TECHNICAL & SERVICE MANUAL
Contents
1. 3 Alsi 515 5 5 O D 32 1 9 32 32 1 9 32 Noise level Low Mid High dB lt A gt 23 26 30 23 28 33 measured in anechoic room Refrigerant control device C Protection devices Fuse 250V 6 3A Fuse 250V 6 3A Insulation material Polystyrene foam Polyethylene foam Urethane foam Polystyrene foam Polyethylene foam Urethane foam Air filter PP Honeycomb fabric washable PP Honeycomb fabric washable i Heat exchanger Cross fin Aluminum fin and copper tube Cross fin Aluminum fin and copper tube Varistor ERZV10D471 ERZV10D471 Terminal block To outdoor unit 3P To wired remote controller 2P To outdoor unit To wired remote controller 2P Power outlet Standard Document attachment Accessory Optional parts Remark Installation Manual Instruction Book Installation Manual Instruction Book Drain hose flexible joint Remote Controller Drain hose flexible joint Remote Controller Drain lift up mechanism PAC KEO7DM E Drain lift up mechanism PAC KEO7DM E Co Note 1 Cooling Heating capacity indicates the maximum value at operation under the following condition Cooling Indoor 27 CD B 19 CW B 81 FD B 66 FW B Outdoor 35 CD B 95 FD B Heating Indoor 20 CD B 68 FD B Outdoor 7 CD B 6 CW B 45 FD B 43 FW B Pipe length 7 5m 24 9 16ft Height difference Om Oft 2 The external static pressure is set to 15 Pa at factory shipment2. 1 a 1 1 E q LE 3 ue E 1 a Q nii A aei wr LO 1 w ELI Ed 5 L x W k L F amp x L1 m i TL LEE 9 E Fa EF p 7 by LES CNO1 SWE SW1 SW2 CN32 CN22 CN51 CN41 CN44 CN4F CN20 CN3C CNMF Vcc Vsp Power supply voltage 220 240VAC Emergency operation Model selection Capacity setting Remote start stop adapter For MA remote controller cable con nection 10 13 Between 1 and 3 Centralized control JAMA standard HA terminal A Thermistor liquid condenser evaporator temperature Float thermistor Thermistor Inlet temperature Indoor outdoor transmission 0 24VDC Fan motor output 1 4 310 340 VDC 5 4 15 6 4 0 6 5 VDC 7 4 Stop 0 or 15 VDC Run 7 5 VDC 0 15 pulse Drain up mechanism output 200VAC LOSSNAY Wireless remote controller Voltage on the side of PC672 and C955 Same with the voltage between 7 and 4 of CNMF Voltage between the C955 pins 15 VDC Same with the voltage between 5 and 4 of CNMF Voltage between the C626 pins OVDC with the fan stopped 1 6 5VDC with the fan in operation Same with the voltage between 6 and 4 of CNMF x C O 6 6 TROUBLE CRITERION OF MA
3. Viewed from the direction of El Fig 2 the arrow A Access door 3 Ceiling 50 700 Min 300 mm Fig 3 1 Electric box 50 700 Min 300 mm 475 450 X s i Access door 1 i co 450x450 i lt Electric box PAS 100 200 Bottom of indoor unit Bottom of indoor unit N Access door 4 a TTT Maintenance access space Viewed from the direction of Fig 5 the arrow B Access door 3 B TIT Maintenance access space Mode SEZ KD25 50 150 SEZ KD35 50 900 150 250 Fig 4 UE BE SEZ KD60 71 1100 250 350 25 io 19 4 WIRING DIAGRAM SEZ KD25VA L SEZ KD35VA L SEZ KD50VA L SEZ KD60VA L SEZ KD71VA L INSIDE SECTION OF CONTROL BOX aus EE i MEE E TOMA REMOTE ed UENIT E For SEZ KD VA pum a CN32 CN51___CN41 L1 only Um SEZ KD71VA L IL L gt F I noon LED1 m RU RECEIVER lo SW1 SW2 For SEZ KD VAL Optional Parts Optional Parts SYMBOL EXPLANATION INDOOR CONTROLLER BOARD INDOOR OUTDOOR CONNECTING LINE REMOTE CONTROLLER TRANSMISSION LINE CONNECTOR EMERGENCY OPERATION NOTE 1 Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing 2 Indoor and outdoor connecting wires are made with polarities make
4. 3 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 Check converse connection of extension pipe or converse wiring of indoor outdoor unit connecting wire 27 Abnormality of pipe temperature ther D Defective thermistor D G Check resistance value of thermistor mistor Condenser Evaporator TH5 characteristics For characteristics refer to P1 above D The unit is in three minute resume pro Contact failure of connector Check contact failure of connector CN44 tection mode if short open of thermistor 44 on the indoor controller on the indoor controller board is detected Abnormal if the unit does board Insert failure Refer to 6 5 not get back to normal within three min Breaking of wire or contact u restart after unit ae to oe opera failure of thermistor wiring Operate in test run mode and check pipe ion if it has normally reset Temperature of thermistor 15 lt condenser evaporator gt temperature Constantly detected during cooling dry 90 C or more or 40C or less If pipe lt condenser evaporator gt tempera ing and heating operation except caused by defective refrigerant ture is extremely low in cooling mode or defrosting circuit high in heating mode refrigerant circuit Short 90
5. 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 minutes to detect Note 2 Abnormality P8 is not detected in drying mode Cooling range 3 deg TH TH1 TH Lower temperature between liquid pipe temperature TH2 and con denser 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 defrost ing mode is over Heating range 3 deg lt TH5 TH1 Cooling or drying mode Clogged filter reduced airflow Short cycle of air path Low load low temperature operation beyond the tolerance range Defective indoor fan motor Fan motor is defective Indoor controller board is defective Cooling or drying mode Check clogging of the filter 2 Remove shields Refer to 6 7 DC Fan motor FAN MOTOR INDOOR CONTROLLER BOARD Check outdoor fan motor Check operating condition of refrigerant circuit Defective outdoor fan control amp
6. External static pressure Pa External static pressure Pa m Middle Rated point LLLA 10 0 6 7 8 9 10 11 12 Airflow rate m min Airflow rate m min SEZ KD35VA L SEZ KD35VA L External static pressure 35Pa 220 240V 50 60Hz External static pressure 50Pa 220 240V 50 60Hz 80 80 70 70 60 60 Rated point _ High 25 P 30 30 External static pressure Pa External static pressure Pa 20 20 AN LLL NN mI as 9 Airflow rate m min Airflow rate m min 14 SEZ KD50VA L SEZ KD50VA L External static pressure 5Pa 220 240V 50 60Hz External static pressure 15Pa 220 240V 50 60Hz 50 Littl Le 8 O K External static pressure External static pressure Pa 10 0 8 9 10 11 12 13 14 15 16 8 9 10 11 12 13 14 15 16 Airflow rate m min Airflow rate m min SEZ KD50VA L SEZ KD50VA L External static pressure 35Pa 220 240V 50 60Hz External static pressure 50Pa 220 240V 50 60Hz 80 80 7 vns Low 20 20 10 10 0 0 8 9 10 11 12 13 14 15 16 8 9 14 15 1 Airflow rate m min Airflow rate m min External static pressure Pa External static pressure Pa 15 SEZ KD60VA L SEZ KD60VA L External static pressure 5Pa 220 240V 50 60Hz External static pressure 15Pa 220 240V 50 60Hz External static pres
