TECHNICAL & SERVICE MANUAL
Contents
1. SLZ KA50VAL TH SLZ KA50VA TH SLZ KASOVAL TH SLZ KABOVA TH GRILLE se 65 2 2 ina 52 TO OUTDOOR UNIT WHT EH x VLW ORN DP RED E la 1 2 gt 1121218087 ESL Woe 5 81 BRN F3 EIE EIE HE ja 88 pma La 5 El WHT 850 BLU RED ORN N W ANS IS 1 3 5 7 9 Fan 1 3 O HEATER 1 3 0 U m 1 3 1131 power 1 3 FAN CNC DIC CND BLU 9 f BLU CONTROL d Jens a ol FUSE CN3C m cj H x z DC13 1V U BZ U 5 PINK 219161 s 4 1 21 ONZSUWHT 1 LED 1 xejxsjxa want U 9963 O cola 1 5 SWE sw3 CN2D 12 jsw c LED3 O lt 80 1 gt swe nai O LED MODELS SW2 ON TII GRN LED2 ON s H VANE 2 PHASE INTAKE 25 Ent 12. lt 50Hz gt lt 50Hz gt SLZ KA25VAL TH NOTCH SPL dB LINE SLZ KA35VAL TH NOTCH SPL dB LINE SLZ KA25VA TH a eo SLZ KA35VA TH T SLZ KA25VAL TH edum 31 SLZ KA35VAL TH edum 33 SLZ KA25VA TH SLZ KA35VA TH 90 I 1 1 I 90 J 4 4 8 8 80 EK 5 70 70 m a e I e 5 60 E 5 60 u i fo 4 80 E 50 x t JNC 50 fofi ti 5 i E 40 5 j 8 AA Su 1 JNC 30 X f 5 i m lt 20 wid APPROXIMATE T E amp 20 APPROXIMATI b I TERESHOLD OF ar TERESHOLD OF HEARING FOR E i sk 1 o HEARING FOR T CONTINUOUS NC 20 CONTINUOUS T NOISE I NOISE I 10 T T T n 10 T T T T 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 lt 50Hz gt SLZ KA50VAL TH NOTCH JsPL aB I LINE SLZ KA50VA TH con 2 SLZ KASOVAL TH edum 34 SLZ KA50VA TH 90 1 1 UNIT 2 80 N 8 CEILING 70 8 QULA ta 5 60 gt u 50 1 5 gt eo eo 40 O 5 MICROPHONE o 9 30 lt m ir y i 3 amp 20 APPROXIMATE
3. RoHS 12 095 350 INDOOR CAPACITOR 1 5 440VAC 35 C1 FUNCTIONAL PARTS SLZ KA25VAL TH SLZ KA35VAL TH SLZ KASOVAL TH SLZ KA25VA TH SLZ KA35VA TH SLZ KASOVA TH SLZ KA25VAL1 TH SLZ KA35VAL1 TH SLZ KA50VAL1 TH SLZ KA25VA1 TH SLZ KA35VA TH SLZ KA50VA TH Parts No Parts name Specification 2 Remarks Drawing No Wiring Diagram Symbol E17 104 290 BASE E17 104 124 DRUM 1 E17 104 808 LEG 1 E17 105 124 DRUM 2 E17 140 620 INDOOR HEAT EXCHANGER E17 141 620 INDOOR HEAT EXCHANGER E17 142 620 INDOOR HEAT EXCHANGER E17 104 105 MOTOR MOUNT 3PCS SET E17 162 300 INDOOR FAN MOTOR PK6V15 LD E17 164 300 INDOOR FAN MOTOR PK6V20 LL E17 166 300 INDOOR FAN MOTOR PK6V20 LM E17 104 816 FLAT PLATE E17 104 502 TURBO FAN E17 104 097 SPL WASHER E17 104 700 DRAIN PAN E17 154 308 ROOM TEMPERATURE THERMISTOR E17 104 520 FAN GUARD E17 104 524 DRAIN PLUG E17 104 648 COIL SUPPORT E17 154 309 CONDENSER EVAPORATOR TEMPERATURE THERMISTOR E17 154 307 PIPE TEMPERATURE THER
4. operation O Wired remote controller 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 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 Shows the operating mode etc Multilanguage display is available Centrally Controlled indicator Indicates that operation from the remote controller has been prohib ited by a master controller Timer is Off indicator S KA MITSUBISHI ELECTRIC TIME SUN MON TUE WED THU FRI SAT DIED ON AFTER LIL 7 PILI ALTER OFF ERROR CODE LEE AAAS FILTER E FC EC qa Fal TU WEEKLY 4 gt 38 Sensor indication Displayed when the remote controller sensor is used Locked indicator Indicates that remote controller but tons have been locked Clean The Filter indicator To be displayed on when it is time to clean the filter Timer indicators i
5. T TO burbooR Remarks Drawing No Wiring Diagram Symbol 006 382 FUSE 250V 6 3A 1 1 1 1 1 FUSE 661 385 VARISTOR 1 1 1 1 1 ZNR 162 447 INDOOR CONTROLLER BOARD 1 164 447 INDOOR CONTROLLER BOARD 166 447 INDOOR CONTROLLER BOARD 162 375 TERMINAL BLOCK 3 51 52 53 TB4 156 375 TERMINAL BLOCK 2P 1 2 TB15 154 440 INDOOR POWER BOARD P B 095 350 INDOOR FAN CAPACITOR 1 5uF 440VAC 31 C1 FUNCTIONAL PARTS SLZ KA25VAL TH SLZ KA35VAL TH SLZ KASOVAL TH SLZ KA25VA TH SLZ KA35VA TH SLZ KA50VA TH Parts No Parts name Specification Remarks Drawing No Wiring Diagram Symbol E07 104 290 BASE E07 104 124 DRUM 1 E07 104 808 LEG 1 105 124 DRUM 2 E07 140 620 INDOOR HEAT EXCHANGER E07 141 620 INDOOR HEAT EXCHANGER E07 142 620 INDOOR HEAT EXCHANGER 104 105 MOTOR MOUNT 3PCS SET E07 162 300 INDOOR FAN MOTOR PK6V15 LD E07 164 300 INDOOR FAN MOTOR PK6V20 LL E07 166 300 INDOOR FAN MOTOR PK6V20 LM 104 816 FLAT PLATE 104 502 TURBO FAN 104 097
6. The indicator comes on if the corre sponding timer is set Fan Speed indicator Shows the selected fan speed Up Down Air Direction indica tor Room Temperature display Indicates that the timer is off Temperature Setting Shows the target temperature Shows the direction of the outcoming airflow One Hour Only indicator Shows the room temperature The room temperature display range is 8 39 C The display blinks if the temperature is less than 8C or 39 C or more Ventilation indicator Appears when the unit is running in Ventilation mode Displayed if the airflow is set to low or downward during COOL or DRY mode Operation varies according to model The indicator goes off in one hour when the airflow direction also changes Louver display Indicates the action of the swing louver Does not appear if the louver is not running 6 Power On indicator Indicates that the power is on Note O 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 O 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 operat
7. O RESET Installation area Area in which the remote controller is not exposed to direct sunshine Area in which there 15 no heating source nearby Area in which the remote controller is not exposed to cold or hot winds Area in which the remote controller can be operated easily Area in which the remote controller is beyond the reach of children Installation method O Attach the remote controller holder to the desired location using 2 tapping screws Insert the lower end of the controller into the holder A Wireless remote controller Accessory Wall Remote controller holder Accessory O Fixing screw Accessory The signal can travel up to approximately 7 meters in a straight line within 45 degrees to both right and left of the center line of the receiver In addition the signal may not be received if there is interference of light of fluorescent lights or strong sunlight WIRED REMOTE CONTROLLER MITSUBISHI ELECTRIC TEMP CD ON OFF o C Unit mm 5 WIRING DIAGRAM SLZ KA25VAL TH SLZ KA25VA TH SLZ KA35VAL TH SLZ KA35VA TH SLZ KA25VAL1 TH SLZ KA25VA TH SLZ KA35VAL1 TH SLZ KA35VA TH
8. 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 Wireless remote controller Wired remote controller Beeper sounds OPERATION ta Remark INDICATOR lamp blinks Check code ymp Number of times 1 E9 Indoor outdoor unit communication error Transmitting error Outdoor unit 2 UP Compressor overcurrent interruption 3 U3 U4 Open short of outdoor unit thermistors For details check 4 UF Compressor overcurrent interruption When compressor locked the LED display 5 U2 Abnormal high discharging temperature 49C worked of the outdoor insufficient refrigerant controller board 6 1 Abnormal high pressure 63H worked Overheating As tor outdoor protection operation unit refer to 7 U5 Abnormal temperature of heatsink Serice manual 8 U8 Outdoor unit fan protection stop 0322 or 9 U6 Compressor overcurrent interruption Abnormal of power module 0C323 10 U7 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
