 0 35 1584 6 30 2 21 0 35 1634 6 10 2 14 0 35 1716 26 26 _ 6 90 1 59 0 23 1584 6 70 1 54 0 23 1667 6 60 1 52 0 23 1716 6 40 1 47 0 23 1766 27 18 5 88 4 41 0 75 1320 5 63 4 22 0 75 1386 5 40 4 05 0 75 1452 5 20 3 90 0 75 1518 27 20 6 13 3 86 0 63 1386 5 88 3 70 0 63 1469 5 70 3 59 0 63 1502 5 50 3 47 0 63 1568 27 22 6 38 3 25 0 51 1436 6 15 3 14 0 51 1526 6 00 3 06 0 51 1568 5 75 2 93 0 51 1634 27 24 6 70 2 61 0 39 1502 6 45 2 52 0 39 1584 6 30 2 46 0 39 1634 6 10 2 38 0 39 1716 27 26 _ 6 90 1 86 0 27 1584 6 70 1 81 0 27 1667 6 60 1 78 0 27 1716 6 40 1 73 0 27 1766 28 18 5 88 4 64 0 79 1320 5 63 4 44 0 79 1386 5 40 4 27 0 79 1452 5 20 4 11 0 79 1518 28 20 6 13 4 10 0 67 1386 5 88 3 94 0 67 1469 5 70 3 82 0 67 1502 5 50 3 69 0 67 1568 28 22 6 38 3 51 0 55 1436 6 15 3 38 0 55 1526 6 00 3 30 0 55 1568 5 75 3 16 0 55 1634 28 24 6 70 2 88 0 43 1502 6 45 2 77 0 43
29. 5 3 39 0 59 1815 5 40 3 19 0 59 1898 5 25 0 58 0 11 1947 32 26 16 05 2 84 0 47 1881 5 70 2 68 0 47 1964 5 50 2 59 0 47 2013 NOTE Q Total capacity KW SHF Sensible heat factor DB Dry bulb temperature SHC Sensible heat capacity KW INPUT Total power input W WB Wet bulb temperature 13 2 PERFORMANCE DATA HEAT operation MSZ GB50VA MUZ GB50VA CAPACITY 5 8 KW INPUT 1700 W Rated frequency 75Hz OUTDOOR WB C INDOOR 10 5 0 5 10 15 20 DB C Q Q INPUT Q INPUT Q INPUT Q Q INPUT Q INPUT 15 3 65 1105 4 41 1326 5 16 1496 5 92 1615 6 67 1717 7 37 1768 8 12 1802 21 3 48 1190 4 18 1411 4 93 1564 5 63 1683 6 38 1768 7 08 1819 7 80 1887 26 3 13 1275 3 89 1496 4 58 1649 5 34 1768 6 09 1853 6 79 1904 7 54 1955 NOTE Q Total capacity KW INPUT Total power input W DB Dry bulb temperature WB Wet bulb temperature 9 ACTUATOR CONTROL MUZ GB50VA 9 1 Outdoor fan motor control The fan motor turns ON OFF interlocking with the compressor ON The fan motor turns ON 5 seconds before the compressor starts up OFF The fan motor turns OFF 15 seconds after the compressor has stopped running 5 seconds 15 seconds lt ON Compressor OFF ON Outdoor fan motor O
30. Check of outdoor thirmistors of compressor start up Fin temperature Lightnin 4 times thermistor When short or open circuit is detected in the thermistor during FEES eS nu s uL P C board temperature operation Replace the outdoor electronic control P C board thermistor eplace the outdoor electronic control P C board Ambient temperature When a short or open circuit is detected in the thermistor during thermistor operation heat exch When a short circuit is detected in the thermistor during operation or sa ard d d when an open circuit is detected in the thermistor after 5 minutes in Lightning 5 times emperature Inermisto cooling and 10 minutes in heating of compressor start up Refer to 10 6 8 Check of outdoor thirmistors When a short circuit is detected in the thermistor during operation or Defrost thermistor when an open circuit is detected in the thermistor after 5 minutes of compressor start up mm e When the communication fails between the indoor and outdoor Refer to 10 6 How to check mis wiring and serial signal Lightning 6 times Serial signal unit for 3 minutes Lightning 7 times Nonvolatile memory data When the nonvolatile memory data cannot be read properly Replace the outdoor electronic control P C board Lightning 8 times Current sensor Current sensor protection stop is continuously performed twice Replace the power board ightnin 11 tim Communication error When t
31. EL E12 851 630 OUTDOOR HEAT EXCHANGER E12 938 301 OUTDOOR FAN MOTOR E12 851 501 PROPELLER E12 851 290 5 E12 819 232 CABINET E12 819 009 HANDLE E12 819 521 GUARD E12 065 506 COMPRESSOR RUBBER SET E12 939 900 COMPRESSOR E12 851 661 5 VALVE GAS E12 821 662 STOP VALVE LIQUID E12 851 640 EXPANSION VALVE E12 851 493 EXPANSION VALVE COIL E12 935 490 R V COIL E12 891 961 4 WAY VALVE E12 819 650 VALVE COVER E12 819 245 SERVICE PANEL E12 A88 450 OUTDOOR ELECTRONIC CONTROL P C BOARD E12 935 374 TERMINAL BLOCK E12 823 375 TERMINAL BLOCK E12 A87 337 REACTOR L E12 935 444 NOISE FILTER P C BOARD E12 935 309 AMBIENT TEMPERATURE THERMISTOR RT65 E12 851 308 THERMISTOR SET RT61 RT62 RT68 E12 935 440 POWER BOARD E12 819 233 BACK PANEL OUT E12 817 009 HANDLE E12 851 515 MOTOR SUPPORT E12 127 382 FUSE F801 E12 737 382 FUSE F911 E12 935 385 FUSE 8 VARISTOR F64 NR64 E12 851 936 CAPILLARY TUBE TAPER PIPE RCOJ60 P Go N 3RUBBERS SET SNB130FLDH1 12 7 6 35 DEFROST DISCHARGE OUTDOOR HEAT EXCHANGER Including heat sink and RT64 T3 15AL250V T1AL250V T2AL250V 3 6X42 4x50 G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G 39 RoHS PARTS LIST
