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service manual pca-a24ka4 pca-a30ka4 pca-a36ka4 pca

1. PCA A24KA4 NOTCH SPL dB _LINE PCA A30KA4 NOTCH SPL dB LINE High 40 0 High 41 ooo Medium1 37 Medium1 39 Medium2 35 gt Medium2 37 o e Low 33 2 4 Low 35 2 4 90 I I E 1 1 90 4 4 4 _ op e 5 F 5 1 q 8 70 T i i 8 F 1 5 i 5 i i i ES NC 70 5 1 NC g F m T F F i i 2 F esee d i e ICA NND E eee 5 60 i TUNE 2 Chess 60 3 1 5 i i NC 60 d i ia 5 ctas c 5 X i E of i 3NC 60 T I 4 f F 50 50 EI 3 E i 4NC 50 2 i e ui N T d i I FAN 2 40 5 2 40 T 9 E 8 a 4 5 2 30 a 30 gt o i i 8 20 THRESHOLD oF 20 __ Aeenoxiare HEARING FOR d HEARING FOR F CONTINUOUS CONTINUOUS NOISE NOISE 2 10 x n 10 T T 2 1 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz NOTCH SPL dB LINE 2 SPL d
2. BINS lt io uos 59 5 fouefuaug 8 uonoeuuoo pejejyepis edid seb Sped jeuondo Josues 995 pue 4 oar edid jue1eDujeu 7 19 01002 1 55 JO 5 2 Duidid urejp 10 ejou 1nox0Uy 5 Yo 10j uoroeuuoo edid 7 P RR Es m 92 edid D sued jeuondo BEE IEL 51 105098 995 pue 54 199906 Jejouoo 1 je dione 88510 8 90 seb Ssgamwjoeseou Tenn Segue 256 8 6 08091722 S 9g 195005 UUM L 6vL v 98 189145919 0091759 29 1 8 8 89 5 Isnp jo 9512294 aq 1 eu ul yoq eoerd juepuedepur ay 1nd uau 80819 juepuedepu y 51014000 pepeus eu v2 0 auns ayew edid 1691 3y jo 9520 uj 40 OO 5 F 8 5 1978 1 81 umop pend si s 3 fi S ES z x 70080 5 i 4 lt S 86 091 7 8 lt az e a e a 04 uoisuedsng 551 91 5 19 9 20428 PCA A36KA4 puemdn edid juejefujei sued uondo Burjjejsur 915 esee q
3. OUTDOOR UNIT S SERVICE MANUAL PUZ A18 24 30 36 42NHA4 PUZ A18 24 30 36 42NHA4 PUZ A18 24 30 36 42NHA4 BS PUZ A18 24 30 36 42NHA4 BS OCH481 PUY A1 8 24 30 36 42NHA4 PUY A18 24 30 36 42NHA4 OCB481 PUY A18 24 30 36 42NHA4 BS PUY A18 24 30 36 42NHA4 BS Remote controller Optional parts Radio frequency interface Wired remote controller IR wireless remote controller ONOFF jTEMP 990 RF thermostat 9 0 i OOOO 2 SAFETY PRECAUTION 2 1 ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal all supply circuits must be disconnected 2 2 CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A Use new refrigerant pipes Do not use refrigerant other than R410A Make sure that the inside and outside of refrige rant piping is clean and it has no contaminants such as sulfur oxides dirt shaving particles etc which are hazards to refrigerant cycle In addition use pipes with specified thickness If other refrigerant R22 etc is used chlorine in refrige rant can cause deterioration of refrigerant oil etc Use a vacuum pump with a reverse flow check valve Contamination inside refrigerant piping can cause deterio ration of refrigerant oil etc Vacuum pump oil may flow back into refrigerant cycle and that can cause deterio
4. Malfunction of drain pump Defective drain Clogged drain pump Clogged drain pipe Defective drain float switch Catch of drain float switch or malfunction of moving parts cause drain float switch to be detected under water Switch On Defective indoor controller board Check if drain pump operates Check drain function 9 Remove drain float switch connector CN4F and check if it is short Switch On with the moving part of float switch UP or OPEN with the moving part of float switch down Replace float switch if it is short with the moving part of float switch down Replace indoor controller board if it is short circuited between of the drain float switch connector CN4F and abnormality reappears It is not abnormal if there is no problem about the above mentioned Turn the power off and on again to operate after check Error Code Abnormal point and detection method Cause Countermeasure Freezing overheating protection is opearting Freezing protection Cooling mode The unit is in 6 minute resume prevention mode if pipe liquid or condenser evapo rator temperature stays under 15 C 5 F for minutes minutes after the compressor started Abnormal if it stays under 15 C 5 F for minutes again within 16 minutes after 6 minute resume prevention mode Overheating protection Heating mode The units is in 6 minute resume prevention mode if pipe
5. Abnormal if sub remote controller could not receive for any signal for 2 minutes Error code EO Abnormal if indoor controller board cannot receive any data normally from remote controller board or from other indoor controller board for 3 minutes Error code E4 Indoor controller board cannot receive any signal from remote controller for 2 minutes Error code E4 Q Contact failure at transmission wire of remote controller remote controllers are set as sub remote controller In this case EO is displayed on remote controller and E4 is displayed at LED LED1 LED2 on the outdoor controller circuit board Miswiring of remote controller Defective transmitting receiving circuit of remote controller Defective transmitting receiving circuit of indoor controller board of refrigerant addresses 0 Noise has entered into the transmission wire of remote controller 20 Check disconnection or looseness of indoor unit or transmission wire of remote controller Set one of the remote controllers main if there is no problem with the action above Check wiring of remote controller Total wiring length max 500m 1640ft Do not use cable x 3 or more number of connecting indoor units max 16 units number of connecting remote control ler max 2 units When the above mentioned problem of O are not applied Q Diagnose remote controllers a
6. Indicates whether control power is supplied Make sure that this LED is LED2 power for wired remote controller Indicates whether power is supplied to the wired remote controller This LED lights only in the case of the indoor unit which is connected to the outdoor unit refrigerant addresses 0 LED3 communication between indoor and outdoor units Indicates state of communication between the indoor and outdoor units Make sure that this LED is always blinking 17 9 3 SELF DIAGNOSIS ACTION TABLE Error Code Abnormal point and detection method Note Refer to the manual of outdoor unit for the details of display Cause such as F U and other E Countermeasure Room temperature thermistor TH1 The unit is 3 minute resume prevention mode if short open of thermistor is detected Abnormal if the unit does not reset normally after 3 min utes The unit returns to normal opera tion if it has been reset normally Constantly detected during cooling drying and heating operation Short 90 C 194 F or more Open 40 40 F or less Defective thermistor characteristics Contact failure of connector CN20 on the indoor controller board Insert failure Breaking of wire or contact failure of thermistor wiring Defective indoor controller board Check resistance value of thermistor oC 32 F 10 C 50 F 40 C 104 F If you pu
7. 0 97 Airflow Low Medium2 Mediumt High Dry 22 24 26 28 775 850 920 990 Wet 20 22 24 26 705 775 850 920 External static pressure O direct blow Operation control amp Thermostat Remote controller amp built in Noise level Low Medium2 Medium1 High 37 39 41 43 Field drain pipe O D 26 1 1 32 Dimensions 1 600 63 680 26 3 4 230 9 1 16 Weight z 5 oc Q Service Ref 42 4 Power supply phase cycle voltage 1 phase 60Hz 208 230V Max Fuse Size 15 Min Circuit Ampacity 2 External finish White Munsell 6 4Y 8 9 0 4 Heat exchanger Plate fin coil Fan Fan drive x No Sirocco fan direct x 4 Fan motor output kW 0 160 Fan motor F L A 0 97 Airflow Low Medium2 Medium1 High m min CFM Dry 23 25 27 29 810 885 955 1025 Wet 21 23 25 27 740 810 885 955 External static pressure O direct blow Operation control amp Thermostat Remote controller amp built in Noise level Low Medium2 Medium1 High 39 41 43 45 Field drain pipe O D 26 1 1 32 Dimensions 1 600 63 680 26 3 4 230 9 1 16 Weight 5 NOISE CRITERION CURVES
8. 1 Cautions for service Ventilate the room if refrigerant leaks during operation If refrigerant comes into contact with a flame poisonous gases will be released 1 Perform service after recovering 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 R407C refrigerant Tool name Specifications Gauge manifold Only 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 09MPa G 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 Refrigerant cylinder Only R410A of cylinder Pink Cylinder with syphon Refrigerant recovery equipment
