msz-hj25va - e1 , er1 msz-hj35va - e1 , er1 msz-hj50va
Contents
1. 140 Hy 18 OBH647C 93 Wall hole 15 allation plate Pipin Drain hose MSZ HJ60VA Insulation 0500 2 Liquid line 08 0 39m Flared connection 6 35 Gas line 012 0 34 Flared connection 015 88 Drain hose Insulation Connected part 216 O D MSZ HJ71VA Insulation 0500 Liquid line 08 0 39 Flared connection 9 52 Gas line 012 0 34m Flared connection 015 88 Drain hose Insulation Connected part 016 O D 6 WIRING DIAGRAM MSZ HJ25VA MSZ HJ35VA MSZ HJ50VA E1 1 E 1 E1 5 ER1 SYMBOL NAME CASE OF2. MSZ HJ35VA MSZ HJ50VA 1 New model m m m MSZ HJ60VA MSZ HJ71VA 1 New model m OBH647C 2 PART NAMES AND FUNCTIONS MSZ HJ25VA MSZ HJ35VA MSZ HJ50VA Air filter Ed X Ee tb EXT man M Se Horizontal vane mergency Heat exchanger G eration m Remote control E Remote controller receiving section c Operation indicator lamp Emergency operation switch MSZ HJ60VA MSZ HJ71VA Front panel Air filter EE CHorizontal n Air outlet Heat exchanger Emergency operation switch EN Remote control receiving section Remote controller HC Operation indicator lamp gt C Emergency operation switch ACCESSORIES Installation plate Installation plate fixing screw 4 x 25 mm Battery AAA for remote controller Wireless remote controller Felt tape
3. HHHH HHHH zx 63 12 250 500 1000 2000 4000 8000 63 12 25 500 1000 2000 4 BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz Q 00 8000 Test conditions Cooling Dry bulb temperature 27 C Wet bulb temperature 19 C Heating Dry bulb temperature 20 C INDOOR UNIT WALL im 0 8m MICROPHONE OBH647C 5 9 OUTLINES AND DIMENSIONS MSZ HJ25VA MSZ HJ35VA MSZ HJ50VA 11x26 Oblong hole Installation plate 805 Indoor unit 5 232 Unit mm 11x20 Oblong hole E Le 1 41 49 MSZ HJ25 35VA Insulation 035 O D E Liquid line 06 35 0 39m Flared connection 26 35 80 Gas line 09 52 0 34m Flared connection 29 52 Drainhose Insulation Connected part 016 active length 370 MSZ HJ50VA Insulation 037 O D E Liquid line 06 35 0 39m Flared connection 26 35 Gas line 09 52 0 34m Flared connection 012 7 Drainhose InsulationZ28 Connected part 016 O D active length 370 MSZ HJ60VA MSZ HJ71VA Installation plate 26 11 Oblong hole 11x20 Oblong hole Indoor unit eem m 323 93 952 005 93 m SAS See 250 ele el
4. 10 6 Check of indoor fan motor Replace the indoor elec tronic control 22 Refer to Check of Replace the inverter P C board or the outdoor electronic control P C board Check Flow chart of the detailed outdoor unit failure mode recall func tion 10 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 ON the indoor fan motor turns OFF and OPERATION INDICATOR lamp flashes OPERATION INDICATOR Lighted X Blinking O Q Notlighted Abnormal point Operation indicator lamp Symptom Condition Remedy Upper lamp flashes 0 5 second ON Miswiring or serial eoeoeoeo signal 0 5 second OFF 4 Upper lamp flashes Indoor coil od re figs thermistor gt 195 949494949 0800 Room tem KS perature 2 5 second OFF thermistor Upper lamp flashes 3 time flash nee 06080000080808000 2 5 second OFF Upper lamp flashes 4 time flash L 2 5 second OFF Indoor unit and outdoor unit do not operate Upper lamp flashes 5 time flash Outdoor power sys tem 0000090890 P Ld 2 5 second OFF Upper lamp flashes 6 time flash Out
5. Press OPERATE STOP ON OFF button of the remote controller the set temperature isi displayed with the remote controller headed towards the indoor unit 3 1 X1 Regardless of normal or abnormal condi tion a short beep is emitted once the signal is received Y Does upper lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0 5 Indoor unit is normal seconds But the outdoor unit might be abnormal because there are some abnor Blinks Either indoor or outdoor unit is abnormal No malities that cannot be recalled with this way Beep is emitted at the same timing as the OFF Check if outdoor unit is abnormal according to the detailed outdoor unit INDICATOR lamp RD OPERATION failure mode recall function Yes Judgment of indoor outdoor abnormality y Blinks Before blinking does upper lamp of OPERATION INDICATOR lamp stay ON for 3 seconds When it stays ON for 3 seconds without beep Yes The outdoor unit is abnormal T Y Theindoorunitis abnormial The outdoor unit is abnormal Check the blinking pattern and identify the abnormal point by referring to the Check the blinking pattern and identity the abnormal point by referring 252 to the outdoor unit failure mode table Refer to outdoor unit service indoor unit failure mode table Refer to 10 2 2 Make sure to check at least two consecutive blinking cycles
6. 32 manual 9 cy LI Make sure to check at least two consecutive blinking cycles Releasing the failure mode recall function Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller Y Repair the failure parts Deleting the memorized abnormal condition CD 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 3 Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted Release the failure mode recall function according to Releasing the failure mode recall function mentioned above NOTE 1 Make sure to release the failure mode recall function after it is set up otherwise the unit cannot operate properly 2 If the abnormal condition is not deleted from the memory the last abnormal condition is kept memorized X2 Blinking pattern when the indoor unit is abnormal Blinking at 0 5 Blinking at 0 5 42 5 OFF gecond interval 5 OFF gecond interval 2 n OFF I gt 7 gt 7 lt gt lt 5 Beeps gt a 5 gt Beeps Repeated cycle
7. B as shown in the Photo 3 33 Earth wire Screw of the electrical cover Screw of the Vane motor connector CN151 Indoor coil ther mistor connec tor CN112 Connector CN10A D To indoor power P C board Indoor electronic control P C board Control P C board holder Photo 3 TAB2 Terminal block TAB1 Terminal block Electrical box Terminal block connector CN201 Indoor fan motor connector CN211 To indoor elec tronic P C board Power P C board OPERATING PROCEDURE PHOTOS 3 Removing the indoor electronic control P C board 1 Remove the panel Refer to 1 Remove the right corner box 2 Disconnect the following connectors Indoor electronic control P C board CN151 Vane motor CN112 Indoor coil thermistor CN10A To the indoor power P C board 3 Unhook the catch on the left side of the control P C board holder Pull the control P C board holder as if opening the door at 90 degrees Remove the control P C board holder from the axial rod on the electrical box 4 Remove the room temperature thermistor from the back side of the control P C board holder 5 Unhook the catches of the control P C board holder and open the control P C board holder 6 Remove the indoor electronic control P C board from the control P C board holder 4 Removing the vane motor 1 Remove the panel Refer to 1 Remove the right cor ner box 2 Rem