32. FF 9 2 R V coil control Heating Sy Seay mo p ON Cooling OFF Dry Qe Fi ie m Ros 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 1 ON T t ai ompressor OFF 1 i ON OFF Outdoor fan ON i i motor OFF 14 9 3 Relation between main sensor and actuator lt MUZ GB50 gt Actuator Outdoor LEV fan motor Sensor Purpose Compressor R V coil Discharge temperature thermistor Protection Indoor pipe temperature thermistor Defrosting Protection Defrost thermistor Defrosting O Outdoor heat exchanger temperature Protection O O O O O e Fin temperature thermistor Protection O O O O O Ambient temperature thermistor Protection 10 TROUBLESHOOTING MUZ GB50VA 10 1 Cautions on troubleshooting 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for mis wiring 2 Take care the following during servicing 1 Before servicing the air conditioner be sure to turn OFF the main unit first with the remote controller and then after confirming the horizontal vane is closed turn off the breaker and or disconnect the power plug 2 Be sure to turn OFF the
33. MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS OUTDOOR UNIT SERVICE MANUAL Wireless type Models MUZ GBSOVA SS SS SS Ss SS Cg SS Ss SS SS SS SS Ss SS SS SS SS SS SS Changes for the Better Revision A Compressor has been Changed Please void OB455 No OB455 REVISED EDITION A utilized R410A Indoor unit service manual MSZ GB VA Series OB454 Refrigerant service manual R410A REFRIGERANT OBRO1 CONTENTS 1 TECHNICAL CHANGES 2 2 PART NAMES AND 3 3 SPECIFICATION nnm 3 NOISE CRITERIA CURVES 5 5 OUTLINES AND DIMENSIONS 6 6 WIRING DIAGRAM ttn 7 7 REFRIGERANT SYSTEM DIAGRAN 8 8 PERFORMANCE CURVES 9 9 ACTUATOR 14 10 TROUBLESHOOTING nnn 15 11 DISASSEMBLY INSTRUCTIONS 34 12 ROHS PARTS 38 NOTE This service manual describes technical data of the outdoor units Revision A Compressor has been changed Mode RoHS PARTS LIST number SNB130FLDH E12 851 900 E12851900 7 SNB130FLDH1 E12 939 900 1 TECHNICAL CHANGES
34. Wet bulb temperature 6 Refrigerant piping length one way 5m 1 Measured under rated operating frequency Power supply Capacity a 2 s wo C 5 o Winding resistance at 20 C Fan motor Specifications and rating conditions of main electric parts Item MUZ GB50VA Current transformer ETQ19Z68AY Current transformer ETQ19Z53AY Smoothing capacitor 560uF 450V Fuse 250V 2A Fuse 250V 3 15A Fuse 250V 1A Expansion valve coil CAM MD12ME Intelligent power module PS21244 A Intelligent power module PS21661 RZ Reactor 340uH 20 Power factor controller PS51259 A Resistor 10Q 10W Resistor 1 10 2W 2 Resistor 0 040 7W Solenoid coil relay TLP3506 Terminal block 3P Terminal block 3P Relay G4A R V coil LD30013 4 NOISE CRITERIA CURVES MUZ GB50VA FAN SPEED FUNCTION SPL dB A LINE COOLING 52 ee HEATING 55 oo High Test conditions Cooling Dry bulb temperature 35C Wet bulb temperature 24 C Heating Dry bulb temperature 7C Wet bulb temperature 6C
35. are under the same temperature humidity condition Operation TEST RUN OPERATION refer to 8 3 25 60 30 70 Dry bulb temperature C Relative humidity MUZ GB50VA kgf cm Gauge MPa Gauge Sof lt 58 5 E d 3 a 5 1 0 5 1 3032 35 C 15 1820 25 30 32 35 50 60 70 50 60 70 Ambient temperature C Ambient temperature C Ambient humidity Ambient humidity HEAT operation Condition Indoor Outdoor Dry bulb temperature C 20 0 2 7 15 20 0 Wet bulb temperature C 14 5 1 6 12 14 5 Operation TEST RUN OPERATION refer to 8 3 MUZ GB50VA Outdoor unit current A Ambient temperature O 11 PERFORMANCE DATA COOL operation Rated frequency 79Hz MSZ GB50VA MUZ GB50VA CAPACITY 5 0 KW SHF 0 69 INPUT 1650 W OUTDOOR DB C INDOOR INDOOR 21 25 27 30 DB C WB C sHc sHF INPUT sHC sHF INPUT a sHC sHF a SHC INPUT 21 18 5 88 3 00 0 51 1320 5 63 2 87 0 51 1386 5 40 2 75 0 51 1452 5 20 2 65 0 51 1518 21 20 6 13 2 39 0 39 1386 5 88 2 29 0 39 1469 5 70 2 22 0 39 1502 5 50 2 15 0 39 1568 22 18 5 88 3 23 0 55 1320 5 63 3 09 0 55 1386 5 40 2 97 0 55 1452 5 20 2 86 0 55 1518 22 20 6 13 2 63 0 43 1386 5 88 2 53 0 43 1469 5 70 2 45 0 43 1502 5 50 2 37