9. Stopping operation stop operation press the 2 button or the button 9 5 2 When wired remote controller or indoor unit microprocessor fails 1 When the wired remote control or the indoor unit microprocessor has failed but all other components work properly if you set the switch SWE on the indoor controller board ON the indoor unit will begin emergency operation When emergency operation is activated the indoor unit operates as follows 1 Indoor fan is running at high speed 2 Drain pump is working option Note on the IR wireless remote control when the remote control does not function it is possible to activate emergency operation by using the indoor unit emergency operation switch SW1 SW2 of the IR wireless signal receiver board However if the indoor unit microprocessor has failed it is necessary to proceed with points 2 and 3 below as in the case of the wired remote controller 2 When you activate emergency operation of the cooling or heating you have to set the switch SWE on the indoor controller board and activate emergency operation of the outdoor unit For details on how to activate emergency operation of the outdoor unit refer to the outdoor unit wiring diagram 3 Before you activate emergency operation check the following points 1 Emergency operation cannot be activated when the outdoor unit malfunctions the indoor fan malfunctions when it has detected the malfunction of drain p
10. 3 PART NAMES AND FUNCTIONS e Indoor Unit Louver Air outlet Filter Air intake Inside of Air intake e Wired remote controller Option 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 MITSUBISHI ELECTRIC TIME SUN MON TU Centrally Controlled indicator Indicates that operation from the remote controller has been prohib ited by a master controller AFTER gt P 0 AFTER OFF OR CODE FONeHON ICI FC ABA s FILTER IQ ee WEEKLY E SIMPLE A 39 AUD Ore Lii dw E WED THU FRI SAT Clean The Filter indicator To be displays on when it is time to
11. 8 als 88 Y 29 9 2 091 2 1 9 youd uoisuedsns 621791 11 8 snp jo 9518290 eq yeay au ul yoeq 92810 juepuedepul au nd uay L 5104100 pepeus TA 018175 oyeui 4ueuefueure 90101199 au 0 9522 UMOp palind si ueuM 29921 92178 7 5 91 41 2 le pulag M3IA 97 91 61 1 06172 1 2 10 h mm 2 Sen 1 1900 urejq fuosseooy 22 8 1 10 ajoy 1noyoouy 8 i i 4 i 5 001 0 91 01 6 aeu use 10 ejou 1noxoouy 1 ae i edid urep 10 noyoouy 9 g peue jepis edid
12. Back CA Ahead Timer On Off button Set Day button Fan Speed button Filter 41 button L B Temp C OMENU Sal FILTER 2 BACK MONITOR SET DAY 385 46 TEST 2 lt Enter gt button PAR 21MAA amp CLOCK IN V OPERATION A CLEAR Test Run button Check button Clear button m Airflow Up Down button Opening the cover Ni Louver button Built in temperature sensor 57 Operation button To return operation number Ventilation button A Operation button To go to next operation number Note e PLEASE WAIT message This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure e NOT AVAILABLE message This message is displayed if an invalid button is pressed to operate a function that the indoor unit does not have If a single remote controller is used to operate multiple indoor units simultaneously that are different types this message will not be displayed as far as any of the indoor units is equipped with the function 5 e wireless remote controller Opt
13. Measure the resistance between the terminals with a tester Winding temperature 68 F Abnormal Open or short Normal 2900 Drain float switch FS Option i Moving part Measure the resistance between the terminals with a tester Switch State of moving part Normal Abnormal gem m 1 Magnet UP Short Other than short 2 3 DOWN Open Other than open 2 i see sensor Option 413 211 BlueBlackPink Brown Turn on the indoor unit with the black plastic tape on the outside of i see sensor controller board sensor rotates then pull out the connector of motor for i see sensor GWith electricity being turned on measure the power voltage between connectors with tester A Black plastic tape m i see sensor At the ambient temperature of 50 F 104 F i see sensor connector Normal DC 1 857V 3 132V O DC 0 939V 1 506V NOTE Be careful not to discharge static electricity into electronic device Abnormal Other than the normal Other than the normal Vane motor for i see sensor Option White Blue Yellow Orange Red Measure the resistance between the terminals with a tester At the ambient temperature of 68 F 86 F Connector Normal Abnormal Red Yellow Red Blue Red Orange Red White 2500 O
14. Room temperature thermistor TH1 Electrical box Removing the fan motor and right side fan 1 Remove the air intake grille See Figure 1 2 2 Remove the beam by removing 1 screw 4 8 PT See Photo 1 8 Remove 2 screws from the electrical cover and remove the electrical cover 4 Remove 2 screws from the electrical box and pull the electrical box downward 5 Temporarily secure the electrical box using 2 hooks in the back of electrical box 6 Remove the lower casing while pressing the 4 catches of the casing right side of the fan motor See Photo 6 7 Loosen the 2 set screws 2 hexagon set screws of con necting joint and slide the fan motor to the left See Photo 5 8 Remove the screw for motor earth wire See Photo 5 9 Remove the motor piece left and right each 1 screw See Photo 5 10 Remove the fan motor and right side fan together 11 Loosen the set screw hexagon set screw of fan and remove the fan from the shaft See Photo 7 8 Photo 8 Hexagon set screw Photo 5 Motor piece fixing screws Connecting joint Motor earth wire Fan motor bd fixing screw Casing Casing Electrical box Photo 6 Casing Catches Catches Photo 7 Hole for driver OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS 5 Removing the fan 3 connection 1 Remove the air intake grille See Figure 1 2 2 Remove the beam by removing 1 screw 4 8 PT See
15. board Check resistance value of thermistor For characteristics refer to P1 above Check contact failure of connector CN44 on the indoor controller board Refer to 9 7 Turn the power on and check restart after inserting connector again Operate in test run mode and check pipe con denser evaporator gt temperature with outdoor controller circuit board If pipe lt condenser evaporator gt temperature is exclu sively low in cooling mode or high in heating mode refrigerant circuit may have defect Operate in test run mode and check pipe con denser evaporator gt temperature with outdoor control circuit board If there is extreme difference with actual pipe lt condenser evaporator gt temperature replace indoor controller board There is no abnormality if none of above comes within the unit Turn the power off and on again to operate In case of checking pipe temperature with outdoor controller circuit board be sure to connect A control service tool PAC SK52ST Forced compressor stop due to water leakage abnormality The unit has a water leakage abnor mality when the following conditions a and b are satisfied while the above mentioned detection is performed a The intake temperature subtracted with liquid pipe temperature detects to be less than 10 C 14 F for a total of 30 minutes When the drain sensor is detected to be NOT soaked in the water the detection record of a
16. liquid or condenser evaporator gt temperature is detected as over 70 C 158 F after the compressor started Abnormal if the temperature of over 70 C 158 F is detected again within 10 minutes after 6 minute resume prevention mode Cooling or drying mode Clogged filter reduced airflow Short cycle of air path Low load low temperature operation out of the tolerance range Defective indoor fan motor Fan motor is defective Indoor controller board is defec tive Defective outdoor fan control Overcharge of refrigerant Defective refrigerant circuit clogs Heating mode Clogged filter reduced airflow Short cycle of air path G Overload high temperature operation out of the tolerance range Defective indoor fan motor Fan motor is defective Indoor controller board is defec tive Defective outdoor fan control Overcharge of refrigerant C Defective refrigerant circuit clogs Bypass circuit of outdoor unit is defective Cooling or drying mode Check clogs of the filter Remove blockage Refer to 9 6 Check outdoor fan motor Check operating condition of refrigerant circuit Heating mode Check clogs of the filter Remove blockage Refer to 9 6 Check outdoor fan motor 9 Check operating condition of refrigerant circuit Pipe temperature Cooling mode Detected as abnormal when the pipe tem
