TECHNICAL & SERVICE MANUAL
Contents
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5. Upper and lower flaps 7 Open completely Temporary holding tabs Temporary holding tabs Screw cover Figure 8 Indoor unit Ceiling surface No gaps between the indoor unit and the grille OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS 2 Removing the electrical parts box Photo 2 Claw in middle Nozzle Electrical parts 1 Remove the panel 2 Remove the address board cover 3 Remove the electrical parts cover 4 Disconnect the connectors of fan motor vane motor drain pump room temperature thermistor pipe temperature thermistor Liquid Gas condenser evaporator temperature thermistor and drain sensor on the electrical controller board 5 Disconnect the lead wire and earth wire from terminal Drain pan block 6 Remove the electrical parts box Photo 3 3 Removing the nozzle Photo 4 Note when the nozzle is removed The insulation material white which prevents water m D drop is mounted to the side of vane motor Remove the TL insulation material before removing nozzle See Figure 4 After completing the service re mount the insulation material as before as shown in right figure After service mount the double layer insulation without fail The hard material side should be faced toward the nozzle See Figure 4 Room temperature thermistor 1 Remove the panel 2 Remove the roo
6. 10 7 REFRIGERANT SYSTEM DIAGRAM 14 8 MICROPROCESSOR CONTROL 15 9 22 10 DISASSEMBLY PROCEDURE 31 11 RoHS 9 35 m CITY MULTI 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 unit breakdown or accidents caused by failure to follow the instructions 1 TECHNICAL CHANGES PMFY PO6NBMU ER4 PMFY PO8NBMU ER4 PMFY P12NBMU ER4 PMFY P12NBMU ER5 PMFY P15NBMU ER4 PMFY P15NBMU ER5 INDOOR CONTROLLER BOARD I B has been changed S W version up PMFY PO6NBMU ER5 PMFY PO8NBMU ER5 L1 PMFY PO6NBMU ER3 PMFY PO8NBMU ER3 PMFY P12NBMU ER3 PMFY P15NBMU ER3 1 DRAIN PIPE has been changed PMFY PO6NBMU ER4 PMFY PO8NBMU ER4 PMFY P12NBMU ER4 PMFY P15NBMU ER4 2 JOINT SOCKET FOR DRAIN PIPE has been added PMFY PO6NBMU E 2 PMFY PO8NBMU E 2 PMFY P12NBMU E 2 PMFY P15NBMU E 2 E SN PMFY PO6NBMU ER3 PMFY PO8NBMU ER3 PMFY P12NBMU ER3 PMFY P15NBMU ER3 CONTROLLER BOARD has been changed It is
7. 9 4 TEST POINT DIAGRAM 9 4 1 Indoor controller board PMFY POGNBMU E PMFY POSNBMU E PMFY P12NBMU E PMFY P15NBMU E PMFY PO6NBMU E PMFY POSNBMU E PMFY P12NBMU E PMFY P15NBMU E CN32 sw2 SW3 Connector SW4 Capacity setting Function setting Remote switch Model selection CN27 Connector Damper 12VDC a CN6V Vane motor output MV 12VDC pulse output Drain pump output CN52 DP Remote indicator Between to Status lamp 12VDC O t 208 230V AC Fan motor output SW1 5 OFF i Thermostat ON SW1 5 ON ENO DC Od d lamp D z 0 9 Heating status lamp 9 7718 terminal block TB2 12VDC O Power supply for 55 indoor controller CN51 board connecting Centrally control Tu wire Control signal eft Between to 12VDC pulse input 208 230 56 9 4 Operation indicator FUSE 12VDC 6A 250V Malfunction indicator 1 a 12VDC B Is e FAN CN41 6758 cr Fan motor output HA terminal A CN60 Eg Linear expansion ra valve output LEV 12VDC pulse output CN20 B Room temperature cm e OMIT af CN21 sl Pipe temperature 28 thermistor Liquid TH22 CN29 Pipe temperature Men LED1 thermistor Gas ven TN len 1670 8091 Power supply TH23 Indoor unit 20
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11. Line flow fan x 1 250 280 300 320 0 0 028 Fan x No 270 300 340 370 Air flow 3 230 250 280 300 static pressure Fan motor output Insulator Polyethylene sheet Air filter PP honey comb fabric 1 2 1 4 PVC pipe VP 20 connectable 32 34 36 37 7 Gas side Liquid side Field drain pipe size 1 O D 33 35 37 39 Noise level 3 27 30 33 35 Product weight Note 1 Rating conditions Cooling Indoor 80 F W B 67 F outdoor 95 F W B 75 F Heating Indoor 70 F outdoor 47 F W B 43 F Note 2 The number indicated in is for the grille 3 Air flow and the noise level are indicated as Low Medium2 Medium1 High OC344F 5 4 2 ELECTRICAL PARTS SPECIFICATIONS Service Ref Parts name PMFY POGNBMU E PMFY POBNBMU E PMFY P12NBMU E PMFY P15NBMU E PMFY POGNBMU E PMFY PO8BNBMU E PMFY P12NBMU E PMFY P15NBMU E PMFY PO6NBMU E 2 PMFY PO8NBMU E 2 PMFY P12NBMU E 2 PMFY P15NBMU E 2 PMFY PO6NBMU ER3 PMFY PO8BNBMU ER3 PMFY P12NBMU ER3 PMFY P15NBMU ER3 PMFY PO6NBMU ER4 PMFY POBNBMU ER4 PMFY P12NBMU ER4 PMFY P15NBMU ER4 PMFY POGNBMU ER5 PMFY PO8BNBMU ER5 PMFY P12NBMU ER5 PMFY P15NBMU ER5 Room temperature thermistor Resistance 30 F 15 8kQ 50 F 9 6kO 70 F 6 0kQ 80 F 4 8kO 90 F 3 9kO 100 F 3 2kO Liquid pipe thermistor Resistance 30 F 15 8kQ 50 F 9 6kO 70 F 6
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13. DISASSEMBLY PROCEDURE PMFY PO6NBMU E PMFY PO6NBMU E PMFY PO6NBMU E 2 PMFY PO6NBMU ER3 PMFY PO6NBMU ER4 PMFY PO6NBMU ER5 PMFY PO8NBMU E PMFY POSNBMU E PMFY PO8NBMU E 2 PMFY PO8NBMU ER3 PMFY PO8NBMU ER4 PMFY PO8NBMU ER5 PMFY P12NBMU E PMFY P12NBMU E PMFY P12NBMU E 2 PMFY P12NBMU ER3 PMFY P12NBMU ER4 PMFY P12NBMU ER5 PMFY P15NBMU E PMFY P15NBMU E PMFY P15NBMU E 2 PMFY P15NBMU ER3 PMFY P15NBMU ER4 PMFY P15NBMU ER5 Be careful when removing heavy parts PHOTOS amp ILLUSTRATIONS Photo 1 OPERATING PROCEDURE 1 Removing the grille Opening the air intake grille 1 Press the PUSH of the air intake grille See Figure 1 2 Put your fingers on the both ends of nut of the air intake grille and put it down after the grille clicked Air intake grille Air outlet gt grille a Removing the air intake grille 1 Press the PUSH of the air intake grille and pull down the both ends of nut with your fingers after the grille clicked See Figure 1 2 Pull out the handle of air intake grille strongly toward you See Figure 2 3 Draw the string of the air intake grille to prevent the air intake grille from dropping See Figure 3 Air filter PUSH SA Figure 1 Checks before setting the grille in place 1 Before installing the grille make sure the indoor unit is square with
14. 0 0002 bar 70 60 50 40 30 20 APPROXIMATE TH RESHOLD OF I7 Nd HEARING FOR CONTINUOUS NOISE OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB I 1 i 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz OC341F PMFY P08 12NBMU E PMFY P08 12NBMU E PMFY P08 12NBMU E tig PMFY P08 12NBMU ER3 PMFY P08 12NBMU ER4 275 5 PMFY P08 12NBMU ER5 90 80 0 0002 ubar 70 60 50 40 30 20 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB UNIT CEILING 5ft MICROPHONE inch mm Unit SENS 91 MNANE 190 REN HE e l N 00904 77 auj eweg m eued N