8. Repeated cycle Repeated cycle 3 Blinking pattern when the outdoor unit is abnormal bus Blinking at 0 5 Blinking at 0 5 Y i second interval 2 5 OFF a 3 second ON d second interval 42 5 3 second ON e x ON OFF I h JA SUR h 4 4 i No beep Beeps gt No beep Beeps gt Repeated cycle 1 Repeated cycle Repeated cycle OBH647C 2 Indoor unit failure mode table Upper lamp of OP ERATION INDICA TOR lamp Abnormal point Failure mode Condition Remedy 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 10 7 2 time flash 2 5 second OFF Indoor coil thermistor The indoor coil thermistor short or open circuit is detected every 8 seconds during operation Refer to the characteristics of the main indoor coil ther mistor the sub indoor coil thermistor 10 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 Refer to 10 6 How to check miswiring and serial signal error 11 time flash 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not emitted for the 12 seconds after the indoor fan motor is orperated Re
9. coil 1 Check indoor out door connecting wire Check if the power is supplied to the indoor Refer to 10 6 Check of remote controller and indoor electronic 3 Test Run operation means the operation within 30 minutes after EMERGENCY OPERA TION switch is pressed board control P C unit Refer to 10 6 Check of indoor P C board and indoor fan motor Upper lamp Upperlamp Upper lamp Upper lamp Upper lamp Upper lamp Upper lamp Upper lamp Flash on and 2 time flash 3 time flash 4 time flash 5 flash 6 flash 7 time flash 14 time flash off at 0 5 sec Cause Cause Cause Cause Cause Cause or more ond intervals Indoor unit Indoor unit Indoor unit Outdoor unit Outdoor unit Outdoor unit Cause Cause Trouble Trouble of Trouble 1 Outdoor e Trouble of Trouble of Outdoor unit Indoor Outdoor of room indoor fan of indoor power thermistor in outdoor con Other ab unit temperature motor unit control system outdoor unit trol system normality Miswiring or indoor coil system abnormality trouble of thermistor serial signal Refer to 10 6 0 How to check mis wiring and serial signal error OBH647C Check room temperature thermistor and indoor coil thermis tor Refer to 10 7 Test point diagram and voltage Refer to
10. 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 the P C board 3 When removing the 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 connector housing DO NOT pull the lead wires lt Incorrect gt lt Correct gt RA e Lead wiring Connector housing 3 Troubleshooting procedure 1 Check if the OPERATION INDICATOR lamp on the indoor unit is flashing ON and OFF to indicate an abnormality To make sure check how many times the OPERATION INDICATOR lamp is flashing ON and OFF before starting service work 2 Before servicing check that the connector and terminal are connected properly 3 When the 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 10 2 10 3 and 10 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 back lid and insert batteries Press RESET button with a thin instrument and Then reattach the back lid then use the remote controller Insert the minus pole of the batteries first Check if the polarity
11. remote controller No Yes OBH647C Replace the batteries Refer to 10 1 4 Turn ON a radio to AM and press OP ERATE STOP ON OFF button on the remote controller x1 Y Is noise heard from radio Yes Y Are there any fluorescent lights of inverter or rapid start type within the range of 1 m x2 Replace the indoor electronic control P C board Including the receiver 26 No Yes 1 Look at the image of the signal transmitting section of the remote controller through the monitor of a digital camera or a camera phone It is normal if the LED of the signal transmitting section lights up when the OP ERATE STOP ON OFF button on the remote control ler is pressed However it may be difficult to see the illuminated LED of the signal transmitting section with a smartphone camera x 2 If the inverter fluorescent light is turned on when the room is cool the unit may have difficulty receiving the signal from the remote controller or may not be able to operate with it if the inverter fluorescent light is turned on when the room is warm the unit may be able to operate with the remote controller Replace the remote controller Reinstall the unit away from lights Attach a filter on receiving part O Check of indoor P C board and indoor fan motor Turn OFF the power supply Remove indoor fan motor connector C
12. temperature 19 Wet bulb temperature 6 C T3 15AL250V Horizontal vane motor 12 VDC S10K300E2K1 ERZV10D471 OBH647C 5P 4 NOISE CRITERIA CURVES MSZ HJ25VA MSZ HJ35VA FAN SPEED FUNCTION SPL dB A LINE FAN SPEED FUNCTION SPL dB A LINE COOLING 43 e 9 COOLING 45 oe Super High Super High HEATING 43 O OO HEATING 44 O 90 T T T T T hi 90 80 80 70 70 NC 70 INC 70 HHH P i HIN A 60 60 NC 60 pen INC 60 1 2 HHHH HH 50 50 50 2 40 40 joo NC 40 30 30 NC 30 20 20 10 T OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR 63 125 250 500 1000 2000 4000 8000 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz o MSZ HJ50VA FAN SPEED FUNCTION SPL dB A LINE Test conditions Cooling Dry bulb temperature 27 C Wet bulb te
13. 10 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 Is there any foreign matter that interferes the rotation of the line flow fan No Yes Remove the foreign matter and adjust the line flow fan Pay enough attention to the high voltage on the fan motor connector CN211 Turn ON the power supply wait 5 seconds or more and then press EMERGENCY OPERATION switch Measure the supply voltage as follows within 12 seconds after EMER GENCY OPERATION switch is pressed If more than 12 seconds passes turn OFF the power supply and turn it ON again then measure the voltage Indoor power P C board 1 Measure the voltage between CN211 and 2 Measure the voltage between CN211 and Indoor electronic control P C board 3 Measure the voltage between CN10A GND If more than 12 seconds passes after EMERGENCY OPERATION switch is pressed the voltage measured at 2 above goes 0 VDC although the indoor P C board is normal Is there 325 VDC between CN211 and Yes Replace the indoor power P C board Yes Does the voltage between CN211 and on the power P C board rise to the range of 3 to 6 VDC within 12 seconds after EMERGENCY OPERATION switch is pressed Repla
