Mitsubishi MJ-EZ6CX-S1-IT Service Manual Download Page 18

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Replace the power control board.

Replace the blower fan motor.

Replace the operation control board.

Replace the power control board.

Does the blower fan motor
rotate?

YES

Stepping motor (louvre)

does not operate.

Check the float switch.

●

Check if there is no disconnection or

contact failure of the connector (P12) and
connector pins of operation control board.

●

Check the continuity between connecter (P12)

terminals when the water tank is equipped.

Normal … Tank full : open

Empty:short

Replace the float sensor.

Check if there is no disconnection or
contact failure of the connector (P6) and
connector pins of power control board.

Check the resistance of the blower fan
motor.
Normal : Between pin1 and pin5 430-490

Abnormal:Between pin1 and pin5 open or short

Insert the connector and
connector pin securely.

Is the swing louvre switch “OFF”?

Check if there is no disconnection or
contact failure of the connector (P8)and
connector pins of power control board.

Check the resistance between connector
pins of the stepping motor.

Normal : Terminal 1-2

Terminal 1-3
Terminal 1-4 342-418

Terminal 1-5

Abnormal:Each interval is open or short

Normal

Does the swing direction of
the louvre change to“wide”,
“ front ” , o r ”upward” ?

Replace the stepping motor.

Insert the connector and connector
pin securely if there are any defects.

YES

Does it dehumidify?

YES

Is there any clog or dust on the
filter ?

Does the zeolite rotate?

YES

Clean the filter.

Are any foreign objects caught
in the gear ring?

Does the rotor motor rotate?

Remove the foreign object
from the gear ring.

Check if there is no disconnection or
contact failure of the connector (P7)and
connector pin of power control board.

Check the continuity of the rotor motor.

Normal:Between the pin1 and pin3

2-4 k

Abnormal:Between pin1 and pin3

Open or short

Check if there is no disconnection or
contact failure of the connector (P14)
and connector pins of the photo
interrupter and power control board.

Insert the connector and
connector pin securely.

Replace the power control board.

NO Replace the rotor motor.

Summary of Contents for MJ-EZ6CX-S1-IT

Page 1: ...ntrol panel Accessories 4 3 Specifications 6 4 Outer Dimensions 6 5 Wiring Diagram 7 6 Function 8 7 Technical Points 11 8 Time Charts 12 9 Circuit Diagram 14 10 Precautions for failure diagnosis 16 11 Troubleshooting Procedure 17 12 Troubleshooting 28 13 Maintenance 30 14 Service Checklist 32 15 Precautions for Disassembly and Reassembly 33 16 Disassembly and Reassembly Hints 35 17 Parts Catalog 4...

Page 2: ...s turned off Remove the power plug after the blower fan has stopped Do not put the unit near heat generating devices such as stoves fan heaters etc The plastic parts may melt and cause fire Do not put your fingers or any long object into the air intake outlet Do not touch the swing louvre The internal fan rotates at high speeds and such actions may result in injury or malfunctions Do not attempt t...

Page 3: ...ock or fire Before cleaning the unit wait until the blower fan stops after operation has stopped and then remove the power plug When the unit is on the internal fan rotates at high speeds and may cause injury Do not cover an air outlet or air intake with laundry cloth curtain etc This results in poor ventilation and may cause heat generation fire Do not put vases or any other objects filled with w...

Page 4: ... the unit with caution in rooms where the walls furniture and art work are vulnerable to dry air as it may cause cracks and warping Keep the unit always in an upright position Inclining the unit may cause water in the tank to leak into the unit resulting in malfunction Should you incline the unit accidentally contact the place of purchase for advice Do not carry the unit horizontally This may resu...

Page 5: ...smoke such as carbon monoxide cannot be removed with this ﬁlter POWER lamp Lights during operation POWER switch Turns the power on off CLEAN FILTER lamp Flashes or lights to notify you that it is time to clean the ﬁlter RESET switch Cancels the ﬂashing or lit state of the CLEAN FILTER lamp Control panel FULL lamp Lights when the tank is full Lights when the tank is not attached to the unit OFF TIM...

Page 6: ...4 hours Standby power approximately 1W S1 IT X C 6 Z E J M l e d o M z H 0 5 V 0 3 2 e s a h p e l g n i S y l p p u s r e w o P y a d L 0 6 y t i c a p a c g n i y f i d i m u h e D Power consumption 590W H G I H 305W W O L Operating sound B d 7 3 6 4 W O L H G I H dB 9 4 y r d n u a L Water tank capacity stops automatically at approx 2 4L g k 0 7 t h g i e W Dimensions H W D 485mm 190mm 324mm No...