9. Operation 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 microcomputer Indicates whether control power is supplied Make sure that this LED is always lit LED2 power for remote controller Indicates whether power is supplied to the remote controller This LED lights only in the case of the indoor unit which is connected to the outdoor unit refrigerant address 0 LED3 communication between indoor and outdoor units Indicates state of communication between the indoor and outdoor units Make sure that this LED 1 always blinking 15 7 3 SELF DIAGNOSIS ACTION TABLE Error Code Abnormal point and detection method Cause Note Refer to the manual of outdoor unit for the details of display such as F U and other E Countermeasure Room temperature thermistor TH1 O The unit is in 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 or more Open 40 C or less Q Defective thermistor characteri
10. Standard of Level 30 Downward 45 Downward 55 O 70 horizontal position Min Dimension A mm 21 25 28 30 Dimension between 21 mm and 30 mm can be arbitrarily set Caution Do not set the dimension out of the range A Erroneous setting could cause dew drips smudge on ceiling or malfunction of unit 26 9 DISASSEMBLY PROCEDURE SLZ KA25VAL TH SLZ KA25VA TH SLZ KA25VAL 1 TH SLZ KA25VA1 TH SLZ KA35VAL TH SLZ KA35VA TH SLZ KA35VAL 1 TH SLZ KA35VA1 TH SLZ KASOVAL TH SLZ KASOVA TH SLZ KA50VAL 1 TH SLZ KA50VA 1 TH Be careful on removing heavy parts OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS 1 Removing the air intake grille Figure 1 1 Slide the knob of air intake grille to the direction of the arrow to open the air intake grille Air intake grille 2 Remove the string hook from the panel to prevent the grille from dropping 3 Slide the hinge of the intake grille to the direction of the arrow and remove the air intake grille Air intake grille knob 2 Removing the fan guard 1 Open the air intake grille 2 Remove the 3 screws of fan guard Fan guard 3 Removing the panel 1 Remove the air intake grille Refer to 1 Corner panel See figure 2 1 Remove the screw of the corner 2 Slide the corner panel to the direction of the arrow G and remove the corner panel Panel See photo 2 1 Disconnect the connector that connects with the
11. Changes for the Better MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS July 2007 No OC320 REVISED EDITION B TECHNICAL 8 SERVICE MANUAL Series SLZ Ceiling Cassettes R410A Revision SLZ KA25 35 50VA L 1 TH are added in REVISED Indoor unit EDITION B Model names Service Ref rac oe have SLZ KA25VA SLZ KA25VA TH SLZ KA25VA TH Please void 06320 REVISED SLZ KA35VA SLZ KA35VA TH SLZ KA35VA TH iud manual describes only SLZ KA50VA SLZ KA50VA TH service data of the indoor SALT door units please refer io SLZ KA25VAL 25 the service manual SLZ KA25VAL TH mm SLZ KASSVAL SLZ KA35VAL TH hate 235 freon thal For sera SLZ KA50VAL SLZ KA50VAL TH compliant SLZ KA50VAL TH to the RoHS Parts List CONTENTS 1 TECHNICAL CHANGES 2 2 PART NAMES AND FUNCTIONS 3 3 SPECIFICATIONS s 6 4 OUTLINES AND DIMENSIONS 8 Mods 56 5 WIRING DIAGRAM 11 dadi 6 REFRIGERANT SYSTEM DIAGRAM 12 7 TROUBLESHOOTING 13 8 4 WAY AIR FLOW SYSTEM 25 ana 9 DISASSEMBLY PROCEDURE 27 10 PARTS LIST ce conocieran es 30 Ge 11 RoHS PARTS 34 SLZ KA25 35 50VAL TH SLZ KA25 35 50VA TH TM SLZ KA25 35 50VAL1 TH SLZ KA25 35 50VA1 TH REMOTE
12. SPL WASHER 104 700 DRAIN PAN 154 308 ROOM TEMPERATURE THERMISTOR 104 520 FAN GUARD 104 524 DRAIN PLUG 104 648 COIL SUPPORT 154 309 CONDENSER EVAPORATOR TEMPERATURE THERMISTOR 154 307 PIPE TEMPERATURE THERMISTOR LIQUID 104 702 DRAIN HOSE 104 266 DRAIN SENSOR 104 241 SENSOR HOLDER 104 355 DRAIN PUMP 104 809 LEG 2 154 006 COVER DRUM N l l A A A l A A A A A 140 426 WIRELESS REMOTE CONTROLLER 527 083 REMOTE CONTROLLER HOLDER EII A A lt lt lt lt N lt lt lt lt 159 426 REMOTE CONTROLLER 018 089 REMOTE CONTROLLER CABLE 33 11 RoHS PARTS LIST PANEL PARTS SLP 2AL FOR SLZ KA25 35 50VAL TH SLP 2AA FOR SLZ KA25 35 50VA TH SLP 2ALW FOR SLZ KA25 35 50VAL TH SLP 2AAW FOR SLZ KA25 35 50VA TH Q ty set Parts No Parts name Specification SLP 2 Wiring Diagram Symbol Remarks Drawing No ALW E17 103 003 AIR OUTLET GRILLE
13. Connect to the indoor controller board CNDk between to 220 240V AC 21 7 5 2 Indoor controller board SLZ KA25VAL TH SLZ KA25VA TH SLZ KA25VAL1 TH SLZ KA35VAL TH SLZ KA35VA TH SLZ KA35VAL1 TH SLZ KASOVAL TH SLZ KASOVA TH SLZ KA50VAL1 TH CN2D Connector to the indoor power board CN2S 12 5 13 7V DC CN3C Transmission Indoor outdoor Power supply LED2 8 Power supply R B 0 24V DC CND Power supply input 220 240 Connect to the indoor power board CNSK 220 240 Dew prevention heater H2 220 240V AC R1138 ro TEE CNP Drain pump output DP 220 240V AC FAN Fan motor output Mode selection Emergency operation 22 o 000000000 3 O 2 o SLZ KA25VA TH SLZ KA35VA TH SLZ KA50VA TH LED3 Transmission Indoor outdoor CN22 Remote controller connecting wire D f 10 4 14 6V DC a CN20 Room temperature thermistor TH1 CN21 Pipe temperature thermistor Liquid TH2 CN29 Condenser evaporator temperature thermistor TH5 CN31 Drain sensor DS Connect to the wireless remote controller board CNB CN41 Connector HA terminal A CN6V Vane motor output MV CN51 Centrally control CN2L Connector LOSSNAY Jumper connector 11 15 Unit setting Capacity setting 7 6 TROUBLE CRITERION OF MAIN PARTS
14. E17 158 003 AIR OUTLET GRILLE E17 423 003 AIR OUTLET GRILLE E17 424 003 AIR OUTLET GRILLE E17 103 317 WIRELSS REMOTE CONTROL BOARD E17 103 037 AUTO VANE E17 423 037 AUTO VANE E17 103 975 CORNER PANEL E17 423 975 CORNER PANEL E17 103 100 AIR FILTER E17 103 010 INTAKE GRILLE E17 423 010 INTAKE GRILLE E17 103 303 VANE MOTOR E17 103 044 BUSH E17 103 031 GEAR V E17 103 032 GEAR 0 0 0 0 Oo Oo O O O RoHS 34 ELECTRICAL PARTS SLZ KA25VAL TH SLZ KA25VA TH SLZ KA25VAL TH SLZ KA35VAL TH SLZ KA35VA TH SLZ KA35VAL1 TH SLZ KASOVAL TH SLZ KASOVA TH SLZ KAS50VAL 1 TH Parts No Parts name Specification Q tv set SLZ KA25VA1 TH SLZ KA35VA TH SLZ KA50VA TH SLZ KA 25 35 50 25 35 50 La TH VAq TH Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty E17 006 382 FUSE 250V 6 3A 1 1 111 1 FUSE E12 661 385 VARISTOR 1 1 111 1 ZNR E17 162 44 INDOOR CONTROLLER BOARD 1 LB E17 164 44 INDOOR CONTROLLER BOARD LB E17 166 44 INDOOR CONTROLLER BOARD LB E17 162 375 TERMINAL BLOCK 3P S1 S2 S3 TB4 E17 156 375 TERMINAL BLOCK 2P 1 2 TB15 E17 154 440 INDOOR POWER BOARD P B
