TECHNICAL & SERVICE MANUAL Floor Standing Series PFFY
Contents
1. Swi4 Branch No setting How to set branch number SW14 Series R2 only Initial setting Match the indoor unit s refrigerant pipe with the BC contoller s end connection number Remain other than series R2 at O Rotary switch Connector Setting by connector Remarks Please do not change the setting to SWE Indoor controller board No function ON OFF 20 10 4 TEST POINT DIAGRAM 10 4 1 Indoor controller board PFFY P20VKM E PFFY P20VKM ER1 PFFY P25VKM E PFFY P25VKM ER1 PFFY P32VKM E PFFY P32VKM ER1 PFFY P40VKM E PFFY P40VKM ER1 CND Power supply 220 240V FUSE 6 3A 250V CNMF1 CNMF2 FAN motor upper CNMF1 CNMF2 DC280V CNMF2 15V DC CNMF20O Q 0 6 5V DC CNMF2 0 15V DC FAN motor lower CNMF1 CNMF2 DC280V CNMF2 15V DC CNMF2 0 6 5V DC CNMF2 0 15V DC LED1 gt C jac Le power supply lt CN2M Connect to the terminal block TB5 M NET transmission connecting wire 24 30V DC non polar Cem LED2 ix Power supply for Ramer GD owe in a i CN31 MA Remote controller BE Drain sensor DS CN3A MA Remote controller gi CN60 connecting wire 8 7 13V DC Pin LEV CN20 CN6V2 Damper motor TH21 CN44 CN6V1 Pipe temperature Vane motor TH222. Air out 8 WIRING DIAGRAM PFFY P20VKM E PFFY P20VKM ER1 PFFY P25VKM E PFFY P25VKM ER1 PFFY P32VKM E PFFY P32VKM ER1 PFFY P40VKM E PFFY P40VKM ER1 LEGEND SYMBOL NAME SYMBOL NAME SYMBOL NAME INDOOR CONTROLLER BOARD 1 FAN MOTOR UPPER TH23 PIPE TEMP DETECTIONIGAS CN32 CONNECTOR REMOTE SWITCH MF2 FAN MOTOR LOWER 0 C 15kQ 25 5 4kQ CN51 CENTRALLY CONTROL MV1 VANE MOTOR A B ADDRESS BOARD CN52 REMOTE INDICATION MV2 DAMPER MOTOR 5 1 SWITCH ODE SELECTION SW2 SWITCH __ CAPACITY CODE LS DAMPER LIMIT SWITCH CLOSE Swit ADDRESS SETTING 15 DIGIT SW3 MODE SELECTION LEV LINEAR EXPANSION VALVE SW12 ADDRESS SETTING 10ths DIGIT SW4 MODEL SELECTOR TB2 TERMINAL POWER SUPPLY SW14 BRANCH NO ZNR VARISTOR TB5 BLOCK TRANSMISSION SWC AIR OUTLET SELECTION FUSE FUSE T6 3AL250V TH21 THERMISTOR ROOM TEMP DETECTION LED1 POWER SUPPLY B 0C 15kQ 25 C 5 4kQ LED2 POWER SUPPLY TH22 PIPE TEMP DETECTIONLIQUID 0C 15kQ 25 C 5 4kQ NOTES 1 At servicing for outdoor unit always follow the wiring diagram of outdoor unit 2 In case of connecting MA Remote controller please connect MA remote controller cable in an accessory to the connecter 1 2 Remote controller wire is non polar 3 In case of using M NET please connec
3. THRESHOLD OF HEARING FOR CONTINUOUS NOISE i i H 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz PFFY P40VKM E PFFY P40VKM ER1 Test conditions OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR Cooling Dry b Heating Dry b 90 J 80 70 60 50 40 30 20 10 FAN SPEED FUNCTION SPL dB A LINE 2 COOLING 44 oe High HEATING 44 ulb temperature 27C Wet bulb temperature 19 C ulb temperature 20C Wet bulb temperature 15 C NC 30 APPROXIMATE i i THRESHOLD OF HEARING FOR i i NC 20 CONTINUOUS at NOISE i i i i 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz PFFY P25VKM E PFFY P25VKM ER1 PFFY P32VKM E PFFY P32VKM ER1 Test conditions OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR 10 FAN SPEED FUNCTION SPL dB A LINE COOLING 38 oe High HEATING 38 O O Cooling Dry bulb temperature 27C Wet bulb temperature 19 C Heating Dry bulb temperature 20C Wet bulb temperature 15 C 90 I 1 T T SRL 1 60 50 40 ERE HHHH 20 APPROXIMATE THRESHOLD OF F HEARING FOR P NC 20 CONT
4. ON OFF 12845678 910 Vane Available Not available Vane swing function Available Not available SW3 Vane horizontal angle Second setting 7 First setting Under Function i suspension x setting Vane cooling limit angle setting X5 Horizontal angle Down B C UR OUTLET x5 At cooling mode each angle Effective Not effective can be used only 1 hour x6 Please do not use SW3 9 10 Heat 4degrees up Not effective Effective X7 Second setting is the same as first setting Changing the opening of linear expansion valve during thermo OFF Superheat setting temperature X6 Sub cool setting temperature X6 In case replacing the indoor controller board make sure to set the switch to the Indoor controller board factory preset status which is shown below ON power OFF supply 12345 ON series 19 Effective Switch Operation by switch timing Remarks Address board Initial setting 4 d Option 1 Refer to 6 AIR OUTLET SELECTION Standard Option Standard Address board Address can be set while the SW12 SW11 How to set address unit is stopped Su Kosa for over 10 a and matc for 1 to 9 EO EMIT 10 1 with 3 40751 AS v Co Co setting 4 Rotary switch
