Mitsubishi Electric MJ-E14CG-S1-IT Service Manual
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Mitsubishi Electric MJ-E14CG-S1-IT Service Manual

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DEHUMIDIFIER
SERVICE MANUAL
MJ-E14CG-S1-IT
Model
CONTENTS
1.
2.
3.
4.
5.
6.
7.
8.
9.
2013
No.MJW-E-12060
Sold from 2013
2
3
5
5
6
8
9
10
11
18
19
21
22
24
32

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Summary of Contents for Mitsubishi Electric MJ-E14CG-S1-IT

  • Page 1: Table Of Contents

    2013 DEHUMIDIFIER SERVICE MANUAL No.MJW-E-12060 MJ-E14CG-S1-IT Model Sold from 2013 CONTENTS Precautions Names and Functions of Parts Specifications Outer Dimensions Wiring Diagram Function Technical Points Precautions for failure diagnosis Troubleshooting Procedure 10. Troubleshooting 11. Maintenance 12. Service Checklist 13. Precautions for Disassembly and Reassembly 14.

  • Page 2: Precautions

    Note) This page is extracted from the instruction manual. 1. Precautions...

  • Page 3: Names And Functions Of Parts

    Note) This page is extracted from the instruction manual. 2. Names and Functions of Parts...
  • Page 4 Note) This page is extracted from the instruction manual.

  • Page 5: Specifications

    Note) This page is extracted from the instruction manual. 3. Specifi cations 4. Outer Dimensions...

  • Page 6: Wiring Diagram

    5. Wiring Diagram 1) Wiring Diagram Operation control board Sensors (Humidity and room P200 P201 temperature sensing) P100 P101 1℃ (defrost)/12℃ (end) Blue Thermistor (Tube White Brown temperature sensing) Power control board Power plug White Gray Stepping motor Run capacitor Gray Gray Float switch...
  • Page 7 2) Board Diagram [Power control board] [Operation control board]...

  • Page 8: Function

    6. Function ■ Function List Operation mode Dehumidifying operation Compressor Blower fan Solenoid valve Swing louvre Power Intelligent Lamps Air Purifier Full Drying inside Humidity (set/current) Operation mode Swing area Swing monitor Off/on timer Mildew guard Defrost Low temp Child lock Power Selection Mode...

  • Page 9: Technical Points

    7. Technical Points ■ Coolant Circuit φ6.35 Compressor Coolant flow Dehumidifying φ5 Defrosting φ5 φ6.35 Tube temperature φ6.35 sensing thermistor Solenoid valve Intake Blow (closed when dehumidifying and open when defrosting) Capillary tube Humidity sensor φ5.0×φ4.0 Room temperature sensing thermistor φ6.35 φ6.35 Capillary tube...

  • Page 10: Precautions For Failure Diagnosis

    8. Precautions for failure diagnosis The following precautions should be observed in order to perform troubleshooting safely and correctly. The following diagrams indicate circumstances where danger can result from mishandling the unit. WARNING Mishandling may result in fatal or serious injury, or fire. CAUTION Mishandling may result in minor or damage to your home or property ,etc.

  • Page 11: Troubleshooting Procedure

    9. Troubleshooting procedure 1) Failure diagnosis flowchart Are error codes Refer to “Error Indications and displayed? CorrectiveActions,” and follow “E0” “E1” “E7” “E8” the procedures. “A1” “A2” “A3” “A6” “P4” Does the power lamp light Check the continuity of power cord. Replace the power cord.
  • Page 12 Does the compressor operate? Is the operating environment Dehumidification may not be low temperature? possible in low temperature (less than 2°C) environments. (The compressor does not operate by detecting abnormal low temperature) Insert the connector Check if there is no disconnection and connector pins or contact failure of the connector securely.
  • Page 13 Check if there is no disconnection Insert the connector Does the solenoid valve operate? or contact failure of the connector and connector pins (Shorten J301 and J302) ( P3 ) and connector pins of power securely. control board. Check the resistance of the Replace the solenoid valve coil.
  • Page 14 Only a small quantity of Is the operating environment Dehumidication may not be water is dehumidified. low humidity and low possible in low humidity and temperature? low temperature environments. Explain the performance curve on P9. Is there any dust on the room Remove the dust from the room temperature and humidity sensor? temperature and humidity sensor.
  • Page 15 2) Simple Check Table for Main Parts Component name Testing procedure Detach the connector and measure the resistance using a multimeter (component temperature: 10 to 30 ℃ ℃ Tube temperature Normal Abnormal sensing thermistor Between P11 pins: 8.0kΩ to 20.8kΩ Open or shorted Detach the connector and measure the resistance using a multimeter Room...
  • Page 16 3) Error Indications and Corrective Actions Indication Error (failure) Corrective action (Timer display) P10 connector out of position Room temperature thermistor blowout Check the P10 connection. Check the room temperature and humidity sensor Room temperature thermistor short board. Room temperature and humidity sensor board failure P11 connector out of position Tube temperature thermistor blowout...
  • Page 17 (2) LED, LCD and fan tests ① Start: Press the MODE and HUMIDITY SELECTION buttons simultaneously 4 times when the power is off. Press the POWER button within 2 seconds. ② Mode select: Use the OFF/ON TIMER button to change the diagnosis mode (0 - 5). Room Tube Current...

  • Page 18: Troubleshooting

    10. Troubleshooting Note) This page is extracted from the instruction manual.

  • Page 19: Maintenance

    11. Maintenance Note) This page is extracted from the instruction manual.
  • Page 20 Note) This page is extracted from the instruction manual.

  • Page 21: Service Checklist

    12. Service Checklist ( 1 ) Points to be checked after completing repairing After completing repairing, check the all items below to prevent re-repair. Check items Check Was the proper tool used? Are the parts on the parts catalog used? Verify that there is no problem in the lead wire (layout and connection) and/or clamp.

  • Page 22: Precautions For Disassembly And Reassembly

    13. Precautions for Disassembly and Reassembly The following precautions should be observed in order to perform disassembly and reassembly safely and correctly. The following diagrams indicate circumstances where danger can result from mishandling the unit. WARNING Mishandling may result in fatal or serious injury, or fire. CAUTION Mishandling may result in minor or damage to your home or property etc.
  • Page 23 CAUTION Wear protective gloves. Keep children away. Wear gloves Keep away Failure to do so may result in injuries Failure to do so may result in by the edge of metal, electric shock, electric shock and/or injuries when moving and/or burns caused by contact with hot section. the unit or using a measuring device.

  • Page 24: Disassembly And Reassembly Hints

    14. Disassembly and Reassembly Hints 【Precautions for disassembly】 (1)Removing the water tank ① ①Open the front door and pull out the water tank. Main unit Water tank (2)Removing the front panel and air filter ①Push the front panel downward, and ①...
  • Page 25 (3)Removing and replacing the front casing assembly ①Remove the water tank. Special setscrews ③ （Reference:(1)Removing the water tank) ②Removing the front panel assembly and ④ ④ Catch(left side:1) Catch(left side:1) Catch(Right side:1) Catch(Right side:1) air filter. panel and air filter) ③...
  • Page 26 (5)Removing and replacing the power control board Remove all connectors ①Remove the power control board box lid. Power control board from the power control board ② front casing assembly) ②Remove all connectors from the power control board to remove the power control control board) (6)Removing and replacing the condenser for compressor and tube temperature thermister ①Remove the power control board box lid.
  • Page 27 (8)Removing and replacing the stepping motor and temperature/humidity sensor ① ② (7)Removing the rear casing) Connector(P10) ③ ②Remove the connector P20 and stepping Connector(P20) motor setscrews(2) to remove the stepping stepping motor) Stepping motor setscrews ③Remove the connector P10 and tape to ②...
  • Page 28 (10)Removing and replacing the blower fan and blower fan motor Blower fan ①Removing the rear casing. Blower fan Blower fan locknut guide casing Tape ③ ③ casing) ④ ②Remove the power control board. replacing the power control board) ③Remove the blower fan locknut(1) to remove the blower fan.
  • Page 29 (12)Removing and replacing the float switch ①Remove the blower fan assembly. Drainpan assembly Heat exchanger assembly ② ②Remove the float switch form the drainpan Float switch (13)Removing the drainpan ①Remove the blower fan assembly. ③ Rear side of the drainpan assembly Rear side of the drainpan assembly ②Separate all the lead wires from the clampers on the drainpan assembly.
  • Page 30 (14)Removing and replacing the compressor/heat exchanger assembly ①Remove the drainpan assembly. Heat exchanger assembly ② drainpan assembly) ③ ②Put a support under the right side Remove the compressor setscrews ③Remove the compressor and heat Drainpan assembly the compressor/heat exchanger) Compressor Base <Compressor part:wiring layout>...

  • Page 32: Parts Catalog

    15. Parts Catalog Model MJ-E14CG-S1-IT Exploded View <Casing and Structure> magnifing picture...
  • Page 33 Model MJ-E14CG-S1-IT Parts List <Casing and Structure> Notes: 1. Circled reference numbers indicate performance parts. 2. New parts and the parts that are used only with these models lack compatibility. 3. Those parts that are marked by are of critical importance for sustaining safety and performance. Use specified parts atreplacement.
  • Page 34 Model MJ-E14CG-S1-IT Exploded View <Casing and Structure>...
  • Page 35 Model MJ-E14CG-S1-IT Parts List <Casing and Structure> Notes: 1. Circled reference numbers indicate performance parts. 2. New parts and the parts that are used only with these models lack compatibility. 3. Those parts that are marked by are of critical importance for sustaining safety and performance. Use specified parts atreplacement.
  • Page 36 Model MJ-E14CG-S1-IT Exploded View <Electrical Parts>...
  • Page 37 Model MJ-E14CG-S1-IT Parts List <Electrical Parts> Notes: 1. Circled reference numbers indicate performance parts. 2. New parts and the parts that are used only with these models lack compatibility. 3. Those parts that are marked by are of critical importance for sustaining safety and performance. Use specified parts atreplacement.
  • Page 38 Model MJ-E14CG-S1-IT Exploded View <Compressor Parts> 412 418 back...
  • Page 39 Model MJ-E14CG-S1-IT Parts List <Compressor Parts> Notes: 1. Circled reference numbers indicate performance parts. 2. New parts and the parts that are used only with these models lack compatibility. 3. Those parts that are marked by are of critical importance for sustaining safety and performance. Use specified parts atreplacement.

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