15. SLZ KA25VAL TH SLZ KA25VA TH SLZ KA25VAL1 TH SLZ KA25VA1 TH SLZ KA35VAL TH SLZ KA35VA TH SLZ KA35VAL1 TH SLZ KA35VA1 TH SLZ KASOVAL TH SLZ KASOVA TH SLZ KASOVAL TH SLZ KA50VA TH Part name Check method and criterion Room temperature thermistor TH1 Pipe temperature thermistor liquid TH2 Condenser evaporator temperature thermistor 5 Measure the resistance with a tester Part temperature 10 30 Normal Abnormal 4 3kQ 9 6kQ Opened or short circuited Indoor fan motor Thermal fuse 141 3 C Measure the resistance between the terminals with a tester Coil wiring temperature 10 C 30 C Normal KA35VA L Abnormal KA25VA L Eos WHT BLK 386 4280 373 4130 308 3410 BLK BLU 81 910 155 1720 135 1510 BLU YLW 28 320 44 490 44 490 BRN RED 157 1740 302 3350 293 3240 KASOVA L Opened or short circuited Vane motor MV Blue Yellow Measure the resistance between the terminals with a tester At the ambient temperature 20 C 30 C Connector Normal Red Yellow Red Blue Red Orange Red White Abnormal Open or short Drain pump DP Yellow 4 2 Ye llow Measure the resistance between the terminals with a tester At the ambient temperature 20 C 30 Normal Abnormal 2900 Open or short Drain sensor DS WD Measure the resistance between the termin
16. Sound level High Medium Low 37 31 28 38 33 29 39 34 30 Fan speed High Medium Low 650 530 480 690 570 510 710 590 530 Fan speed regulator 3 3 3 Thermistor TH1 at25 C 10 10 10 Thermistor TH2 at25 C 10 10 10 Thermistor TH5 at25 C 10 NOTE Test conditions are based on ISO 5151 Specifications and rating conditions of main electric parts Cooling Indoor 27C W B 19 C Outdoor 35 C W B 24 C Heating Indoor 20C W B 15 Outdoor 7C W B 6C Refrigerant piping length one way 5m 1 Measured under rated operating frequency INDOOR UNIT 10 10 Service ref SLZ KA25VAL y TH SLZ KA35VAL TH SLZ KA50VAL 1 TH Item SLZ KA25VA TH SLZ KA35VAq TH SLZ KA50VA TH Indoor fan capacitor C1 1 5uF 440V Fuse FUSE 250V 6 3A Vane motor MV MSBPC20 12V 2500 Terminal block TO OUTDOOR UNIT TO WIRED REMOTE CONTROLLER 2P SLZ KA25 35 50VA Indoor fan motor thermal fuse 141 C 3 C Cord Heater H2 240V AC 15W NOISE CRITERION CURVES
17. TERESHOLD OF o HEARING FOR CONTINUOUS NOISE 1 I L 10 1 F 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz NOTE The sound level is measured in an anechoic room where echoes are few when compressor stops The sound may be bigger than the indicated level in actual use due to surrounding echoes The sound level can be high er by about 2 dB than the indicated level during cooling and heating operation OUTLINES AND DIMENSIONS 4 Unit mm TH SLZ KA25VAL SLZ KA35VAL TH you 2 1 you pare uonoeuuoo parey 094218 9 you 8 5 you y 1 uonoeuuoo uonoeuuoo vAsev z1is 25 6 9 you 8 5 you 3 uonoeuuoo 6859 6 VVASTVNHZIS 25 6 9 seb pinbi edid juejeDujeu edid SJ9POW SLZ KASOVAL TH SLZ KA25VA TH SLZ KA35VA TH SLZ KASOVA TH SLZ KA25VAL1 TH SLZ KA35VAL1 TH SLZ KA50VAL1 TH SLZ KA25VA TH SLZ KA35VA TH SLZ KA50VA TH yoq uoisuedsng 8 10 OLW ka ejou Jv LLE 95 68 Ke r 1
18. WN l Y gt gt 2 lu e o BIN o FIN gt jo 8 8 Na PIN gt TIT lt x 1 WN g alo 2 9JOU Japo oo pueig Ny 10 29 3 059 K 3 8 8 49104 03 pa O SL Qs i eoeyns 8 92 jj euwe 3 Rlo 91 5 Ajjeooj eunooud 2 ze q O 0859 03 GZ dA edid ajoy 9 029 976 955 zx a aja 1 DOJN a i 4 E 0 5 bs 5 2 3 gt 4 Qin 25 SIS l g S upud 2 yoquolsuedsns fel 2 Lp 3 o y 4 exe 59214 1 a U Buyoo9 yayms 11 1 2 d ja A8 18 1808330 uonejedo 883 V eoeyns ullao ajoy ez 00 ajoy no Sc US91 jo Duiweip WIRELESS REMOTE CONTROLLER Unit mm 140 a MITSUBISHI ELECTRIC SELECT AUTO COOL mie EB VANE TIME MODE
19. controller board 2 Drive the relay after connecting the 12V DC relay between the Yellow and Orange connector wires Use a relay of 1W or smaller MB Electromagnetic switch power relay for duct fan X Auxiliary relay 12V DC LY 1F Be sure to secure insulation material by tape etc CN51 5 Green indoor unit lt x board 1 E S MB Connector 5P p i n Brown al Indoor unit side E Installation at site Multiple remote sk controller adapter Be sure to secure insulation PAC SA88HA E material by tape etc Indoor controller board o o oo o Foe Multiple remote controller adapter LT Distance between indoor PAC SA88HA E 0 1 controller board and relay must be within 10m 8 4 FIXING HORIZONTAL VANE Horizontal vane of each air outlet can be fixed according to the environment where it is installed Setting procedure 1 Turn off a main power supply Turn off a breaker 2 Remove the vane motor connector in the direction of the arrow shown below with pressing the unlocking button as in the figure below Insulate the disconnected connector with the plastic tape Vane motor Connector Untocking button Horizontal vane 3 Set the vertical vane of the air outlet by hand slowly within the range in the table below Measured standard position of the grille 4 A Horizontal vane lt Set range gt
20. outdoor controller circuit board If pipe lt condenser evaporator gt temperature is extremely low in cooling mode or high in heating mode refrigerant circuit may have defect Operate in test run mode and check pipe lt condenser 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 Remote controller transmission error E0 signal receiving error E4 O 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 Abnormal if sub remote controller could not receive for any signal for 2 minutes Error code EO O Abnormal if indoor controller board can O Contact failure at transmission wire of remote controller All 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 9 Miswiring of remote controller Defective transmitting receiving circuit of remote controller O Check disconnection or loo
21. remove the piping cover See photo 9 7 Remove the pipe temperature thermistor liquid and condenser evaporator temperature thermistor Refer to 7 8 Disconnect the lead wires to the direction of the fan motor 9 Remove the 1 coil support screw the 2 inside coil screws See photo 10 and the 4 outside coil screws See photo 9 Le from the heat exchanger and remove the heat exchanger Piping cover Lead wires Control box Photo 10 Coil screws Coil support support Heat exchanger 29 10 PARTS LIST Non RoHS compliant PANEL PARTS SLP 2AL FOR SLZ KA25 35 50VAL TH SLP 2AA FOR SLZ KA25 35 50VA TH Y Q ty set Remarks Wiring Parts No Parts name Specification A Diagram Drawing No Symbol SLP 2AL SLP 2AA E07 103 AIR OUTLET GRILLE 1 E07 158 AIR OUTLET GRILLE E07 103 WIRELSS REMOTE CONTROL BOARD E07 103 AUTO VANE 103 CORNER PANEL E07 103 AIR FILTER E07 103 INTAKE GRILLE E07 103 VANE MOTOR 103 VANE BUSH E07 103 GEAR V 103 GEAR M 1 6 gt gt 5 5 30 ELECTRICAL PARTS SLZ KA25VAL TH SLZ KA25VA TH SLZ KA35VAL TH SLZ KA35VA TH SLZ KASOVAL TH SLZ KA50VA TH Parts No Parts name Specification Q ty set SLZ KA 35 50 25 35 50 AL TH