5. Changes for the Better MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS November 2008 OC404 REVISED EDITION A TECHNICAL amp SERVICE MANUAL Series PFFY Floor Standing R410A R407C R22 Indoor unit Model names Service Ref Revision PFFY P20VKM E P F Y P 2 0 V K M PFFY P20 25 32 40 VKM ER1 added PFFY P20VKM ER1 PFFY P25VKM E F FY P 2 5V KM PFFY P25VKM ER1 Please void OC404 PFFY P32VKM E PFFY P32VKM E PFFY P32VKM EH1 ww PFFY P40VKM E PFFY PAOVKM EHR1 CONTENTS Z 1 TECHNICAL CHANGES 2 2 SAFETY PRECAUTION 2 Ex 3 PART NAMES AND FUNCTIONS 6 En c9 Indication of model name 4 SPECIFICATION 8 5 NOISE CRITERIA CURVES 10 zumo NOISE CHI I EHIA CURVESOS a 6 AIR OUTLET 11 LSS Ss Se 7 OUTLINES AND DIMENSIONS 12 a 8 WIRING DIAGRAM nnne 13 9 REFRIGERANT SYSTEM DIAGRAN 14 M 10 TROUBLE SHOOTING 15 11 DISASSEMBLY 23 INDOOR UNIT 12 RoHS PARTS LIST 28 NOTE This service manual describes technical data of the indoor units As for outdoor units refer
6. TH23 CN32 Connector Remote switch CN36 Damper limit switch Centrally control SW2 SW3 SW4 CN52 Capacity setting Function setting Model setting Remote indication 21 Linear expansion valve Room thermistor Liquid thermistor Liquid thermistor Gas 10 4 2 Address board PFFY P20VKM E PFFY P25VKM E PFFY P32VKM E PFFY P40VKM E SW1 Function setting 220 208v PFFY P20VKM ER1 PFFY P25VKM ER1 PFFY P32VKM ER1 PFFY P40VKM ER1 olo 240V 230 5 12 10ths digit address setting 1s digit address Air outlet selection setting 22 11 DISASSEMBLY PROCEDURE PFFY P20VKM E PFFY P32VKM E PFFY P25VKM E PFFY P40VKM E PFFY P20VKM ER1 PFFY P32VKM ER1 PFFY P25VKM ER1 PFFY P40VKM ER1 OPERATING PROCEDURE PHOTOS 1 Removing the panel Photo 1 1 Push both sides of the upper part of the front grille and pull the front grille open and then remove the front grille Push from the panel See Photo 1 2 Remove the screws of the panel See Photo 2 3 Open the horizontal vane and push the left right and middle of the upper part of the panel and pull the panel toward you See Photo 2 4 Lift up the panel and remove it from the box Grille Photo 2 Push 23 Push Horizontal vane Screws of the panel OPERATING PROCEDURE PHOTOS 2 Removing the indoor controller board and Photo 3 address board 1
7. 1 Normal condition in heating During defrosting op eration start of opera tion thermo off Be sure to keep the area around the damper of the lower air outlet free of any objects 1 Upper and lower air flow Upper air flow Y x2 2deg 4deg 2 DIP SW3 2 on indoor controller board OFF Initial Setting If the air conditioner has operated for 2hours with upper and lower air flow Room temp Set temp it changes to 8deg for next 30minutes After 30minutes it changes back to 4deg SW3 2 on indoor controller board ON Remains to be 4deg 11 7 OUTLINES AND DIMENSIONS PFFY P20VKM E PFFY P20VKM ER1 PFFY P25VKM E PFFY P25VKM ER1 PFFY P32VKM E PFFY P32VKM ER1 PFFY P40VKM E PFFY P40VKM ER1 INDOOR UNIT 46 5 607 46 5 508 12 4 6 Hole Installation plate 12 Air out Indoor unit Air in Gas pipe 12 7 flared 1 2 Liquid pipe 35 flare 363 Unit mm 131 333 210 337
8. Remarks T7W E00 530 NOZZLE ASSEMBLY UPPER T7W E07 002 HORIZONTAL VANE UPPER T7W E06 002 HORIZONTAL VANE LOWER T7W E01 103 VANE SLEEVE T7W E00 103 BEARING ASSEMBLY T7W E01 530 NOZZLE ASSEMBLY LOWER T7W E08 223 DAMPER MOTOR UP amp DOWN T7W E09 130 VANE MOTOR SUPPORT T7W E00 170 SM SHAFT T7W E00 272 DAMPER LIMIT SWITCH CLOSE md md ee NO O ee Se Oe lojon om o sN T7W E03 527 DRAIN HOSE ee b N Q 2 R01 E09 527 DRAIN HOSE T7W E08 002 VANE UNDER T7W E04 114 LINE FLOW FAN LOWER T7W E26 762 INDOOR FAN MOTOR LOWER ARW40Y8P30MS T7W E00 105 RUBBER MOUNT L R T7W E08 130 MOTOR BAND T7W E25 762 INDOOR FAN MOTOR UPPER ARW40Z8P30MS R01 E27 246 TERMINAL BLOCK a NIN 3P M1 M2 S R01 H18 202 ROOM TEMPERATURE THERMISTOR N N R01 H08 202 ROOM TEMPERATURE THERMISTOR T7W E37 716 TERMINAL BLOCK 3P L N 9 T7W E55 310 INDOOR CONTROLLER BOARD T7W E80 310 INDOOR CONTROLLER BOARD T7W E01 294 ADDRESS BOARD T7W E07 223 VANE MOTOR SET UP amp DOWN T7W E03 114 LINE FLOW FAN UPPER R01 E06 239 FUSE 6 3A o rI G G G G G G G
9. Remove the panel Refer to 1 2 Remove the screw of the electrical cover and then the electrical cover See Photo 3 3 Remove the screw of the ground wires connected to the indoor fan motor lower and then the ground wires See Photo 4 4 Remove the screw of the ground wires connected to the indoor heat exchanger and then the ground wires See Photo 4 5 Disconnect all the connectors on the address board and remove the screw of the address board case 6 Remove the screw of the ground wire connected to the indoor controller board and then the ground wire See Photo 4 Hair pin cover Water cover 1 7 Pull the indoor controller board case slightly toward you from the electrical box and disconnect all the connectors on the indoor controller board 8 Pull out the indoor controller board case from the electrical box Photo 4 Address board A B Screw of the ground wire 3 Removing the electrical box 1 Remove the panel Refer to 1 2 Remove the electrical cover Refer to 2 3 Remove the ground wires from the electrical box Refer to 2 4 Remove the ground wires connected to the indoor fan BAR motor and ones connected to the indoor heat exchanger See Photo 4 5 Remove the screw of the electrical box See Photo 4 6 Disconnect the following connectors on the indoor controller board Fan motor connectors lt CNMF1 2 gt Vane motor connect