15. Louver display Indicates the action of the swing louver Does not appear if the louver is not running Power On indicator Indicates that the power is on 4 4 SPECIFICATION 4 1 SPECIFICATIONS Service ref Item PMFY PO6NBMU E 2 PMFY PO6NBMU ER4 5 PMFY PO8NBMU E PMFY P08NBMU E PMFY PO8NBMU E 2 PMFY PO8NBMU ER3 PMFY PO8NBMU ER4 PMFY P08NBMU ER5 PMFY P12NBMU E PMFY P12NBMU E PMFY P12NBMU E 2 PMFY P12NBMU ER3 PMFY P12NBMU ER4 PMFY P12NBMU ER5 PMFY P15NBMU E PMFY P15NBMU E PMFY P15NBMU E 2 PMFY P15NBMU ER3 PMFY P15NBMU ER4 PMFY P15NBMU ER5 Single phase 208 230V 60Hz 8 000 12 000 9 000 13 500 0 042 0 044 0 042 0 044 0 20 0 21 0 20 0 21 Power 15 000 17 000 0 054 0 054 0 26 0 26 6 000 6 700 0 042 0 042 0 20 0 20 Cooling capacity Heating capacity Cooling Input Heating Cooling Current Heating Electric characteristic Unit Galvanized sheets Standard grilles ABS resin acrylic coating Munsell lt 0 98Y 8 99 0 63 gt PMFY P NBMU E 6 4Y 8 9 0 4 gt PMFY P NBMU E 2 ER3 ER4 ERS5 Exterior munsell symbol 9 1 16 lt 1 3 16 gt 31 15 16 lt 39 3 8 gt 15 9 16 lt 18 1 2 gt Height Width Depth Dimensions Heat exchanger Cross fin
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19. button is pressed once Cooling 67 to 87 Opan MENU Pal Ts FILTER BACK MONTORSET DAY 382 Ca J no PAR 21MAA CLOCK VOPERATIONA CLEAR 1 Control modes Control details Remarks 1 Thermostat function 1 1 Thermostat function Room temperature desired temperature 2 F Thermo ON Room temperature desired temperature Thermo OFF 1 2 Anti freezing control Detected condition When the liquid pipe temp TH22 is 32 F or less in 16 minutes from compressors start up anti freezing control starts and the thermostat OFF Released condition The timer which prevents reactivating is set for 3 minutes and anti freezing control is cancelled when any one of the following conditions is satisfied Liquid pipe temp TH22 turns to be 50 F or above The condition of the thermostat OFF becomes complete by thermostat etc The operation mode becomes a mode other than COOL The operation stops 1 3 Compressor time delay minutes minimum off cycle By the remote controller setting switch of 4 speeds Type Fan speed notch Low Medium2 Medium1 High OC341F 15 Control modes Control details Remarks 3 Drain pump 3 1 Drain pump control Always drain pump ON during the COOL and DRY mode operation Regardless of the thermostat ON OFF When the operation mode is changed from COOL or DRY to any other mode including Sto
20. 0kQ 80 F 4 8kO 90 F 3 9kO 100 F 3 2kO Gas pipe thermistor Resistance 30 F 15 8kQ 50 F 9 6kO 70 F 6 0kQ 80 F 4 8kO 90 F 3 9kO 100 F 3 2kO Fuse Indoor controller board 250V PMFY P NBMU E 250V 6 3A PMFY P NBMU E 2 ER3 ER4 ER5 Fan motor DC Brushless Motor 8 pole OUTPUT 28W PNOH28 MB Vane motor MSFJC 20M23 12V 3800 Drain pump PJV 1063 208 240V 50 60Hz Drain sensor Thermistor resistance 30 F 6 3kO 50 F 3 9kQ 70 2 5 80 F 2 0kQ 90 F 1 6kQ 100 F 1 3kQ Linear expansion valve DC12V Stepping motor drive port dimension 43 2 0 2000pulse EDM 40YGME Power supply terminal block L1 L2 GR Rated 330V 30A Transmission terminal block M1 M2 S Rated to 250V 20 MA remote controller terminal block OC341F 1 2 Rated to 250V 10 Refer to WIRING DIAGRAM for the supplied voltage 4 3 AIR CAPACITY TAKEN FROM OUTSIDE PMFY P NBMU E series are capable of taking air from outside When taking air from outside the duct fan is used The air capacity should be 20 6 or less of the airflow SPEC Hi 9 13 16 11 3 8 7 1 ge T LEX 5 9 2 Fresh air intake hole Fresh air intake hole e Knockout Knockout Unit inch Airflow Hi opener TEES PMFY PO6NBMU E E1 E 2 ER3 ER4 ER5 300 CFM 60CFM PMFY PO8NBMU E E1 E 2 ER3 ER4 ER5 32
21. 1 Rt 15exp 3480 273 t 32 1 8 273 30 F 15 8kQ 50 9 6kQ 70 F 6 0kQ 80 F 4 8kQ 90 3 9kQ 100 F 3 2kQ Thermistor for drain sensor Drain sensor DS Thermistor Ro 6 0kQ 5 Fixed number of B 3390 2 Rt 6exp 3390 L 273 t 32 1 8 273 30 F 6 3kQ 90 F 1 6kQ 50 F 3 9kQ 100 F 1 3kQ 70 F 2 5kQ 140 F 0 6kQ 80 F 2 0kQ Thermistor for lower temperature 50 40 Resistance 20 0 20 40 60 80 100 120 Temperature igs Thermistor for drain sensor gt Resistance kQ 20 40 60 80 100 120 140 170 Temperature F Linear expansion valve 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 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 Controller board DC12V Linear expansion valve Brown 6 er na d 4 Blue Red a Drive circuit dtm ptt oc 6 IND 3 Orange 3 3 Yellow 9 A 3 2 Yellow HN 12 White Orange T lt 1 White 1 hd od Connector CN60 Note Since the number of the connector at the controller boa
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23. 8 2 DRY OPERATION ate MITSUBISHI ELECTRIC How to operate gt me HEU EE Press POWER ON OFF button ig al Press the operation MODE button to display DRY EIE Press the TEMP button to set the desired temperature ON OFF NOTE The set temperature changes 2 F when the Gor Caybutton is pressed once Dry 67 to 87 F DMeGGosse OMENU oNiorr al A X BACK MONITORSET DAY Iu 382 4 CHK TEST Cv gt PAR 21MAA cLock VOPERATIONA Control modes Control details 1 Thermostat function 1 1 Dry mode temperature is controlled by TH21 Dry mode ON temperature desired temperature 2 F Dry mode OFF Room temperature desired temperature Room 3 min passed since starting operation Room temperature 83 F F TaZ 79 F ON 2 Over 64 F 79 F gt 75 F 75 F gt FF Less than 64 F Dry mode OFF 1 2 Frozen prevention control No control function Indoor fan operation control depends on the compressor conditions Dry mode Fan speed notch ON Low OFF Stop Note Remote controller setting is not acceptable 3 Drain pump Same control as COOL operation 4 Vane Same control as COOL operation up down vane change OC341F 17 8 3 FAN OPERATION How to operate s MITSUBISHI
