Service Manual
Contents
1. Control modes 1 Thermostat function OCH515 Control details 1 1 Thermostat function Function to prevent restarting for 3 minutes e Room temperature lt desired temperature 2 F Thermo ON Room temperature lt desired temperature Thermo OFF By the remote controller setting switch of 3 soeeds Auto Type Fan speed notch 3 speeds Auto type Low Mid High Auto When Auto is set fan speed is changed depending on the value of Desired temperature Room temperature Give priority to under mentioned controlled mode 2 1 Hot adjust mode 2 2 Residual heat exclusion mode 2 3 Thermo OFF mode When the compressor off by the thermostat 2 4 Cool air prevention mode Defrosting mode 2 1 Hot adjust mode The fan controller becomes the hot adjuster mode for the following conditions When starting the HEAT operation When the thermostat function changes from OFF to ON When release the HEAT defrosting operation i Hot adjust mode 1 1 STAND BY will be displayed during the hot adjust mode Set fan speed by the remote controller Low Extra Low A Go EEN B A Hot adjust mode starts 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 B Terminating the hot adjust mode 2 2 Residual heat exclusion mode When the condition changes the auxiliary heater ON to OFF the2. OC OC OC OO os H AMPM cui OO LILI LILI NOT AVAILABLE o pex ar eA Bi display SET TEMP display indicates the set desired emperature CLOCK display Displays the current time TIMER display Displays when in timer operation or when setting timer Di 4 55 ee 1 DI display Displays the order of timer operation o4 O O display Displays whether timer is on or off H button SET TEMPERATURE button sets any desired room temperature TIMER CONTROL buttons AUTO STOP OFF timer when this switch is set the air conditioner will be automatically stopped at the preset time AUTO START ON timer when this switch is set the air conditioner will be automatically started at the preset time h and min buttons Buttons used to set the hour and minute of the current time and timer settings LOUVER button Changes left right airflow direction Not available for this model CLOCK button RESET button SET button e Wired remote controller 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
3. Fan Type x Quantity Line flow fan x 1 External static press 0 0 Motor type DC motor Motor output 0 030 Driving mechanism Direct drive Airflow rate Low Mid High 9 10 5 11 7 150 175 195 320 370 413 9 10 5 11 7 150 175 195 320 370 413 9 10 5 11 7 150 175 195 320 370 413 9 10 5 12 150 175 200 320 370 425 Noise level Low Mid High measured in anechoic room 34 39 43 34 39 43 34 39 43 36 41 45 Insulation material Polyethy ene sheet Air filter PP honeycomb Protection device Fuse Refrigerant control device LEV Connectable outdoor unit R410A R22 CITY MULTI Diameter of Liquid R410A mm in refrigerant pipe R22 96 35 91 4 96 35 o1 4 Flare Flare 906 35 91 4 Flare 06 35 1 4 Flare 06 35 91 4 Flare 96 35 91 4 Flare 96 35 01 4 29 52 93 8 Flare Flare 3 Gas R410A R22 mm in 912 7 91 2 912 7 91 2 Flare Flare 12 7 01 2 Flare 012 7 01 2 Flare Flare 012 7 g1 2 Flare 912 7 91 2 012 7 91 2 015 88 05 8 Flare Flare 3 Field drain pipe size mm in LD 16mm 5 8 Standard Document Installation Manual Instruction Book attachment Accessory Optional parts External
4. and 3 of the fan connector Vec DC15V 4 lt Is the voltage normal gt No 5 C Indoor controller board fuse check v No Is the fuse normal gt Replace the fuse M OK y Check the operation gt END e Sensor signal check S NG Replace indoor controller board e OK Measure the voltage between CNMF and DC 0V vy and DC 15V in the indoor controller circuit board Check the operation gt END VY VNG Does the voltage repeat s e Replace the fan mot 3 eplace the fan motor DC 0V and DC 15V p Y Yes Replace indoor controller board GC Replace the fan motor E Y o K M OK Check the operation gt END SE V NG Y NG Replace indoor controller board C Replace the fan motor E OCH515 17 7 2 Function of Dip switch PKFY POSNHMU E2 PKFY P12NHMU E2 PKFY P15NHMU E2 PKFY P18NHMU E2 Operation by switch Switch Function Effective ON OFF timing Remarks SW1 Mode selection Thermistor lt Room temperature position Built in remote controller Indoor unit Filter clogging detection Provide Not provide Filter cleaning sign 2 500 hr 100 hr Fresh air intake 2 Not effective Not effective Switching remote controller display Thermo ON signal indication Fan o
