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INDOOR UNIT

SERVICE MANUAL

Outdoor unit service manual

MUZ-AP∙VG Series (OBH839)

MXZ-D∙VA Series (OBH626)

MXZ-E∙VA Series (OBH723)

MXZ-F∙VF Series (OBH790)

PARTS CATALOG (OBB838)

MSZ-AP15VG

MSZ-AP20VG

CONTENTS

1. TECHNICAL CHANGES

······························

2. PART NAMES AND FUNCTIONS

··················4

3. SPECIFICATION

········································5

4. NOISE CRITERIA CURVES ··························

5. OUTLINES AND DIMENSIONS ·····················

6. WIRING DIAGRAM

·····································

7. REFRIGERANT SYSTEM DIAGRAM

··········· 11

8. SERVICE FUNCTIONS

······························

9. MICROPROCESSOR CONTROL

················ 14

10. TROUBLESHOOTING

·······························

11. DISASSEMBLY INSTRUCTIONS

·················

Models

MSZ-AP15VG

ET1

ER1

ET2

MSZ-AP20VG

ET1

ER1

ET2

MSZ-AP15VGK

ET1

ER1

MSZ-AP20VGK

ET1

ER1

OBH838 REVISED EDITION-A is void.

Revision

• MSZ-AP15/20VG-

ET2

and

MSZ-AP15/20VGK-

ET1

ER1

have

been added.

No. OBH838

REVISED EDITION-B

Содержание WSH-AP20WI SET

Страница 1: ...ION 5 4 NOISE CRITERIA CURVES 6 5 OUTLINES AND DIMENSIONS 7 6 WIRING DIAGRAM 8 7 REFRIGERANT SYSTEM DIAGRAM 11 8 SERVICE FUNCTIONS 12 9 MICROPROCESSOR CONTROL 14 10 TROUBLESHOOTING 21 11 DISASSEMBLY INSTRUCTIONS 35 Models MSZ AP15VG E1 ET1 ER1 E2 ET2 MSZ AP20VG E1 ET1 ER1 E2 ET2 MSZ AP15VGK E1 ET1 ER1 MSZ AP20VGK E1 ET1 ER1 OBH838 REVISED EDITION A is void Revision B MSZ AP15 20VG E2 ET2 and MSZ A...

Страница 2: ... 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 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...

Страница 3: ...the outdoor units with low standby power control Connecting these models to the MUZ AP VG series outdoor units enables the low standby power control These models may be connected to the MUZ AP VG series after once connected to the MXZ series and operated for exam ple because of relocation In that case the MUZ AP VG series outdoor units will not operate without taking a step Follow the procedure De...

Страница 4: ...ft rear piping 1 5 Battery AAA for 3 2 MSZ AP15VG MSZ AP15VGK MSZ AP20VG MSZ AP20VGK PART NAMES AND FUNCTIONS 2 Remote controller Operation indicator lamp Remote control receiving section Horizontal vane Air outlet Air ﬁlter Heat exchanger Emergency operation switch Front panel Spec name plate Wi Fi interface Air inlet MSZ AP VGK OBH838B ...

Страница 5: ...Silent 21 Heating Super High dB A 40 42 High 35 Med 30 Low 26 Silent 21 Fan speed Cooling Super High rpm 1 430 1 530 High 1 250 1 250 Med 1 080 1 080 Low 940 940 Silent 860 Heating Super High rpm 1 430 1 530 High 1 290 Med 1 110 Low 990 Silent 870 Fan speed regulator 5 Remote controller model VG E1 ET1 ER1 SG19C Others SH20B NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb temper...

Страница 6: ... 42 42 NC 10 MSZ AP20VG MSZ AP20VGK Test conditions Cooling Dry bulb temperature 27 C Wet bulb temperature 19 C Heating Dry bulb temperature 20 C INDOOR UNIT WALL MICROPHONE 0 8m 1m 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz COOLING FUNCTION SPL dB A LINE Super ...

Страница 7: ...9 Connected part ø16 O D 193 60 19 155 295 167 5 187 5 209 21 5 41 3 299 5 145 145 335 45 166 5 208 61 78 42 740 760 178 5 250 335 5 14 5 51 100 11 96 166 80 5 50 10 66 505 189 INDOOR UNIT INSTALLATION PLATE 11 26 OBLONG HOLE 11 20 OBLONG HOLE WALL HOLEø65 IN CASE OF LEFT LEFT BACK OR LEFT UNDER PIPING USING SPACER MIN 120 5mm MIN 44 5mm MIN 14mm MIN 30mm MIN 20mm AIR IN PIPING DRAIN HOSE INSTALLA...

