Mitsubishi MJ-E26VX-A1 User manual

ADVANCED AND EVER ADVANCINGMITSUBISHI 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
e_mj_e26vx_a1(01_23)33j.qk 05.12.20 10:15 AM ページ 1

2
1. Product Specifications
Auto-
dehumidification
* The brackets [ ] enclose values measured at a room
temperature of about 15°C or lower.
26.0
47
39
Single phase, 230-240V, 50Hz
415
1.9
8.5
White (W)
594 ×372 ×281
15.5
HFC - 134a, 275g
Slit fin
Slit fin
Thermal overcurrent relay
YB691 VTE (rotary)
240
Primary: 16.9 , subsidiary: 30
With temperature fuse
Sirocco fan
20
4
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 (m
3
/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

3
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
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
4
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.

5
¡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
Information
¡HIGH The dehumidifier operates regardless
of the humidity level. Airflow is strong.
ON 24 hours
Dehumidifies 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”
<Research paper by Dr. K. Abe of the Environmental Biology Research Center>
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
020 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.

6
¡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
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

7
¡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; compres-
sor activates (operating
sound)
Compressor operates
according to room temperature
Approx. 20min.
Compressor
stops
Airflow
Approx.
10min.
Unit
stops
auto-
mati-
cally
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.
<To deactivate automatic operation>
Press the MILDEW GUARD ELITE button while the
unit is on (the mildew guard elite lamp turns off)
e_mj_e26vx_a1(01_23)33j.qk 05.12.20 11:32 AM ページ 7

To cancel the OFF timer
<When you want to turn the unit off>
Press the POWER button. (Power off)
¡The OFF Timer is cancelled.
<When you want to disable the Timer OFF
mode, and continue operation>
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
Press
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
1Switch the power off.
2Set 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.)
3Select operating mode.
Select desired operating mode.
Set internal drying (auto) as desired.
4Change the louvre swing direction.
Select the desired setting.
5Confirm 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
1Switch the power on.
2Select operating mode.
Select desired operating mode.
3Change the louvre swing direction.
Select the desired setting.
4Set 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
Press
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
Information
8
43221
341・523

9
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.

10
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.
1The unit draws air from the room, cools it with
its cooling coil, causing the moisture to
transform into water droplets.
2The water droplets fall into the water tank.
3The 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.
W
h
y
a
r
e
t
h
e
y
d
i
f
f
e
r
e
n
t
?
<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

11
5.3 Coolant Circuit
Dehumidifying
Defrosting
Coolant flow
Blow
Fan
Heat exchanger (heat radiation)
φ 5
φ 6.35
φ 5
φ7.00
Compressor
Heat exchanger (cooling)
Intake
φ
9.52
Tube temperature
sensing thermistor
φ
6.35
Capillary tube
Capillary tube
φ
2.0 × φ 0.85 × 200
φ 5.0 × φ 4.0
φ 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.
0
2
4
6
8
10
12
14
16
18
20
22
24
26
510152025 30
Room temperature
Dehumidification capacity (L/day)
Temp. Temp.
e_mj_e26vx_a1(01_23)33j.qk 05.12.20 10:16 AM ページ 11

12
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.
1
Remove the photocatalytic filter.
2
Clean the pre-filter.
3
Floating element
Do not remove or dismantle.
Fit the photocatalytic filter.
4
Attach the pre-filter.
5
Remove the pre-filter.
1
Remove the photocatalytic filter.
2
Soak the photocatalytic filter in water.
3
Dry the photocatalytic filter.
4
Fit the photocatalytic filter.
5
Attach the pre-filter.
6
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.

3Reattach 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.
13
Pour the water out
as shown.
Removing Water from the Tank
1Remove 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
2Remove the tank lid, and empty.

14
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.
1Perform drying inside
Performing internal drying to prevent mildew
growth is recommended.
2Bundle
power cord.
3Remove the
drainage
water.
Empty the water tank and
wipe away any remaining
drops of water.
4Clean the
pre-filter.
Remove grit with
vacuum cleaner
5Store 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.
e_mj_e26vx_a1(01_23)33j.qk 05.12.20 11:33 AM ページ 14

15
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
P1
P11
P10
P100
P2 P3P5
P4
P20
P13
P 101
FM
S
C
R
CM SV
Blue Blue 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
White
White
Brown
Brown
Tank full switch
Stepping motor
SM
Gray
Gray
Power supply board
Gray
Gray
Run capacitor
Blue
Brown
Power plug
Thermistor (Tube
temperature sensing)
1 C (defrost)/12 C (end)

16
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
ON
OFF
High
HIGH

17
<Operation Control>
1Specifications 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.
2Humidity set operation
Compressor and blower fan operation will switch by current humidity and set temperature.
3High, Low, Low Temp, Mildew Guard, Air Purifier
Compressor
ON
Rank 3
Rank 1 Rank 2
Rank 3
Rank 5
Rank 5
Rank 0 Rank 0 Rank 0
27°C29°C
ON
OFF
Current humidity
– Set humidity
Decline in
current
humidity
+3%
–1%
34°C36°C
+5%
+1%
Rise in current
humidity
Fan temperature table
Compressor
Mildew Guard
Low Temp
ON
ON
Rank 4
Rank 4
Rank 4
Rank 6
Rank 4
Rank 5
Rank 5
Rank 4
Air Purifier OFF Rank 1 Rank 1
Rank 1
Rank 1
Low ON Rank 1 Rank 2 Rank 5
Rank 1
High ON Rank 4 Rank 4 Rank 5
Rank 4
Fan temperature table
27°C29°C34°C14°C16°C 36°C
4Mildew Guard mode
1. 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
ON
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%
ON
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

18
5Easy 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%.
0
60%
ON
ON
OFF OFF OFF OFF
ON
ON
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
ON
ON
Rank 3
Rank 1
Rank 3
Rank 2
ON
ON
Circulate
To
Dehumidifier
mode
To
Dehumidifier
mode
Rank 3Rank 0Rank 0 Rank 5
To
Circulate
mode
Rank 5
Rank 5
To
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

19
6Internal 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.
(c) Step 3 does not perform the tube temperature or room temperature check that accompanies a microprocessor reset,
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
(c) The following operations are performed when internal drying ends.
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 0
Rank 1
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
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

20
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 ON
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
ON
Mode
button
Mode
button
Mode
button
Humidity
set
Low (Continuous)
Max 3 min
Mildew guard Low temp Auto Humidity setting 60%
Dehumidification
stops
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF OFF
60% 59% 61%
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
0°C
12°C
ON
OFF
ON
OFF
ON
OFF
Stops at 90˚
Close
Humidity
set
Dehumidification
restarts
Easy
modes
Easy
modes
Power
OFF
3 sec standby Min 3 min
Humidity setting 55%
Easy dehumidifying
Laundry
Close Close