5. 1 INTAKE iz ON o o CN20 t 107 e UT RED 2 1 P18 i atn LED2 123456 4 M NET MARR O S SW2 SW4 sw3 CN2M BLU oy BLU ADDRESS 9 Qoo CN43 OFF NAS fo 1 2 123456 1234 12345678 1 3 RED o elim Z z Gw T a m 6 ON 3g joel 913 babii E ens See fig TB15 12845678910 SWA RED ell LM ge d MA REMOTE SWi2 gw swi4 o CONTROLLER SEL sir pun o 2 DC8 7 13V VT wf Ga Mi TO OUTDOOR UNIT i 3D ATE S ua BG CONTROLLER iOhs s BRANCH REMOTE CONTROLLER DIGIT DIGIT No S AJ DC24 30V AB TB5 NOTES 1 At servicing for outdoor unit always follow the wiring diagram of outdoor unit 2 In case of using MA Remote controller please connect to TB15 Remote controller wire is non polar 3 In case of using M NET please connect to TB5 Transmission line is non polar 4 Symbol S of TB5 is the shield wire connection 5 Symbols used in wiring diagram above are terminal block o o oJ connecter 6 The setting of the SW2 dip switches differs in the capacity For the detail refer to the fig 1 X2 Use copper supply wires LED on indoor board for service Mark Meaning Function Main power supply Indoor unit 208 230V Power on lamp is lit Power supply for Power supply for MA Remote controller MA Remote controller on lamp is lit LED1 Main power supply LED2 OCH515 8 5 REFRIGERANT SYSTEM DIAGRAM PKFY PO8NHMU E2 PKFY P12NHMU E2
6. as trouble might be caused by the usage condition Sw4 Model selection switch to the initial setting ON 12 OCH515 which is shown below 3 4 In case of replacing the indoor controller board make sure to set the 18 Indoor controller board Operation by switch Effective timing Remarks Rotary Switch SW12 SW11 AY 7 EE SE SE T NA C 9 6 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 No Setting Rotary switch 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 Before power Supply ON Address board Initial setting SW12 SWhl1 m Ee Address board Initial setting SW14 Se oy J41 J42 Wireless remote controller Pair No OCH515 To operate each indoor unit by each remote controller when installed 2 indoor units or more are near Pair No setting is necessary Pair No setting is available with the 4 patterns Setting patterns A to D Make setting for J41 J42 of indoor controller board and the Pair No of wireless remote controller You may not set it when operating it by one remote controller Setting for indoor unit Cut
7. 32 F or less in 16 minutes from compressors start up anti freezing control starts and the thermo 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 50 F or above The condition of the thermo OFF has become complete by thermostat etc The operation modes became mode other than COOL The operation stopped By the remote controller setting switch of 3 speeds Auto Type Fan speed notch 3 speeds Auto type Low Mid High Auto When Auto is set fan speed is changed depending on the value of Room temperature Desired temperature 3 Vane 1 Initial setting Start at COOL mode and horizontal vane ONLY 1 Hr up down vane change 2 Vane position appears on the Horizontal Downward A Downward B Downward C Downward D Swing Auto wired remote 1 controller 3 Restriction of the downward vane setting When setting the downward vane A B C or D in Mid Low or Auto of the fan speed notch the vane changes to horizontal position after 1 hour have passed OCH515 10 6 2 DRY OPERATION A MITSUBISHI ELECTRIC How to operate UTE Press POWER ON OFF button G Press the operation MODE button to display DRY AFTER Hr ID AFTER OFF SS e
8. PKFY P15NHMU E2 PKFY P18NHMU E2 Gas pipe thermistor TH23 Strainer 50mesh x H Gas pipe Flare connection Heat exchanger D d Liquid pipe Linear expansion valve Room temparature thermistor TH21 Strainer1 50mesh Strainer2 100mesh Strainer 100mesh Unit mm inch Service Ref PKFY P08 12 15 18NHMU E2 Item Gas pipe 12 7 1 2 Liquid pipe 6 35 1 4 OCH515 9 6 MICROPROCESSOR CONTROL INDOOR UNIT CONTROL 6 1 COOL OPERATION A MITSUBISHI ELECTRIC How to operate men HEP UI a EE Press POWER ON OFF button pi p v il GPress the operation MODE button to display COOL Ly H ol 38 4 O Press the TEMP button to set the desired temperature Q ONOFF NOTE The set temperature changes 2 F when the or 2 button is oC pressed one time Cooling 67 to 87 F Choose MENU oniorr al Ts FILTER 24 7 694 BACK MONTORSET DAY aA ees 8 D I TEST Ce Cad 29 PAR 21MAA CLOCK V OPERATION A CLEAR Control modes Control details Remarks 1 Thermostat 1 1 Thermostat function Function to prevent restarting for 3 minutes function e Room temperature 2 desired temperature 2 F Thermo ON e Room temperature desired temperature Thermo OFF 1 2 Anti freezing control Detected condition When the liquid pipe temp TH22 is
9. Screw side cover Holder of wireless controller board Indoor controller board I B 2 lt Fixture right 4 REMOVING THE ELECTRICAL BOX Remove the front panel Refer to procedure 2 Remove the electrical box covers See Photo 3 Remove the nozzle assembly Refer to procedure 5 4 Disconnect the transmission wiring of TB5 5 Disconnect the power supply wiring of TB2 6 Disconnect the wiring of MA remote controller TB15 7 Disconnect the connectors on the indoor controller board 8 Disconnect the connector for the ground wire See Photo 5 9 0 1 1 2 3 Pull the disconnected lead wire out from the electrical box Remove the screw of electrical box See Photo 6 Push up the upper fixture See Photo 5 catch to remove the box then pull the right fixture See Photo 4 and remove it from the box fixture Photo 5 Connector for ground wire Photo 6 Screw Electrical box H Fixture upper OCH515 23 OPERATION PROCEDURE 5 REMOVING THE NOZZLE ASSEMBLY with VANE and VANE MOTOR AND DRAIN HOSE 1 Remove the front panel Refer to procedure 2 2 Remove the electrical box cover 3 Disconnect the vane motor connector CN151 on the indoor controller board 4 Remove the corner box 5 Pull the nozzle assembly and detach 6 Push the fixture and remove the drain hose 6 REMOVING THE INDOOR FAN MO