36. capacity 1 5 Correction of Cooling total input Correction of Heating capacity gt of Heating total input a 15 o g 2 8 9 o 8 2 8 8 15 5 1 0 1 0 5 1 0 S PII PIT 5 8 8 1 0 Q E 20 5 8 0 5 gt 8 9 5 2 a s lt J ME 9 50 100 150 29 150 Qs 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 o o o a 8 3 TEST RUN OPERATION How to operate fixed frequency operation Press EMERGENCY OPERATION switch to COOL or HEAT mode COOL Press once HEAT Press twice Test run operation starts and continues to operate for 30 minutes Compressor operates at rated frequency in COOL mode or 58Hz in HEAT mode Indoor fan operates at High speed After 30 minutes test run operation finishes and EMERGENCY OPERATION starts Operation frequency of compressor varies To cancel test run operation EMERGENCY OPERATION press EMERGENCY OPERATION switch or any button on remote controller Q O N 10 Oo O 8 4 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT NOTE The unit of pressure has been changed to MPa based on the international system of units SI unit system The conversion factor is 1 Gauge 10 2 Kgf cm Gauge COOL operation Both indoor and outdoor unit
37. ccording to Releasing the failure mode recall function mentioned above Note1 Make sure to release the failure mode recall function once it s 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 Blinking pattern when outdoor unit is abnormal 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 eee Om X h OFF gt 4 7 4 gt 4 4 gt 7 4 li No beep Beeps pia No beep i Beeps I Repeated cycle Repeated cycle A Repeated cycle 17 3 Outdoor unit failure mode table MUZ GB50VA The left lamp of OPERATION INDICATOR lamp Indoor unit Abnormal point Failure mode protection LED indication Outdoor P C board LED 1 LED 2 Condition Correspondence Indoor outdoor unit failure mode recall function OFF None Normal 2 time flash Outdoor power system Lighting Lighting When over current protection stop is continuously performed three times within 1 minute after the compressor gets started or when converter protection stop or bus bar voltage protection stop is continuously performed three times within 3 minutes after start up Check the connection of the compressor connecting wire Refer to 10 6 How to check inverter compressor Check
38. distance between the antennas and the indoor unit within 3m or is the distance between the antennas and the outdoor unit within 3m Im Is the distance between the No gt Earth the unit Extend the distance between Yes the antennas and the indoor unit and or the antennas and the outdoor unit eG TV sets or radios and the Extend the distance between indoor unit within 1m or is the TV sets and or radios and the distance between the TV the indoor unit or the TV sets sets or radios and the or radios and the outdoor unit outdoor unit within 3m No Are the antennas damaged Is the coaxial cable damaged Replace or repair the antenna Is there any poor contact in Replace or repair the coaxial cable the antenna wiring Is the indoor outdoor Yes Extend the distance between connecting wire of the air the indoor outdoor connecting conditioner and the wiring wire of the air conditioner and the antennas close the wiring of the antennas Even if all of the above conditions is fulfilled the electromagnetic noise may enter depending on the electric field strength or the installation condition combination of specific conditions such as antennas or wiring Check the followings before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagne
39. eceived WARM button to adjust the set temperature to 25 C Y Does left lamp of OPERATION INDICATOR lamp N on the indoor unit blink at the interval of 0 5 seconds OFF Blinks The outdoor unit is abnormal Beep are emitted at the same timing as the blinking of the left lamp of OPERATION INDICATOR lamp 2 Yes Blinks The outdoor unit is abnormal Check the blinking pattern and confirm the abnormal point with the Th td iti outdoor unit failure mode table Refer to 10 2 3 e outagor Unit Is FIOFTTHUS Make sure to check at least two consecutive blinking cycles 3 2 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 Press RESET button of the remote controller Repair the defective parts Release the failure mode recall function according to the left mentioned procedure Deleting the abnormal memorized condition QAfter repairing the unit recall the failure mode again according to Setting up the failure mode recall function mentioned above 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 a