Page 7: ... White White White White White White White White White White Black White Orange Frame thermal fuse Heater Rotor motor Heater thermal fuse Dryer fan motor Blower fan motor Photo Interrupter Frame thermistor Float switch Heater thermistor Room temperature humiditysensor Stepping motor Operation control board 1 Wiring Diagram 2 Board Diagram Operation control board Power control board 5 Wiring Diagra...

Page 8: ...ing Off Deo dry Off Tank full Clean filter Roomtemperatureanomaly HT HEX Temperature anomaly Temperature conditions Humidity conditions Blower fan Heater Dryer fan Blower fan Heater Dryer fan Heavy load conditions 35Υ or more Humidity less than 40 Rank 4 Lo ON Rank 2 Lo ON Normal load conditions 35Υ or less Humidity 40 or more Rank 3 Hi ON Rank 1 Lo ON ې 㸯Lighting operable 㸢㸯Lighting depending on ...

Page 9: ...o Control Summary Intelligent Laundry Control Summary a The dehumidifying time changes depending on the humidity temperature and time b The time when the humidity changes is measured and dehumidifying operation is automatically stopped when the laundry is dry 1 12 hours Deo dry Control Summary a Odors are removed by heating the clothes 60 minutes 2minutes 2minutes Deo dry sw a The operation is shi...

Page 10: ...room b The dehumidifying time changes depending on temperature and humidity and it stops automatically Minimum 4 hours Maximum 12 hours c The direction of louvre automatically changes depending on the humidity temperature and time Target part Operation Heater ON Blower fan Hi Dryer fan Hi Louvre Wide Front Minimum operating time 20Υ or more 4 hours Less than 20Υ 6 hours Lo B Lo A Hi HH Dehumidifyi...

Page 11: ...ation is performed with the power consumption of the heater reduced to a level equivalent to that of LOW mode The blown air may cause smell during operation An odor may be emitted from the parts inside the dehumidiﬁer when you ﬁrst use the dehumidiﬁer Odorants that cannot be removed by the silver ion ﬁlter may be absorbed by the dehumidiﬁer rotor inside the unit Odors unique to zeolite sour smell ...

Page 12: ...Deo dry lamp lighting Bathroommildewguardlamplighting ON OFF 2Sec 2Sec 2Sec 2Sec ON OFF Open Close ON OFF 40㨪120 Sec Continuous low Low Continuous high High Deo dry State Operation Mode Indications Tank full lamp Blower fan Dryer fan Rotor Louvre Heater for high and low Heater for high Operation ON Mode ON Mode ON Dehumidifying ON Bathroom mildew guard Bathroommildewguard ON Intelligent laundry In...

Page 13: ... lighting 2Hr elapsed 2Hr elapsed OFF timer ON OFF timer ON State Operation Mode Indications Blower Dryer fan Rotor Louvre Heater for high and low Clean filter OFF timer operation Filter reset No lamps are lighting After blow 120 seconds Alarm Alarm Alarm Alarm 4Hr lamp lighting 40㨪120 Seconds Deo dry OFF ON ON OFF OFF ON Open Close Deo dry lamp lighting Mode ON 30 minutes elapsed 30 minutes elaps...

Page 14: ...3k2 50V 10u C13 16V 47u C10 D7 1A600V L2 C13 FR D6 EG1A C14 R39 10k 12V 1 2 1SS133 D12 RY1 G5CA E TR3 2SC5395 5V 5V PHOTO INTERRUPTER ＰＨ 3 P14 3 2 1 R68 4 7k R69 24k 300 R70 12V 1 2 1SS133 D13 RY2 G5CA E TR4 2SC5395 1SS133 D20 RY4 G5CA E DTR6 RN2206 DTR5 RT1N234S 1SS133 D14 RY3 G5NB 1 4 R7 1 2W750 PC1 AQH3223 SSR1 AQG12212 2 3 3 4 12V D15 C5 NON INSERT BLK 225Ｗ 325Ｗ Hi Hi Low TR1 2SC5395 25V 1000...