14. 2 Indoor coil thermistor RT12 RT13 Timer short mode point XU AA Refer to eie T AT 8 1 __ 1 e A __ 1 L j s 1 GND s 2 __ 1 5V DC b 2 __ 1 c s s y _ 0 REI rS ESE pasi 0 1020 30 40 50 60 Emergency operation 12VDC Connector to indoor power Temperature C switch E O SW SW1 P C board CN10A OBH647C d 11 DISASSEMBLY INSTRUCTIONS Terminal with locking mechanism Detaching points The terminal which has the locking mechanism can be detached as shown below There are two types refer to 1 and 2 of the terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out Check the shape of the terminal before detaching 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Slide the sleeve C Hold the sleeve and GPull the terminal while pull out the terminal pushing the locking slowly lever Connector 11 1 MSZ HJ25VA MSZ HJ35VA MSZ HJ50VA NOTE Turn OFF the power supply before disassembly OPERATING PROCEDURE PHOTOS 1 Removing the panel 1 Remove the screw caps on the panel and remove the Front panel screws of the panel Horizont
15. L TEMP 0 P C BOARD D 5 THERMISTOR MAIN J UEM nt un CN10A TL11 TRANSFORMER About side wiring r 5 TB TERMINAL BLOCK refer to the outdoor unit electronic wiring diagram for servicing CN104 QD TAB o OO IU M NN un c mcos 3 Symbols indicate maus INDOOR ELECTRONIC p T pl o CONTROL P C BOARD OBH647C 7 REFRIGERANT SYSTEM DIAGRAM MSZ HJ25VA MSZ HJ35VA Unit mm Refrigerant pipe 29 52 with heat insulator Indoor coil Indoor thermistor heat X exchanger Flared connection Indoor coil thermistor RT13 Room temperature thermistor RT11 Flared connection Refrigerant pipe 26 35 with heat insulator Refrigerant flow in cooling gt Refrigerant flow in heating MSZ HJ50VA Refrigerant pipe 212 7 with heat insulator Flared connection Indoor coil thermistor Indoor coil thermistor RT13 Room temperature thermistor RT11 Flared connection Refrigerant pipe 26 35 with heat insulator Refrigerant flow in cooling Refrigerant flow in heating OBH647C 1 MSZ HJ60VA MSZ HJ71VA Unit mm Refrigerant pipe 215 88 with heat insulator Flared connection Indoor coil f thermistor RT12 L Indoor coil thermistor RT13 Room temperature the
16. MITSUBISHI ELECTRIC SPLIT TYPE AIR CONDITIONERS INDOOR UNIT SERVICE MANUAL Models MSZ HJ25VA m m MSZ HJ35VA MSZ HJ50VA MSZ HJ60VA MSZ HJ71VA MSZ HJ25VA MSZ HJ35VA MSZ HJ50VA Changes for the Better Revision C MSZ HJ60VA LE1 ER1 and MSZ HJ71VA LE1 ER1 have been added Please void OBH647 REVISED EDITION B No OBH647 REVISED EDITION C Outdoor unit service manual MUZ HJ VA Series OBH648 MXZ HJ VA Series CONTENTS 1 TECHNICAL 5 3 2 PART NAMES AND FUNCTIONS 4 3 SPECIFICATION 5 4 NOISE CRITERIA CURVES 7 5 OUTLINES AND DIMENSIONS 9 6 WIRING 10 7 REFRIGERANT SYSTEM DIAGRAM 11 8 SERVICE FUNCTIONS 13 9 MICROPROCESSOR CONTROL 15 10 19 11 DISASSEMBLY INSTRUCTIONS 32 PARTS CATALOG OBB647 NOTE RoHS compliant products have G mark on the spec name plate Use the specified refrigerant only Never use any refrigerant other than that specified Doing so may cause a burst an explosion or fire when the unit is b
17. N211 from indoor power P C board and vane Measure the resistance of indoor fan LI motor connector CN151 from the indoor motor Short circuit electronic control P C board and turn ON Refer to 10 5 Replace the indoor fan motor the power supply Does the unit operate with the remote controller Measure the resistance of the vane Short circuit Does OPERATION INDICATOR lamp light Y J motor coil Replace the vane motor and the indoor up by pressing EMERGENCY OPERATION es Refer to 10 5 electronic control P C board switch No Replace the varistor NR11 and fuse F11 Yes Is the varistor NR11 burnt and the fuse F11 blown Ne With a tester check the Turn OFF the power supply ae Check both parts side and pattern Be sure to check both the fuse RODA S the Is electricity The Yes pua and th varistor in apy case indoor control P C board and resistance is 0 Q S2 on the terminal block Is the fuse F11 blown only No Yes The thermal fuse connected to the terminal block has X1 The fan motor connector s lead wire is red failed Replace the terminal block X2 Connect of the tester to fan motor Measure the resistance between assembly whereas is black CN211 and of indoor fan connector s lead wire and to lead wire mot
18. OLLER Signal transmitting section Operation display section ON OFF operate stop button Temperature buttons ECONO COOL button Fan speed control button 4 FAN HEAT VANE SELECT 1 q RESET Seea Oe Vane control button Operation select button Timer mode select button Time set buttons pa RESET button NOTE Last setting will be stored after the unit is turned OFF with the remote controller Indoor unit receives the signal of the remote controller with beeps INDOOR UNIT DISPLAY SECTION Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state The following indication applies regardless of shape of the indication Indication Operation state Room temperature The unit is operating to About 2 C or more away Lighted reach the set temperature from set temperature DRE Or Blinking O Not lighted The room temperature is About 1 to 2 C from set approaching the set tem perature temperature 9 1 COOL 2 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 temperatur
19. SINGLE DEL O dm FL qa Rut RED pio THERMAL FUSE TO OUTDOOR 0020 50 UNIT 23 M N BLK MF FAN MOTOR es WHT 5 VANE MOTOR por 4 SET MV HORIZONTAL BLU MF VARISTOR 230V 50 P C BOARD CNOOA e n R111 RESISTOR CIRCUIT BREAKER LD104 ROOM TEMP RTL dom g THERMISTOR COIL TEMP Ho CNIOA CNEL et RTI THERMISTOR MAIN COIL TEMP CASE OF MULTI MODEL x m li pU RTI THERMISTOR SUB INDOOR ELECTRONIC Nis LA gt eS 52 can CONTROL P BOARD MV TB TERMINAL BLOCK Ng NOTES 1 About the outdoor side electronic wiring 142022 refer to the outdoor unit electronic wiring 520 CONTACTOR TO OUTDOOR no 1 N diagram for servicing EDT UNIT 2 Use copper conductors only UE For field wiring FR Symbols indicate Terminal bloc 3 3y Sooo Connector MSZ HJ60VA ie MSZ HJ71VA reni SYMBOL NAME FUSE 13 15AL250V 4 SN TO OUTDOOR TB wirst mn un Wl ME FAN MOTOR UNIT 5 BLK 11 RED 230V S TH fol MV 5 Afi lt p BLK 7 5 vARISTOR NSE dmm REACTOR POWER SUPPLY 3 o BLU m ROOM TEMP N 230V 5082 THERMISTOR CIRCUIT BREAKER INDOOR POWER e L8 aig COI
20. Used for left or left rear piping OBH647C L 3 SPECIFICATION Indoor model MSZ HJ25VA MSZ HJ35VA MSZ HJ50VA Power supply Single phase 230 V 50 Hz Breaker Capacity 0 12 Cooling 1 040 2 050 Heating 995 1 480 Running current Cooling 4 9 9 0 Total Heating 4 8 6 6 Cooling 92 99 Heating 97 Starting current 1 Total 4 9 9 0 Model RC0J40 EF Cooling 0 24 Heating 0 22 Dimensions W x Hx D 799 x 290 x 232 Weight 9 Air direction 5 Super High High Med Low Super High High Med Low Super High High Med Low Super High High Med Low Super High High Med Low Super High High Med Low Power input 1 Total Electrical data Power factor 1 Total Current 351 Fan motor Special remarks Sound level Fan speed Fan speed regulator Remote controller model NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb temperature 27 C Wet bulb temperature 19 Outdoor Dry bulb temperature 35 C Heating Indoor Dry bulb temperature 20 C Outdoor Dry bulb temperature 7 C Wet bulb temperature 6 C x1 Measured under rated operating frequency Specifications and rated conditions of main electric parts Fuse T3 15AL250V Horizont