22. CN29 _ CN20 rm MES WS 2 3 4 5 6 WIRELESS ORAN 112 1 2 1010 IREMO ONJI KA35 A CN32 51 CN41 mi WHT 1 CN31 l 12345 a 58 1 2 3 12 mk l SE i V 1 12345 CONTROLLER i LISTA 11915 2 2 2 8 8 W R UI I f Case of wired model See 80 1 lo 1 I 9 cis NEVINE MEN EJ Ox fr Re TB15 Q TOMA REMOTE i i CONTROLLER DS TH5 THI TH2 DC8 7 13V e ENT Case of wireress model LEGEND SYMBOL NAME SYMBOL NAME P B INDOOR POWER BOARD W B WIRELESS REMOTE CONTROLLER BOARD LB INDOOR CONTROLLER BOARD RECEIVING UNIT CN2L CONNECTOR LOSSNAY BUZZER CN32 CONNECTOR REMOTE SWITCH LED RUN INDICATOR CN41 CONNECTOR HA TERMINAL A LED HOT ADJUST CN51 CENTRALLY CONTROL SWITCH HEATING ON OFF FUSE FUSE T6 3AL250V SWITCH COOLING ON OFF LEDI POWER SUPPLY I B C1 CAPACITOR FAN MOTOR LED2 POWER SUPPLY I B DP DRAIN PUMP LED3 TRANSMISSION INDOOR OUTDOOR DS DRAIN SENSOR sw2 SWITCH CAPACITY CODE H2 DEW PREVENTION HEATER SW3 SWITCH MODE SELECTION MF FAN MOTOR SWE SWITCH EMERGENCY OPERATION VANE MOTOR 1 DRAIN PUMP DEW PREVENTION TB4 TERMINAL BLOCK INDOOR OUTDOOR CONNECTING LINE X4 RELAY FAN MOTO
23. CONTROLLER 1 TECHNICAL CHANGES SLZ KA25VAL TH SLZ KA25VAL TH SLZ KA35VAL TH SLZ KA35VAL TH SLZ KA50VAL TH SLZ KASOVAL TH SLZ KA25VA TH SLZ KA25VA TH SLZ KA35VA TH SLZ KA35VA1 TH SLZ KA50VA TH SLZ KA50VA TH PANEL has been changed SLP 2AL gt SLP 2ALW SLP 2AA gt SLP 2AAW White 0 70Y 8 59 0 97 gt Pure white 6 4Y 8 9 0 4 2 PART NAMES AND FUNCTIONS Indoor Unit SLZ KA25VAL TH SLZ KA25VA TH SLZ KA25VAL1 TH SLZ KA25VA TH SLZ KA35VAL TH SLZ KA35VA TH SLZ KA35VAL1 TH SLZ KA35VA1 TH SLZ KA50VAL TH SLZ KA50VA TH SLZ KA50VAL TH SLZ KA50VA TH Filter Removes dust and pollutants from inhaled air Horizontal Air Outlet Sets horizontal airflow automatically during cooling or dehumidifying Grille Auto Air Swing Vane Disperses airflow up and of airflow direction Air Intake Inhales air from room Wireless remote comtroller l a MITSUBISHI ELECTRIC SLZ KA50VAL TH SETTING button SLZ KA25VAL TH To set any desired room SLZ KA35VAL TH SLZ KASOVAL TH ON OFF button To start and to stop operation TIMER SELECT button To set time to start or stop unit operation 1 HEAT DRY FAN SPEED button To set fan speed to Low Medium or High MODE SELECT button To change the operation mode Auto Cooling He
24. and b are satisfied while the above men tioned detection is performed The drain sensor detects to be soaked in the water 10 times in a row b The intake temperature subtracted with liquid pipe temperature is detected to be less than 10 for a total of 30 minutes When the drain sensor detects to be NOT soaked in the water the detection record of a and b will be cleared G The drain sensor detection is performed in operations other than cooling When the unit stops operating during heating or fan operation when the unit stops because of some abnormality 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 drain sensor side heater Contact failure of drain sensor connector Dew condensation on drain sensor Drain water trickles along lead wire Drain water waving due to filter clogging Extension piping connection difference at twin triple quadruple system Miswiring of indoor outdoor connecting at twin triple quadruple system Room temperature thermistor liquid pipe temperature thermis tor detection is defective 19 OCheck the drain pump Performance Please check whether water can be drained Check the resistance of the drain sensor Side heater Check the connector contact failure 6 Check the d
25. there are no error records 2 If the beeper sounds 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 continued to the next page 14 On wireless remote controller The continuous buzzer sounds from receiving section of indoor unit Blink of operation lamp On wired remote controller Check code displayed on the LCD e If the unit cannot be operated properly after the test run refer to the following table to find out the cause after power on No messages appear even when operation switch is turned ON operation lamp does not light up Symptom Wired remote controller gause e For about 2 minutes after power on operation of the PLEASE WAIT For about 2 minutes after power on remote controller is not possible due to system start up Correct operation p for the outdoor unit s protection device is not connected PLEASE WAIT Error code Subsequent to about 2 minutes Reverse or open phase wiring for the outdoor unit s power terminal block Incorrect wiring between indoor and outdoor units incorrect polarity of S1 S2 S3 Remote controller wire short On the wireless remote controller with condition above following phenomena take place No signals from the remote controller can be received
26. unit 2 Remove the 2 screws from the panel and loose another 2 screws which are fixed to the oval hole have different diameter 8 Rotate the panel a little to remove the screws Slide the panel so that the screw comes to a larger diameter of the oval hole which has 2 different diameters i DANN Figure 2 Corner Screw panel Panel Corner panel 4 Removing the electrical parts Photo 3 1 Remove the 2 screws and the control box cover lt Electrical parts in the control box gt Indoor power board P B Indoor controller board I B Terminal block TB4 Indoor power board P B Indoor controller board Terminal block 8 TB4 27 OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS 5 Removing the room temperature thermistor TH1 Photo 4 1 Remove the panel Refer to 3 2 Pull out the room temperature thermistor from the drain pan Control box Drain plug 3 Remove the 2 screws fixed to the control box cover and remove the control box cover Scre 4 Remove the connector CN20 from the indoor controller board and disconnect the room temperature thermistor Room temperature thermistor TH1 Connectors 6 Removing the drain pan S 1 Remove the panel Refer to 3 2 Remove the room temperature thermistor and the 2 lead wires held with fastener wireless controller board relay Screw connector 9P red and panel relay connector 10P white 4 3
27. 7 Remove the 6 screws fixed to the flat plate and remove the flat plate 8 Disconnect the lead wires to the direction of the fan motor and remove the 3 nuts of the fan motor Photo 6 Flat plate Screw Screws 28 OPERATING PROCEDURE PHOTOS amp ILLUSTRATIONS 9 Removing the drain pump DP and drain sensor DS Photo 7 1 Remove the panel Refer to 3 2 Remove the drain pan Refer to 6 3 Remove the 2 screws fixed to the control box cover and Bona remove the control box cover Por As 4 Remove the connectors of the CNP and the CN31 from the indoor controller board 5 Remove the 1 screw fixed to the cover and remove the cover 6 Disconnect the lead wires to the direction of the drain pump See photo 7 7 Remove the 3 screws of the drain pump Photo 8 8 Cut the drain hose band pull out the drain hose from the drain pump 9 Pull out the drain pump 10 Remove the drain sensor and the holder Screw Cover Screw Fixing band Control box 10 Removing the heat exchanger 1 Remove the panel Refer to 3 Photos 2 Remove the drain pan Refer to 6 Screws of 3 Remove the nut and the washer from the turbo fan and piping cover remove the turbo fan 4 Remove the 2 screws fixed to the control box cover and remove the control box cover 5 Disconnect the connector of the fan from the indoor con troller board 6 Remove the 3 screws fixed to the piping cover and