24. ELECTRIC Press POWER ON OFF button AG Press the operation MODE button to display FAN I ONTA osi sel 38 B Temp ON OFF CC oC Opono OMENU oono FILTER C C Y COS BACK MONTORSET DAY 382 4 CHEK TEST C4 PAR 21MAA CLOCK VOPERATIONA CLEAR Control modes Control details Remarks Set by remote controller Type Fan speed notch 4 speeds type Low Medium2 Medium1 High 2 Drain pump 2 1 Drain pump control The drain pump turns ON for the specified amount of time when any of the following conditions is satisfied ON for 3 minutes after the operation mode is switched from COOL or DRY to another operation mode FAN ON for 6 minutes after the drain sensor is determined to be submerged using the liquid level detection method given below ON for 6 minutes after indoor piping liquid piping temperature indoor room temperature 18 F AND the drain sensor input is at the short or open level If condition is still being met after the drain pump has been turned ON for 6 minutes the drain pump is kept ON for a further 6 minutes 2 2 Liquid level detection method The liquid level is detected by determining whether or not the drain sensor is submerged based on the amount the temperatu
25. Filter 41 button button b fs FILTER MONITOR SET DAY TO TEST CA PAR 21MAA CLOCK V OPERATION A CLEAR Test Run button Check button Clear button Airflow Up Down button NS Opening the cover Display Section For the purposes of this explanation all parts of the display are shown During actual operation only the relevant items will be lit Identifies the current operation Day of Week Shows the current day of the week Louver button Built in temperature sensor Operation button To return operation number Ventilation button A Operation button To go to next operati number o 5 Time Timer Display timer is set switched off is shown Shows the current time unless the simple or Auto Off If the simple or Auto Off timer is set the time to be Sensor indication Displays when the remote controller sensor is used Shows the operating mode etc Multilanguage display is available MITSUBISHI ELECTRIC Locked indicator Indicates that remote controller
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27. OFF Setting air flow Depends on SW1 7 ON Low Auto restart function Effective Not effective OFF ON Setting air flow ON ON Stop Power ON OFF by breaker Effective Not effective MODELS SW 2 MODELS SW 2 Indoor controller board N N SW2 0 crc rg Capacity 123456 Initial setting code setting PMFY POBNBMU E pul m EN PMFY P15NBMU E Set for each capacity Heat pump Cool only Cooling only Heat pump Indoor controller board Louver Available Not available Vane Available Not available Initial setting ON Vane swing function Available Not available OFF i 12345678910 Vane horizontal angle Second setting 6 First setting Er emi 3 X4 At cooling mode each Vane cooling limit angle setting X4 Horizontal angle Down B C angle can be used only h h f li 1 hour valve Effective Not effective Under 9X5 SW 3 9 setting thermostat is OFF Heating 4deg up Not effective Effective SUSPENSION PMFY P06 POSNBMU E ON PMFY P12 P15NBMU E OFF Target superheat setting 5 SW 3 10 setting PMFY P06 POBNBMU E ON Target sub cool setting X5 PMFY P12 P15NBMU E OFF SW3 Function setting 2 OJN A Do use SW3 9 10 as trouble might be caused by the usage condition 6
28. amp CLOCK V OPERATION A CLEAR Control modes Control details 1 Initial value of HEAT mode for room temperature lt Desired temperature operation mode COOL mode for room temperature Z Desired temperature 2 Mode change 1 HEAT mode COOL mode Room temperature Desired temperature 3 F or minutes has passed 2 COOL mode HEAT mode Room temperature Desired temperature 3 F 3 minutes has passed 3 COOL mode Same control as cool operation 4 HEAT mode Same control as heat operation 8 6 WHEN UNIT IS STOPPED Control modes 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 is satisfied regardless of whether the compressor is ON or OFF ON for 3 minutes after the operation mode is switched from COOL or DRY to another operation mode HEAT mode ON for 6 minutes after the drain sensor is determined to be submerged using the liquid level detection method given below ON for 6 minutes after indoor piping liquid piping temperature indoor room temperature 14 and the drain sensor input is at the short or open level If condition G is still being met after the drain pump has been turned ON for 6 minutes the drain pump is kept ON for a further 6 minutes Liquid level detection method The liquid level is detected by determining
29. but tons have been locked Centrally Controlled indicator Indicates that operation from the remote controller has been prohib TIME SUN MON TUE WED THU FRI SAT ON AFTER 1 III 1 1 AFTER Timer di d k Ta Clean The Filter indicator To be displayed on when it is time to clean the filter Timer indicators iu WEEKLY 3824 SIMPLE AUTO OFF The indicator comes on if the corre sponding timer is set ited by a master controller Fan Speed indicator Shows the selected fan speed Up Down Air Direction indica tor Room Temperature display Timer is Off indicator Indicates that the timer is off Temperature Setting Shows the target temperature OC341F Shows the direction of the outcoming airflow Hour Only indicator Shows the room temperature The room temperature display range is 46 102 F The display blinks if the temperature is less than 46 F 102 F or more Ventilation indicator Appears when the unit is running in Ventilation mode Displays if the airflow is set to low or downward during COOL or DRY mode Operation varies according to model The indicator goes off in one hour when the airflow direction also changes
30. mode When the thermostat function changes to OFF the indoor fan operates in Extra low 2 4 Heat defrosting mode The indoor fan stops No drain pump operation However when the control changes from COOL or DRY operation the drain pump operates for 3 minutes 1 Initial setting OFF ast setting When changing the mode from exception of HEAT to HEAT operation Downward C 2 Vane position Horizontal Downward A gt Downward B Downward C Swing t 3 Restriction of vane position The vane is horizontally fixed for the following modes The control by the remote controller is temporarily invalidated and controlled by the unit Thermo OFF Stand by hot adjust Extra low mode Heat defrost mode OC344F 20 Remarks 8 5 AUTO OPERATION AUTOMATIC COOL HEAT CHANGE OVER OPERATION How to operate gt MITSUBISHI ELECTRIC Press POWER ON OFF button E Press the operation MODE button to display AUTO Press the TEMP button to set the desired temperature NOTE The set temperature changes 2 F when the button is 1 5 Bi reve ONOFF DA C pressed once Automatic 67 to 83 F ct When in AUTO mode the unit will switch from either heat or cool C Gy Ou automatically to maintain the set temperature BACK MONTORSET DAY I 382 8 CHECK TEST y 50 PAR 21MAA