7. 3 Wired Remote Controller for model Wireless Remote Controller for VAL model Operation Mode Power source Power input Current Temperature set range Remote controller Airflow direction Fan Type x Quantit External static press Motor type Motor output SEZ KDS0VA L Cooling Heating 220 240V 50 60Hz 0 07 0 63 C F 19 to 30 67 to 86 17 to 28 63 to 83 Sirocco fan x 3 5 15 35 50 DC blushless motor 0 096 Driving mechanism Direct driven Airflow rate Low Mid High 10 0 12 5 15 0 External_finish Galvanized External dimension 200 x 900 x 700 HxWxD 7 7 8 x 35 7 16 x 27 9 16 Net weight Wiring 1 6 1 8 06 35 01 4 Flare 012 7 01 2 Flare O D 32 1 9 32 Noise level Low Mid High dB lt A gt 30 34 37 30 34 38 measured in anechoic room Insulation material Polystyrene foam Polyethylene foam Urethane foam Air filter PP Honeycomb fabric washable Refrigerant control device I a Protection devices Fuse 250V 6 3A Heat exchanger Cross fin Aluminum fin and copper tube Varistor ERZV10D471 Terminal block To outdoor unit To wired remote controller 2P Standard Installation Manual Instruction Book attachment Drain hose flexible joint Remote Controller Drain hose flexible joint Remote Controller Optional pats Drain lift up mechanism 7 Drain lift up mechanism 7 Remark U C U U pu O Note 1 Cooling Heating capacity indicat
8. Drain pump is abnormal if the condition malfunction of moving parts moving part of float switch UP or OPEN with above is detected during suspensive cause drain float switch to be the moving part of float switch down abnormality detected under water Switch Replace float switch if it is short with the P5 3 Constantly detected during drain pump On moving part of float switch down operation Defective indoor controller Replace indoor controller board if it is short board 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 O Turn the power off and on again to operate after check 26 xl C O Freezing overheating protection is working D Freezing protection Cooling mode The unit is in six minute resume prevention mode if pipe liquid or condenser evap orator temperature stays under 15 for three minutes after the com pressor started Abnormal if it stays under 15 for three minutes again within 16 minutes after six minute resume prevention mode Overheating protection Heating mode The units is in six minute resume prevention mode if pipe Liquid or con denser evaporator temperature is detected as over 70 C after the com pressor started Abnormal if the temper ature of over 70C is detected again within 10 minutes after six minute resume prevention mode Pipe temperature Cooling mode
9. SEZ KD50VA L SEZ KD60VA L SEZ KD71VA L LL JL lt Air Air outlet inlet e e TT Suspension hole 5 POLE 22 00000000 COCO SRS SOOO OO A QX K oo lt 4 LX 25 D Duct 100X E 1 B Suspension bolt pitch 100XJ 55 lt S e ITV SoS e Air filter Knockout hole Z27 Remote controller transmission line Refrigerant piping a 4 14X30 Slot flare connection liquid 10 Controlbox Knockout hole 427 N 10 2X2 42 9 116 70 Terminal block Indoor outdoor connecting line a Refrigerant piping 270 Terminal block Remote controller transmission line flare connection gas Teak ee ok ae Drain pipe O D d32 Spontaneous draining aes 752 798 660 SEZ DOVA SEZ SEZ KD50VA L SES eva 900 95 ia SEZ KD60VA L 1100 1152 1198 1060 952 SEZ KD71VA L Note1 Use M10 screw for the suspension bolt field supply 2 Keep the service space for the maintenance at the bottom 3 This chart indicates for SEZ KD50VA L model which has 3 fans SEZ KD25 35VA L models have 2 fans SEZ KD60 71VA L models have 4 fans 4 In case an inlet duct is used remove the air filter supply with the unit then install the filter field supply at suction side 18 x
10. z Q AL eu ce oe EN TERESHOLD OF HEARING FOR CONTINUOUS NOISE F 7 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz TEAM NOTE The sound level is measured anechoic room where echoes few when compressor stops The sound may be bigger than displayed level under actual installation condition by surrounding echoes The sound level can be higher by about 2 dB than the displayed level during cooling and heating operation _ INES SEZ KD50VA L NOTCH SPU External static pressure 5Pa High 16 Co Low 152 _ _ N e o 5 O e o OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB P A HN TERESHOLD OF HEARING FOR quus M p 63 1 E 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz d Ll OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB HR lhe ad dl Hod fel te ne 2 p N 4 bb ere een 8 lt 50 60Hz gt SEZ KD50VA L pee External static pressure 35Pa 0 0002 ubar dE A O o o e eo VATI GEH SNS BAN M OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB ER TERESHOLD OF HEARING FOR ia pores 63 12 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB z d N EH go MAREA 50 60Hz S
11. C O SEZ KD25VA L SEZ KD35VA L SEZ KD50VA L SEZ KD60VA L SEZ KD71VA L Secure enough access space to allow for the maintenance inspection and replacement of the motor fan drain pump heat exchanger and electric box in one of the following ways Select an installation site for the indoor unit so that its maintenance access space will not be obstructed by beams or other objects 1 When a space of 300 mm or more is available below the unit between the unit and the ceiling Fig 1 e Create access door 1 and 2 450 x 450 mm each as shown in Fig 2 Access door 2 is not required if enough space is available below the unit for a maintenance worker to work in 2 When a space of less than 300 mm is available below the unit between the unit and the ceiling At least 20 mm of space should be left below the unit as shown in Fig 3 e Create access door 1 diagonally below the electric box and access door 3 below the unit as shown in Fig 4 Or Create access door 4 below the electric box and the unit as shown in Fig 5 Unit mm 700 Min 300 mm 450x480 Access door 2 Electric 90x A 450 450 Access door 2 450 x 450 Ceiling yee Bottom of indoor unit i i ES MEM PE RES 124 hs Maintenance access space JE box Ceiling beam E air
12. C or more 5 Defective indoor controller may have defect Open 40 or less board amp When no problems are found above replace the indoor unit control board Remote controller transmission Contact failure at transmission Check disconnection or looseness of indoor error EO signal receiving error E4 wire of remote controller unit or transmission wire of remote controller D Abnormal if main or sub remote con All remote controllers are set Set one of the remote controllers main if troller can not receive normally any as sub remote controller In there is no problem with the action above transmission from indoor unit of refriger this case EO is displayed Check wiring of remote controller ant address 0 for three minutes remote controller and E4 is j s el 2066 oep Ayee l RM e The number of connecting indoor units Abnormal if sub remote controller could on the outdoor controller circuit max eunits not receive for any signal for two min board The number of connecting remote con utes Error code EO Mis wiring of remote controller troller max 2units Defective transmitting receiving Abnormal if indoor controller board can circuit of remote controller When it is not the above mentioned problem of not receive normally any data from Defective transmitting receiving O EO remote controller board or from other circuit of indoor controller board Diagnose remote c