21. act with the terminal block Yes necting wire e Turn OFF inverter controlled lighting Y Yes No equipment OFF the power supply and then Is there approximately 250 VDC 370 turn ON again M VDC between DB61 and DB61 Replace the Press the emergency operation switch on the inverter P C board in the myrer Eo outdoor unit Voltage check of the outdoor unit X2 inverter P C board in the outdoor unit After the relay Reinstall ei X2 Be careful of 140 52C is turned on ther the unit Yes VDC 280 VDC 3 minutes later is or the light dual ch 4 miswiring or the away from esia serial signal error each other the capacitor on the indicated Attach a filter Does the LED on the inverter P C main inverter circuit on remote board in the outdoor unit repeat control 3 6 second OFF and 0 8 second receiving ON quick blinking for 3 minutes Replace the section of after the outdoor unit is energized inverter P C the indoor Check the blinking pattern within 3 board in the unit minutes after LED is turned on Af outdoor unit X2 ter 3 minutes LED will blink 6 times whether the inverter P C board in the outdoor unit is normal or not Yes Replace the indoor electronic control P C board 3 3 3 Be sure to release the failure mode recall function after checking OBH647C E Electromagnetic noise enters into TV sets or radios Is the unit ear
22. again that the indoor outdoor connecting wire is correctly connected OFF With the indoor outdoor connecting wire connected bridge IK lt lt gt between S2 and 53 on the outdoor terminal block 1 iBeeps Beeps 1 Beeps lt Preparation of the remote controller gt While pressing both OPERATION SELECT button and Emergency TOO COOL button on the remote controller at the same 1 1 1 operation switch time press RESET button First release RESET button ON 1 Hold down the other two buttons for another 3 seconds gt Make sure that the indicators on the LCD screen shown in OFF the right figure are all displayed Then release the buttons 5 second Setting up the failure mode recall function 1 lt gt ON 30 second OFF Y Aim the remote controller at the indoor unit and press TP OPERATE STOP ON OFF button The relay 52C will X1 Make sure that the wiring is correct If the pro be turned on and the outdoor unit will be energized cedure is performed without correcting miswir ing it may lead to damage to the P C board Y Is the rated supply voltage applied between the 51 and S2 on the A outdoor terminal block Check of Is there any problem in the indoor outdoor connecting wire 9 such as the damage of the wire 3 Replace the indoor outdoor con intermediate connection poor S supply voltage Ng cont
23. al vane 2 Pull the panel slightly toward you and then remove the panel by pushing it upward Screws of the panel OBH647C OBH647C OPERATING PROCEDURE PHOTOS 2 Removing the indoor power P C board and the electrical box 1 Remove the panel Refer to 1 Remove the right corner box 2 Disconnect the following connectors Indoor electronic control P C board CN151 Vane motor CN112 Indoor coil thermistor CN10A To the indoor power board 3 Unhook the catch on the left side of the control P C board holder Pull the control P C board holder as if opening the door at 90 degrees Remove the control P C board holder from the axial rod on the electrical box 4 Remove the screw of the V A clamp 5 Remove the V A clamp and the indoor outdoor connect ing wire 6 Remove the earth wire connected to the indoor heat exchanger from the electrical box 7 Remove the screw of the electrical cover and remove the electrical cover 8 Disconnect the following connectors Indoor power P C board CN211 Indoor fan motor CN201 TAB1 TAB2 Terminal block 2 To the indoor electronic control P C board 9 Remove the upper catch of the electrical box and pull out the electrical box To attach the electrical box pass the wires connecting the indoor power P C board and the indoor electronic control P C board through A Pass the lead wires of the fan motor through
24. al vane motor 12 VDC Varistor S10K300E2K1 ERZV10D471 Terminal block 5P OBH647C Indoor model MSZ HJ60VA MSZ HJ71VA Power supply Single phase 230 V 50 Hz Breaker Capacity 16 Power input 3441 Total Heating Running current 3421 Cooling Total Heating Cooling Electrical data Power factor amp 1 Total Heating Starting current 1 Total Model RC0J30 MD Cooling Fan motor Current 1 0 49 Heating 0 49 Dimensions WxH xD 923 x 305 x 250 Weight 13 Air direction 5 Super High 1 192 High 900 Med 729 Low Super High 1 192 High Med Low Super High High Med Low Super High High Special remarks Sound level Med Low Super High High Med Low Super High Fan speed High Med Low Fan speed regulator Remote controller model NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb temperature 27 C Outdoor Dry bulb temperature 35 C Heating Indoor Dry bulb temperature 20 C Outdoor Dry bulb temperature 7 C 1 Measured under rated operating frequency Specifications and rated conditions of main electric parts Fuse Wet bulb
25. ce the indoor fan motor Does the voltage between CN10A and GND on the indoor electronic control P C board fall to 2 V or less within 12 seconds after No 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 Measure the voltage between CN211 and while the fan motor is rotating Replace the indoor power P C Yes Unchanged OBH647C Measure the voltage CN10A Is it unchanged holding and GND on the indoor Y 0 or 15 VDC No electronic control P C board when Yes Changed the fan motor is rotaring Unchanged Replace the indoor fan motor i Replace the indoor Is it unchanged holding electronic control P C 0 or 5 VDC No board Changed 25 Check of remote controller and indoor electronic control P C board Check if the remote controller is exclusive for this air conditioner Press OPERATE STOP ON OFF V button on the remote controller Is LCD display on the remote controller visible No Not clear ia Remove the batteries then set them back and press RESET button Refer to 10 1 4 Check if the unit operates with the remote controller Does the unit operate with the