17. perature is not in the cooling range 3 min utes after compressor start and 6 minutes after the liquid or condenser evaporator pipe is out of cooling range Note 1 It takes at least 9 minutes to detect Note 2 Abnormality P8 is not detected in drying mode Cooling range 3 deg C 5 4deg FJ2 TH TH1 TH Lower temperature between liquid pipe temperature TH2 and condenser evaporator temperature TH5 TH1 Intake temperature Heating mode When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished the unit is detected as abnormal when condenser evaporator pipe temperature is not in heat ing range within 20 minutes Note 3 It takes at least 27 minutes to detect abnormality Note 4 It excludes the period of defrosting Detection restarts when defrosting mode is over Heating range deg C 5 4deg F S TH5 TH1 Q Slight temperature difference between indoor room temperature and pipe liquid or condenser evaporator gt temperature thermistor Shortage of refrigerant Disconnected holder of pipe liquid or condenser evaporator thermistor Defective refrigerant circuit Converse connection of extension pipe on plural units connection Converse wiring of indoor outdoor unit connecting wire on plural units connection Defective detection of indoor room temperature and pipe lt condenser evaporator gt temperature thermistor Stop valv
18. 325V ds CN3C RECTIFICATION FUSE 5 1 21 8 BLU Gwl CN41 WHT 12 9 9 21 9 9 9 9 mEMOCON LED3 LED LEDI 4 1 CN22 t RED owe BLU FLOAT SW LIQUID PIPE INTAKE us E M GRN WHT ja gr up A e ao s 0 MT si se AE 00020 00 09 9 o 810 4 5 5 M A ERAN 5 SEE 7 71 77 When attaching When attaching MG SENSOR NA drainpump drain pump THS Dei PIETS omm optional parts optional parts M SEE SENSOR remove the OPTIONAL PARTS jumper 41 Be sure to turn off the source power MV RUF dd and then disconnect fan motor connector the drain float 5 Failure to do so will cause trouble in Fan motor switch FB ze Notes 1 Symbols used in wiring diagram above Connector Terminal block 2 Indoor and outdoor connecting wires are made with polarities make wiring matching terminal numbers S1 S2 S3 3 Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing X1 Use copper supply wire 12 8 REFRIGERANT SYSTEM DIAGRAM 24 4 4 6 4 42 4 Strainer 50 Heat exchanger Refrigerant GAS pipe connection Flare Condenser evaporator temperature therm
19. Main indoor unit should be connected for wired remote controller and the transmission line TB5 for main and sub unit should also be connected Refer to Fig 1 This function cannot be set by IR wireless remote controller Set refrigerant address of each unit Dip switch on the outdoor unit Refrigerant address 00 01 Operation pattern Fig 1 Refrigerant address Refrigerant address Back up function only Request code number 312 Error occurs on main unit Start operation Main Sub Sub unit Rotation function amp Back up function Request code number 313 318 Error occurs on main unit Start operation Main Sub Sub Main Main Sub OC Outdoor unit IC Indoor unit Main Abnormal condition unit 7 orma RC Wired remote controller IC 1 Run Stop Run L Sub unit IC 2 1 1 1 gt 1 28 days 1 28 days Ex When the request code number is 313 each unit operates alternately in daily cycle Note When the unit is restarted to operate after turning off the power or OFF operation the unit which was operating will start oper ation operate the main unit refer to the 10 1 2 and set the request code No which is not the same as the current one and set again the former request code No 2 2nd stage cut in function Outline of functions When the 1st unit can NOT supply with suffi
20. Photo 1 8 Remove 2 screws from the electrical cover and remove the electrical cover 4 Remove 2 screws from the electrical box and pull the electrical box downward Temporarily secure the electrical box using 2 hooks in the back of electrical box 5 Remove 2 screws from the left side beam and remove the beam See Photo 9 6 Loosen 2 set screws 2 hexagon set screws of connect ing joint See Photo 5 7 Remove 3 lower casings while pressing each 4 catches of the casing See Photo 6 8 Remove the 4 screws from the bearing support See Photo 10 9 Slide the connecting joint to the left and remove the fans and shaft together See Photo 11 10 Remove the fans from the shaft See Photo 7 8 Photo 11 Fans 3 connection Bearing support Photo 9 Photo 10 Bearing support Bearing sup port fixing screws 6 Removing the side panel 1 Remove the air intake grille See Figure 1 2 2 Remove the screws from the side panel and remove the side panel by sliding the panel to the front 3 Unhook the side panel support hanger and then slide the side panel forward to remove it 33 Figure 3 Sliding the panel to the front Side Figure 4 Hole for side panel N Side panel support hanger pp support hanger OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS 7 Removing the vane motor Photo 12 1 Remove the air intake See F
21. clean the filter E3 Timer indicators The indicator comes on if the corre sponding timer is set Timer 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 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 Hour Only indicator Louver display Displays if the airflow is set to 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 6 Power On indicator also changes Indicates that the power is on ON OFF button MITSUBISHI ELECTRIC Monitor Set button Mode button Return button J Set Time buttons
22. of outdoor controller circuit board Defective transmitting receiving circuit of indoor controller board Noise has entered into indoor outdoor unit connecting wire Check LED display on the outdoor control circuit board Connect A control service tool PAC SK52ST Refer to EA EC item if LED displays EA EC Check disconnection or looseness of indoor outdoor unit connecting wire of indoor unit or outdoor unit Check all the units in case of twin indoor unit system Turn the power off and on again to check If abnormality generates again replace indoor controller board or outdoor controller circuit board Other indoor controller board may defect in case of twin indoor unit system Indoor outdoor unit communication error Transmitting error Abnormal if indoor controller board receives 1 30 times continuously when indoor controller board transmits 0 signal Defective transmitting receiving circuit of indoor controller board Noise has entered into power supply 9 Noise has entered into outdoor control wire Turn the power off and on again to check If abnormality generates again replace indoor controller board Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board Defective indoor controller board Replace indoor controller board Remote controller control board Abnorm
23. up heating CN22 Connect to the terminal block TB5 Remote controller connecting wire 10 4 14 6V DC CN3C Transmission Indoor outdoor 0 24V DC CNMF Fan motor DC 294 325V Y DC15V 1 Vcc Voltage between pins of C955 15VDC Same as of CNMF CNO1 Connect to the Terminal Block TB4 Indoor outdoor connecting line Between 208 230V AC FUSE 6 3A 250V Drain pump output DP lt 208 230 AC option b Ag lt gt CAUTION WE 25 225 un oaa 26 9 8 FUNCTIONS OF SWITCH AND JUMPER WIRE Each function is controlled by the dip switch and the jumper wire on control P C board SW1 and SW2 are equipped only for service parts Model setting and capacity setting are memorized in the nonvolatile memory of the control P C board of the unit The black square m indicates a switch position Jumper wire Short X Open Functions Setting by the dip switch and jumper wire Remarks For service board Model settings MODELS Service board 2345 24 4 4 Capacity settings PCA A36KA4 42 4 Wireless remote Contro setting Initial setting controller setting J44 J42 IR wireless remote controller 0 C
24. 5195 995 1 pue 9 96 01 9 E 192 SXEIULJIV 02 19208 ure fuosseooy Bum 10 ejou 8 001 91 01 6 elur usej 10 noyoouy 1 Juewefuene edid 1eddn 10 1100009 9 uonoeuuoo parey apis edid pinbi uomoeuuoo edid juejeDujeg 5 edid edid 1ueJeujeg v Duidid urejp 10 ejou jnoyoouy ye eu 10 uonoeuuoo edid eureud 9 uonoeuuoo edid eDeureiq 1 1 paesu s jexoos ueuM 9v2 9 111 6 662 91 6 6 901593 8611791 6 77 F X i 3 T i i NE E t E t alg i t g 5 gt S S IS 1 ES S 88 8 6 ceu9uez ker e 15 6 amp 2 S 8 1 91 6 9 wait 082178 5 05 F IS
