Mitsubishi MJ-E26VX-A1 Service Manual

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ADVANCED AND EVER ADVANCING

MITSUBISHI ELECTRIC

DEHUMIDIFIER

2005

SERVICE MANUAL

MJ-E26VX-A1Model

Sold from 2005

CONTENTS

1. PRODUCT SPECIFICATIONS........................................................................................ 2

2. OUTER DIMENSIONS .................................................................................................... 3

3. TIPS ON DEHUMIDIFYING............................................................................................. 3

4. EXTERNAL VIEW, PARTS AND DISPLAY SECTION................................................. 4 ~ 8

5. TECHNICAL POINTS.................................................................................................. 9 ~ 11

6. MAINTENANCE ......................................................................................................... 12 ~ 14

7. WIRING DIAGRAM AND BLOCK DIAGRAM

7.1 Wiring Diagram....................................................................................................... 15

7.2 Function List ....................................................................................................... 16 ~ 19

7.3 Timing Charts ..................................................................................................... 20 ~ 23

7.4 General Block Diagram ...................................................................................... 24 ~ 25

8. TROUBLESHOOTING PROCEDURE

8.1 Troubleshooting flowchart ................................................................................. 26 ~ 27

8.2 Key Component Check Procedures ....................................................................... 28

8.3 Error Indications and Corrective Actions ............................................................... 29

8.4 Self-Test program and Execution Procedure .................................................... 29 ~ 30

9. DISASSEMBLY AND REASSEMBLY HINTS .......................................................... 31 ~ 33

10. CONTINUOUS DRAINAGE ........................................................................................... 33

PARTS CATALOG .......................................................................................................... 34 ~ 41

11. TROUBLESHOOTING ............................................................................................... 42 ~ 43

PRECAUTIONS ............................................................................................................... 44 ~ 46

1. Product Specifications

Auto-

dehumidification

* The brackets [ ] enclose values measured at a room

temperature of about 15°C or lower.

26.0

Single phase, 230-240V, 50Hz

415

1.9

8.5

White (W)

594 × 372 × 281

15.5

HFC - 134a, 275g

Slit fin

Thermal overcurrent relay

YB691 VTE (rotary)

240

Primary: 16.9 , subsidiary: 30

With temperature fuse

Sirocco fan

1 ~ 35 (°C)

Hot gas type

Built-in humidity sensor

Reed switch (automatic)

Auto-stopper tripped with about 5.0 liters of water

Commercial hose (inside diameter 15 mm)

AUTO, EASY DEHUMIDIFYING, LAUNDRY, MILDEW GUARD, HIGH, LOW, LOW TEMP,

AIR PURIFIER, MILDEW GUARD ELITE

MJ-E26VX-A1

50 Hz

Item

Power supply (phases,V,Hz)

Power consumption (W)

Operating current (A)

Starting current (A)

Color tone

Dimensions (H × W × D mm)

Weight (kg)

Coolant quantity (g)

Evaporator

Condenser

Model

(27°C room temperature,60% relative humidity) (liters/day)

Low temp, laundry

Auto-dehumidification, low

Performance

Product performance

CompressorBlower

Electrical

characteristics

Operating noise

levels(dB)

Compressor protection

Model

Output (W)

Winding resistance (Ω)

Blower protection

Type

Output (W)

Flow rate selection

Speed (rpm)

Flow rate (m3/min)

Operating room temperature

(reference)

(°C)

Low

Low temp

Mildew guard

The operating noise levels indicated are typical values measured in our anechoic room.

603 863

603 or 733

3.3 or

2.6

863

[882]

4.0

[4.1]

2.6 4.0

Laundry

863

[882]

4.0

[4.1]

Dehumidifying capacity

On/Off timer (1-9h)

Ye s

7.5A

Defrosting method

Humidity control

Tank full protection

Tank capacity (liters)

Continuous drainage

Operation modes

Timer

Air cleaning performance

Plug socket rating

High

863

4.0

2. Outer Dimensions

3. Tips on Dehumidifying

Drain the water tank before use

Refrain from opening doors/windows during operation

Drying laundry indoors

Use the dehumidifier in

a small, enclosed room.

Maintain room temperature above 16°C with a heater

Installing your dehumidifier

Make sure to leave some space around the unit.

Operating noise

Place the unit on top of a mat. This reduces vibration and noise. It also prevents leaving depressions on carpets.

At least 50 cm

At least 2 cm

At least 20 cm

At least

20 cm

¡Thoroughly spin-dry the laundry

and hang so there are no wrinkles.

¡Direct the louvres at the laundry. ¡Space laundry to improve airflow.

¡ Drying times will vary depending on the nature of the

laundry and the room temperature.

¡ The airflow is strongest to the top right of the unit.

The water tank may contain water residue at time of purchase. This is from final product testing at the factory and is not due to a defect.

4. External View, Parts and Display Section

What is a washable photocatalytic filter?

The washable photocatalytic filter has a two-layer construction consisting of a white particle filter and a blue air-freshener filter. <Particle filter>

The fine particle filter removes pollen* and dust particles.

<Air-freshener Filter>

The special air-freshening agent contained in the fibres of the air-freshener filter absorbs dorants such as ammonia. The odor is broken down by

photocatalysis renewing the airfreshening properties. As the filter's particle and air-freshening properties are renewed by simply soaking and leaving it to dry in the sun, the air purifier can be used continuously over a long time. Cigarette smoke and toxins found in smoke, such as carbon monoxide, cannot be removed with this filter.

* Diameter of pollen: approx. 10-100µm

Louvre

Main Air Outlet

Control panel

Downward louvre

Tank lid

Tank Guard

Water tank

Float

Level window

Sensor

Do not cover

Back

Washable photocatalytic filter

(hereafter: photocatalytic filter) Supplied with unit. Set before use.

Pre-filter

The pre-filter is made from two layers: a blue air filter and a white particle filter. These layers cannot be separated. Air filter performance testing facility Japan Spinners Inspecting Foundation (tested under JIS L 1902 standards)

Handle

Raise handle to transport

Rear Air Intake

Storage Hook

Cord Tie

Remove during operation

Power plug

Wheel (4)Continuous

drainage outlet

Control Panel

¡Lamps

Current mode lights

¡Selection button

Switches modes

¡Mode button

For switching from one perating mode to another

Humidity Selection

This is used to set the target humidity.

¡Swing louvre

button

Sets swing louvre direction or locks it into position

¡Timer ON/OFF

Sets timer

¡Power lamp

Lights when unit is ON.

¡Power button

Use this to switch the unit ON and OFF.

¡Tank full light

This lights up to warn that the water tank is full.

¡Mildew guard elite lamp

Flashes during internal drying operation.

¡Mildew guard elite button

Activate/deactivates internal drying.

¡Air purifier lamp

Lights during air purifier only operation

¡Air purifier button

Switches to air purifier only operation

¡ EASY DEHUMIDIFYING ¡ LAUNDRY ¡ HIGH ¡ LOW ¡ MILDEW GUARD ¡ LOW TEMP ¡ AUTO ¡ AIR PURIFIER

All modes include dehumidifier and air purifier functions.

Air purifier only operation. The dehumidifier function is disabled.

¡Information display

Indicates room and unit condition

The indicator comes on if the room temperature drops below 15°C. Activating Low Temp mode is recommended.

Low Temperature Indicator

DEFROST Indicator

High humidity warning

The indicator flashes when the humidity in the room exceeds 75%. Activating the dehumidifier is recommended when the indicator is

flashing. If the High humidity warning is not used, remove the power plug from

the power socket.

Airflow (dehumidifying) will stop and the frost that has accumulated inside will be melted and dropped into the tank when the indicator is on. Please wait a moment as operation will resume in around 5 minutes.

While in DEFROST mode, airflow (dehumidifying) and the louvre will stop. The sounds coming from the unit will also change.

DEFROST will start automatically when room temperature drops below 15°C (This may be as often as once every 40 minutes).

¡Mode Indicator

Indicates the current operating mode.

¡Swing monitor

Indicates the direction of the swing louvre.

¡Timer display

Displays the time set for the ON/OFF timer.

You can select from 8

operating modes

¡Humidity Indicator

This indicates the

approximate humidity

indicates the

current humidity indicates the humidity setting in

AUTO mode The current humidity is displayed in a range from 30 to 80%.

LCD Panel

Front

¡Child lock

To set the child lock, press the mode button for three seconds.

All indicators on the LCD panel shown below.

¡ LOW TEMP The unit operates continuously and automatically by controlling airflow according to

room temperature. The air flow is strongest below 15°C. The use of LOW TEMP mode is recommended when the Low temperature indicator is lit.

When the temperature is low, condensation may still form on windows exposed to the outside

air even when LOW TEMP mode is operating

MILDEW GUARD

The unit lowers humidity levels automatically once a day, suppressing mildew growth.

¡ The unit operates intermittently for 2-4 hours a day

(24 hours).