40. etween the electronic control P C board and power board for more than 10 seconds When the communication between boards protection stop is continuously performed twice Check the connecting wire between outdoor electronic control P C board and power board Current sensor Lighting 7 times When a short or open circuit is detected in the current sensor during compressor operating Current sensor protection stop is continuously performed twice Replace the power board Zero cross detecting circuit When zero cross signal cannot be detected while the compressor is operating The protection stop of the zero cross detecting circuit is continuously performed 10 times Check the connecting wire among electronic control P C board noise filter P C board and power board Converter When a failure is detected in the operation of the converter during operation Bus bar voltage 1 When the bus bar voltage exceeds 400 or falls to 200V or below during compressor operating Bus bar voltage 2 When the bus bar voltage exceeds 400V or falls to 50V or below during Replace the power board Even if this protection stop is performed continuously three times it does not mean the abnormality in outdoor power compressor operating System NOTE Blinking patterns of this mode differ from the ones of Troubleshooting check table 10 4 19
41. f failure mode recall function for the indoor outdoor unit Operational procedure The cause of abnormality cannot be found because the abnormality doesn t recur Setting up the failure mode recall function 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 And release the other two buttons after all LCD except the set temperature in operation display section of the remote controller is displayed after 3 seconds MITSUBISHI ELECTRIC Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 1 3 1 Regardless of normal or abnormal a short Does the left lamp of OPERATION INDICATOR beep is emitted once as the signal is received lamp on the indoor unit blink at the interval of 0 5 No Indoor unit is normal seconds OFF But the outdoor unit might be abnormal because there are some Blinks Either indoor or outdoor unit is abnormal abnormalities that can t be recalled with this way Beep are emitted at the same timing Confirm if outdoor unit is abnormal according to the detailed outdoor as the blinking of the left lamp of unit failure mode recall function Refer to 10 2 2 OPERATION INDICATOR lamp 2
42. ght difference Piping size O D mm A B Liquid MUZ GB50VA 30 15 6 35 Max Height difference B Max length A Outdoor unit ADDITIONAL REFRIGERANT CHARGE R410A g Refrigerant piping length one way Outdoor unit precharged 15m Model MUZ GB50VA 1 500 Calculation Xg 20g m X Refrigerant piping length 7 NOTE Refrigerant piping exceeding 7m requires additional refrigerant charge according to the calculation 8 PERFORMANCE CURVES MUZ GB50VA The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions Since operating conditions vary according to the areas where these units are installed The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve 1 GUARANTEED VOLTAGE 207 253 50Hz 2 AIR FLOW Air flow should be set at MAX 3 MAIN READINGS 1 Indoor intake air wet bulb temperature C WB 2 Indoor outlet air wet bulb temperature C WB Cooling 3 Outdoor intake air dry bulb temperature C DB 4 Total input 5 Indoor intake air dry bulb temperature C DB Heating 6 Outdoor intake air wet bulb temperature C WB 7 Total input W Indoor air wet dry bulb temperature difference on the left side of the following chart shows
