Mitsubishi Electric PLFY-P08NEMU-E Technical & Service Manual Download Page 41

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OPERATING PROCEDURE

PHOTOS/FIGURES

12.

Removing the heat exchanger

(1) Remove the intake grille and the filter. (See Procedure 1.)

(2) Remove the electrical box cover. (See Procedure 2.)

(3) Disconnect the connectors. (Refer to Procedure 4.)

(4) Remove the grille. (See Procedure 8.)

(5) Remove the electrical box. (See Procedure 5.)

(6) Remove the 2 bell mouth fixing screws (tapping screw:

4 ×10) to remove the bell mouth. (See Photo 6.)

(7) Remove the drain pan. (See Procedure 9.)

(8)

Remove the 3 piping cover fixing screws (tapping

screw: 4 ×10) to remove the piping cover. (See Photo

17.)

(9)

Remove the 2 coil plate fixing screws (tapping screw:

4 ×10) to remove the coil plate. (See Photo 17.)

(10)

Remove the heat exchanger fixing screws (tapping

screw: 4 ×10). (See Photo 17.)

(11)

Remove the coil support fixing screws (tapping screw:

4 ×10) to remove the coil support(

). (See Photo 17.)

• PLFY-P08/12/15/18/24/30NEMU-E: 1 coil support

• PLFY-P36/48NEMU-E: 3 coil supports

(12)

Remove the heat exchanger. (See Photo 17.)

Photo 17

■

PLFY-P08/12/15/18/24/30NEMU-E

■

PLFY-P36/48NEMU-E

Heat exchanger

fixing screw

Coil support

Heat exchanger

Piping cover

Coil plate

Coil support

fixing screw

Heat exchanger

fixing screw

Coil support

fixing screw

Heat exchanger

Coil plate

Piping cover

OCH611D

Summary of Contents for PLFY-P08NEMU-E

Page 1: ...REFRIGERANT SYSTEM DIAGRAM 21 8 MICROPROCESSOR CONTROL 22 9 TROUBLESHOOTING 29 10 DISASSEMBLY PROCEDURE 37 PLFY P08NEMU E PLFY P12NEMU E PLFY P15NEMU E PLFY P18NEMU E PLFY P24NEMU E PLFY P30NEMU E PLFY P36NEMU E PLFY P48NEMU E INDOOR UNIT Model name indication for MAIN UNIT PARTS CATALOG OCB611 R410A INDOOR UNIT FOR VRF SYSTEM March 2018 No OCH611 Model name indication for GRILLE REVISED EDITION D...

Page 2: ...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 Do not use the existing refrigerant piping The old refrigerant and lubricant in the existing piping contains a large amount of chlorine which may cause the lubricant deterioration of the ne...

Page 3: ...tanding 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 768 7 PSIG 5 3M Pa G or over 2 Charge hose Only for R410A Use pressure performance ...

Page 4: ...mm 120 120 19 120 70 14 5 LCD Full Dot LCD Partial Dot LCD Backlight Energy saving Energy saving operation schedule Automatic return to the preset temperature Restriction Setting the temperature range restriction Function Operation lock function Weekly timer ON OFF timer High Power Manual vane angle Some functions may not be available depending on model types Wired remote controller function The f...

Page 5: ...ll appear When the backlight is off pressing any button 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 d...

Page 6: ...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 Weekly timer is enabled Appears while the units are operated in the energy saving mode Appears when the built in thermistor on the ...

Page 7: ...ossnay High power Weekly timer Restriction Maintenance Initial setting ON OFF timer Auto Off timer Temp range Operation lock 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 Menu structure Filter...

Page 8: ...0 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 4 energy save operation patterns can be set for each day Time can be set in 5 minute increments Energy saving rate can be set to a value from 0...

Page 9: ...ut LOSSNAY setting This setting is required only when the operation of City Multi units is interlocked with LOSSNAY units Check Error history Display the error history and execute delete error history Self check Error history of each unit can be checked via the remote controller Maintenance password Use to change the maintenance password Remote controller check When the remote controller does not ...

Page 10: ...ode 4 digits will blink Check the error status stop the operation and consult your dealer icon appears while the unit is operated in the energy save mode Note All icons are displayed for explanation purpose icon appears when Operation lock setting is effective icon appears when indoor unit functions are set up Refer to the Installation Manual Fan speed icon Vane icon icon appears when the power is...

Page 11: ...15 0 17 0 217 233 250 283 459 494 565 636 13 0 14 0 16 0 18 0 217 233 267 300 m min L s Sound pressure level Low Mid2 Mid1 High measure in anechoic room dB A 27 29 30 31 208 230 V 27 29 30 31 208 230 V 28 29 30 31 208 230 V 28 30 31 32 208 230 V dB A dB A Insulation material PS Air filter PP honeycomb long life filter anti bacterial type Protection device Fuse Refrigerant control device LEV Connec...