¡ The operating time varies depending on the humidity.

The unit continues to operate when the humidity does not decrease.

• Humidity 40%→Approx. 2 hours

• Humidity 50%→Approx. 4 hours

∞ Refrain from turning on ventilation fans or opening windows or doors as this lowers performance. ∞ Mildew growth may still occur due to the fungus type and conditions of the room.

• E.g. Rooms that contain excessive condensation, bathrooms, and places with bad airflow (insides of closets and behind furniture).

∞ This mode does not remove existing mildew. ∞Do not use in conjunction with OFF Timer mode. Effects may not be achieved.

Information

¡HIGH The dehumidifier operates regardless

of the humidity level. Airflow is strong.

24 hours

Dehumidifies

Standby

24 hours

Standby

How is mildew Mildew is unable to produce new spores (similar to plant seeds) if dried as

mycelia. The Mildew Guard feature applies this principle (However, the

growth suppressed?

spores themselves are resilient to dry conditions.).

“Identification of Aspergillus and Penicillium”

Repeat

¡ EASY DEHUMIDIFYING

The unit operates intermittently controlling the airflow to remove the damp feeling in the air. (There is no need to set the humidity level) When the room temperature is high, the blower operates to decrease the damp feeling.

The airflow or louvre operation may stop according to the humidity level.

¡ LAUNDRY

The unit operates for 12 hours and automatically switches off.

∞ Drain the tank before use.

The unit may stop before the washing dries because of a full tank.

∞ Do not use in conjunction with the OFF

timer.

The timer may turn the unit off before the washing dries.

∞ The following conditions prevent clothes

from drying well:

Room temperature below 15°C, large volume of laundry; laundry not spaced well; clothes of thick fabric and spacious room.

Humidity

level (%)

Room

temperature

(°C)

60 50

20 27 30

Room temperature is below 27°C - the unit automatically sets the humidity level according to the temperature.

Room temperature is above 27°C - the unit lowers the humidity level to 50%, then activates the blower. The dehumidifier is reactivated when humidity rises to 60%.

Modes

Information

¡LOW The dehumidifier operates regardless

of the humidity level. Airflow is weak.

¡ AUTO

The unit maintains the humidity level by automatically controlling airflow and operating intermittently as necessary. All you have to do is set the humidity level.

¡ The unit turns off when current humidity drops

blow the set humidity level (airflow and louvre stop). The unit restarts when humidity rises above the set level.

¡ The unit operates for 6 minutes continuously

regardless of the humidity level immediately after turning the power on.

Frequent use of exits and room size/conditions may cause the humidity to not reach the set level.

To view set humidity level/ To set humidity level

Pressing the button once displays the set humidify level with the

indicator. After 3

seconds, the display returns to the current humidity display.

Pressing HUMIDITY SELECTION while is displayed sets the humidity level. Each time the button is pressed, the humidity setting changes.

¡ AIR PURIFIER

The unit cleans the air by passing it through the pre-filter and photocatalytic filter. The dehumidifying function is disabled.

∞ The air passes through the pre-filter and photocatalytic filter in all modes, cleaning the air even if the

air purifier lamp is not lit.

∞ Cigarette smoke and toxins found in smoke, such as carbon monoxide, cannot be removed with these filters.

Information

Press

Press again

6570 505560

¡ Swing louvre function (how to read the swing monitor)

The louvre can be made to swing. Select from the 5 possible settings to suit the purpose.

Press

¡ Starts swing operation. ¡ The swing monitor is

displayed.

This indicates the range of louvre swing. (The louvre and monitor do not move in synchronization.)

∞ The level of noise emitted from the unit varies according to the angle of the air-flow.

∞

The louvre may stop up to a maximum of 8 seconds to correct its position, after which it will start moving again.

∞ If the louvre is knocked out of the desired angle, readjust by following the above steps.

The swing operation stops when the power cord is unplugged.

30°

Objective Recommended swing setting Explanations of the swing modes

Convenient for drying carpets or beds.

To stop the louvre at the desired angle

To cover the entire room

For drying clothes, etc.

For directing air into a closet

¡Stop swing operation

¡WIDE

¡UPWARD

¡LOW AIR OUTLET

¡REAR

Swing speed is automatically controlled to send air at washing from the all angles.

The louvre swings from the UPWARD position through to the REAR position in order to send air to all corners of the room.

The louvre stops in a vertical position. The swing monitor turns off.

To change the louvre to a desired angle, wait until the louvre stops, then adjust by hand.

The louvre moves slowly through the last 30° of the swing, as the time taken to traverse the rear arc is shorter than that for the upward arc when moving at a constant speed.

The swing function is not available. Adjust the angle manually (from three possible positions).

When using the low air outlet, do not close the louvre, as it needs to open slightly to make directional adjustments.

Move the louvre from the sides.

Depending on the angle of the louvre, some air may blow out of the low air outlet.

Information

¡ To dry the inside

The inside of the unit can be dried to suppress mildew growth on the cooler. On days the dehumidifier is used, internal drying (drying the inside) is recommended.

<Internal drying operation> This operation takes approximately one hour. However, when the

room temperature is below 1°C, drying time is shortened to protect the compressor.

OFF

Regular operation

Dehumidifier Air purifier

Internal drying operation (approx. one hour.)

Airflow

Approx. 30min.

Airflow stops; compressor activates (operating sound)

Compressor operates according to room temperature

Approx. 20min.

Compressor stops

Airflow

Approx. 10min.

Unit stops automatically

Operating

sounds

To abort internal drying

Press the mildew guard elite button while the unit is performing internal drying (the mildew guard elite lamp turns off)

Press the power button to abort internal drying, and resume normal operation.

∞ Turning off at the wall deactivates automatic operation. ∞ This function does not remove existing mildew. Also, aborting internal drying may cause the benefits

to diminish.

∞ Do not close the louvres while internal drying as this causes noise. ∞ The moisture expelled from inside the unit may cause the humidity level of the room to rise. ∞ The air leaving the unit may appear white depending on the humidity or temperature of the room. ∞ The moisture expelled from inside the unit may smell due to odorants* that were not caught by the

filter dissolving in the water. * The photocatalytic filter is mainly for absorbing ammonia.

∞ The OFF timer cannot be set during internal drying.

Information

Press while the unit is off

Press while the unit is on

Manual operation

To activate internal drying by pressing a button.

¡Internal drying starts

The mildew guard elite lamp flashes, the humidity indicator turns off, and the louvre stops in the vertical position.

Internal drying mode

¡Internal drying ends

Mildew guard elite lamp turns off and the louvres shut.

Automatic operation

To activate internal drying after every use.

¡Internal drying standby

(Mildew guard elite lamp lit)

Internal drying starts when operation ends

When the unit is turned off, LAUNDRY mode ends, or the OFF timer ends.

¡Internal drying starts

The mildew guard elite lamp flashes, the humidity indicator turns off, and the louvre stops in the vertical position.

Internal drying mode

¡Internal drying ends

The mildew guard elite lamp turns off and the louvres shut.

Press the MILDEW GUARD ELITE button while the unit is on (the mildew guard elite lamp turns off)

To cancel the OFF timer

Press the POWER button. (Power off)

¡ The OFF Timer is cancelled.

Keep pressed until the remaining time display disappears to return to continuous operation.

¡ The OFF Timer is cancelled.

To cancel the ON timer

Press the Power button. (Power off)

¡ The ON timer is cancelled.

Press

The following is an example of a display indicating AUTO dehumidifying (set to 60%), swing set to WIDE and the ON timer set for 5 hours.

¡ The time remaining until the unit switches itself on

is indicated in increments of one hour.

¡ When the set time is reached, the unit switches

itself on.

To set

1 Switch the power off. 2 Set the time you wish the unit to turn on.

Press once. The Power lamp, Mode indicator, and a [ ] on the digital display flash. The [ON] indicator lights.

¡ Each subsequent press changes the display in

order from 1 to 9 hours. (Hold the button to run automatically through the numbers.)

3 Select operating mode.

Select desired operating mode. Set internal drying (auto) as desired.

4 Change the louvre swing direction.

Select the desired setting.

Confirm the operating start time.

¡ Power lamp and Time display light.

➝ The ON timer is set.

The unit informs you if you forget to press the Power button by making the Time display and Mode indicator blink and sounding an alarm for 1 minute.

[

Timer Operation

]

OFF timer operation

The OFF timer can be set for 1 to 9 hours. Set the timer when the power is switched on.

ON timer operation

The ON timer can be set for 1 to 9 hours. Set the timer when the power is switched off.

To set

1 Switch the power on. 2

Select operating mode.

Select desired operating mode.

3 Change the louvre swing direction.

Select the desired setting.

4 Set the operating time.

When pressed once the figure [ ] and [OFF] appear.

Each subsequent press changes the display in order from 1 to 9 hours. (Hold the button to run automatically through the numbers.)

➝ The OFF timer is set.