10. 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 Liquid pipe sion valve is closed completely and if there thermistor are some leaking detecting temperature of the thermistor will go lower If the detected temperature is much lower 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 making any trouble If large amount of refrigerant is leaked exchange the linear expansion valve Linear expansion valve Wrong connection of the connector or contact failure Disconnect the con nector at the controller board then check the continuity Check the color of lead wire and missing terminal of the connector 17 10 2 FAN MOTOR Check method of indoor fan motor fan motor control P C board Notes High voltage is applied to the connecter 1 for the fan motor Pay attention to the service Do not pull out the connector CNMF 1 2 for the motor with the power supply on It causes trouble of the control P C board Self check Conditions The indoor fan cannot turn around Wiring contact check Contact of fan motor connector CNMF1 2 v Was contact caused good gt gt V Yes Power supply ch
11. to outdoor unit s service manual RoHS compliant products lt G gt mark on the spec name plate 1 TEHNICAL CHANGES PFFY P20VKM E PFFY P25VKM E PFFY P32VKM E PFFY P40VKM E PFFY P20VKM ER1 PFFY P25VKM ER1 PFFY P32VKM ER1 PFFY P40VKM ER1 INDOOR CONTROLLER BOARD I B has been changed Cautions for units utilizing refrigerant R407C 2 SAFETY PRECAUTION CAUTIONS RELATED TO NEW REFRIGERANT Do not use the existing refrigerant piping Use liquid refrigerant to seal the system The old refrigerant and lubricant in the existing piping contains a large amount of chlorine which may cause the lubricant deterioration of the new unit If gas refrigerant is used to seal the system the composition of the refrigerant in the cylinder will change and performance may drop Use low residual oil piping If there is a large amount of residual oil hydraulic oil etc inside the piping and joints deterioration of the lubricant will result Do not use a refrigerant other than R407C If another refrigerant R22 etc is used the chlorine in the refrigerant may cause the lubricant deterioration Store the piping to be used indoors during installation and both ends sealed until just before brazing Store elbows and other joints in a plastic bag Use a vacuum pump with a reverse flow check valve The vacuum pump oil may flow bac
12. DG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Nov 2008 No OC404 REVISED EDITION A PDF 7 New publication effective Nov 2008 Distributed in Jul 2006 No OC404 PDF 8 Specifications subject to change without notice Made in Japan
13. G G G G G G G G G G G G G G G G G G G G G G T7W E04 304 ADDRESS CABLE 29 12 2 STRUCTURAL PARTS PFFY P20VKM E PFFY P20VKM ER1 PFFY P25VKM E PFFY P25VKM ER1 PFFY P32VKM E PFFY P32VKM ER1 PFFY P40VKM E PFFY P40VKM ER1 1 12 2 STRUCTURAL PARTS Q ty unit Symbol Part No Part name in Wiring 20 25 32 40 Remarks Diagram pFFY P20 25 32 40VKM ER1 T7W E01 635 BOX T7W_E06 651 PANEL ASSEMBLY T7W_E05 691 FRONT PANEL T7W E01 500 CATECHIN AIR FILTER T7W E01 808 BACK PLATE RoHS 30 12 3 INDOOR UNIT HEAT EXCHANGER PFFY P20VKM ER1 PFFY P25VKM ER1 PFFY P32VKM ER1 PFFY P40VKM ER1 PFFY P20VKM E PFFY P25VKM E PFFY P32VKM E PFFY P40VKM E 12 3 INDOOR UNIT HEAT EXCHANGER Part No Part name Symbol in Wiring Diagram Q ty unit PFFY P20 25 32 40 VKM E VKM ER1 Remarks T7W E00 031 HAIR PIN COVER T7W H56 480 INDOOR HEAT EXCHANGER T7W_E01 031 WATER COVER 1 1 1 1 T7W E16 202 PIPE TEMPERATURE THERMISTOR TH22 TH23 T7W E19 401 RoHS EXPANSION VALVE LEV R01 H23 401 EXPANSION VALVE 31 LEV 1 CHY MUCH 2 MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BL
14. INUOUS T NOISE lI i i 10 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz INDOOR UNIT MICROPHONE WALL AIR OUTLET SELECTION N ON OFF 1234 SW12 9 0 81 ini No 5 F No deam RANCH No J Fig 4 1 SWC 7 SWC qu With this function air comes out simultaneously from the upper and lower air outlets so that the room can be cooled or heated effectively This function is set using the switch SWC on the address board How to set to blow out air from the upper and lower air outlets gt Set the SWC to lower side Initial setting Air blows out automatically from the upper and lower air outlet as shown in the table below How to set to blow out air from the upper air outlet only gt Set the SWC to upper side 2 Be sure to operate with the main power turned off Description of operation Operation COOL HEAT FAN Air flow Upper and lower air flow Upper air flow Upper air flow only P Upper and lower air flow Upper air flow lt Upper and lower air flow Conditions Room temperature and set temperature are dif ferent 1 Room temperature is close to set temperature or thermo off