25. ANE MOTOR DP DRAIN PUMP RFI RADIO FREQUENCY INTERFACE FOR RF THERMOSTAT FS DRAIN FLOAT SWITCH R B WIRED REMOTE CONTROLLER BOARD TB6 TERMINAL BLOCK REMOTE CONTROLLER TRANSMISSION LINE Table 2 SW2 CAPACITY CODE SW2 MODELS Service MODELS Service PCALADAKAA 4 REEL on Refer to tables 1 and 2 lt Table 1 gt SW1 MODEL SELECTION OFF OFF Swi 5 12345 12345 Service PCA A30KA4 ON PCA A42KA4 N 2 Hiis 2b E n T ON The black square m indicates a switch position 4 TRANSMISSION 7 WIRES 2 TB4 2012 YWY 157 RN TO OUTDOOR is Hh ORN 52 E 9 VANE CNV WHT J41 J42 CN32 555 OUTDOOR 1 3 5 20 18 16 14 12 10 8 6 4 2 swi swe WHT 3 5 5 ORN F PE CN24 DOOR DOOR BRN CNSLQWHD COMMUNICATION DC204
26. B LINE 6 4 High 43 42 4 High 45 gt Medium1 41 Medium1 43 Medium2 39 Medium2 41 o e Low 37 2 4 Low 39 2 4 90 r r r 1 1 90 j 80 k _ 80 H E 5 5 70 5 70 1 5 NC 70 5 i i Hhem 2 2 RO li E 2 e 1 60 60 1 5 io d T s E F 1 5 50 50 9 50 9 L 8 40 2 40 2 2 2 ES INC 40 2 2 30 8 30 16 30 5 4 F 5 o L o 20 APPROXIMATE F F 20 APPROXIMATE THRESHOLD OF THRESHOLD HEARING FOR 20 HEARING FOR CONTINUOUS E CONTINUOUS NOISE E F NOISE 10 T T E 10 i 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz ceiling about 4 62ft MICROPHONE OUTLINES AND DIMENTIONS 6 h mm inc Uni Ajuo eq edid jue1eBujei sued uondo uresp eui Buijpejsur uaym ans aq 9508147 19008 Ufe p VAY 88 se 6 8 8 pnby 4 PCA A24KA4 7104 JOYOUR 10 MJIS g EM 10 OLW 990 SALON duej uonesado due ag ce 2105195 9951 Duneer uos lt Buyoog gt YMS uoyesedo E 4 Sped jeuondo 1osues 995 1 pue 1810002 8091 SS9jGJIM 0 9580 U 9 2 91 11 6 862 91 6 6 peuondo 10
27. MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS SPLIT TYPE AIR CONDITIONERS SERVICE MANUAL Series Ceiling Suspended Indoor unit Model names Service Ref 24 4 24 KAA 4 0 4 6 4 PCA A36 KAA 42 4 42 4 Changes for the Better November 2010 No OCH484 R410A NOTE This manual describes only service data of the indoor units RoHS compliant products have G mark on the spec name plate INDOOR UNIT Model name indication ISTE WIRED REMOTE Intertek CONTROLLER Option IR WIRELESS REMOTE 33223 CONTROLLER Option CONTENTS 1 REFERENCE 4 2 2 SAFETY 4 3 3 PART NAMES AND 4 4 SPECIFICATIONS 222222 7 5 NOISE CRITERION 9 6 OUTLINES AND 6 10 7 WIRING DIAGRAM nnn nnns 12 8 REFRIGERANT SYSTEM DIAGRAM 13 9 5 4 eese 14 10 SPECIAL 28 11 DISASSEMBLY 31 PARTS CATALOG 484 SD SUMI 1 REFERENCE MANUAL
28. Reset error code logs and restart the unit after finishing service GThere is no abnormality in electrical component controller board remote controller and etc Not logged the abnormal symptom trouble shooting and ascertain the cause of the trouble according to 9 4 Troubleshooting by inferior phenomena GContinue to operate unit for the time being if the cause is not ascertained There is no abnormality concerning of parts such as electrical component controller board remote controller and etc 14 9 2 MALFUNCTION DIAGNOSIS METHOD BY REMOTE CONTROLLER lt in case of trouble during operation gt When a malfunction occurs to air conditioner both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop lt Malfunction diagnosis method at maintenance service alR wireless remote controller Procedure 1 Press the CHECK button twice CHECK lights and refrigerant Refrigerant Hl 4M MITSUBISHI ELECTRIC address address 00 blinks display Check that the remote controller s CHECK display has stopped before continuing display 2 Press the temperature 0
29. Select the refrigerant address of the Temperature buttons indoor unit for the self diagnosis ONOFF TEMP Note Set refrigerant address using the outdoor unit s switch SW1 ON OFF button For more information see the outdoor unit installation manual eo FAN AUTOSTOP 0 0 a MODE VANE rosis Point the remote controller at the If an air conditioner error occurs the amp 5 1 sensor on the indoor unit and indoor unit s sensor emits an intermit CHECK 8 press the HOUR button tent buzzer sound the operation lamp min blinks and the error code is output button It takes 3 seconds at most for error ser er code to appear 4 Point the remote controller at the The check mode is cancelled sensor on the indoor unit and press the ON OFF button mWired remote controller Turn on the power Press the CHECK button twice 9 Set address with TEMP button if system control is used Press the ON OFF button to stop the self check CHECK button a Address SELF CHECK Ji NET TEMP button 005 IC Indoor unit zu OC Outdoor unit LILI e O ONOFF 1 Check code No trouble generated in the past Mm No corresponding unit XN Unit No 72 62 AL Timer ON OFF button LILI el To delete check code Display the error code
30. When RC is displayed remote con trollers have no problem Turn the power off and on again to check If abnormality generates again replace indoor controller board b When RC is displayed replace remote controller c When RC or ERC 00 06 is dis played noise may be causing abnormality If the unit is not normal after replacing indoor controller board in group control indoor controller board of address 0 may be abnormal Error Code Abnormal point and detection method Cause Countermeasure Remote controller transmission error E3 signal receiving error E5 Abnormal if remote controller could not find blank of transmission path for 6 sec onds and could not transmit Error code Remote controller receives transmitted data at the same time compares the data and when detecting it judges different data to be abnormal 30 continuous times Error code Abnormal if indoor controller board could not find blank of transmission path Error code E5 Indoor controller board receives trans mitted data at the same time compares the data and when detecting it judges different data to be abnormal 30 continuous times Error code E5 2 remote controllers are set as main In case of 2 remote con trollers Remote controller is connected with 2 indoor units or more 9 Repetition of refrigerant address Defective transmitting r
31. al if data cannot be read nor mally from the nonvolatile memory of the remote controller control board Error code E1 Abnormal if the clock function of remote controller cannot be operated normally Error code E2 Defective remote controller 21 Replace remote controller 9 4 TROUBLESHOOTING BY INFERIOR Note Refer to the manual of outdoor unit for the detail of remote Phenomena controller Cause Countermeasure 1 Upward downward vane performance failure The is not downward during defrosting and heat preparation and when the thermostat is OFF in HEAT mode Working of COOL protection function Vane motor does not rotate Defective vane motor Breaking of wire or connection failure of connector Upward downward vane does not work The vane is set to fixed position Normal operation The vane is set to horizontal regardless of remote control Check left Check the vane motor Refer to How to check the parts Check for breaking of wire or connec tion failure of connector Normal operation Each connector on vane motor side is disconnected or set ting the fixed vanes by wired remote controller 2 Receiver for IR wireless remote controller Weak batteries of IR wireless remote controller Contact failure of connector CNB on IR wireless remote controller board Insert failure C
32. and 4 of the fan connector Voc DC294 325V TEST POINT Vcc between 5 and 4 of the fan connector Vcc DC15V Is the voltage normal Replace the fan motor b Yes No Check the operation END Replace indoor controller board Replace indoor controller board OK Check the operation END 4 Replace the fan motor 25 9 7 TEST POINT DIAGRAM Indoor controller board PCA A24KA4 PCA A30KA4 PCA A36KA4 PCA A42KA4 LED3 CN90 Transmission CN2L Connect to the IR wireless Indoor outdoor Connector LOSSNAY remote controller board CNB CNV CN4Y Vane motor output MV i see sensor option 12V pulse output CN6Y SW1 sensor motor option Model selection 5 2 CN105 Capacity setting am Jumper wire 41 42 Radio frequency interface Pair No setting for IR wireless LED2 remote controller Power supply R B SWE Drain float switch FS Emergency operation option CN51 CN44 Centrally control Pipe temperature Control signal thermistor 13VDC pulse input Liquid TH2 Operation indicator Cond Eva TH5 13VDC Malfunction indicator CN20 13VDC Room temperature CN41 thermistor Connector HA terminal A LED1 CN24 Power supply I B CN30 Connector LLC Connector Back