The following is an example of a display indicating AUTO dehumidifying (set to 60%), swing set to WIDE and the OFF timer set for 2 hours.

The time remaining until the unit switches itself off is indicated in increments of one hour with a flashing numeral.

¡ When the set time is reached, the unit switches

itself off and the louvre closes automatically.

Internal drying will commence if it has been activated.

No Display

(LOW mode)

Press

No Display

(operation

is off)

∞ Empty the water tank before operating. The unit

stops and the Tank full lamp lights if the tank becomes full during operation.

∞ The OFF timer and ON timer cannot be set at the

same time.

∞ Do not use timer OFF mode in conjunction with

LAUNDRY or MIDEW GUARD.

∞ The OFF timer cannot be set during internal drying.

∞ Internal drying is deactivated when the ON timer is

set during internal drying operations.

∞ The ON timer function is not operable using a

commercially-available timer plug outlet.

Information

43221

341・523

5. Technical points

5.1 The technical points of the new products

1) Internal drying

During dehumidification, moisture accumulates on the heat exchanger. If left, this can lead to mildew growth, which is circulated around the room with the air discharge. Internal drying starts automatically after operation, and dries any moisture inside the unit.

2) Powerful 26-litre/day dehumidifying

The uncomfortable damp feeling caused by humidity is something that needs to be removed quickly. Mildew can grow and damage the home or clothing when closets, dressing rooms, shoe cabinets, and other spaces where humidity is prone to collect are not dehumidified. A single high-capacity unit is effective in dehumidifying and drying various locations throughout the home, quickly moving from one point to the next.

3) Room humidity and sensible temperature comfortably controlled

The EASY DEHUMIDIFYING mode controls humidity according to room temperature. If the room temperature rises during dehumidification, use CIRCULATION mode (*1) to lower the sensible temperature. *1The automatic dehumidification and blower modes operate alternately controlling the sensible

temperature and humidity to a comfortable level (50%–60%).

4) Washable photocatalytic filter

The photocatalytic deodoring filter and particle filter are integrated. This filter collects ammonia, the base for household smells, as well as dust, fungus spores, and pollen. It is easy to clean, meaning longer lasting performance.

The dehumidifier does not have a cooler function. Due to heat produced during operation, the room temperature may rise 2-4°C As a result, the unit may blow warm air, but this is not due to a malfunction. During winter, the air may not feel warm as the temperature is below body temperature.

The dehumidifier will not operate for 3 minutes when the unit is turned on immediately after being turned off or plugged in. (In order to protect the compressor.) When dehumidifying begins, the operational noise increases. This is not a malfunction.

Working temperature

Wait for 3 minutes before dehumidifying

Defrosting

Room temperature may rise 2-4°C during operation

5.2 Operation and Performance

Dehumidification is possible with a room temperature of 1 – 35°C. If the room temperature exceeds 35°C, however, the temperature inside the unit will increase; therefore, the protective device may activate and halt operation in some cases. For this reason, the louvres should be aimed upward.

• If the room temperature is lower than 1˚C, there is danger of the removed water freezing, making dehumidification impossible, so the fan will start operating.

The unit may display during operation and stop air flow, followed by a change in the operating noise. The unit has stopped the airflow, and is melting internal frost into the water tank. The unit will resume automatically when the defrost operation completes.

This operation will be performed automatically when the room temperature is approximately 15°C or lower. (When humidity is high, this will occur approximately once every 40 minutes for 5 – 10 minutes.)

How does the dehumidifier work?

If you pour cold water into a cup, the air around it becomes cold, causing water droplets to form on the surface of the cup. The dehumidifier takes advantage of this phenomenon to remove moisture from the air.

1 The unit draws air from the room, cools it with

its cooling coil, causing the moisture to transform into water droplets.

2 The water droplets fall into the water tank.

3 The dehumidified air is reheated by the

heating coil, and then discharged.

The humidity of the room is thus reduced by repeating steps 1, 2, and 3.

The humidity reading on the unit may differ from a hygrometer in the same room

Even in the same room, temperature and humidity levels may differ from place to place. If the hygrometer and the unit are in different parts of the room, the humidity levels are prone to differ. Moreover, humidity levels differ between places that have good and no airflow.

Use the reading on the unit as an estimate.

<Cause>

● Inconsistencies in temperature and humidity

● Difference in location

● Difference in hygrometer precision

Re-heating coil

Cooling coil

Moist air

Compressor

Dried (warm) air

Water tank

5.3 Coolant Circuit

Dehumidifying

Defrosting

Coolant flow

Blow

Fan

Heat exchanger

(heat radiation)

6.35

φ7.00

Compressor

Heat exchanger

(cooling)

Intake

9.52

Tube temperature sensing thermistor

6.35

Capillary tube

2.0

× φ

0.85 × 200

5.0

× φ

4.0

6.35

Humidity sensor

Room temperature sensing thermistor

Solenoid valve

(closed when dehumidifying and open when defrosting)

5.4 Performance curve When the temperature and humidity are low, the amount of water collected is

decreased.

In winter, because the temperature is lower than in summer, the effect of the dehumidifier is greatly reduced as shown in the graph below. Although less water collects in the tank, this is not a malfunction.

Summer (humidity)

Winter (dampness)

* If the temperature is low, but the humidity is high due to snow or rain, operating the unit in LOW TEMP

mode will yield better results than in HIGH mode.

¡ The values shown on the graph were measured at

constant temperature and humidity and do not reflect values obtained in actual usage conditions.

510152025 30

Room temperature

Dehumidification capacity (L/day)

Temp. Temp.

6. Maintenance

Dry well in the sun (The performance of the filter renews with soaking, and the photocatalytic effect of the sunlight removes remaining odorants)

Hose with lukewarm water when excessively soiled. Dry well.

Remove grit with vacuum cleaner

Remove the pre-filter.

Remove the photocatalytic filter.

Clean the pre-filter.

Floating element

Do not remove or dismantle.

Fit the photocatalytic filter.

Attach the pre-filter.

Remove the pre-filter.

Remove the photocatalytic filter.

Soak the photocatalytic filter in water.

Dry the photocatalytic filter.

Fit the photocatalytic filter.

Attach the pre-filter.

Water tank · Main unit

Wipe with a soft cloth.

Cleaning

Once every three months

Pre-filter

Debris clogging the pre-filter reduces the effectiveness of the dehumidifier. Clean once every 2 weeks.

Once every two weeks

Do not use detergents, cleaning agents for heat exchange equipment, abrasive powders, chemically treated dusters, gasoline, benzene, thinners or other solvents, as they can damage the unit or the water tank, which may result in leakage.

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.

Do not use detergent or hot water. Also, do not brush or rub while soaking as this may damage the filter.

Do not hang with pegs as this may damage the filter. Do not use the filter while wet.

Maintenance

Photocatalytic filter

Soaking the filter in water, and leaving it to dry in the sun renews the performance and prolongs service life. Perform this every three months.

Soak in cool to lukewarm water for 30 minutes.

¡The unit draws in dust present in the air, and

this may cause the tank to gradually become dirty. If the dirt does not come off easily, wash with cold or warm water, then wipe with a soft, dry cloth.

¡Mildew may form in the tank unless kept

clean.

3 Reattach the tank lid and replace

the water tank.

Check the lid and guard are secure. Slide the tank in with both hands (you should hear a beep.)

¡ Secure the lid and guard properly or else the

tank may become stuck.

¡ If the tank is not installed correctly, the tank full

light will come on, and the unit will not operate.

Pour the water out as shown.

Removing Water from the Tank

1 Remove the water tank.

Floating element

Do not remove or dismantle the float.

Note

Hold the tank this way

Grasp handle and slide out.

Do not remove or dismantle the floating element in the tank. If it is removed, the unit cannot detect when the tank is full, and this could result in leakage.

Tank lid

The unit automatically shuts down and lights the Tank full lamp when the tank (approximately 5L) is full. Empty the tank.

Tank guard

2 Remove the tank lid, and empty.

After switching the unit off, leave for one day until any water inside has had time to run off, then carry out the following steps.

1 Perform drying inside

Performing internal drying to prevent mildew growth is recommended.

2 Bundle

power cord.

3 Remove the

drainage water.

Empty the water tank and wipe away any remaining drops of water.

Clean the pre-filter.

Remove grit with vacuum cleaner

5 Store the unit.

•When you are sure that all parts of the unit are dry, cover it with a cloth to keep it from dust.

• Store the unit in an upright position in a place not exposed to direct sunlight.

Replacement Parts

The photocatalytic filter becomes depleted over time.

Replace them when necessary.

Storage

When disposing the unit

Dispose according to the garbage regulations in your district.

¡ Photocatalytic filter

Material: PET and PS

¡ Unit

Do not disassemble. Dispose according to the garbage regulations in your district.

Remove the pre-filter and replace the photocatalytic filter.

