MSC-GA20VB - MSC-GA25VB - MSC-GA35VB -E1
Contents
1. Room temperature Varistor thermistor RT11 NR11 Indoor coil thermistor 12 point JPG JPS Refer to 8 1 D 7 3 Aem Emergency rr operation switch Timer short mode HH TE FIHI 35 3223 F232 Refer to 8 4 J33 6 J23 sets the Auto restart Power monitor BV DC function ON OFF receiver P C board switches over MU amp MUX type MUH amp MXZ type Indoor coil thermistor RT12 Room temperature thermistor RT11 CN302 Resistance kQ 0 1020 30 40 50 60 Temperature C 10 DISASSEMBLY INSTRUCTIONS lt Terminal with locking mechanism Detaching points gt The terminal which has the locking mechanism can be detached as shown below There are two types Refer to 1 and 2 of the terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out Check the shape of the terminal before detaching 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Slide the sleeve Hold the sleeve and Pull the terminal while pull out the terminal pushing the locking slowly lever Connector MSC GA20VB MSC GA25VB MSC GA35VB OPERATING PROCEDURE PHOTOS 1 Removing the front panel 1 Remove the screw caps of the front panel Photo 1 Remove the screws 2 Pull the panel down to your side slightly and unhook the2. REMOTE CONTROLLER 1 11 1 10 02 527 083 REMOTE CONTROLLER HOLDER 1 1 1 11 20 PARTS LIST non RoHS compliant MSC GA20VB MSC GA25VB MSC GA35VB 11 3 INDOOR UNIT ELECTRICAL PARTS 11 4 INDOOR UNIT HEAT EXCHANGER AND FUNCTIONAL PARTS This figure shows MSC GA35VB 11 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration Symbol Part Name in Wiring MSC GA20VB MSC GA25VB MSC GA35VB Diagram E1 1 1 1 1 E02 001 504 SLEEVEBEARING 1 2 E02 61 702 DRAINHOSE 1 1 1 3 E02 749 235 NOZZLEASSEMBLY 1 1 1 02 781 040 VANEUPPER 1 E02 781 041 VANELOWER 1 E02 127 382 m 1 7 E02 829 385 __ 1 02 763 034 VANECRANKSET 1 E02 815 468 POWER MONITOR RECEIVER P C BOARD 1 wife ses ncmo ERN 11 gt 315 ___ p NENNEN E02 963 452 ELECTRONIC CONTROL P C BOARD E02 964 452 ELECTRONIC CONTROL P C BOARD E02 749 303 VANE MOTOR 1 1 12 E02 151 308 TEMPERATURE THERMISTOR 1 1 1 13 E02 749 333 MOTORBAND 1 1 1 14 E02 691 375 TERMINALBLOCK TB 1 1 1 E02 749 300 INDOOR FAN MOTOR RCAV19 00 1 1 E02 751 300 INDOOR MOTOR RCAV19 00 Be 16 E02 749 307 INDOOR COIL THERMI
3. board Remove batteries before modification The board has a print as shown below NOTE For remodelling take out the batteries and press the OPERATE STOP ON OFF button twice or 3 times at first After finish remodelling put back the batteries then press the RESET button Remote controller model KP1A J1 _ NN Remote controller model KM04F board has the print J1 and J2 Solder J1 and J2 according to the number of indoor unit as shown in Table 1 After modification press the RESET button Table 1 D 1 unit operation 2 units operation 3 units operation 4 units operation No modification Same as at left Same as at left Same as at left Solder J1 Same as at left Same as at left ____ ____ O Nost SoMerJ2 Same as at left 7 1224 71 1 Solder both and J2 How to set the remote controller exclusively for particular indoor unit After you turn the breaker ON the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit The indoor unit only accepts the signal from the remote controller that has been assigned to the indoor unit once they are set The setting will be cancelled if the breaker has turned OFF or the power supply has shut down Please conduct the above setting once again after the power has restored 8 3 REMOTE CONTROLLER How to set the type This remote controller setting needs to be swit
4. catches at the top Screws of the front panel 2 Removing the electronic control P C board and the Photo 2 power monitor receiver P C board Terminal block NOTE In case of removing only indoor electronic control fixing screw P C board work 3 is not necessary Screw of the Indoor electronic 1 Remove the front panel Refer to 1 earth wire N control P C board 2 Remove the power monitor receiver P C board holder from the bottom of electrical box 3 Open the power monitor receiver P C board holder and remove the power monitor receiver P C board 4 Remove the screw of the electrical cover and the electrical cover Remove the screw of the clamp and the clamp ES e PRINCI Remove the screw of the cord clamp and the cord clamp eee Remove the screw of the terminal block Remove the screw of the earth wire Pull out indoor electronic control P C board slightly 10 Disconnect all except CN101 the connectors on the elec tronic control P C board Remove the electronic control P C board Disconnect the connector of power monitor receiver P C board CN101 on the electronic control P C board Power monitor receiver P C board holder Cord clamp fixing screw Screw of the electrical cover OPERATING PROCEDURE PHOTOS 3 Removing the electrical box Indoor coil thermistor Vane motor 1 Remove the front panel Refer to 1 Photo 3 connector connector 2 Remove the electrical cover Re