43. he communication protection stop between boards is Check the connecting wire between outdoor electronic control ganing ames between P C boards continuously performed twice P C board and power board iahtring 125 Zero cross detecting The protection stop of the zero cross detecting circuit is continuously Check the connecting wire among outdoor electronic control mes circuit performed 10 times P C board noise filter P C board and power board Outdoor unit stops and IPM protection When over current is detected after 30 minutes of compressor start up Reconnect compressor connector restarts 3 p Refer to 10 6 How to check inverter compressor Twice Goes out Check the stop valve Wh i ithi repeated Lock protection a aa n current is detected within 30 minutes of compressor Check the power module PAM module 3 times Goes oil Discharge temperature When discharge temperature exceeds 116 C during operation Check the amount of gas and refrigerant circuit protection compressor stops Compressor can restart if discharge temperature Refer to 10 6 Check of LEV thermistor reads 100 C or less 3 minutes later Fin temperature When the fin temperature exceeds 87 during operation Check refrigerant circuit and refrigerant amount protection a n 4 times Goes out Refer to 10 6 0 Check of outdoor fan motor P C board temperature When the P C board t ds 70 C duri brotection en the P C board temperat
44. l an Screws pa of the e cabinet Set screws of the back panel Screw of the valve cover 34 22 OPERATING PROCEDURE PHOTOS 2 Removing the inverter assembly inverter P C board Photo 4 and power board 1 Remove the top panel cabinet and service panel Refer to 1 2 Remove the back panel Refer to 1 3 Disconnect the following connectors lt Electronic control P C board gt CN931 and CN932 Fan motor CN795 LEV CN661 Discharge temperature thermistor defrost thermistor and outdoor heat exchanger temperature thermistor CN663 Ambient temperature thermistor O IL lt Noise filter P C board gt Er CN912 4 way valve Remove the compressor connector Remove the screws fixing the relay panel Remove the inverter assembly Disconnect all connectors and lead wires on the electronic control P C board 8 Remove the electronic control P C board from the inverter assembly 9 Remove the screws fixing the power board assembly 10 Disconnect all connectors and lead wires on the power board 11 Remove the power board from the inverter assembly 12 Disconnect all connectors and lead wires on the noise filter P C board 13 Remove the noise filter P C board from the inverter assembly Screws of the power board assembly 4 5 6 7 Screws of the relay panel 3 Removing R V coil 1 Remove the top pa
45. lure mode tor control recall function Refer to Test board point diagram and voltage 20 10 4 Troubleshooting check table MUZ GB50VA Indication NOTE 1 The location of LED is illustrated at the right figure Refer to 10 7 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 Example When the flashing frequency is 2 0 5 second ON 2 5 second OFF 21 Symptom l poi iti ymp LEDI Red LED2 Yellow bnormal point Condition Condition Correspondence Outdoor unit A Check th tion of th does not When over current protection stop is continuously nec the connection of the compressor connecting operate performed three times within 1 minute after the compressor gets wire Lightning Twice Outdoor power system started or when converter protection stop or bus bar voltage Refer to 10 6 How to check inverter compressor protection stop is continuously performed three times within 3 Check the stop valve minutes after start up When a short circuit is detected in the thermistor during operation or 5 Eom Lightning 3 times Nin temperature when an open circuit is detected in the thermistor after 10 minutes Refer to 10 6 8
46. nd 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 kg cm 0 MPa 5 Detach the welded part of the suction and the discharge pipe connected with compressor Photo 9 6 Remove the compressor nuts 7 Remove the compressor 8 Detach the welded part of 4 way valve and pipe Photo 8 Welded parts of 4 way valve Photo 9 R V coil Welded part of the dis charge pipe Welded part of the suction pipe 7 Removing the reactor Photo 10 1 Remove the top panel Refer to 1 2 Disconnect the reactor lead wire 3 Remove the screws of the reactor and remove the reactor Screws of the reactor 37 RoHS PARTS LIST RoHS compliant 12 12 1 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND MUZ GB50VA FUNCTIONAL PARTS 25 24 12 10 38 RoHS PARTS LIST RoHS compliant MUZ GB50VA 12 1 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration Symbol Q ty unit Part No Part Name in Wiring MUZ GB Remarks Diagram DUUM E12 819 297 PAN