Photocatalytic filter for replacement

∞ Type: MJPR-18TXFT ∞ Type code: 5C5 816

For these items contact your nearest Mitsubishi Electric dealer.

Parts sold separately

Replacing the photocatalytic filter

Although the photocatalytic filter lasts roughly 2 years, replace it when:

¡ You have soaked the filter 8 times. ¡ The photocatalytic filter has turned brown due

to cigarette smoke or black with dust.

Filter life differs on usage and environmental conditions.

7. Wiring Diagram and Block Diagram

7.1 Wiring Diagram

(1) Current fuse ....................Overcurrent flow caused by degraded electrical parts turns off the power.

Current setting: 2A

(2) Motor protector................Room temperatures exceeding about 40°C shut down the compressor.

(Overload relay) The compressor also shuts down when it is locked or otherwise malfunctions,

with current flow exceeding 2.5A.

(3) Control circuitry ...............The room temperature thermistor, on sensing a room temperature below about

0°C, shuts down the compressor.

(4) Thermal fuse ...................The blower shuts down when it is locked or otherwise malfunctions, with its

temperature exceeding 134°C.

Safety Devices

P11

P10

P100

P2 P3P5

P20

P13

101

Blue

Black

Gray

White

Red

Yellow

Overload relay

Compressor

Solenoid valve

Fan motor

P200

P201

Sensors

(Humidity and room

temperature sensing)

Control board

White White

Brown Brown

Tank full switch

Stepping motor

Gray

Power supply board

Gray

Run capacitor

Blue

Brown

Power plug

Thermistor (Tube temperature sensing)

1 C (defrost)/12 C (end)

7.2 Function List

Compressor

Blower

Solenoid valve

Swing louvre

Power

Lamps

Air Purifier

Tank full

Mildew guard elite

Humidity (set/current)

Operation mode

Swing area

Swing monitor

On/off timer

Mildew guard

Defrost

Low temp

Child lock

Power

Selection

Mode

Humidity Selection

Air purfier

Swing louvre

On/off timer

Mildew guard elite

Child lock

LCD indicator

LED indicator

Button

Child lock

Mildew guard

Low Temp

Laundry

Easy

dehumidifying

Tank full

Air purifier

Mildew guard elite

Defrost

Off timer on

On timer

being set

On timer

counting

Low

Operation mode

Dehumidifying operation

Operation off

Auto

Note

: Display lamp/Operable : Timer – flashes when on : Off/stopped/inoperable : Operable only when swing on/lit : Operable only when swing on and blower fan rotates

: LCD lights at each operation mode : LCD flashes at each operation mode : Lights at room temperatures of 14°C or under

: Varies by conditions. : ON LED lit or flashing : OFF LED lit

OFF

High

HIGH

1 Specifications shared at all operation modes

The compressor and blower fan will operate for about 6 minutes after turning on the operation switch or activating the compressor, regardless of humidity or temperature levels.

2 Humidity set operation

Compressor and blower fan operation will switch by current humidity and set temperature.

3 High, Low, Low Temp, Mildew Guard, Air Purifier

Compressor

Rank 3

Rank 1

Rank 2

Rank 3

Rank 5

Rank 0

27°C

29°C

OFF

Current humidity – Set humidity

Decline in

current

humidity

+3%

–1%

34°C

36°C

+5%

+1%

Rise in current

humidity

Fan temperature table

Compressor

Mildew Guard

Low Temp

Rank 4

Rank 6

Rank 4

Rank 5

Rank 4

Air Purifier

OFF

Rank 1 Rank 1

Rank 1

Low

Rank 1

Rank 2

Rank 5

Rank 1

High

Rank 4

Rank 5

Rank 4

Fan temperature table

27°C

29°C

34°C14°C

16°C 36°C

4 Mildew Guard mode

Outline of Control (a) Lowering the temperature once a day ‘suppresses’ mildew growth. (b)

The dehumidification time changes depending on how much the temperature was lowered (40%: 2 hours, 50%: 4 hours).

2. Under the following conditions, mildew guard will clear the time count and restart with initial settings. Mildew guard starts with dehumidifier operations by turning ON the compressor and fan regardless of the present humidity or time. (a)

The power is turned ON when mildew guard is selected (i.e.: power button is turned ON or ON timer time is reached). (b) Mildew guard is selected with the MODE button. (c) Mildew guard is reactivated by operating the air purifier button (Air purifier ON → OFF). (d) Mildew guard is run for 24 hours.

3. While mildew guard is operating, the dehumidifier is deactivated under the following conditions. (a) Current humidity below 35% detected followed by 2 hours of below 40%.

However, the accumulated time is cleared if the current humidity breaches 41% for 3 consecutive minutes during the count.

(b) Current humidity below 45% detected followed by 4 hours of below 50%.

However, the accumulated time is cleared if the current humidity breaches 51% for 3 consecutive minutes during the count.

4. After being deactivated in step 3, if the humidity level reaches 71%, the dehumidifier is automatically activated and runs until the level drops below 65%. Below 65%, the dehumidifier remains deactivated until the humidity level again reaches 71% (limiter dehumidifier operation).

5. Mildew guard mode is disabled in the following cases. (a) The mode button is used to activate Low Temp mode. (b) The selection button is used to activate the previously set mode (EASY DEHUMIDIFYING/LAUNDRY). (c) The air purifier button is used to activate AIR PURIFIER mode

2HR 2HR

4HR4HR

45%

Elapsed time

35%

Elapsed time

Humidity level

Compressor Blower

Mildew

Guard

Below 45%

time count

start

Below 35% time count

start

Below 35%

time count

stop

Dehumidifier

activated

Below 35%

time count

start

Dehumidifier

deactivated

Dehumidifier

deactivated

Dehumidifier

deactivated

Accumulated

time counts

reset

65%

45%

40%

35%

24HR

75%

OFF

Below

45%

Below

35%

3 minutes above 41% elapse

Limit 71%

Limit

recovered 65%

Target part Compressor Airflow fan

Solenoid valve

Louvre

Operation ON/OFF Rank control OFF ON/OFF

5 Easy Dehumidifier

1. Controls (a) Adjusts humidity according to room temperature for increased comfort. (b) CIRCULATION mode is activated when the temperature is high and the humidity is low. This mode keeps the

compressor off.

(c) Switches temperature table every 60 seconds to prevent the blower from turning on and off at the 3-minute restart for

the coloured section in the chart above. (51% – 59%)

(d) When the room temperature is above 29°C (temperature rising) or 27 °C (temperature decreasing), CIRCULATE

mode operates with the humidity below 50%.

(e) The unit activates the dehumidifier when the humidity rises above 60%, and returns to CIRCULATE mode when the

humidity drops below 50%.

60%

OFF OFF OFF OFF

60% 60%50% 50%

50%

12 3

Current humidity – Set humidity

20°C 27°C 34°C

+3%

–1%

+5%

+1%

Temperature

Temperature table

Set humidity

Dehumidification

Fan rank

Compressor

Fan rank

Compressor

Fan rank

Compressor

22°C 29°C 36°C

Rank 3

Rank 1

Rank 3

Rank 1

Rank 3

Rank 2

Circulate

Dehumidifier

mode

Dehumidifier

mode

Rank 3Rank 0Rank 0 Rank 5

Circulate

mode

Rank 5

Circulate

mode

Dehumidifier mode

Circulate

Dehumidifier modeDehumidifier modeDehumidifier mode

Circulate

set humidity 60%

Dehumidifier mode

set humidity 50%

Circulate

set humidity 60%

Set humidity 60% Set humidity 50%

ON OFF ON

OFF

50%

60%

Humidity

Compressor

Blower

~20°C~ ~27°C~Temperature

Target part Compressor Airflow fan

Solenoid valve

Louvre

Operation ON/OFF Rank control OFF ON/OFF

2. Easy DEHUMIDIFYING mode is disabled in the following cases. (a) The MODE button is used to activate the previously set mode (HIGH, LOW, AUTO, MILDEW GUARD, LOW TEMP). (b) The selection button is used to activate LAUNDRY mode. (c) The air purifier button is used to activate AIR PURIFIER mode.

Room temperature

Humidity

Set humidity

60%

Set humidity

50%

When 60% exceeded, lowers to below 50%

Compressor

OFF

Fan rank 0

Compressor

OFF

Fan rank 0

CIRCULATE mode

60%

50%

20°C 27°C

6 Internal drying

1. Controls (a) Prevents the growth of mildew by drying the moisture accumulated on the heat exchanger when the dehumidifier is

OFF. (b) Internal drying operation does not depend on having a full water level. (c) The following operations are performed during internal drying operation.

2. Start conditions for internal drying operations (a) Automatic internal drying mode - This mode starts when the Mildew guard elite button is set to ON, and any of the

following conditions are met.

• The Power button is turned OFF.

• The OFF timer time is reached.

• The LAUNDRY mode completes operations.

(b) Manual internal drying mode - This mode starts when the Mildew guard elite button is operated while the following

condition is met.