13. i External static pressure 35Pa 0 0002 ubar WCU AMAT z z Q Q e o gt n e eo OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB EN TERESHOLD OF HEARING FOR CONTINUOUS NOISE F 7 r 63 125 250 500 1000 200 4000 8000 BAND CENTER FREQUENCIES Hz OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB z e N ER zzi in a ES ES SR PS m lt 50 60Hz gt High 38 Middle SEZ KD60VA L External static pressure 15Pa 0 0002 ubar z Q N Gol M el hon hhh dL o 2 Q 5 wass 4 gt Q REN TERESHOLD OF HEARING FOR CONTINUOUS EF p o 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz z Q N CII lt 50 60Hz gt SEZ KD60VA L pe External static pressure 50Pa 0 0002 ubar o eo gt SS S CNS BS S gt SS S ED gt FE TERESHOLD OF HEARING FOR CONTINUOUS NOISE L 7 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz z Q N Eo x JN N E lt ER E EN ES a NOTE The sound level is measured anechoic room where echoes are few when compressor stops The sound may be bigger t
14. 1VA L model only 1 Removing the bearing 1 Remove the two fixing screws on the bearing cover K to remove it Fig 13 2 Remove the two bearing retainer screws to remove the bearing Fig 14 7 Heat exchanger 1 Remove the drain pan according to the proce dure in section 3 2 Remove the heat exchanger cover according to the procedure in section 4 2 3 Removing the cover 1 Remove the two fixing screws on the cover L to remove it Fig 15 4 Removing the Heat exchanger 1 Remove the fixing screws on the heat exchanger M to remove it MITSUBISHI ELECTRIC CORPORATION http Global MitsubishiElectric com New publication effective Sep 2012 HWE0711C Specifications subject to change without notice
15. EZ KD50VA L NOTCH SPL LINE External static pressure 15Pa High 16 Low _ _ 2 Q N e z z Q Q e o o A HEN TERESHOLD OF HEARING FOR ques an 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz TIANA VAT Z Q N NEAR WANN NI AL D LL sa 50 60Hz SEZ KD50VA L External static pressure 50Pa 0 0002 ubar 8 10727271 MATT nm G eo Fan TERESHOLD OF HEARING FOR CONTINUOUS NOISE L 7 eu 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz z QO N nf ne fon Le ooo eo lo NOTE The sound level is measured anechoic room where echoes few when compressor stops The sound may be bigger than displayed level under actual installation condition by surrounding echoes The sound level can be higher by about 2 dB than the displayed level during cooling and heating operation 10 __ O lt 50 60Hz gt igh 37 SEZ KD60VA L External static pressure 5Pa 0 0002 ubar z Q A 5 o OCTAVE BAND SOUND PRESSURE LEVEL 0 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB TERESHOLD OF HEARING FOR CONTINUOUS EDD F 3j poc 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz z Q N HE pig laf a lt 50 60Hz gt SEZ KD60VA L i
16. IN PARTS SEZ KD25VA L SEZ KD35VA L SEZ KD50VA L SEZ KD60VA L SEZ KD71VA L Check method and criterion Room temperature Measure the resistance with a tester thermistor Part temperature 10 30 C TH1 Pipe temperature m thermistor liquid 8kQ 20kQ Opened or short circuited TH2 Condenser evaporator temperature thermistor TH5 Wiring diagram Vm Power supply for motor Vcc Power supply for control Vsp Speed command voltage PG Pulse output for rotation 32 xl C O 6 7 DC FAN MOTOR FAN MOTOR INDOOR CONTROLLER BOARD Check method of DC fan motor motor indoor controller circuit board Notes High voltage is applied to the connecter CNMF for the fan motor Give attention to the service Do not pull out the connector CNMF for the motor with the power supply on It causes trouble of the indoor controller circuit board and fan motor Self check Symptom The indoor fan cannot turn around Check the fuse FUSE on indoor controller board Check the drain pump Replace indoor controller board 1 Did the fuse blow gt Yes gt Is the resistance between Yes gt Ras fan motor MF i terminals normal v Wiring contact check No Contact of fan motor connector CNMF NY V drain pump Is there no contact failure gt No 3 Y Yes Power supply check Remove the connector CNMF Measure the voltage in the indoor c
17. MITSUBISHI Changes for the Better z a ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS 201 2 R410A TECHNICAL amp SERVICE MANUAL Ceiling Concealed Model name Indoor unit SEZ KD25VA L SEZ KD35VA L SEZ KD50VA L SEZ KD60VA L SEZ KD71VA L WIRED REMOTE WIRELESS REMOTE CONTROLLER CONTROLLER SLIM CONTENTS 4 DART NAMES AND FUNCTIONS FLUE REV IMS SX OUO OU Ead Ida aedi 2 3 eBECIBICATIONS TT CeCe rere eer 3 OUTLINES AND DIMENSIONS 18 WIRING DIAGRAM equidad apr u l u ere ee rece rT 20 REFRIGERANT SYSTEM aaa fa sain rice 21 TROUBLESHOOTING lu 22 T DISASSEMBLY lt lt 34 PART NAMES AND FUNCTIONS Indoor Unit SEZ KD25VA L SEZ KD35VA L SEZ KD50VA L SEZ KD60VA L SEZ KD71VA L Air outlet Air outlet duct flange Air inlet Wired remote controller Once the controls are set the same operation mode can be repeated by simply pressing the ON OFF button Operation buttons Set Temperature buttons Start Stop button Down T Fan Speed button Up EA MITSUBISHI ELECTRIC Timer Menu button Monitor Set button Filter button
18. Mode button Return button lt return sign gt button V Back DMf Omose al Ts FILTER D Ahead CU J A uu nw sp Ce BACK MONTORSE DAY CHECK TEST X ADM coc pou Airflow Up Down button Timer On Off button PAR 21MAA CLOCK V OPERATION A K CLEAR Set Day button E Louver button i V Operation button To preceding operation Opening the PT door Ventilation button A Operation button A To next operation number N Display Sensor indication For purposes of this explanation all parts of the display are shown as lit During actual operation only the relevant items will be lit Time Timer Display Shows the current time unless the simple or Auto Off timer is set If the simple or Auto Off timer is set shows the time remaining Identifies the current operation Shows the operating mode etc Multilanguage display is sup ported TIME SUN MON TUE THU FRI SAT TIMER IiI ih ON AFTER L 0L AFTER OFF Centrally Controlled indicator ES Indicates that operation of the re mote controller has been prohib A ONLY1Hr w ited by a master controller de m Air Direction indica Ventilation indicator or Timer Is Off indicator Appears when the unit is running in The indicator N shows the direc Ventilatio
