Mitsubishi Electric City Multi PLFY Series Page 36 Technical & Service Manual Download

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OPERATING PROCEDURE

PHOTOS & ILLUSTRATIONS

9. Removing the panel

(1) Remove the 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

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

grille. (See Photo 12)

Figure 4

Corner panel

①

Corner panel

Close-up

Screw

Grille

Photo 11

Photo 12

10. Removing the drain pan

(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 drain pan (screw M5×10: 4 screws).

Photo 13

Installation

screw

Temporary hanging hook

Drain pan

fixing screws

Drain pan

fixing screws

OCH657

Summary of Contents for City Multi PLFY Series

Page 1: ...NDOOR UNIT Model name indication for MAIN UNIT Model name indication for GRILLE Indoor unit Model names Service Ref PLFY P20VEM E PLFY P20VEM E UK PLFY P25VEM E PLFY P25VEM E UK PLFY P32VEM E PLFY P32VEM E UK PLFY P40VEM E PLFY P40VEM E UK PLFY P50VEM E PLFY P50VEM E UK PLFY P63VEM E PLFY P63VEM E UK PLFY P80VEM E PLFY P80VEM E UK PLFY P100VEM E PLFY P100VEM E UK PLFY P125VEM E PLFY P125VEM E UK G...

Page 2: ...hange and the efficiency will be lowered 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 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 ...

Page 3: ...h the cylinder of syphon stood vertically Refrigerant is charged from liquid phase Electronic weighing scale Unit 3 Service tools Use the below service tools as exclusive tools for R410A refrigerant No Tool name Specifications 1 Gauge manifold Only for R410A Use the existing fitting specifications UNF1 2 Use high tension side pressure of 5 3MPa G or over 2 Charge hose Only for R410A Use pressure p...

Page 4: ...4 2 PARTS NAMES AND FUNCTIONS Drain pipe Filter Vane Gas pipe Liquid pipe Air outlet Air intake Intake grille i see Sensor Option Signal receiver Option 2 1 Indoor unit OCH657 ...

Page 5: ...turns the backlight on and it will stay lit for a certain period of time depending on the screen Backlit LCD 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 ON OFF lamp Main display Press to change the operation mode Main menu Press to move the cursor down Function button F1 Main display Press to decrease te...

Page 6: ...on mode is centrally controlled Appears when the preset temperature is centrally controlled Appears when the filter reset function is centrally controlled Indicates when filter needs maintenance Current room temperature appears here 1 Room temperature See the Installation Manual Appears when the buttons are locked Appears when the On Off timer or Night setback function is enabled Appears when the ...

Page 7: ...imer Restriction Maintenance Initial setting ON OFF timer Auto Off timer Temp range Operation lock Manual vane angle Main Sub Timer Main display Contrast Display details Auto mode Administrator password Language selection Service Input maintenance info Function setting Lossnay City Multi only Check Self check Maintenance password Remote controller check Test run Clock Auto descending panel Menu st...

Page 8: ...units to operate at the preset temperature after performing energy save operation for a specified time period Time can be set to a value from 30 and 120 in 10 minute increments This function will not be valid when the preset temperature ranges are restricted Schedule Set the start stop times to operate the units in the energy save mode for each day of the week and set the energy saving rate Up to ...

Page 9: ... desired language Service Test run Select Test run from the Service menu to bring up the Test run menu Test run Drain pump test run Input maintenance info Select Input maintenance Info from the Service menu to bring up the Maintenance information screen The following settings can be made from the Maintenance Information screen Model name input Serial No input Dealer information input Function sett...

Page 10: ...tting 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 available We...

Page 11: ...echoic 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 R410A CITY MULTI Diameter of refrigeant pipe Liquid R410A mm inch 6 35 1 4 Flare 6 35 1 4 Flare 6 35 1 4 Flare 6 35 1 4 Flare 6 35 1 4 Flare 9 52 3 8 Flare Gas R410A mm inch 12 7 1 2 Fl...

Page 12: ...ter PP honeycomb Protection device Fuse Refrigerant control device LEV Connectable outdoor unit R410A CITY MULTI Diameter of refrigeant pipe Liquid R410A mm inch 9 52 3 8 Flare 9 52 3 8 Flare 9 52 3 8 Flare Gas R410A mm inch 15 88 5 8 Flare 15 88 5 8 Flare 15 88 5 8 Flare Field drain pipe size mm inch O D 32 VP 25 Standard attachment Document Accessory Installation Manual Instruction Book Remark O...

Page 13: ...S Rated to 250V 20A MA remote controller terminal block TB15 1 2 Rated to 250V 10A Refer to WIRING DIAGRAM for the supplied voltage Service Ref Parts name Symbol PLFY P80VEM E UK PLFY P100VEM E UK PLFY P125VEM E UK Room temperature thermistor TH21 Resistance 0 15k 10 9 6k 20 6 3k 25 5 4k 30 4 3k 40 3 0k Liquid pipe thermistor TH22 Resistance 0 15k 10 9 6k 20 6 3k 25 5 4k 30 4 3k 40 3 0k Gas pipe t...

Page 14: ...E UK PLFY P50VEM E UK PLFY P63VEM E UK PLFY P80VEM E UK PLFY P100VEM E UK PLFY P125VEM E UK PLFY P20VEM E UK PLFY P25VEM E UK 24 26 27 29 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 OCH657 ...