28. MISTOR LIQUID E17 104 702 DRAIN HOSE E17 104 266 DRAIN SENSOR E17 104 241 SENSOR HOLDER E17 104 355 DRAIN PUMP E17 104 809 LEG 2 E17 154 006 COVER DRUM A 3 A l foo odo foo oo u N 5 A A odo E17 140 426 WIRELESS REMOTE CONTROLLER E12 527 083 REMOTE CONTROLLER HOLDER oo odo old lo N 4 4 N E17 159 426 REMOTE CONTROLLER 020690 0210202210 2 0210202002 0 0 20 2 2 RoHS E17 018 089 REMOTE CONTROLLER CABLE 37 38 39 Mr SUM s MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Jul 2007 No OC320 REVISED EDITION B PDF 7 Distributed in Sep 2006 No OC320 REVISED EDITION A PDF 7 New publication effective Jul 2007 Distributed in Feb 2005 No OC320 PDF 8 Specifications subjec
29. R LL 1815 TERMINAL BLOCK REMOTE CONTROLLER 5 RELAY FAN MOTOR Lo TRANSMISSION LINE X6 RELAY FAN MOTOR Hi ROOM TEMP THERMISTOR X7 RELAY FAN MOTOR Me 0 C 15kQ 25 C 5 4kQ DETECT ZNR VARISTOR THe PIPE TEMP THERMISTOR LIQUID 0 C 15kQ 25 C 5 4kQ DETECT THS COND EVA TEMP THERMISTOR 0 C 15kQ 25 C 5 4kQ DETECT NOTES 1 Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing 2 3 Indoor and outdoor connecting wires have polarities make sure to match terminal numbers S1 S2 S3 for correct wiring Symbols used in wiring diagram above are LLI Connector Terminal block x For details on how to operate self diagnosis refer to the technical manuals etc 11 6 REFRIGERANT SYSTEM DIAGRAM SLZ KA25VAL TH SLZ KA25VA TH SLZ KA25VAL1 TH SLZ KA25VA1 TH SLZ KA35VAL TH SLZ KA35VA TH SLZ KA35VAL1 TH SLZ KA35VA TH SLZ KASOVAL TH SLZ KASOVA TH SLZ KA50VAL1 TH SLZ KA50VA TH Strainer 50 Heat exchanger Refrigerant GAS pipe connection Flare Condenser evaporator temperature thermistor TH5 Refrigerant flow in cooling Refrigerant flow in heating Flare Pipe temperature Room temperature thermistor liguid thermistor TH1 NU Distributor al with strainer 50 Refrigerant LIQUID pipe connection 7 TROUBLESHOOTING 7 1 CAUTIONS ON TROUBLESHOOTING 1 Be
30. Remove the 4 screws fixed to the pan and remove the drain pan 4 Remove the fan guard Refer to 2 Removing the pipe temperature thermistor liquid TH2 and condenser evaporator temperature thermistor TH5 1 Remove the panel Refer to 3 2 Remove the drain pan Refer to 6 3 Disconnect the indoor coil thermistor from the holder 4 Remove the 3 screws fixed to the piping cover and remove the piping cover See photo 9 5 Remove the 2 screws fixed to the control box cover and remove the control box cover Pipe temperature thermistor liquid TH2 6 Remove the connector CN21 from the indoor controller board and disconnect the pipe temperature thermistor liquid Condenser evaporator temperature thermistor TH5 6 Remove the connector CN29 from the indoor controller board and disconnect the condenser evaporator temperature thermistor Pipe temperature thermistor liquid Condenser evaporator TH2 temperature thermistor TH5 Removing the fan motor MF 1 Remove the panel Refer to 3 2 Remove the drain pan Refer to 6 3 Remove the nut and the washer from the turbo fan and remove the turbo fan 4 Remove the 2 screws fixed to the control box cover and remove the control box cover 5 Disconnect the connectors of the fan 1 and the fan 2 from the indoor controller board 6 Remove the 3 screws fixed to the piping cover and remove the piping cover See photo 9
31. als with a tester Measure the resistance after 3 minutes have passed since the power supply was intercepted At the ambient temperature 0 C 60 Normal Abnormal 0 6kQ 6 0kQ Open or short Refer to the next page for a detail 23 lt Thermistor Characteristic graph gt Thermistor for Room temperature thermistor TH1 lt Thermistor for lower temperature gt lower temperature Pipe temperature thermistor liquid TH2 Condenser evaporator temperature thermistor TH5 Thermistor Ro 15kQ 3 Fixed number of B 3480 2 Rt 15exp 3480 1 2734 273 Resistance kQ OC 15kQ 10 C 9 6kQ 20 C 6 3kQ 25 C 5 2kQ 30 C 4 3kQ 40 C 3 0kO 20 10 0 10 20 30 40 50 Temperature Thermistor for drain sensor Thermistor for drain sensor Thermistor Ro 6 0kQ 5 Fixed number of B 3390 2 Rt 6exp 3390 1___1_ 273 t 273 OC 6 0kQ 10 C 3 9kO 20 C 2 6kQ 25 C 2 2k0 30 C 1 8kQ 40 C 1 3kQ 60 C 0 6kQ Resistance kQ 20 0 20 40 60 80 Temperature 24 8 4 WAY AIR FLOW SYSTEM 8 1 FRESH AIR INTAKE LOCATION FOR INSTALLATION At the time of installation use the duct holes cut out located at the positions shown in following diagram as and when required Fresh air intake Electrical Box Refrigerant pipe Drain pipe Detail drawing of fresh air intake 100 3 92 8 hole 25 73 4 Ceili
32. ating and Drying SLZ O RESET VANE CONTROL button To change the airflow direction Avoid pushing buttons with fingernails and other sharp objects Sharp objects may damage remote controller 3 down and adjusts the angle O Wired remote controller Once the controllers are set the same operation mode can be repeated by simply pressing the ON OFF button SLZ KA25VA TH SLZ KA25VA TH SLZ KA35VA TH SLZ KA35VA TH SLZ KA50VA TH SLZ KA50VA TH Temperature setting buttons ON OFF button Cv Down Fan Speed button CA Up EST Timer Menu button EA MITSUBISHI ELECTRIC Monitor Set button Filter button lt Enter gt button Mode button Return button Eo B Teme DON OFF Test Run button Set Time buttons CA Check button Clear button Back OMENU QONOFF CED Aresa G 4 BACK MONITOR SET DAY Airflow Up Down button Timer On Off button ki Set Day button ES Louver button Y Operation button lt N To return operation Opening the Cv number Ventilation button 7 AN A Operation button Built in temperature sensor CA