26. door thermistors 40 09090909 L 2 5 second OFF Upper lamp flashes 7 time flash Outdoor control sys tem 2 5 second OFF Upper lamp flashes 14 time flash or more Other ab w w wow normality 080804000006 TS don b Ld 5 second OFF The serial signal from the outdoor unit is not received for 6 minutes Refer to 10 6 How to check miswiring and serial signal er ror The indoor coil or the room temperature ther mistor is short or open circuit Refer to the characteristics of indoor coil thermistor and the room temperature thermistor 7 The rotational frequency feedback signal is not emitted during the indoor fan operation Refer to 10 6 Check of indoor fan motor 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 It consecutively occurs 3 times that the com pressor stops for overcurrent protection or start up failure protection within 1 minute after start up Refer to How to check of in verter compressor Refer to outdoor unit service manual Check the stop valve The outdoor thermistors short or open circuit during the compressor operation Refer to Check of outdoor thermistor Refer to outdoor unit service manual It cannot properly read data i
27. e The setting range is 16 31 C 1 Coil frost prevention The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil from frosting 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 OBH647C 9 2 DRY A 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 works the same way as that in COOL mode 9 1 1 9 3 HEAT 3 OPERATION 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 16 31 C 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 The compressor operational frequency is controlled by th
28. e temperature of the indoor heat exchanger to prevent the con densing pressure from increasing excessively When the temperature of indoor heat exchanger becomes too high the high pressure protection works The indoor fan operates following the cold air prevention control This mode continues until the temperature of indoor heat exchanger falls 3 Defrosting Defrosting starts when the temperature of outdoor heat exchanger becomes too low The compressor stops once the indoor outdoor fans stop the 4 way valve reverses and the compressor re starts This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes 9 4 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 approximately 12 V transmitted from indoor microprocessor 2 The horizontal vane angle and mode change as follows by pressing VANE CONTROL button 4 AUTO 1 2 3 4 s 5 SWING 9 Positioning To confirm the standard position the vane moves until it touches the vane stopper Then the vane is set to the selected 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 4 VANE AUTO mode In VANE AUTO mode the microprocessor a
29. eed shifts to Med The coil frost prevention works even in the test run or the emergency operation In the test run or emergency operation the horizontal vane operates in VANE AUTO mode Emergency operation continues until EMERGENCY OPERATION switch is pressed once or twice or the unit receives any signal from the remote controller In the latter case normal operation will start NOTE Do not press EMERGENCY OPERATION switch during normal operation Operation mode COOL HEAT Set temperature 24 C 24 C Fan speed Med Med Horizontal vane Auto Auto The operation mode is indicated by the Operation Indicator lamp as following Operation Indicator lamp EMERGENCY OPERATION switch E 0 SW EMERGENCY COOL Lighted EMERGENCY HEAT O Notlighted STOP OO XO O 9 7 3 MINUTE TIME DELAY OPERATION When the system turns OFF compressor will not restart for 3 minutes as 3 minute time delay function operates to protect compressor from overload OBH647C 10 TROUBLESHOOTING MSZ HJ25VA MSZ HJ35VA MSZ HJ50VA MSZ HJ60VA MSZ HJ71VA 10 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for miswiring 2 Take care of the following during servicing 1 Before servicing the air conditioner be sure to turn OFF the main unit first with the remote controller and then after
30. eft side of the control P C 7 c board holder the control P C board holder as if m p p opening the door at 90 degrees Remove the control P C board holder from the axial rod on the electrical box f 4 Remove the screw of the V A clamp Indoor coil ther 5 Remove the V A clamp and the indoor outdoor con mistor connec necting wire EB tor CN112 6 Remove the screws of the earth plate Photo 2 7 Remove the indoor coil thermistor from the water cover eua sa 8 oe of the water cover and remove To indoor power P C board 9 Remove the screw of the electrical cover and remove Indoor electronic the electrical cover control P C board Control P C board holder 10 Disconnect the CN211 Indoor fan motor from the Vane motor indoor power P C board connector CN151 11 Remove the upper catch of the electrical box and pull Photo 3 out the electrical box x To attach the electrical box pass the wires connecting the indoor power P C board and the indoor electronic control P C board through A Pass the lead wires of the fan motor through B as shown in the Photo 3 12 Disconnect the following connectors and tabs Indoor power P C board CN201 TAB1 TAB2 Terminal block r Connector CN20A 20 the indoor electronic control P C board 2 2 TAB2 Terminal block 1 Terminal block Terminal block connector CN201 Indoor fan motor con
31. eing used serviced or disposed of Correct refrigerant is specified in the manuals and on the spec labels provided with our products We will not be held responsible for mechanical failure system malfunction unit breakdown or accidents caused by failure to follow the instructions Preparation before the repair service Prepare the proper tools Prepare the proper protectors Provide adequate ventilation After stopping the operation of the air conditioner turn off the power supply breaker and remove the power plug Discharge the capacitor before the work involving the electric parts Precautions during the repair service gt e Do not perform the work involving the electric parts with wet hands Do not pour water into the electric parts Do not touch the refrigerant Do not touch the hot or cold areas in the refrigeration cycle When the repair or the inspection of the circuit needs to be done without turning off the power exercise great caution not to touch the live parts Revision A e MSZ HJ50VA E1 has been added Revision B MSZ HJ25VA ER a MSZ HJ35VA m Mere R and MSZ HJ50VA ER a have been added Revision C MSZ HJ60VA LE1 ER1 and MSZ HJ71VA E1 ER1 have been added OBH647C 1 TECHNICAL CHANGES m m a MSZ HJ25VA
32. fer to 10 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 10 4 OBH647C 21 10 3 INSTRUCTION OF TROUBLESHOOTING Start Y Indoor unit does not receive the signal from remote controller OPERATION INDICATOR lamp on the indoor unit is flashing on and off Indoor unit operates Outdoor unit does not operate normally Indoor unit oper ates Outdoor unit does not operate If blinking of OPERATION INDI CATOR lamp cannot be checked it can be checked with failure Outdoor unit Outdoor unit Unit does not Indoor unit Indoor unit does mode recall function operates only does not operate nor operates when not operate when in Test Run operate even operation EMERGENCY EMERGENCY operation in Test Run in COOL or OPERATION OPERATION operation X HEAT mode switch is pressed Switch is pressed Check room temperature thermistor Refer to 10 7 Test point diagram and voltage Refer to How to check inverter com pressor Refer to Check of R V