33. and b will be cleared b Drain float switch detects to be in the water for more than 15 minutes Once the water leakage abnormality is detected abnormality state will not be released until the main power is reset Drain pump trouble Drain defective Drain pump clogging Drain pipe clogging Open circuit of float switch Contact failure of float switch connector Dew condensation on float switch Drain water descends along lead wire Drain water waving due to filter clogging amp Extension piping connection difference at twin triple quad ruple system Miswiring of indoor outdoor connecting at twin triple quad ruple system Room temperature thermistor liquid pipe temperature thermis tor detection is defective Check the drain pump Check whether water can be drained Check the resistance of the float switch Check the connector contact failure Check the float switch leadwire mounted Check the filter clogging amp Check the piping connection Check the indoor outdoor connecting wires Check the room temperature display of remote controller Check the indoor liquid pipe temperature dis play of outdoor controller board Remote controller transmission error E0 signal receiving error E4 Abnormal if main or sub remote con troller cannot receive any transmission normally from indoor unit of refrigerant address 0 for 3 minutes Error code EO
34. ane support Vane zl i Vane motor side a 7 OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS 13 Removing the heat exchanger Photo 22 1 Remove the air intake grille See Figure 1 2 2 Remove the beam See Photo 1 3 Remove the electrical cover See Photo 1 4 Pull the electrical box downward See Photo 2 5 Remove the left and right side panels See Figure 3 6 Remove the under panel See Photo 14 7 Remove the drain pan See Photo 15 16 17 I a 7 Heat exchanger 8 Remove the pipe cover See Photo 18 9 Remove the pipe thermistors TH2 and TH5 from each holder See Photo 19 X 10 Remove the pipe band fixing screw and remove the Pipe band pipe band See Photo 22 11 Remove 2 screws from the heat exchanger remove the heat exchanger Pipe band fixing Screw Photo 23 Heat exchanger fixing screws Heat exchanger Vane s MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2010 MITSUBISHI ELECTRIC ENGINEERING CO LTD New publication effective Nov 2010 Distributed in Nov 2010 No OCH484 Specifications subject to change without notice Made in Japan
35. cient capacity for exceptionally high demand conditions and the actual room temperature reaches set point the 2nd unit starts operation in conjunction with the 1st unit Once the actual room temperature goes down to 4 degrees C 7 5 degrees F below set point the 2nd unit stops operation automatically set point set temperature by remote controller 4 6 8 C 7 5 10 8 14 4 F selectable Number of operating units is determined according to the room temperature and set point When room temperature becomes higher than set point standby unit starts 2 units operation When room temperature falls below set point 4 C 7 5 F standby unit stops 1 unit operation 28 System constraint This function is available only in cooling mode EX porte beds 5 68 F m 2nd stage cut in When request code number is 323 Room temp Set point Room temp lt Set point 4 C 7 5 F i Start operation Sub unit start operation Sub unit stop 26C 2nd unit Cut in i Main 79 F uni ICA 4 degree C i 2 7 5 degreeF 22 2nd unit Cut out pes 71 5 F 2 20 i 68 10 1 2 How to set rotation function function 2nd stage function You can set these functions by wired remote controller Maintenance monitor NOTE Both main and sub unit should be set in same setting Every time replacing indoor cont
36. d z 104 JOYOUR 104 M9J9S g CM 10 OLN 95011 SALON 09271 01 M3IA 11 7 WIRING DIAGRAM 24 4 4 6 4 42 4 LEGEND SYMBOL NAME SYMBOL NAME LB INDOOR CONTROLLER BOARD TB4 TERMINAL BLOCK INDOOR OUTDOOR CONNECTING LINE CN2L CONNECTOR LOSSNAY TB5 TB6 TERMINAL BLOCK REMOTE CONTROLLER CN24 CONNECTOR BACK UP HEATING TRANSMISSION LINE CN30 CONNECTOR LLC TH1 ROOM TEMP THERMISTOR 32 F 15kQ 77 F 5 4kQ DETECT 32 CONNECTOR REMOTE SWITCH CN41 CONNECTOR HA TERMINAL A TH2 CN51 CONNECTOR CENTRALLY CONTROL PIPE TEMP THERMISTOR LIQUID 32 F 15 77 F 5 4kQ DETECT CN105 CONNECTOR RADIO FREQUENCY INTERFACE TH5 FUSE FUSE T6 3AL250V COND EVA TEMP 32 F 15kQ 77 F 5 4kQ DETECT HERMISTOR LED1 POWER SUPPLY I B OPTIONAL PARTS LED2 POWER SUPPLY W B PCB FOR IR WIRELESS REMOTE CONTROLLER LED3 TRANSMISSION INDOOR OUTDOOR BZ BUZZER 511 SWITCH MODEL SELECTION See table 1 LED1 LED OPERATION INDICATION GREEN Sw2 SWITCH CAPACITY CODE See table 2 LED2 LED PREPARATION FOR HEATING ORANGE SWE CONNECTOR EMERGENCY OPERATION RU RECEIVING UNIT Xi RELAY DRAIN PUMP SW1 EMERGENCY OPERATION HEAT DOWN MF FAN MOTOR SW2 EMERGENCY OPERATION COOL UP MV V
37. e is not opened completely 19 Check pipe liquid or condenser evap Check converse connection of extension pipe or converse wiring of indoor outdoor unit connecting wire orator temperature with room tempera ture display on remote controller and outdoor controller circuit board Pipe liquid or condenser evaporator gt temperature display is indicated by set ting SW2 of outdoor controller circuit board as follows controller circuit board after connecting Conduct temperature check with outdoor A Control Service Tool PAC SK52ST Error Code Abnormal point and detection method Cause Countermeasure Pipe temperature thermistor Condenser Evaporator TH5 The unit is in 3 minute resume protec tion mode if short open of thermistor is detected Abnormal if the unit does not get back to normal within 3 minutes The unit returns to normal operation if it has been reset normally Constantly detected during cooling drying and heating operation except defrosting Short 90 C 194 F or more Open 40 C 40 F or less Defective thermistor characteristics Contact failure of connector 44 on the indoor controller board Insert failure Breaking of wire or contact failure of thermistor wiring Temperature of thermistor is 90 C 194 F or more or 40 C 40 F or less caused by defective refrigerant circuit Defective indoor controller
38. eceiving circuit of remote controller Defective transmitting receiving circuit of indoor controller board Noise has entered into trans mission wire of remote control ler Set a remote controller to main and the other to sub Remote controller is connected with only one indoor unit The address changes to a separate setting Diagnose remote controller a When RC is displayed remote con trollers have no problem Turn the power off and on again to check When becoming abnormal again replace indoor controller board b When RC is displayed replace remote controller c When RC or 00 66 is dis played noise may be causing abnormal ity Indoor outdoor unit communication error Signal receiving error Abnormal if indoor controller board cannot receive any signal normally for 6 minutes after turning the power on Abnormal if indoor controller board cannot receive any signal normally for 3 minutes Consider the unit as abnormal under the following condition When 2 or more indoor units are connected to an outdoor unit indoor controller board cannot receive a signal for 3 minutes from outdoor controller circuit board a signal which allows outdoor controller circuit board to transmit signals Contact failure short circuit or miswiring converse wiring of indoor outdoor unit connecting wire Q Defective transmitting receiving circuit