5. Outdoor unit doesn t operate even in Test Run Indoor unit operates Outdoor unit doesn t operate normally doesn t stop even if indoor unit stops operation 2 MUH GA20 GA25 GA35VB MUX 2A28 2A59 3A60 SA63 2A70 4A73VB Refer to Check of outdoor unit Indoor Outdoor unit Mis wiring or trouble of serial signal Refer to 9 5 How to check mis wiring signal error Whe and serial n outdoor unit doesn t work x Refer to Outdoor unit MU GA20 GA25 GA35VB Check of wiring diagram of outdoor unit MUH GA20 GA25 GA35VB Check of outdoor unit 2 time flash Cause Indoor unit Trouble of room temp erature indoor coil thermistor Check room temperature thermistor and indoor coil thermis tor Hefer to 9 6 Test point diagram and voltage 3 time flash Cause Indoor unit Trouble of indoor fan motor Refer to 9 5 Check of indoor fan motor 1 lt The case of the trouble of the serial signal When the power is turned off and then turned on again the indication shows the trouble of mis wiring 2 Test Run operation means the operation within 30 minutes after EMERGENCY OPERATION switch is pressed Unit doesn t operate normal operation in COOL or HEAT mode MUH GA20 GA25 GA35VB MXZ A14 A18 A26 A32WV Refer to Check of R V coil and others 4 time flash Cause Indoor unit Trouble of indoor un
6. not depend on the shape of lamp flashing Operation Indicator TNT RT Flashing of the OPERATION INDICATOR lamp on the left hand side indicates possible abnormalities OPERATION INDICATOR lamp on the left hand side is lighting during normal operation SZ Before taking measures make sure that the symptom reappears for accurate troubleshooting Self check table Check switch SW2 MU amp MUX type or MUH amp Check wiring visual check and conductivity check Check indoor electronic control P C board Check outdoor DEICER board and others Check electrical parts MUH or MXZ type X i _ SOF Mis wiring 908080080080 or Serial signal 0 5 second OFF Outdoor unit When serial signal from outdoor unit stops for does not run 4 to 5 seconds Indoor coil Check resistance of thermistor 2 time flash Room temperature 60060000080800 2 5 second OFF Outdoor unit does not run Detect Indoor coil room temperature thermis tor short or open circuit every 8 seconds dur ing operation thermistor Reconnect connector Check indoor electronic control P C board thermistor Disconnect connector CN211 and then check connector CN121 to make sure rotational frequency feedback signal of 1 5V or over exists Check indoor electronic control P C board Check indoor fan motor Reconnect connector Indoor fa
7. the operation mode of Replace the indoor electronic control P C board Check the inverter output Check the compressor Check outdoor DEICER board and others Check resistance of thermistor Reconnect connector Refer to outdoor unit service manual Check outdoor DEICER board and others Refer to outdoor unit service manual Refer to Check of LEV Check refrigerant circuit and refrigerant amount Check outdoor electronic control P C board Refer to outdoor unit service manual Unify the operation mode if Lighted MW Flashing indoor unit that has operated at first has the SER priority does not run 13 9 4 Trouble criterion of main parts MSC GA20VB MSC GA25VB MSC GA35VB Check method and criterion Room Measure the resistance with a tester temperature Part temperature 10 C 30 C Indoor coil MSC GA20 GA25 GA35VB Open or thermistor RT12 20kQ short circuit Measure the resistance between the terminals with a tester Coil wiring temperature10 C 30 C Color of Abnormal lead wire 5 20 25 MSC GA35VB WHT BLK 271 2950 215 2330 Indoor fan BLK RED 180 196Q 305 3310 short circuit motor MF INNER FUSE 13623 C Measure the voltage Power ON CUT OFF Color of Normal Abnormal lead wire MSC GA20 GA25 GA35VB BRN YLW 4 5 5 5V When fan revolved one time Remain OV or 5V YLW GRY 0