Page 15: ...3 2 1 TEMP HUMI SENSOR C40 103 C31 103 C32 103 4 7k R60 4 7k R61 R28 1k R59 1k 11 27 10 26 29 28 5V 5V R53 33k2 R54 33k2 5V 5V 3 9k R55 PH 6 P10 PH 6 P20 FLOAT P12 XA 2 P13 XH 2 P11 EH 2 THERMISTOR HEATER THERMISTOR FRAME 5V C37 103 BZ1 2 4k R27 1 2 4 5 6 1 4 3 2 3 5 6 EEPROM 5V R18 22k R17 22k R19 820 5V Vcc Vss WP A0 A2 SDA SCL 6 5 8 4 7 3 2 1 IC5 OFF TIMER KEY1 SWING KEY2 DEHUMI KEY3 MODE KEY4 ...

Page 16: ...sing Failure to do so may cause combustion generation of smoke and or malfunction When performing work with the power on be careful not to touch the live part This may cause electric shock Do not work with wet hands This may cause electric shock After the work lay the wire out as it was before Failure to do so may cause combustion generation of smoke and or malfunction Wear protective gloves Failu...

Page 17: ... Check the float NG OK OK OK Check the float Is the float switch coming off or attached upside down Is the float movement smooth Is a magnet attached to the float NG YES Check if there is no disconnection or contact failure of the connectors P10 and P21 of power control board are securely joined to the connectors P20andP31 ofoperationcontrolboard Verify that no connector pin is off Check if connec...

Page 18: ...or P8 and connector pins of power control board Checktheresistancebetweenconnector pins of the stepping motor Normal Terminal 1 2 Terminal 1 3 Terminal 1 4 342 418ǡ Terminal 1 5 Abnormal Eachintervalisopenorshort Normal Does the swing direction of the louvre change to wide front or upward Replace the stepping motor Insert the connector and connector pinsecurelyifthereareanydefects NO NO NO YES YES...

Page 19: ...yer fan motor Normal Betweenthepin1andpin4 370 405Ω Abnormal Betweenpin1andpin4 Open or short Replace the rotor motor NG OK OK NG NG Replace the operation control board NG OK OK OK OK OK OK OK NG NG NG OK NG NG NG OK Check if there is no disconnection or contact failure of the connector P2 and connector pins of the power control board Check if there is no disconnection or contact failure of the co...

Page 20: ...hermistor Does it dehumidify YES NO NO OK YES YES NG YES OK NO OK OK OK Is Auto operation selected Dehumidifying Auto Intelligentlaundry Deo dry bathroom mildew guard OFF timer Change the operation mode to dehumidifying High Does it work 1 Dehumidifying Auto Blower fan stops when temperature is 27 or less and current humidity is 1 of set humidity or less 2 Intelligent laundry It stops in a minimum...

Page 21: ...oom mildew guard OFF timer The unit stops working in the middle of operation It is normal The unit can operate in a room temperature range of 1 35 When the room temperature is less than1 dehumidified water freezes and it hinders dehumidifying When the room temperature is more than 35 internal temperature of the unit rises which activates the protective device Fan operation takes the place of dehum...

Page 22: ...lso that absorbed odor will be heated by the heater which may result in a burning like smell or other abnormal odor e g cigarettes cosmetics hair dressing products building materials new furniture etc Explain to the customer that the unit is normal Does the zeolite discolour to brown In the zeolite system the zeolite absorbs every odor with moisture in the room Usual absorbed odor is resolved by t...

Page 23: ...normal Open or short Detach the connectors P11 P13 and measure the resistance using a multimeter Component temperature 10 to 30 Measure the resistance between terminals using a multimeter Winding temperature 10 to 30 Measure the resistance between terminals using a multimeter Winding temperature 10 to 30 Detach the connector P9 and measure the resistance using a multimeter Component temperature 10...

Page 24: ...board Microcomputer IC1 failure Replace power control board Microcomputer IC1 failure Replace power control board Damage to photo interrupter Room temp humidity sensor 1 Disconnection of temp humidity sensor lead wire 2 Failure in soldering of sensor board 3 Connector contact failure Remove P9 P10 Betweenpin3andpin4 47k 51kΩ Frame heater thermistor 1 Contact failure of operation control board 2 Sh...

Page 25: ...n4andpin7 Both 180 200Ω Short circuit of frame thermistor Rotor lock Disconnection of dryer fan Rotor motor 1 Contact failure of operation control board connector 2 Part failure Does the rotor rotate If YES 1 Contact failure of photo interrupter connector P14 2 SUB ASSY failure Part failure assembly failure Dryer fan does not rotate 1 Is the fan locked 2 Contact failure of connector P5 Dryer fan d...

Page 26: ... displayed 4 Self Diagnostic Test Program 5 Demo Program 6 Error History Display Start Press the mode switch and the dehumidifying switch 7 times together when power is off Turn on the power within 2 seconds Alternatively turn on the power with the swing louvre switch pressed Operational content operation without heater continuity Release Remove the power plug Start Press the mode switch and the d...