19. Overcharge of refrigerant Defective refrigerant circuit clogs Heating mode D Clogged filter reduced airflow 2 Short cycle of air path Over load high temperature operation beyond the tolerance range Defective indoor fan motor Fan motor is defective Indoor controller board is defective Heating mode D Check clogs of the filter Remove shields Refer to 6 7 DC Fan motor FAN MOTOR INDOOR CONTROLLER BOARD Check outdoor fan motor Check operating condition of refrigerant circuit Defective outdoor fan control 6 Overcharge of refrigerant Defective refrigerant circuit clogs Bypass circuit of outdoor unit is defective Q Slight temperature difference between indoor room temperature and pipe liquid or condenser evaporator temperature thermistor e Shortage of refrigerant Disconnected holder of pipe Check pipe liquid or condenser evaporator gt temperature with room temperature display on remote controller and outdoor controller circuit board Pipe liquid or condenser evaporator temperature display is indicated by liquid or condenser setting SW2 of outdoor controller circuit evaporator thermistor board as follows Defective refrigerant circuit Conduct temperature check with outdoor Converse connection of controller circuit board after connecting extension pipe on plural units Control Service Tool PAC SK52ST connection
20. TEMP button if system control is used 4 Press the ON OFF button to stop the self check CHECK button An es Refrigerant address rese ea 19 TEMP button IC Indoor unit OC Outdoor unit Check code For description of each check code refer to the following table D Check code Symptom Pipe TH2 sensor error Pipe TH5 sensorerror P4 P5 i EE i i E9 UP P Drainpumperror S PO _ Freezing Overheating protection operation Communication error between indoor and outdoor units j Pa Pipe temperature error EO ES E5 Fb _ Indoor unit control system error memory error ete U 4 4 4 8 4 i 4 4 4 i O E9 _ Indoor outdoor unit communication error Transmitting error Outdoor unit U Compressor overcurrent interruption 02 For details check the LED display U1 Ud Abnormal high pressure 63H worked Overheating protection operation of the outdoor controller board Abnormal temperature of heat sink As for outdoor unit refer to U5 Outdoor unit fan safeguard stop C Compressor overcurrent interruption Abnormal of power module U7 Abnormality of super heat due to low discharge temperature U9 UH Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit Current sensor erro
21. UNE LINE SEZ KD25VA L NOTCH External static pressure 35Pa High ESE lt SS NSN SSS SS EE n2 co 0 0002 ubar Z C LLL LLL LAAI AAAA ooo OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB ERBEN TERESHOLD OF HEARING FOR CONTINUOUS NOISE D 1 63 125 250 500 1000 2000 4000 8000 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 3 z N 2 z 1 1 Q 1 PARRA i 1 F BAND CENTER FREQUENCIES Hz lt 50 60Hz gt pe SEZ KD25VA L External static pressure 15Pa EEE NAV N NN s N lt APPROXIMATE ES OF HEARING FOR E SEZ KD25VA L External static pressure 50Pa 0 0002 ubar 45 N eo 4 N d Si 2 LLY dy N Z Q A o q np p LL eee dele OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB N 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz E UNES LINE Pg s 0 0002 ubar ZL T CZ IZ TT T n TERESHOLD OF HEARING FOR CONTINUOUS NOISE C4 p 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz A Jag AME JN ME NE L 2 Q N EEE NE 8 REN II m NOTE The sound level is measured in an anechoic room where echoe
22. controller towards the indoor unit receiver while fol lowing steps 2 to 7 e It is not possible to run the in FAN DRY or AUTO mode 23 Output pattern A Errors detected by indoor unit Wired remote Wireless remote controller controller Beeper sounds OPERATION Symptom Remark INDICATOR lamp flashes Check code Number of times Tite sensor nto Pipe Liquid or 2 phase pipe sensor erro r 3 EE communication enor SSS P 6 P6 PeezngOveesingssegusdoperdlon E Communisonemorbetweenindoorandoudoorunls O o x 8 P x 9 Remote indoor unit control system error memory error etc cG Refrigerant circuit abnormal MEME Nosumd Nocorresponding w Output pattern B Errors detected by unit other than indoor unit outdoor unit etc Wireless remote controller Beeper sounds OPERATION INDICATOR Symptom Remark lamp flashes Number of times Indoor outdoor unit communication error Transmitting error Outdoor unit 0x Gemwesoemaenwepl n Tenis of outdoor unit thermstors Fors overcurrentinteraption When compressor oe Fron gh discharging trperature 4SC worked nsuficenteigerant PB Abnormal high pressure 63H worked Overheating safeguard operation Abnormal temperature of heat sink For details check the LED 2 Frat unit fan protecti
23. ct failure of connector CN44 on the indoor controller board Refer to 6 5 Turn the power on again 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 defective 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 check switch is disconnected Turn the power on again and check after and of connector CN4F is not inserting connector again 9 01 short circuited Defective indoor controller Operate with connector CN4F short circuited Constantly detected during operation board Replace indoor controller board if abnormali ty reappears Drain overflow protection operation Malfunction of drain pump D Check if drain up machine works D Suspensive abnormality if drain float 2 Defective drain 2 Check drain function switch is detected to be underwater for 1 Clogged drain pump minute and 30 seconds continuously Clogged drain pipe with drain pump on Defective drain float switch 3 Remove drain float switch connector CNAF Turn off compressor and indoor fan Catch of drain float switch or and check if it is short Switch On with the 2
24. e receiver on the indoor unit is flashing the Oe Bee unit needs to be inspected Consult your dealer for service first Install the batter ies in the correct direc Handle the remote controller carefully Do not drop the remote controller or tions subject it to strong shocks In addition do not get the remote controller wet or leave it in a location with high humidity avoid misplacing the remote controller install the holder included with the remote controller on a wall and be sure to always place the remote controller in the holder after use Press the Reset button Press the Reset button with an object that has a narrow end 2 SPECIFICATIONS Model Name SEZ KD25VA L SEZ KD35VA L Operation Mode Cooling Heating Power source 220 240V 50 60Hz Power input 0 04 Current 0 39 Temperature set range Remote controller C F 19 to 30 67 to 86 17 to 28 63 to 83 19 to 30 67 to 86 17 to 28 63 to 83 Airflow direction p Fan Sirocco fan x2 5 15 35 50 DG blushless motor 0 096 Direct driven cmn 557090 External finish Galvanized External dimension 200 x 700 x 700 HxWxD 7 7 8 x 27 9 16 x 27 9 16 6 Net weight 1 Wiring 1 6 1 8 1 6 1 8 06 35 01 4 Flare 06 35 01 4 Flare piping diameter Gas R410A 9 52 03 8 Flare 9 52 3 8 Flare Drain piping diameter O gt illi Min size of wire Amperage of wire breaker A Refrigerant Liquid R410A mm i