39. igure 1 2 Connector Vane motor and cover Remove 2 screws of vane motor cover then remove vane motor Screws Removing the under panel Photo 13 1 Remove the air intake grille See Figure 1 2 2 Remove the left and right side panels See Figure 3 3 Remove the beam See Photo 1 4 Remove the electrical cover See Photo 1 5 Pull the electrical box downward See Photo 2 6 Wireless remote controller receiver type only Disconnect the connector CNB from the PCB for wire less remote controller and remove the clamp and strap for wires 7 Remove 8 screws from the under panel Under panel fixing 8 Move the under panel forward by about 7 16 in 10 mm screws and remove the under panel Removing the drain pan Photo 14 1 Remove the air intake grille See Figure 1 2 2 Remove the side panel right and left See Figure 3 3 Remove the under panel See Photo 13 Remove the screws of the right and left side drain pan See Photo 14 4 Remove 2 insulation in centre of the drain pan and after removing 2 screws with washer remove the drain pan See Photo 15 16 Drain pan Note fixing Screws Please be aware that there might be some drainage left in EU Drain pan the drain pan when you remove the drain pan Photo 15 Photo 16 Insulations Screw with washer 2 locations 34 OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS 10 Removing the thermisto
40. ion CHECK TRA display Indicate that the unit is being checked or test run MODEL SELECT display Blinks when model is selected OPERATION MODE display OPERATION MODE display Indicates which operation mode is in effect display The vertical direction of airflow is indicated Pal display Displays selected fan speed ON OFF button The unit is turned ON and OFF alternately each time the button is pressed FAN SPEED SELECT button Changes the fan speed MODE SELECT button Switches the operation mode between COOLING DRY FAN HEATING and AUTO mode case the outdoor unit is cooling only type the heating and auto mode are not available CHECK TEST RUN button Performs an inspection check or test operation Do not use it for normal operation VANE CONTROL button Changes the air flow direction AUTO STOP AUTO START 1 RESET CLOCK Q B S 0 0 0 0 0 0 0 J display Lights up while the signal is transmitted to the indoor unit when the button is pressed Temperature setting display Indicates the desired temperature setting which is set CLOCK display Displays the current time TIMER display Displays
41. ion 2 Press the TEST button for seconds so that Maintenance mode appears the screen After a while 00 appears in the refrigerant address number display area at 8 3 Press the CHECK button for seconds to switch to Maintenance monitor Note It is not possible to switch to Maintenance monitor during data request in maintenance mode i e while is blinking since no buttons are operative appears on the screen when Maintenance monitor is activated The display now allows you to set a request code No 4 Press TEMP Y A buttons i to select the desired refrigerant address 5 Press the CLOCK and A buttons to set the desired request code 311 318 321 324 6 Press the FILTER button to perform function setting If above setting operations are done correctly Request code number will appear in data display area Example When the 311 of Request code number is set 311 appears on the screen Refererence You can check current request code number setting by setting the request code number 310 or 320 and pressing the FILTER Example When the current setting is Setting No 2 Request code 311 311 appears on the screen 7 To return to normal mode press the button 10 2 BACK UP HEATING FUNCTION CN24 Temperature diffe
42. istor 5 Refrigerant flow in cooling Refrigerant flow in heating Cor Flare 1 Pipe temperature Room temperature thermistor liquid thermistor TH1 TH2 Distributor P d with strainer 1 2 50 50 13 Refrigerant LIQUID pipe connection 9 TROUBLESHOOTING 9 1 TROUBLESHOOTING Error code display by self diagnosis and actions to be taken for service Summary gt Present and past error codes are logged and displayed on the wired remote controller or controller board of outdoor unit Actions to be taken for service and the trouble reoccurrence at field are summarized in the table below Check the contents below before investigating details Unit conditions at service Error code Actions to be taken for service Summary Displayed The trouble is reoccurring Judge what is wrong and take a corrective action according to 9 3 Self diagnosis action table Not displayed Conduct troubleshooting and ascertain the cause of the trouble according to 9 4 Troubleshooting by inferior phenomena The trouble is not reoccurring Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor poor connection of wiring noise and etc Re check the symptom and check the installation environment refrigerant amount weather when the trouble occurred matters related to wiring and etc
43. ler board Refer to 9 7 Turn the power on and check restart after inserting connector again Check pipe liquid temperature with remote controller in test run mode If pipe liquid temperature is extremely low in cooling mode or high in heating mode refrigerant circuit may have defect Check pipe liquid temperature with remote controller in test run mode If there is extremely difference with actual pipe liquid temperature replace indoor controller board Turn the power off and on again to operate after check Contact failure of drain float switch Extract when the connector of drain float Switch is disconnected amp and of connector CN4F is not short circuited Constantly detected during operation Contact failure of connector Insert failure Defective indoor controller board Check contact failure of float switch connec tor Turn the power on again and check after inserting connector again Operate with connector short circuited Replace indoor controller board if abnormalit reappears Drain overflow protection operation Suspensive abnormality if drain float switch is detected to be underwater for 1 minute and 30 seconds continuously with drain pump on Turn off compressor and indoor fan Drain pump is abnormal if the condition above is detected during suspensive abnormality Constantly detected during drain pump operation
44. mmAq O direct blow Operation control amp Thermostat Remote controller amp built in Noise level Low Medium2 Medium1 High 33 35 37 40 Field drain pipe O D 26 1 1 32 Dimensions 1 280 50 3 8 680 26 3 4 230 9 1 16 Weight Service Ref PCA A30KA4 Power supply phase cycle voltage 1 phase 60Hz 208 230V Max Fuse Size 15 Min Circuit Ampacity 1 External finish White Munsell 6 4Y 8 9 0 4 Heat exchanger Plate fin coil Fan Fan drive x No Sirocco fan direct x 3 Fan motor output kW 0 095 Fan motor F L A 0 54 Airflow Low Medium2 Mediumt High me min CFM Dry 16 17 18 20 565 600 635 705 Wet 15 16 17 19 530 565 600 670 External static pressure O direct blow Operation control amp Thermostat Remote controller amp built in Noise level Low Medium2 Medium1 High 35 37 39 41 Field drain pipe O D 26 1 1 32 Dimensions 1 280 50 3 8 680 26 3 4 230 9 1 16 Weight Service Ref 6 4 Power supply phase cycle voltage 1 phase 60Hz 208 230V Max Fuse Size 15 Min Circuit Ampacity 2 External finish White Munsell 6 4Y 8 9 0 4 Heat exchanger Plate fin coil Fan Fan drive x No Sirocco fan direct x 4 Fan motor output kW 0 160 Fan motor F L A
45. ndicates ollowing table Output pattern A Errors detected by indoor unit IR wireless remote controller Wired remote controller Beeper sounds OPERATION INDICATOR lamp blinks Check code Symptom Remark Number of times 1 P1 Intake sensor error 2 P2 Pipe TH2 sensor error P9 Pipe TH5 sensor error 3 E6 E7 Indoor outdoor unit communication error 4 P4 Float switch connector CN4F open 5 P5 Drain pump error PA Forced compressor stop due to water leakage abnormality 6 P6 Freezing Overheating protection operation 7 EE Communication error between indoor and outdoor units 8 P8 Pipe temperature error 9 E4 E5 Remote controller signal receiving error 10 11 12 Fb Indoor unit control system error memory error etc EO Remote controller transmission error 1 2 Remote controller control board error Output pattern B Errors detected by unit other than indoor unit outdoor unit etc IR wireless remote controller Wired remote controller Beeper sounds OPERATION S INDICATOR lamp blinks Check code ype ema Number of times 1 E9 Indoor outdoor unit communication error Transmitting error Outdoor unit 2 UP Compressor overcurrent interruption 3 03 04 of outdoor unit thermistors 2 4 Compressor overcurrent interruption When compressor locked 2 Ep s 5 U2 Ab