33. ce range Defective indoor fan motor Fan motor is defective Indoor controller board is defective Defective outdoor fan control Overcharge of refrigerant O Defective refrigerant circuit clogging Bypass circuit of outdoor unit is defective Cooling or drying mode Check clogging of the filter Remove shields Measure the resistance of fan motor s winding Measure the output voltage of fan s connector FAN on the indoor controller board xThe indoor controller board should be normal when voltage of AC 220 240V is detected while fan motor is connected Refer to 7 5 Check outdoor fan motor 00 Check operating condition of refrigerant circuit Heating mode O Check clogs of the filter 9 Remove shields Measure the resistance of fan motor s winding Measure the output voltage of fan s connector FAN on the indoor controller board xThe indoor controller board should be normal when voltage of AC 220 240V is detected while fan motor is connected Refer to 7 5 Check outdoor fan motor O OCheck operating condition of refrigerant circuit Pipe temperature Cooling mode Detected as abnormal when the pipe tem 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 min to detect Note 2 Abnormality P8 is not detected in drying mode Coo
34. controller circuit board as follows Conduct temperature check with outdoor controller circuit board after connecting A Control Service Tool PAC SK52ST Check converse connection of extension pipe or converse wiring of indoor outdoor unit connecting wire Error Code Abnormal point and detection method Cause Countermeasure Pipe temperature thermistor Condenser Evaporator TH5 O 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 dry ing and heating operation except defrosting Short 90 C or more Open 40 C or less O Defective thermistor characteristics Contact failure of connector CN29 on the indoor controller board Insert failure Breaking of wire or contact failure of thermistor wiring Temperature of thermistor is 90 C or more or 40 or less caused by defective refrigerant circuit Defective indoor controller board Check resistance value of thermistor For characteristics refer to P1 above Check contact failure of connector CN29 on the indoor controller board Refer to 7 5 Turn the power on and check restart after inserting connector again Operate in test run mode and check pipe lt condenser evaporator gt temperature with
35. detected check O below Check voltage output from CN2S on indoor power board DC13 1V Refer to 7 5 When no voltage is output check the wiring connection When output voltage is between DC12 5V and DC13 7V check below Check the wiring connection between indoor controller board and indoor power board Check the fuse on indoor controller board If no problems are found indoor controller board is defective When LEDI on indoor controller board is lit O Mis setting of refrigerant address for outdoor unit There is no unit corresponding to refrigerant address 0 O Check the setting of refrigerant address for outdoor unit Set the refrigerant address to 0 For grouping control system under which 2 or more outdoor units are connected set one of the units to 0 Set refrigerant address using SW1 3 6 on outdoor controller circuit board 2 LED2 on indoor controller board is blinking When LEDI on indoor controller board is also blinking Connection failure of indoor outdoor unit connecting wire When LEDI is lit O Miswiring of remote controller wires Under twin indoor unit system 2 or more indoor units O Refrigerant address for outdoor unit is wrong or not set Under grouping control system there are some units whose refrigerant address is 0 Short cut of remote controller wires Defective remote controller 20 Check indoor outdoor unit connecting wire f
36. e 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 SPECIFICATIONS Indoor service ref SLZ KA25VAL 1 TH SLZ KA25VA TH SLZ KA35VAL TH SLZ KA35VA TH SLZ KA50VAL 1 TH 512 5 Function Cooling Heating Cooling Heating Cooling Heating Power supply Single phase 230V 50Hz Single phase 230V 50Hz Single phase 230V 50Hz O e Air flow High Medium Low 600 540 480 660 540 480 660 540 480 Electrical Power outlet 10 10 20 Running current 1 0 35 0 40 0 65 Power input Rated frequency 75 85 85 Dew prevention heater 0 014 0 014 0 014 Power factor 1 90 93 94 94 97 97 Fan motor current 1 0 19 0 26 0 27 Model PK6V15 LD PK6V20 LL PK6V20 LM Winding resistance 2126 WHT BLK 407 BLK BLU 86 BLU YLW 30 BRN RED 165 WHT BLK 393 BLK BLU 164 BLU YLW 47 BRN RED 319 WHT BLK 325 BLK BLU 143 BLU YLW 47 BRN RED 309 Dimensions Width UNIT 570 22 7 16 PANEL 650 25 9 16 Height UNIT 208 8 3 16 PANEL 20 13 16 Depth UNIT 570 22 7 16 PANEL 650 25 9 16 Weight UNIT 16 5 PANEL 3 Air direction 4 4 4
37. erant circuit is causing thermistor temperature of 90 C or more or 40 C or less Defective indoor controller board Check resistance value of thermistor For characteristics refer to P1 above Check contact failure of connector CN21 on the indoor controller board Refer to 7 5 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 extreme difference with actual pipe liquid temperature replace indoor controller board Turn the power off and on again to operate after checking Drain sensor DS Suspensive abnormality if short open of thermistor is detected for 30 seconds continuously Turn off compressor and indoor fan Short open is detected for 30 seconds continuously during suspensive abnormality The unit returns to normal operation if it has been reset normally G Detect the following condition During cooling and drying operation In case that pipe liquid temperature room temperature 10deg Except defrosting When pipe liquid temperature or room temperature is short open temperature During drain pump operation O Defective thermistor characterist
38. error E5 O Abnormal if remote controller could not find blank of transmission path for 6 sec onds and could not transmit Error code E3 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 E3 O 2 remote controllers are set as main In case of 2 remote con trollers Remote controller is connected with 2 indoor units or more Repetition of refrigerant address Defective transmitting receiving circuit of remote controller O Defective transmitting receiving circuit of indoor controller board Noise has entered into trans mission wire of remote con troller Q 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 0 60 Diagnose remote controller a When RC OK 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 NG is displayed replace remote controller c When RC ERC 00 66 is dis played noise may be causing abnormali ty O 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 d
39. etecting it judges different data to be abnormal 30 continuous times Error code E5 18 Error Code Abnormal point and detection method Cause Countermeasure Indoor outdoor unit communication error Signal receiving error O 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 9 Consider the unit abnormal under the following condition When 2 or more indoor units are connected to one 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 O Contact failure short circuit or miswiring converse wiring of indoor outdoor unit connecting wire Defective transmitting receiving circuit of indoor controller board 9 Defective transmitting receiving circuit of indoor controller board Noise has entered into indoor outdoor unit connecting wire O 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 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 have defect in ca