10. Vane motor with limit switch add MSFBC20 DC12V Linear expansion valve LEV DC12V Stepping motor drive Port 3 2 0 2000pulse P inal dd supply termina TB2 L1 L2 GR 250V 20A Transmission terminal TB5 M1 M2 S 250V 20A block MA remote controller terminal block Me 1 2 250V 10A 2 3 Sound levels Sound level at anechoic room Low Middle High Service Ref Sound level dB A PKFY POBNHMU E2 PKFY P12NHMU E2 34 39 43 PKFY P15NHMU E2 PKFY P18NHMU E2 36 41 45 E eL 3 3 ft Measurement location 1m Measured in anechoic room 2 4 NC curves PKFY P08 12 15NHMU E2 External static pressure OPa External static pressure OPa Power source 208 230V 60Hz b Power source 208 230V 60Hz Oe p m i bs cux High ERR Middle speed 77777 Lowspeed Low speed 20uPa 2 8 S 20uPa 8 S 2 St o 55 0 NC60 55 0 NC60 NC5O NC50 4 NC40 NC40 NC30 N Ne3o Approximate Minimum 20 0 f audible limit on continuous noise Approximate minimum N 15 0 audible limit on continuous noise L ji 63 125 250 500 1k 2k 4k 8k 63 125 250 500 1k 2k 4k 8k NC20 OCTAVE BAND PRESSURE LEVEL dB 0dB N OCTAVE BAND PRESSURE LEVEL dB 0dB 7 T OCTAVE BAND CENTER FREQUENCIES Hz OCH515 OCTAVE BAND CENTER FREQUENCIES Hz
11. controller board I B Operation indicator 12VDC Malfunction indicator 12VDC 7 3 2 Wireless remote controller board PKFY PO8NHMU E2 PKFY P12NHMU E2 PKFY P15NHMU E2 PKFY P18NHMU E2 LD101 Connect to the indoor controller board I B D Coupe BH006713 w 7 3 3 Address board PKFY PO8NHMU E2 PKFY P12NHMU E2 PKFY P15NHMU E2 PKFY P18NHMU E2 SW1 Function setting 220V JP1 240V DN HE CNAS cens EL a Sg ooo QG MED MR sw lo amp soos 7 282 O 9009099990 ax Y SW12 SW11 SW14 Address setting Address setting Branch No 10ths DIGIT 1s DIGIT OCH515 21 8 DISASSEMBLY PROCEDURE PKFY PO8NHMU E2 PKFY P12NHMU E2 PKFY P15NHMU E2 PKFY P18NHMU E2 OPERATION PROCEDURE PHOTOS amp ILLUSTRATIONS Be careful when removing heavy parts 1 REMOVING THE LOWER SIDE OF THE INDOOR UNIT FROM THE INSTALLATION PLATE Figure 1 1 Remove the front panel 2 Insert the screw driver to the corner hole at both left and right side as shown in the figure 1 3 Push it up then pull down the lower side of indoor unit and remove the hook Corner hole Be careful not to damage the airflow adjustment 1 1 plate with the screw driver Push Down 2 REMOVING THE FRONT PANEL Photo 1 1 Press and unlock the knobs on both sides of the front panel and lift the fron
12. hal ES 3 KEE Q Press the TEMP button to set the desired temperature DONOFF NOTE The set temperature changes 2 F when the vor button is SS pressed one time Dry 67 to 87 F D ser OMENU onge ul Ts FILTER 3 gt COa BACK MONTORSET DAY SE 28 14 CHECK TEST CG C4 EK 39 PAR 21MAA CLOCK V OPERATION A CLEAR Control modes Control details 1 1 Thermostat function Function to prevent restarting for 3 minutes fs IRIURE Setting the Dry thermo by the thermostat signal and the room temperature TH21 function Dry thermo ON Room temperature 2 desired temperature 2 F Dry thermo OFF Room temperature z desired temperature 3 min passed since starting operation Room el Thermostat signal Room temperature T1 T12 83 F 83 F gt T1 2 79 F Over 64 F 79 F gt T1 75 F 75 F T1 ON Less than 64 F Dry thermo OFF 1 2 Freeze prevention control No control function Indoor fan operation controlled depending on the compressor conditions Dry thermo Fan speed notch Excluding the following Note Remote controller setting is not acceptable 3 Vane Same control as COOL operation up down vane change OCH515 11 6 3 FAN OPERATION How to operate A MITSUBISHI ELECTRIC Press POWER ON OFF button me AE HE ta IER Press
13. heater adapter PAC YU25HT Remarks Installation Details on foundation work insulation work electrical wiring power source switch and other items shall be referred to the Installation Manual Indoor Outdoor Pipe length Level difference Due to continuing improvement above specification may be subject to change without notice OCH515 1 Nominal cooling conditions 2 Nominal heating conditions 80 FDB 67 FWB 26 7 CDB 19 4 CWB 70 FDB 21 CDB 47 FDB 43 FWB 8 3 CDB 6 1 CWB 95 FDB 35 CDB 25 ft 7 6 m 0 ft 0 m 25 ft 7 6 m 0 ft 0 m 8 Connect the joint purchased locally for R22 Unit converter kcal h kW x 860 Btu h kW x 3 412 cfm m min x 35 31 Ib kg 0 4536 Above specification data is subject to rounding variation 2 2 Electrical parts specifications Service Ref Symbol PKFY PO8NHMU E2 PKFY P12NHMU E2 PKFY P15NHMU E2 PKFY P18NHMU E2 Parts name e THo1 Resistance 30 F 15 8kQ 50 F 9 6kQ 70 F 6 0kQ 80 F 4 8kQ 90 F 3 9kQ 100 F 3 2kQ Liquid pipe thermistor TH22 Resistance 30 F 15 8kQ 50 F 9 6kQ 70 F 6 0kQ 80 F 4 8kQ 90 F 3 9kQ 100 F 3 2kQ Gas pipe thermistor IHo4 Resistance 30 F 15 8kQ 50 F 9 6kQ 70 F 6 0k 80 F 4 8kQ 90 F 3 9kQ 100 F 3 2k0 Fuse Indoor controller board FUSE 250V 3 15A Fan motor MF 8 Pole Output 30W RCOJ30 CK