15. R1 PFFY P25VKM ER1 PFFY P32VKM ER1 PFFY P40VKM ER1 Thermistor Maa 21 Resistance 0 C 15kQ 10 9 6 20 C 6 3kQ 25 C 5 4kQ 30 C 4 3kQ 40 C 3 0kQ etection Thermistor Pipe temperature TH22 Resistance 0 C 15kQ 10 C 9 6kQ 20 C 6 3kQ 25 C 5 4kQ 30 C 4 3kQ 40 C 3 0kQ detection Liquid Thermistor Pipe temperature TH23 Resistance 0 C 15kQ 10 C 9 6kQ 20 C 6 3kQ 25 C 5 4kQ 30 C 4 3kO 40 C 3 0kQ detection Gas Fuse Indoor controller board FUSE 250V 6 3A OUTPUT 30W Fan motor Upper MF1 ARW40Z8P30MS OUTPUT 30W Fan motor Lower MF2 ARW40Y8P30MS Vane motor MV1 eed MP35EA Damper motor MV2 Bon Linear expansion valve LEV DC12V Stepping motor drive Port dimension 5 2 0 2000 pulse coil EFM 40YGME Power supply terminal Weck PRR TB2 L N 330V 30A T issi inal MN Ns 5 1 2 5 250 20 5 NOISE CRITERIA CURVES PFFY P20VKM E PFFY P20VKM ER1 Test conditions Cooling Dry bulb temperature 27 C Wet bulb temperature 19 C OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR 80 70 60 50 40 30 20 SPEED FUNCTION SPL dB A LINE COOLING 37 ee High HEATING 37 Heating Dry bulb temperature 20C Wet bulb temperature 15 APPROXIMATE
16. VKM E PFFY P32VKM E PFFY P40VKM E PFFY P20VKM ER1 PFFY P25VKM ER1 PFFY P32VKM ER1 PFFY P40VKM ER1 Power source 1 phase 220 240V 50Hz Cooling capacity 2 2 2 8 3 6 4 5 Heating capacity 2 5 3 2 4 0 5 0 Power Cooling 0 025 0 025 0 025 0 028 consumption Heating 0 025 0 025 0 025 0 028 Cooling 0 20 0 20 0 20 0 24 Heating 0 20 0 20 0 20 0 24 Height 600 600 600 600 Dimension Width 700 700 700 700 Depth 200 200 200 200 Weight 15 15 15 15 Item Current Heat exchanger Cross fin Aluminum plate fin and copper tube Type Line flow fan x 2 Airflow rate 2 5 9 6 8 7 6 8 7 6 1 7 0 8 0 9 1 6 1 7 0 8 0 9 1 8 0 9 0 9 5 10 7 External static pressure Type DC motor Output 0 03 x 2 Motor Air filter PP honeycomb fabric Catechin air filter Refrigerant Gas Flare 12 7 pipe dimension Liquid Flare 6 35 Field drain pipe size I D 16 PVC pipe VP 16 connectable Noise level 2 27 31 34 37 28 32 35 38 28 32 35 38 35 38 42 44 Note 1 Rating conditions JIS B 8616 Cooling Indoor D B 27 W B 19 0 C outdoor D B 35 C Heating Indoor 20 C outdoor D B 7 C 6 C 2 Air flow and the noise level are indicated as High Medium1 Medium2 Low 4 2 Electrical parts specifications Model Symbol PFFY P20VKM E PFFY P25VKM E PFFY P32VKM E PFFY P40VKM E Parts name PFFY P20VKM E
17. cates the action of the swing louver Does not appear if the louver is stationary Power On indicator Indicates that the power is on The indicator goes off after one hour at which time the airflow di rection also changes Caution e Only the Power on indicator lights when the unit is stopped and power supplied to the unit e f you press a button for a feature that is not installed at the indoor unit the remote controller will display the Not Available message If you are using the remote controller to drive multiple indoor units this message will appear only if he feature is not present at every unit connected e When power is turned ON for the first time it is normal that PLEASE WAIT is displayed on the room temperature indication For max 2minutes Please wait until this PLEASE WAIT indication disappear then start the operation e For the PFFY P VKM series the airflow direction displayed on the remote controller is different from the actual airflow direc tion Refer to the following table 1 2 3 4 Horiz Swing Display E gt B gt B 1 2 3 4 Horiz Swing Actual gt gt Im e The airflow direction for the lower air outlet damper cannot be set The airflow direction is automatically controlled by a com puter 4 SPECIFICATION 4 1 Specification PFFY P20VKM E PFFY P25