40. for self check will blink when the ON OFF button is pressed twice within 3 seconds 7 2 2 Wireless remote controller Procedure O Turn ON the power While pressing both the MODE SELECT button and TOO COOL button on the remote controller at the same time press the RESET button Firstly release the RESET button And release the other 2 buttons since all LCD in operation display section of the remote controller is A MITSUBISHI ELECTRIC ON OFF WARD TOO FAN SELECT da CE ce displayed after 3 seconds 51x Transmit the signal of remote controller pressing ON OFF MODE button on the remote controller The above procedure allows OPERATION INDICATOR lamp to indicate the failure mode Transmit the signal of remote controller pressing ON OFF button to stop the self check OD RESET OPERATION INDICATER pem i 13 Refer to the following tables for details on the check codes Output pattern A Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION l fe 5 ne 13 2 INDICATOR 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 5 866 0 5 sec 0 5 sec starts X v J Start signal pr received Number of blinks beeps in pattern indicates the check Number of blinks beeps in pattern ind
41. fore troubleshooting check the followings Check the power supply voltage Check that the indoor outdoor connecting wire is correct 2 Take care of the followings during servicing O Before servicing the air conditioner be sure to turn off the remote controller first to stop the main unit and then turn off the breaker 2 When removing the indoor controller board hold the edge of the board with care NOT to apply stress on the components When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires x O HN 85 Housing point 7 2 SELF CHECK 7 2 1 Wired remote controller O Turn on the power Press the CHECK button twice Set address with TEMP button if system control is used Press the ON OFF button to stop the self check A CHECK button Address SEL CHECK TEMP button FI anal EH IC Indoor unit A OC Outdoor unit 866 Check code No trouble generated in the past O D D C F FFF No corresponding unit esas O Unit No 20 O Timer ON OFF button 81 gt u lt delete check code gt O Display the error code on the self check result display screen The address
42. h the line of drain sensor connector CN31 0 and is short circuited and abnormality reappears Refer to 7 5 Turn the power off and on again to operate after checking Error Code Abnormal point and detection method Cause Countermeasure Freezing overheating protection is working O Freezing protection Cooling mode The unit is in 6 minute resume prevention mode if pipe lt liquid or condenser evap orator gt temperature stays under 15C for 3 minutes after the compres sor started Abnormal if it stays under 15 C for 3 minutes again within 16 min utes after 6 minute resume prevention mode 9 Overheating protection Heating mode The units is in 6 minute resume prevention mode if pipe condenser evaporator temperature is detected as over 70 C after the compressor started Abnormal if the temperature of over 70 C is detected again within 10 minutes after 6 minute resume prevention mode Cooling or drying mode O 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 defective Defective outdoor fan control amp Overcharge of refrigerant O Defective refrigerant circuit clogging Heating mode O Clogged filter reduced airflow Short cycle of air path G Overload high temperature operation out of the toleran
43. icates code in the following table i e 5 for P5 the check code in the following table Output pattern B code in the following table i e 5 for U2 the check code in the Repeated Beepersounds Beep Beep Beep Beep Beep Beep OPERATION 111 4 AeL INDICATOR uU gt lamp blink Off On On On On pattern Self che 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 sec 0 5 sec starts V v I y de Number of blinks beeps in pattern indicates the check Number of blinks beeps in pattern indicates ollowing table Output pattern A Errors detected by indoor unit Wireless remote controller Wired remote controller Beeper sounds OPERATION R k INDICATOR lamp blinks Check code SUBIT Number of times 1 P1 Intake sensor error 2 2 Pipe 2 sensor error P9 Pipe TH5 sensor error 3 E6 E7 Indoor outdoor unit communication error 4 P4 Drain sensor error 5 P5 Drain pump error 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
44. ics Contact failure of connector CN31 on the indoor controller board Insert failure O Breaking of wire or contact failure of drain sensor wiring Defective indoor controller board Check resistance value of thermistor 6 0kQ 10 3 9kQ 30 C 1 3kQ Check contact failure of connector CN31 on the indoor controller board Refer to 7 5 Turn the power back on and check restart after inserting connector again Replace indoor controller board if drain pump operates with the line of drain sensor connector CN31 0 and is short circuited and abnormality reappears Turn the power off and on again to operate after checking Malfunction of drain pump DP O Suspensive abnormality if thermistor of drain sensor heats itself and temperature rises slightly Turn off compressor and indoor fan Drain pomp is abnormal if the condition above is detected during suspensive abnormality G Constantly detected during drain pump operation O Malfunction of drain pump Defective drain Clogged drain pump Clogged drain pipe Attached drop of water at the drain sensor Drops of drain trickles from lead wire Clogged filter is causing wave of drain Defective indoor controller board 16 O Check if drain pump works Check drain function Check the setting of lead wire of drain sensor and check clogs of the filter Replace indoor controller board if drain pump operates wit
45. ling range 3 deg 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 heating 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 3 deg TH5 TH1 Q Slight temperature difference between indoor room temperature and pipe liquid or condenser evaporator 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 condenser evaporator temperature thermistor Stop valve is not opened completely 17 Check pipe liquid or condenser evaporator temperature with room temperature display on remote controller and outdoor controller circuit board Pipe liquid or condenser evaporator temperature display is indicated by setting SW2 of outdoor