• The Power button is turned OFF.

3. Operating details (a) The following indications are displayed during Internal drying operation

• LED indicator: Only mildew guard elite lamp flashes, others off

• LCD panel: All off

(b)Internal drying operates according to the following steps

• Step 1: Moisture is allowed to drip from the heat exchanger. The louvre is positioned upwards at 90˚.

• Step 2: Moisture on the heat exchanger is dried with air.

• Step 3: Moisture on the heat exchanger is dried with heat.

• Step 4: The heat exchanger is cooled if the temperature rises too high.

• Step 5: Internal humidity is discharged in Step 4, and the louvre moves to the closed position.

and jumps directly to Step 5.

(d) Mechanisms operated in the above steps (* are deemed EEPROM data.)

(e) Internal drying operation does not stop even if tank full is detected.

4. Conditions for internal drying operation to end (a) Upon completion of step 5 above. (b) The following buttons terminate internal drying operation (during steps 1 to 5 above) when pressed.

• Power button

• Mildew guard elite button

• ON timer button

5. Internal drying operation is not performed under the following conditions. (a) The power is ON. (b) The ON timer is operating. (c) An error is detected during self-diagnosis.

Target part Compressor Airflow fan

Solenoid valve

Louvre

Operation ON/OFF Rank control OFF Stops at 90°

Step

Fan

Compressor

Solenoid valve

Conditions for moving to next step

Step 1

Step 2

Step 3

Step 4

Step 5

Rank 1

Rank 3

Rank 0

Rank 1

OFF

Operates for 5 min.

Operates for *25 min.

Moves to Step 5 when tube temperature is above 45˚C * or unit operates for MAX 20 min.

Operates for 20 min including time for Step 3. *

Internal drying stops after operating for 10 min.

Target part Compressor Airflow fan

Solenoid valve

Louvre

Operation OFF Rank 0 OFF Closed

7.3. Timing Charts

Power button

Mode indicator

Compressor

Fan

Solenoid valve

Float switch

Tank full indicator

Humidity

Tube temperature

High humidity warning

Low temp indicator

Louvre

Swing

OFF

Swing

Louvre indicator

(For swing ON only)

Buzzer

Mildew guard

elite lamp

Operation start/Mode button/Operation stop

Lights when room temperature is below 14˚C

Power

Mode

button

Mode

button

Mode

button

Humidity

set

Low (Continuous)

Max 3 min

Mildew guard

Low temp

Auto

Humidity setting 60%

Dehumidification

stops

OFF

OFFONOFFONOFF

OFF

60%

59%

61%

OFF

OFFONOFF

0°C

12°C

OFFONOFF

OFF

Stops at 90˚

Humidity

set

Dehumidification

restarts

Easy

modes

Easy

modes

Power

OFF

3 sec standby

Min 3 min

Humidity setting 55%

Easy dehumidifying

Laundry

Power button

Mode indicator

Compressor

Fan

Solenoid valve

Float switch

Tank full indicator

Humidity

Tube temperature

High humidity warning

Low temp indicator

Louvre

Swing

OFF

Swing

Louvre indicator

Buzzer

Mildew guard

elite lamp

OFF

OFFONOFFONOFF

OFF

75%

OFF

OFFONOFF

0°C

12°C

OFFONOFF

OFF

Defrosting / Tank full detection / High humidity warning

Defrost

count start

Defrosting

start

Defrosting

stop

Tank full

detected

Tank empty

detected

Swing louvre

button

Power

OFF

Humidity

increase

Humidity

decrease

Flashes

3 sec

standby

40 min elapsed

Low priority

buzzer

Lights when room temperature is below 14˚C

Swing mode changes

Swing mode indicator changes

Dehumidification

mode

Power button

Mode indicator

Compressor

Fan

Solenoid valve

Float switch

Tank full indicator

Humidity

Tube temperature

High humidity warning

Low temp indicator

Louvre

Swing

OFF

Swing

Louvre indicator

Buzzer

Mildew guard

elite lamp

OFF

OFFONOFFONOFF

OFF

OFFONOFF

75%

OFF

OFFONOFF

0°C

12°C

OFFONOFF

OFF

ON/OFF timer operation

ON timer

Power ON

(set to 2 hours)

1 hour

2 hours

1 hour

2 hours

OFF timer

Lights when room temperature is below 14˚C

Stops at 90˚

Indicates swing area only

Indicates swing mode

Power button

Mode indicator

Compressor

Fan

Solenoid valve

Float switch

Tank full indicator

Humidity

Tube temperature

High humidity warning

Low temp indicator

Louvre

Swing

OFF

Swing

Louvre indicator

Buzzer

Mildew guard

elite lamp

OFF

OFFONOFFONOFF

OFF

OFFONOFF

75%

OFF

OFFONOFF

0°C

45°C

OFFONOFF

OFF

Air purifier operation / Internal drying operation

Air purifier

Air

purifier

Mildew

guard elite

(internal drying)

Power

OFF

Automatic

internal drying

complete

Manual internal

drying start

Manual internal drying

override stop

Stops at 90˚

Dehumidifier mode

30 min

10 min

Dehumidifier

mode

Air purifier

Lights when room temperature is below 14˚C

Indicates swing mode

flashes flashes

Stops at 90˚

MAX 20 min

7.4 General Block Diagram

Restore AC power supply

Replace fuse

Mechanical check

• Correct defects.

• Replace the switch if defective.

Replace control board

Normal

Abnormal

OFF

Not blown

Blown

Uncorrected

The unit does not operate

Start

Check AC power supply

Has the fuse blown out?

Is the float switch turned on?

Control board connector check

With the power plug removed from the receptacle, remove and insert each connector two to three times to improve its contact. Then, insert the power plug into the receptacle to make an operation check. Make sure that the flat cable and the connectors are inserted straight.

Check operation

Step 1

Step 2

Dehumidifier doesn’t operate at all

Does the fan operate?

Set mode to HIGH.

Check connectors

YES

Are the resistor values of the fan motor no good? (See page 28)

Replace board

Replace motor

8. Troubleshooting Procedure

8.1 Troubleshooting flowchart

Step 3

YES

Does the compressor operate?

(NO if stalled)

*The compressor does not operate for

3 minutes after turning the power ON or OFF. (See page 10)

Is there an overcurrent?

(Surface is hot)

Replace compressor

Is the compressor relay

operating properly?

Check board (open/bridge)

Check resistor values for

temperature sensor (See page 28)

Replace sensor or

repair open/bridge

Check connectors

Is the continuity of the motor protector no good? (Normal: CLOSE; Malfunction: OPEN)

*Check when there is no

current and the unit is at room temperature.

Replace motor protector

Are the resistor values of the compressor no good? (See page 28)

Replace compressor

Step 4

Step 5

Step 6

Step 7

YES

Is the heat exchanger (evaporator) cold?

* Check by operating for 30 minutes.

Check the coolant circuit. (Leaks or blockages)

*The part of the cooler near the tube

temperature sensor should be at least 10˚C lower than room temperature when normal.

Are the power consumption

and current normal?

Is the filter blocked?

Is the operating environment low

humidity or low temperature?

Clean filter

Dehumidification may not be possible in low humidity and low temperature environments. (See page 10)

Is dehumidification taking place? (Water drops are being collected)

Recheck Steps 3 to 5

No problem

*If error indicators are lit, see Error Indications

and Corrective Actions on page 29.

Replace board

* If the customer complains that the unit won’t dehumidify, make the following checks before starting to repair the coolant

circuit:

1 Clogged filter, or dust: ➞ Action: Clean. 2 Low-temperature, low-humidity operating environment:

➞ Action: See the explanation of the graph on page 11, or move the unit to a kitchen or bathroom and request

verification of its performance.

3 Request checking whether the unit is in an automatically-stopping operation mode such as “AUTO” or “EASY

DEHUMIDIFYING”, etc.

➞ Action: Verify to dehumidify in “HIGH” operation mode. (See pages 5 – 7.)

8.2 Key Component Check Procedures

Component name

Testing procedure

Tub temperature sensing thermistor

Room temperature and humidity sensor board

Compressor

Fan motor

Solenoid valve coil

Detach the connector and measure the resistance using a multimeter (component temperature: 10°C to 30°C).

With the connector detached, measure the resistance across the terminals using a multimeter (winding temperature: 10°C to 30°C).

Normal

Abnormal

Between P11 pins: 8.0kΩ to 20.8kΩ

Normal: 47 to 51kΩ (between P10 pins 3 and 4) Abnormal: Open or shorted

P11

Open or shorted

Normal

Abnormal

Open or shorted

Measure the resistance between terminals using a multimeter (component temperature: 10°C to 30°C).

Measure the resistance between terminals using a multimeter (winding temperature: 10°C to 30°C).