18. d in proportion to the number of pulse signal lt Connection between the indoor controller board and the linear expansion valve gt Controller board 1 White DC12V Linear expansion valve Brown 6 4 Blue Red B Drive circuit Q0 6 in 4 Blue 4 M S lt 3 Orange 3 i S lt i 5 2 3 al 2 Yellow 2 192 Red lt 8 21 white 1 1 e 16 Connector CN60 lt Output pulse signal and the valve operation gt Output Output Phase 1 2 3 4 Closing a 1 2 3 4 1 Opening a valve 4 352514 21 ON OFF OFF ON The output pulse shifts in above order 2 ON ON OFF OFF When linear expansion valve operation stops all output phase become OFF 3 OFF ON ON OFF At phase interruption or when phase does not shift in order tor d not rotate smoothly and motor locks and vibrates 4 OFF OFF ON ON 4 Linear expansion valve operation When the switch is turned on 2200 pulse closing valve signal will be send till it goes to 9 point in order to define the valve ON position When the valve move smoothly there is no noise or vibration occurring from the linear expansion valve however when the S pulse number moves from to or when the valve is locked more noise can be heard than normal situation 2 Noise can be detected by placing th
19. e ear against the screw driv amp er handle while putting the screw driver to the linear expansion Outdoor unit valve gt R410A model 1400 pulse R22 model 2000 pulse Opening a valve the way 2 Pulse number Extra tightning 807 100pulse 9 Trouble shooting Symptom Check points Countermeasures Operation circuit failure of the micro processor Exchange the indoor controller board at drive circuit failure Disconnect the connector on the controller board then connect LED for checking 1 LED Pulse signal will be sent out for 10 seconds as soon as the main switch is turned on If there is LED with lights on or lights off it means the operation circuit is abnormal Linear expansion valve mechanism is locked Motor will idle and make ticking noise when motor is operated while the linear expansion valve is locked This ticking sound is the sign of the abnormality Exchange the linear expansion vale Short or breakage of the motor coil of the linear expan sion valve Valve does not close completely Measure the resistance between the each coil red white red orange brown yellow brown blue using a tester It is normal if the resistance is in the range of 1500 10 Exchange the linear expansion valve 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
20. eck Check the voltage in the indoor control P C board TEST POINT FAN MOTOR upper CNMF1 2 DC310 340V CNMF2 DC15V CNMF2 0 DCO 6 5V FAN MOTOR lower CNMF1 2 DC310 340V CNMF2 DC15V CNMF2 DCO 6 5V The voltage between CNMF2 0 and are values during the fan motor operation In the case that the fan motor off the voltage is OV v Is the voltage normal gt No Indoor controller board fuse check 7 v es No Is the fuse normal gt Replace Y Yes Replace the indoor NG Y o ep the indoor lt Check the operation gt END controller board OK Check the operation gt END Fan motor position sensor signal check V NG Turn around the fan motor more than one revolution slowly and check the voltage between the connecter FAN MOTOR upper 2 Q FAN MOTOR lower CNMF2 Replace the fan motor D v No Does the voltage repeat DC 0V and DC 15V Replace the fan motor do Yes Yes OK Check the operation of fan gt END Replace the indoor controller board Y NG Replace the indoor controller board Y OK Check the operation gt END V NG Replace the fan motor 18 10 3 FUNCTION OF DIP SWITCH Operatio
21. er See Photo 8 3 Remove the drain hose from the nozzle assembly lower and pull out the nozzle assembly lower toward you 4 Remove the tape fixing the lead wires of the damper motor from the nozzle assembly lt lower gt See Photo 9 5 Remove the screws of the damper motor support and then the damper motor support 6 Remove the screws of the damper motor and then the Screw of Screw of damper motor from the damper motor support the nozzle the nozzle 7 Disconnect the connector from the damper motor 8 Remove the damper limit switch LS Photo 8 Drain hose Photo 9 7 Removing the indoor fan motor 1 Remove the panel Refer to 1 2 Remove the nozzle assembly lower and the drain hose Refer to 6 3 Remove the screw of the ground wire of the indoor fan motor lower and then the ground wire See Photo 11 4 Remove the screw of the motor band and then the motor Lead wires of the damper motor band See Photo11 5 Remove the line flow fan and the indoor fan motor lower from the box Photo 10 Screw of the damper motor support Screw of the damper motor Photo 11 T LER J w Screw of Screw of the the motor band ground wire 26 OPERATING PROCEDURE PHOTOS 8 Removing the pipe temperature detection liquid and gas thermistors and room temperature thermistor 1 Remove the panel Refer to 1 2 Remove the