46. ng surface 8 2 FRESH AIR INTAKE AMOUNT amp STATIC PRESSURE CHARACTERISTICS SLZ KA25VAL TH SLZ KA25VA 1 TH SLZ KA35VAL 1 TH SLZ KA35VA 1 TH SLZ KA50VAL 1 TH SLZ KA50VA 1 TH Taking air into the unit Static pressure P Pa 50 0 0 5 1 0 How to read curves Air flow m3 min 15 20 25 30 3 5 50 100 150 200 250 300 NOTE Fresh air intake amount should be 20 or less of whole air amount to prevent dew dripping Duct characteristics O Curve inthe at site left graphs ree 0 ae A B O ut 4 D Q Q lt Qa Designed amount of fresh air intake lt m8 min gt Static pressure loss of fresh air intake duct system with air flow amount Q lt Pa gt Forced static pressure at air condi tioner inlet with air flow amount Q lt Pa gt Static pressure of booster fan with air flow amount Q lt Pa gt Static pressure loss increase amount of fresh air intake duct sys tem for air flow amount Q Pa Static pressure of indoor unit with air flow amount Q Pa a Estimated amount of fresh air intake without D lt m min gt 8 3 OPERATION IN CONJUNCTION WITH DUCT FAN BOOSTER FAN e Whenever the indoor unit operates the duct fan operates 1 Connect the optional multiple remote controller adapter PAC SA88HA E to the connector CN51 on the indoor
47. or connection failure O Check the connection of remote cotroller wires in case of twin triple indoor unit system When 2 or more indoor units are wired in one refrigerant system connect remote controller wires to one of those units Check the setting of refrigerant address in case of grouping control system If there are some units whose refrigerant addresses are 0 in one group set one of the units to 0 using SW1 3 6 on out door controller circuit board YO Remove remote controller wires and check LED2 on indoor controller board When LED2 is blinking check the short cut of remote controller wires When LED2 is lit connect remote controller wires again and if LED2 is blinking remote controller is defective if LED2 is lit connection failure of remote controller terminal block etc has returned to normal 7 5 TEST POINT DIAGRAM 7 5 1 Indoor power board SLZ KA25VAL TH SLZ KA35VAL TH SLZ KA50VAL TH SLZ KA25VA TH SLZ KA35VA TH SLZ KASOVA TH SLZ KA25VAL1 TH SLZ KA35VAL1 TH SLZ KASOVAL TH SLZ KA25VA TH SLZ KA35VA1 TH SLZ KA50VA1 TH CN2S Connect to the indoor controller board CN2D between to B 12 6 13 7V DC Pin RGO 082358 zio lo 81 Be GK SEO o 240 088 Hg 15 3 1174 IM U o 25 o I 7 8 MT so 8 se H iu fan CNSK
48. rain sensor leadwire mounted Check the filter clogging Check the piping connection Check the indoor outdoor connecting wires GCheck the room temperature display of remote controller Check the indoor liquid pipe temperature display of outdoor controller board 7 4 TROUBLESHOOTING BY INFERIOR Note Refer to the manual of outdoor unit for the detail of remote Phenomena controller Cause Countermeasure 1 LED2 on indoor controller board is off When LEDI on indoor controller board is also off O Power supply of rated voltage is not supplied to out door unit Defective outdoor controller circuit board 9 Power supply of 220 240V is not supplied to indoor unit Defective indoor power board Defective indoor controller board O Check the voltage of outdoor power supply terminal block L or Ls When 220 240V is not detected check the power wiring to outdoor unit and the breaker When AC 220 240V is detected check below Check the voltage between outdoor terminal block S1 and S2 When AC 220 240V is not detected check the fuse on outdoor controller circuit board check the wiring connection When AC 220 240V is detected check below Check the voltage between indoor terminal block S1 and S2 When AC 220 240V is not detected check indoor outdoor unit connecting wire for miswiring When AC 220 240V is
49. se of twin indoor unit system Indoor outdoor unit communication error Transmitting error Abnormal if 1 receiving is detected 30 times continuously though indoor controller board has transmitted 0 Defective transmitting receiving circuit of indoor controller board Noise has entered into power supply 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 normally read from the nonvolatile memory of the indoor controller board O Defective indoor controller board O Replace indoor controller board Remote controller control board Abnormal if data cannot be normally read from the nonvolatile memory of the remote controller control board Error code E1 Abnormal if the clock function of remote controller cannot be normally operated Error code E2 O Defective remote controller Q Replace remote controller Forced compressor stop due to water leakage abnormality When the intake temperature subtracted with liquid pipe temperature is less than 10 C drain sensor detects whether it is soaked in the water or not at the interval of 90 seconds Drain pump will start operating when the drain sensor detects to be soaked in the water The unit has a water leakage abnormali ty when the following conditions a
50. seness 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 B Check wiring of remote controller Total wiring length max 500m Do not use cablex 3 or more The number of connecting indoor units max 16 units The number of connecting remote con troller max 2 units When the above mentioned problem of O are not seen Diagnose remote controllers a When RC is displayed remote controllers 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 When RC is displayed When ERC 00 06 is displayed d 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 not receive normally any data 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 O Defective transmitting receiving circuit of indoor controller board of refrigerant address 0 Noise has entered into the transmission wire of remote controller 9 Remote controller transmission error E3 signal receiving
51. stics Contact failure of connector CN20 on the indoor controller board Insert failure G Breaking of wire or contact failure of thermistor wiring Defective indoor controller board Check resistance value of thermistor 15 0 0 10 9 6 20 C 6 3kQ 30 C 4 3kQ 40 C 3 0kQ If you put force on draw or bend the lead wire with measuring resistance value of thermistor breaking of wire or contact failure can be detected Check contact failure of connector CN20 on the indoor controller board Refer to 7 5 Turn the power back on 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 checking Pipe temperature thermistor Liquid TH2 O The unit is in 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 or more Open 40 C or less Defective thermistor characteristics Contact failure of connector CN21 on the indoor controller board Insert failure G Breaking of wire or contact failure of thermistor wiring W Defective refrig
52. t to change without notice Made in Japan
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