31. possible to extract a signal for an external heater PMFY PO6NBMU E PMFY PO8NBMU E PMFY P12NBMU E PMFY PO6NBMU E 2 PMFY PO8NBMU E 2 PMFY P12NBMU E 2 PMFY P15NBMU E PMFY P15NBMU E 2 1 CONTROLLER BOARD has been changed 2 PANEL has been changed PMP 16BMU gt PMP 16BMUW White 0 98Y 8 99 0 63 Pure white 6 4Y 8 9 0 4 3 FAN MOTOR MF has been changed 4 THERMISTORs TH22 TH23 have been changed PMFY PO6NBMU E PMFY PO8NBMU E PMFY PO6NBMU E PMFY POSNBMU E PMFY P12NBMU E PMFY P12NBMU E PMFY P15NBMU E PMFY P15NBMU E 1 FAN MOTOR MF has been changed 2 CONTROLLER BOARD has been changed 2 2 FEATURES Indoor Unit Models Cooling capacity Heating capacity PMFY PO6NBMU E 6 000 6 700 Btu h PMFY PO8NBMU E 8 000 9 000 Btu h PMFY P12NBMU E 12 000 13 500 Btu h PMFY P15NBMU E 15 000 17 000 Btu h 1 Fresh Air Intake Air recycled indefinitely can become stale and stagnant with air quality suffering significantly Fresh air is the answer and it is for this reason that the PMFY series takes in air directly from outdoors This fresh air intake allows you to enjoy the comfort of crisp refreshing air in the confines of your living or working space 2 Light and Compact The main unit weighs only 31 Ib and the panel merely 7 lb This makes the PMFY series one of the light est in the industry The unit size is also quite small havi
32. 0 CFM 64CFM PMFY P12NBMU E E1 E 2 ER3 ER4 ER5 320CFM 64CFM PMFY P15NBMU E E1 E 2 ER3 ER4 ER5 370CFM 74CFM Be sure to secure insulation 265 Operation in conjunction with duct fan Booster fan e Whenever the indoor unit is operating the duct fan n operates indoor unit lt Yelow a 1 Connect the optional multiple remote controller board Connector 5P mag Grange adaptor PAC SA88HA E to the connector CN51 Brow on the indoor controller board Indoor unit side PE Installation at site 2 Drive the relay after connecting the 12V DC relay adapter s re to secure insulation between the Yellow Orange connector lines PAC SA88HA E material by tape etc a relay of 1W or smaller Indoor controller board MB Electromagnetic switch power relay for duct fan Distance between indoor X Auxiliary relay 12V DC LY 1F controller board and relay must be within 33 feet Multiple remote Howto read curves _ Duct characteristics Curveinthe at site i pu graphs CNST 0 Q Designed amount of fresh air intake A Static pressure loss of fresh air Characteristic diagram of air capacity taken from outside of PMFY P NBMU E intake duct system with air flow amount Q in W G 0 2 B Forced static pressure at air co
33. 8 230V CN31 LED2 CN2M Drain sensor DS Power supply R B Connect to the terminal block TB15 Connect to the terminal block TB5 MA Remote controller connecting wire M NET transmission connecting wire Between to 8 7 13V DC Pin 24 30V DC non polar OC344F 28 Indoor controller board PMFY PO6NBMU E 2 PMFY PO6NBMU ER3 PMFY PO6NBMU ER4 PMFY PO6NBMU ER5 FUSE 6 3A 250V CNMF1 CNMF2 FAN motor 1 20 294 325V DC CNMF2 15V DC CNMF26 0 6 5V DC CNMF2 0 0 15V DC CN2M Connect to the terminal block TB5 M NET transmission connecting wire 24 30V DC non polar LED2 2 PMFY PO8NBMU ER5 CND Power supply 208 230V AC PMFY P12NBMU E 2 PMFY P12NBMU ER3 PMFY P12NBMU ER4 PMFY P12NBMU ER5 CNP PMFY P15NBMU E 2 PMFY P15NBMU ER3 PMFY P15NBMU ER4 PMFY P15NBMU ER5 Drain pump output DP 208 230V Power supply for MA Remote controller MA Remote controller connecting wire 8 7 13V DC Pin CN6V1 Vane motor 12VDC pulse output CN32 Connector Remote switch 3 RGOOVISS Sw2 Sw3 Capacity setting OC341F 29 Function setting Model setting CN52 Remote indicator Status lamp 12VDC Fan motor outp
34. MITSUBISHI ELECTRIC Changes for the Better SPLIT TYPE HEAT PUMP AIR CONDITIONERS TECHNICAL amp SERVICE MANUAL CITY MULTI Series Indoor unit Model names PMFY PO6NBMU E PMFY PO8NBMU E PMFY P12NBMU E PMFY P15NBMU E Service Ref PMFY PO6NBMU E PMFY PO6NBMU E 2 PMFY PO6NBMU ER4 PMFY PO8NBMU E PMFY PO8NBMU E 2 PMFY PO8NBMU ER4 PMFY P12NBMU E PMFY P12NBMU E 2 PMFY P12NBMU ER4 PMFY P15NBMU E PMFY P15NBMU E 2 PMFY P15NBMU ER4 INDOOR UNIT Ceiling Cassettes April 2012 No OC341 REVISED EDITION F R410A R22 PMFY POGNBMU E PMFY POGNBMU ER3 PMFY POGNBMU ER5 PMFY PO8NBMU E PMFY PO8NBMU ER3 PMFY PO8NBMU ER5 PMFY P12NBMU E PMFY P12NBMU ER3 PMFY P12NBMU ER5 PMFY P15NBMU E PMFY P15NBMU ER3 PMFY P15NBMU ER5 Revision PMFY P06 08 12 15NBMU ER5 have been added REVISED EDITION F Some descriptions have been modified Please void OC341 REVISED EDITION E NOTE This manual describes only service data of the indoor units RoHS compliant products have G mark on the spec name plate For servicing RoHS compli ant products refer to the RoHS PARTS LIST CONTENTS 1 TECHNICAL CHANGES 2 5 FEATURES niece neanche tenes 3 3 PART NAMES AND FUNCTIONS 3 4 5 5 OUTLINES AND DIMENSIONSGS 9 6 WIRING 1
35. MS Sed uonoejep edid EZHL uonoe es MS Oft G 4o LL OS Ve 2 poo YOUMS ZMS lt uomeoipu 29 0 caL S LN 0199 42 0191 42 1 ISNO 1 ZENO TUNE NS M i n vi 1edureg 72 M YOOCNI _ uoissiusueJ L 981 5 LX3N OL pe E IEEE E K ddns 1 Jeuiuue zal pJeoq 1 Joopu 91 T Wed pow JoquiAs Joqu S WU3TIOHINOO 340 33 _ pue6e1 3371091405 99 310 3UVW OL LINN HOOGLNO OL 13 OC341F 7 REFRIGERANT SYSTEM DIAGRAM PMFY PO6NBMU E PMFY PO6NBMU E PMFY PO6NBMU E 2 PMFY PO6NBMU ER3 PMFY PO6NBMU ER4 PMFY PO6NBMU ER5 PMFY PO8NBMU E 2 PMFY PO8NBMU ER3 PMFY PO8NBMU ER4 PMFY PO8NBMU ER5 PMFY P12NBMU E PMFY P12NBMU E PMFY P12NBMU E 2 PMFY P12NBMU ER3 PMFY P12NBMU ER4 PMFY P12NBMU ER5 PMFY P15NBMU E PMFY P15NBMU E PMFY P15NBMU E 2 PMFY P15NBMU ER3 PMFY P15NBMU ER4 PMFY P15NBMU ER5 Heat exchanger NE Thermistor TH21 lt Room temperature detection gt Service Ref Item Strainer 50mesh Thermistor TH23 Thermistor TH22 Gas pipe temperatur