46. normal high discharging temperature 49C operated of the outdoor insufficient refrigerant controll r board 6 U1 Ud Abnormal high pressure 63H operated Overheating As for outdoor protection operation unit refer to 7 U5 Abnormal temperature of heatsink outdoor unit s 8 U8 Outdoor unit fan protection stop service manual 9 U6 Compressor overcurrent interruption Abnormal of power module 10 07 Abnormality of superheat due to low discharge temperature 11 U9 UH Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit Current sensor error 12 13 14 Others Other errors Refer to the technical manual for the outdoor unit 1 If the beeper does not sound again after the initial 2 beeps to confirm the self check start signal was received and the OPERATION INDICATOR lamp does not come on there are no error records 2 f the beeper sounds 3 times continuously beep beep beep 0 4 0 4 0 4 sec after the initial 2 beeps to confirm the self check start signal was received the specified refrigerant address is incorrect 16 On IR wireless remote controller The continuous buzzer sounds from receiving section of indoor unit Blink of operation lamp On wired remote controller Check code displayed in the LCD Refer to the previous page check code If the unit cannot be operated properly after the test run refer to the following table to find out the cau
47. on the self check result display screen The address for self check will blink when the ON OFF button is pressed twice within 3 seconds To be continued to the next page 15 Refer to the following tables for details on the check codes Output pattern A code in the following table i e 5 for U2 the check code in the Beepersounds Beep Beep Beep Beep Beep Beep Beep operation _ 1L e n MN 184 Repeated INDICATOR PW 5 gt lamp blink Off On On On Off On On pattern Self check Approx 2 5 sec 0 5 sec 0 5 sec 0 5 sec 0 5 sec Approx 2 5 sec 0 5 sec 0 5 sec starts x v J Start signal a i me received Number of blinks beeps in pattern indicates the check Number of blinks beeps in pattern indicates code in the following table i e 5 for P5 the check code in the following table Output pattern B sounds Beep Beep Beep OPERATION _ 1 e 3 n isl 2 Repeated INDICATOR gt lt gt lamp blink Off On On On On On Off On On pattern Self check Approx 2 5 sec Approx 3 sec 0 5 sec 0 5 sec 0 5 sec 0 5 sec Approx 2 5 sec Approx 3 sec 0 5 0 5 sec starts M v 7 Start signal 1 7 nt received Number of blinks beeps in pattern indicates the check Number of blinks beeps in pattern i
48. ontact failure of connector CN90 on indoor con troller board Insert failure Contact failure of connector between IR wireless remote controller board and indoor controller board 22 Replace batteries of IR wireless remote controller Check contact failure of each connector If no problems are found of connector replace indoor controller board When the same trouble occurs even if indoor controller board is replaced replace IR wireless remote controller board 9 5 EMERGENCY OPERATION 9 5 1 When IR wireless remote controller fails or its battery is exhausted When the remote controller cannot be used When the batteries of the remote controller run out or the remote control ler malfunctions the emergency operation can be done using the emer gency buttons on the grille DEFROST STAND BY lamp Operation lamp Emergency operation switch heating Emergency operation switch cooling seconds Lighting of the Operation lamp means the start of operation gt oc fao Note Details of emergency mode as shown below Receiver Starting operation co ap cd Peia the cooling mode press the 2 button for more than 2 To operate the heating mode press the button for more than 2 Operation mode Set temperature 24 75 F 24 C 75 F Fan speed High High Airflow direction Horizontal Downward 5
49. ontrol PCB O for both J41 and J42 Four pair number settings are supported The pair number settings of the wireless remote controller and indoor control PCB J41 J42 are given in the table on the left x in the table indicates the jumper line is disco nnected Pair number setting with IR wireless remote controller Model JP1 There is no jumper JP1 because these models Without TH5 have the cond eva temperature thermistor TH5 With 5 x Unit type setting Indoor controller board type setting Indoor controller board type For product Spare parts 27 10 SPECIAL FUNCTION 10 1 Rotation Function and back up function 2nd stage cut in function This function is only available when using wired remote controller 10 1 1 Operation 1 Rotation function and Back up function Outline of functions Main and sub units operate alternately according to the interval of rotation setting Main and sub unit should be set by refrigerant address Outdoor Dip switch setting Refrigerant address 00 gt Main unit Refrigerant address 01 gt Sub unit When error occurs to one unit another unit will start operation Back up function System constraint This function is available only by the grouping control system INDOOR UNIT OUTDOOR UNIT 1 1 of 2 refrigerant groups Refer to Fig 1
50. pen or short 24 9 6 1 Thermistor Thermistor Characteristic graph Thermistor for lower temperature Room temperature thermistor TH1 50 lower temperature Pipe temperature thermistor liquid TH2 Condenser evaporator temperature thermistor TH5 40 Thermistor Ro 15kQ 3 2 Fixed number of B 3480 296 9 30 1 1 Rt 1 480 t C Rt215exp 3480 2734 273 E o 1 1 220 1 3480 2 Pt 222 273 0C 32 F 15kQ 10 10 C 50 F 9 6kQ 20 C 68 F 6 3kQ 25C 77 F 5 4kQ 0 30C 86 F 4 3kQ 20 10 0 10 20 30 40 50 40 C 104 F 3 0kQ 4 14 32 50 68 86 104122 Temperature 9 6 2 DC Fan motor fan motor indoor controller circuit board Check method of DC fan motor fan motor indoor controller circuit board Notes High voltage is applied to the connecter for the fan motor Pay attention to the service 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 Y d Is there contact failure gt Yes gt Power supply check Remove the connector CNMF Measure the voltage in the indoor controller circuit board TEST POINT 0 between 1
51. r and remove the electrical cover 4 Remove 2 screws from the electrical box and pull the electrical box downward Temporarily secure the electrical box using 2 hooks in the back of electrical box 5 Disconnect the connectors on the indoor controller Electrical cover board Electrical cover fixing screws 4 x 8 ST Photo 2 Removing the electrical box _ 6 Disconnect the wires from the terminal blocks and pull out the electrical box See Photo 2 Removing the indoor controller board 6 Remove the 6 supports from the indoor controller board and remove the indoor controller board See Photo 3 D Electrical box Electrical box fixing screws Photo 3 Room temperature Indoor controller thermistor TH21 board Terminal blocks 4 TB5 OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS 3 Removing the room temperature thermistor TH1 1 Remove the air intake grille See Figure 1 2 2 Remove the beam by removing 1 screw 4 x 8 PT See Photo 1 3 Remove 2 screws from the electrical cover and remove the electrical cover 4 Remove 2 screws from the electrical box and pull the electrical box downward Temporarily secure the electrical box using 2 hooks in the back of electrical box 5 Disconnect the connector CN20 red from the indoor controller board 6 Remove the sensor holder from the electrical box and remove the thermistor from the holder Photo 4 Casing
52. ration of refrigerant oil etc Store the piping to be used indoors during installation and keep both ends of the piping sealed until just before brazing Leave elbow joints etc in their packaging Use the following tools specifically designed for use with R410A refrigerant If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor The following tools are necessary to use R410A refrigerant Tools for R410A Flare tool Size adjustment gauge Vacuum pump adaptor Electronic refrigerant charging scale Gauge manifold Charge hose Gas leak detector Torque wrench The refrigerant oil applied to flare and flange connections must be ester oil ether oil or alkylbenzene oil in a small amount Handle tools with care If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc Charge refrigerant from liquid phase of gas cylinder If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor If the refrigerant is charged from gas phase composition change may occur in refrigerant and the efficiency will be lowered 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