33. lder 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 No 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 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 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 OBH647C 8 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 AUTO RESTART FUNCTION automatically starts operation in the same mode just before the shutoff of the main power Operation If the main power has been cut the operation settings remain After the power is restored the unit restarts auto
34. ling it 12 Remove the screws fixing the left side of the heat exchanger Screw of the line flow fan 13 Lift the heat exchanger and pull out the line flow fan to the lower left When attaching the line flow fan screw the line flow fan Photo 7 Earth wire so 4 mm gap is provided between the right end of the Motor band line flow fan and the right wall of the air passage of the box Figure 1 Figure 1 Water cover Screws of the motor bed Photo 8 Photo MSZ HJ50VA Screws of the left side of the heat exchanger OBH647C A 11 2 MSZ HJ60VA MSZ HJ71VA OPERATING PROCEDURE NOTE Turn OFF the power supply before disassembly PHOTOS 1 Removing the panel 1 Remove the screw caps on the panel and remove the screws of the panel 2 Pull the panel slightly toward you and then remove the panel by pushing it upward OBH647C 36 Photo 1 Front panel Screws of the panel OPERATING PROCEDURE PHOTOS 2 Removing the indoor power P C board and the Photo 2 electrical box 1 Remove the panel Refer to 1 Remove the right cor ner box 2 Disconnect the following connectors Indoor electronic control P C board 7 Z Screw of the CN151 Vane motor 4 electrical cover CN112 Indoor coil thermistor CN10A To the indoor power P C board Water cover Screws of the earth plate 1 E EL 3 Unhook the catch on the l
35. matically according to the memory However it takes at least 3 minutes for the compressor to start running How to disable AUTO RESTART FUNCTION D Turn off the main power for the unit 9 Cut the Jumper wire to JR77 on the indoor electronic control P C board Refer to 10 7 Indoor electronic control P C board JR77 NOTE The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller If main power is turned OFF or a power failure occurs while AUTO START STOP timer is active the timer setting is can celled If 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 OBH647C 9 MICROPROCESSOR CONTROL MSZ HJ25VA MSZ HJ35VA MSZ HJ50VA MSZ HJ60VA MSZ HJ71VA WIRELESS REMOTE CONTR
36. mperature 19 C COOLING 45 e e6 Heating Dry bulb temperature 20 C HEATING 47 0 0 Super High 90 INDOOR UNIT z gt gt 80 im 70 F NC 70 0 8m MLN 4 60 50 o 1 71 1 1 50 40 30 TNC 30 20 NC 10 NC 20 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR DO 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz O Lu peti tii ity EPR 10 OBH647C MSZ HJ60VA MSZ HJ71VA FAN SPEED FUNCTION SPL dB A LINE FAN SPEED FUNCTION SPL dB A LINE COOLING 50 COOLING 50 oe Super High Super High HEATING 49 49 90 T T T 90 80 80 4 70 70 60 60 i F Loi in 50 50 40 40 30 30 20 20 NC 20 NC 20 10 3 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR
37. n the nonvolatile memory of the inverter P C board or the out door electronic control P C board Replace the inverter P C board or the outdoor electronic con trol P C board Refer to outdoor unit service manual An abnormality other than above mentioned is detected e Check the stop valve Check the 4 way valve Confirm the abnormality in detail using the failure mode recall function for outdoor unit Outdoor 2 Outdoor unit control sys Upper lamp lights up does not oper tem ate It cannot properly read data in the nonvolatile memory of the inverter P C board or the out door electronic control P C board OBH647C M Check the blinking pattern of the LED on the inverter P C board or the outdoor electronic control P C board 10 5 TROUBLE CRITERION OF MAIN PARTS MSZ HJ25VA MSZ HJ35VA MSZ HJ50VA MSZ HJ60VA MSZ HJ71VA Part name Check method and criterion Room temperature Measure the resistance with a tester thermistor RT11 Refer to 10 7 Test point diagram and voltage 2 Indoor electronic control Indoor coil thermistor RT12 RT13 P C board for the chart of thermistor Indoor fan motor MF Check 10 6 Measure the resistance between the terminals with a tester My Part temperature 10 30 C ane motor MV Color of the lead wire Normal RED BLK 235 2550 BLK BLK 24 OBH647C
38. nector CN211 Electrical box OBH647C d OPERATING PROCEDURE PHOTOS 3 Removing the indoor electronic control P C board 1 Remove the panel Refer to 1 Remove the right corner box 2 Disconnect the following connectors Indoor electronic control P C board CN151 Vane motor CN112 Indoor coil thermistor CN10A To the indoor power P C board 3 Unhook the catch on the left side of the control P C board holder Pull the control P C board holder as if opening the door at 90 degrees Remove the control P C board holder from the axial rod on the electrical box 4 Remove the room temperature thermistor from the back side of the control P C board holder 5 Unhook the catches of the control P C board holder and open the control P C board holder 6 Remove the indoor electronic control P C board from the control P C board holder Photo 4 Control P C board holder Inside Catch Indoor electronic control P C board Room temperature thermistor 4 Removing the vane motor 1 Remove the panel Refer to 1 Remove the right cor ner box 2 Remove the control P C board holder water cover and the electrical box Refer to 2 3 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly 4 Remove the screws of the vane motor and remove the vane motor 5 Disconnect the connector from the vane motor 38 OBH647C Photo 5 Screws of