Страница 8: ...esleme kablosu kullanın NOTLAR 1 Dış ünite elektronik kablolaması için dış ünite elektronik kablo devre şemasını referans alınız SİGORTA T3 15AL250V FAN MOTORU VARİSTÖR ODA SICAKLIK TERMİSTÖRÜ BORU SICAKLIK TERMİSTÖRÜ ANA BORU SICAKLIK TERMİSTÖRÜ YARDIMCI DIŞ ÜNİTEYE Terminal bloğu Konektör PARÇA ADI TERMİNAL BLOĞU SEMBOL SEMBOL KANAT MOTORU YATAY ÜST KANAT MOTORU YATAY ALT RESİSTÖR PARÇA ADI OBH8...

Страница 9: ...K TERMİSTÖRÜ BORU SICAKLIK TERMİSTÖRÜ ANA BORU SICAKLIK TERMİSTÖRÜ YARDIMCI TERMİNAL BLOĞU NOTLAR 1 Dış ünite elektronik kablolaması için dış ünite elektronik kablo devre şemasını referans alınız 2 Sadece bakır besleme kablosu kullanın 3 Sembolleri gösterir Terminal bloğu Konektör Detaylar için SERVİS KILAVUZUNA bakınız Arıza durumunun detaylı çözümü için arıza geri çağırma fonksiyonu ile kontrol ...

Страница 10: ... TERMİSTÖRÜ BORU SICAKLIK TERMİSTÖRÜ ANA BORU SICAKLIK TERMİSTÖRÜ YARDIMCI TERMİNAL BLOĞU NOTLAR 1 Dış ünite elektronik kablolaması için dış ünite elektronik kablo devre şemasını referans alınız 2 Sadece bakır besleme kablosu kullanın 3 Sembolleri gösterir Terminal bloğu Konektör Detaylar için SERVİS KILAVUZUNA bakınız Arıza durumunun detaylı çözümü için arıza geri çağırma fonksiyonu ile kontrol e...

Страница 11: ...efrigerant pipe ø9 52 with heat insulator Refrigerant pipe ø6 35 with heat insulator Indoor coil thermistor RT12 main Indoor coil thermistor RT13 sub Refrigerant flow in cooling Refrigerant flow in heating Unit mm MSZ AP15VG MSZ AP15VGK MSZ AP20VG MSZ AP20VGK REFRIGERANT SYSTEM DIAGRAM 7 OBH838B ...

Страница 12: ...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 automatically according to the memory However it takes at least 3 minutes for the compressor to ...

Страница 13: ...t or iii loss or damage to any system or product which is caused by or arises from connection to and or use of any third party Wi Fi interface or any third party Wi Fi service with Mitsubishi Electric equipment For the latest information regarding MELCloud from Mitsubishi Electric Corporation please visit www MELCloud com NOTE When the Wi Fi interface is reset to the factory default ALL the conﬁgu...

Страница 14: ...ton TIME WEEKLY TIMER set buttons TIME TIMER set buttons Increase time Decrease time RESET button i save button VANE control button NIGHT MODE button Lid Slide the lid down to open the remote controller Slide it down further to get to the weekly timer buttons Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state The following indication...

Страница 15: ...1 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 9 4 HEAT OPERATION 1 Press OFF ON stop operate button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select HEAT mode with Operation select butto...

Страница 16: ...amp blinks as shown in the figure below In this case please set all the indoor units to the same operation mode When indoor unit starts the operation while the defrosting of outdoor unit is being done it takes a few minutes max 10 min utes to blow out the warm air In HEAT operation though indoor unit that does not operate may get warm or the sound of refrigerant flowing may be heard they are not m...

Страница 17: ...esult energy can be saved To cancel this operation select a different mode or press one of the following buttons in ECONO COOL operation ECONO COOL VANE control button 9 7 TIMER OPERATION 1 How to set the time 1 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 th...

Страница 18: ...N A maximum of 4 ON or OFF timers can be set for individual days of the week A maximum of 28 ON or OFF timers can be set for a week NOTE The simple ON OFF timer setting is available while the weekly timer is on In this case the ON OFF timer has priority over the weekly timer the weekly timer operation will start again after the simple ON OFF timer is complete When the weekly timer is set temperatu...

Страница 19: ...en the weekly timer is turned OFF 2 Checking weekly timer setting 1 Press button to enter the weekly timer setting mode blinks 2 Press or buttons to view the setting of the particular day or number 3 Press button to exit the weekly timer setting NOTE When all days of the week are selected to view the settings and a different setting is included among them will be displayed 9 9 NIGHT MODE OPERATION...