53. rence Back up heater 10 2 1 Operation Z Set temp Room temp ae output Outline of functions 25 25000 0 25000 back up heater signal is sent out according to the tempera T ture difference between indoor room temperature and set tem perature This function is available only in heating operation 3 EUN ns 2 ON 10 2 2 How to connect When connecting to the connector CN24 of the indoor unit use PAC SE56RA E optional parts 2 0 2 5 C 4 5 F 30 11 DISASSEMBLY PROCEDURE 24 4 4 Be careful when removing heavy parts 6 4 42 4 Photo 6 4 OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS 1 Removing the air intake grille Figure 1 1 Slide the air intake grille holding knobs at 2 or 3 loca tions to the rear to open the air intake grille See Figure 1 2 While the air intake grille left open push the stoppers on the rear hinges at 2 or 3 locations to pull out the air intake grille See Figure 2 Figure 2 Air intake grille gt Air intake grille holding knobs hinges e Pull out the air intake grille Beam fixing screw 2 Removing the indoor controller board and the electrical box Photo 1 4 x 8PT 1 Remove the air intake grille See Figure 1 2 2 Remove the beam by removing 1 screw 4 8 PT See Photo 1 3 Remove 2 screws from the electrical cove
54. roller board for servicing the function should be set again 1 Request Code List Rotation setting 513 Rotation ON Alternating interval 1day and back up function No 5 314 UE Rotation ON Alternating interval 5day and back up function Rotation Alternating interval 3day and back up function 315 Rotation ON Alternating interval 7day and back up function Rotation ON Alternating interval 14day and back up function Rotation ON Alternating interval 28day and back up function 2nd stage cut in setting Setting No Initial Request code Setting contents setting No 1 320 Cut in function OFF Monitoring the request code of current setting 1 No 3 822 Cut in Function ON Set point Set temp 4 C 7 5 F 325 Cut in Function ON Set point Set temp 6 C 10 8 F 324 Cut in Function ON Set point Set temp 8 C 14 4 F aM 29 2 Setting method of each function by wired remote controller a MITSUBISHI ELECTRIC B Refrigerant address amp AMEEN E C Data display area D Request code display area ES Ji TEMP CDON OFF 22 aN es 3 B TABOE OMENU hall N um 3868 CHEK ue GD GEN 5 21 A 7 CLEARN 3 1 Stop operat
55. rs Liquid pipe TH2 and con denser evaporator TH5 1 Remove the air intake grille See Figure 1 2 Remove the left and right side panels See Figure 3 Remove the under panel See Photo 14 Remove the drain pan See Photo 15 16 17 Disconnect the connector 44 white from the indoor controller board 6 Remove 6 screws from the pipe cover and remove the pipe cover See Photo 15 18 7 Remove the fastener for wires and remove the thermistors TH2 and TH5 from each holder See Photo 19 2 3 4 5 Photo 17 Pipe cover fixing Screws Pipe cover fixing screws See Photo 15 Photo 18 Condenser evaporator tepmertature thermistor TH5 Liquid pipe temperature thermistor 2 11 Removing the guide 1 Remove the intake grille See Figure 1 2 Remove the side panel right and left See Figure 3 Remove the under panel See Photo 13 2 3 4 Remove the drain See Photo 14 15 16 5 Remove the screw from the guide vane then remove the guide vane Photo 19 lt a Drain pan Guide vane 12 Removing the Auto vane 1 Remove the intake grille See Figure 1 2 2 Remove the right side panel See Figure 3 3 Remove the vane motor and cover See Photo 12 4 Slide the auto vane to the vane motor side 5 Remove 2 axes from each vane support pushing the vane support to the vane sleeve side 35 Photo 20 Vane sleeve V
56. se Symptom Wired remote controller LED 1 2 PCB in outdoor unit For about 2 After LED 1 2 are lighted LED 2 is For about 2 minutes following power on op PLEASE WAIT minutes after turned off then only LED 1 is eration of the remote controller is not possible power on lighted Correct operation due to system start up Correct operation PLEASE WAIT Error code Subsequent to about 2 minutes after power on Display messages do not appear even when operation switch is turned ON operation lamp does not light up Only LED 1 is lighted LED 1 2 blink Connector for the outdoor unit s protection device is not connected Reverse or open phase wiring for the outdoor units power terminal block L1 L2 GR Only LED 1 is lighted LED 1 blinks twice LED 2 blinks once Incorrect wiring between indoor and outdoor units incorrect polarity of 51 S2 S3 e Remote controller wire short On the IR wireless remote controller with condition above following phenomena take place No signals from the remote controller can be received OPE lamp is blinking The buzzer makes a short ping sound Note Operation is not possible for about 30 seconds after cancellation of function selection Correct operation For description of each LED LED1 2 3 provided on the indoor controller refer to the following table LED1 power for microprocessor always lit
57. t force on draw or bend the lead wire while measuring resistance value of thermis tor breaking of wire or contact failure can be detected Check contact failure of connector CN20 on the indoor controller board Refer to 9 7 Turn the power on again and check restart after inserting connector again Check room temperature display on remote controller Replace indoor controller board if there is abnormal difference with actual room temperature Turn the power off and on again to operate after check Pipe temperature thermistor Liquid TH2 The unit is 3 minute resume prevention mode if short open of thermistor is detected Abnormal if the unit does not reset normally after 3 min utes The unit returns to normal opera tion if it has been reset normally Constantly detected during cooling drying and heating except defrosting operation Short 90 C 194 F or more Open 40 C 40 F or less Defective thermistor characteristics Contact failure of connector 44 on the indoor controller board Insert failure Breaking of wire or contact failure of thermistor wiring Defective refrigerant circuit is causing thermistor tempera ture of 90 C 194 F or more 40 C 40 F or less Defective indoor controller board Check resistance value of thermistor For characteristics refer to P1 above Check contact failure of connector CN44 on the indoor control
58. ump during self diagnosing 2 Emergency operation becomes continuous only by switching the power source on off ON OFF on the remote control or temperature control etc does not function 3 Avoid operating for a long time when the outdoor unit begins defrosting while emergency operation of the heating is activated because it will start to blow cold air 4 Emergency cooling should be limited to 10 hours maximum The indoor unit heat exchanger may freeze 5 After emergency operation has been deactivated set the switches etc to their original positions 6 Movement of the vanes does not work in emergency operation therefore you have to slowly set them manually to the appropriate position 23 9 6 HOW CHECK THE PARTS PCA A24KA4 Parts name PCA A30KA4 PCA A36KA4 42 4 Check points Room temperature thermistor TH1 Liquid pipe thermistor TH2 Condenser evaporator temperature thermistor 5 Disconnect the connector then measure the resistance with a tester At the ambient temperature 50 F 86 F Abnormal Open or short Normal 4 3kQ 9 6kQ Refer to the next page for a detail Vane motor MV BO c Blue Yellow Measure the resistance between the terminals with a tester At the ambient temperature of 68 F 86 F Connector Normal Abnormal Red Yellow Red Blue Red Orange Red White 3000 Open or short Drain pump DP Option Y
59. when in timer operation or when setting timer 4 5 66 1 display Displays the order of timer operation Or 920 display Displays whether timer is on or off 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 SPECIFICATIONS INDOOR UNIT z 5 oc INDOOR UNIT Service Ref 24 4 Power supply phase cycle voltage 1 phase 60Hz 208 230V Max Fuse Size 15 Min Circuit Ampacity 1 External finish White Munsell 6 4Y 8 9 0 4 Heat exchanger Plate fin coil Fan Fan drive x No Sirocco fan direct x 3 Fan motor output kW 0 095 Fan motor F L A 0 54 Airflow Low Medium2 Medium1 High 3 Dry 15 16 17 19 530 565 600 670 Wet 14 15 16 18 495 530 565 635 External static pressure Pa

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