14. s box Display Section For purposes of this explanation all parts of the display are shown as lit During actual operation only the relevant items will be lit Identifies the current operation Shows the operating mode etc Multilanguage display is available Day of Week Shows the current day of the week 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 Displayed when the remote controller sensor is used Locked indicator Indicates that remote controller but tons have been locked A MITSUBISHI ELECTRIC TIME SUN_MON TUE_WED_THU FRI SAT TER f fi f j ij e oy AFTER L L I gt CT AFTER or ERROR CODE 777 ul L Centrally Controlled indicator od SNNT TN F C s Indicates that operation from the remote controller has been prohib ited by a master controller IO ONC er n ONLY1Hr FILTER WEEKLY SIMPLE AUTO OFF el 39 Clean The Filter indicator To be displayed on when it is time to clean the filter Timer indicators The indicator comes on if the corre sponding timer is set T
15. 16 Screw side cover Electrical box cover top Electrical box cover side Room temp thermistor TH21 Screw top cover Water cover Thermistor holder Screw side cover Nozzle assembly Switch holder Holder of wireless controller board Photo 13 Screw top cover Water cover Nozzle assembly Photo 14 Heat exchanger Photo 15 Terminal block TB2 Terminal block TB5 Terminal block TB15 PHOTOS Screw side cover Electrical box cover top Electrical box cover side Room temp thermistor TH21 Thermistor holder Screw side cover Switch holder Holder of wireless controller board Ground wire LEV Indoor controller board 1 B lt Fixture right Room temp thermistor TH21 OCH515 25 CITY MULTI MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Apr 2012 No OCH515 New publication effective Apr 2012 Made in Japan Specifications are subject to change without notice
16. 3 OUTLINES AND DIMENSIONS Unit inch mm gd 15 3 16 387 e 1 12 192 PKFY PO8NHMU E2 1 Top side PKFY P12NHMU E2 e PKFY P15NHMU E2 e S E PKFY P18NHMU E2 3 Mount board 23 9 16 599 P ul Front side Right side Ii amp I Y Left side ES 27 1 16 688 6 1 16 155 3 3 8 249 55 Knockout hole 4 35 5 16 898 for left piping k 898 Gite Front side Grille open Sl purchased locally Through hole 42 1 2 d3 1 8 d2 1 2 d3 1 8 965 480 665 480 T Terminal block for power supply Ke ee ey 2 Terminal block for transmission Terminal block for EIE MA remote controller 17 15 16 457 Gas pipe 6 5 8 169 Emergency operation sw
17. Changes for the Better MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS April 2012 No OCH515 TECHNICAL amp SERVICE MANUAL CITY MULTI Series Wall Mounted R410A R22 Indoor unit Model names Service Ref Note l This manual describes PKFY PO8NHMU E2 D KFY P 08 N H M U E2 only service data of the indoor units PKFY P12NHMU E2 RoHS compliant products um have lt G gt mark on the spec name plate s PKFY P15NHMU E2 m PKFY P18NHMU E2 PKFY P1 HN H MU E2 CONTENTS 1 PART NAMES AND FUNCTIONS 2 2 SPECIFICATION a r a T 5 3 OUTLINES AND DIMENSIONS 7 4 WIRING DIAGRAM HH mIHARHM eHBeBeB 8 8 5 REFRIGERANT SYSTEM DIAGRAM 9 Saas 6 MICROPROCESSOR CONTROL 10 INDOOR UNIT 7 TROUBLESHOOTING 15 8 DISASSEMBLY PROCEDURE e71 22 PARTS CATALOG OCB515 ER 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 inst
18. F Refer to 7 1 3 Linear expansion valve LEV cweg White 1 Yellow Disconnect the connector then measure the resistance value with a tester Coil temperature 68 F Normal Abnormal 7 1 1 Thermistor 1 5 White Red 2 6 Yellow Brown 3 5 Orange Red 2002 10 4 6 Blue Brown Open or short lt Thermistor characteristic graph gt Thermistor for lower temperature gt 50 Thermistor for Room temperature thermistor TH21 lower temperature Thermistor Ro215kQ 3 Fixed number of B 3480 2 Rt 15exp 3480 1 30 15 8kQ 50 9 6kO 70 6 0kO 80 4 8kO 90 F 3 9kO 100 3 2kQ 1 273 t 32 1 8 273 Liquid pipe temperature thermistor TH22 Gas pipe temperature thermistor TH23 TH24 Resistance kQ 40 30 20 0 20 0 20 40 60 80 Temperature F 100 120 7 1 2 Liner expansion valve Operation summary of the linear expansion valve Linear expansion valve open close 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 Controller board T S White Red Orange 6 A DC12V Brown 6 neg S Dr
19. ING UNIT lt 2 gt qe POWER SUPPLY TB2 boa e 208 230V 60Hz RED AL FUSE BREAKER BLU 177 PULL 16a 164 Ee ell TONEXT 3 d dy INDOOR UNIT 8 MF un MV LEV a lala LP CND 66 000 0 o CN52 3 1 1 BLK n 5 1 GRN D xkEED zalzli 00000 u JE B E tei z dE B Gg 5 LT Stop 5 CN51 1 The black square lil indicates 9 9 BLU 66566 656666 66665656 WHT a switch position 1 6 1 a 5 1 6 16 1 CN24 0 0 s FAN VANE CNRU LEV YLW lt fig 1 gt CNMF FUSE k WHT CN60 21 WHT Q amp Q WD LW oo sw Models SW2 XI LEDI CN4F 6609 1 GE POS or en SUE TH24 OFF 8H GAS2 123456 P ON2G 6 t OFF ON 979 4 ON 4 CN32 IA TH23 P12 OF E LIQUID GAS1 t ELE TH22 3 1 CN44 a ON WHT bc t P15 oF ADDRESS ADDRESS 4 1 CN CN42 mus 123456 8 RED 1 4 RED