36. MU ER4 PMFY P15NBMU ER5 LOH6016Z9Y Q ty set PMFY P06 08 12 15 NBMU NBMU NBMU NBMU E 2 ER4 3P L1 L2 GR 1 1 1 1 M1 M2 S 2P 1 2 Remarks Wiring Recom Drawing Diagram mended No Symbol Q ty Part No Part No Specification RoHS T7W E41 716 R01 E27 246 R01 E53 246 T7W E01 294 R01 E10 304 T7W 420 239 R01 E06 239 T7W E59 310 T7W E67 310 T7W E72 310 T7W E85 310 T7W C04 310 TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK ADDRESS BOARD CABLE ASSY FUSE FUSE INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD TB2 TB5 TB15 A B 250V 6A 250V 6 3A ON O OQ OC344F 40 OC341F 41 CITY MULTI MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN Copyright 2005 MITSUBISHI ELECTRIC CORPORATION Distributed in Apr Distributed in Dec Distributed in Dec Distributed in May Distributed in Jul Distributed in Aug Distributed in Jun Made in Japan 2012 No 2009 No 2008 No 2008 No 2007 No 2006 No 2005 No OC341 OC341 OC341 OC341 OC341 OC341 OC341 REVISED EDITION F REVISED EDITION E PDF 7 REVISED EDITION D PDF 7 REVI
37. MV Yellow 2 Red W Brown Green Orange Measure the resistance between the terminals with a tester At the ambient temperature 68 F 86 F Connector Brown Yellow Normal Abnormal Brown Red 3800 7 Open or short Brown Orange Brown Green Linear expansion valve LEV BI Brown 279 Yellow CD lue Orange Red White Disconnect the connector then measure the resistance with a tester Normal Abnormal Yellow Brown Orange Red 2000 10 White Red Refer to the next page for the details Blue Brown Open or short Drain pump DP Measure the resistance between the terminals with a tester At the ambient temperature 68 F Normal Abnormal Blue 4000 4800 Open short Drain sensor DS OC341F Measure the resistance after 3 minutes have passed since the power supply was turned off At the ambient temperature 32 F 140 F Normal Abnormal 0 6kQ 6 0kQ Open or short Refer to the next page for the details 22 Thermistor characteristic graph Thermistor for Thermistor Room temperature detection TH21 lower temperature Thermistor Liquid pipe temperature detection TH22 Thermistor Gas pipe temperature detection TH23 Thermistor Ro 15kQ 396 Fixed number of 3480 296 1
38. OTOR R01 E02 092 VANE SLEEVE T7W H92 480 HEAT EXCHANGER T7W H93 480 HEAT EXCHANGER R01 E30 529 DRAIN PAN ASSY R01 H12 202 THERMISTOR ROOM R01 E03 038 GUIDE VANE 8pcs set N15 202 THERMISTOR LIQUID GAS R01 H06 401 EXPANSION VALVE R01 E16 002 VANE R01 E05 110 CASING ASSY R01 32K 241 SENSOR HOLDER R01 E11 266 DRAIN SENSOR T7W E11 355 DRAIN PUMP R01 E35 130 MOTOR SUPPORT R01 E49 220 FAN MOTOR R01 E13 105 MOTOR MOUNT LL L R set R01 E05 527 DRAIN PIPE ASSY h lt lt lt lt lt R01 E10 527 DRAIN PIPE ASSY R01 18J 523 JOINT SOCKET Q OIO0Q0oO0 0 0 0 00020 0 0 0 0 0 060200 0 0 0 0 E03 673 OC341F SCREW amp WASHER 39 RoHS PARTS LIST ELECTRICAL PARTS PMFY PO6NBMU E PMFY PO6NBMU E PMFY PO6NBMU E 2 PMFY PO6NBMU ER3 PMFY PO6NBMU ER4 PMFY PO6NBMU ER5 PMFY PO8NBMU E PMFY PO8NBMU E PMFY PO8NBMU E 2 PMFY PO8NBMU ER3 PMFY PO8NBMU ER4 PMFY PO8NBMU ER5 PMFY P12NBMU E PMFY P12NBMU E PMFY P12NBMU E 2 PMFY P12NBMU ER3 PMFY P12NBMU ER4 PMFY P12NBMU ER5 PMFY P15NBMU E PMFY P15NBMU E PMFY P15NBMU E 2 PMFY P15NBMU ER3 PMFY P15NB
39. R3 PMFY P06 08 12 15NBMU ER4 PMFY P06 08 12 15NBMU ER5 10 11 10 2 Part No Part Name Specification Q ty set PMP 16 BMU BMUW Remarks Drawing No Wiring Diagram Symbol T7W E16 003 AIR OUTLET GRILLE 1 T7W E22 003 AIR OUTLET GRILLE R01 E01 055 LATCH R01 E01 099 PANEL HOOK R01 E07 054 GRILLE CATCH R01 E14 500 L L FILTER R01 E15 500 L L FILTER T7W E04 691 INTAKE GRILLE T7W E06 691 INTAKE GRILLE R01 E06 054 GRILLE SHAFT R01 E01 648 RECEIVER COVER R01 E01 044 MAGNET R01 E04 096 SCREW CAP 9 0 0 0 0 0 01 0 RoHS R01 E07 096 1 SCREW 35 RoHS PARTS LIST FUNCTIONAL PARTS PMFY PO6NBMU E PMFY PO8NBMU E PMFY P12NBMU E PMFY P15NBMU E PMFY PO6NBMU E PMFY POSNBMU E PMFY P12NBMU E PMFY P15NBMU E 36 OC341F RoHS PARTS LIST Part number that is circled is not shown in the figure Q ty set Wiring Recom PMFY Remarks Diagram mended P NBMU E P NBMU E Drawing Symbol 06 08 12 15 06 08 12 15 23A BEARING MOUNT 1 1 E04 SLEEVE BEARING E32 LINE FLOW FAN E01 STABILIZER ASSY E18 VANE MOTOR E02 VANE SLEEVE H08 HEAT EXCHANGER H09 HEAT EXCHANGER E30 DRAIN PAN ASSY H12 THERMISTOR ROOM E03 GUIDE VANE H16 THERMISTOR LIQUID H17 THERMIS
40. SED EDITION C PDF 7 REVISED EDITION B PDF 9 REVISED EDITION A PDF 9 PDF 10 New publication effective Apr 2012 Specifications are subject to change without notice
41. Second setting means first setting In case replacing the indoor controller board make sure to set the switch to the initial setting which is shown below Before PMFY P NBMU E PMFY P NBMU E PMFY P NBMU E 2 ER3 ER4 ER5 power OFF SEF OFF ON series 12345 12345 12345 Indoor controller board OC344F 26 Switch Operation by switch Effective timing Remarks SW11 1s digit address setting Rotary switch setting SW12 5 1 91077 947 Oe Os s 9 9 10 1 How to set addresses Example If address is 3 remain SW12 for over 10 at 0 and match SW11 for 1 to 9 with 3 SW14 Branch No setting Rotary switch SW14 How to set branch numbers SW14 Series R2 only Match the indoor unit s refrigerant pipe with the BC controller s end connection number Remain other than series R2 at 0 SW5 Voltage Selection OC341F 220V 240V 208V 230 E If the unit is used at the 230V area set the voltage to 230V If the unit is used at the 208V set the voltage to 208V 27 Address board Initial setting SW12 SW11 AUX AX 05 96 954 Address board Initial setting SW14 UA 5 Zr Address board Initial setting 220V 240V 208V 230V _
42. TOR GAS EXPANSION VALVE E16 VANE E05 CASING ASSY 32K SENSOR HOLDER E11 DRAIN SENSOR E11 DRAIN PUMP E35 MOTOR SUPPORT E24 FAN MOTOR E45 FAN MOTOR E13 MOTOR MOUNT E05 DRAIN PIPE ASSY E03 SCREW amp WASHER Part No Part Name Specification 8pcs set oe o lt E G G G G G G G G G G G G G G G G G G G G G G G G G OC344F 37 RoHS PARTS LIST FUNCTIONAL PARTS PMFY PO6NBMU E 2 PMFY PO8NBMU E 2 PMFY P12NBMU E 2 PMFY P15NBMU E 2 PMFY PO6NBMU ER3 PMFY PO8NBMU ER3 PMFY P12NBMU ER3 T PMFY P15NBMU ER3 gt E PMFY PO6NBMU ER4 22 PMFY PO8NBMU ER4 S PMFY P12NBMU ER4 PMFY P15NBMU ER4 PMFY PO6NBMU ER5 PMFY PO8NBMU ER5 PMFY P12NBMU ER5 PMFY P15NBMU ER5 4 D OC341F 38 RoHS PARTS LIST Part No RoHS Part Name Part number that is circled is not shown in the figure Specification Q ty set PMFY P NBMU E 2 NBMU ER3 NBMU ER4 NBMU ER5 06 08 12 15 06 08 12 15 Remarks Drawing No Wiring Diagram Symbol R01 23A 102 BEARING MOUNT 1 1 1 R01 E04 103 SLEEVING BEARING E32 114 LINE FLOW FAN R01 E01 079 STABILIZER ASSY R01 E18 223 VANE M