2.6kΩ ~ 2.9kΩ

Open or shorted

Normal

Abnormal

25.0Ω ~ 27.1Ω

67.9Ω ~ 73.5Ω

C-R side C-S side

Open or shorted

Normal

Abnormal

258Ω ~ 280Ω

379Ω ~ 411Ω

Yellow-Blue

Black-Blue

Stepping motor

Measure the resistance across terminals with a multimeter. (Part temperature: approx 25°C)

Open or shorted

Normal

Abnormal

342Ω ~ 418Ω

Terminals 1-2

Terminals 1-3

Terminals 1-4

Terminals 1-5

Error (failure)

P10 connector out of position Room temperature thermistor blowout

Check the P10 connection. Check the room temperature and humidity sensor board.

Corrective action

Room temperature thermistor short Room temperature and humidity sensor board failure

P11 connector out of position Tube temperature thermistor blowout

Check the P11 connection. Check the tube temperature thermistor.

Tube temperature thermistor short Tube temperature sensor failure

Microprocessor failure RAM error

Replace the main board.

Frequency determination error (When power is on)

Outlet/power check (Replace the main and power supply boards.)

Watchdog timer error Replace the main board.

Compressor

Check blowing performance. Check the tube temperature thermistor. Check the compressor operating noise.

Indication

(Timer display)

Frequency determination error (During operation)

8.3 Error Indications and Corrective Actions

8.4 Self-Test Program and Execution Procedure

(1) Deactivating 3-minute restart prevent lock

●Start: Press the MODE and HUMIDITY SELECTION buttons together 3 times when the power is off. Press the POWER button within 2 seconds.

●Functions:

1 Deactivates 3-minute restart prevention lock (immediate operation) 2 Fan: Fix at rank 6 (max. airflow) 3 Activates compressor 4 Operating mode: Low Temp 5 Low temperature is indicated on LCD. 6When EEPROM error is detected, water full, m

ildew guard elite, air purifying and LED are lit.

●To end: Turn power off. The solenoid valve functions for 3 seconds.

LCD and LED all lit

Current humidity

Room

temperature

indicator

Tube

temperature

indicator

Current fan

rank

Determined

frequency

For current humidity

(all displays in decimal)

Mode displayed

Examples

(2) LED, LCD and fan tests

●Start: Press the MODE and HUMIDITY SELECTION buttons simultameously 4 times when the power is off. Press the POWER button within 2 seconds.

●Mode select: Use the timer switch to change the diagnosis mode (0 - 5).

●Finish: Turn the power OFF. The solenoid valves operate for approximately 3 seconds.

(3) Operation/Error history mode

●Start: Press the MODE and HUMIDITY SELECTION buttons simultameously 5 times when the power is off. Press the POWER button within 2 seconds.

●Mode select: Use the Timer button to select indicator mode (0-F).

●Finish: Turn the power OFF. The solenoid valves operate for approximately 3 seconds.

(4) Demo program

●Start: With the power OFF, hold down the MODE and SELECTION buttons, and press the power button. The demo program starts in 3 seconds.

●Operations (all buttons are disabled):

1 Fan: Fixed at rank 3 2 Compressor/solenoid valve: Stopped 3 LCD/LED: Lights in random sequence 4 Swing louvre: Wide

●End: Remove power plug.

0: Latest error

7: Oldest error

Compressor

malfunction detected

Error history display

Example: Latest error display

Tube temperature

Thermistor short-circuit

detected

Watchdog error

Tube temperature

Thermistor short-circuit

detected

Frequency determination

error at power ON

Room temperature

Thermistor short-circuit

detected

Frequency error

when fan operated

Room temperature

Thermistor short-circuit

detected

Latest error Display mode

A6 error

A2 error

A3 error

P4 error

E8 error

E7 error

E1 error

E0 error

When “display mode” is 8 to F, the number of error generations is displayed in hexadecimal.

1. Remove the filter and the water tank

2. Detach the rear panel

3. Detach the front panel assembly

<<Demounting the control board>>

(See Pictures 1 and 2.)

Picture 2

Picture 6

Rear panel

Filter

Rear panel setscrews (3 on each side)

(See Picture 5.)

Repairable

parts

Board cover setscrews (2)

Picture 1

Water tank

Front panel setscrews (2 on each side of the front)

Picture 4

Detach 2 connectors with leads

Picture 5

Tube temperature sensor

Solenoid valve

Picture 3

Front panel assembly

Thermal relay

Front panel setscrew (one on each side of the rear)

Control board setscrews (2)

(Enlarged view)

Wrap the cushion on the leadwires and insert halfway into the hole.

Step 1) Detach the rear panel as directed in

Procedures 1 and 2 above.

2) Remove the front panel setscrews (2 on each side of the front).

(See Picture 3.)

3) Remove the front panel setscrews (1 each on the left and right) from the rear.

(See Picture 3.)

4) Slide the front panel upward, then forward (straight) to avoid the swing louvre.

5) Pull the front panel forward and remove it by releasing the main board connectors (P100, P101) and leadwire set tape from the power supply board.

Step 1) Remove the rear panel setscrews (6).

(See Picture 2.)

2) Pull out the rear panel. (See Picture 3.)

Control board, power supply board, solenoid valve, tube temperature sensor, room temperature and humidity sensor, stepping motor

Step 1) Remove 2 board cover setscrews.

(See Picture 6.)

2) Remove the panel cover from the front panel.

3) Remove the 2 control board set screws.

4) Life off the control board.

9. Disassembly and Reassembly Hints

9.1 Disassembly procedure

4. Removing the blower fan assembly

Repairable

parts

Float switch, blower motor, and blower fan

Picture 10

Setscrew

Blower fan assembly

Setscrew

Board holder assembly

Setscrew

Connector cover

Picture 7

Float switch

Picture 11

Setscrew

Picture 13

Leadwires

Picture 9

Picture 12

Duct

Hook

Blower fan setscrew

Setscrews

Duct

Be sure to attach the mica sheet when mounting the board to the holder.

<<Demounting the power supply board>> Step 1) Detach the connector cover.

2) Pull out the board connectors.

Pull out the board holder assembly setscrews (2) and remove the holder assembly.

4) Open the cover by unhooking if from the board holder.

(See Picture 7.)

5) Remove the compressor capacitor and the connector (P4), demount the board and remove mica sheet.

(See Picture 8.)

Picture 8

Step 1) Detach the front panel assembly and rear

panel as directed in Procedures 1 to 3 above.

2) Disconnect leadwires from the motor support case.

(See Picture 9.)

3) Remove blower fan assembly setscrews (2).

(See Picture 10.)

4) Lift off the blower fan assembly.

<<Removing the float switch>> Step 1) Remove the float switch.

Note:

Handle the float switch with care when removing and reinstalling it.

(See Picture 11.)

<<Removing the blower motor>> Step 1) Remove setscrews (2) and then release duct

hooks (3).

(See Picture 12.)

2) Remove the blower fan and set nut (1) to release the fan.

(See Picture 12.)

3) Remove the duct, the motor support frame and setscrews (4) to release the support frame.

(See Picture 13.)

Drain pan assembly

Heat exchanger

Compressor

Setscrews (3)

Base

5. Removing the drain pan assembly

Removing the compressor and the heat exchanger unit

Thermal relay

Repairable

parts

Heat exchangers (heat radiation, cooling), dryer, thermal relay

Picture 14

10.

Continuous Drainage

Open the drainage outlet.

Use pincers to cut away the three securing ribs of the continuous drainage outlet. Remove carefully without letting any debris fall inside.

The unit cannot operate without returning the tank.

Remove the water tank.

Insert the hose into the drainage outlet on the back.

Attach the tank and set the end of the hose in the drain.

Feed the commercially available hose (ID 15 mm) into the drainage outlet while keeping the stopper pressed

Feed the hose into the drainage outlet. Confirm that the hose is securely attached and does not leak.

Press drain stopper.

If a drain is available, the unit can continuously drain excess water by attaching a commercially available hose (internal diameter 15mm). The unit can be operated for extensive periods without the need to empty the water tank.

Push here

Stopper

Drain

∞ Confirm that the hose does not show signs of deterioration such as

bending cracks and clogging.

∞ Inspect the hose every 2 weeks. Insects or dirt blocking the hose may

cause leakage resulting in malfunctions.

Position of drainage outlet

221mm

114mm

Step 1) Remove the front pan assembly, rear

panel, and blower fan assembly as directed in Procedures 1 to 4.

2) Remove filament tapes from the left and

right hooks between the drain pan and base and from the middle (3).

With the heat exchangers (heat radiation, cooling) lifted on the right side, raise the drain pan upward to unhook it from the base.

4) Remove the drain pan assembly avoiding

the heat exchanger and piping.

(See Picture 14.)

Step 1) Remove the front pan assembly, rear panel, blower fan assembly, and drain pan assembly as directed in

Procedures 1 to 5.

(See Picture 14.)

2) Place a support on the right side of the heat exchangers (heat radiation, cooling), and remove the compressor

setscrews (3).