20. IPE THERMISTOR AND GAS PIPE THERMISTOR 1 2 8 4 5 6 Remove the front panel Refer to procedure 2 Remove the electrical box cover Remove the motor band Cut the wiring fixed band Remove the liquid pipe thermistor and gas pipe thermistors Disconnect the connector CN44 CN2G on the indoor controller board TH22 and TH23 CN44 TH24 CN2G LT JL lI OCH515 24 Photo 12 Gas pipe thermistor TH24 Gas pipe thermistor 92 TH23 amp Liquid pipe thermistor TH22 OPERATION PROCEDURE 9 REMOVING THE HEAT EXCHANGER AND LEV 1 Remove the front panel Refer to procedure 2 and the corner panel at right lower side 2 Remove the electrical box Refer to procedure 4 and the nozzle assembly Refer to procedure 5 3 Remove the motor band 4 Remove the pipe thermistors Refer to procedure 8 5 Disconnect the connector CN60 on the indoor controller board and the connector for ground wire See Photo 5 6 Remove the screws fixing the left side of the heat exchanger See Photo 10 7 Remove the heat exchanger with LEV 10 REMOVING THE ROOM TEMPERATURE THERMISTOR 1 Remove the front panel Refer to procedure 2 2 Remove the electrical box cover 3 Remove the room temperature thermistor 4 Disconnect the connector CN20 on the indoor controller board NOTE When room temp thermistor is replaced be sure to use service parts No R01 N20 202 Photo
21. Speed button Filter 41 button ON OFF oC 2 I Zu T FILTER Coa MONITORISET DAY oe 2 NM CHECK TEST lt Enter gt button Test Run button qan e fc Cv CA PAR 21MAA CLOCK Check button Clear button Airflow Up Down button V OPERATION A CLEAR Opening the cover JER OCH515 Louver button V Operation button To return operation number Built in temperature sensor Ventilation button A Operation button CA To go to next operation number 2 SPECIFICATION 2 1 Specifications Service Ref PKFY PO8NHMU E2 PKFY P12NHMU E2 PKFY P15NHMU E2 PKFY P18NHMU E2 Power source 1 phase 208 230V 60Hz Cooling capacity Nominal 3 5 12 000 4 4 15 000 5 3 18 000 Power input 0 03 0 03 0 03 Current input 0 30 0 30 0 30 Heating capacity Nominal 4 0 13 500 5 0 17 000 5 9 20 000 Power input 0 03 0 03 0 03 Current input 0 30 0 30 0 30 External finish Plastic MUNSELL 1 0Y 9 2 0 2 External dimension H x W x D 295 x 898 x 249 11 5 8 x 35 3 8 x 9 13 16 Net weight 13 29 Heat exchanger Cross fin Aluminum fin and copper tube
22. TOR AND THE LINE FLOW FAN 1 Remove the front panel Refer to procedure 2 and the corner box at right lower side 2 Remove the electrical box Refer to procedure 4 and the nozzle assembly Refer to procedure 5 3 Remove the screws fixing the motor bed See Photo 8 4 Loosen the screw fixing the line flow fan See Photo 9 5 Remove the motor bed together with fan motor and motor band 6 Release the hooks of the motor band Remove the motor band Pull out the indoor fan motor PHOTOS Electrical box cover side Photo 7 Electrical box cover top Screw side cover Screw Nozzle assembly Holder of wireless controller board Screw side cover Fan motor Motor band Photo 8 Heat exchanger Screw of the motor bed Photo 9 HURRY 7 Remove the screws fixing the left side of the heat exchanger NN See Photo 10 zg 8 Lift the heat exchanger and pull out the line flow fan to the i lower left SEA Screw of the Photo 10 E d line flow fan left side of the us heat exchanger i y kl Screws of the vane motor unit REMOVING THE VANE MOTOR Photo 11 1 Remove the nozzle assembly Refer to procedure 5 2 Remove the screws of the vane motor unit and pull out the vane motor unit 3 Remove the screws of the vane motor unit cover 4 Remove the vane motor from the vane motor unit 5 Disconnect the connector from the vane motor REMOVING THE LIQUID P
23. e thermistor will go lower If the detected expansion temperature is much lower than the tem valve 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 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 16 7 1 3 DC Fan motor fan motor indoor controller circuit board Check method of DC fan motor fan motor indoor controller circuit board O Notes High voltage is applied to the connecter 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 It causes trouble of the indoor controller circuit board and fan motor Self check Symptom The indoor fan cannot turn around Wiring contact check Contact of fan motor connector CNMF 4 4 Is there contact failure 2 gt Yes gt J No Power supply check Remove the connector CNMF Measure the voltage in the indoor controller circuit board TEST POINT o Voc between 1 and 3 of the fan connector Voc DC294 325V TEST POINT Vcc between 4