Page 27: ... is 32Bit 4 digits and its ten s and hundred s places are displayed Off timer switch data 4 air amount decreases Swing louvre switch data 4 air amount increases Mode 6 Dryer fan phase data indication and setting All indications are displayed by hexadecimal Blower fan heater is 16Bit 2 digits Off timer switch data 1 air amount decreases Swing louvre switch data 1 air amount increases Mode 7 Model s...

Page 28: ...ion ﬁlter air intake and sensor Clean them as described in Maintenance and then reset the lamp by pressing the RESET switch until you hear a beep Has the room temperature become high approximately 40 C or more Operation sometimes stops to prevent the temperature inside the unit from rising Reset the lamp by pressing the RESET switch until you hear a beep Is the air intake or air outlet blocked Rem...

Page 29: ...bed by the dehumidiﬁer rotor inside the dehumidiﬁer Also that absorbed odor will be heated by the heater which may result in a burning like smell or other abnormal odor Examples Cigarettes cosmetics hair dressing products building materials new furniture etc The unit produces an odour Check to see if the unit is on a slope or uneven surface Move to a sturdy even surface Check to see if the silver ...

Page 30: ...en the CLEAN FILTER lamp ﬂashes or lights 1 2 3 4 5 6 Resetting the CLEAN FILTER lamp Clogging with dust and the like reduces the effectiveness of the dehumidifying Clean once every two weeks Insert the power plug in a power socket Press the RESET switch until you hear a beep for approximately 3 seconds Remove any dust from the white net surface with the nozzle of a vacuum cleaner Do not use a noz...

Page 31: ... lukewarm water for about 30 minutes Dry the silver ion filter well Once Every Three Months Dry the ﬁlter on a ﬂat surface Any yellow or dark stains may remain on the ﬁlter but should not affect performance The ﬁlter can be soaked for a total of eight times After that replace with a new ﬁlter Set the silver ion filter into the filter cover Set the filter cover Remove any dust from the white net su...

Page 32: ... that there is no defect such as lead wire caught in other parts damage and or intermediate connection Verify that there is no defect such as deteriorated or damaged power cord and or intermediate connection Verify that there is no slack and or damage to power cord Are the connectors and metal terminals inserted securely Verify that there is no abnormal sound of the motor etc If electrical parts a...

Page 33: ...d or lead wire This may cause fire combustion and or electric shock Use appropriate tools Failure to do so may result in an accident caused by contact failure or loose parts Do not alter the product This may cause fire electric shock and or injuries Do not touch a rotating object until it completely stops The rotating object may catch your hand etc and result in injuries Check the wiring diagram b...

Page 34: ... properly and the unit operates without a problem Safety precautions for the inspection and service Keep away Wear gloves CAUTION Wear protective gloves Failure to do so may result in injuries by the edge of metal electric shock and or burns caused by contact with hot section Do not put the unit where it may burn This may cause fire or combustion Perform operation check after reassembly Failure to...

Page 35: ...per part of the filter cover toward you and then detach the catches 2 to remove the filter cover Remove the left case setscrews 5 Remove the left case setscrews 2 from the bottom of the unit Detaching the fitting 1 of the left and right cases to remove the left case Removing the left case Pull out the water tank Reference Removing the water tank Remove the left case Reference Removing the left cas...

Page 36: ...Reference Removing the left case Remove the front and back cover Remove the catches 2 which fix the switch holder from the louvre side of the right case with a slotted screwdriver Remove the switch holder Remove the operation control board setscrews 3 and all the connectors of the operation control board Removing and replacing the operation control board 4 Removing and replacing the operation cont...

Page 37: ...ing 4 of the plug cord holder to remove the plug cord Removing and replacing the plug cord Point at reassembly The plug cord should be attached to the plug cord holder as shown in the Pic Ԛ Pull out the water tank Reference Removing the water tank Remove the left case Reference Removing the left case Remove the operation control board Reference Removing and replacing the operation control board Re...

Page 38: ...wer control board Reference Removing and replacing the power control board Pull out the sensor control board from the unit Removing and replacing the sensor board Remove the rotor thermistor setscrew 1 to remove the rotor thermistor Removing and replacing the rotor thermistor Remove the rotor fuse holder set screw 1 to remove the rotor fuse Removing and replacing the rotor fuse Point at reassembly...