25. erant The address changes to a separate setting different data to be abnormal 30 address continuous times Error code E3 Defective transmitting receiving Diagnose remote controller circuit of remote controller a When RC OK is displayed remote con Abnormal if indoor controller board could trollers h bl Defective transmitting receiving rovers have no problem not find blank of transmission path rerit OF Turn the power off and on again to check Error code E5 circuit of indoor controller CAE powe 9 m or Indoor controller board receives trans board ae Sane based aga rep ase E5 mitted data at the same time compares Noise has entered into trans b When RC NG is displayed replace remote controller troller c When RC E3 or ERC 00 66 is displayed noise may be causing abnormality the data and when detecting it judges mission wire of remote con different data to be abnormal 30 continuous times Error code E5 28 x C O Indoor outdoor unit communication Contact failure short circuit or Check LED display on the outdoor control cir error Signal receiving error mis wiring converse wiring of cuit board Connect A control service tool D Abnormal if indoor controller board indoor outdoor unit connecting PAC SK52ST cannot receive any signal normally for Wire Refer to Outdoor manual six minutes after turning the power on D Check disconnect
26. es the maximum value at operation under the following condition Cooling Indoor 27 CD B 19 CW B 81 FD B 66 FW B Outdoor 35 CD B 95 FD B Heating Indoor 20 CD B 68 FD B Outdoor 7 CD B 6 CW B 45 F D B 43 FW B Pipe length 7 5m 24 9 16ft Height difference Om Oft 2 The external static pressure is set to 15 Pa at factory shipment 3 Wired Remote Controller for model Wireless Remote Controller for VAL model 22 Min size of wire Amperage of wire breaker A Refrigerant Liquid R410A mm i piping diameter Gas R410A Drain piping diameter Sms o 5 Drainpiping diameter mm in i eo SEZ KD71VA L Heating CCF 17 to 28 63 to 83 E Airflow direction Fan x Quantit 5 15 35 50 Motor type DC blushless motor External static press Motor output i Airflow rate Low Mid High mamin External finish External dimension HxWxD Net weight Wiring 7 7 8 x 43 5 16 x 27 9 16 in 1 6 1 8 A 15 09 52 03 8 Flare 15 88 05 8 Flare O D 32 1 9 32 30 35 40 TE 3 Min size of wire Amperage of wire breaker Refrigerant Liquid R410A mm in piping diameter Gas R410A Drain piping diameter Noise level Low Mid High measured in anechoic room Insulation material Polystyrene foam Polyethylene foam Urethane foam Air filter PP Honeycomb
27. fabric washable Refrigerant control device Protection devices Fuse 250V 6 Heat exchanger Cross fin Aluminum fin and copper tube Varistor ERZV10D471 Terminal block To outdoor unit 3P To wired remote controller 2P Power outlet Standard Document Installation Manual Instruction Book attachment Accessory 2 2 3 5 dB lt A gt eo Co Drain hose flexible joint Remote Controller Optional parts Drain lift up mechanism 7 Remark Note 1 Cooling Heating capacity indicates the maximum value at operation under the following condition Cooling Indoor 27 CD B 19 CW B 81 FD B 66 FW B Outdoor 35 CD B 95 FD B Heating Indoor 20 CD B 68 FD B Outdoor 7 CD B 6 CW B 45 FD B 43 FW B Pipe length 7 5m 24 9 16ft Height difference Om Oft 2 The external static pressure is set to 15 Pa at factory shipment 3 Wired Remote Controller for model Wireless Remote Controller for VAL model _ NOISE CRITERION CURVES SEZ KD25VA L External static pressure 5Pa lt 50 60Hz gt High 29 Middle 25 eese 0 0002 ubar jNC 7 5 MLN ih OY I z z z o o G eo NS uem OF 1111 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB HEARING FOR o N E ue J f 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz S
28. han displayed level under actual installation condition by surrounding echoes The sound level can be higher by about 2 dB than the displayed level during cooling and heating operation 11 _ lt 50 60Hz gt NOTCH SPL dB LINE 39 SEZ KD71VA L External static pressure 5Pa High Low Co 29 0 0002 ubar Q N e OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB pA ATA z Q HEN TERESHOLD OF HEARING FOR CONTINUOUS fhe 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB z n N ved bald a Model ene eae ave of of loaf nn AMA aa ad ane 50 60Hz SEZ KD71VA L External static pressure 35Pa ENEEEEEEE K SEEEE 0 0002 ubar NC 7 eo e eo M OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB EE SN EN TERESHOLD OF HEARING FOR CONTINUOUS OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB mud 2 di N NE A N TRE ace NC SEAS CNL 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 displayed level under actual installation condi tion by surrounding echoes The sound level can be higher by about 2 dB than the displayed level during cool
29. hort piping 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 Indicates state of communication between the indoor and outdoor units outdoor units Make sure that this LED is always blinking Wireless remote controller 1 Turn on the power to the unit at least 12 hours before the test run 2 Press the TEST RUN button twice continuously Start this operation from the status of remote controller display turned off and current operation mode are displayed 3 Press the MODE button to activate COOL mode then check whether cool air is blown out from the unit 4 Press the MODE button to activate HEAT mode then check whether warm air is blown out from the unit b Press the FAN button and check whether fan speed changes 6 Press the VANE button O and check whether the auto vane operates prop erly 7 Press the ON OFF button to stop the test run Note Point the remote
30. ing and heating operation lt 50 60Hz gt NOTCH SPL dB LINE 40 SEZ KD71VA L External static pressure 15Pa High G Low 30 0 0002 ubar 2 Q N e z z o Q o D NAA Ra ATANA VIVA APPROXIMATE TERESHOLD OF HEARING FOR M NE NOISE z N e e eed a Aen oy del een li 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz 50 60Hz SEZ KD71VA L EL External static pressure 50Pa N 0 0002 ubar Z Ge 4 rd APPROXIMATE Md TERESHOLD OF S HEARING FOR u eus 63 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz 12 INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW SEZ KD25VA L SEZ KD25VA L External static pressure 5Pa 220 240V 50 60Hz External static pressure 15Pa 220 240V 50 60Hz External static pressure Pa External static pressure Pa Airflow rate m min Airflow rate m min SEZ KD25VA L SEZ KD25VA L External static pressure 35Pa 220 240V 50 60Hz External static pressure 50Pa 220 240V 50 60Hz 80 70 60 T T E E 2 50 p D 40 9 I I 30 2 2 ui ui 20 10 0 4 5 6 7 8 9 10 Airflow rate m min Airflow rate m min 13 SEZ KD35VA L SEZ KD35VA L External static pressure 5Pa 220 240V 50 60Hz External static pressure 15Pa 220 240V 50 60Hz 50 40 30 20
