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SERVICE MANUAL - Mitsubishi Electric Cooling & Heating

Contents

1. 5 VDC Nu e Oiyza ves 252 o Indoor coil thermis 9 Pt T gt o F RT12 MAIN 0 00 845 9 9 ai DMOON209 DM00N246 RT13 SUB wi o o ennd Horizontal motor 151 Room temperature thermistor RT11 short mode point JPG JPS Refer to 7 1 Vertical vane motor CN152 Receiver P C board Indoor coil thermistor RT12 MAIN RT13 SUB Room temperature thermistor RT11 SW board Resistance 32 50 68 86 104 122 140 Temperature F 24 9 DISASSEMBLY INSTRUCTIONS lt Terminal with locking mechanism Detaching points The terminal which has the locking mechanism can be detached as shown below There are two types refer to 1 and 2 of the terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out Check the shape of the terminal before detaching 1 Slide the sleeve and check if there is a locking lever or not 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 9 1 MSZ A09NA MSZ A12NA
2. Emergency operation switch Remote control receiving section MSZ A24NA MSY A24NA MSZ GA24NA MSY GA24NA Operation indicator lamp Emergency operation switch Remote control receiving section M ACCESSORIES MSZ A09 12 15 17NA MSZ A09 12 15 17NA 1 MSZ A24NA MSY A24NA MSY A15 17NA MSY A15 17NA 1 MSZ GA24NA MSY GA24NA Installation plate 1 1 Installation plate fixing screw 4 x 25 mm Remote controller holder Fixing screw for 3 5 x 1 6 mm Black Battery AAA for remote controller Wireless remote controller Felt tape Used for left or left rear piping Conduit plate SPECIFICATION Indoor unit model MSZ A09NA MSZ A12NA External finish White Power supply V phase Hz 208 230 1 60 Max fuse size time delay Disconnect switch 15 Min circuit ampacity 1 0 Fan motor 0 76 COOL Dry Wet HEAT Airflow Low Med High Powerful 152 229 307 338 134 205 275 303 152 240 353 388 134 215 318 349 159 222 307 321 159 240 353 353 Moisture removal 2 3 3 2 COOL HEAT Sound level Low Med High Powerful 22 33 38 41 22 34 42 44 22 33 38 39 22 34 42 42 Cond drain connection O D 5 8 w Dimensions D H 30 11 16 8
3. 0 0 00 0 00 0000 000 0 0 00 0 0000Q0 RoHS 40 281 MSZ A24NA MSY A24NA MSZ GA24NA MSY GA24NA 9 ACCESSORY AND REMOTE CONTROLLER Q ty unit Symbol 2 E Part No in Wiring MSZ 42 28 Remarks Diagram GA24 NA 0 E12 A58 426 06 12 53 426 06 E12 C26 426 REMOTE CONTROLLER KM07K E12 C29 426 KM07M E12 527 083 REMOTE CONTROLLER HOLDER RoHS 10 AIR CLEANING FILTER ANTI ALLERGY ENZYME FILTER e AIR CLEANING FILTER removes fine dust of 0 01 micron from air by means of static electricity e Normal life of AIR CLEANING FILTER is 1 year If AIR CLEANING FILTER is to be washed soak AIR CLEANING FILTER in water when showing dirt in lukewarm water and rinse it delicately without removing the filter from the frame about once every 3 months e Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet e Do not remove or attach AIR CLEANING FILTER during unit operation Model Part No MSZ A24NA MSY A24NA MSZ GA24NA MSY GA24NA MAC 2300FT Air cleaning filt r Anti allergy enzyme filter blue bellows type 41 11 MICROPROCESSOR CONTROL MSZ A09NA MSZ A12NA MSZ A15NA MSZ A17NA MSZ A24NA MSY A15NA MSY A17NA MSY A24NA MSZ GA2
4. KMO7J F C MSZ A24NA KM06B F MSZ A24NA 1 KMO7K FPC MSY A15 17NA 06 F MSY A15 17NA KMO7L F C MSY A24NA KM06D F MSY A24NA 1 KM07M F C Timer indication has been changed indication 2 Conduit plate has been removed MSZ A09 12 15 17 MSY A15 17 3 Conduit cover terminal block cover and terminal block holder have been changed MSZ A09 12 15 17 MSY A15 17 57 24 gt gt MSZ GA24NA 5 2 gt gt MSY GA24NA 1 Indoor electronic control P C board has been changed 2 PART NAMES AND FUNCTIONS MSZ A09NA MSY A15NA MSZ A24NA MSY A24NA MSZ A12NA MSY A17NA MSZ GA24NA MSY GA24NA MSZ A15NA MSZ A17NA Front panel Air inlet Heat exchanger Panel Air cleaning filter Anti Allergy Enzyme Filter Blue bellows Catechin air filter Air outlet Vertical vane 090 Remote controller Horizontal vane Line flow fan 6 MSZ A09NA Operation section Display section MSZ A12NA When the front panel is opened MSZ A15NA MSZ A17NA Operation indicator LO INDICATOR MSY A15NA lamp MSY A17NA
5. Indoor coil thermistor RT13 sub l Room temperature thermistor RT11 Flared connection Refrigerant pipe 01 4 with heat insulator MSZ A24NA MSY A24NA MSZ GA24NA MSY GA24NA Refrigerant pipe 25 8 Il with heat insulator Flared connection Indoor coil Indoor thermistor heat RT12 main exchanger cr Indoor coil thermistor RT13 sub Distributor Flared connection Room temperature thermistor RT11 Refrigerant pipe 21 4 with heat insulator 6 REFRIGERANT SYSTEM DIAGRAM MSZ A15NA MSY A15NA Unit inch MSZ A17NA MSY A17NA Refrigerant pipe 21 2 with heat insulator Flared connection Indoor coil Indoor thermistor heat RT12 main exchanger Distributor cr Indoor coil thermistor i RT13 sub Room temperature thermistor RT11 Flared connection Refrigerant pipe 01 4 with heat insulator Refrigerant flow in cooling price gt Refrigerant flow in heating 7 SERVICE FUNCTIONS MSZ A09NA MSZ A12NA MSZ A15NA MSZ A17NA MSZ A24NA MSY A15NA MSY A17NA MSY A24NA MSZ GA24NA MSY GA24NA 7 1 TIMER SHORT MODE For service set time can be shortened by short circuit of JPG and JPS on the indoor electronic control P C board The time will be shortened as follows Refer to 8 7 Set time 1 minute 1 second Set time 3 minute 3 second It takes 3 minutes for the compressor to start operation However the st
6. Photo 4 holder o Screw of the electrical cover Power monitor receiver P C board holder Ground wire Indoor fan motor connector CN211 Indoor coil thermistor GN po CN112 Vane motor connector CN151 OPERATING PROCEDURE PHOTOS 4 Removing the horizontal vane motor unit Photo 7 1 Remove the horizontal vane the panel refer to 1 and the corner box 2 Remove the screws of the horizontal vane motor unit and pull out the horizontal vane motor unit Photo 7 ews of the 9 Disconnect the connector from the horizontal vane motor horizontal vang unit motor unit 5 Removing the indoor fan motor and the line flow fan Photo 8 1 Remove the horizontal vane the panel refer to 1 and the corner box 2 Remove the switch holder and the electrical box Refer to 3 3 Remove the drain hose from the nozzle assembly and remove the nozzle assembly 4 Remove the screws fixing the motor bed Photo 8 5 Loosen the screw fixing the line flow fan Photo 9 6 Remove the motor bed together with fan motor and motor band 7 Release the hooks of the motor band and remove the motor band then pull out the indoor fan motor 8 Remove the screws fixing the left side of the heat exchang Screws of er Photo 10 the motor 3 9 Lift the heat exchanger and pull out the line flow fan to the bed lower left Photo 9 Screw of the line flow fan Photo 10 Screws of the
7. Y Is the resistance 1 MO Replace indoor electronic control P C board or more No and the indoor fan motor Yes Replace indoor electronic control P C board Measure the resistance of resis 2 7 gt tor R111 on the indoor electronic Is the resistance approx Replace the indoor electronic control P C control P C board 4 0 board and the indoor motor Yes ace the indoor electronic control P C board Indoor electronic control P C Board Co Varistor NR11 T Fuse F11 Lk CN211 20 How to check miswiring and serial signal error Tum OFF the power supply Is there rated voltage the power supply No Y Yes Turn ON the power supply Is there rated voltage between outdoor terminal block 51 and No 52 yes Press EMERGENCY OPERATION switch once Y Does the left lamp of OPERATION INDICA TOR lamp light up lt Confirmation of the power to the indoor unit gt Yes Y lt serial signal error indicated 6 minutes later Yes lt Check the power supply gt Check the wiring No Is there any miswiring poor contact or wire disconnec No tion of the indoor outdoor connecting wire Yes Correct them No Y A Y Turn OFF the power supply Check once more if the indoor outdoor connecting wire is not miswiring Sho
8. outdoor thermistors short open circuit thermistor thermistors 40940 0908080000080 during the compressor operation Refer to outdoor unit service 2 5 second OFF manual Left lamp flashes 7 time flash Replace the inverter P C board Outdoor T us It cannot properly read data in the nonvolatile or the outdoor electronic con oooooe memory of the inverter P C board or the out trol P C board control eosoceosoceoesos tem L door electronic control P C board Refer to outdoor unit service 2 5 second OFF manual Left lamp flashes 14 time flash Check the stop valve Otherab eos An abnormality other than above mentioned Confirm the abnormality in normality osos o is detected detail using the failure mode SSS recall function for outdoor unit 2 5 second OFF Outdoor control system Outdoor unit It cannot properly read data in the nonvolatile MSZ A09 12 Left lamp lights up does not oper memory of the inverter P C board or the out 115 17 ate door electronic control P C board MSY A15 17 Check the blinking pattern of the LED on the inverter P C board or the outdoor electronic control P C board 16 2 4 OPERATION INDICATOR Operation indicator lamp Symptom Condition Correspondence Left lamp lights and lower lamp flashes MXZ type Outdoor unit The operation mode of the each indoor unit S00000 8000008 is d
