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Mitsubishi Electric MSZ-EF18VE2B Service Manual Download Page 13

13

Indoor

heat

exchanger

Flared connection

Room temperature
thermistor
RT11

Flared connection

Refrigerant pipe ø9.52 (

MSZ-EF18/22/25/35/42

)

ø12.7 (

MSZ-EF50

)

(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

REFRIGERANT SYSTEM DIAGRAM

7

MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW
MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB
MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES
MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W
MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B
MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S MSZ-EF42VE2S MSZ-EF50VE2S

OBH589D

Summary of Contents for MSZ-EF18VE2B

Page 1: ...SZ EF50VEB E1 MSZ EF18VES E1 MSZ EF22VES E1 MSZ EF25VES E1 MSZ EF35VES E1 MSZ EF42VES E1 MSZ EF50VES E1 MSZ EF18VE2W E1 ER1 MSZ EF22VE2W E1 ER1 MSZ EF25VE2W E1 ER1 MSZ EF35VE2W E1 ER1 MSZ EF42VE2W E1 ER1 MSZ EF50VE2W E1 ER1 MSZ EF18VE2B E1 ER1 MSZ EF22VE2B E1 ER1 MSZ EF25VE2B E1 ER1 MSZ EF35VE2B E1 ER1 MSZ EF42VE2B E1 ER1 MSZ EF50VE2B E1 ER1 MSZ EF18VE2S E1 ER1 MSZ EF22VE2S E1 ER1 MSZ EF25VE2S E1 ...

Page 2: ...nly Never use any refrigerant other than that specified Doing so may cause a burst an explosion or fire when the unit is being 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...

Page 3: ...ES E1 MSZ EF50VE2S E1 1 Front panel has been changed 2 Panel assembly has been changed 3 Remote controller has been changed MSZ EF18VE2W ER1 MSZ EF22VE2W ER1 MSZ EF25VE2W ER1 MSZ EF35VE2W ER1 MSZ EF42VE2W ER1 MSZ EF50VE2W ER1 MSZ EF18VE2B ER1 MSZ EF22VE2B ER1 MSZ EF25VE2B ER1 MSZ EF35VE2B ER1 MSZ EF42VE2B ER1 MSZ EF50VE2B ER1 MSZ EF18VE2S ER1 MSZ EF22VE2S ER1 MSZ EF25VE2S ER1 MSZ EF35VE2S ER1 MSZ ...

Page 4: ...ote controller 2 Wireless remote controller 1 Felt tape For left or left rear piping 1 Soft dry cloth VEB type only 1 Operation indicator lamp Remote control receiving section Emergency operation switch Horizontal vane Air inlet Air filter Nano platinum filter Air cleaning filter Electrostatic anti allergy enzyme filter option Heat exchanger Front panel Air outlet Remote controller MSZ EF18VEW MSZ...

Page 5: ...less remote controller 1 Felt tape For left or left rear piping 1 Soft dry cloth VEB type only 1 Air cleaning filter 2 Remote controller MSZ EF18VE2W MSZ EF22VE2W MSZ EF25VE2W MSZ EF35VE2W MSZ EF42VE2W MSZ EF50VE2W MSZ EF18VE2B MSZ EF22VE2B MSZ EF25VE2B MSZ EF35VE2B MSZ EF42VE2B MSZ EF50VE2B MSZ EF18VE2S MSZ EF22VE2S MSZ EF25VE2S MSZ EF35VE2S MSZ EF42VE2S MSZ EF50VE2S Operation indicator lamp Remo...

Page 6: ...irection 5 Airfl ow Cooling Super High m3 h 630 High 498 Med 378 Low 276 Silent 240 Heating Super High m3 h 714 762 High 534 Med 372 Low 276 Silent 240 Sound level Cooling Super High dB A 42 High 36 Med 29 Low 23 24 Silent 21 Heating Super High dB A 45 46 High 37 38 Med 29 30 Low 24 Silent 21 Fan speed Cooling Super High rpm 1 200 High 990 Med 800 Low 630 Silent 570 Heating Super High rpm 1 330 1 ...

Page 7: ...oling Super High m3 h 618 660 High 534 558 Med 462 474 Low 396 408 Silent 348 Heating Super High m3 h 762 792 High 594 666 Med 468 540 Low 378 438 Silent 330 384 Sound level Cooling Super High dB A 42 43 High 39 40 Med 35 36 Low 31 33 Silent 28 30 Heating Super High dB A 48 49 High 41 43 Med 35 37 Low 30 33 Silent 28 30 Fan speed Cooling Super High rpm 1 180 1 240 High 1 050 1 080 Med 930 950 Low ...

Page 8: ...NE Super High FAN SPEED HEATING 42 46 NC 10 MSZ EF35VEW MSZ EF35VEB MSZ EF35VES 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 SPEED HEATING 42 45 NC 10 NOISE CRITERIA CURVES 4 MSZ EF18VE2W MSZ EF22VE2W MSZ EF25VE2W MSZ ...

Page 9: ...URE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz COOLING FUNCTION SPL dB A LINE Super High FAN SPEED HEATING 43 49 NC 10 MSZ EF50VEW MSZ EF50VEB MSZ EF50VES 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 SPEED...

Page 10: ...52 18 22 25 35 42 ø12 7 50 Drain hose Insulation ø28 O D Connected part ø16 O D OUTLINES AND DIMENSIONS 5 MSZ EF18VEW MSZ EF22VEW MSZ EF25VEW MSZ EF35VEW MSZ EF42VEW MSZ EF50VEW MSZ EF18VEB MSZ EF22VEB MSZ EF25VEB MSZ EF35VEB MSZ EF42VEB MSZ EF50VEB MSZ EF18VES MSZ EF22VES MSZ EF25VES MSZ EF35VES MSZ EF42VES MSZ EF50VES OBH589D ...

Page 11: ...EF35VE2B MSZ EF42VE2B MSZ EF50VE2B MSZ EF18VE2S MSZ EF22VE2S MSZ EF25VE2S MSZ EF35VE2S MSZ EF42VE2S MSZ EF50VE2S Unit mm Piping Insulation ø37 O D Liquid line ø6 35 0 5 m Flared connection ø6 35 Gas line ø9 52 0 43 m Flared connection ø9 52 18 22 25 35 42 ø12 7 50 Drain hose Insulation ø28 O D Connected part ø16 O D OBH589D ...

Page 12: ...B MSZ EF42VEB MSZ EF50VEB MSZ EF18VES MSZ EF22VES MSZ EF25VES MSZ EF35VES MSZ EF42VES MSZ EF50VES MSZ EF18VE2W MSZ EF22VE2W MSZ EF25VE2W MSZ EF35VE2W MSZ EF42VE2W MSZ EF50VE2W MSZ EF18VE2B MSZ EF22VE2B MSZ EF25VE2B MSZ EF35VE2B MSZ EF42VE2B MSZ EF50VE2B MSZ EF18VE2S MSZ EF22VE2S MSZ EF25VE2S MSZ EF35VE2S MSZ EF42VE2S MSZ EF50VE2S OBH589D ...

Page 13: ...erant flow in heating Unit mm REFRIGERANT SYSTEM DIAGRAM 7 MSZ EF18VEW MSZ EF22VEW MSZ EF25VEW MSZ EF35VEW MSZ EF42VEW MSZ EF50VEW MSZ EF18VEB MSZ EF22VEB MSZ EF25VEB MSZ EF35VEB MSZ EF42VEB MSZ EF50VEB MSZ EF18VES MSZ EF22VES MSZ EF25VES MSZ EF35VES MSZ EF42VES MSZ EF50VES MSZ EF18VE2W MSZ EF22VE2W MSZ EF25VE2W MSZ EF35VE2W MSZ EF42VE2W MSZ EF50VE2W MSZ EF18VE2B MSZ EF22VE2B MSZ EF25VE2B MSZ EF35...

Page 14: ...tion put back the batteries then 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 No 2 unit Solder J1 Same as at left Same as at left No 3 unit Solder J2 Same as at left No 4 unit Solder both J1 and J2 How to set the remote controller exclusively for particular indoor unit...

Page 15: ...ome 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 JR07 IC171 CN104 CN112 BZ Indoo...

Page 16: ...on RESET button i save button VANE CONTROL button MSZ EF18VEW MSZ EF22VEW MSZ EF25VEW MSZ EF35VEW MSZ EF42VEW MSZ EF50VEW MSZ EF18VEB MSZ EF22VEB MSZ EF25VEB MSZ EF35VEB MSZ EF42VEB MSZ EF50VEB MSZ EF18VES MSZ EF22VES MSZ EF25VES MSZ EF35VES MSZ EF42VES MSZ EF50VES MSZ EF18VE2W MSZ EF22VE2W MSZ EF25VE2W MSZ EF35VE2W MSZ EF42VE2W MSZ EF50VE2W MSZ EF18VE2B MSZ EF22VE2B MSZ EF25VE2B MSZ EF35VE2B MSZ ...

Page 17: ...SZ EF22VE2W MSZ EF25VE2W MSZ EF35VE2W MSZ EF42VE2W MSZ EF50VE2W MSZ EF18VE2B MSZ EF22VE2B MSZ EF25VE2B MSZ EF35VE2B MSZ EF42VE2B MSZ EF50VE2B MSZ EF18VE2S MSZ EF22VE2S MSZ EF25VE2S MSZ EF35VE2S MSZ EF42VE2S MSZ EF50VE2S Signal transmitting section Operation display section Temperature buttons OPERATE STOP ON OFF button Indication of remote controller model is on back FAN SPEED CONTROL button OPERA...

Page 18: ...R lamp of the indoor unit turns on with a beep tone 2 Select HEAT mode with OPERATION SELECT button 3 Press TEMPERATURE buttons TEMP or 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 don...

Page 19: ...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 c When standby mode only during multi system operation starts or finishes 4 VANE AUTO mode In VANE AUTO mode the microprocessor a...

Page 20: ...N TIMER button To release OFF timer press OFF TIMER button TIMER is cancelled and the display of set time disappears Example 1 The current time is 8 00 PM The unit turns off at 11 00 PM and on at 6 00 AM OFF timer and ON timer can be used in combination The timer of the set time that is reached first will operate first and display shows the order of OFF timer and ON timer operation PROGRAM TIMER E...

Page 21: ...ll days can be selected 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 temperature cannot be set to 10 C The weekly timer operation and i save operation cannot be used together 1 How to se...

Page 22: ...ng 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 4 Press button to complete and transmit the weekly timer setting which was blink ing goes out and the current time will be displayed 9 9...

Page 23: ...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...

Page 24: ...n 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 Lead wiring Housing point Incorrect Correct TROUBLESHOOTING 10 NOTE 1 If RESET button is not pressed the remote controller may not ope...

Page 25: ... is displayed with the remote controller headed towards the indoor unit Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted 4 Release the failure mode recall function according to Releasing the failure mode recall function mentioned above Yes Blinks No OFF NOTE 1 Make sure to release the failure mode recall function after it is set up otherwise the unit cannot oper...

Page 26: ...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 ...

Page 27: ... Run operation means the operation within 30 minutes af ter EMERGENCY OPERATION switch is pressed Refer to outdoor unit service manual Left lamp Flash on and off at 0 5 sec ond intervals Cause Indoor Outdoor unit Miswiring or trouble of serial signal Left lamp 2 time flash Cause Indoor unit Trouble of room temperature indoor coil thermistor Left lamp 3 time flash Cause Indoor unit Trouble of indoo...

Page 28: ...vercurrent 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 6 Outdoor thermistors Left lamp flashes 6 time flash 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...

Page 29: ...EB MSZ EF35VEB MSZ EF42VEB MSZ EF50VEB MSZ EF18VES MSZ EF22VES MSZ EF25VES MSZ EF35VES MSZ EF42VES MSZ EF50VES MSZ EF18VE2W MSZ EF22VE2W MSZ EF25VE2W MSZ EF35VE2W MSZ EF42VE2W MSZ EF50VE2W MSZ EF18VE2B MSZ EF22VE2B MSZ EF25VE2B MSZ EF35VE2B MSZ EF42VE2B MSZ EF50VE2B MSZ EF18VE2S MSZ EF22VE2S MSZ EF25VE2S MSZ EF35VE2S MSZ EF42VE2S MSZ EF50VE2S Part name Check method and criterion Figure Room temper...

Page 30: ...pressed the voltage measured at 2 above goes 0 VDC although the indoor P C board is normal 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 Replace the indoor fan motor Yes No The indoor fan motor error has occurred and the indoor fan repeats 12 second ON and 30 second OFF 3 times and then stops ...

Page 31: ...tart type within the range of 1 m 2 Yes No Reinstall the unit away from lights Attach a filter on receiving part Replace the indoor electronic control P C board Including the receiver 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 ...

Page 32: ...11 3 Measure the resistance of reactor L111 on the indoor power P C board No No Replace the indoor power P C board and the indoor fan motor Replace the indoor electronic control P C board Measure the resistance of the vane motor coil Refer to 10 5 Short circuit Replace the vane motor and the indoor electronic control P C board 1 The fan motor connector s lead wire is red whereas is black 2 Connect...

Page 33: ...or electronic control P C board No Does the indoor OPERATION INDICATOR lamp left blink continuously 6 minutes after the emergency operation starts No Does the outdoor LED light up Replace the indoor electronic control P C board Replace the indoor power P C board Yes Yes Does the outdoor LED blink 6 times Yes Confirm that the thermostat is OFF and wiring is not loose No Does DC 6V or more occur bet...

Page 34: ...ick blinking 3 Yes No Lighted or not lighted Replace the inverter P C board or the outdoor electronic control P C board 2 2 Be careful of the residual voltage of smoothing capacitor Is there amplitude of 10 to 20 VDC between indoor terminal block S2 and S3 Confirmation of serial signal Yes Check the wiring If there are any error of the indoor outdoor connecting wire such as the damage of the wire ...

Page 35: ...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 36: ...C Resistance kΩ Indoor electronic control P C board Indoor power P C board Fuse F11 Varistor NR11 Indoor fan motor CN211 325 VDC GND high voltage DC 15 VDC 3 6 VDC 0 or 15 VDC Connector to terminal block CN201 Connector to indoor electronic control P C board CN202 Receiver board Display board Switch board Reactor L111 5 VDC 12 VDC GND Timer short mode point JPG JPS Refer to 8 1 To disable Auto res...

Page 37: ... power P C board Fuse F11 Varistor NR11 Indoor fan motor CN211 325 VDC GND high voltage DC 15 VDC 3 6 VDC 0 or 15 VDC Connector to terminal block CN201 Connector to indoor electronic control P C board CN202 Receiver board Display board Switch board Reactor L111 5 VDC 12 VDC GND Timer short mode point JPG JPS Refer to 8 1 To disable Auto restart function cut the Jumper wire to JR77 Refer to 8 4 Eme...

Page 38: ...d of the panel and hold the lower part of the left end of the panel 5 Pull the panel slightly toward you and then remove the panel by pushing it upward Photo 1 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 Pull the terminal while pushing the locking lever Hold the sleeve and pull out the terminal slowly...

Page 39: ...ndoor outdoor connecting wire 3 Remove the indoor electrical box Refer to 2 4 Remove the earth wire connected to the electrical box from the indoor power P C board 5 Disconnect the following connectors Indoor electronic power P C board CN201 Terminal block CN202 To the indoor electronic control P C board 6 Remove the indoor power P C board 7 Disconnect the following connectors Indoor electronic co...

Page 40: ...play P C board holder 6 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly 7 Remove the vane motors Refer to 5 Photo 4 5 Removing the horizontal vane motor 1 Remove the nozzle assembly Refer to 4 2 Remove the screws of the vane motor unit cover and pull out the vane motor unit 3 Remove the screws of the vane motor unit 4 Disconnect the connector from the vane motor 5 R...

Page 41: ...d the motor band 7 Release 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 Photo 5 9 Remove the screws fixing the left side and the upper right side of the heat exchanger Photo 7 Photo 8 10 Lift the heat exchanger and pull out ...

Page 42: ... shape part Position and procedure for mounting the clip shape part Copyright 2010 MITSUBISHI ELECTRIC CORPORATION Distributed in Mar 2014 No OBH589 REVISED EDITION D Distributed in Jan 2014 No OBH589 REVISED EDITION C Distributed in Nov 2012 No OBH589 REVISED EDITION B Distributed in Mar 2011 No OBH589 REVISED EDITION A Distributed in Nov 2010 No OBH589 Made in Japan New publication effective Mar...

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