47. nel cabinet and service panel 2 Remove the back panel Refer to 1 3 Remove the inverter assembly Refer to 2 4 Remove the R V coil Photo 9 35 OPERATING PROCEDURE PHOTOS 4 Removing the defrost thermistor discharge temper Photo 5 ature thermistor outdoor heat exchanger tempera ture thermistor and ambient temperature thermistor 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 Pull out the defrost thermistor from its holder Photo 6 5 Pull out the discharge temperature thermistor from its holder Photo 5 6 Pull out the outdoor heat exchanger temperature thermistor from its holder Photo 6 7 Pull out the ambient temperature thermistor from its holder Discharge temperature thermistor Photo 6 Photo 6 Outdoor heat exchanger Ambient temperature thermistor temperature thermistor 5 Removing outdoor fan motor Photo 7 1 Remove the top panel cabinet and service panel Screws of the outdoor fan motor Refer to 1 2 Remove the back panel Refer to 1 3 Remove the inverter assembly Refer to 2 4 Remove the propeller 5 6 Remove the screws fixing the fan motor Remove the fan motor Propeller 36 2 OPERATING PROCEDURE PHOTOS 6 Removing the compressor and 4 way valve 1 Remove the top panel cabinet a
48. power supply before removing the front panel the cabinet the top panel and the electronic control P C board 3 When removing the electrical parts be careful to the residual voltage of smoothing capacitor 4 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 5 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires X O 15 Lead wiring Housing point 3 Troubleshooting procedure 1 First check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality To make sure check how many times the abnormality indication is flashing on and off before starting service work 2 Before servicing check that the connector and terminal are connected properly 3 If the electronic control P C board is supposed to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 When troubleshooting refer to 10 2 10 3 and 10 4 15 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 4 disappears the memorized failure details can be recalled This mode is very useful when the unit needs to be repaired for the abnormality which doesn t recur 1 Flow chart o
49. r is Check the connecting wire among outdoor electronic control gning protection operating P C board noise filter P C board and power board Outdoor electronic control P C board Parts side LED2 LEDI 1 Mou Lighting gt ON Indication 22 Symptom Abnormal point Condition Condition Correspondence No symptom TED Red LED2 Yellou P n P Outdoor unit Primary current protection When the input current exceeds 15A These symptoms do not mean any abnormality of the 20 operates Once Lighting product but check the following points Secondary current protection When the current of the compressor exceeds 15 Check if indoor filters are clogged me High pressure protection When the indoor gas pipe temperature exceeds 45 C during heating Check if refrigerant is short Twice Ligh ng Check if indoor outdoor unit air circulation is short cycled Defrosting in cooling When the indoor gas pipe temperature falls 3C or below during cooling Discharge fenmparalur Check refrigerant circuit and refrigerant amount 22 3 times Lighting t i When the discharge temperature exceeds 100 C during operation Refer to 10 6 Check of LEV Refer to 10 6 8 Check of outdoor thermistors a When the frequency of the compressor is kept 80Hz or more and I 2 23 4 limes Lightin Low discharge the discharge temperature is kep
50. ronic control P C board and 0 8 second ON quick blinking Lighted Parts side or not Yes lighted 3 2 Be careful to the residual Evi LEDI voltage of smoothing capacitor Q Turn OFF the power supply Remove the short circuit between Is there any error of the men 2 indoor outdoor connecting wire Yes Replace the Lighted Blinking iS qnare amplitude of 10 te 20V DC No such as the damage of the wire indoor outdoor between outdoor terminal block S2 intermediate connection poor connecting wire A 53 Confirmation of serial contact to the terminal block OFF inverter controlled lighting signal gt No equipment Yes Turn OFF the power supply and then turn ON again Press EMERGENCY OPERATION x Is there any error of the switch Is there rated voltage between indoor outdoor connecting wire Replace the Reinstall indoor terminal block S1 and S2 Such as the damage of the wire indoor outdoor either the lt Confirmation of power voltage gt intermediate connection poor connecting wire unit or the Yes contact to the terminal block light each No Is serial signal other away error indicated Attach a filter 6 minutes later on remote control Repl section of Be sure to release the failure mode 5 tho indoor recall function after checking 29 0 Electromagnetic noise enters into TV sets or radios Is the unit earthed Yes Is the