9. lukewarm water and rinse it delicately without removing the filter from the frame about once every 3 months e Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet e Do not remove or attach AIR CLEANING FILTER during unit operation Model Part No MSZ A24NA MAC 2300FT MSY A24NA Air cleaning filt r Anti allergy enzyme filter blue bellows type 35 E 10 2 RoHS PARTS LIST RoHS compliant MSZ A09NA MSZ A12NA MSY A15NA MSY A17NA MSZ A15NA MSZ A17NA 1 INDOOR UNIT STRUCTURAL PARTS 2 ACCESSORY AND REMOTE CONTROLLER 12 1 INDOOR UNIT STRUCTURAL PARTS Q tylunit Symbol MSZ A Part No Part name in Wiring 12NA 15NA 17NA Remarks Diagram 0 0 E12 A32 234 1 1 Including E12 A49 000 PANEL ASSEMBLY No 3 4 E12 913 067 SCREW CAP 2 PC SET E12 915 010 PANEL CATECHIN AIR FILTER E12 915 100 LEFT CATECHIN AIR FILTER RIGHT AIR CLEANING FILTER MAC 415FT E CORNER BOX RIGHT z 9 E12 916 100 E12 A32 975 E12 913 970 INSTALLATION PLATE E12 A49 978 CONDUIT PLATE Or RoHS gt e E12 A54 426 E12 49 426 IREMOTE E12 C30 426 CONTROLLER E12 C22 426 REMOTE E12 527 0
10. 4 SWING MODE By selecting SWING mode with WIDE VANE button the vertical vane swings horizontally remote controller displays 46 5 WIDE MODE z By selecting WIDE mode with WIDE VANE button indoor fan speed becomes faster than setting fan speed on the remote controller The remote controller displays NOTE The position of vane angle 3 angle 4 and angle 5 are different in COOL operation and HEAT operation Indoor fan speed becomes faster than setting fan speed on the remote controller even when X or gR is selected 11 8 TIMER OPERATION 1 How to set the time 1 Press OPERATE STOP ON OFF button to start the air conditioner 2 Check that the current time is set correctly NOTE Timer operation will not work without setting the current time Initially 0 00 blinks at the current time display of TIME MONITOR so set the current time correctly with CLOCK SET button How to set the current time 1 Press the CLOCK set button 2 Press the TIME SET buttons gt lt to set the current time Each time FORWARD button is press the set time increases by 1 minute and each time BACKWARD button 4 is press the set time decreases by 1 minute Pressing those buttons longer increases decreases the set time by 10 minutes Press the CLOCK set button ON timer setting 1 Press ON TIMER button CUN during operat
11. INDOOR HEAT EXCHANGER 1 1 1 1 1 1 12 12527 666 UNION GAS 1 1 1 1 1 1 95 8 13 12151 667 UNION LIQUID 1 1 1 1 1 1 01 4 39 o MSZ A24NA MSY A24NA MSZ GA24NA MSY GA24NA 8 INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 1 Part numbers that are circled are not shown in the illustration Q ty unit MSZ MSY Part No Part Name in Wiring Remarks Diagram A24NA A24NA z 9 gt gt E12 527 302 _ LINE FLOW 12 408 509 BEARING MOUNT E12 001 504 SLEEVE BEARING E12 408 702 DRAIN HOSE E12 A58 235 NOZZLE E12 685 040 VANE UPPER E12 685 041 VANE LOWER E12 527 034 VANE CRANK SET ILI i E12 448 303 VANE MOTOR VERTICAL E12 408 303 VANE MOTOR HORIZONTAL E12 918 333 MOTOR BAND E12 918 329 DISPLAY P C BOARD E12 918 468 RECEIVER P C BOARD E12 A58 452 E12 A53 452 ELECTRONIC CONTROL E12 E34 452 BOARD 2 E12 E35 452 E12 58 375 TERMINAL BLOCK 12 918 307 INDOOR COIL THERMISTOR RT12 RT13 E12 528 034 VANE MOTOR SUPPORT SET RIGHT E12 529 034 VANE MOTOR SUPPORT SET LEFT 3X1 Including FAN MOTOR RUBBER MOUNT X2 Including SW P C BOARD D or OO RC0J56 RIGHT amp LEFT UP amp DOWN 55 5 55 5 55 55 55 55 gt 55 5 5 RT11
12. Tum 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 Measure the resistance between E S CN211 and of the indoor fan motor Short open circuit connector Replace the indoor fan motor Does the unit operate with the remote controller Does OPERATION INDICATOR lamp light up by pressing EMERGENCY Yes OPERATION switch No Measure the resistance of the horizon Short open circuit __ tal vane motor coil Replace the horizontal vane motor and the Refer to 8 5 indoor electronic control P C board Replace the indoor electronic control P C board Yes Are the varistor NR11 Y burnt and the fuse F11 blown No Turn OFF the power supply Check both parts side and pattern Be sure to check both the fuse side of the indoor electronic control and the varistor in any case P C board visually Is the fuse F11 blown only No Yes 3X1 The fan motor connector s 1 lead wire is red whereas is Measure the resistance between black and of the indoor fan motor connector to CN211 on the indoor 3X2 Connect of the tester to fan motor connector s lead Se e wire and to lead wire otherwise the resistance electronic control P C board X1 2 not be measured properly
13. disappears the memorized failure details can be recalled 1 Flow chart of failure mode recall function for the indoor outdoor unit those figures show about MSZ A09 12 15 17 Operational procedure The cause of abnormality cannot be found because the abnormality does not recur Setting up the failure mode recall function Y Turn ON the power supply Preparation of the remote controller While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button First release RESET button And release the other two buttons after all LCD in operation display section of the remote controller is displayed after 3 seconds Y CIT Een Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 3X1 3X1 Regardless of normal or abnormal condition a short eep is emitted once the signal is received Y is emitted once the signal is received Does the left lamp of OPERATION INDICATOR lamp on the Indoor unit is normal indoor unit blink at the interval of 0 5 seconds But the outdoor unit might be abnormal because there are some abnor Blinks Either indoor or outdoor unit is abnormal Beep is emit No malities that cannot be recalled with this way ted at the same timing as the blinking of the left lamp OFF Confirm if outdoor unit is a
14. DRY 4 OPERATION 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select DRY mode with OPERATION SELECT button 3 The set temperature is determined from the initial room temperature 1 Coil frost prevention Coil frost prevention is as same as COOL mode 11 1 1 2 Low outside temperature operation Low outside temperature operation is as same as COOL mode 11 1 2 11 3 HEAT 3 OPERATION MSZ 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select HEAT mode with OPERATION SELECT button 3 Press TEMPERATURE buttons TOO WARM or TOO COOL button to select the desired temperature The setting range is 61 88 F 1 Cold air prevention control When the compressor is not operating or is starting and the temperature of indoor heat exchanger and or the room tem perature is low or when defrosting is being done the indoor fan will stop or rotate in Very Low speed 2 High pressure protection In HEAT operation the compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the condensing pressure from increasing excessively 3 Defrosting Defrosting starts when the temperature of outdoor heat exchanger becomes too low The indoor outdoor fans stop the 4 way valve reverses and the compressor starts This mode continues until the temperature of outdoor heat
15. FLOW FAN X1 Including SW P C BOARD and POWER MONITOR RECEIVER P C BOARD X2 Including FAN MOTOR RUBBER MOUNT 2 PC SET 37 P I MSZ A09NA MSZ A12NA MSZ A15NA MSZ A17NA MSY A15NA MSY A17NA 4 INDOOR UNIT HEAT EXCHANGER ZZ BAM gt SS Q ty unit Symbol MSZ A a Part No Part name in Wiring Remarks Diagram 12NA 15NA 17NA 12 54 620 INDOOR HEAT 12 56 620 12 815 666 12 155 666 UNION GAS E12 151 667 UNION LIQUID 5 AIR CLEANING FILTER ANTI ALLERGY ENZYME FILTER e AIR CLEANING FILTER removes fine dust of 0 01 micron from air by means of static electricity e Normal life of AIR CLEANING FILTER is 1 year If AIR CLEANING FILTER is to be washed soak AIR CLEANING FILTER in water when showing dirt in lukewarm water and rinse it delicately without removing the filter from the frame about once every 3 months e Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet e Do not remove or attach AIR CLEANING FILTER during unit operation Model Part No MSZ A09 12 15 17NA MSY A15 17NA MAC 415FT E Replacement of the air cleaning filter 1 Remove the catechin air filter left one 2 Remove
16. MSZ type MSY type cee coo a se l Lighted STOR OO Not lighted 11 10 Changing temperature indication F C MSZ A NA 1 MSY A NA 1 MSZ GA MSY GA The preset unit is F Press RESET button while the temperature buttons are pressed Press RESET button gently using a thin stick s MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2006 MITSUBISHI ELECTRIC CO LTD Distributed in Mar 2009 No OB450 REVISED EDITION D 4 Distributed in Jun 2008 No OB450 REVISED EDITION C 6 Distributed in May 2007 No OB450 REVISED EDITION B 7 Distributed in Dec 2006 No OB450 REVISED EDITION A 7 Distributed 2006 450 7 New publication effective 2009 Made in Japan Specifications subject to change without notice