39. nnecting TAB2 2 Indoor electronic control P C board Room temperature thermistor RT11 CN111 To disable Auto restart function cut the Jumper wire to JR77 Refer to 8 3 Connector to Vane motor Indoor coil CN151 thermistor 4 RT12 RT13 Room temperature thermistor RT11 CN112 Indoor coil thermistor RT12 RT13 Timer short mode point Refer to 8 1 lt GND g c 5 5V DC a 0 0 10 20 30 40 50 60 Emergency operation 12V DC Connector to indoor power Temperature C switch E O SW SW1 P C board CN10A OBH647C m MSZ HJ60VA MSZ HJ71VA 1 Indoor power P C board 12 VDC Connector to indoor electronic 5 VDC control P C board CN20A Indoor terminal block Indoor terminal block connecting TAB2 connecting TAB1 P Connector to Terminal block 201 o of s b gt Fuse F11 3 T3 15AL250V 9 11 Connector to Indoor fan s motor CN211 325 VDC Reactor L111 GND _ 0 or 15 VDC High voltage DC 3 6 VDC 015 VDC 2 Indoor electronic control P C board Room temperature thermistor RT11 CN111 To disable Auto restart function cut the Jumper wire to JR77 Refer to 8 3 Connector to Vane motor 2 Indoor coil CN151 thermistor RT12 RT13 Room temperature thermistor RT11 CN11
40. of the batteries is correct NOTE 1 If RESET button is not pressed the remote controller may not operate correctly 2 This remote controller has a circuit to automatically reset the microcomputer when batteries are replaced This function is equipped to prevent the microcomputer from malfunctioning due to the voltage drop caused by the battery replacement 3 Do not use the leaking batteries OBH647C E 10 2 FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once Even though LED indication listed on the troubleshooting check table 10 4 disappears the memorized failure details can be recalled This mode is very useful when the unit needs to be repaired for the abnormality which does not recur 1 Flow chart of failure mode recall function for the indoor outdoor unit 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 Hold down the other two buttons for another 3 seconds Make sure that the indicators on the LCD screen shown in the right figure are all displayed Then release the but tons Y
41. oor coil thermistor to the clip shape holder shape part the Clip shape Holder shape lead wire should point down About the same length b Position and procedure for mounting the clip shape part 1 Set the indoor coil 2 Check the marked 3 Mount the thermistor in the center mounting position clip shape part of the clip shape part NOTE m Take care to avoid loss and accidental falling of the clip shape part inside the unit m Mount the clip shape part on the marked position m Do not pull the lead wire when removing the indoor coil thermistor MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Oct 2014 No OBH647 REVISED EDITION C Distributed in Dec 2013 No OBH647 REVISED EDITION B Distributed in Mar 2013 No OBH647 REVISED EDITION A Distributed in Dec 2012 No OBH647 New publication effective Oct 2014 Made in Japan Specifications are subject to change without notice OBH647C ka
42. or connector X1 3 2 otherwise the resistance cannot be measured properly X3 Please replace the fuse after removing the Y indoor power P C board from the electrical Replace the fuse F11 and the box Is the resistance 1 or more No indoor fan motor X3 Yes Replace the fuse F11 Replace the indoor L sue b teresken resistor poner PO board he board reactor L111 approximately 4 Q board and the indoor fan motor Yes Is the approximately 5 VDC between 5 V and GND of the indoor electronic control P C board Is there ndoor electronic control approximately 9 V to 13 VDC between fan motor P C board 12 V and GND of the indoor electronic control P C board No GND Is the connector CN10A on lt CN10A the indoor electronic control Connect the connector 1 or repair P C board or lead wires Yes disconnection disconnected Indoor power P C board Indoor power P C board Replace the indoor electronic control P C board 1 12 VDC 5 VDC X R111 CN211 CN211 L111 MSZ HJ25 35 50VA MSZ HJ60 71VA OBH647C A How to check miswiring and serial signal error Turn OFF the power supply Y Is there rated vol
43. ove the control P C board holder and the electrical box Refer to 2 3 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly 4 Remove the screws of the vane motor and remove the vane motor 5 Disconnect the connector from the vane motor OBH647C Photo 4 Control P C board holder Inside Catch Indoor electronic control P C board Catch Control P C board holder Back side Room temperature thermistor Photo 5 Screws of the vane motor OPERATING PROCEDURE PHOTOS 5 Removing the indoor fan motor the indoor coil Photo 6 thermistor and the line flow fan 1 Remove the panel Refer to 1 Remove the right cor ner box 2 Remove the control P C board holder the electrical box and the nozzle assembly Refer to 2 3 Remove the screws fixing the motor bed 4 Disengage the hooks of the water cover and remove the water cover 5 Disconnect the earth wire from the motor band 6 Remove the indoor coil thermistor from the motor band 7 Loosen the screw fixing the line flow fan 8 Remove the motor bed together with the indoor fan motor and the motor band 9 Disconnect the lead wire of the fan motor from the motor band 10 Disengage the hooks of the motor band and remove the motor band Pull out the indoor fan motor 11 Remove the indoor coil thermistor from the heat exchanger Install the indoor coil thermistor in its former position when assemb
44. peration mode 9 5 TIMER OPERATION ON OFF TIMER 1 How to set the timer 1 Press OPERATE STOP ON OFF button to start the air conditioner 2 Select the timer mode by pressing the button during operation Each time this button is pressed the timer mode is changed in sequence gt O OFF TIMER gt gt ON TIMER TIMER RELEASE 3 Set the time of the timer using the button Each time this button is pressed the set time increase or decrease by 1 hour to 12 hours 2 To release the timer SELECT Press the button until gt O OFF TIMER and ON TIMER not displayed NOTE The OFF TIMER and the ON TIMER cannot be set at the same time The displayed time is the time remaining and will decrease in 1 hour increments as time passes OBH647C 9 6 EMERGENCY TEST OPERATION In the case of test run operation or emergency operation use EMERGENCY OPERATION switch on the right side of the indoor unit Emergency operation is available when the remote controller is missing or has failed or when the batteries in the remote controller are running down The unit will start and OPERATION INDICATOR lamp will light up The first 30 minutes of operation is the test run operation This operation is for servicing The indoor fan runs at High speed and the temperature control does not work After 30 minutes of test run operation the system shifts to EMERGENCY COOL HEAT MODE with a set temperature of 24 The fan sp