3) Hold the compressor and heat exchangers by hand, and release them from the base.

Repairable

parts

Compressor

CAUTION

Do not drain water continuously if there is a possibility that temperatures around the hose could drop below freezing point.

Water inside the hose may freeze and water may leak from the unit and

damage surrounding objects.

When draining water continuously or left unattended for long periods, inspect the unit once a fortnight.

Foreign objects, etc. could clog the hose resulting in overheating and/or leakage.

Note

Hose

• Commercially available hose (I.D. 15mm) Long enough to reach the drain

• Pincers

How to set up the drainage hose

• hose immersed in water

•

hose raised to a level higher than the drainage outlet

→ The water will

not drain.

Correctly installed

Incorrectly installed

Items to

prepare

Model MJ-E26VX-A1 Exploded View

Parts Catalog

1. If the part is out of production, you may be required to use a common part.

2. Parts found installed in products may have a different part number from service parts. However, there should be no difference inperformance and can be installed.

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 and are of critical importance for sustaining safety and performance. Use specified parts atreplacement.

4. When ordering parts without part numbers, use the design number. The order may take a while to process.

Part No.

Exploded

View

Matching No.

Part Name

Compatibility/Miscellaneous

Pc/1

unit

Safety

Part

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15

(expendable item)

Model MJ-E26VX-A1 Parts List

New

Parts Catalog

M22 B06 738

TANK-RX

180RX

M22 C52 320

COVER-TANK*E26VX-W

180VX

M22 B06 697

LID-TANK*RX

140/180RX

M22 B06 737

LID-TANK2*RX

140/180RX

M22 J90 379

FLOAT-P(X

)

ASSY

100P

M22 B26 233

CASE-F*180VX

M22 C52 310

PANEL-F*E26VX-W

M22 C52 468A

ESCUTCHEON-SW*E26VX-A

M22 C51 531M

PCA*MJ-E26VX*M

M22 B22 232

CASE-R*180VX

140TX

M22 B22 063

HANDLE-180VX

140TX M48 5C5 816 M22 C51 349

FILTER*180VX

M22 C52 440A

LOUVER-F*E26VX-W

180VX

SCW-PL-TBFZR 4×12 SCW-TBFN 3×10N

SCW-PL-TBFZR 4×12

SCW-TBFN 3×10N

SCW-MPFZR M4×14-TQRX

MJPR-18TXFT

M48 5C7 810

MJ-E100SPL

New

Be careful not to overtighten.

Model MJ-E26VX-A1 Exploded View

Parts Catalog

31 32

1. If the part is out of production, you may be required to use a common part.

2. Parts found installed in products may have a different part number from service parts. However, there should be no difference inperformance and can be installed.

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 and are of critical importance for sustaining safety and performance. Use specified parts atreplacement.

4. When ordering parts without part numbers, use the design number. The order may take a while to process.

Part No.

Exploded

View

Matching No.

Part Name

Compatibility/Miscellaneous

Pc/1

unit

Safety

Part

Model MJ-E26VX-A1 Parts List

20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

— —

New

M22 C51 200

BASE*TX

M22 B06 700

DRAINPAN-RX

1 140/180RX

M22 B06 081

BOX-PCA*RX

1 180RX

M22 B06 094

COVER-BOX*RX

1 180RX

M22 B61 113

CASING-180VX

1 180VX

M22 C44 620

STEPPING MOTOR*NX-R

1 E16VX-S

LEAD WIRE S/M*VX

M22 B26 394

DIVIDING-PLATE*180VX

1 180VX

M22 B22 298

DUCT*140/180TX

1 140TX

CUSHION-HEX-T*P(X

)

M22 B22 045

LOUVER-180VX

1 140TX

M22 J67 036

SUPPORT-LOUVER*N(X

)

1 100NX

M22 J90 512

NET*P(X

)

1 100P

M22 J90 128

SPRING-S*P(X

)

1 100P

M22 J90 788

STOPPER-PLATE*P(X

)

1 100P

M22 J67 923

PACKING-RUB

1 100NX

M22 B13 909

CASTER*SX(30

)

CUSHION-HEX-U*P(X

)

M22 C52 450A

NAME-PLATE*E26VX-A

M22 C52 936A

I.B*MJ-E26VX-A

SCW-SPL STOPPER

SCW-PL-TBFZR 4×12

SCW-TPFZR 3×8N

SCW-PL-TBFZR 4×12

SCW-TBFZR 4×8

Parts Catalog

Model

MJ-E26VX-A1 Exploded View

Model MJ-E26VX-A1 Parts List

1 2 3 4 5 6 7 8

9 10 11 12 13 14

A B C D E

New

1. If the part is out of production, you may be required to use a common part.

2. Parts found installed in products may have a different part number from service parts. However, there should be no difference inperformance and can be installed.

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 and are of critical importance for sustaining safety and performance. Use specified parts atreplacement.

4. When ordering parts without part numbers, use the design number. The order may take a while to process.

Part No.

Exploded

View

Matching No.

Part Name

Compatibility/Miscellaneous

Pc/1

unit

Safety

Part

Parts Catalog

M22 C51 531

PCA*MJ-E26VX*P

M22 B33 311

SENSOR*HUM-180WX

1 180WX

M22 C37 395

PLUG CORD*ETX-A1

M22 B03 500

FAN-R(X

)

ASSY

100RX

M22 C51 620

MOTOR-E26VX

M22 C51 260

HOLDING PLATE-M*WX-R

M22 B13 511

RUBBER MOUNT 14:04 P(X

)

180SX

M22 C51 502

LEAD WIRE -R/C*140TX

1 100TX

LEAD WIRE M-P*12P

LEAD WIRE M-P*8P

M22 C51 546

RUN CAPAITOR*E26VX

M22 C51 501

SWITCH-LEVEL*W(X

)

M22 B26 994

INS-PLATE-MICA*18

1 180VX

SCW-TBFZ 4×6 P TIGHT

M22 B30 792

NUT-LFZR M6

SCW-TPFZR 5×35M

SPL WASHER-R

SCW-PL-TBFZR 4×12

F G

SCW-TPFZR 3×8N

SCW-MPBN M4×6

MOTOR PROTECTOR*E26R

13 201914317 12 15

Model MJ-E26VX-A1 Exploded View

Parts Catalog

1. If the part is out of production, you may be required to use a common part.

2. Parts found installed in products may have a different part number from service parts. However, there should be no difference inperformance and can be installed.

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 and are of critical importance for sustaining safety and performance. Use specified parts atreplacement.

4. When ordering parts without part numbers, use the design number. The order may take a while to process.

Part No.

Exploded

View

Matching No.

Part Name

Compatibility/Miscellaneous

Pc/1

unit

Safety

Part

SCREW SEMS M4×0.7×6

Model MJ-E26VX-A1 Parts List

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

YB691VTE

Parts Catalog

M22 C44 629

SOLENOID COIL

1 E16VX-S

M22 C52 629

SOLENOID VALVE-R

1 100NX

M22 B03 655

DRYER*P(X

)

1 100RX

M22 C51 555

THERMISTOR-EVA*180WX

M22 B06 630

COOLER*180RX

1 180RX

M22 B06 620

CONDENSER*180RX

1 180RX

CLIP

M22 J16 018

TERMINAL COVER

1 63LGX

M22 J16 923

PACKING

1 63LGX

M22 C15 820

COMP*YB691VTE

PIPE IN COOL*P(X

)

1 160PX

M22 J67 653

JOINT

1 100NX

PIPE IN CON*180RX

CHARGE PIPE*180S(X

)

PIPE D-J*P(X

)

1 160PX

PIPE SV-C.T*P(X

)

1 160PX

PIPE C.T*RX

PIPE OUT CON*P(X

)

1 100P

PIPE SV-J*P(X

)

PIPE OUT COOL*180RX

M22 B06 654

PIPE DIS*180RX*ASSY

1 180RX

M22 B06 645

PIPE SUC*180RX*ASSY

1 180RX

PIPE COVER*COMP

1 100SX

11. Troubleshooting

Symptom

Cause/Remedy

The unit blows warm air

Water does not collect in the water tank (minimal dehumidifying results)

The unit does not operate (no air comes out) The unit stops

The humidity level does not reach the level set

The unit continues to operate even though it is turned off

The hygrometer reading on the unit differs from other hygrometers in the room

The louvre does not move as set

The water tank contains liquid or white water residue

There is black residue on the inside of the water tank and lid.

Louvre does not swing

Stops after a short time

¡ Dehumidified air passes through heating coils causing it to warm

(this unit is not a cooler). This is not a malfunction.

¡ Check to see if the temperature/humidity is low.

Low room temperature/humidity reduces dehumidifying effectiveness.

¡ Check to see if the power cord is correctly plugged.

➝ Plug the power cord properly into the power socket.

¡ Check to see if anything is blocking the air intake or outlet.

➝ Remove the obstruction.