Page 12: ... 500 567 742 918 1 060 1 236 21 0 26 0 30 0 35 0 350 433 500 583 m min L s Sound pressure level Low Mid2 Mid1 High measure in anechoic room dB A 28 31 34 37 208 230 V 28 32 35 38 208 230 V 35 38 41 44 208 230 V 36 39 42 45 208 230 V dB A dB A Insulation material PS Air filter PP honeycomb long life filter anti bacterial type Protection device Fuse Refrigerant control device LEV Connectable outdoor...

Page 13: ...LFY P18NEMU E PLFY P24NEMU E PLFY P30NEMU E PLFY P36NEMU E 27 29 30 31 27 29 30 31 28 31 34 37 28 32 35 38 35 38 41 44 Sound pressure level dB A Sound pressure level in anechoic room Low Mid2 Mid1 High 5 ft 1 5m Measurement location PLFY P08NEMU E PLFY P48NEMU E 36 39 42 45 28 29 30 31 28 30 31 32 OCH611D ...

Page 14: ...uencies Hz PLFY P18NEMU E External Static Pressure 0Pa 0 00in WG Power Source 208 230V 60Hz 10 0 15 0 20 0 25 0 30 0 35 0 40 0 45 0 50 0 55 0 60 0 65 0 70 0 NC 60 NC 50 Octave band pressure level dB 0dB 20μPa Approximate minimum audible limit on continuous noise NC 40 NC 30 NC 20 High Middle 60Hz Middle2 60Hz Low 60Hz 60Hz 63 125 250 500 1k 2k 4k 8k Octave band center frequencies Hz PLFY P24NEMU E...

Page 15: ...rmistor Gas pipe thermistor Vane motor Drain pump Drain float switch Linear expansion valve PLFY P08NEMU E PLFY P12NEMU E PLFY P18NEMU E PLFY P15NEMU E PLFY P24NEMU E PLFY P30NEMU E PLFY P36NEMU E PLFY P48NEMU E Room temperature thermistor Fuse Indoor controller board Fan motor Power supply terminal block Transmission terminal block MA remote controller terminal block 8 pole OUTPUT 50W 8 pole OUTP...

Page 16: ...FY P08 12 15 18 24 30NEMU E PLFY P36 48NEMU E Silent Standard High ceiling Silent Standard High ceiling SW21 1 SW21 2 SW21 1 SW21 2 SW21 1 SW21 2 SW21 1 SW21 2 SW21 1 SW21 2 SW21 1 SW21 2 OFF ON OFF OFF ON OFF OFF ON OFF OFF ON OFF 4 direction SW21 3 OFF SW21 4 ON 3 direction SW21 3 OFF SW21 4 OFF 2 direction SW21 3 ON SW21 4 OFF 8 2 ft 2 5 m 8 9 ft 2 7 m 9 8 ft 3 0 m 8 9 ft 2 7 m 9 8 ft 3 0 m 10 ...

Page 17: ... 0W or smaller Unit in 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 ø150 cut out hole ø175 burring hole pitch ø4 29 32 ø125 burring hole pitch ø3 15 16 ø100 cut out hole Ceiling Fresh air intake hole A A 6 7 32 158 15 11 32 390 13 25 32 350 3 15 16 100 3 15 16 100 6 3 32 155 6 9 16 167 3 15 16...

Page 18: ...0 200 CFM CMM 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 CMM CFM A Static pressure loss of fresh air intake duct system with airflow amount Q Pa in W G o10 2 B Forced static pressure at air condi tioner inlet with airflow amount Q Pa in W G o10 2 C Static pressure of booster fan with airflow amount Q Pa in W G o10 2 D Sta...

Page 19: ... TO SOCKET OR ATTACHED FLEXIBLE HOSE CONNECTING BY VINYL CHLORIDE SERIES ADHESIVE THE BOTTOM OF SUSPENSION BOLT THE BOTTOM OF MOVE EYE SENSOR 17 5 0 0 3 16 2 9 32 58 1 31 32 TO 2 3 4 50 70 5 1 2 140 6 11 16 170 4 1 8 105 7 15 32 190 21 32 A 1 9 16 40 B 2 3 8 60 24 23 32 628 GRILLE CELLING Φ6 7 8 Φ175 BURRING HOLE PITCH SELF TAP 4 SCREWS 4 PLACES BRANCH DUCT HOLE Φ5 29 32 Φ150 CUTTING OUT HOLE BRAN...

Page 20: ...model For the detail refer the table 1 and 2 7 Make sure to turn off the indoor and the outdoor units before replacing indoor controller board 8 is the switch position 1 Use copper supply wires 1 Utilisez des fils d alimentation en cuivre CN27 CN32 CN51 CN52 SW2 SW3 SW4 F1 MF MV DP FS TB2 TB5 TB15 TH22 TH23 LEV W B RU BZ LED1 LED2 SW1 SW2 POWER SUPPLY TRANSMISSION MA REMOTE CONTROLLER PIPE TEMP DE...

Page 21: ...ipe Liquid pipe PLFY P08 12 15 18NEMU E PLFY P24 30 36 48NEMU E 5 8 15 88 3 8 9 52 Item Model Unit in mm 1 4 6 35 1 2 12 7 Distributor Strainer 100mesh LEV Pipe temperature detection thermistor liquid TH22 PLFY P08NEMU E PLFY P12NEMU E PLFY P15NEMU E PLFY P18NEMU E PLFY P24NEMU E PLFY P30NEMU E PLFY P36NEMU E PLFY P48NEMU E OCH611D ...

Page 22: ...e compressor but an open close commands to the linear expansion valve The compressor stops only when the thermostatic control for all the indoor units connected to the same outdoor unit turns OFF 1 2 Anti freeze control Condition to detect When the pipe temperature detection thermistor liquid TH22 detects 32 F or less in 16 minutes from thermo ON the anti freeze control initiates and the unit ente...

Page 23: ...ected that the float switch is ON for 15 seconds In the air Detected that the float switch is OFF for 15 seconds ON OFF 15 s 15 s 15 s 1 min 30 s 1 min 30 s Float SW In the water In the air In the water Error postponement Drain pump abnormal 4 Vane up down vane change 1 The initial vane setting for COOL mode will be the horizontal position 2 Vane position Horizontal Downward A Downward B Downward ...

Page 24: ... Dry thermo ON Room temperature Set temperature 2 F Dry thermo OFF Room temperature Set temperature Room temperature 3 minutes passed since starting operation Dry thermo ON time min Dry thermo OFF time min Thermostat signal Room temperature T1 Over 64 F ON T1 83 F 9 3 83 F T1 79 F 7 3 79 F T1 75 F 5 3 75 F T1 3 3 OFF Unconditional 3 10 Below 64 F Dry thermo OFF 1 2 Anti freeze prevention control N...

Page 25: ...in the water when the float switch control judges the sensor is in the water 2 2 Float switch control Float switch control judges whether the sensor is in the air or in the water by turning the float switch ON OFF In the water Detected that the float switch is ON for 15 seconds In the air Detected that the float switch is OFF for 15 seconds Operates as it would in COOL operation 3 Vane up down van...

Page 26: ...rks 1 Temperature adjustment function 1 1 Determining temperature adjustment function Function to prevent restarting for 3 minutes Room temperature Set temperature 2 F Thermo ON Room temperature Set temperature Thermo OFF 2 Fan By the remote controller setting switch of 4 speeds Auto Type Fan speed notch 4 speeds Auto type When Auto is set fan speed is changed depending on the value of T Set tempe...

Page 27: ...on changes to OFF the indoor fan operates in Extra low 2 4 Heat defrosting mode The indoor fan stops 3 Drain pump 3 1 Drain pump control The drain pump turns ON for the specified amount of time when any of the following conditions has been satisfied 1 ON for 3 minutes after the operation mode is switched from COOL or DRY to another operation mode FAN 2 ON for 6 minutes after the float switch is su...

Page 28: ...ssed 2 COOL mode HEAT mode Room temperature Set temperature 3 F or 3 minutes have passed 3 COOL mode Operates as it would in COOL operation 4 HEAT mode Operates as it would in HEAT operation 8 6 WHEN UNIT IS STOPPED CONTROL MODE Control Mode Control Details Remarks 1 Drain pump 1 1 Drain pump control The drain pump turns ON for the specified amount of time when any of the following conditions has ...

Page 29: ... 9 5 4 9 Red White 5 2 0 7 5 2 7 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 motor of controller board so it is not possible to measure th...

Page 30: ...F 3 2 k Thermistor for lower temperature 9 1 2 Linear expansion valve 1 Operation summary of the linear expansion valve Linear expansion valve opens closes through stepping motor after receiving the pulse signal from the indoor controller board Valve position can be changed in proportion to the number of pulse signals Connection between the indoor controller board and the linear expansion valve 1 ...

Page 31: ...ght 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 other indoor ...

Page 32: ...rouble of the indoor controller board Replace the indoor controller board Trouble of the fan motor Replace the defective fan motor Does the voltage repeat 0 and 15 V DC Replace the indoor controller board Is the voltage normal Is there contact failure Yes 1 2 No Yes No Yes Power supply check Remove the connector CNMF Measure the voltage in the indoor controller circuit board TEST POINT 1 VDC betwe...

Page 33: ...1 2 3 4 5 6 P12 Capacity SW2 SW2 P15 P18 P24 P30 P36 ON OFF 1 2 3 4 5 6 P08 ON OFF 1 2 3 4 5 6 P48 Capacity Before power supply ON Indoor controller board Initial setting Set for each capacity SW3 Function setting 1 Heat pump Cooling only Cooling only Heat pump Under suspension Indoor controller board Initial setting Set for each capacity ON OFF 1 2 3 4 5 6 7 8 9 0 4 Refer to the Table C below for...

Page 34: ...ard 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 the Table E below 4 Setting the number of air outlet 5 Setting for optional parts Option Standard 6 Not used Not used Not used Continue to the next page Table E PLFY P08 12 15 18 24 30NEMU E PLFY P36 48NEMU E Silent Standard High ceiling ...

Page 35: ...ton using a pointed implement Check that the remote controller s display has stopped before continuing MODEL SELECT blinks and the model No 3 digits appears steadily lit 2 Press the MINUTE button twice The pair No appears flashing 3 Press the TEMP buttons to select the pair No to set 4 Press the SET button using a pointed implement The set pair is displayed steadily lit for 3 seconds then disappea...

Page 36: ...t 208 230 V CN51 Centrally control 1 2 Control signal 12 V DC pulse input 1 3 4 Operation indicator 12 V DC 3 3 5 Malfunction indicator 12 V DC 3 CN52 Remote indicator 1 2 Status lamp 12 V DC 1 Fan motor output SW1 5 OFF Thermostat ON SW1 5 ON 1 3 Cooling Dry status lamp 12 V DC 1 1 4 Heating status lamp 12 V DC 1 CN4Z i see Sensor sensor CN60 Linear expansion valve LEV out put 12 V DC pulse outpu...

Page 37: ...re 2 3 Disconnect the connectors CNMF WH for fan motor CNV WH for vane motor CN5Y WH for i see Sensor motor CN4Z WH for i see Sensor sensor CN90 WH for wireless remote controller board CNP WH for drain pump CN4F WH for float switch CN44 WH for pipe temperature detection thermistor liquid CND BK for indoor controller board power supply Disconnect the connectors for optional parts if any 4 Disconnec...

Page 38: ...sher Photo 9 6 Removing the turbo fan 1 Remove the electrical box See Photo 3 and refer to 5 2 Remove the bell mouth tapping screw 4 10 2 screws See Photo 6 With nut and square washer 3 Remove the nut M8 1 and a square washer See Photo 7 and 8 4 Remove the turbo fan With nut and washer 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 ...

Page 39: ...emoving the grille 1 Remove the intake grille and the filter See Procedure 1 2 Remove the electrical box cover See Procedure 2 3 Disconnect the connector CNV WH 4 Loosen the 4 corner panel fixing screw tapping 4 16 see Figure 4 5 Slide the corner panel to the direction of the arrow 1 and remove the corner panel 6 Remove the 4 installation screws M5 28 See Photo 11 7 Release the 2 temporary hanging...

Page 40: ...rs which are inserted into the hold ers installed to the thin copper pipe Photo 14 11 Removing the drain pump DP and float switch FS 1 Remove the intake grille and the filter See Procedure 1 2 Remove the electrical box cover See Procedure 2 3 Disconnect the connectors Refer to Procedure 4 4 Remove the grille See Procedure 8 5 Remove the electrical box See Procedure 5 6 Remove the 2 bell mouth fixi...

Page 41: ...ve the piping cover See Photo 17 9 Remove the 2 coil plate fixing screws tapping screw 4 10 to remove the coil plate See Photo 17 10 Remove the heat exchanger fixing screws tapping screw 4 10 See Photo 17 11 Remove the coil support fixing screws tapping screw 4 10 to remove the coil support 1 See Photo 17 PLFY P08 12 15 18 24 30NEMU E 1 coil support PLFY P36 48NEMU E 3 coil supports 12 Remove the ...

Page 42: ...ed Aug 2017 No OCH611 REVISED EDITION C Issued Jun 2017 No OCH611 REVISED EDITION B Issued Jun 2016 No OCH611 REVISED EDITION A Published Mar 2016 No OCH611 Made in Japan Specifications are subject to change without notice HEAD OFFICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN ...

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