31. ion or looseness of indoor 9 Abnormal if indoor controller board Defective transmitting receiving outdoor unit connecting wire of indoor unit or cannot receive any signal normally for circuit of indoor controller board outdoor unit three minutes Defective transmitting receiving Check all the units in case of twin triple E6 Consider the unit as abnormal under the circuit of indoor controller board indoor unit system following condition When two or more Noise has entered into indoor Turn the power off and on again to check indoor units are connected to an outdoor unit connecting wire If abnormality generates again replace outdoor unit indoor controller board indoor controller board or outdoor cannot receive a signal for three minutes controller circuit board from outdoor controller circuit board a Other indoor controller board may have signal which allows outdoor controller defect in case of twin triple indoor unit circuit board to transmit signals system Indoor outdoor unit communication Defective transmitting receiving O Turn the power off and on again to check error Transmitting error circuit of indoor controller board If abnormality generates again replace Abnormal if 1 receiving is detected 30 Noise has entered into power indoor controller board times continuously though indoor controller supply board has transmitted 0 Noise has entered into outdoor control wire Indoor control
32. ler board Defective indoor controller D Replace indoor controller board Abnormal if data cannot be read normally board from the nonvolatile memory of the indoor controller board Remote controller control board D Defective remote controller D Replace remote controller Abnormal if data cannot be read normal ly from the nonvolatile memory of the E1 remote controller control board Error code E1 or E2 Abnormal if the clock function of remote controller cannot be operated normally Error code E2 Water leakage Mis piping of extension pipes Check the extension pipes for mis piping This detection is performed during the When connected with multiple operation stop heating fan or error stop units mode etc other than cooling and dry When a and b are found water leakage Mis wiring of indoor outdoor Check the Indoor outdoor unit connecting occurs unit connecting wire When wire for mis wiring a Pipe lt liquid gt temperature inlet tem connected with multiple units perature lt 10 for 30 minutes b When drain float switch is detected to Detection failure of the indoor Check room temperature display on remote be soaked in the water for 15 minutes unit inlet pipe lt liquid gt ther controller and indoor pipe lt liquid gt tempera or more mistor ture Refer to the countermeasure on P2 When drain float switch is detected to be NOT soaked in the water each Drain pump failure Check if drain up
33. ller board e When LED is blinking check the short cut of remote controller wires e When LED 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 30 xl C O 6 5 TEST POINT DIAGRAM 6 5 1 Indoor controller board SEZ KD25VA L SEZ KD35VA L SEZ KD50VA L SEZ KD60VA L SEZ KD71VA L Fuse 6 3A 250V A 1 1 CAUTION ii wid k Lb abd 1 l I Jj LI i lal i a z ort w i W H 4 i FEE r T JA 3 r Sa al o a E 1 1 ei L LU m 4 s P L ST Li Lho F F k k Por 2 dle R s zT eth TH o ama q s m 1 4 7 rz I Na Im 1 amp S P ay g z T J E gt M kv m n um Ld a AT I rz L _ mr E e IT Ei Um EZ BREST TE 1 V endi T 1 E A k 1 1 pe P E ar 1 1 1 E uir J m EE E EMT TEE Lir IL I Ll a LEN HITS 51 Eu B
34. machine works counting of a and b is cleared Drainage failure When this error is detected the error Clogged drain pump 5 Check drain function will not be reset until the main power is Clogged drain pipe PA reset 2500 Drain float switch failure Check drain float switch Refer to the coun Drain float switch is detected termeasure on P4 and P5 to be soaked in the water ON status due to the operation failure of the moving parts Contact failure of drain float switch connector Loose connector 29 x C O 6 4 TROUBLESHOOTING BY INFERIOR PHENOMENA Note Refer to the manual of outdoor unit for the detail of remote controller Phenomena Cause Countermeasure 1 LED2 on indoor controller board When LED1 on indoor controller board is also off is off Power supply of rated voltage is not supplied to out Check the voltage of outdoor power door unit 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 2 Defective outdoor controller circuit board 2 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 220 240 is detected Check below 3 Power supply of 220 240V is not supplied to indoor Check the voltage between ind
35. n mode Indicates that the timer is off tion of the outcoming airflow Louver display Indicates the action of the swing louver Does not appear if the louver is stationary One Hour Only indicator Displayed if the airflow is set to Low and downward during COOL Temperature Setting or DRY mode Operation varies Power On indicator Shows the target temperature according to model Indicates that the power is on The indicator goes off after one hour at which time the airflow di rection also changes Caution Only the Power on indicator lights when the unit is stopped and power supplied to the unit f you press a button for a feature that is not installed in the indoor unit the remote controller will display the Not Available message If you are using the remote controller to operate multiple indoor units this message will appear only if the feature is not present at the parent unit When power is turned ON for the first time it is normal that PLEASE WAIT is displayed on the room temperature indication For max 2minutes Please wait until this PLEASE WAIT indication disappears then start the operation x C O Wireless remote controller Operation buttons SM MITSUBISHI ELECTRIC ON OFF button Q Hass SET TEMPERATURE button MODEL SELECT J Pushing button starts operation Seal SET TEMPERATURE button sets and Pushing again stops o
36. nector for the outdoor unit s protection device is not connected PEE A E WAT about 2min Only LED 1 is lighted gt LED 1 2 blink e Reverse or open phase wiring for the outdoor unit s power terminal block L1 L2 L3 utes has expired Display messages do not appear 9 following power on Incorrect wiring between indoor and outdoor units even when operation switch is Only LED 1 is lighted LED 1 2 blinks incorrect polarity of S1 82 3 ene anon ONC ee DIMKE Remote controller wire short not light up On the wireless remote controller with conditions above following phenomena takes place No signals from the remote controller are accepted e 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 24 For description of each LED LED1 2 3 provided on the indoor controller refer to the following table LED 1 power for microcomputer Indicates whether control power is supplied Make sure that this LED is always lit LED 2 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 LED 3 communication between indoor and outdoor units Indicates state of communication between the indoor and outdoor