45. rmistor RT11 Flared connection Refrigerant pipe 26 35 MSZ HJ60VA 09 52 MSZ HJ71VA with heat insulator Refrigerant flow in cooling Refrigerant flow in heating OBH647C 8 SERVICE FUNCTIONS MSZ HJ25VA MSZ HJ35VA MSZ HJ50VA MSZ HJ60VA MSZ HJ71VA 8 1 TIMER SHORT MODE For service the following set time can be shortened by bridging the timer short mode point on the electronic control P C board Refer to 10 7 Set time 3 minute 3 second It takes 3 minutes for the compressor to start operation However the starting time is shortened by bridging the timer short mode point NOTE While the relay 52C is ON the compressor starting time cannot be shortened 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 board Remove batteries before modification The board has a print as shown below NOTE For modification take out the batteries and press the OPERATE STOP ON OFF button 2 or 3 times at first After finish modification put back the batteries then press the RESET button 4 UR78PBO614 1 O The P C board has the print J1 and J2 So
46. tage in the Check the power suppl power supply No PES Yes 1 Turn ON the power supply 2 Press the emergency operation switch No Has the relay 52C been turned on 3 minuets later The relay will be turned on in 3 to 7 seconds by v bridging the timer short mode point Refer to 10 7 receiving system The microprocessor may have mistaken the unit as a model receiving power from the outdoor unit Follow the procedure below to start the determination of the power receiv ing system all over again 1 Hold down the emergency operation Switch for 30 seconds Do not release the Initializing the determination of the power Yes Has the miswiring or the serial error No been indicated Yes Indication of miswiring Indication of serial signal error Switch even though a buzzer beeps once OPERATION in about 5 seconds Keep holding down INDICATOR lamp the switch until a buzzer beeps again for Continuous blinks 1 second after 30 seconds Figure 1 Is there any miswiring poor 2 Turn off the power supply y 9 p contact wire disconnec 3 Wait for about 30 seconds Correct them them tion of the indoor outdoor 4 Turn on the power supply connecting se 5 Press the emergency operation switch 6 The relay 52C will be turned on in 3 min utes Figure 1 Y Buzzer 0 5 second 1 second ON potas S Turn OFF the power supply Make sure
47. the vane motor OPERATING PROCEDURE PHOTOS 5 Removing the indoor fan motor the indoor coil thermistor and the line flow fan 1 Remove the panel Refer to 1 Remove the right cor ner box 2 Remove the control P C board holder the water cover the electrical box and the nozzle assembly Refer to 2 3 Remove the screws fixing the motor bed 4 Loosen the screw fixing the line flow fan 5 Remove the motor bed together with the indoor fan motor and the motor band 6 Disconnect the lead wire of the fan motor from the motor band 7 Disengage the hooks of the motor band and remove the motor band Pull out the indoor fan motor 8 Remove the indoor coil thermistor from the heat exchanger Install the indoor coil thermistor in its former position when assembling it 9 Remove the screws fixing the left side of the heat exchanger 10 Lift the heat exchanger and pull out the line flow fan to the lower left When attaching the line flow fan screw the line flow fan so 4 mm gap is provided between the right end of the Photo 7 line flow fan and the right wall of the air passage of the box Figure 1 Screw of the line flow fan Screws of the motor bed Figure 1 Screws of the left side of the heat exchanger OBH647C E Fixing the indoor coil thermistor x There are 2 forms of parts for fixing the indoor coil thermistor When fixing the ind
48. thed No Earth the unit Yes RA Extend the distance between the antennas and the indoor unit and or the antennas and the distance between the antennas and the Yes outdoor unit outdoor unit within 3 m E ERE ies n Extend the distance between the TV sets and or is the distance between the TV sets Yes e m Ha HA radios and the outdoor unit within 3 m 5 Are the antennas damaged Is the coaxial cable damaged Replace or repair the antenna Is there any poor contact in the anten Yes Replace or repair the coaxial cable na wiring Is the indoor outdoor connecting wire Extend the distance between the indoor outdoor of the air conditioner and the wiring of connecting wire of the air conditioner and the wir the antennas close Yes ing of the antennas Even if all of the above conditions are fulfilled the electromagnetic noise may enter depending on the electric field strength or the installation condition combination of specific conditions such as antennas or wiring Check the following before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indoor outdoor unit of the air conditioner indoor outdoor wiring earth
49. utomatically determines the vane angle to make the optimum room tempera ture distribution In COOL and DRY operation In HEAT operation Vane angle is fixed to Horizontal position Vane angle is fixed to Angle 4 Horizontal do osition OBH647C 9 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 3 5 when the compressor cumulative operation time exceeds 1 hour the vane angle automatically changes to Angle 2 for dew prevention 7 SWING N mode By selecting SWING mode with VANE CONTROL button the horizontal vane swings vertically 8 Cold air prevention in HEAT operation The horizontal vane position is set to Upward 9 ECONO COOL Zi operation ECONOmical operation When ECONO COOL button is pressed in COOL mode set temperature is automatically set 2 C higher Also the horizontal vane swings in various cycle SWING operation makes you feel cooler than set temperature So even though the set temperature is higher 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 o
50. wire antennas wiring from antennas receiver Electric field intensity of the broadcast station affected by the electromagnetic noise Presence or absence of amplifier such as booster Operation condition of air conditioner when the electromagnetic noise enters in 1 Turn OFF the power supply once and then turn ON the power supply In this situation check for the electromagnetic noise 2 Within 3 minutes after turning ON the power supply press OPERATE STOP ON OFF button on the remote controller for power ON and check for the electromagnetic noise 3 After a short time 3 minutes later after turning ON the outdoor unit starts running During operation check for the electromagnetic noise 4 Press OPERATE STOP ON OFF button on the remote controller for power OFF when the outdoor unit stops but the indoor outdoor communication still runs on In this situation check for the electromagnetic noise OBH647C 10 7 TEST POINT DIAGRAM AND VOLTAGE MSZ HJ25VA MSZ HJ35VA MSZ HJ50VA 1 Indoor power P C board Connector to Fuse 11 T3 15AL250V Connector to Indoor fan motor CN211 0 or 15 VDC 3 6 VDC 0 15 GND High voltage DC 5 325 VDC Indoor terminal block 12 VDC GND 5 VDC connecting TAB1 Connector to indoor electronic Indoor terminal block control P C board CN20A co
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