51. t under 39 C for more than 20 Refer to 10 6 0 Check of LEV gnting temperature protection minutes Check refrigerant circuit and refrigerant amount This symptom does not mean any abnormality of the mw but check the following points wa Cooling high pressure When the outdoor heat exchanger temperature exceeds 58 C product but cneck PORS 24 5 times Lighting protection duri Check if indoor filters are clogged uring operation Check if refrigerant is short Check if indoor outdoor unit air circulation is short cycled Outdoor unit 25 operates 9 times Lighting Inverter check mode When the unit is operated with emergency operation switch 26 Lighting Lighting Normal 10 5 Trouble criterion of main parts MUZ GB50VA Part name Check method and criterion Defrost thermistor RT61 Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 Discharge temperature thermistor RT62 Fin temperature thermistor RT64 Measure the resistance with a tester Refer to 10 7 Test point diagram and voltage 1 Outdoor electronic control P C board the chart of thermistor Measure the resistance with a tester Before measurement hold the thermistor with your hands to warm it up Refer to 10 7 Test point diagram and voltage 1 Outdoor electronic control P C board the chart of thermistor Compressor Measure the resistance bet
52. the difference between the indoor intake air wet dry bulb temperature and the indoor outlet air wet dry bulb temperature for your reference at service How to measure the indoor air wet bulb dry bulb temperature difference 1 Attach at least 2 sets of wet and dry bulb thermometers to the indoor air intake as shown in the figure and at least 2 sets of wet and dry bulb thermometers to the indoor air outlet The thermometers must be attached to the position where air speed is high Attach at least 2 sets of wet and dry bulb thermometers to the outdoor air intake Cover the thermometers to prevent direct rays of the sun Check that the air filter is cleaned Open windows and doors of room Press the EMERGENCY OPERATION switch once twice to start the EMERGENCY COOL HEAT MODE When system stabilizes after more than 15 minutes measure temperature and take an average temperature 10 minutes later measure temperature again and check that the temperature does not change INDOOR UNIT OUTDOOR UNIT Wet and dry bulb Wet and dry bulb thermometers thermometers FRONT VIEW BACK VIEW 8 1 Capacity and input curves Cooling capacity Total input cooling
53. the stop valve 3 time flash Discharge temperature thermistor Lighting Once Defrost thermistor Lighting Once Ambient temperature thermistor Lighting Twice Fin temperature thermistor Lighting 3 times P C board temperature thermistor Lighting 4 times Outdoor heat exchanger temperature thermistor Lighting 9 times When thermistor shorts or opens during compressor running Refer to 10 6 8 Check of outdoor thermistors Replace the outdoor electronic control P C board Refer to 10 6 8 Check of outdoor thermistors 4 time flash Over current When 28 current flow into intelligent power module Reconnect compressor connector Refer to 10 6 How to check inverter compressor Check the stop valve 5 time flash Discharge temperature Lighting Lighting When discharge temperature exceeds 116 C during operation Compressor can restart if discharge temperature thermistor reads 100 C or less 3 minutes later Check refrigerant circuit and refrigerant amount Refer to 10 6 Check of LEV 6 time flash High pressure Lighting Lighting When the outdoor heat exchanger temperature exceeds 70 C during cooling or the indoor gas pipe temperature exceeds 70 C during heating Check refrigerant circuit and refrigerant amount Check the stop valve 7 time flash Fin temperature When the