37. on stop dspay of ho outdoor controle Compressor overcurrent interruption Abnormal of power module board Abnormality of super heat due to low discharge temperature 11 Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit Current sensor error Other errors Refer to the technical manual for the outdoor unit 1 If the beeper does not sound again after the initial two 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 If the beeper sounds three times continuously 0 4 0 4 0 4 sec after the initial two beeps to confirm the self check start signal was received the specified refrigerant address is incorrect 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 the unit cannot be operated properly after the test run has been performed refer to the following table to remove the cause Symptom C Wired remote controller LED 1 2 PCB in outdoor unit After LED 1 2 are lighted LED 2 is turned For about 2 minutes after power on operation of the For about 2 minutes PLEASE WAIT off then only LED 1 is lighted Correct remote controller is not possible due to system start up i operation Correct operation Con
38. ontroller circuit board TEST POINT Voc between 1 and 4 of the fan connector Voc DC310 340V TEST POINT Vcc between 5 and 4 of the fan connector Vcc DC15V v Is the normal Yes gt the fan motor Yes OK Check the operation of fan the operation of fan gt END Replace indoor controller board Y NG Replace indoor controller board OK Check the operation gt V NG Replace the fan motor 33 DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts SEZ KD25VA L SEZ KD35VA L SEZ KD50VA L SEZ KD60VA L SEZ KD71VA L 1 Control box 1 Removing the control box cover 1 Remove the two fixing screws on the cover A to remove it Fig 1 Fig 2 2 Thermistor Intake air 1 Remove the control box cover according to the procedure in section 1 1 Pull out the thermistor holder B and thermis tor C on the control box SEZ KD VA model only Fig 3 34 x C O Exercise caution when removing heavy parts 3 Drainpan 1 Removing the filter and the bottom plate 1 Push up the tab on the filter and pull out the filter in the direction of the arrow 1 2 Remove the fixing screws on the bottom plate D E to remove it 2 Removing the drainpan 1 Pull out the drain pan in the direction of the arrow 1 Note e Drain the water out of the drain pan before removing it e To avoid de
39. ontrollers or indoor controller board for three minutes refrigerant address 0 a When RC is displayed E4 Error code E4 Noise has entered into the Remote controllers have no problem eci Turn the power off and on again to check Indoor controller r nnot receiv transmission wire of remote S MASOF CON KONET NOANA If abnormality generates again replace any signal from remote controller for two controller indoor controller board minutes Error code E4 b When is displayed Replace remote controller When RC is displayed d When ERC 00 06 is displayed c d 5 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 Remote controller transmission error E3 signal receiving error E5 D Two remote controller are set Set a remote controller to main and the Abnormal if remote controller could not as main other to sub find blank of transmission path for six In case of 2 remote con seconds and could not transmit 1 trollers Remote controller receives transmitted Remote controller is connected Remote controller is connected with only one data at the same time compares the with two indoor units or more indoor unit data and when detecting it judges Repetition of refrig
40. oor terminal unit block S1 and S2 e When AC 220 240V is not detected Check indoor outdoor unit connecting wire for mis wiring e When AC 220 240 is detected Check 2 below Defective indoor controller board 4 Check the fuse on indoor controller board Check the wiring connection If no problem are found indoor controller board is defective 2 LED2 on indoor controller board When LED1 on indoor controller board is also blinking Check indoor outdoor unit connecting wire is blinking Connection failure of indoor outdoor unit connecting for connection failure wire e When LED is lit Mis wiring of remote controller wires D Check the connection of remote con Under twin triple indoor unit system 2 or more indoor troller wires in case of twin triple indoor units are wired together unit system When 2 or more indoor units are wired in one refrigerant system connect remote controller wires to one of 2 Refrigerant address for outdoor unit is wrong or not those units set 2 Check the setting of refrigerant address Under grouping control system there are some units in case of grouping control system whose refrigerant address is O 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 outdoor Short cut of remote controller wires controller circuit board Defective remote controller Remove remote controller wires and check LED2 on indoor contro
41. peration Ly al 56 55 any desired room temperature AY EL NS m DIEI LIL ON OFF FAN SPEED button AUTO STOP AUTO START button This button is used to set fan speed to Used for selecting timed starting or st low medium or high opping MODE SELECT button This button is used to change between auto cooling heating and drying oper ation modes VANE CONTROL button CHECK button Used to change the airflow direction TEST RUN button Used for setting the current time Used for setting the current time LOUVER button Used for adjusting the airflow direction When using the wireless remote controller point it towards the receiver on the indoor unit if the remote controller is operated within approximately two minutes after power is supplied to the indoor unit the indoor unit may beep twice as the 1 Remove the top cover insert two AAA unit is performing the initial automatic check batteries and then install the top cover The indoor unit beeps to confirm that the signal transmitted from the remote controller has been received Signals can be received up to approximately 7 meters in a direct line from the indoor unit in an area 45 to the left and right of the unit However illumination such as fluorescent lights and strong light can affect the ability of the indoor unit to receive sig Battery installation replacement nals Age batteries f the operation lamp near th
42. r Others Other errors Refer to the technical manual for the outdoor unit EO E3 E5 Remote controller transmission error On wired remote controller D Check code displayed in the LCD 22 __ O f the unit cannot be operated properly after the test run has been performed refer to the following table to remove cause Symptom Cause 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 after 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 Connector for the outdoor unit s protection Only LED 1 is lighted gt device is not connected PLEASE WAIT Error code After about 2 LED 1 2 blink Reverse or open phase wiring for the outdoor minutes has unit s power terminal block L1 L2 L3 A Only LED 1 is lighted gt e Incorrect wiring between indoor and outdoor LED 1 blinks twice units incorrect polarity of S1 S2 S3 LED 2 blinks once Remote controller wire short Display messages do not appear even when operation switch is turned ON operation lamp does not light up On the wireless remote controller with condition above following phenomena take place No signals from the remote controller are accepted Operation lamp is blinking The buzzer makes a s