22. k into the refrigerant cycle and cause the lubricant deterioration If dust dirt or water enters the refrigerant cycle deterioration of the oil and compressor trouble may result Ventilate the room if refrigerant leaks during operation If refrigerant comes into contact with a flame poisonous gases will be released Use ESTR ETHER or HAB as the lubricant to coat flares and flange connection parts If large amount of mineral oil enter that can cause deterioration of refrigerant oil etc 1 Cautions for service After recovering the all refrigerant in the unit proceed to working Do not release refrigerant in the air After completing the repair service recharge the cycle with the specified amount of liquid refrigerant 2 Refrigerant recharging 1 Refrigerant recharging process Direct charging from the cylinder R407C cylinder are available on the market has syphon pipe Leave the syphon pipe cylinder standing and recharge it By liquid refrigerant Gravimeter 2 Recharge in refrigerant leakage case After recovering the all refrigerant in the unit proceed to working Do not release the refrigerant in the air After completing the repair service recharge the cycle with the specified amount of liquid refrigerant 3 Service tools Use the below service tools as exclusive tools for R407C refrigerant Tool name Specifications Gauge manifo
23. ld Only for R407C Use the existing fitting SPECIFICATIONS UNF7 16 Use high tension side pressure of 3 43MPa G or over Charge hose Only for R407C Use pressure performance of 5 10MPa G or over Electronic scale Gas leak detector Use the detector for R134a or R407C Adapter for reverse flow check Attach on vacuum pump Refrigerant charge base Refrigerant cylinder For R407C Top of cylinder Brown Cylinder with syphon Refrigerant recovery equipment Cautions for units utilizing refrigerant R410A Do not use the existing refrigerant piping The old refrigerant and lubricant in the existing piping contains a large amount of chlorine which may cause the lubricant deterioration of the new unit Use a vacuum pump with a reverse flow check valve Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc Use low residual oil piping Use the following tools specifically designed for use with R410A refrigerant If there is a large amount of residual oil hydraulic oil etc inside the piping and joints deterioration of the lubricant will result Store the piping to be used indoors during installation and both ends of the piping sealed until just before brazing Leave elbow joints etc in their packaging The following tools are necessary to use R410A ref
24. n by switch Effective e Remarks ON OFF timing Switch Function Thermistor lt Room temperature detection gt position _ Built in remote controller Indoor unit Address board Filter clogging detection Provided Not provided ae Initial setting Filter cleaning 2 500hr 100hr ON OFF Fresh air intake Effective Not effective 12345678910 Switching remote Indicating if the Indicating fan operation controller display thermostat is ON ON OFF SW1 Function setting Under Note suspension 1 Fan operation at Heating mode X2 Thermo ON operation at heating mode Heat thermostat OFF Setting air flow 3 Depends on SW1 7 X3 SW 1 7 OFF SW 1 8 ON I Setting air flow Auto restart function Effective Not effective SW 1 7 ON SW 1 8 ON Indoor fan stop Humidifier control Always operated while the heat in ON 1 Operated depends on the condition 22 Air flow set in case of Low 3 Extra low NID a O N A Power ON OFF by breaker Effective Not effective Indoor controller board Capacity Set while the unit is off SW2 Initial settin Capacity P32 Set for each capacity setting Heat pump Cooling only Cooling only Heat pump Indoor controller board Set while the unit is off Limitation at time of damper open operation 4 sd Initial setting
25. near expansion valve acr Strainer1 50mesh Strainer2 50mesh Strainer 100mesh Thermistor Room temperature detection TH21 Unit mm lig ee PFFY P20 P25 P32 P40VKM E R1 Gas pipe 12 7 1 2 Liquid pipe 6 35 1 4 14 10 TROUBLE SHOOTING 10 1 HOW TO CHECK PFFY P20VKM E PFFY P20VKM ER1 Parts name PFFY P32VKM E PFFY P32VKM ER1 PFFY P25VKM E PFFY P25VKM ER1 PFFY P40VKM E PFFY P40VKM ER1 Check points Room temperature thermistor TH21 Liquid pipe temperature thermistor TH22 Gas pipe temperature thermistor TH23 Disconnect the connector then measure the resistance using a tester Surrounding temperature 10 C 30 C Normal Abnormal 4 3kQ 9 6kQ Refer to the next page for a detail Open or short Fan motor MF1 2 Check 10 2 Linear expansion valve LEV Q0 1 Brown Yellow Blue White Red Orange Disconnect the connector then measure the resistance valve using a tester Surrounding temperature 20 C Normal Abnormal Refer to the next page for a detail 1 5 White Red 2 6 3 5 Yellow Brown Orange Red 2000 10 4 6 Blue Brown Open or short Vane motor MV1 Red Yellow Brown Orange Green Measure the resistance between the terminals using a tester Surrounding temperature 20 C 30 C Connector Abnormal Brown Red B