24. emote controller connecting wire 8 7 13V DC Pin Gu OCH515 CNMF Connect to the fan motor MF DC294 32 DC15V DC0 6V 5V DCO or DC15V Stop DC7 5V Operation 12VDC pulse cyYos cvos o ond CHE HD 2 o e Joints RAO31 RGIA 9 9 9 0 L1 KREESSER RG00V672 L1 0 D RG00V916 7 o IRAo06 o o a r N D ED CAUTION FUSE 3 15A 250V CND Power supply for indoor controller board 208 230VAC LED1 Main power supply Indoor unit 208 230VAC CN151 Vane motor output 12VDC pulse output CNRU Connect to the wireless remote controller board W B LDSWE A Connect to the wireless remote controller board S B EN SES m CN60 Liner expansion valve LEV output 12VDC pulse output 00000 Fr CN32 M Remote switch CN20 Room temperature thermistor TH21 CN44 Pipe temperature thermistor Liquid TH22 Gas1 TH23 CN2G Pipe temperature thermistor Gas2 TH24 CN24 External heater 12VDC CN52 Remote indicator Status lamp 12VDC O Fan motor output SW1 5 OFF Thermostat ON SW1 5 ON Cooling Dry status lamp 12VDC Heating status lamp 12VDC 20 CN51 Centrally control LD SWE B Control signal Connect to the indoor 12VDC pulse input
25. imer is Off indicator Fan Speed indicator Shows the selected fan speed Up Down Air Direction indica Room Temperature display tor Indicates that the timer is off Temperature Setting Shows the target temperature Operation Section Temperature setting buttons Cv Down CA Up Timer Menu button The indicator shows the direc tion of the outcoming airflow Shows the room temperature The room temperature display range is 46 102 F The display blinks if the temperature is less than 46 F or 102 F or more Ventilation indicator Appears when the unit is running in Ventilation mode One Hour Only indicator Displayed if the airflow is set to Louver display Low or downward during COOL or DRY mode Operation varies according to model Indicates the action of the swing louver Does not appear if the louver is not running The indicator goes off in one hour at which time the airflow direction Power On indicator also changes Indicates that the power is on ON OFF button RA MITSUBISHI ELECTRIC Monitor Set button Mode button Return button Set Time buttons CD bax CA Ahead Timer On Off button Set Day button L Bren GEIER Cd cc 3se OMENU ON OFF Fan
26. itch 21 3 16 539 Liquid pipe 6 3 16 158 cooling heating 24 610 Drain hose 7 3 16 184 Vane auto Undies side Operation lamp DEFROST STAND BY lamp PS 24 1 16 612 amp lt gt o 6 i 1 4 D in Liquid pipe 1 4F 46 35 T Piping Gas pipe 1 2F 12 7 Knockout hole Drain hose deg 16 LD for lower piping H A n Ps ee i Louver manual Knockout hole Receiver for lower piping Center measurement hole 43 32 2 5 4 45 16 49 Bolt hole Mount board a ge e a a E x ei SE Rod mo Oo ot Indoor unit outline 77 93 16 65 1 SBR os SS Tapping G SS g n 6 screw hole TSIM ce 5n ays i o Jp qe STEIER TTT 13 16 21 8 5 8 18 3 0 1 1 16 2 gs m S Sr NR 1918641 zz IY ia RISEN 3 1 16 78 5 i vide LL es ee Sh BEIEN 3 9 16 91 Cen SS ares 1 2 9 16i 66 4 1 16 103 5 i I aS z Fe gis EHE 4 9 16 116 H SS SS 1 5 128 5 6 1 2 166 l Esa 2 oe oP i 6 153 5 7 178 5 i i H 28828 CT U SES KE 1 Gate gt t 31 9 1 16 231 5 9 15 16 253 5 1 H IX Ei Le ER Lt BE E c MENO LL 0g 110 3 4 273 2 ks Ae Satz 2 s F d g E Wall hole for EY E SE Knockout hole for g E left rear piping CN rear piping o Led ied Rel Fe amp 2 3 4x12 3 16 70x310 3 M Reus Ding E b 5 E Z oh Knockout hole for piping Required space Indoor unit A e 8 H 4 E H Airinet 4 i dr TS z z SC y 7 16 12 5 2 3 16 56 c g D J Air inlet zx 5 8 1 11 16 43 1 CG Si Mx
27. ive circuit o4 Blue 4 KZ d oe 3 i 03 Orange 3 i lt o2 Yellow 2 o2 M by o lt 1 White 1 WA OCH515 15 A Connector CN60 S Output pulse signal and the valve operation Output Phase di 2 3 Closing a valve 152 534 1 Opening a valve 4 35 25 1 4 The output pulse shifts in above order Note When linear expansion valve operation stops all output phase become OFF 4 OFF ON At phase interruption or when phase does not shift in order motor does not rotate smoothly and motor will lock and vibrate Linear expansion valve operation m A f When the switch is turned on 2200 pulse closing valve signal will Open 4 be sent till it goes to point amp in order to define the valve position When the valve moves smoothly there is no sound or vibration occurring from the linear expansion valves however when the pulse number moves from to amp or when the valve is locked Sg more sound can be heard than in a normal situation 8 Sound can be detected by placing the ear against the screw driver S ei handle while putting the screw driver tip to the linear expansion 5 n valve amp 2 S A Outdoor unit R410A model 1400 pulse amp Outdoor unit R22 model 2000 pulse Opening a valve all the way Se S Y close NGO Pulse number Extra tightening 200 800 pulse Troubleshooting OCH515 Symptom Check poi