Page 39: ...emove them Remove the rotor motor Removing and replacing the rotor motor Points at reassembly Put the rotor motor in the motor case and mount it on the frame Engage it with a gear of the zeolite at this point Remove the right case Reference Removing the right case Remove the blower fan holder setscrews 3 to remove the blower fan holder Remove the blower fan setnut 1 to remove the blower fan Removi...

Page 40: ...dryer fan case Remove the dryer fan Removing and replacing the dryer fan Remove the dyer fan motor setscrews 2 from the inside of the dryer fan case Remove the dryer fan motor Removing and replacing the dryer fan motor Points at reassembly Coat the inside of the dryer fan case from end to end with silicon to keep it sealed Fix the dyer fan motor cover setscrew before the silicon sets Remove the ri...

Page 41: ...rotor holder from the back side and remove the zeolite setscrew 1 while stopping the rotor motor moving together with the setscrew Note The rotor holder is also detached when the zeolite is removed so be careful not to lose it Reference Remove the blower fan holder Reference Removing and replacing the blower fan blower motor Remove the drain pan Reference Removing and replacing the float switch Re...

Page 42: ...d replacing the zeolite heater assembly Remove the frame S setscrews 2 Insert a slotted screwdriver between the frame and frame S and detach the catch a Lift up the frame S sheet metal side and detach the catch b to remove the frame S Removing and replacing the frame S Point at reassembly When attaching the frame S to the frame set the pins 2 in the right place and attach the catches a b securely ...

Page 43: ...Remove the frame S Reference Removing and replacing the frame S Detach the catches 4 which fix the photo interrupter from the frame to remove the photo interrupter Removing and replacing the photo interrupter plug 17 Removing and replacing the photo interrupter 43 ...

Page 44: ...S1 IT Model Structural Disassembly Diagram Case and tank structural relationship 17 Parts Catalog A 122 119 120 121 101 103 102 104 105 106 111 110 107 113 114 112 108 109 118 117 124 123 C 116 115 B A 125 a 44 ...

Page 45: ...25 A B C Z70CX Z70CX Z70CX H100CX Z70CX Z70CX Z70CX Z70CX Z70AX Z70CX Z70CX Z70BX Z70BX EZ6CX H EZ6CX H EZ6CX H NJ SX10 Z70CX Z70CX Z70CX EZ6CX H EZ6CX H Z70CX 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 5 3 3 expendable item M22 B49 345T M22 B49 320T M22 B49 321T M22 B46 340 M22 B49 330 M22 B49 320F M22 B49 320B M22 B49 320C M48 5C5 821 M22 B49 311L M22 B49 310R M22 B42 320K M22 B42 320...

Page 46: ...isassembly Diagram Zeolite and warm air heater structural relationship C G H D J K 208 218 220 221 222 223 227 229 230 219 210 225 228 203 205 207 E B 211 212 213 A A 204 209 234 I 226 224 231 232 233 214 215 217 216 201 202 206 F a 46 ...

Page 47: ...1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 2 4 2 2 2 3 3 1 M22 B49 705 M22 B54 300 M22 C68 506 M22 C68 555 M22 B34 8491 M22 B49 202 M22 B34 884 M22 B34 527 M22 B34 887 M22 C68 350 M22 B54 100 M22 B54 111 M22 C68 620R M22 B34 834 M22 B58 100 M22 B34 265 M22 C74 620 M22 B54 389 M43 950 411 M22 B49 119 M22 B54 311 M22 C68 620 M22 C68 607 M22 B34 9011 M22 B34 9012 M22 C68 555H M22 B...

Page 48: ...m Fan and control panel structural relationship 301 308 309 310 311 315 316 317 318 319 320 321 322 323 304 305 306 307 C D E 324 G 327 302 F 303 326 325 313 314 312 Caution Do not cover the hole of drainpan for overflow This may cause water leakage 48 ...

Page 49: ...D E F G Z70CX Z70CX EZ6CX S1 E16VX Z70CX Z70CX Z70CX Z70DX Z70DX Z70WX Z70EX E16VX EZ6CX H EZ6CX S1 Z70AX 100SX Z70CX Z70CX EZ6CX H Z70CX Z70CX H100AX NJ SX10 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4 2 1 4 2 4 2 M22 B49 300 M22 B49 390 M22 C70 340 M22 C44 501 M22 B49 150 M22 B49 261S M22 B49 128 M22 B54 310 M22 C74 689 M22 B54 311P M22 B34 266 M22 B58 119 M22 C44 260 M22 C68 620M M2...

Page 50: ...Issued in 2010 7 ...

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