Page 15: ...C 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 8000 APP...

Page 16: ... Pattern 4 1 air outlet 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 P20 25 32 40 50 63 80VEM E PLFY P100 125VEM E Silent Standard High ceiling Silent Standard...

Page 17: ...witch power relay for duct fan X Auxiliary relay For 12 V DC coil rating 1 0W 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 cut out hole 175 burring hole pitch 125 burring hole pitch 100 cut out hole Ceiling Fresh air intake hole A A 4 2 BRANCH DUCT HOLE AND FRESH AIR INTAKE...

Page 18: ...0 125VEM E UK Multi functional casement High efficiency filter Taking air into the unit Multi functional casement Standard filter Multi functional casement High efficiency filter Taking air into the unit 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 Static ...

Page 19: ...19 19 5 OUTLINES AND DIMENSIONS PLFY P20VEM E UK PLFY P25VEM E UK PLFY P32VEM E UK PLFY P40VEM E UK PLFY P50VEM E UK PLFY P63VEM E UK PLFY P80VEM E UK PLFY P100VEM E UK PLFY P125VEM E UK Unit mm OCH657 ...

Page 20: ...54321 OFF ON OFF ON OFF ON OFF ON OFF ON SW22 4 3 2 1 012 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 3 1 CN90 WH CN4F WH CN4Z WH CN32 WH 1 5 1 5 1 5 SWE ON OFF tº TH21 FS tº TH23 tº TH22 CN60 WH BU F1 Refer to table 1 TO NEXT INDOOR UNIT PULL BOX FUSE 16A BREAKER 16A L N 1 2 CN27 RD TO OUTDOOR UNIT BC CONTROLLER ME REMOTE CONTROLLER 24 30V DC TO MA REMOTE CONTROLLER 8 7 13V ...

Page 21: ...on thermistor gas TH23 Linear expansion valve Gas pipe Liquid pipe Flare connection Unit mm inch Pipe temperature detection thermistor liquid TH22 PLFY P20VEM E UK PLFY P25VEM E UK PLFY P32VEM E UK PLFY P40VEM E UK PLFY P50VEM E UK PLFY P63VEM E UK PLFY P80VEM E UK PLFY P100VEM E UK PLFY P125VEM E UK Service Ref PLFY P20 25 32 40 50VEM E UK PLFY P63 80 100 125VEM E UK Item Gas pipe 12 7 1 2 15 88 ...

Page 22: ...he connector then measure the resistance valve with a tester At the coil temperatures of 10 to 30 C Linear expansion valve LEV Refer to 8 1 2 Linear expansion valve 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 aft...

Page 23: ...uid 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 Valve posit...

Page 24: ... light while the signals are output or keeps lighting even after the signals stop Countermeasures Exchange the indoor con troller board at drive circuit failure Linear expansion valve mechanism is locked Valve does not close completely Wrong connection of the connector or contact failure To check the linear expansion valve operate the indoor unit in fan mode and at the same time operate the other ...

Page 25: ...or Is the voltage normal Is there contact failure No Yes Yes No Yes Check the operation of fan END Fail OK END 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 connecter CNMF for the motor with the power supply on It causes...

Page 26: ...spension Indoor controller board 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 Under suspension 6 Vane horizontal angle 2 Third setting 2 Depends on SW3 5 7 Cha...

Page 27: ... E below Under suspension Indoor controller board Initial 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 P20 25 32 40 50 63 80VEM E PLFY P100 125VEM E Low ceiling Standa...

Page 28: ... 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 Press the button 3...

Page 29: ...ut 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 B LED1 M...

Page 30: ... 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 load d...

Page 31: ... 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 act...

Page 32: ...rille 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 and try again After re...

Page 33: ...ure 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 cover fixing screws M4 10 approx...

Page 34: ...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...

Page 35: ...r mount Note When re attaching the motor mount make sure that the thicker end faces the motor shaft 8 Removing the fan motor MF 1 Remove the turbo fan See Photo 8 and refer to pro cedure 7 2 Remove the lead cover tapping screw 4 10 2 screws See Photo 10 3 Loosen the 2 clamps 4 Remove the 3 nuts and washers M5 5 Remove the fan motor 6 Remove the 3 rubber mounts Figure 3 Partial cross section Note W...

Page 36: ...rner 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 grille See Photo 12 Figure 4 Corner panel Corner panel Close up Screw Grille Photo 11 Photo 12 10 Removing the drain pan 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 drain...

Page 37: ...pan Refer to procedure 10 2 Cut the hose band and remove the hose 3 Loosen the clamp of the drain pump 4 Remove the drain pump tapping screw 4 10 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 Figure 6 Photo 15 Fi...

Page 38: ...ove 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 P20 80 1 coil support See photo 17 P100 125 3 coil supports See photo 18 6 Remove the heat exchanger Photo 18 Photo 17 Coil support fixing screw Coil support Heat exchange...

Page 39: ...39 OCH657 ...

Page 40: ...ICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN CCopyright 2016 MITSUBISHI ELECTRIC CORPORATION Published Dec 2016 No OCH657 Made in Japan Specifications are subject to change without notice ...

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