28. jumper wire J41 J42 on the indoor controller board according to the table below Wireless remote controller pair number Setting operation 1 Press the SET button using a pointed implement Check that the remote controller s display has stopped before continuing MODEL SELECT flashes and the model No 3 digits appears steadily lit Press the MINUTE button twice The pair number appears flashing Press the temperature buttons to select the pair number to set Press the SET button using a pointed implement The set pair number is displayed steadily lit for 3 seconds then disappears Indoor controller jumper wire J41 Pair No of wireless Setting pattern remote controllerx Initial setting x Pair No 4 9 of wireless remote controller is setting pattern D 19 Under operation or suspension lt lnitial setting gt Pattern A Minute button 7 3 TEST POINT DIAGRAM 7 3 1 Indoor controller board PKFY PO8NHMU E2 PKFY P12NHMU E2 PKFY P15NHMU E2 PKFY P18NHMU E2 CN2M Connect to the terminal block TB5 M NET transmission connecting wire 24 30VDC non polar Power supply from outdoor unit SW4 Model selection SW3 Jumper wire J41 J42 Pair No setting for wireless remote controller LED2 Power supply for MA Remote controller CN3A Connected to the terminal block TB15 MA R
29. nts Countermeasures Operation circuit failure of the micro processor Exchange the indoor con troller board at drive circuit failure Disconnect the connector on the controller board then con nect LED for checking 1kQ LED When power is turned on pulse signals will be output for 10 seconds There must be some defects in the operation circuit if the LED does not light while the signals are output or keeps lighting even after the signals stop Exchange the linear expan sion valve 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 Linear expansion valve mechanism is locked 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 200Q 10 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 cud ab is any leaking detecting temperature of Linear th
30. rmostat or operation stop etc the indoor fan operates in Low mode for 1 minute This control is same for the model without auxiliary heater To be continued on the next page 13 From the preceding page Control modes Control details 2 Fan 2 3 Thermo OFF mode When the thermostat function changes to OFF the indoor fan operates in Extra low 2 4 Heat defrosting mode The indoor fan stops 3 Vane control 1 Initial setting OFF HEAT ast setting Up down vane When the last setting is Swing Downward D change When changing the mode from exception of HEAT to HEAT operation Downward D 2 Vane position Horizontal Downward A Downward B Downward C Downward D Swing Auto T 3 Restriction of vane position The vane is horizontally fixed for the following modes The control by the remote controller is temporally invalidated and control by the unit Thermo OFF Hot adjust Extra low mode Heat defrost mode 6 5 AUTO OPERATION AUTOMATIC COOL HEAT CHANGE OVER OPERATION How to operate QPress POWER ON OFF button Press the operation MODE button to display AUTO GPress the TEMP button to set the desired temperature curn 352 o BSE al EE NOTE The set temperature changes 2 F when the Cor C2 button is SPORT pressed one time Automatic 67 to 83 F MCE oC D se OMENU Dono F
31. ructions 1 PART NAMES AND FUNCTIONS e Indoor unit Filter Air intake Louver Air outlet OCH515 2 e Wireless remote controller Cat eh Xt display OPERATION MODE display Operation mode display indicates which operation mode is in effect W display The vertical direction of air flow is indicated 41 display FAN SPEED display indicates which fan Speed has been selected ON OFF button The unit is turned ON and OFF alternately each time the button is pressed FAN SPEED SELECT button Used to change the fan speed MODE SELECT button Used to switch the operation mode between cooling drying fan heating and auto mode In case the outdoor unit is cool only type the heating and auto mode are not available CHECK TEST RUN button Only press this button to perform an inspection check or test operation Do not use it for normal operation VANE CONTROL button Used to change the air flow direction OCH515 CHEN ETH display CHECK and TEST RUN display indicate that the unit is being checked or test run MESEC display Blinks when model is selected display Lights up while the signal is transmitted to he indoor unit when the button is pressed Sal OCs coer sec SS
32. t 7 ME Air outlet Min 8 5 8 in 5 7 8 150 Ui A 1 11 16 43 OCH515 1 3 4 46 2 5 16 60 220 4 WIRING DIAGRAM PKFY POSNHMU E2 SYMBOL NAME SYMBOL NAME LB INDOOR CONTROLLER BOARD TH21 THERMISTOR ROOM TEMP DETECTION PKFY P12NHMU E2 CN24 CONNECTOR EXTERNAL HEATER 82 F 15k0 77 F 5 4kQ CN32 REMOTE SWITCH TH22 PIPE TEMP DETECTION LIQUID PKFY P15NHMU E2 CNS CENTRALLY CONTROL 32 F 15kQ 77 F 5 4kQ CN52 REMOTE INDICATION TH23 PIPE TEMP DETECTION GAS1 PKFY P18NHMU E2 Bzi BUZZER 32 F 15kO 77 F 5 4kQ FUSE FUSE T3 15AL 250V TH24 PIPE TEMP DETECTION GAS2 LED POWER SUPPLY I B 32 F 15kQ 77 F 5 4kQ LED2 POWER SUPPLY I B AB ADDRESS BOARD SW2 SWITCH CAPACITY CODE SWA SWITCH FAN SPEED SELECTOR Suz MODE SELECTION swi MODE SELECTION SW4 MODEL SELECTOR swit ADDRESS SETTING 1s DIGIT SWE DRAIN PUMP TEST MODE swi2 ADDRESS SETTING 10ths DIGIT X1__ AUX RELAY DRAIN PUMP swi4 BRANCH No LEV LINEAR EXPANSION VALVE Sp SWITCH BOARD MF FAN MOTOR SWE1 EMERGENCY OPERATION HEAT MV VANE MOTOR SWE2 EMERGENCY OPERATION COOL TB2 TERMINAL POWER SUPPLY W B PCB FOR WIRELESS REMOTE CONTROLLER TB5 BLOCK TRANSMISSION LED1 LED OPERATION INDICATOR GREEN TB15 MA REMOTE CONTROLLER LED2 LED OPERATION FOR HEATING ORANGE RU RECEIV