17. SLEEVE BEARING E02 408 702 DRAIN HOSE E02 A58 235 NOZZLE E02 685 040 VANE UPPER E02 685 041 VANE LOWER E02 527 034 VANE CRANK SET NA 02 58 300 INDOOR FAN MOTOR ASSEMBLY 1 RC0J56 E02 448 303 VANE MOTOR VERTICAL RIGHT amp LEFT E02 408 303 VANE MOTOR HORIZONTAL UP amp DOWN E02 918 333 MOTOR BAND E02 918 329 DISPLAY P C BOARD E02 918 468 RECEIVER P C BOARD gt 55 ee 02 58 452 02 53 452 ELECTRONIC CONTROL P C BOARD 2 E02 527 308 ROOM TEMPERATURE THERMISTOR E02 A58 375 TERMINAL BLOCK E02 918 307 INDOOR COIL THERMISTOR E02 528 034 VANE MOTOR SUPPORT SET RIGHT E02 529 034 VANE MOTOR SUPPORT SET LEFT 1 Including FAN MOTOR RUBBER MOUNT 2 Including SW P C BOARD 9 ACCESSORY AND REMOTE CONTROLLER h Io o E02 A58 426 1 06 21 02 453426 REMOTE CONTROLLER 1 KM06D 22 02 527 083 CONTROLLER HOLDER 1 1 34 2222 40 10 AIR CLEANING FILTER ANTI ALLERGY ENZYME FILTER e AIR CLEANING FILTER removes fine dust of 0 01 micron from air by means of static electricity e Normal life of AIR CLEANING FILTER is 1 year If AIR CLEANING FILTER is to be washed soak AIR CLEANING FILTER in water when showing dirt
18. TOO COOL buttons when you feel too cool or too warm Each time the TOO WARM or TOO COOL button is pressed the indoor unit receives the signal and emits a beep tone Fuzzy control When the TOO COOL or TOO WARM button is pressed the microprocessor changes the set temperature considering the room temperature the frequency of pressing TOO COOL or TOO WARM button and the user s preference to heat or cool So this is called Fuzzy control and works only in FEEL CONTROL mode In DRY mode of I FEEL CONTROL the set temperature does not change TOO COOL raise the set temperature 2 4 F TOO WARM lower the set temperature 2 4 F 11 6 AUTO CHANGE OVER AUTO MODE OPERATION MSZ Once desired temperature is set unit operation is switched automatically between COOL and HEAT operation Mode selection 1 Initial mode When unit starts the operation with AUTO operation from OFF f the room temperature is higher than the set temperature operation starts in COOL mode If the room temperature is equal to or lower than the set temperature operation starts in HEAT mode 2 Mode change COOL mode changes to HEAT mode when about 15 minutes have passed with the room temperature 2 4 F below the set temperature HEAT mode changes to COOL mode when about 15 minutes have passed with the room temperature 2 4 F above the set temperature NOTE If two or more indoor units are operating in multi system
19. circuit is detected every 8 seconds during operation Refer to the characteristics of the main indoor coil ther mistor the sub indoor coil thermistor 8 7 3 time flash 2 5 second OFF Serial signal The serial signal from outdoor unit is not re ceived for a maximum of 6 minutes signal error Refer to 8 6 How to check miswiring and serial 11 time flash 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not emitted during the 12 seconds the indoor fan operation Refer to 8 6 Check of indoor fan motor 12 time flash 2 5 second OFF Indoor control system It cannot properly read data in the nonvolatile memory of the indoor electronic control P C board Replace the indoor electronic control P C board NOTE Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE 8 4 14 1 8 3 INSTRUCTION OF TROUBLESHOOTING Indoor unit oper ates Outdoor unit does not operate C Indoor unit does not receive the signal from re mote controller OPERATION INDICATOR lamp on the indoor unit is flashing ON and OFF Indoor unit operates Outdoor unit does not operate normally If blinking of OPERATION INDI CATOR lamp cannot be checked it can be checked with failure mode recall function Outdoor unit Outdoor unit Un
20. compliant RoHS compliant products have G mark on the spec name plate For servicing of RoHS compliant products refer to the PARTS Revision PARTS LIST has been revised 10 1 8 10 2 8 Revision B MSZ A NA 1 and MSY A NA 1 Remote controller has been changed Revision C SPECIFICATION has been corrected Powerful has been added Airflow Sound level Revision D MSZ GA NA MSY GA NA have been added MSZ09UN MSZ A09NA MSZ12UN MSZ A12NA MSH15TN MSZ A15NA MSH17TN MSZ A17NA 2 Indoor fan motor has been changed 1 TECHNICAL CHANGES MSH24WN MSZ A24NA MS15TN MSY A15NA MS17TN MSY A17NA MS24WN MSY A24NA 1 Control method between indoor and outdoor has been changed 3 Signal of remote controller has been changed It is not available for conventional models MSZ A09NA MSZ A09NA MSZ A12NA MSZ A12NA MSZ A15NA MSZ A15NA A A A A MSZ A17NA MSZ A17NA 1 Remote controller has been changed MSZ A24NA MSZ A24NA MSY A15NA MSY A15NA MSY A17NA MSY A17NA MSY A24NA MSY A24NA EN Temperature indication function F C has been added Refer to 11 10 Models Remote controller Temperature indication MSZ A09 12 15 17NA KMO6A F MSZ A09 12 15 17NA
21. left side of the heat exchanger __ s 9 2 MSZ A24NA MSY A24NA MSZ GA24NA MSY GA24NA OPERATING PROCEDURE PHOTOS 1 Removing the front panel Photo 1 1 Remove the screw caps of the front panel Remove the Front panel screws 2 Pull the panel down to your side slightly and unhook the catches at the top 2 Removing the electronic control P C board the receiver P C board and the display P C board 1 Remove the front panel Refer to 1 2 Remove the corner box Sa Indoor 3 Remove the screw of the electrical cover E electronic Remove the electrical cover and T B SW cover 47 control 4 Remove the screw of the ground wire which is solder p EC P C board mounted to the electronic control P C board 5 Remove the R L holder 6 Remove the screw of the conduit cover 7 Remove the conduit cover 8 While pulling the electronic control P C board forward little by little disconnect all the connectors from the board T B SW cover Screw of 9 Remove the electronic control P C board T B SW cover 10 Open the R L holder remove the receiver P C board and the display board 1 Screw of the 1 electrical cover Receiver R L Screw Gf P C board holder conduit cover Removing the electrical box Screw of the 1 Remove the front panel Refer to 1 ground wire 2 Remove the electrical cover Refer to 2 3 Disconnect the connector of the indoor coil the
22. or Angle 1 Vane angle is fixed to Angle 4 Upward P d 5 STOP operation OFF and ON TIMER standby In the following cases the horizontal vane returns to the closed position When OPERATE STOP ON OFF button is pressed POWER OFF b When the operation is stopped by the emergency operation c When ON TIMER is ON standby 6 Dew prevention During COOL or DRY operation with the vane angle at Angle 2 4 A09 17 Angle 3 5 A24 Angle 4 5 GA24 when the compressor cumulative operation time exceeds 1 hour the vane angle automatically changes to Angle 1 for dew prevention 7 SWING MODE 5j By selecting SWING mode with VANE CONTROL button the horizontal vane swings vertically The remote controller displays 8 Cold air prevention in HEAT operation MSZ The horizontal vane position is set to Upward NOTE When 2 or more indoor units are operated with multi outdoor unit even if any indoor unit turns thermostat OFF this control does not work in the indoor unit 45 w w w 9 To change the airflow direction not to blow directly onto your body MSZ A09 12 15 17 MSY A15 17 To change the airflow direction When to use this function COOL DRY HEAT For MSZ Pressing and holding VANE CONTROL button for 2 seconds or more the horizontal vane reverses and moves horizontal position Horizontal position Use this function if you do not want the air from the indoo
23. the air cleaning filter Blue bel The air cleaning filter is not attached to lows type from the catechin air filter the right side catechin air filter E Emm 5 iN Air cleaning filter Blue bellows type 38 BEEN MSZ A24NA MSY A24NA MSZ GA24NA MSY GA24NA 6 INDOOR UNIT STRUCTURAL PARTS 7 INDOOR UNIT HEAT EXCHANGER S TN Y EI Lem MK SS gt EL A gc 12 13 6 INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration LO Q ty unit MSZ MSY Part No Part Name 2 GA24 A24NA Remarks gram NA z gt E12 527 970 INSTALLATION PLATE E12 685 234 BOX 12 888 000 PANEL ASSEMBLY 12 408 142 CATCH 12 685 067 SCREW 12 888 010 GRILLE 12 534 100 AIR FILTER 12 685 975 CORNER BOX RIGHT AIR CLEANING FILTER E12 888 007 LAMP PANEL Including No 5 6 4 PC SET 3 PC SET 1 PC SET MAC 2300FT RoHS 5 oe o wl 2 N 2 NI p I kk ejN aj N elol Aaj 7 INDOOR UNIT HEAT EXCHANGER 11 E12A58620