54. tic 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 5 Electric field intensity of the broadcast station affected by the electromagnetic noise 6 Presence or absence of amplifier such as booster 7 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 electromagnetic 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 After checking the above consult the service representative 30 10 7 Test point diagram and voltage 1 Outdoor electronic control P C board MUZ GB50VA Defrost thermistor RT61 Ambient temperature thermistor RT65 Fin temperature thermistor RT64 Outdoor heat exchanger temperature thermistor RT68
55. to Releasing the failure mode recall function mentioned above Note1 Make sure to release the failure mode recall function once it s set up otherwise the unit cannot operate properly 2 lf the abnormal condition is not deleted from the memory the last abnormal condition is kept memorized 2 Blinking pattern when the indoor unit is abnormal Blinking at 0 5 Blinking at 0 5 lt 5 second OFF Second interval gt lt 5 second OFE Second interval p OFF lt gt lt lant Li lt gt Vo 4 lt Beeps Beeps Beeps Repeated cycle Repeated cycle it Repeated cycle X3 Blinking pattern when the outdoor unit is abnormal mE Blinking at 0 5 Blinking at 0 5 2 5 5 OFF 3 second ON gt a Second interval lt 5 second OFF 3 second ON second interval RR OFF L HeH 4 co 9 6 o op lt Beeps No beep i Beeps Repeated cycle Repeated cycle Repeated cycle 16 2 Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal Confirm if outdoor unit is abnormal according to the following procedures Vv Confirm that the remote controller is in the failure mode recall function y 3 4 Regardless of normal or abnormal 2 short With the remote controller headed towards the indoor unit press TOO COOL or TOO beeps are emitted as the signal is r
56. ure exceeds uring operation High pressure When the outdoor heat exchanger temperature exceeds 70 C Check around of gas and the refrigerant circuit protection during cooling or when indoor gas pipe temperature exceeds 70 Check of stop valve 5 times Goes out during heating i When a failure i in th ion of th i 8 times Converter protection fai ure is detected in the operation of the converter during Replace the power board Bus bar voltage When the bus bar voltage exceeds 400V or falls to 200V or below rotection 1 during compressor operating Replace the power board donc voltage When the bus bar voltage exceeds 400V or falls to 50 or below p P protection 2 during compressor operating When failure occurs continuously three times within 30 seconds after P M 13 times Goes out Outdoor fan motor the fan gets started Refer to 10 6 0 Check of outdoor fan motor n Current sensor When a short or open circuit is detected in the current sensor during Lighting 8 times brotection compressor operating Replace the power board Light i Communication between P C Communication error occurs between the outdoor electronic control P C Check the connecting wire between outdoor electronic control ighting imes boards protection board and power board for more than 10 seconds P C board and power board Lightin 12 times Zero cross detecting circuit When zero cross signal cannot be detected while the compresso
57. ween terminals using a tester Winding temperature 10 C 40 C Normal 0 400 0 490 U WHT BLK Outdoor fan motor Measure the resistance between lead wires using a tester Part temperature 10 C 40 C Color of lead wire Normal RED BLK BLK WHT 13 40 16 40 WHT RED R V coil Measure the resistance using a tester Part temperature 10 C 40 C Normal 2 6kQ 3 3kQ Linear expansion valve Measure the resistance using a tester Part temperature 10 40 C Color of lead wire Normal WHT RED RED ORN VIW BAN 37 40 53 90 BRN BLU YLW BRN BLU 23 10 6 Troubleshooting flow MUZ GB50VA How to check inverter compressor Disconnect the terminal of the compressor 3 minutes after turning on the power supply start EMERGENCY OPERATION Measure the voltage between each lead wire leading to the compressor U BLK V WHT V WHT W RED W RED U BLK Is voltage output on right table After the outdoor fan starts running wait for 1 minutes or more before measuring the voltage output voltage values have the tolerance of 20 COOL HEAT No 122V 154V 74V 126V 56Hz 71Hz 30Hz 58Hz Yes v lt Is output balanced gt No Yes Is the input voltage to the outdoor electronic No

Mitsubishi Electronics MUZ-GB50VA Network Router User Manual

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