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Mitsubishi Electric MSZ-AP15VG, Service Manual, Page: 3 / 34

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Mitsubishi Electric MSZ-AP15VG Service Manual Download Page 3

3

TECHNICAL CHANGES

1

MSZ-AP15VG - 

E1

, 

ET1

, 

ER1

MSZ-AP20VG - 

E1

, 

ET1

, 

ER1

 1. New model

These models are compatible with 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 "Deleting the memorized abnormal condition" described in 10-2.1. 

OBH838A

Summary of Contents for MSZ-AP15VG

Page 1: ...0VG CONTENTS 1 TECHNICAL CHANGES 3 2 PART NAMES AND FUNCTIONS 4 3 SPECIFICATION 5 4 NOISE CRITERIA CURVES 6 5 OUTLINES AND DIMENSIONS 7 6 WIRING DIAGRAM 8 7 REFRIGERANT SYSTEM DIAGRAM 9 8 SERVICE FUNCTIONS 10 9 MICROPROCESSOR CONTROL 11 10 TROUBLESHOOTING 18 11 DISASSEMBLY INSTRUCTIONS 30 Models MSZ AP15VG E1 ET1 ER1 MSZ AP20VG E1 ET1 ER1 OBB838 is void Revision A MSZ AP15 20VG ER1 have been added...

Page 2: ...per 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 Do not perform the work involving the electric parts with wet hands Do not pour water into the electric parts Do...

Page 3: ...he 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 Deleting the memorized abnormal condition described in 10 2 1 OBH838A ...

Page 4: ...ed for left or left rear piping 1 Battery AAA for remote controller 2 MSZ AP15VG MSZ AP20VG 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 Air inlet OBH838A ...

Page 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 SG19C NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb temperature 27 C Wet bulb temper...

Page 6: ... 42 42 NC 10 MSZ AP20VG 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 High FAN SPE...

Page 7: ...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 INSTALLATION PLATE A...

Page 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...

Page 9: ...connection Refrigerant 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 AP20VG REFRIGERANT SYSTEM DIAGRAM 7 OBH838A ...

Page 10: ...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 start runnin...

Page 11: ...button OPERATION SELECT button ECONO COOL button CLOCK SET button WEEKLY TIMER set button TIME TIMER set buttons FORWARD button BACKWARD button RESET button i save button VANE CONTROL button NIGHT MODE button 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 Indi...

Page 12: ...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 STOP OPERATE OFF ON button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select HEAT mode with OPERATION SELECT butto...

Page 13: ...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...

Page 14: ... a result 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 se...

Page 15: ...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...

Page 16: ...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...

Page 17: ...press 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 STOP OPERATE OFF ON button 2 Select COOL HEAT ECON...

Page 18: ... 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 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 ...

Page 19: ...tion 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 repairin...

Page 20: ...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...

Page 21: ...ink on and off at 0 5 sec ond intervals Cause Indoor Outdoor unit Miswiring or trouble of se rial signal Left lamp 2 time blink Cause Indoor unit Trouble of room temperature indoor coil thermistor Left lamp 3 time blink Cause Indoor unit Trouble of indoor fan motor Left lamp 4 time blink Cause Indoor unit Trouble of indoor unit control system Left lamp 5 time blink Cause Outdoor unit Outdoor power...

Page 22: ...urrent protection or startup failure protection within 1 minute after startup Refer to How to check of in verter compressor Refer to outdoor unit service manual 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...

Page 23: ...fy the operation mode Refer to outdoor unit service manual 10 5 TROUBLE CRITERION OF MAIN PARTS MSZ AP15VG MSZ AP20VG 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 motor MF Refer ...

Page 24: ...en CN211 and 2 Measure the voltage between CN211 and If more than 12 seconds passes after 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 EMERGENCY OPERATION switch is pressed Replace the ind...

Page 25: ...N301 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 turne...

Page 26: ...easure 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 Repl...

Page 27: ...nuously 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 boa...

Page 28: ...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...

Page 29: ...sable Auto restart function cut the jumper wire to JR77 Refer to 8 3 MSZ AP15VG MSZ AP20VG 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 switch E O SW S...

Page 30: ...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...

Page 31: ...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...

Page 32: ...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...

Page 33: ...to 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 betwe...

Page 34: ...rmistor NOTE Take care to avoid loss and accidental falling of the clip shape part inside the unit Mount the clip shape part on the marked 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 ...

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