24. the indoor unit or the TV sets or Yes radios and the outdoor unit No Are the antennas damaged Is the coaxial cable damaged Is there any poor contact in the anten Replace or repair the antenna on Yes Replace or repair the coaxial cable na wiring Is the indoor outdoor connecting wire of Extend the distance between the indoor outdoor the air conditioner and the wiring of the connecting wire of the air conditioner and the wir antennas close Yes ing of the antennas IERI oem Even if all of the above conditions are fulfilled the electromagnetic noise may enter depending on the electric field strength r the installation condition combination of specific conditions such as antennas or wiring Check the followings before asking for service 1 2 3 4 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave Channel frequency broadcast station affected by the electromagnetic noise Channel frequency broadcast station unaffected by the electromagnetic noise Layout of indoor outdoor unit of the air conditioner indoor outdoor wiring grounding wire antennas wiring from antennas receiver Electric field intensity of the broadcast station affected by the electromagnetic noise Presence or absence of amplifier such as booster Operation condition of air conditioner when the electromagnetic noise enters in 1 Turn OFF
25. 1 4 11 3 4 Weight 23 Remote controller Wireless type Control voltage by built in transformer Indoor unit model 12 24 VDC MSZ A15NA MSY A15NA MSZ A17NA MSY A17NA External finish White Power supply V phase Hz 208 230 1 60 Max fuse size time delay Disconnect switch 15 Min circuit ampacity 1 0 Fan motor 0 76 COOL Dry Wet HEAT Airflow Low Med High Powerful 268 328 381 419 240 293 342 376 254 314 381 381 254 314 381 381 Moisture removal 4 7 5 2 COOL HEAT Sound level Low Med High Powerful 34 40 45 47 34 40 46 48 34 38 44 44 34 38 44 44 Cond drain connection O D 5 8 w Dimensions D H 30 11 16 8 1 4 11 3 4 Weight 23 Remote controller Wireless type Control voltage by built in transformer Indoor unit model 12 24 VDC MSZ A24NA MSZ GA24NA MSY A24NA MSY GA24NA External finish White Power supply V phase Hz 208 230 1 60 Max fuse size time delay Disconnect switch 15 Min circuit ampacity 1 0 Fan motor 0 76 COOL Dry Wet HEAT Airflow Low Med High Powerful 296 431 568 624 265 385 508 558 296 486 568 590 350 486 568 590 Moisture removal 7 8 COOL HEAT Sound level Low Med High Powerful 34 40 49 51 34 40 48 49 Cond drain con
26. 4 INDOOR UNIT HEAT EXCHANGER ZZ NS BAM gt Symbol Q tylunit Part No Part name in Wiring MSZ MSY Remarks Diagram A12NA A15NA AT7NA A15NA 17 E02 A54 620 E02 A56 620 E02 815 666 E02 155 666 E02 151 667 INDOOR HEAT EXCHANGER UNION GAS 5 AIR CLEANING FILTER ANTI ALLERGY ENZYME FILTER e AIR CLEANING FILTER removes fine dust of 0 01 micron from air by means of static electricity e Normal life of AIR CLEANING FILTER is 1 year If AIR CLEANING FILTER is to be washed soak AIR CLEANING FILTER in water when showing dirt in lukewarm water and rinse it delicately without removing the filter from the frame about once every 3 months e Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet e Do not remove or attach AIR CLEANING FILTER during unit operation Model Part No MSZ A09 12 15 17NA MSY A15 17NA MACAR TE Replacement of the air cleaning filter 1 Remove the catechin air filter left one 2 Remove the air cleaning filter Blue bel The air cleaning filter is not attached to lows type from the catechin air filter the right side catechin air filter Air cleaning filter Blue bellows type 32 22222 210121212717 MSZ A24NA MSY A24NA 6 INDOOR UNIT STRUCTURAL PARTS 7 I
27. 4NA MSY GA24NA WIRELESS REMOTE CONTROLLER XThese pictures show MSZ A24 Signal transmitting section 60 05 Hoz al 99 50 ONOFF 0499 970 Fan speed control button MODE FAN STOP Off timer button ECONO COOL VANE OSTART WIDE VANE TIME set buttons Forward button Backward button e e x CLOCK set button L Operation display section 7 12 hy operate TOO ri TOO stop button ONIOFF war A VANE button 9 Horizontal vane button Temperature buttons Operation select button ECONO COOL button WIDE VANE button Vertical vane button Indication of 52 24 MSY A24 remote controller POWERFUL button model is on back RESET button AA Use the remote controller provided with the unit only Do not use other remote controller This diagram shows an overall view Once the operation mode is set the same operation mode can be repeated by simply turning OPERATE STOP ON OFF but ton ON Indoor unit receives the signal with a beep tone When the system turns OFF 3 minute time delay will operate to protect system from overload and compressor will not restart for 3 minutes INDOOR UNIT DISPLAY SECTION Operation Indicator lamp The operation indicator at t
28. 83 CONTROLLER HOLDER 36 MSZ A09NA MSZ A12NA MSZ A15NA MSZ A17NA MSY A15NA MSY A17NA 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 18 17 16 15 2 Part Symbol in Wiring Diagram 17 0 Remarks E12 751 509 BEARING MOUNT 111 12 001 504 SLEEVE BEARING 111 12 897 702 DRAIN HOSE 1 1 E12 A54 235 E12 A56 235 NOZZLE ASSEMBLY E12 897 303 VANE MOTOR UNIT HORIZONTAL UP amp DOWN E12 913 040 HORIZONTAL VANE E12 915 095 POWER MONITOR RECEIVER P C BOARD HOLDER E12 A49 979 CONDUIT COVER N On A OIN a E12 C30 979 CONDUIT COVER e E12 A49 780 E12 C30 780 TERMINAL BLOCK COVER E12 A49 779 E12 C30 779 TERMINAL BLOCK HOLDER gt N E12 913 375 TERMINAL BLOCK E12 A54 452 E12 A55 452 E12 A56 452 E12 A57 452 E12 A51 452 E12 A52 452 ELECTRONIC CONTROL P C BOARD X1 E12 897 308 ROOM TEMPERATURE THERMISTOR E12 A54 307 E12 A56 307 INDOOR COIL THERMISTOR E12 915 782 SWITCH HOLDER E12 A54 300 INDOOR FAN MOTOR x2 RC0J30 E12 897 333 MOTOR BAND 0 00 000 0 0 0 00 0 0 0000 0 00 RoHS E12 897 302 LINE
29. 975 Refer to 7 3 5 lt EM 20 GB 5 VDC se Indoor coil thermistor RT12 MAIN RT13 SUB CN112 2 6 N ose 2 5 d Horizontal vane 5 Pea W motor CN151 o T Z Room temperature thermistor RT11 Timer short mode point JPG JPS Refer to 7 1 Power monitor receiver P C board Indoor coil thermistor RT12 MAIN RT13 SUB Room temperature thermistor RT11 operation switch SW P C board Resistance 32 50 68 86 104122 140 Temperature F 23 b lT ecuy J B Fl sssass qsrLpa s s TW H MSZ A24NA MSY A24NA MSZ GA24NA MSY GA24NA Indoor electronic control P C board Resistor Release of Auto restart R111 Power supply input function Varistor NR11 208 230 VAC Fuse F11 Solder the Jumper wire 250 V 3 15 A to JR07 Refer to 7 3 Gi 250V T3 1SAN250V Indoor fan motor CN211 0294 325 VDC Fiducial terminal of cathode side on measur ing high voltage DC Gi 5 764829004 Display 15 VDC P C V 3 6 VDC board o AA o 0 or 15 VDC DATA
30. A a e a a position 318 17 4 24 1 The coverage range should be MSZ A15NA 381 20 9 28 8 used only as a general guideline MSZ A15NA 381 20 9 28 8 since it varies according to the MSY A15NA 342 18 8 26 0 size of the room and furniture ar MSZ A17NA 381 20 9 28 8 ranged inside MSZ A17NA 381 20 9 28 8 MSY A17NA 342 18 8 26 0 MSZ A24NA MSZ GA24NA 568 20 2 34 4 MSZ A24NA 568 20 2 34 4 MSY A24NA MSZ GA24NA 508 18 1 30 9 MSY GA24NA OUTLINES AND DIMENSIONS 4 MSZ A09NA MSY A15NA MSZ A12NA MSY A17NA MSZ A15NA MSZ A17NA Unit inch 30 11 16 Conduit plate MSZ A NA 1 and MSY A NA 1 are excluded B _ 7 16x1 Oblong hole 7 16 13 16 Oblong hole m gnstalletion 233 16 87 8 _ 87 8 _ 2 946 5 XE TB ho 18 61 5 1 3 4 e 2316 13 36 12 5 8 234 Indoor unit Air in Wall hole 22 9 16 Mu 3 16 Installation plate 2 1 8 24 9 16 4 Liquid line 1 4 19 11 16 2 5 16 3 4 Gasline 03 8 16 15 16 iin Insulation 91 3 8 93 4 I D s NN d M 2 Drain hose 05 8 Connected part O D Air out Insulation 01 1 8 MSZ A24NA MSY A24NA MSZ GA24NA MSY GA24NA 12 13 16 42 1 16 Installation plate Indoor un
31. A17NA 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 1 18 17 16 15 14 Symbol Q tylunit Part No Part name in Wiring MSZ Remarks Diagram A12NA A15NA A17NA E02 751 509 BEARING MOUNT 1 1 1 E02 001 504 5 BEARING 1 1 1 E02 897 702 DRAIN HOSE 1 1 1 1 E02 54 235 NOZZLE ASSEMBLY E02 56 235 VANE MOTOR UNIT E02 897 303 HORIZONTAL E02 913 040 HORIZONTAL VANE POWER MONITOR RECEIVER E02 915 095 PC BOARD HOLDER E02 A49 979 CONDUIT COVER E02 A49 780 TERMINAL BLOCK COVER E02 A49 779 TERMINAL BLOCK HOLDER E02 913 375 TERMINAL BLOCK 02 54 452 02 55 452 E02 A56 452 ELECTRONIC CONTROL E02 A57 452 BOARD 1 E02 A51 452 E02 A52 452 E02 897 308 UP amp DOWN I I d lo d lo d I ROOM TEMPERATURE THERMISTOR E02 A54 307 E02 A56 307 INDOOR COIL THERMISTOR E02 915 782 SWITCH HOLDER E02 A54 300 INDOOR FAN MOTOR X2 RC0J30 E02 897 333 BAND E02 897 302 FLOW X1 Including SW BOARD and POWER MONITOR RECEIVER BOARD X2 Including FAN MOTOR RUBBER MOUNT 2 PC SET 31 P I MSZ A09NA MSZ A12NA MSZ A15NA MSZ A17NA MSY A15NA MSY A17NA
32. MITSUBISHI ELECTRIC SPLIT TYPE AIR CONDITIONERS INDOOR UNIT SERVICE MANUAL MSZ AOQNA 0 MSZ A12NA MSZ A15NA MSZ A17NA MSZ A24NA MSY A15NA MSY A17NA MSY A24NA MSZ GA24NA MSY GA24NA 1 7 MSZ A09 12 15 17NA MSY A15 17NA Changes for the Better Revision D MSZ GA NA and MSY GA NA have been added Please void OB450 REVISED EDITION C 4 REVISED EDITION D Outdoor unit service manual MUZ A NA Series OB451 MUY A NA GA NA Series OB451 MXZ A NA Series 0 444 CONTENTS 1 TECHNICAL CHANGES munsnannannaasanaaannanananannanana 3 2 PART NAMES AND 4 3 SPECIFICATION munnanuaanananannansannasunsassasansasnasasnasanan 5 4 OUTLINES AND DIMENSIONS 7 5 WIRING DIAGRAM mansnunanaaaaananannanaannanaasassassaaasaas 8 6 REFRIGERANT SYSTEM DIAGRAM 9 FUNCTIONS mununsuanananaanananannanasansannanna 10 8 TROUBLESHOOTING manunsunaanaanaannansannassssasannaaa5s 11 9 DISASSEMBLY INSTRUCTIONS 25 10 PARTS LIST munaunsasunsansasananaaanaananasaasnaannssnasasnsansaas 30 10 1 PARTS LIST munnusununsanaaaananannaansassasassansansasnasa 30 10 572 5 5 LIST munusnnaanaanaanaananaanannaananan e 11 MICROPROCESSOR CONTROL NOTE LIST RoHS