Страница 20: ...ess the emergency operation switch during normal operation Operation mode COOL HEAT Set temperature 24 C Fan speed Medium Horizontal vane Auto The operation mode is indicated by the Operation Indicator lamp as following Operation Indicator lamp EMERGENCY COOL EMERGENCY HEAT STOP Lit Not lit 9 10 i save OPERATION 1 How to set i save operation 1 Press OFF ON stop operate button 2 Select COOL HEAT EC...

Страница 21: ...op 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 3 Troubleshooting procedure 1 Check if the OPERATION INDICATOR lamp on the indoor unit is blinking ON and OFF to indicate an abnormality To make sure check how many...

Страница 22: ...on by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller The outdoor unit is abnormal Check the blinking pattern and identify the abnormal point by referring to the outdoor unit failure mode table Refer to outdoor unit service manual Make sure to check at least 2 consecutive blinking cycles 3 Repair the failure parts After repairing ...

Страница 23: ...ristics of the main indoor coil ther mistor the sub indoor coil thermistor 10 7 3 time blink 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 blink 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not emitted during the 12 seconds the indoor fa...

Страница 24: ...e blink Cause Outdoor unit Trouble of thermistor in outdoor unit Left lamp 7 time blink Cause Outdoor unit Trouble of outdoor con trol system Left lamp 14 time blink or more Cause Outdoor unit Other ab normality Indoor Out door unit Trouble of thermistors Start Refer to 10 6 How to check mis wiring and serial signal error Check room temperature thermistor and indoor coil thermis tor Refer to 10 7 ...

Страница 25: ...r power P C board and the indoor electronic control P C board If the indoor outdoor wire is connected and the power supplied hold down the RESET switch of Wi Fi interface for 2 seconds The com munication with the air conditioner is normal if the UNIT LED starts blinking It may take a few minutes to blinking If the problem persists check the cable and the connector of Wi Fi interface If all else fa...

Страница 26: ...al Check the stop valve 6 Outdoor thermistors Left lamp blinks 6 time blink 2 5 second OFF The outdoor thermistors short or open circuit during the compressor operation Refer to Check of outdoor thermistor Refer to outdoor unit service manual 7 Outdoor control sys tem Left lamp blinks 7 time blink 2 5 second OFF It cannot properly read data in the nonvolatile memory of the inverter P C board or th...

Страница 27: ...ode Refer to outdoor unit service manual 10 5 TROUBLESHOOTING CRITERION OF MAIN PARTS MSZ AP15VG MSZ AP15VGK MSZ AP20VG MSZ AP20VGK Part name Check method and criterion Figure Room temperature thermistor RT11 Indoor coil thermistor RT12 RT13 Measure the resistance with a tester Refer to 10 7 Test point diagram and voltage Indoor electronic control P C board for the chart of thermistor Indoor fan m...

Страница 28: ...en CN211 and 2 Measure the voltage between CN211 and If more than 12 seconds passes after the emergency operation switch is pressed the voltage measured at 2 above goes 0 V DC although the indoor P C board is normal Does the voltage between CN211 and on the indoor electronic control P C board rise to the range of 2 to 6 V DC within 12 seconds after the emergency operation switch is pressed Replace...

Страница 29: ...CN301 No 2 and No 3 when the remote controller button is pressed Is the voltage approximately 4 V DC 5 V DC No Replace the indoor electronic control P C board Replace the receiver P C board Is a signal transmitted from a remote controller of a different device Yes Stop the transmission of signal between the different device and its remote controller No 2 1 If the inverter fluorescent light is turn...

Страница 30: ... Measure the resistance between CN211 and of indoor fan motor connector 1 2 Yes Is the resistance 1MΩ or more Replace the fuse F11 and the indoor fan motor 3 No Replace the fuse F11 3 Measure the resistance of resis tor R111 on the indoor electronic control P C board Is the resistance of resistor R111 approxi mately 4 Ω No Replace the indoor electronic control P C board and the indoor fan motor Re...

Страница 31: ...ously 6 minutes after the emergency operation starts No Does the outdoor LED light up Replace the indoor electronic control P C board Yes Does the outdoor LED blink 6 times Yes Confirm that the thermostat is OFF and wiring is not loose No Does DC 6 V or more occur between indoor terminal block S2 and S3 Yes Replace the outdoor inverter P C board 1 No Replace the indoor electronic control P C board...

Страница 32: ...he 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 outd...

Страница 33: ...restart function cut the jumper wire to JR77 Refer to 8 3 MSZ AP15VG E1 ET1 ER1 MSZ AP20VG E1 ET1 ER1 Indoor electronic control P C board 10 7 TEST POINT DIAGRAM AND VOLTAGE Display P C board Receiver P C board SW P C board Resistor R111 Room temperature thermistor RT11 Indoor coil thermistor RT12 RT13 Temperature C Resistance kΩ Fuse F11 T3 15AL250V Varistor NR11 230 V AC Emergency operation swit...

Страница 34: ...estart function cut the jumper wire to JR77 Refer to 8 3 MSZ AP15VG E2 ET2 MSZ AP15VGK E1 ET1 ER1 MSZ AP20VG E2 ET2 MSZ AP20VGK E1 ET1 ER1 Indoor electronic control P C board Display P C board Receiver P C board SW P C board Resistor R111 Room temperature thermistor RT11 Indoor coil thermistor RT12 RT13 Temperature C Resistance kΩ Fuse F11 T3 15AL250V Varistor NR11 230 V AC Emergency operation swi...

Страница 35: ...l the terminal while pushing the locking lever Hold the sleeve and pull out the terminal slowly Connector Sleeve Locking lever Detaching method of the terminal with locking mechanism The terminal which has the locking mechanism can be detached as shown below There are following 2 types of the terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out C...

Страница 36: ...onnect the following connectors on the electronic control P C board CN211 Indoor fan motor CN201 Terminal block CN112 Indoor coil thermistor CN151 Horizontal vane motor CN109 Receiver P C board 9 Pull out the electronic control P C board from the electrical box 10 Remove the earth wire connected to the indoor elec tronic control P C board from the electrical box Photo 3 NOTE MSZ AP15VG and MSZ AP2...

Страница 37: ...er to section 1 and the corner box 2 Remove the V A clamp Photo 2 3 Remove the electrical cover Photo 3 4 Disconnect the following connector on the electronic control P C board CN151 Horizontal vane motor 5 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly 5 Removing the horizontal vane motor 1 Remove the nozzle assembly refer to section 4 2 Remove the screw of the le...

Страница 38: ...o remove it 8 Remove the motor bed together with fan motor and motor band 9 Release the hooks of the motor band Remove the motor band Pull out the indoor fan motor 10 Remove the screws fixing the left side of the heat exchanger Photo 10 11 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 5 mm gap is provided betwee...

Страница 39: ...he panel 1 Remove the horizontal vanes 2 Remove the screw caps of the panel Remove the screws 3 Unhook the lower part of the panel 4 Hold the lower part of both ends of the panel and pull it slightly toward you and then remove the panel by pushing it upward Photo 1 39 Screws of the panel Front panel Horizontal vanes A OBH838B ...

Страница 40: ...hes and remove the display P C board Photo 6 9 Open the SW holder and pull out the SW P C board 10 Disconnect the following connectors on the electronic control P C board CN211 Indoor fan motor CN201 Terminal block CN112 Indoor coil thermistor CN151 Horizontal vane motor CN109 Receiver P C board 11 Pull out the electronic control P C board from the electrical box 12 Remove the earth wire connected...

Страница 41: ...er to section 1 and the corner box 2 Remove the V A clamp Photo 2 3 Remove the electrical cover Photo 3 4 Disconnect the following connector on the electronic control P C board CN151 Horizontal vane motor 5 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly 5 Removing the horizontal vane motor 1 Remove the nozzle assembly refer to section 4 2 Remove the screw of the le...

Страница 42: ...to remove it 7 Remove the motor bed together with fan motor and motor band 8 Release the hooks of the motor band Remove the motor band Pull out the indoor fan motor 9 Remove the screws fixing the left side of the heat exchanger Photo 10 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 5 mm gap is provided betwee...

Страница 43: ...ked position Do not pull the lead wire when removing the indoor coil thermistor Holder shape Clip shape When fixing the indoor coil thermistor to the clip shape holder shape part the lead wire should point down 1 Set the indoor coil thermistor in the center of the clip shape part 2 Check the marked mounting position 3 Mount the clip shape part Position and procedure for mounting the clip shape par...

Страница 44: ...KU TOKYO 100 8310 JAPAN Copyright 2019 MITSUBISHI ELECTRIC CORPORATION Issued Nov 2020 No OBH838 REVISED EDITION B Issued Dec 2019 No OBH838 REVISED EDITION A Published Apr 2019 No OBH838 Made in Japan Specifications are subject to change without notice ...

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