¡ Check to see if the unit is in EASY DEHUMIDIFYING,

MILDEWGUARD, or AUTO. ➝ The unit is automatically controlling the dehumidifier, fan, and standby times.

¡ Check to see if the pre-filter is clogged.

➝ Clean according to the maintenance procedures.

¡ Check to see if the water tank is full.

➝ Empty the water tank and return it to its original position.

¡ Check to see if the water tank is inserted properly.

➝ Adjust the position of the water tank.

¡ Is the unit set to internal drying mode?

This function activates automatically after ending operations.

¡ Check to see if the unit is in defrosting mode.

The unit activates defrosting mode when the room temperature drops below 15°C. The dehumidifier and blower functions stop

during defrosting.

¡ Check to see if the room is not too large. ¡ Check to see if the exits to the room are open.

➝ Refrain from opening doors/windows during operation.

¡ Check to see if steam producing appliances such as kerosene

heaters are on in the vicinity.

¡ Hygrometer readings differ from place to place even if in the

same room. Use the unit humidity reading as an estimate.

¡ Press the Swing louvre switch again.

¡ The residue is from final product testing at the factory. It is not a

result of a malfunction.

¡ The residue is from debris in the air.

➝ Clean according to the maintenance procedures.

Lights

Indicates

Symptom

Cause/Remedy

¡ Check to see if the unit is on a slope or uneven surface.

➝ Move to a sturdy even surface.

¡ Check to see if the pre-filter is clogged.

➝ Clean according to the maintenance procedures

¡ Operating the unit in small rooms or in tight spaces sometimes

causes the sound to reverberate. ➝ Place a mat underneath the unit.

The unit makes noises

The operating noise is loud/reverberates

The operating sound suddenly increases in volume

The wind sound changes in volume

The unit produces a simmering sound

The unit produces a buzz that sounds intermittently (or the compressor does not activate)

The unit produces an odour

When first used

During internal drying

¡ The sound increases when the compressor activates (3 minutes

after turning on the unit or during Easy dehumidifying and Automatic modes).

The volume of the sound differs depending on the angle of the louvre.

¡ This is the sound of the refrigerant.

The sound can be heard while the refrigerant stabilizes after the unit turns on, changes modes, or stops.

¡ This is the sound of the compressor.

In modes that monitor the humidity level, or during drying inside the compressor operates intermittently causing the sound to be heard occasionally. The compressor does not activate after turning the unit off, or for 3 minutes after plugging the unit into a power socket. (This is to protect the compressor from damage.)

¡ The heat converter heats rapidly causing a brief odour. This is not

a malfunction.

¡ The moisture expelled from inside the unit may smell due to

odorants that were not caught by the photocatalytic filter dissolving in the water. This is not a malfunction.

Digital display

Cause/Remedy

or is displayed

¡ Error message (Humidity indicator)

is displayed

¡ Check to see if the power cord is plugged into the power socket

properly. ➝ Plug the power cord into the power socket properly.

¡ Check to see if anything is blocking the air outlet.

➝ Remove the obstruction, and plug the power cord into the

power socket again.

¡ Check to see if the pre-filter is clogged.

➝ Clean according to the maintenance procedures.

¡ Malfunction

➝ Take note of error message, unplug the power cord, and

contact the place of purchase.

If the symptoms persist even after following the prescribed remedies, or the error message does not disappear, unplug the power cord, and contact the place of purchase.

appears

Precautions

Do not start/stop the unit by plugging/unplugging the power cord.

This may result in fire and/or electric shock.

Do not use extension cords or multiple head adapters.

This may result in fire, electric shock or malfunctions.

Do not damage or modify the power cord or plug.

Do not modify, bundle, twist, bend or heat the power cord. Do not place under objects or use with the end close to the plug bent.

The cord may be damaged resulting in fire or electric shock. (Keep pets from biting the cord.)

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 to repair, disassemble, or modify the unit.

This may result in fire and/or electric shock. Refer servicing to your dealer or Mitsubishi Electric Service Centre.

Do not put the unit near heatgenerating devices (such as stoves, fan heaters, etc.).

The plastic parts may melt and cause fire.

Wipe dust off the power plug and insert the plug firmly.

If the plug is not fully inserted into the socket, dust may gather on the connectors which may cause fire and/or electric

shock.

Use 230-240V AC power sockets.

Connecting to power sockets other than 230240V AC may result in fire and/or electric

shock.

Remove water that has collected in the tank.

Accidentally drinking the water or using it for other purposes may cause illness and/or

unforeseen accidents.

Should abnormal symptoms occur (a burning smell, etc.), switch off the unit and unplug it from the socket.

Continuing to operate the unit may result in fire, electric shock, or malfunctions. Contact your dealer or Mitsubishi Electric Service Centre for consultation.

The following diagrams indicate circumstances where danger can result from mishandling the unit.

Meanings of the graphic symbols used in this manual and on the unit are explained below.

WARNING

Mishandling may result in fatal or serious injuries.

CAUTION

Mishandling may result in injuries or damage to your home or property, etc.

Always follow the instructions

WARNING

Forbidden

Keep away from fire

Do not disassemble

Do not subject to water

CAUTION

Do not cover the front or side air intakes or the air outlet with cloth, curtain, etc.

This results in poor ventilation and may cause heat generation/fire.

Do not stand on, sit on or lean against the unit. Do not pull the unit by the air outlet.

As the unit is on wheels, it may move, tip over, or fall causing personal injury.

Do not put vases or any other objects filled with water on the unit.

Water may leak into the unit adversely affecting electric insulation and cause electric shock

and/or fire by short-circuiting.

Do not use the unit where it may be exposed to direct sunlight or other weather conditions. (This unit is for indoor use only.)

This may cause overheating,

electric shock and/or fire

caused by an electric leak.

Do not use the unit in narrow, enclosed places such as inside closets, between pieces of furniture, etc.

This results in poor ventilation and may cause

heat generation and/or fire.

Do not use combustion appliances in the path of the air outlet.

This may cause

incomplete combustion

in the appliance.

Do not use the unit in places where chemicals are used (such as hospitals, factories, laboratories or beauty salons).

Chemicals and solvents evaporated in the air may harm the unit and cause water in the tank to leak, resulting in damage to property.

Do not use the unit for special purposes, such as preservation of food, art or scientific works.

This may negatively affect

the quality of the items stored.

Do not drain water continuously if there is a possibility that temperature around the hose could drop to freezing point.

Water inside the hose may freeze and prevent the water in the tank from flowing out. The water may leak from the unit and damage

surrounding objects.

Do not use the unit in places that may be subject to oil or flammable gas leakage.

Such a leak around the unit may cause

combustion and fire.

Do not remove the Styrofoam from the floating element.

The floating element will not be able to detect a full tank resulting in water leakage, which may

damage surrounding objects or cause

electric shock and/or an electric leak.

Do not wash the unit with water. Do not use the unit where it is likely to come in contact with water.

Exposure to water may result in fire or electric shock caused by an electric leak.

Do not point air-flow from the unit directly at the body.

If air-flow is directed at the body for long periods, it may harm

one’s physical

condition and lead to dehydration.

Grasp the plug and remove from the power socket.

When removing the plug from the power socket, do not pull on it diagonally or by the cord as this may cause the projections/wiring to be damaged resulting

in a short circuit, electric shock or fire.

Install the unit in a location where the floor is flat and stable.

If the unit falls over, the water collected in the water tank may leak damaging surrounding objects and in turn result in fire or electric

shock caused by an electrical leak.

Before moving the unit always switch it off, unplug it and remove water from the water tank.

Moving the unit with water in its tank may cause the water to leak and damage the

surrounding objects and in turn result in

electric shock and/or an electric leak.

CAUTION

After emptying the tank, transport the unit by grasping the handle firmly.

Losing your footing while carrying the unit may cause personal injury or

damage to the floor.

When using the continuous drainage outlet, make sure to position the hose so that the water drains without obstruction.

The water in the tank may leak and

damage surrounding objects.

When draining water continuously or left unattended for long periods, inspect the unit every two weeks.

Do not allow debris to clog the filter/hose as this may cause over-

heating/leakage.

Use 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.

Switch the unit off and unplug from the power source when cleaning it.

When the unit is on, the internal fan rotates at high speeds and may cause injury.

Unplug the unit from the power source when not using the unit for an extended period of time.

Otherwise it may cause fire and/or electric shock caused by an electric leak.

Precautions (cont.)

Warning

● 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.

● Damage to the dehumidifier caused by atmospheric conditions (ie. Salt or Sulphur) will not be covered under warranty.

● Do not carry the unit horizontally.

This may result in malfunctions. Such malfunctions are NOT covered under

warranty.

● The appliance is not intended for use by young children or infirm persons without supervision.

● Young children should be supervised to ensure that they do not play with appliance.

Issued in 2005.12 Printed in Japan

Mitsubishi MJ-E26VX-A1 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual