Mitsubishi Electric CITY MULTI PFLY Series Technical & Service Manual Download Page 38

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OCH728A

OPERATING PROCEDURE

PHOTOS/FIGURES

4. Removing the room temperature thermistor (TH21)

(1) Remove the electrical box cover. (See Photo 1 and 2)

(2) Disconnect the connector CN20 (Red) from the indoor

controller board.

(3) Remove the room temperature thermistor with its holder.

(See Photo 4)

Photo 3

Photo 4

5. Removing the indoor controller board (I.B)

(1) Remove the electrical box cover. (See Photo 1 and 2)

(2) Disconnect the connectors:

CNMF (White) for fan motor

CNV (White) for vane motor

CN5Y (White) for motor for i-see Sensor (Option)

CN4Z (White) for sensor for i-see Sensor (Option)

CN90 (White) for signal receiver (Option)

CNP (White) for drain pump

CN4F (White) for float switch

CN44 (White) for thermistor (TH22/TH23)

CN60 (White) for LEV

CN01 (Black) for Indoor/Outdoor connecting line

CN3C (Blue) for Indoor/Outdoor transmission

Disconnect the connectors for optional parts, if any.

(3) Disconnect the lead wire connected to the TB5 on the

indoor controller board.

TB5: M-NET transmission connecting wire

(4) For the unit controlled with the wireless remote controller,

disconnect the lead wire connected to the TB15 on the

indoor controller board.

(5) Remove the indoor controller board (3 holders/4 hooks).

(See Photo 5)

Photo 5

Holders

Hooks

Electrical box fixing

screws (M5 ×10)

Electrical box fixing

screws (M5 × 10)

CN20

Room temperature

detection thermistor

Indoor

controller board

Electrical box

Thermistor holder

Thermistor (TH21)

Summary of Contents for CITY MULTI PFLY Series

Page 1: ...VEM E PLFY M25VEM ET PLFY M25VEM E UK PLFY M25VEM ET UK PLFY M25VEM E TH PLFY M25VEM ET TH PLFY M32VEM E PLFY M32VEM ET PLFY M32VEM E UK PLFY M32VEM ET UK PLFY M32VEM E TH PLFY M32VEM ET TH PLFY M40VEM E PLFY M40VEM ET PLFY M40VEM E UK PLFY M40VEM ET UK PLFY M40VEM E TH PLFY M40VEM ET TH PLFY M50VEM E PLFY M50VEM ET PLFY M50VEM E UK PLFY M50VEM ET UK PLFY M50VEM E TH PLFY M50VEM ET TH PLFY M63VEM ...

Page 2: ...anifold Torque wrench Gas leak detector Charge hose Tools for R32 R410A Contamination inside refrigerant piping can cause deterio ration of refrigerant oil etc If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc Ventilate the ro...

Page 3: ... in case of brazing the refrigerant pipes 12 When performing brazing work be sure to ventilate the room sufficiently Make sure that there are no hazardous or flammable materials nearby When performing the work in a closed room small room or similar location make sure that there are no refriger ant leaks before performing the work If refrigerant leaks and accumulates it may ignite or poisonous gase...

Page 4: ...he Refrigeration Equipment Where electrical components are being changed they shall be fit for the purpose and to the correct specification At all times the manufacturer s maintenance and service guidelines shall be followed If in doubt consult the manufacturer s technical department for assistance The following checks shall be applied to installations using flammable refrigerants The charge size ...

Page 5: ...e conventional procedures shall be used However for flammable refrigerants it is important that best practice is followed since flammability is a considera tion The following procedure shall be adhered to remove refrigerant purge the circuit with inert gas evacuate purge again with inert gas open the circuit by cutting or brazing The refrigerant charge shall be recovered into the correct recovery ...

Page 6: ... transferring refrigerant into cylinders ensure that only appropriate refrig erant recovery cylinders are employed Ensure that the correct number of cylinders for holding the total system charge are available All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant i e special cylinders for the recovery of refrigerant Cylinders shall be complete with ...

Page 7: ...e of 5 09MPa G or over 3 Electronic weighing scale 4 Gas leak detector Use the detector for R134a R407 R410A or R32 5 Adaptor for reverse flow check Attach on vacuum pump 6 Refrigerant charge base 7 Refrigerant cylinder R32 or R410A refrigerant Cylinder with syphon 8 Refrigerant recovery equipment Electronic weighing scale Unit 2 PARTS NAMES AND FUNCTIONS Drain pipe Filter Vane Gas pipe Liquid pip...

Page 8: ...me depending on the screen When the backlight is off pressing any button turns the backlight on and does not perform its function except for the ON OFF button 6 ON OFF lamp This lamp lights up in green while the unit is in operation It blinks while the remote controller is starting up or when there is an error 7 Function button F1 Main display Press to change the operation mode Menu screen The but...

Page 9: ...for explanation Fri Mode Temp Fan Room Cool Set temp Auto Basic mode Fri Cool Mode Temp Fan Set temp Auto 2 1 5 6 7 8 9 0 1 3 9 4 2 3 4 5 6 7 2 1 5 4 Appears when the Weekly timer is enabled 5 Appears while the units are operated in the energy saving mode Will not appear on some models of indoor units 6 Appears while the outdoor units are operated in the silent mode This indication is not availabl...

Page 10: ... Manual vane angle ON OFF timer Auto return Clock Main Sub Temp range Auto OFF timer Schedule Daylight saving time Clock Administrator password Operation locked 3D i see Sensor High power Vane Louver Vent Lossnay Comfort Timer Energy saving Basic setting Display setting Operation setting Restriction Weekly timer OU silent mode Timer menu Main display Display details Contrast Brightness Language se...

Page 11: ...ame input Function setting Error history Maintenance password Dealer information input Error information Test run menu Maintenance information Filter information Cleaning Settings menu Check menu Other menu Auto descending panel Descending operation Self check Descending adjustment Remote controller check Continue from the previous page Not all functions are available on all models of indoor units...

Page 12: ...which priority is given to quiet operation of outdoor units over temperature control Set the Start Stop times for each day of the week Select the desired silent level from Normal Middle and Quiet Night setback 1 Use to make Night setback settings Select Yes to enable the setting and No to disable the setting The temperature range and the start stop times can be set Energy saving Restriction Temp r...

Page 13: ... code error source refrigerant address unit model manufacturing number contact information dealer s phone number can be displayed The unit model manufacturing number and contact information need to be registered in advance to be displayed Filter information Use to check the filter status The filter sign can be reset Cleaning Auto descending panel Use to lift and lower the auto descending panel Opt...

Page 14: ...peed setting Set Temperature buttons Set Time button Sets the time Airflow button Changes up down airflow direction Mode button Changes operation mode Timer ON button Timer OFF button OFF ON button Fan Speed button Changes fan speed SET SEND button CANCEL button Up Down buttons Menu button i see button Reset button Remote controller display Battery replacement indicator Transmission area Not avail...

Page 15: ...424 459 494 530 424 459 494 530 459 494 530 565 459 494 530 600 459 494 565 636 494 530 565 636 Sound pressure level Low Mid2 Mid1 High measured in anechoic room dB A 24 26 27 29 24 26 27 29 26 27 29 31 26 27 29 31 26 27 29 31 28 29 30 32 Insulation material PS Air filter PP honeycomb Protection device Fuse Refrigerant control device LEV Connectable outdoor unit R32 R410A CITY MULTI Diameter of re...

Page 16: ...dB A 28 31 34 37 34 37 39 41 35 39 42 45 Insulation material PS Air filter PP honeycomb Protection device Fuse Refrigerant control device LEV Connectable outdoor unit R32 R410A CITY MULTI Diameter of refrigerant pipe Liquid R32 R410A mm inch 9 52 3 8 Flare 9 52 3 8 Flare 9 52 3 8 Flare Gas R32 R410A mm inch 15 88 5 8 Flare 15 88 5 8 Flare 15 88 5 8 Flare Field drain pipe size mm O D 32 VP 25 Stand...

Page 17: ...nal block TB5 M1 M2 S Rated to 250 V 20 A MA remote controller terminal block TB15 1 2 Rated to 250 V 10 A Refer to WIRING DIAGRAM for the supplied voltage Model name Parts name Symbol PLFY M80VEM E PLFY M80VEM ET PLFY M100VEM E PLFY M100VEM ET PLFY M125VEM E PLFY M125VEM ET Room temperature thermistor TH21 Resistance 0 15 k 10 9 6 k 20 6 3 k 25 5 4 k 30 4 3 k 40 3 0 k Liquid pipe thermistor TH22 ...

Page 18: ...26 27 29 31 28 29 30 32 28 31 34 37 34 37 39 41 35 39 42 45 Sound pressure level dB A Sound pressure level at anechoic room Low Mid2 Mid1 High 1 5 m Measurement location Sound pressure level at anechoic room Low Mid2 Mid1 High Model name Sound pressure level dB A PLFY M20VEM E ET PLFY M25VEM E ET 24 26 27 29 PLFY M32VEM E ET PLFY M40VEM E ET PLFY M50VEM E ET 26 27 29 31 PLFY M63VEM E ET 28 29 30 3...

Page 19: ...NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 μbar BAND CENTER FREQUENCIES Hz 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 μbar BAND CENTER FREQUENCIES Hz 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8...

Page 20: ...t fully closed Pattern 6 2 air outlet fully closed 2 According to the number of air outlets and height of the ceiling to install the unit be sure to set up the switch SW21 on the circuit board to the appropriate setting Correspondence of ceiling heights to the number of air outlets PLFY M20VEM PLFY M25VEM PLFY M32VEM PLFY M40VEM PLFY M50VEM PLFY M63VEM PLFY M80VEM PLFY M100VEM PLFY M125VEM Silent ...

Page 21: ...agnetic switch power relay for duct fan X Auxiliary relay For 12 V DC coil rating 1 0 W or smaller Unit mm Branch duct hole A A A Drain pipe Fresh air intake hole diagram Refrigerant pipe Branch duct hole diagram view from either side 350 100 cutout hole 150 cutout hole 175 burring hole pitch 125 burring hole pitch 100 cutout hole Ceiling Fresh air intake hole A A 4 2 BRANCH DUCT HOLE AND FRESH AI...

Page 22: ...E ET Multi functional casement Standard filter Multi functional casement High efficiency filter Taking air into the unit Multi functional casement Standard filter Multi functional casement High efficiency filter 4 4 FRESH AIR INTAKE AMOUNT STATIC PRESSURE CHARACTERISTICS Q 0 B A C 1 Curve in the graphs Duct characteristics at site Q A E C 2 Q Qa A D 3 Q Designed amount of fresh air intake m3 min A...

Page 23: ...S AND DIMENSIONS PLFY M20VEM E ET PLFY M25VEM E ET PLFY M32VEM E ET PLFY M40VEM E ET PLFY M50VEM E ET PLFY M63VEM E ET PLFY M80VEM E ET PLFY M100VEM E ET PLFY M125VEM E ET Unit mm PLFY M VEM E ET 20 25 32 40 50 63 80 100 125 ...

Page 24: ...24 OCH728A WIRING DIAGRAM 6 PLFY M20VEM E ET PLFY M25VEM E ET PLFY M32VEM E ET PLFY M40VEM E ET PLFY M50VEM E ET PLFY M63VEM E ET PLFY M80VEM E ET PLFY M100VEM E ET PLFY M125VEM E ET ...

Page 25: ... detection thermistor gas TH23 Linear expansion valve Gas pipe Liquid pipe Flare connection Unit mm inch Pipe temperature detection thermistor liquid TH22 Service Ref PLFY M20 25 32 40 50VEM E ET PLFY M63 80 100 125VEM E ET Item Gas pipe 12 7 1 2 15 88 5 8 Liquid pipe 6 35 1 4 9 52 3 8 PLFY M20VEM E ET PLFY M25VEM E ET PLFY M32VEM E ET PLFY M40VEM E ET PLFY M50VEM E ET PLFY M63VEM E ET PLFY M80VEM...

Page 26: ...e Red Purple Black 1 Check if the drain float switch works properly 2 Check if the drain pump works and drains water properly in cooling operation 3 If no water drains confirm that the check code 2502 will not be displayed 10 minutes after the operation starts Note The drain pump for this model is driven by the internal DC so it is not possible to measure the resistance between the terminals Norma...

Page 27: ...stor liquid TH22 Pipe temperature detection thermistor gas TH23 Thermistor R0 15 k 3 Fixed number of B 3480 2 Rt 15exp 3480 0 15 k 10 9 6 k 20 6 3 k 25 5 4 k 30 4 3 k 40 3 0 k Thermistor for lower temperature 1 Operation summary of the linear expansion valve Linear expansion valves open close through the use of a stepping motor after receiving the pulse signal from the indoor con troller board Val...

Page 28: ...oes not light while the signals are output or keeps lighting even after the signals stop Exchange the indoor controller board at drive circuit failure Linear expansion valve mecha nism is locked Motor will idle and make a ticking noise when the motor is operated while the linear expansion valve is locked This ticking sound is the sign of the abnormality Exchange the linear expansion valve Short or...

Page 29: ...fan motor Is the voltage normal Is there contact failure No Yes Yes No Yes Check the operation of fan Complete Fail OK OK Check the operation Is the fuse normal Yes Is the resistance between the terminals of drain pump normal Notes High voltage is applied to the connector CNMF for the fan motor Pay attention to the service Do not pull out the connector CNMF for the motor with the power supply on I...

Page 30: ...g Set for each capacity SW3 Function setting 1 Heat pump Cooling only Cooling only Heat pump Under suspension Initial setting ON OFF 1 2 3 4 5 6 7 8 9 0 2 Refer to Table D below for SW3 5 and SW 3 6 2 3 3D i see Sensor positioning The setting depends on the combination of SW3 3 and SW3 4 Refer to Table B below Before power supply ON 4 5 Vane horizontal angle 1 Second setting 2 First setting 2 Unde...

Page 31: ...al setting ON OFF 1 2 3 4 5 6 2 Setting the ceiling height 3 Setting the number of air outlet Depending on the combination of SW21 3 and SW21 4 Refer to Table E below 4 Setting the number of air outlet 5 Setting for optional parts Option Standard 6 Not used Not used Not used PLFY M20VEM PLFY M25VEM PLFY M32VEM PLFY M40VEM PLFY M50VEM PLFY M63VEM PLFY M80VEM PLFY M100VEM PLFY M125VEM Silent Standar...

Page 32: ...o the table below 2 Wireless remote controller pair number Setting operation Fig 1 A 1 Press the button 1 to stop the air conditioner 2 Press the button 2 3 Check that function No 1 is displayed and then press the button 3 The Screen display setting screen will be displayed Fig 2 Pair No changing operation Fig 2 B 1 Press the button 4 2 Each time the button 4 is pressed the pair No 0 3 changes 3 P...

Page 33: ...tor output 12 V DC pulse CN52 Remote indicator CN51 Centrally controlled CN4Z i see Sensor CN60 Linear expansion valve LEV output 12 V DC pulse output CN44 Pipe temperature thermistor 1 2 Liquid TH22 3 4 Gas TH23 CN4F Drain float switch FS CN20 Room temperature thermistor TH21 CN27 Damper signal output 12 V DC 1 CN4G Auto grille signal output CN90 Connect to the wireless remote controller board W ...

Page 34: ...Special operation 1 Re storage operation Case Obstruction of the raising air intake grille before storage or malfunction of storage detection switch Re storage operation will be performed when the intake grille has been raised the set distance but the storage detection switch is not engaged In this case the operation below will be repeated up to 4 times 10 cm down 30 cm up 10 cm down 30 cm up 2 No...

Page 35: ...2 3 4 5 6 ON OFF 2 SW2 on U B LOWERING DISTANCE SET UP 2 0m 2 4m 1 2m 1 6m Initial setting 1 2 3 4 5 6 ON OFF 1 2 3 4 5 6 ON OFF 1 2 3 4 5 6 ON OFF LOWERING DISTANCE SET UP 3 6m 4 0m 2 8m 3 2m 1 2 3 4 5 6 ON OFF 1 2 3 4 5 6 ON OFF 1 2 3 4 5 6 ON OFF 1 2 3 4 5 6 ON OFF Note 1 Symbols used in wiring diagram above are Connector Terminal block 2 The black square indicates a switch position Note The ac...

Page 36: ...thing on the intake grille Filter is not properly installed Intake grille is not hung with all 4 hooks Because the intake grille has finished lowering to the auto stop position This is the noise made when the string is winded and unwound This is the operational noise for placing the intake grille in securely The speeds of winding each string is slightly different Stop running the air conditioner a...

Page 37: ...ove the filter See Figure 2 Figure 1 2 Removing the air intake grille 1 Slide the knob of air intake grille toward the arrow to open the air intake grille See Figure 1 2 Remove the hook of drop prevention strap from the panel 3 Remove the air intake grille Figure 2 3 Removing the electrical box cover 1 Remove the air intake grille and the filter Refer to procedure 2 2 Loosen the 2 electrical box c...

Page 38: ...iver Option CNP White for drain pump CN4F White for float switch CN44 White for thermistor TH22 TH23 CN60 White for LEV CN01 Black for Indoor Outdoor connecting line CN3C Blue for Indoor Outdoor transmission Disconnect the connectors for optional parts if any 3 Disconnect the lead wire connected to the TB5 on the indoor controller board TB5 M NET transmission connecting wire 4 For the unit control...

Page 39: ...ox 2 hooks Photo 6 Photo 7 Nut and washer Photo 9 7 Removing the turbo fan 1 Remove the electrical box See Photo 3 and refer to procedure 6 2 Remove the bell mouth tapping screw 4 10 2 screws See Photo 6 3 Remove the nut M8 1 and a washer See Photo 7 and 8 4 Remove the turbo fan Note 1 When assembling the turbo fan attach it so that its tabs fit the holes of washer Note 2 Nut tightening torque 4 5...

Page 40: ...e electrical box fixing cover See Photo 1 2 Disconnect the connector for vane motor CNV White Refer to procedure 5 3 Loosen the 4 corner panel fixing screws tapping screw 4 16 See Figure 4 4 Slide the corner panel to the direction of the arrow 1 and remove the corner panel See Figure 4 5 Remove the 4 installation screws M5 28 See Photo 11 6 Release the 2 temporary hanging hooks to remove the grill...

Page 41: ...or TH22 and condenser evaporator temperature thermistor TH23 1 Remove the drain pan Refer to procedure 10 and loos en the 2 clamps of the coil plate See Photo 10 2 Remove the coil plate tapping screw 4 10 2 screws 3 Disconnect the pipe temperature liquid thermistor TH22 and condenser evaporator temperature thermistor TH23 from the holder Photo 14 Drain pan Drain pan fixing screws Drain pan fixing ...

Page 42: ...2 screws 2 hooks 5 Cut the drain pump base and lead wire fixing band See Figure 5 6 Remove the lead wire of the drain pump from the clamp of the drain pump base See Figure 5 7 Remove the drain pump tapping screw 3 screws See Figure 6 Photo 15 Figure 6 Figure 5 Drain pump Float switch Clamp Hose band Float switch fixing screw Drain pump base fixing screws Drain pump base and lead wire fixing band C...

Page 43: ...re 10 2 Remove the piping cover tapping screw 4 10 3 screws 3 Remove the coil plate tapping screw 4 10 2 screws 4 Remove the heat exchanger fixing screws tapping screw 4 10 2 screws 5 Remove the coil support tapping screw 4 10 1 screw each M20 80 1 coil support See photo 17 M100 125 3 coil supports See photo 18 6 Remove the heat exchanger Photo 18 Photo 17 Coil support fixing screw Coil support He...

Page 44: ... 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN CCopyright 2019 MITSUBISHI ELECTRIC CORPORATION Issued Jun 2020 No OCH728 REVISED EDITION A Published Nov 2019 No OCH728 Made in Japan Specifications are subject to change without notice ...

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