33. t panel until it is level Pull the hinges Vanes Front panel forward to remove the front panel See Photo 2 2 Move the horizontal vanes in a downward direction 3 Remove the screw caps of the panel Remove the screws See Photo 1 4 Hold the lower part of both ends of the panel and pull it slightly toward you and then remove the panel by pushing it upward Photo 2 Screw caps OCH515 22 OPERATION PROCEDURE 3 REMOVING THE INDOOR CONTROLLER BOARD AND WIRELESS CONTROLLER BOARD 1 Remove the front panel Refer to procedure 2 2 Remove the electrical box covers screw 4 x 12 See Photo 3 8 Remove the thermistor holder from the electrical box side cover See Photo 3 4 Disconnect the connectors on the indoor controller board 5 Remove the switch board cover 6 Pull out the indoor controller board toward you then disconnect the rest of connectors Remove the indoor controller board and switch board 7 Remove the holder of wireless controller board 8 Disconnect the connector of wireless controller board and remove the wireless controller board from the holder Photo 3 PHOTOS Screw side cover Electrical box Screw top cover Water cover Nozzle assembly Photo 4 Terminal block TB2 Terminal block TB5 Terminal Switch holder cover top he covers box ye cover side Room temp thermistor TH21 Thermistor holder
34. the operation MODE button to display FAN eS E3 cooec S TEE INICIO lacs E B Temp Q ON OFF Cv CA gt Opono OMENU onorr Sal TS purer 23 3C E BACK MONITORISET DAY her med 38 DEN TEST CVD CAD gt O PAR 21MAA CLOCK VOPERATIONA CLEAR i l Control modes Control details Remarks 1 Fan Set by remote controller Fan speed notch 3 speeds Auto type Low Mid High Auto When Auto is set fan speed becomes Low 2 Vane Same as the control performed during the COOL operation but with no restriction Same control up down vane change on the vane s downward blow setting as COOL operation OCH515 12 6 4 HEAT OPERATION How to operate gt Press POWER ON OFF button aha MITSUBISHI ELECTRIC Q amp Press the operation MODE button to display HEAT DO sso EE G Press the TEMP button to set the desired temperature ETS Al NOTE The set temperature changes 2 F when the Gor G button is DANOG Jens 388 a uite pressed one time Heating 63 to 83 F fi temp O ON OFF IA ir EINE Display in HEAT operation BACK MONITORSSET DAY Le amp de DEFROST LAG AMI Di O The DEFROST symbol is only displayed during the defrost operation PAR 21MAA CLOCK VOPERATIONA CLEAR STAN DBY The STANDBY symbol is only displayed during the hot adjust mode
35. ul fs om 2 CO Ou BACK MONITORSET DAY ere eu CHEK TEST Cv CD C0 PAR 21MAA CLOCK VOPERATION A CLEAR Control modes Control details 1 Initial value of HEAT mode for room temperature Desired temperature operation mode COOL mode for room temperature Desired temperature 2 Mode change 1 HEAT mode COOL mode Room temperature 2 Desired temperature 3 F or 3 min has passed 2 COOL mode HEAT mode Room temperature 2 Desired temperature 3 F or 3 min has passed 3 COOL mode Same control as cool operation ERE 4 HEAT mode Same control as heat operation PF OCH515 14 7 TROUBLESHOOTING 7 1 HOW TO CHECK THE PARTS PKFY PO8 12 Parts name 15 18NHMU E2 Check points Room temperature thermistor TH21 Liquid pipe temperature thermistor TH22 Gas pipe temperature thermistor TH23 24 Disconnect the connector then measure the resistance with a tester At the ambient temperature 50 F 86 F Normal 4 3kQ 9 6kQ Abnormal Open or short Refer to the next page for the details Vane motor MV Red amp Yellow CD Brown Orange Green Connect pin No Measure the resistance between the terminals with a tester Coil temperature 77 F Normal Abnormal Brown Red Q G Brown Orange 0 Brown Yellow 350Q 7 RS Brown Green Open or short Fan motor M
36. utput indication Humidifier control Fan operation at Heating mode Thermo ON operation at heating mode Under Suspension Air flow set in case of heat thermo OFF Low 1 Extra low 1 Setting air flow x1 Depends on SW1 7 o oc 2c nm Auto restart function Effective Not effective e Power ON OFF by breaker Effective Not effective Address board Initial setting ON OFF 128456789 10 NOTE ai SWh1 7 SW1 8 Fan speed OFF OFF Extra low ON OFF Low OFF ON Setting air flow ON ON Stop 2 It is impossible to intake the fresh air Models swe Models ON POS OFF 1234 P15 ON P12 123456 P18 Indoor controller board Heat pump Cool only Cooling only Heat pump Not used Not used SW3 Function Vane horizontal angle Second setting 1 First setting Under selection Changing the opening of linear expansion valve during thermo OFF Effective Not effective suspension Heating 4 degree up Not effective Effective Target superheat setting X2 Oo Oo oO1 2 c5 PP Target subcool X2 Indoor controller board Initial setting ON OFF 12345678 x1 Second setting is same as first setting X2 Please do not use SW3 7 8
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