43. ard cover See Photo 3 Remove the electrical parts cover See Photo 3 Disconnect the connector of vane motor fan motor and drain pump Remove the nozzle side of the heat exchanger 2 screws Remove the nozzle and line flow fan can be removed without removing the heat exchanger 7 Removing the thermistor Room temperature detection gt 1 Remove the panel 2 Remove the address board cover 3 Remove the electrical parts cover 4 Remove the thermistor lt Intake temperature detector gt 5 Disconnect the lead wire from the cord clamp 5 points 6 Disconnect the connector CN20 on the indoor controller board 8 Removing the thermistor lt Liquid pipe temperature detection gt lt Gas pipe temperature detection gt 1 Remove the panel 2 Remove the address board cover 3 Remove the electrical parts cover 4 Remove the drain pan 5 Remove the thermistor lt Gas pipe temperature detection gt lt Liquid pipe temperature detection gt 6 Disconnect the lead wire from the cord clamp 7 Disconnect the connector CN21 CN29 CN44 on the indoor controller board Connector CN21 Liquid NBMUq CN29 Gas CN44 Liquid and Gas NBMU 2 NBMURS NBMUR4 NBMUR5 OC341F 34 11 RoHS PARTS LIST PANEL PARTS PMP 16BMU FOR PMFY P06 08 12 15NBMU E PMFY P06 08 12 15NBMU E PMP 16BMUW FOR PMFY P06 08 12 15NBMU E 2 PMFY P06 08 12 15NBMU E
44. e detection Strainer 100mesh Gas pipe Liquid pipe temperature detection Liquid pipe Linear expansion valve Strainer 100mesh Strainer pipe 100mesh Unit in mm PMFY P06 P08 P 12 P15NBMU E PMFY P06 P08 P12 P15NBMU E1 PMFY P06 P08 P 12 P15NBMU E 2 PMFY P06 P08 P12 P15NBMU ER3 PMFY P06 P08 P 12 P15NBMU ER4 PMFY P06 P08 P12 P15NBMU ER5 Gas pipe 91 2 12 7 Liquid pipe Service Ref Item 1 4 6 35 Unit mm PMFY P06 PO8NBMU E PMFY P06 PO8NBMU E1 PMFY P06 PO8NBMU E 2 PMFY P06 PO8NBMU ER3 PMFY P06 PO8NBMU ER4 PMFY P06 PO8NBMU ERS5 PMFY P12 P15NBMU E PMFY P12 P15NBMU E1 PMFY P12 P15NBMU E 2 PMFY P12 P15NBMU ER3 PMFY P06 PO8NBMU ER4 PMFY P06 PO8NBMU ERS5 Capillary tube 1 0 4 6 x I D 03 4 x 200 0 D 43 6 x 1 02 4 x 200 Capillary tube 2 OC341F 0 93 6 x 1 0 02 4 x 280 14 8 MICROPROCESSOR CONTROL INDOOR UNIT CONTROL 8 1 COOL OPERATION 2 MITSUBISHI ELECTRIC How to operate me TIBERI Se Press POWER ON OFF button aere aster Press the operation MODE button to display COOL HERE oul seen a ORE Press the TEMP button to set the desired temperature Breve NOTE The set temperature changes 2 F when the or
45. eck points Disconnect the connector on the controller board then con nect LED for checking mD 1kQ LED When power is turned on pulse signals will send for 10 seconds If the LED does not light or keeps lighting even after the signals stop that means some failures in the operation circuit Countermeasures Exchange the indoor con troller board at drive circuit failure Linear expansion valve mechanism is locked Motor will idle and make a ticking noise when the motor is operated while the linear expansion valve is locked This tick ing sound is the sign of the abnormality Exchange the linear expan sion valve Short or breakage of the motor coil of the linear expansion valve Measure the resistance between each coil white red yellow brown orange red blue brown with a tester It is normal if the resistance is in the range of 2000 11096 Exchange the linear expan sion valve Valve does not close completely To check the linear expansion valve operate the indoor unit in fan mode and at the same time operate other indoor units in cooling mode then check the pipe temperature liquid pipe temperature of the indoor unit by the outdoor multi controller board operation monitor During fan operation linear expan sion valve is closed completely and if there 77 Liquid pipe I any leaking detecting temperature of the thermistor will go lower If the detected temperature is much low
46. er than the tem perature indicated in the remote controller it means the valve is not closed all the way It is not necessary to exchange the linear expansion valve if the leakage is small and not affecting normal operation Linear _ expansion valve If large amount of refriger ant is leaked exchange the linear expansion valve Wrong connection of the connector or contact failure Check the color of lead wire and missing terminal of the con nector Disconnect the connector at the controller board then check the continuity OC341F 24 9 2 FAN MOTOR CHECK Check method of indoor fan motor fan motor controller board O Notes High voltage is applied to the connecter FAN CNMF1 2 for the fan motor Pay attention to the service Do not pull out the connector FAN CNMF1 2 for the motor with the power supply on doing so may result in damage to the board FAN PMFY P06 08 12 15NBMU E PMFY P06 08 12 15NBMU E1 CNMF1 2 PMFY P06 08 12 15NBMU E 2 PMFY P06 08 12 15NBMU ER3 PMFY P06 08 12 15NBMU ER4 PMFY P06 08 12 15NBMU ER5 Self check Symptom The indoor fan can not rotate Indoor controller board fuse check Is the resistance Yes Replace the fan motor Is the fuse normal gt between the terminas of ps the iridoor controller board lve drain pump normal Wiring contact check Contact of fan motor connector 1 2 Rep
47. lace the drain pump Is there contact failure 5 Turn ON the power supply Power supply check Check the voltage of the indoor controller board with the connector FAN CNMF1 2 connected to the board Approx 294 325V DC between the connecter lt FAN gt lt CNMF1 and 2 gt Yes Is the voltage normal Replace the fan motor No OK Check the operation gt END Replace the the indoor controler board Replace the indoor controller board Check the operation gt END NG C Replace the fan motor OC344F 25 9 3 FUNCTION OF DIP SWITCH Operation by switch Switch Function Effective Remarks ON OFF timing Thermistor Room temperature detection position Built in remote controller Indoor unit Address board Filter clogging detection Provided Not provided Initial setting Filter cleaning sign 2 500h 100h ON OFF Fresh air intake Effective Not effective 12345678910 Swi Switching remote Thermo ON Indicating fan operation Function Sontroller display signal display ON OFF 9 Under setting Humidifier control Fan operation at Heating mode heating ON Operation Air flow at Low Extra low Extra low Heat thermo