43. s are few when compressor stops The sound may be bigger than displayed level under actual installation condition by surrounding echoes The sound level can be higher by about 2 dB than the displayed level during cooling and heating operation __ O lt 50 60Hz gt High 33 Middle SEZ KD35VA L External static pressure 5Pa 0 0002 ubar ER TERESHOLD OF HEARING FOR CONTINUOUS ME F 3j pce 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB LLL LLL LAA eee eee lt 50 60Hz gt SEZ KD35VA L External static pressure 35Pa 0 0002 ubar z Q TERESHOLD OF HEARING FOR ours gt n e eo OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB T Legh vor nfo NN loo oe m 1 J 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz lt 50 60Hz gt High 33 Middle SEZ KD35VA L External static pressure 15Pa 0 0002 ubar z Q 5 gt Q TERESHOLD OF HEARING FOR CONTINUOUS en m EF ee 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz gt Q OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB o o LM ALL LL d d eee eee WEAR 50 60Hz SEZ KD35VA L External static pressure 50Pa 0 0002 ubar gt e
44. sure Pa External static pressure Pa 9 10 11 12 13 14 15 16 17 18 19 9 10 11 12 13 14 15 16 17 18 19 Airflow rate m min Airflow rate m min SEZ KD60VA L SEZ KD60VA L External static pressure 35Pa 220 240V 50 60Hz External static pressure 50Pa 220 240V 50 60Hz 80 80 70 70 60 LIII 60 Rated point US 40 Middle TATON Rated lt 1 M 0 EN N 10 11 12 17 18 19 9 10 11 12 13 14 15 16 17 18 19 Airflow rate m min Airflow rate m min 6 C2 External static pressure Pa External static pressure Pa LL LI Ge _ NAL 50 Low 16 SEZ KD71VA L SEZ KD71VA L External static pressure 5Pa 220 240V 50 60Hz External static pressure 15Pa 220 240V 50 60Hz 50 40 6 External static pressure External static pressure Pa 10 0 11 12 13 14 15 16 17 18 19 20 21 11 21 Airflow rate m min Roam SEZ KD71VA L SEZ KD71VA L External static pressure 35Pa 220 240V 50 60Hz External static pressure 50Pa 220 240V 50 60Hz 80 80 60 60 50 50 u ttt lt o 40 o 40 U L E E 7 S 30 30 9 hi AC ue ui TNT iil 0 0 11 12 13 14 15 17 18 19 20 21 11 12 13 14 15 16 17 18 19 20 21 Airflow min Airflow rate m min 17 3 OUTLINES AND DIMENSIONS SEZ KD25VA L Unit mm SEZ KD35VA L
45. units Make sure that this LED is always blinking AUTO RESTART FUNCTION Indoor controller board This model is equipped with the AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller the operation mode set temperature and the fan speed are memorized by the indoor controller board The auto restart function sets to work the moment the power has restored after power failure then the unit will restart automatically Set the AUTO RESTART FUNCTION using the wireless remote controller Mode no 1 25 Ooo O Note Refer to the manual of outdoor unit for the details of display 6 3 SELF DIAGNOSIS ACTION TABLE such as F U and other E Room temperature Defective thermistor Check resistance value of thermistor thermistor TH1 characteristics D The unit is in three minute resume Contact failure of connector prevention mode if short open of 20 on the indoor controller thermistor is detected Abnormal if the board Insert failure unit does not reset normally after three Breaking of wire or contact minutes The unit returns to normal failure of thermistor wiring operation if it has normally reset Defective indoor controller Constantly detected during cooling board drying and heating operation Short 90 C or more P1 Open 40 or less Pipe temperature D Defective thermistor thermistor Liquid TH2 characteristics D The unit is in three minute resume 2 Contact fail
46. ure of connector prevention mode if short open of CN44 on the indoor controller thermistor is detected Abnormal if the board Insert failure unit does not reset normally after three 5 Breaking of wire or contact minutes The unit returns to normal failure of thermistor wiring operation if it has normally reset Defective refrigerant circuit is 2 Constantly detected during cooling causing thermistor temperature P2 drying and heating except defrosting of 90 or more or 40 C or operation less Short 90 C or more Defective indoor controller board Open 40 C or less Contact failure of drain float switch CN4F Contact failure of connector D Check contact failure of float switch connec Extract when the connector of drain float Insert failure tor 30 C 4 3 0 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 2 Check contact failure of connector CN20 on the indoor controller board Refer to 6 5 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 Check resistance value of thermistor For characteristics refer to P1 above 2 Check conta
47. w condensation use insulated screws in the places marked with circles in Fig 6 Insulation material Fig 6 35 x C O Exercise caution when removing heavy parts 4 Thermistor Condenser evaporator Liquid pipe 1 Remove the drain pan according to the proce dure in section 3 2 Removing the Heat exchanger cover 1 Remove the four fixing screws on the heat exchanger cover F to remove it Fig 7 3 Removing the thermistor 1 Remove the thermistor G from the thermistor holder H on the copper tube Thermistor size Liquid pipe 8mm Condenser evaporator Fig 8 36 x C O Exercise caution when removing heavy parts 5 Fan and fan motor 1 Removing the filter and the bottom plate 1 Push down the tab on the filter and pull out the filter in the direction of the arrow 1 2 Remove the fixing screws on the bottom plate J to remove it Fig 9 2 Removing the fan casing bottom 1 Squeeze the tabs on the fan casing to remove it in the direction of arrow 2 3 Removing the motor cable 1 Remove the motor cable threw the rubber bush 4 Removing the fan motor and the Sirocco fan 1 Remove the two motor fixing screws to remove the motor and the Sirocco fan in the direction of arrow 3 2 Remove the four fan case fixing screws to take the top half of the fan casing off xl C O Exercise caution when removing heavy parts 6 Bearing KD50 60 7
48. wiring matching terminal numbers S1 S2 S3 3 Symbols used in wiring diagram above are Terminal Block 20 5 REFRIGERANT SYSTEM DIAGRAM SEZ KD25VA L SEZ KD35VA L SEZ KD50VA L SEZ KD60VA L SEZ KD71VA L Strainer 50 Refrigerant GAS pipe connection Flare Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection Condenser evaporator temperature thermistor Flare LO Pipe temperature Room temperature thermistor liquid thermistor TH1 TH2 T Strainer Distributor 50 21 6 TROUBLESHOOTING 6 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the followings D Check the power supply voltage Check the indoor outdoor connecting wire for mis wiring 2 Take care the followings during servicing D 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 3 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires x Q Lead wires Housing point 6 2 SELF CHECK FUNCTION Wired remote controller 60 1 Turn on the power 2 Press the CHECK button twice 3 Set refrigerant address with
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