26. oller but If the simple or Auto Off timer is set shows the time tons have been locked remaining Identifies the current operation Shows the operating mode etc Multilanguage display is sup ported Clean The Filter indicator Comes on when it is time to clean the filter EA MITSUBISHI ELECTRIC TIME SUN MON TUE WED THU FRI SAT dE d Edid H ON E AFTER i AFTER oFF Timer indicators Centrally Controlled indicator ERROR FONGHON The indicator comes on if the corre 5 5802 atl FILTER sponding timer is set Indicates that operation of the re mote controller has been prohib ited by a master controller WEEKLY a AUTOOFF Timer Is indicator Indicates that the timer is off Temperature Setting Shows the target temperature Fan Speed indicator Shows the selected fan speed Up Down Air Direction indica tor Room Temperature display The indicator N shows the direc tion of the outcoming airflow Shows the room temperature Ventilation indicator Louver display Appears when the unit is running in Ventilation mode One Hour Only indicator Displayed if the airflow is set to Low and downward during COOL or DRY mode Operation varies according to model Indi
27. or lt CN6V1 gt Damper motor connector lt CN6V2 gt Pipe temperature thermistor connector lt CN44 gt Damper limit switch connector CN36 7 Unhook the electrical box from the upper catch and pull out the electrical box from the box n Indoor controller board Screw of the i ground wire Terminal block Screw of the Fan motor TB2 ground wire Heat exchanger Terminal block TB5 24 OPERATING PROCEDURE PHOTOS 4 Removing the vane motor MV1 Photo 5 1 Remove the panel Refer to 1 2 Remove the screws of the vane motor and pull out the vane motor See Photo 5 3 Disconnect the connector from the vane motor Screw of vane motor 5 Removing the indoor fan motor upper Photo 6 1 Remove the panel Refer to 1 Remove the electrical box Refer to 3 2 3 Remove the nozzle upper See Photo 6 4 Unhook the water cover from the catches and remove the water cover See Photo 6 5 Removing the screw of the motor band and then the motor band See Photo 7 6 Remove the line flow fan and the indoor fan motor upper from the box Nozzle lt Upper gt Photo 7 Screw of motor band a os 25 OPERATING PROCEDURE PHOTOS 6 Removing the damper motor and the damper limit switch 1 Remove the panel Refer to 1 2 Remove the screws of the nozzle assembly low
28. r service 1 Perform service after collecting the refrigerant left in unit completely 2 Do not release refrigerant in the air 3 After completing service charge the cycle with specified amount of refrigerant 4 When performing service install a filter drier simultaneously Be sure to use a filter drier for new refrigerant 2 Additional refrigerant charge When charging directly from cylinder Check that cylinder for R410A on the market is syphon type Charging should be performed with the cylinder of syphon stood vertically Refrigerant is charged from liquid phase 3 Service tools Use the below service tools as exclusive tools for R410A refrigerant Tool name Specifications Gauge manifold Only for R410A Use the existing fitting specifications UNF 1 2 Use high tension side pressure of 5 3MPa G or over Charge hose Only for R410A Use pressure performance of 5 09 or over Electronic scale Gas leak detector Use the detector for R134a R407C or R410A Adaptor for reverse flow check Attach on vacuum pump Refrigerant charge base PL Refrigerant cylinder Only for R410A of cylinder Pink Cylinder with syphon Refrigerant recovery equipment PART NAMES AND FUNCTIONS Indoor Unit e Wired remote controller Louver Air outlet gt Air inle
29. rigerant Tools for R410A Flare tool Size adjustment gauge Vacuum pump adaptor Electronic refrigerant charging scale Gauge manifold Charge hose Gas leak detector Torque wrench If dirt dust or moisture enter into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor Handle tools with care Use ester oil ether oil or alkylbenzene oil small amount as the refrigerant oil applied to flares and flange connections If dirt dust or moisture enter into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor If large amount of mineral oil enter that can cause deterio ration of refrigerant oil etc Do not use a charging cylinder If a charging cylinder is used the composition of refrigera nt will change and the efficiency will be lowered Charge refrigerant from liquid phase of gas cylinder If the refrigerant is charged from gas phase composition change may occur in refrigerant and the efficiency will be lowered Ventilate the room if refrigerant leaks during operation If refrigerant comes into contact with a flame poisonous gases will be released Do not use refrigerant other than R410A If other refrigerant R22 etc is used chlorine in refrige rant can cause deterioration of refrigerant oil etc 1 Cautions fo