48. m temperature thermistor Figure 9 3 Unhook the claws in the middle of nozzle and remove the Insulation material drain pan 5 screws See Photo 2 marg Side cer inguiation Soft side of insulation 4 Remove the nozzle side of the heat exchanger 2 screws 5 Remove the address board cover See Photo 3 6 Remove the electrical parts cover See Photo 3 7 8 SSSSASSSSY 272727204 Disconnect the connector of vane motor Remove the insulation material white on the right side of nozzle 9 Remove the nozzle 6 screws Vane motor fe 4 Removing the vane motor Photo 5 1 Remove the nozzle Refer to above mentioned 3 Removing the nozzle 2 Remove the vane motor from the nozzle Vane motor OC344F 33 OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS 5 Removing the drain pump Photo 6 1 Remove the panel 2 Unhook the claw in the middle of nozzle and remove the drain pan See Photo 2 3 Remove the address board cover See Photo 3 4 Remove the electrical parts cover See Photo 3 5 Disconnect the connector of drain pump 6 7 Remove the drain hose Remove the drain pump 2 screws 6 Removing the fan motor and line flow fan Photo 7 1 Remove the panel 2 Unhook the claw in the middle of nozzle and remove the drain pan See Photo 2 Unscrew 2 screws at the nozzle side of the heat exchanger Remove the address bo
49. ndi tioner inlet with air flow amount Q 0 1 in W G C Static pressure of booster fan with 0 air flow amount in W G D Static pressure loss increase o amount of fresh air intake duct 2 01 system for air flow amount Q in W G 0 2 E Static pressure of indoor unit with air flow amount Q in W G 03 Qa Estimated amount of fresh air intake without D 04 0 10 20 30 40 50 60 70 80 Air flow CFM 7 4 4 NOISE CRITERION CURVES PMFY PO6NBMU E PMFY POGNBMU E NOTCH SPL dB LINE PMFY PO6NBMU E 2 High 35 PMFY PO6NBMU ER3 33 PMFY PO6NBMU ER4 Medium2 30 yos Low 27 oe PMFY PO6NBMU ER5 _ 90 I I I 7 S Q m 3 t 9 80 o 2 70 60 gt 50 2 7 o ra E 40 a z o 8 30 lt 2 i 20 4 i PON 5 THRESHOLD OF HEARING t FOR CONTINUOUS NOISE 5 F 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz PMFY P15NBMU E PMFY P15NBMU E NOTCH SPL dB LINE PMFY P15NBMU E 2 39 PMFY P15NBMU ER3 37 a PMFY P15NBMU ER4 Medium2 35 PMFY P15NBMU ER5 90 80
50. ng been standardized to a strikingly compact 33 5 8 inch All of this make the chore of installation and maintenance that much simpler and easier 3 PART NAMES AND FUNCTIONS e Indoor Unit Auto Air Swing Vane Disperses airflow up and Guide vane down and adjusts the angle Air flow can be changed to horizontal of airflow direction by moving the guide vane to the left or right Horizontal Air Outlet Filters Air intake Remove dust and pollutants Returns air from room from return air OC344F 3 e Wired remote controller Once the controllers are set the same operation mode can be repeated by simply pressing the ON OFF button Note The phrase Wired remote controller in this manual refers only to the PAR 21MAA If you need any information for the other remote controller please refer to either the installation manual or initial setting manual which are included in remote controller s box Temperature setting buttons Cv Down CA Up Timer Menu button ON OFF button MITSUBISHI ELECTRIC Monitor Set button Mode button Return button Set Time buttons CZ Back Ahead Timer On Off button Set Day button Fan Speed button B Teme D ON OFF LR
51. on the indoor unit 3 Adjust the grille so that it fits properly in the angle between the ceiling and the wall and install the securing screws supplied with this grille in their 4 places at left and right leaving them slightly loose 4 Tighten the securing bolts 9 and securing screws in the centre 3 places See Figure 6 5 Tighten the securing bolts in the 4 places at left and right Make sure there are no gaps between the indoor unit and the grille and between the grille and the ceiling surface If there are gaps the wind may come in and it may cause water to drip See Figure 8 Tighten the securing bolts and securing screws com pletely 6 Replace the air filter and screw cover and press the intake grille until you hear it snap into place PUSH of Checks after setting the grille 1 Check that there are no gaps between the indoor unit and the grille between the grille and the ceiling surface If there are gaps the wind may come in and condensation may result 2 Check that the air filter is in place OC344F 32 Figure 6 RB Temporary holding tabs
52. p the drain pump continues to run for 3 minutes Drain sensor function x1 The indoor circuit board energizes the drain sensor at a fixed voltage for a fixed Drain sensor Indoor controller board temperature to the one before energizing and judges whether the sensor is in CN21 the air or in the water E Basic control system While drain pump is turned on it will repeat the following control system and judge whether the sensor is in the air or in the water duration After energizing the circuit board compares the drain sensor s Timing of energizing drain sensor Stand by for Stand by for a minute Detect the temperature before energizing TO Detect the Judge whether temperature the sensor is in after the air or in the energizing water T1 Drain sensor temperature rise t Temperature of drain sensor before current is applied To Temperature of drain sensor after current is applied T1 t T To 4 Vane 1 Initial setting Start at COOL mode and horizontal vane 1 up down vane change 2 Vane position Horizontal Downward A Downward B Downward C Swing Only 1 Hr 1 appears on the 3 Restriction of the downward vane setting wired remote When setting the downward vane A C in Medium1 Medium2 or Low of controller the fan speed notch the vane changes to horizontal position after 1 hour has passed OC341F 16
53. rature 2 F Thermo ON Room temperature desired temperature Thermo OFF Controlled by the remote controller 4 speed Priority is given to below mentioned control mode 2 1 Stand by hot adjust mode 2 2 Preheating exclusion mode 2 3 Thermo OFF mode When the compressor off by the thermostat 2 4 Cool air prevention mode Defrosting mode 2 1 Stand by hot adjust mode The fan controller becomes the stand by hot adjust mode for the following conditions When starting the HEAT operation When the thermostat function changes from OFF to ON When releasing the HEAT defrosting operation Hot adjust mode 1 7 1 STAND BY Set fan speed by the remote controller will be displayed during the stand by hot adjust mode Extra Low Stand by hot adjust mode start B 5 minutes have passed since the condition A or the indoor liquid pipe temperature turned 95 F or more C 2 minutes have passed since the condition A Terminating the stand by hot adjust mode 2 2 Preheating exclusion mode 1 This control is same for the model without auxiliary heater When the condition changes the auxiliary heater ON to OFF thermostat or operation stop etc the indoor fan operates in Low mode for 1 minute To be continued to the next page OC341F 19 From the preceding page Control modes 2 Fan 3 Drain pump 4 Vane control Up down vane change Control details 2 8 Thermo OFF
54. rd side and the relay connector are different follow the color of the lead wire OC341F 23 Output pulse signal and the valve operation Output Output Phase 1 2 3 4 1 ON OFF OFF ON Closing a valve 1 2 gt 3 4 1 4 3 2 71 4 The output pulse shifts in above order 2 ON ON OFF OFF When linear expansion valve operation stops all output phase 3 OFF Become EE 4 OFF OFF ON ON At phase interruption or when phase does not shift in order motor Linear expansion valve operation does not rotate smoothly and motor will lock and vibrate When the switch is turned on 2200 pulse closing valve signal will be sent till it goes to point in order to define the valve position When the valve moves smoothly there is no sound or vibration E occurring from the linear expansion valves however when the 5 pulse number moves from 6 to 9 or when the valve is locked more sound can be heard than in a normal situation S Close o amp Sound can be detected by placing the ear against the screw driver handle while putting the screw driver tip to the linear expansion 5 Open valve 2000 pulse Opening a valve all the way Pulse number Extra tightening 80 100pulse Troubleshooting Symptom Operation circuit failure of the micro processor Ch
55. re rises after self heating the sensor This process is performed if any of the following conditions is satisfied Drain pump is ON Indoor piping liquid piping temperature indoor room temperature 18 F Indoor piping liquid piping temperature or indoor room temperature is at the short or open level temperature Every 1 hour after the drain pump has been switched from ON to OFF 3 Vane Same as the control performed during the COOL operation but with no restriction up down vane change on the vane s downward blow setting 18 8 4 HEAT OPERATION a How to Press POWER ON OFF button MITSUBISHI ELECTRIC Press the operation MODE button to display HEAT S Press the TEMP button to set the desired temperature Pall NOTE The set temperature changes 2 F when the C4 button is pressed once Heating 63 to 83 F eC lt Display in HEAT operation gt Opono OMENU oono ful 4 mR BACK SDAY G 2 DEFROST S The DEFROST symbol is only displayed during the defrost operation STANDBY The STANDBY symbol is only displayed during hot adjust mode Control modes Control details 1 Thermostat 1 1 Minimum compressor off cycle is 3 minutes function Room temperature desired tempe
56. the ceiling opening or parallel to the angle between the wall and the ceiling 2 Check that the 4 points where the grille will be secured are in contact with the ceiling surface 3 Check that the insulation for the refrigerant pipes drain age pipes etc is in place and that wiring connections and arrangements are complete Figure 2 Points for securing the grille String for dropping prevention Figure 3 Figure 5 Points for securing the grille Make sure these surfaces are flush with each other 0 3 mm pan Ceiling surface 31 OC341F OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS Removing the grille 1 Open the intake grille by pressing PUSH of the air intake grille and remove the air filter x 2 See Figure 1 2 Remove the screw cover in the middle of the air outlet See Figure 7 3 Open the upper and lower flaps on the indoor unit com pletely See Figure 7 4 Remove the securing screws x 7 amp M5 x 0 8 x 16 6pcs 8 4 x 16 1pc 5 Remove the temporary holding tabs on the grille to the hooks on the indoor unit Attaching the grille 1 Open the upper and lower flaps on the indoor unit com pletely 2 Hook the temporary holding tabs on the front panel to the hooks
57. ut SW1 5 OFF Thermostat ON SW1 5 ON 2 9 Cooling Dry status lamp 12VDC Heating status lamp 12VDC LX CN31 Drain sensor DS Linear expansion valve LEV 12VDC pulse output CN20 Room thermistor Liquid TH21 CN44 Pipe temperature thermistor Liquid TH22 thermistor Gas TH23 CN27 Damper 12VDC CN24 External heater 12VDC except PMFY P NBMU E 2 CN51 Centrally control Control signal 12VDC pulse input 9 05 Operation indicator 12VDC 9 Malfunction indicator 12VDC 9 4 2 Address board PMFY PO6NBMU E PMFY PO6NBMU E 2 PMFY PO6NBMU ER3 PMFY PO6NBMU ER4 5 SW1 Function setting SW12 Address setting 10ths DIGIT 1 1 PMFY PO8NBMU E 2 PMFY PO8NBMU ER3 PMFY PO8NBMU ER4 PMFY PO8NBMU ER5 SW5 Voltage selector PMFY P12NBMU E PMFY P12NBMU E PMFY P12NBMU E 2 PMFY P12NBMU ER3 PMFY P12NBMU ER4 PMFY P12NBMU ER5 PMFY P15NBMU E PMFY P15NBMU E PMFY P15NBMU E 2 PMFY P15NBMU ER3 PMFY P15NBMU ER4 PMFY P15NBMU ER5 E 381 o 240 5010 ooo aa SEU Oy 1004 194 7 riy 2 5 eeeeooco Address setting 1s DIGIT SW14 Branch No 30 10
58. whether or not the drain sensor is submerged based on the amount the temperature rises after self heating the sensor This process is performed if any of the following conditions is satisfied Drain pump is ON Indoor piping liquid piping temperature indoor room temperature 14 F except during defrosting Indoor piping liquid piping temperature or indoor room temperature is at the short or open level temperature Every 1 hour after the drain pump has been switched from ON to OFF 21 9 TROUBLESHOOTING 9 1 HOW TO CHECK THE PARTS PMFY PO6NBMU E PMFY P12NBMU E PMFY P15NBMU E PMFY PO6NBMU E 1 PMFY P12NBMU E PMFY P15NBMU E PMFY POGNBMU EZ2 PMFY POSNBMU EZ2 PMFY P12NBMU E 2 PMFY P15NBMU E 2 PMFY POGNBMU ER3 PMFY POSNBMU ER3 PMFY P12NBMU ER3 PMFY P15NBMU ER3 PMFY PO8NBMU ER4 PMFY P12NBMU ER4 PMFY P15NBMU ER4 PMFY POGNBMU ER5 PMFY POSNBMU ER5 PMFY P12NBMU ER5 PMFY P15NBMU ER5 Parts name Check points Thermistor TH21 Room temperature detection Thermistor TH22 Liquid pipe temperature detection Thermistor TH23 Gas pipe temperature detection Disconnect the connector then measure the resistance with a tester At the ambient temperature 50 F 86 F Normal Abnormal 4 3kQ 9 6kQ Refer to the next page for the details Open or short Vane motor
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