33. MSZ A15NA MSZ A17NA MSY A15NA MSY A17NA OPERATING PROCEDURE PHOTOS 1 Removing the panel Photo 1 1 Remove the horizontal vane 2 Remove the screw caps of the panel Remove the screws Photo 1 3 Hold the lower part of both ends on the panel and pull it slightly toward you and then remove the panel by pushing it upward Photo 3 Screws of the panel Screw of the Horizontal vane conduit cover Terminal block Photo 2 Conduit cover Terminal block cover Conduit cover MSZ A09 12 15 17NA Screw of the conduit cover MSY A15 17NA Conduit plate MSZ A09 12 15 17NA MSY A15 17NA PROCEDURE PHOTOS 2 Removing the electronic control P C board the power monitor receiver P C board SW P C board and the terminal block 1 Remove the horizontal vane the panel refer to 1 and the corner box 2 Remove the screw of the conduit cover and conduit cover Photo 2 or Photo 3 9 Remove the indoor outdoor connecting wire 4 Remove the switch holder from the electrical cover Photo 4 5 Remove the screw of the electrical cover and then the electrical cover Photo 4 6 Remove the ground wire connected to the indoor electronic control P C board from the electrical box Photo 5 7 Unhook the power monitor receiver P C board holder from the catch Photo 4 8 Open the rear cover of the power monitor receiver P C board
34. N211 Turn ON the power supply 5 seconds or more and then press EMERGENCY OPERATION switch Measure the supply voltage as follows within 12 seconds after EMER Is there any foreign matter that interferes GENCY OPERATION switch is pressed the rotation of the line flow fan No If more than 12 seconds passes by turn OFF the power supply and turn ON it again then measure the voltage 1 Measure the voltage between CN211 and 2 Measure the voltage between CN211 GY Remove the foreign matter and X If more than 12 seconds passes after EMERGENCY OPERATION switch adjust the line flow fan is pressed the voltage mentioned above 2 goes 0 VDC although the indoor electronic control P C board is normal Is there 294 325 VDC between CN211 and and does the voltage between CN211 and rise to the range of 3 to 6 VDC within 12 seconds after EMERGENCY OPERATION switch is pressed Replace the indoor electronic control P C board The indoor fan motor error has occurred and the indoor fan repeats 12 second ON and 30 second OFF 3 times and then stops Indoor electronic control P C board Replace the indoor fan motor Measure the voltage between CN211 6 and while the fan motor is rotating 0 or 15 VDC N Replace the indoor electronic control P C board o Changed Replace the indoor fa
35. NDOOR UNIT HEAT EXCHANGER S EE SS A gt 5 See 10 1 10 MMO A 12 13 6 INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration Symbol Q ty unit Part No Part Name in Wiring Remarks Diagram MSZ A24NA MSY A24NA z o E02 527 970 INSTALLATION PLATE E02 685 234 BOX E02 888 000 FRONT PANEL ASSEMBLY E02 408 142 CATCH E02 685 067 SCREW CAP E02 888 010 GRILLE E02 534 100 CATECHIN AIR FILTER E02 685 975 CORNER BOX RIGHT AIR CLEANING FILTER E02 888 007 PANEL Including No 5 6 4 PC SET 3 PC SET 1 PC SET MAC 2300FT 1 2 3 4 5 6 7 8 9 D 7 INDOOR UNIT HEAT EXCHANGER 11 02 A58 620 INDOOR HEAT EXCHANGER 1 1 12 02 527 666 UNION GAS 1 1 25 8 13 02 151 667 UNION LIQUID 1 1 21 4 33 MSZ A24NA MSY A24NA 8 INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 9 ACCESSORY AND REMOTE CONTROLLER 8 INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that is circled is not shown in the illustration z o Part No Part Name Symbol in Wiring Diagram 21 Q ty unit MSZ A24NA MSY A24NA 22 Remarks E02 527 302 LINE FLOW FAN 02 408 509 BEARING MOUNT E02 001 504
36. ON switch so that the memorized abnormal condition is deleted Release the failure mode recall function according to Releasing the failure mode recall function mentioned above NOTE 1 Make sure to release the failure mode recall function 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 2 Blinking pattern when the indoor unit is abnormal Blinking at 0 5 Blinking at 0 5 2 5 second OFF second interval 2 5 second OFF second interval 8 tt ON OFF Beeps Repeated cycle Repeated cycle Repeated cycle X 3 Blinking pattern when the 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 ON OFF Repeated cycle Repeated cycle Repeated cycle 13 b 2 Indoor unit failure mode table Left lamp of OPERATION INDICATOR lamp Abnormal point Failure mode Condition Correspondence Not lighted Normal 1 time flash every 0 5 second Room temperature thermistor The room temperature thermistor short or open circuit is detected every 8 seconds dur ing operation Refer to the characteristics of the room temperature thermistor 8 7 2 time flash 2 5 second OFF Indoor coil thermistor The indoor coil thermistor short or open
37. TOR THERMISTOR SUBI VANE MOTOR HORIZONTAL TRANSFORMER VANE MOTOR VERTICAL VARISTOR NOTES 1 About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing d copper conductors only For field wiring 3 Symbols below indicate Terminal block cru Connector FROM OUTDOOR UNIT CONNECTING WIRES POWER SUPPLY 208 230V phase TO OUTDOOR UNIT CONNECTING WIRES 0C12 24V TERMINAL BLOCK TO OUTDOOR UNIT CONNECTING WIRE 06 X disconnect be required by local code lt RENDTE CONTROLLER MSZ GA24NA MSY GA24NA WEN AL NAUES M 208 230V 1 phase 60Hz THERMISTOR TE Fu ESSERE RT Eos nati UK H CONNECTING WIRE wi WME MOTOR TII TRANSFORMER SM TERMINAL Block T NRLL VARISTOR NOTES 1 About t refer diagram for servicing 2 06 copper conductors only For field wiring 3 Symbols below indicate C11 Terminal block Connector the outdoor side electric wiring RECEIVER SW P C BOARD X A disconnect should be P C BOARD required by local code C1CN307 POWER MONITOR P C BOARD to the outdoor unit electric wiring MSZ A09NA MSZ A12NA Refrigerant pipe 03 8 with heat insulator Indoor coil thermistor RT12 main Flared connection
38. arting time is shortened by short circuit of JPG and JPS 7 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 board Remove batteries before modification The board has a print as shown below 118 NOTE For modification take out the batteries and press the OPERATE STOP ON OFF button twice or 3 times at first After finish modification put back the batteries then press the RESET button 188 J i 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 1 unit operation 2 units operation 3 units operation 4 units operation 1 unit No modification Same as at left Same as at left Same as at left 2 unit Solder J1 Same as at left Same as at left No 3 unit Solder J2 Same as at left 4 unit Solder both J1 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
39. bnormal according to the detailed outdoor unit failure mode recall function of OPERATION INDICATOR lamp 2 Yes Judgment of indoor outdoor abnormality lene Before blinking does the left lamp of OPERATION INDICA TOR lamp stay ON for 3 seconds Stays ON for 3 seconds without beep Yes The outdoor unit is abnormal T 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 8 2 2 outdoor unit failure mode table Refer to outdoor unit service manual Make sure to check at least two consecutive blinking cycles 2 Make sure to check at least two consecutive blinking cycles 3 3 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 Y Repair the defective parts Deleting the memorized abnormal condition After 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 OPERATI
40. exchanger rises or the fixed time passes 11 4 FAN OPERATION MSY 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns ON with a beep tone 2 Select FAN mode with OPERATION SELECT button 3 Select the desired fan speed When AUTO it becomes Low Only indoor fan operates Outdoor unit does not operate 11 5 I FEEL CONTROL i OPERATION MSY 1 Press OPERATE STOP ON OFF button on the remote controller OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select FEEL CONTROL mode with OPERATION SELECT button 3 The operation mode is determined by the room temperature at start up of the operation Once the mode is fixed the mode does not change by room temperature afterwards Under the ON TIMER operation mode is determined according to the room temperature at the set time the operation starts 43 4 initial set temperature is decided by the initial room temperature Initial room temperature Initial set temperature 79 or more 75 COOL mode of FEEL CONTROL 77 to 79 F Initial room temperature minus 4 F Less than 77 F DRY mode of FEEL CONTROL Initial room temperature minus 4 F 5 TEMPERATURE buttons In FEEL CONTROL mode set temperature is decided by the microprocessor based on the room temperature In addition set temperature can be controlled by TOO WARM or
41. from the outdoor unit is not received for 6 minutes Left lamp flashes Indoor coil 2 time flash thermistor Refer to 8 7 the characteristics The indoor coil or the room temperature ther of indoor coil thermistor and Room tem mistor is short or open circuit the room temperature thermis perature 2 5 second OFF tor thermistor scu eem Left lamp flashes 3 time flash Indoor fan wososooooosSosSosooo The rotational frequency feedback signal is Refer to 8 6 Check of in motor INT MIS AE not emitted during the indoor fan operation door fan motor 2 5 second OFF Left lamp flashes 4 time flash It cannot properly read data the nonvolatile 00000 memory of the indoor electronic control P C board ingos eon 808080 00000 0 trol system 2 5 second OFF Replace the indoor electronic control P C board Indoor unit and td it d Left lamp flashes operate E 5 time flash Y Refer to How to check of in It consecutively occurs 3 times that the com verter compressor pressor stops for overcurrent protection or start up failure protection within 1 minute after Reter to outdoor unit service 2 5 second OFF start up e Check the stop valve Outdoor power sys tem oS 000808000008080 aA ESAF Left lamp flashes 6 time flash Refer to Check of outdoor Outdoor PO QR
42. he power supply No Turn OFF inverter controlled lighting Is there amplitude of 10 to 20 VDC equipment between outdoor terminal block 52 Turn OFF the power supply and then S3 Confirmation of serial signal turn ON again Yes Press EMERGENCY OPERATION Switch Is there rated voltage between Reinstall indoor terminal block S1 and S2 No lt Confirmation of power voltage gt Is there any error of the in door outdoor connecting wire such as the damage of the wire intermediate connection poor contact to the terminal block No after checking 21 Replace the indoor electronic control P C board Be sure to release the failure mode recall function Replace the indoor outdoor connecting wire Electromagnetic noise enters into sets radios Is the unit grounded Is the distance between the antennas and the indoor unit within 9 91 ft or is the distance between the antennas and the outdoor unit within 9 91 ft Is the distance between the sets radios and the indoor unit within 3 28 ft or is the distance between the TV sets or radios and the outdoor unit within 9 91 ft Ground the unit No Extend the distance between the antennas and the indoor unit and or the antennas and the outdoor unit Yes jx cub ae Extend the distance between the TV sets and or radios and
43. he right side of the indoor unit indicates the operation state The following indication applies regardless of shape of the indication Difference between Indication Operation state target temperature and room temperature 6 Lighted This shows that the air conditioner is XX Blinking operating to reach the target temperature Please until the target temperature is AEROS OF more O Not lighted obtained This shows that the room temperature is Approx 4 F or less approaching the target temperature This shows a state of standby for operation For multi system air conditioner 42 a gt sl u ww lt ss 11 1 COOL 3 OPERATION 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select COOL mode with OPERATION SELECT button 3 Press TEMPERATURE buttons TOO WARM or TOO COOL button to select the desired temperature The setting range is 61 88 F 1 Coil frost prevention When the temperature of indoor heat exchanger becomes too low the coil frost prevention mode works The indoor fan operates at the set speed and the compressor stops This mode continues until the temperature of indoor heat exchanger rises 2 Low outside temperature operation When the outside temperature lowers during cool mode operation low outside temperature operation starts and the out door fan slows or stops 11 2
44. his remote controller has a circuit to automatically reset the microprocessor control when batteries are replaced This function is equipped to prevent the microprocessor control from malfunctioning due to the voltage drop caused by the battery replacement INFORMATION FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT MXZ series Multi system air conditioner can connect two or more indoor units with one outdoor unit 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 Other indoor units cannot operate and operation indicator lamp flashes as shown in the figure below In this case please set all the indoor units to the same operation mode OPERATION INDICATOR Lighted O ix Blinking Not lighted When indoor unit starts the operation while the defrosting of outdoor unit is being done it takes a few minutes max 10 minutes to blow out the warm air In 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 12 8 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 8 4
45. holder and pull out the power monitor receiver P C board 9 Open the switch holder and pull out SW P C board 10 Pull the electronic control P C board slightly toward you from the electrical box and disconnect TAB3 and all the connectors on the electronic control P C board LD101 and LD105 are direct mounted to the electronic control P C board 11 Pull out the electronic control P C board from the electrical box 12 Remove the ground wire connected to the heat exchanger from the electrical box Photo 5 13 Unhook the catches of the electrical box and pull out the electrical box 14 Remove the screw of the terminal block cover and then remove the terminal block cover and the terminal block holder Photo 6 15 Remove the terminal block by sliding it Removing the electrical box 1 Remove the horizontal vane the panel refer to 1 and the corner box 2 Remove the screw of Conduit cover and then the indoor outdoor connecting wire Photo 2 or Photo 3 9 Remove the switch holder and the electrical cover Photo 4 4 Remove the ground wire connected to the heat exchanger from the electrical box Photo 5 5 Disconnect the following connectors on the electronic control P C board the fan motor connector lt CN211 gt the indoor coil thermistor connector lt CN112 gt the vane motor connector lt CN151 gt Photo 5 6 Unhook the catches of the electrical box and pull out the electrical box
46. ifferently set to COOL includes DRY and Unify the operation mode Operation 7 AN operates but HEAT at the same time the operation mode Refer to outdoor unit service of the indoor unit that has operated at first has manual the priority mode 2 5 second OFF indoor unit does setting not operate 8 5 TROUBLE CRITERION OF MAIN PARTS MSZ A09NA MSZ A12NA MSZ A15NA MSZ A17NA MSZ A24NA MSY A15NA MSY A17NA MSY A24NA MSZ GA24NA MSY GA24NA Part name Check method and criterion Room temperature thermistor RT 11 Measure the resistance with a tester Refer to 8 7 Test point diagram and voltage Indoor coil thermistor Indoor electronic control P C board for the chart of thermistor RT12 MAIN RT13 SUB Indoor fan motor MF Check 8 6 Measure the resistance between the terminals with a tester Horizontal vane Part temperature 50 86 F motor MV Color of the lead wire Normal MSY A15 1 BRN other 235 255 Measure the resistance between the terminals with a tester Part temperature 50 86 F Color of the lead wire Normal BRN other one 282 306 Q ORN GRN 17 8 6 TROUBLESHOOTING FLOW Check of indoor fan motor The indoor fan motor error has occurred and the indoor fan does not operate Turn OFF the power supply Pay careful attention to the high voltage on the fan motor connector C
47. ion 2 Set the time of the timer using TIME SET buttons gt J and OFF timer setting 1 Press OFF TIMER button fex during operation 2 Set the time of the timer using TIME SET buttons gt and J Each time FORWARD button gt is pressed the set time increases by 10 minutes each time BACKWARD button is pressed the set time decreases by 10 minutes 2 Cancel START To cancel ON timer press ON TIMER button STOP To cancel OFF timer press OFF TIMER button e o TIMER is cancelled and the display of set time disappears PROGRAM TIMER OFF timer and ON timer can be used in combination The timer of the set time that is reached first will operate first 4 and display shows the order of OFF timer and ON timer operation Example 1 The current time is 8 00 PM Example 2 The current time is 11 00 AM The unit turns OFF at 11 00 PM and ON at 6 00 The unit turns ON at 5 00 PM and OFF at 9 00 AM PM Current Current ON ON ON OFF OFF OFF 9 0 AF IIT pb gt i did I Litt OQ amp 6 NOTE If the main power is turned OFF or a power failure occurs while AUTO START STOP timer is active the timer set ting is cancelled As these models are equipped with an auto restart function the air conditioner
48. it 6 13 16 1 7 8 43 5 16 J 3 7 8 16 5 16 6 13 16 gt gt Wall hole 3 10 1 4 3 16 Airin Installation plate s Liquid line 01 4 19 11 16 2 3 16 L 31 1 8 i 9 15 16 L4 Gasline 05 8 16 15 16 x Insulation 01 15 16 O D 91 1 4 1 2 m H Drain hose 95 8 Air out Connected part O D 6 1 4 Wireless remote controller Insulation 1 1 8 5 WIRING DIAGRAM MSZ A09NA MSY A15NA MSZ A12NA MSY A17NA MSZ A15NA MSZ A17NA INDOOR ELECTRONIC CONTROL P C BOARD SYMBOL 08111 orong stack arii ROON TEME FUSE COIL TEMP TO OUTDOOR UNIT COIL TEMP CONNECTING WIRES FAN MOTOR RTLS 0C12 24V 26 SWITCHING HORIZONTAL TRANSFORMER TO OUTDOOR UNIT VARISTOR o f CONNECTING WIRE NOTES 1 About the outdoor side electric wiring m refer to the outdoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Q Terminal black arn Connector FROM OUTDOOR UNIT CONNECTING WIRES POWER SUPPLY 208 230V phase 60 1 th BLK O A disconnect may be required by local code MSZ A24NA MSY A24NA SYMBOL NAME SYMBOL NAME ROOM TEMP DIODE STACK THERMISTOR FUSE COIL TEMP T3 15AL250V THERNISTOR MAIN COIL TEN FAN MO
49. it does Indoor unit Indoor unit does operates only does not operate nor operates when not operate when in Test Run operate even mal operation EMERGENCY EMERGENCY operation X in Test Run in COOL or OPERATION OPERATION X Test Run operation means operation HEAT mode Switch is pressed Switch is pressed the operation within 30 minutes after EMERGENCY OPERA TION switch is pressed Check room temperature thermistor Refer to 8 7 Test point diagram and voltage Refer to How to check inverter com Refer to Check of R V Refer to 8 6 Check of remote 1 Check indoor out door connecting wire coil receiver P board controller and Check if the power is supplied to the indoor unit Refer to 8 6 Check of indoor electronic control P C board and indoor fan motor C Left lamp Left lamp Left lamp Left lamp Left lamp Left lamp Left lamp Left lamp Flash on 2 time flash 3 time flash 4 flash 5 time flash 6 flash 7 time flash 14 flash and OFF at Cause Cause Cause Cause Cause Cause Cause 0 5 second Indoor unit Indoor unit Indoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit intervals Trouble Trouble of Trouble Outdoor e Trouble of Trouble of Other ab Cause of room indoor fan of indoor power thermistor in outdo
50. l 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 X DV Lead wiring Housing point 11 EE 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 When the electronic control P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 When troubleshooting refer to 8 2 8 3 and 8 4 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 RESET button with tip end of ball point pen Then reattach the front lid or the like and then use the remote controller SS f Insert the negative pole of the batteries first Check if the polarity RESET button of the batteries is correct NOTE 1 If RESET button is not pressed the remote controller may not operate correctly 2 T
51. n motor 18 Check of remote controller and indoor electronic control P C board if the remote controller is exclusive for this air conditioner Press OPERATE STOP ON OFF button on the remote controller Y ls LCD display on tho remote controller Replace the batteries Refer to 8 1 4 visible No Not clear Yes Y Remove the batteries then set them back and press RESET button Refer to 8 1 4 Check if the unit operates with the remote controller Y A Turn radio to and press Does the unit operate with the remote gt ERATE STOP ON OFF button on the controller No remote controller Yes Y Is noise heard from radio No Replace the remote controller Yes Y Are there any fluorescent lights of rapid start type within the Y PUR mu away fram lanis range of 3 28 ft es g part No MSZ A24NA MSY A24NA MSZ A09 12 15 17NA MSZ GA24NA MSY GA24NA MSY A15 17NA Measure the voltage between receiver P C board connector CN301 No 2 and No 3 when the remote controller button is pressed Y Replace the indoor electronic control Is the voltage approx 4 VDC Yas PC board No 5 or 0 VDC Replace the receiver P C board 19 of indoor electronic control board and indoor fan motor
52. nection O D 5 8 w Dimensions D H 43 5 16 10 1 4 12 13 16 Weight 37 Remote controller Wireless type Control voltage by built in transformer NOTE Test conditions are based on ARI 210 240 12 24 VDC Rating conditions Cooling Indoor 80 FDB 67 FWB Outdoor 95 FDB 75 FWB Rated frequency Heating Indoor 70 FDB 60 FWB Outdoor 47 FDB 43 FWB Rated frequency Heating Indoor 70 FDB 60 FWB Outdoor 17 FDB 15 FWB Maximum frequency 5 TE 3 1 OPERATING RANGE 1 POWER SUPPLY Rated voltage Guaranteed Voltage V 208 230 V Min 187 208 230 253 Indoor unit 1 phase 60 Hz 2 OPERATION Intake air temperature F Condition Indoor Outdoor WB DB Standard temperature 67 95 Maximum temperature 73 115 Minimum temperature 57 14 Maximum humidity Standard temperature 60 47 Maximum temperature 67 75 65 Minimum temperature 60 5 MUZ GA24yK 4 MUZ GA24yK Except u model Cooling Heating 3 2 OUTLET AIR SPEED AND COVERAGE RANGE Air speed Coverage Model Function Air flow ft sec range 307 16 8 23 4 e air coverage range is the fig MSZ A09NA 307 16 8 23 4 ure up to the position where the 275 15 1 21 0 air speed is 1 ft sec when air is 353 19 3 26 7 blown out horizontally from the MSZ A12NA 353 19 3 26 7
53. occurs 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 To 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 to the system that allows the units to start one by one 8 TROUBLESHOOTING MSZ A09NA MSZ A12NA MSZ A15NA MSZ A17NA MSZ A24NA 5 15 MSY A17NA MSY A24NA MSZ GA24NA MSY GA24NA 8 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for miswiring 2 Take care of the following during servicing 1 Before servicing the air conditioner be sure to turn OFF the unit first with the remote controller and then after confirm ing the horizontal vane is closed turn OFF the breaker and or disconnect the power plug 2 Be sure to turn OFF the power supply before removing the front panel the cabinet the top panel and the electronic contro
54. or normality Indoor Outdoor temperature motor unit control system outdoor unit trol system unit indoor coil System abnormality Miswiring or thermistor trouble of serial signal Refer to 8 6 How to check mis wiring and serial signal error Check room temperature thermistor and indoor coil thermis tor Refer to 8 7 Test point diagram and voltage Refer to 8 6 Check of indoor fan motor Refer to Check of outdoor ther mistors Refer to How to check inverter com pressor Replace the indoor elec tronic control P C board Replace the inverter P C board or the outdoor electronic control board Check Flow recall func tion 8 4 TROUBLESHOOTING CHECK TABLE Before taking measures make sure that the symptom reappears for accurate troubleshooting When the indoor unit has started operation and detected an abnormality of the following condition the first detection after the power the indoor fan motor turns OFF and OPERATION INDICATOR lamp flashes OPERATION INDICATOR Lighted ito xx Blinking Not lighted Abnormal point Operation indicator lamp Symptom Condition Correspondence Left lamp flashes 0 5 second ON Miswiring SUEY os ocd or serial eoeoeoeo signal 0 5 second OFF Refer to 8 6 How to check miswiring and serial signal er ror The serial signal
55. r unit to blow directly onto your body Depending on the shape of the room the air may blow directly onto your body Press VANE CONTROL button again to return the vane to the previously set position The air conditioner starts the cooling or drying operation ap prox 3 minutes after the vane has moved to the horizontal position When VANE CONTROL but ton is pressed again the vane returns to the previously set position and the air conditioner starts the cool or dry operation in approx 3 minutes The air conditioner starts heating operation approx 3 minutes after the vane has moved to the horizontal position Sometimes the area around your feet may not get warm To warm the area around the feet set the horizontal vane to amp amp AUTO or the downward blowing position When VANE CONTROL button is pressed again the vane returns to the previously set position and the air conditioner starts the heat opera tion in approx 3 minutes NOTE If you make the airflow not to blow directly onto your body by pressing VANE CONTROL button the compressor stops for 3 minutes even during the operation of the air conditioner The air conditioner operates with Very Low speed until the compressor turns on again 10 ECONO COOL operation ECONOmical operation When ECONO COOL button is pressed in COOL mode set temperature is automatically set 3 6 F higher than that in COOL mode Also the ho