30. rown Orange 282 3060 Open or short Brown Yellow Brown Blue Damper motor MV2 Orange Red M Yellow Brown Blue Measure the resistance between the terminals using a tester Surrounding temperature 20 C 30 C Connector Normal Abnormal Brown Yellow Brown Blue 186 2140 Open or short Red Orange Red Pink 15 lt Thermistor Characteristic graph gt Thermistor for lower temperature Thermistor Ro 15kQ 3 Fixed number of B 3480 2 Rt 15exp 348001 _ _1_ 273 t 273 15kQ 10 9 6kQ 20 C 6 3kQ 25 C 5 2kQ 30 C 4 3kQ 40 C 3 0kQ Room temperature thermistor TH21 Liquid pipe temperature thermistor TH22 Gas pipe temperature thermistor TH23 Resistance KQ 50 40 30 20 lt Thermistor for lower temperature gt 20 10 0 10 20 30 40 50 Temperature C Linear 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 change
31. screw of the electrical cover and then the electrical cover See photo 3 3 Remove the pipe temperature detection liquid and gas thermistors from the holders 4 Disconnect the connector CN44 on the indoor controller board 5 Loosen the room temperature thermistor wire clamp under the electrical box 6 Disconnect the connector CN20 on the indoor controller board 9 Removing the heat exchanger and linear expansion valve 1 Remove the panel Refer to 1 2 Remove the hair pin cover and water cover See Photo 3 3 Remove the 2 screws of the heat exchanger See Photo 14 4 Unhook the heat exchanger from 2 catches electrical box side 5 Pull out the heat exchanger and linear expansion valve Photo 12 Thermistor Gas TH23 Thermistor Room temperature Liquid TH22 thermistor TH21 Photo 13 Heat exchanger Photo 14 a S Wu Screws of the heat exchanger Hair pin cover 27 12 RoHS PARTS LIST 12 1 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS PFFY P20VKM E PFFY P20VKM ER1 PFFY P25VKM E PFFY P25VKM ER1 PFFY P32VKM E PFFY P32VKM ER1 PFFY P40VKM E PFFY P40VKM ER1 28 12 1 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration 2 Part No Part name Symbol in Wiring Diagram Q ty unit PFFY P20 25 32 40 VKM E VKM ER1
32. t Vane Filter Damper Air outlet Louver Once the controls are set the same operation mode can be repeated by simply pressing the ON OFF button Operation buttons Set Temperature buttons Cv Down CA Up Timer Menu button Monitor Set button Mode button Return button Set Time buttons Timer On Off button Set Day button e MITSUBISHI ELECTRIC Q ON OFF Opening the door a BACK 5 PAR 21MAA ON OFF button Fan Speed button Filter 1 button lt Enter gt button Test Run button Check button Clear button Airflow Up Down button Louver button 57 Operation button To preceding operation number Ventilation button A Operation button CA To next operation number e Display Sensor indication Displayed when the remote controller sensor is used Day of Week Shows the current day of the week For purposes of this explanation all parts of the display are shown as lit During actual operation only the relevant items will be lit Time Timer Display Shows the current time unless the simple or Auto Off Locked indicator timer is set Indicates that remote contr
33. t ET P32 ou mun 123456 ON H21 TH23 TH22 LS P40 or el LEV 123456 AIA 1 m m A a 3 2 1116 5 4131211 4 3 211 3 211 LED1 CN31 CN60 CN44 CN36 WHT WHT WHT BLK 21 CN52 CN20 CN51 GRN WHT WH wr SWE EHH RED 2 8 WHT u o5 att o BLU DC311 zl RED FUSE 339V A B E Ir m A 95 817161514180 e F WHT wary og QS 525 413 211 x BK ei WHT amp 2 z amp 2o CN42 911 RED cz LED2 RED 14131211 ES EX 55 Am TB2RED l x e 5l x Qatu CN2M CN3A CN6V2 SEHE 75 5H CUZ 0 GND CNME2 BLU BLU BLU GRN _ VHX se osanruw EK WHT TITRES Se 2 5275 i 777 S a 4 uU BLU xaxd Z s s BLU AT 3 lt z 9 2 3 x z z o z oS TO OUTDOOR UNI TB5 ORN alls SeS als Ses BC CONTROLLER M1 o TO MA REMOTE 1 112191415161 11213141516 REMOTE CONTROLLER 2 CONTROLLER _ 608 DC2430V 0 Q D687 13V UJ I J S SHIELD See fig 1 MV2 MV1 9 REFRIGERANT SYSTEM DIAGRAM PFFY P20VKM E PFFY P20VKM ER1 PFFY P25VKM E PFFY P25VKM ER1 PFFY P32VKM E PFFY P32VKM ER1 PFFY P40VKM E PFFY P40VKM ER1 Thermistor Pipe temperature detection Gas TH23 Strainer 50mesh Gas pipe N Thermistor Pipe temperature detection Liquid TH22 Flare connection Heat exchanger Liquid pipe Li
34. t to TB5 Transmission line is non polar 4 Symbol S of TB5 is the shield wire connection 5 Symbols used in wiring diagram above terminal block connector 6 The setting of the SW2 dip switches differs in the capacity For the detail refer to fig 1 fig X1 LED on indoor board for service MODELS a MARK MEANING FUNCTION a LED1 Main power suppi Main power supply Indoor unit 220 240V P20 orr I m power on gt lamp is lit LED2 Power supply for Power supply for MA remote controller 25 of ial EXT MA Remote controller on lamp is li
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