8. 1 14 12 751 300 NpoORFANMOTORRON TEC MF 10104 eene 16 6 E12 749 307 INDOORCOILTHERMSTOR RTI2 1 1 1 17 G E12 A59 302 LINEFLOWFAN 1 1 1 G E12 408 509 BEARING MOUNT 1 J 1 X G E12 751 509 BEARINGMOUNT 1 1916 E12 749 385 VARISTOR NRI2 1 1 1 G 5 G 6 G E12 A49 382 8 KIC AUTO RESTART 12 4 INDOOR UNIT HEAT EXCHANGER 2 A59 620 INDOOR HEAT EXCHANGER 1 J 1 O 7o E12 A61 620 INDOOR HEAT EXCHANGER 040000 12 151 666 UNDONGAS 1 1 1 5 21 2216 E12 151 667 UNION LIQUID 1 1 1 6 5 23 13 OPTIONAL PARTS AIR CLEANING FILTER AIR CLEANING FILTER removes fine dust of 0 01 micron from air by means of static electricity Normal life of AIR CLEANING FILTER is 4 months However when it becomes dirty replace it as soon as possible Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet DO NOT reuse AIR CLEANING FILTER even if it is washed DO NOT remove or attach AIR CLEANING FILTER during unit operation MSC GA20VB MSC GA25VB MAC 1300FT MSC GA35VB Air cleaning filter White bellows type a MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2005 MITSUBISHI ELECTRIC E
9. A20VB MSC GA25VB D ume 9 Test conditions Test conditions Cooling DB27 C WB19C Cooling DB27 C WB19C Heating DB20C WB C Heating DB20C WB C NC 70 DERERLMLIDL 70 NC 70 60 50 AU 40 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR 2 lt WAP P Va 30 4424704 MEME z 25 NV OCTAVE BAND SOUND PRESSURE LEVEL dB 0 0002 MICRO BAR pele lle role ane Lad 7 E TERESHOLD OF i HEARING FOR x x CONTINUOUS NOISE 63 125 250 500 1000 2000 4000 8000 APPROXIMATE TERESHOLD OF NC gt HEARING FOR CONTINUOUS NOISE 63 125 250 500 1000 2000 4000 8000 20 20 z 9 M j 1 BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz MSC GA35VB meamna s 9 Test conditions Cooling DB27C Medis Heating DB20C NS E scs INDOORUNIT 2 WALL EE TERESHOLD CONTINUOUS MICROPHONE 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz 5 OUTLINES AND DIMENSIONS MSC GA20VB 81 5 133 5 ib Unit mm MSC GA25VB Installation plate NENNT Indoor unit M E S a SF 81 5 Wall hole 265 9 Installation plate Liquid line 6 35 0 5m Gas line 9 52 0 43
10. C board has been changed 3 Air cleaning filter has been changed to optional parts 4 Fan motor has been changed 5 Fan motor capacitor has been changed 6 Color of indoor unit has been changed m 1 MSC A09YV gt MSC GA25VB En 1 Indication of capacity has been changed base gt kW 2 P C board has been changed 3 Air cleaning filter has been changed to optional parts 4 Fan motor has been changed 5 Fan motor capacitor has been changed 6 Color of indoor unit has been changed MSC A12YV E1 gt MSC GA35VB 1 Indication of capacity has been changed base gt kW 2 P C board has been changed 3 Air cleaning filter has been changed to optional parts 4 Fan motor has been changed 5 Fan motor capacitor has been changed 6 Color of indoor unit has been changed 2 PART NAMES AND FUNCTIONS MSC GA20VB MSC GA25VB MSC GA35VB Air cleaning filter option Front panel white bellows type Sez Catechin air filter With deodorizer Power supply cord Remote control receiving section Vertical vanes Horizontal vane Remote controller Operation section Display section When the front panel is opened Operation indicator lamp Remote control receiving section _ NN MSC GA20VB MSC GA25VB MSC GA35VB ACCESSORIES Battery AAA for remote controller Wireless remote controller Felt tape Used for left or l
11. Changes for the Better MITSUBISHI _ ELECTRIC SPLIT TYPE AIR CONDITIONERS Please void OB385 SPLIT TYPE HEAT PUMP AIR CONDITIONERS INDOOR UNIT SERVICE MANUAL Wireless type Models MSC GA20VB MSC GA25VB MSC GA35VB Outdoor unit service manual MU GA VB Series OB386 MUH GA VB Series OB387 MUX A VB Series OB384 MXZ A WV Series OB319 CONTENTS 1 TECHNICAL CHANGES 3 2 PART NAMES AND 3 OUCBECIEICATION S eene 5 A NOISE CRITERIA CURVES 5 5 OUTLINES AND DIMENSIONS 6 6 WIRING DIAGRAM 022 7 7 REFRIGERANT SYSTEM 8 8 SERVICE FUNCTIONS 8 9 TROUBLESHOOTING nnm 11 10 DISASSEMBLY INSTRUCTIONS 18 o ec c RE 20 12 RoHS PARTS 6 22 13 OPTIONAL PARTS BACK PAGE NOTE This service manual describes technical data of the indoor units RoHS compliant products have lt G gt mark on the spec name plate For servicing of RoHS compliant products refer to the RoHS PARTS LIST RoHS compliant Revision RoHS PARTS LIST has been added 1 TECHNICAL CHANGES MSC A07YV E1 gt MSC GA20VB 1 Indication of capacity has been changed BTU base gt kW 2 P
12. LLER SYMBOL INDOOR MOTOR NNER FUSE RT12 NDOORCOILTHERMISTOR _ TT NOTE 1 About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block LT T T3 Connector 7 REFRIGERANT SYSTEM DIAGRAM MSC GA20VB MSC GA25VB MSC GA35VB Refrigerant pipe 49 52 Unit mm with heat insulator Indoor coil thermistor Indoor heat exchanger Room temperature thermistor RT 11 Refrigerant flow _ Refrigerant pipe 46 35 in cooling with heat insulator 8 SERVICE FUNCTIONS MSC GA20VB MSC GA25VB MSC GA35VB 8 1 TIMER SHORT MODE For service set time can be shortened by short circuit of JPG and JPS the electronic control P C board The time will be shortened as follows Refer to 9 6 Set time 1 minute gt 1 second Set time minutes 3 second It takes minutes for the compressor to start operation However the starting time is shortened by short circuit of JPG and JPS 8 2 P C BOARD MODIFICATION FOR INDIVIDUAL OPERATION A maximum of 4 indoor units with wireless remote controllers can be used in a room In this case to operate each indoor unit individually by each remote controller P C boards of remote controller must be modified according to the number of the indoor unit How to modify the remote controller P C
13. NCY OPERATION switch Yes Turn OFF the Replace the vane Turn OFF the power supply motor power supply Replace the fuse Yes Is winding resistance of vane motor Is fuse F11 blown Replace the indoor electronic control P C board Be sure to check both fuse Be sure to check both resistances and varistor in any case Is winding resistance of Is varistor NR11 burnt fan motor 0 Q Yes Replace the varistor Replace the fan motor 15 When OPERATION INDICATOR lamp flashes 0 5 second intervals or 1 time Outdoor unit does not operate lt MUH GA20 GA25 GA35VB MXZ A14 A18 A26 A32WV gt How to check mis wiring and serial signal error X 1 Set the switch SW2 on indoor electronic control P C board to MU or MUX type when the outdoor unit is MU or MUX type If the setting is MUH or MXZ type the unit does not work etat 2 Short circuit of JPG and JPS on the indoor electronic control P C board enables self check to be displayed in 3 seconds Turn OFF the power supply indoor outdoor unit Is the outdoor unit MUH type Set the switch SW2 on the indoor electronic control P C board to MU or MUX type 1 Turn ON the power supply indoor outdoor unit Yes Press once EMERGENCY OPERATION switch min later check the self check result Does the unit operate displayed on OPERATION INDICATOR No lamp on indoor unit 2 Refer to the I
14. NGINEERING CO LTD Distributed 2006 No OB385 REVISED EDITION A 6 mE Distributed Jan 2005 385 6 New publication effective 2006 Made in Japan Specifications subject to change without notice
15. ONTROLLER 9 12 749 426 REMOTE CONTROLLER 1 1 1 10 6 12 527 083 CONTROLLER HOLDER 03 41 3 101 1 11 O 22 ROHS PARTS LIST RoHS compliant MSC GA20VB MSC GA25VB MSC GA35VB 12 3 INDOOR UNIT ELECTRICAL PARTS 12 4 INDOOR UNIT HEAT EXCHANGER AND FUNCTIONAL PARTS This figure shows MSC GA35VB 12 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration Symbol Part Name in Wiring MSC GA20VB MSC GA25VB MSC GA35VB Diagram E1 E1 1 E12 001 504 1 E12 001 504 SLEEVE BEARING we 2 G E12 897 702 DRAINHOSE ___1 __ 3 0 E12 59 235 NOZZLE ASSEMBLY __ 1 4 G E12 781 040 E12 781 041 VANELOWER _____ FUSE 1 T315AL250V E12 829 385 VARISTOR KENNEN E12 763 034 CRANK SET E12 815 468 POWERMONITOR RECEIVERP C BOARD E12 962 452 ELECTRONICCONTROLPCBOARD G E12 963 452 ELECTRONCCONTROLECBOARD amp 1 G E12 964 452 ELECTRONCCONTROLPCBOARD q1 AUTORESTART 11 G E12 749 303 VANE MOTOR 1 1 1d l 12 G E12 151 308 ROOMTEMPERATURETHERMSTOR 1 Z 1 1 13 G E12 749 333 MOTOR BAND 1 1 1 14 G E12 691 375 TERMINALBLOCK TB 1 1 1 PO 2 749 300 NDOORFANMOTORRCVIBCE MF
16. STOR RT12 1 1 1 17 E02 749 302 LINEFLOWFAN 1 1 1 02 408 505 BEARING MOUNT 1 E02 751 59 BEARING MOUNT 0 o T 49 E02 749 385 VARISTOR 2 1 1 11 11 4 INDOOR UNIT HEAT EXCHANGER E02 749 620 INDOORHEATEXCHANGER 1 1 7 E02 751 620 INDOORHEATEXCHANGER 02 151 666 UNION GAS o __1__ __1___ 79952 E02 815 666 UNION GAS 41121 199 52 22 02 151 667 UNION LIQUID 12112121 6 5 21 12 ROHS PARTS LIST RoHS compliant MSC GA20VB MSC GA25VB MSC GA35VB 12 1 INDOOR UNIT STRUCTURAL PARTS 12 2 ACCESSORY AND REMOTE CONTROLLER 1 10 Optional parts See 13 ir These figures show about MSC GA35VB 12 1 INDOOR UNIT STRUCTURAL PARTS Symbol Q ty unit Diagram E1 E1 G r2 78 24809 14 La 31 1 G Ei2 764 234 BOX G Ei2 959 000 PANELASSEMBIY 1 3 G Ei2 763 067 SCREWCAP 2 2 2 pgPCSSET 4 G Ei2 959 010 FRONTPANEL 1 1 1 5 G Ei2 408 142 _____ 2 2 2 2 763 100 CATECHIN AIR FILTER 2 __ 2 G Ei2 764 100 CATECHIN AIR FILTER 2 JPCESET _ 7 G Ei2 763 975 CORNER BOX RIGH 1 1 1 2 408 970 INSTALLATIONPLATE 1 1 6 2 751 970 INSTALLATIONPLATE 1 14 12 2 ACCESSORY AND REMOTE C
17. V35V20V Approx Measure the resistance between the terminals with a tester Part temperature10 C 30 C MSC GA20 GA25 GA35VB Open or 240 2600 short circuit 9 5 Troubleshooting flow When OPERATION INDICATOR lamp flashes 3 time Indoor fan motor doesn t operate Check of indoor fan motor Turn OFF the power supply Check connector CN211 visually Are lead wires connected Yes Disconnect lead wires from connector CN211 on indoor electronic control P C board Measure resistance between lead wires No 1 and No 5 and then No 3 and No 5 Motor part Sensor part No ee Is soldered point of the connector correctly soldered Reconnect the lead wires Turn ON the power supply Stop it if the unit operates Insert screwdriver into air outlet to rotate indoor fan motor slowly for 1 revolution or over and measure volt age No 2 and No 3 on CN121 Is resistance 0 short circuit or co open circuit Yes 0 or e No Repair or replace the indoor fan motor Does voltage repeat OV DC and 5V DC Yes Replace the indoor electronic control P C board Indoor unit operates by pressing the EMERGENCY OPERATION switch but doesn t operate with the remote controller Check of remote controller and receiver P C board Check the remote controller is exclusive for this air conditioner Switch on the remote controller No Is LCD display on the remote con troller displayed Rep
18. ched according to the type of air conditioner COOL amp HEAT or COOL ONLY If the setting is incorrect the air conditioner does not operate normally Therefore check if the setting corresponds to the type of air conditioner If not correct the setting as shown below Slide switch EN D 6 COOL amp HEAT COOL ONLY The position of the slide S S switch S 1 _ O 8 4 amp MUX amp 2 TYPE SWITCH OVER AND AUTO RESTART FUNCTION 1 amp MUX MXZ SWITCH OVER SW2 O sets the AUTO RESTART FUNCTION ON OFF The indoor units for MU amp MUX type and amp MXZ type SW2 switches over the MU amp MUX type amp MXZ type are common specifications Set switch according to the type of outdoor unit The units are set for MXZ type when they are shipped from the factory When the units are shipped from the factory SW2 15 as follows SW2 O AUTO RESTART FUNCTION ON SW2 amp MXZ type How to switch over MU amp MUX MXZ 1 Turn OFF the main power for the unit 2 Pull out the electronic control P C board and change switch SW2 on the indoor electronic control P C board LD105 according to the type of outdoor unit as following figures s 9 gt FRONT om SW2 SW2 the indoor outdoor connecting wire is incorrectly 2 i connected
19. e electronic control P C board 3 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 4 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires Lead wiring Housing point 3 Troubleshooting procedure 1 First check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality To make sure check how many times the abnormality indication is flashing on and off before starting service work 2 If the electronic control P C board is supposed to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 3 When troubleshooting refer to 9 2 Instruction of troubleshooting and 9 3 Troubleshooting check table 4 How to replace batteries Weak batteries may cause the remote controller malfunction In this case replace the batteries to operate the remote controller normally Remove the front lid and insert batteries Press the RESET button Then reattach the front lid 5 Insert the negative pole of the batteries first Check if the polarity of the batteries are correct RESET button NOTE1 If the RESET button is not pressed the remote controller may not operate correctly NOTE2 INFORMATION FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT MXZ A14WV MXZ A18WV MXZ A26WV MXZ A32WV M
20. eft rear piping REMOTE CONTROLLER Signal transmitting section Operation display section OPERATE STOP ON OFF button O00 qmen Open the front lid Indication of remote controller model is on back 55 ON OFF 00 WARM FAN SPEED CONTROL button gajis OFF TIMER button button OPERATION SELECT button HR button MIN button ECONO COOL button TIME SET button CLOCK SET button VANE CONTROL button 3 SPECIFICATION Indoor model MSC GA20VB MSC GA25VB MSC GA35VB Function Heating Single phase Single phase Single phase TOO Un 230V 50Hz 230V 50Hz 230V 50Hz apacity Air flow High MedX Low 474 372 276 510 420 342 474 384 306 588 456 342 582 444 324 606 498 396 A _ Poweroulet A S 5 RC4V19 HA 5 o Winding WHT BLK 283 WHT BLK 283 WHT BLK 224 L lresistance at 20 C EM BLK RED 188 BLK RED 188 BLK RED 318 Weght 1551 9 1 9 10 Air direction Sound level High Med Low dB 36 31 25 36 31 25 36 31 25 39 323 25 40 33 26 39 33 26 900 750 600 950 820 700 900 770 650 1 050 870 700 930 760 600 95 2 9 Remote controller model KP1A or KMO4F NOTE 1 Test conditions are based on ISO 5151 Cooling Indoor DB27 C WB19 C Heating Indoor DB20 C Outdoor DB35 C WB24 C Outdoor DB7 C WB6 C Indoor Outdoor piping length 5m Reference value 4 NOISE CRITERIA CURVES MSC G
21. fer to 2 3 Remove the V A clamp Refer to 2 2 a Screw of the 4 Remove the cord clamp Refer to 2 xL a RN electrical box 5 Remove the terminal block Refer to 2 IW 6 Remove the screw of earth wire Refer to 2 7 Disconnect the connector of the indoor coil thermistor CN112 the fan motor connector CN211 and CN121 and the vane motor connector CN151 on the electronic con trol P C board 8 Remove the fan motor lead wire and indoor coil thermistor from the electrical box 9 Remove the lead wire of vane motor from the bottom of electrical box 10 Remove the screw fixing the electrical box remove the electrical box Fan motor connector Removing the nozzle assembly and the vane motor Photo 4 1 Remove the front panel Refer to 1 2 Remove the electrical box Refer to 3 3 Pull out the drain hose from the nozzle assembly remove the nozzle assembly 4 Remove the screws of the vane motor disconnect the vane motor connector b Remove the vane motor Screws of the vane motor Drain hose Removing the indoor fan motor and the line flow fan photo 5 1 Remove the front panel Refer to 1 2 Remove the electrical box Refer to 3 3 Pull out the drain hose from the nozzle assembly remove the nozzle assembly Refer to 4 4 Remove the screw of the lead cover and lead cover 5 Release the hooks to open the motor band slightly 6 Loosen the hexagon socket
22. it control system Replace the indoor electronic control P C board Indoor unit operates when the EMERGENCY OPERATION switch is pressed Refer to 9 5 Check of remote controller and receiver P C board OPERATION INDICATOR lamp on the indoor unit is flashing on and off Indoor unit doesn t receive the signal from remote controller Indoor unit doesn t operate when the EMERGENCY OPERATION switch is pressed 1 Check indoor outdoor connecting wire 2 Refer to 9 5 Check of indoor electronic control P C board MXZ type 5 time flash Outdoor unit Trouble of thermistor in outdoor unit Outdoor unit Outdoor power system abnormality outdoor control system Refer to Check of inverter compressor and Check of power supply MUH GA20 GA25 GA35VB MXZ A14 A18 A26 A32WV Refer to Check of outdoor thermistor and others deicer P C board 7 time flash MUH GA20 GA25 GA35VB MXZ A14 A18 A26 A32WV Replace the and others Indoor unit operates But indoor unit doesn t blow out cool air MUX 2A28 2A59 3A60 3A63 2A70 4A73VB Refer to Check of indoor outdoor units connection and outdoor unit 10 time flash Cause Outdoor unit Trouble of refrigerant system abnormality MXZ type Refer to outdoor refrigerant system related 9 3 Troubleshooting check table The following indication does
23. lace the batteries Refer to 9 1 4 not clear Yes Remove batteries then set them back and press the RESET button Check if the unit operates with the remote controller No Turn ON a radio to AM and press switch Does the unit operate with the remote controller on the remote controller Yes No Is noise heard from radio Replace the remote controller Yes Are there any fluorescent lights of inverter or rapid start type within the range of 1m Reinstall the unit away from lights Attach a filter on receiving part Measure the voltage between receiver P C board connector CN302 No 3 and No 5 when the remote controller button is pressed 2 Replace the indoor electronic control Is the voltage approx 4V 0 rd No 5V or OV DC Replace the power monitor receiver P C board The unit doesn t operate with the remote controller Also the OPERATION INDICATOR lamp doesn t light up by pressing the EMERGENCY OPERATION switch Check of indoor electronic control P C board Check the both parts side and pattern side of indoor electronic control P C board visually Turn OFF the power supply Remove indoor fan motor connector CN211 and vane motor connector CN151 from the indoor electronic control P C board and turn ON the power supply Does the unit operate with the remote controller Does the OPERATION INDICATOR lamp light up by pressing the EMERGE
24. m Insulation 937 O D V Insulation 28 Power supply cord Lead to right 1 0m Lead to eft 0 3m Wireless remote controller 62 1 MSC GA35VB 161 5 161 5 LO E Installation plate un gt 783 Indoor unit LO N 326 815 I Wall hole 465 Installation plate Liquid line 6 35 0 5m Gas line 9 52 0 43m Insulation 937 O D 21 1 0 Drain hose 16 Connected part O D Insulation 28 Power supply cord Lead to right 1 0m y i Lead to left 0 3m Wireless remote controller 6 WIRING DIAGRAM MSC GA20VB MSC GA25VB MSC GA35VB TO OUTDOOR UNIT CONNECTING BRN oe O e aR CN 3 RED TS Tie SNC eue RT MXZ A TYPE E lae BLK m 12V BLU E A NR11 CN 3 GRY 5 FOR CN202 96 H 3 MU OR S WHT gt te lom 2 WHT 4 n Hi F11 5814141 13 WHT 5 12V 1 BLK rs RED lt 5 6 POWER LD103 75 T0 25 a SUPPLY ELECTRONIC CONTROL P C BOARD CORD N 230V 5 X342 5 77 wv POWER MONITOR EM DH RECEIVER P C BOARD CIT RPE CIRCUIT BREAKER 5 REMOTE CONTRO
25. n motor repeats 12 sec onds ON and 3 minutes OFF When the indoor fan motor breaks the fan keeps stopping 3 time flash Indoor fan 4 motor j j When rotational frequency feedback pulse signal is not emit during 12 second indoor fan L operation 2 5 second OFF 4 time flash Indoor control system MXZ type Outdoor power system MUH or MXZ type Defrost thermistor MUH or MXZ type Outdoor control system error MXZ type Outdoor refrigerant system error MXZ type Operation mode 2 5 second OFF Outdoor unit does not operate Outdoor unit does not run Outdoor unit does not run Outdoor unit does not run Outdoor unit does not run Outdoor unit operates but indoor unit When it cannot properly read data in the nonvolatile memory of indoor electronic control P C board When the compressor operation is continuously three times interrupted by over current protection within 1 minute after start up it stops operation When the defrost thermistor shorts or opens after the compressor start up When it cannot properly read data in the non volatile memory of outdoor electronic control P C board When the compressor operation has been in terrupted by LEV protection continuously 5 minutes the compressor stops operation When the operation mode of each indoor unit is differently set to COOL includes DRY and HEAT at same time
26. nstruction of troubleshooting Serial signal error is indicated 9 0 5 sec 0 5 sec OFF Yes Is this mis wiring poor contact or disconnection of wire Make them sure ad 1 Turn OFF the power supply indoor outdoor unit and disconnect indoor and outdoor connecting wire on indoor side 2 Short circuit between indoor terminal block IN and 3 Turn ON the power supply indoor unit and press once EMERGENCY OPERATION switch Replace the indoor electronic control P C board Is there 20V DC between both ends of R132 on indoor electronic control P C board By tester the stylus is between 0 20V Turn OFF the power supply indoor unit ON indoor and outdoor connecting wire Turn ON the power supply outdoor unit Check the outdoor power supply Is there 230V AC between outdoor terminal block O N TB1 power supply cord and connection Replace the deicer P C board During EMERGENCY OPERATION is there 10V DC between both ends Make the wiring between CN730 of R601 on the deicer P C board and outdoor terminal block correct By tester the stylus is between 5 10V _ 9 6 Test point diagram and voltage MSC GA20VB MSC GA25VB MSC GA35VB Indoor electronic control P C board Power supply input Fuse F11 250V AC 3 15A 230 AC Indoor fan motor 230V AC Safety device of fan by horizontal vane CN1R1
27. on settings are memorized when 10 seconds have passed after the remote controller was operated elf main power is cut while AUTO START STOP timer is active the timer setting is cancelled f the unit has been off with the remote controller before power failure the auto restart function does not work as the power button of the remote controller is off prevent breaker off due to the rush of starting current systematize other home appliance not to turn ON at the same time When some air conditioners are connected to the same supply system if they are operated before power failure the Starting current of all the compressors may flow simultaneously at restart Therefore the special counter measures are required to prevent the main voltage drop or the rush of the starting current by adding system that allows the units to start one by one 9 TROUBLESHOOTING MSC GA20VB MSC GA25VB MSC GA35VB 9 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 power supply before removing the front panel the cabinet the top panel and th
28. on the terminal block the unit does not operate normally 2 AUTO RESTART FUNCTION elf a ground is incorrect it may cause an electric shock When the indoor unit is controlled with the remote controller the operation mode set temperature and the fan speed are memorized by the indoor electronic control P C board The AUTO RESTART FUNCTION sets to work the moment power has restored after power failure Then the unit will restart automatically However if the unit is operated 4 FEEL CONTROL mode before power failure the operation is not memorized In FEEL CONTROL mode the opera tion is decided by the initial room temperature AUTO RESTART FUNCTION is ON when the units are shipped from the factory Outdoor unit Outdoor unit MU amp MUX type MUH amp MXZ type Set switch upside Set switch downside Operation 1 If the main power 230V AC has been cut the operation settings remain 2 After the power is restored the unit restarts automatically according to the memory However it takes at least 3 minutes for the compressor to start running How to release AUTO RESTART FUNCTION 1 Turn OFF the main power for the unit 2 Pull out the electronic control P C board and change switch SW2 on the indoor electronic control P C board as following figures AUTO RESTART AUTO RESTART FUNCTION ON FUNCTION OFF Set O switch downside Set switch upside iO ZONO NOTE operati
29. set screw from the line flow fan 7 Remove the screws fixing the motor bed remove the fan motor with motor band and the motor bed 8 Remove the screws fixing the left side of the heat exchanger 9 Lift the left side of the heat exchanger Photo 7 10 Remove the line flow fan Screws of the left side of the heat exchanger Photo 6 Hexagon socket set screw Screw of SN mS b Em the lead F to Screws of COVEI amt Hooks of the T the motor bed motor band 11 PARTS LIST non RoHS compliant MSC GA20VB MSC GA25VB MSC GA35VB 11 1 INDOOR UNIT STRUCTURAL PARTS 11 2 ACCESSORY AND REMOTE CONTROLLER 1 10 Optional parts See 13 These figures show about MSC GA35VB 11 1 INDOOR UNIT STRUCTURAL PARTS Symbol Q ty unit Part Name in Wiring aui P Diagram E E02 764 234 BOX 1 Including 34 5 3 02 763 067 SCREWCAP 2 2 2 POSSET _ 4 E02 959 010 FRONTPANEL 1 1 1 5 02 408 M2 CAICH O 2 2 2 E02 763 100 CATECHINAIRFILTER 2 2 6 Ema 764 100 CATECHIN AIR FILTER cst 7 E02 763 975 CORNERBOX RIGHT 1 1 1 802 aw 9 iNsTaLLamION PLATE 1 E02 751 970 INSTALLATION PLATE 41 11 2 ACCESSORY AND REMOTE CONTROLLER 9 02 749 426
30. ulti system air conditioner Outdoor unit MXZ A14WV MXZ A18WV MXZ A26WV MXZ A32WV can connect two or more indoor units with one outdoor unit According to the capacity two or more units can operate simultaneously When you try to operate two or more indoor units with one outdoor unit simultaneously one for the cooling and the other for heating the operation mode of the indoor unit that operates earlier is selected The other indoor units that will start the operation later cannot operate indicating as shown in the figure below In this case please set all the indoor units to the same operation mode Operation Indicator lighted E FE LE flashing When indoor units starts the operation while the defrosting of outdoor unit is being done it takes few minutes max 10 minutes to blow out the warm air the heating operation though indoor unit that does not operate may get warm or the sound of refrigerant flowing may be heard they are not malfunction The reason is that the refrigerant continuously flows into it 11 _ O 9 2 Instruction of troubleshooting MSC GA20VB MSC GA25VB MSC GA35VB Start Indoor unit operates Outdoor unit doesn t operate Outdoor unit operates only in Test Run operation 2 Check room temperature thermistor Refer to 9 6 Test point diagram and voltage MUH GA20 GA25 GA35VB MXZ A14 A18 A26 A32WV Flash on and off at 0 5 second intervals Cause
Download Pdf Manuals
Related Search