56. rizontal vane swings in various cycle SWING operation makes you feel cooler than set temperature So even though the set temperature is higher than that in COOL mode the air conditioner can keep comfort As a result energy can be saved ECONO COOL operation is cancelled when ECONO COOL button is pressed once again or VANE CONTROL button is pressed or change to other operation mode 11 POWERFUL operation The air conditioner automatically adjusts the fan speed and the set temperature and operates the POWERFUL mode The POWERFUL mode is automatically released 15 minutes after operation starts and the operation mode returns to the mode prior to POWERFUL operation 2 Vertical vane MSZ A24 MSY A24 MSZ GA24 MSY GA24 1 Vane motor drive These models are equipped with a stepping motor for the vertical vane The rotating direction speed and angle of the motor are controlled by pulse signals approx 12 V transmitted from microprocessor 2 The vertical vane angle and mode change as follows by pressing WIDE VANE button 2 FR 3 FR 4 FR SWING 4 5 FR 6 TR 3 Positioning is once pressed to the to confirm the standard position and then set to the desired angle Confirming of standard position is performed in the following cases a When OPERATE STOP button is pressed POWER b When SWING is started or finished c When the power supply turns ON
57. rmistors 4 Disconnect the indoor fan motor connector CN211 and the vane motor connector CN151 and CN152 on the elec tronic control P C board 5 Remove the screw of ground wire to the heat exchanger 6 Remove the fan motor lead wire and indoor coil thermistor from the electrical box 7 Remove the lead wire of vane motor from the bottom of electrical box v Screw of the 8 Remove the screw fixing the electrical box and remove the electrical box electrical box 4 OPERATING PROCEDURE PHOTOS 4 Removing the vane motor Photo 4 1 Remove the front panel Refer to 1 2 Remove the electrical cover Refer to 2 Vane motors Screws 3 Remove the lead wire of vane motor Refer to 3 of the 4 Remove the R L holder I vane 5 Pull out the drain hose from the nozzle assembly and remove 2 motor the nozzle assembly 6 Remove the screws of the vane motor and disconnect the connector 7 Remove the vane motor Photo 5 Screws of the vane motor Vane motor 5 Removing the line flow fan and the indoor fan motor 1 Remove the front panel Refer to 1 2 Remove the electrical box Refer to 3 3 Remove the drain hose from the nozzle assembly and remove the nozzle assembly 4 Remove the water cut Screws fixing 5 Slide the hole cover and remove the hole cover the left side 6 Remove the hexagon socket set screw from the line flow fan of the heat 7 Remove the screws fi
58. rt circuit outdoor terminal block S2 and S3 x1 Y Turn ON the power supply Y Does the LED on the inverter P C board or the outdoor electronic control P C board repeat 3 6 second OFF and 0 8 second ON quick blinking 3 Yes Turn OFF the power supply Remove the short circuit between outdoor terminal block S2 and S3 x1 Miswiring may damage indoor electronic control P C board during the operation Be sure to confirm the wiring is correct before the opera tion starts Be sure to check this within 3 minutes after turning ON After 3 minutes LED blinks 6 times Even when the inverter P C board or the outdoor electronic control P C board is normal LED blinks 6 times after 3 minutes Except for outdoor unit of multi system type Replace the inverter P C board or the outdoor electronic control P C board No 2 Lighted 1 2 or not X2 Be careful to the residual voltage lighted of smoothing capacitor Is there any error of the in door outdoor connecting wire such as the damage of the wire intermediate connection poor contact to the terminal block No Replace the indoor outdoor connecting wire either the unit or the light away from each other Attach a filter on remote control receiving Is serial signal error indicated 6 minutes later section of the indoor unit A Turn ON t
59. starts operating with timer cancelled when power is restored 47 E 11 9 EMERGENCY TEST OPERATION In case of test run operation or emergency operation use EMERGENCY OPERATION switch on the front of the indoor unit Emergency operation is available when the remote controller is missing has failed or the batteries of the remote controller run down The unit will start and OPERATION INDICATOR lamp will light The first 30 minutes of operation is the test run operation This operation is for servicing The Indoor fan speed runs at High speed and the system is in continuous operation with thermostat ON After 30 minutes of test run operation the system shifts to EMERGENCY COOL HEAT MODE with a set temperature of 75 F The fan speed shifts to Med All protective operations such as the coil frost prevention works even in emergency operation In the test run or emergency operation the horizontal vane operates in VANE AUTO mode Emergenoy operation continues until EMERGENCY OPERATION switch is pressed once or twice or the unit receives any signal from the remote controller In case of latter normal operation will start NOTE Do not press EMERGENCY OPERATION switch during normal operation Operation mode COOL HEAT MSZ Set temperature 75 F 75 Med Med Horizontal vane Auto Auto The operation mode is indicated by the Operation Indicator lamp as following EMERGENCY OPERATION switch
60. the power supply once and then turn ON the power supply In this situation check for the electromagnetic noise 2 Within 3 minutes after turning ON the power supply press OPERATE STOP ON OFF button on the remote controller for power ON and check for the electromagnetic noise 3 After a short time 3 minutes later after turning ON the outdoor unit starts running During operation check for the elec tromagnetic noise 4 Press OPERATE STOP ON OFF button on the remote controller for power OFF when the outdoor unit stops but the indoor outdoor communication still runs on In this situation check for the electromagnetic noise 22 8 7 Test point diagram and voltage MSZ A09NA MSZ A12NA MSZ A15NA MSZ A17NA MSY A15NA MSY A17NA Indoor electronic control P C board Power supply input Varistor NR11 208 230 VAC Fuse F11 250 V 3 15 A Resistor pias p R111 20 599 spo 4 5 DO d e Indoor fan motor I Q CN211 294 325 VDC terminal of Ai cathode side bI ing high voltage DC BUM d 15 VDC o o Release of Auto restart V T 98 VDG function a T 0 or 15 VDC Solder the Jumper wire 5 21 n cae E to JRO7 E 29
61. there might be a case that the indoor unit which is operating in AUTO cannot change over to the other operating mode COOL gt HEAT and becomes a state of standby Refer to 8 1 INFORMATION FOR MULTI SYSTEM AIR CONDITIONER 44 w w w lt w lt 11 7 AUTO VANE OPERATION 1 Horizontal vane 1 Vane motor drive These models are equipped with a stepping motor for the horizontal vane The rotating direction speed and angle of the motor are controlled by pulse signals approx 12 V transmitted from indoor microprocessor 2 The horizontal vane angle and mode change as follows by pressing VANE CONTROL button MSZ A09 12 15 17 AUTO 1 2 3 4 4 4 SWING MSY A15 17 MSZ A24 MSY A24 AUTOQ 1 2w 3 4 4 4 5 SWING MSZ GA24 MSY GA24 Horizontal Middle Downward 3 Positioning The vane is once pressed to the vane stopper to confirm the standard position and then set to the desired angle Confirming of standard position is performed in the following cases a When the operation starts or finishes including timer operation b When the test run starts c When multi standby starts or finishes 4 VANE AUTO mode In VANE AUTO mode the microprocessor automatically determines the vane angle and operation to make the optimum room temperature distribution 1 COOL and DRY operation 2 HEAT operation MSZ Vane angle is fixed to Horizontal position
62. to the indoor unit will be regarded as the remote controller for the indoor unit The indoor unit will only accept 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 10 7 3 AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller the operation mode the 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 Operation If the main power 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 Turn OFF the main power of the unit Solder the Jumper wire JRO7 on the indoor electronic control P C board Refer to 8 7 MSZ A09 12 15 17NA MSZ A24NA MSY A24NA MSY A15 17NA MSZ GA24NA MSY GA24NA JR07 operation settings memorized when 10 seconds passed after the indoor unit was operated with the remote controller f main power is turned OFF or a power failure
63. xing the motor bed and remove the fan exchanger motor Be careful not to drop the fan motor because it is heavy 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 Water cut Photo 8 Screws of the motor bed 10 PARTS LIST 10 1 PARTS LIST non RoHS compliant MSZ A09NA MSZ A12NA MSY A15NA MSY A17NA MSZ A15NA MSZ A17NA 2 ACCESSORY AND REMOTE CONTROLLER 12 1 INDOOR UNIT STRUCTURAL PARTS Symbol Q ty unit Part No Part name in Wiring MSZ MSY Remarks Diagram 09 A12NA A15NA A17NA A15NA A17NA E02 A32 234 BOX 1 E02 A49 000 PANEL ASSEMBLY E02 913 067 SCREW CAP E02 915 010 FRONT PANEL E02 915 100 CATECHIN AIR FILTER LEFT E02 916 100 CATECHIN AIR FILTER RIGHT AIR CLEANING FILTER E02 A32 975 CORNER BOX RIGHT E02 913 970 INSTALLATION PLATE E02 A49 978 CONDUIT PLATE 2 Including 3 4 2 PC SET MAC 415FT E OJIN O N A ek ZA gt a N ZA ek ek a N me 1 gt e 2 ACCESSORY AND REMOTE CONTROLLER Poz 328 REMOTE CONTROLLER 02 49 426 REMOTE CONTROLLER E02 527 083 gi 30 MSZ A09NA MSZ A12NA MSZ A15NA MSZ A17NA MSY A15NA MSY

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