MDC20W-H Mitsubishi Heavy Industries Dehumidifier User Manual

MDC20W-H Mitsubishi Heavy Industries Dehumidifier

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Product Specifications

• Model: MDC20W-H, MDC25W-H, MDC30B-H

• Manufacturer: MITSUBISHI HEAVY INDUSTRIES-JINLING AIR
  CONDITIONERS CO.LTD.

• Power Supply: DC 12V

• Power Consumption: 3.6mW

• Dehumidifying Capacity: 50

• Weight: 8 lbs

• Dimensions: UV41101-00390

Product Usage Instructions

1. Unpacking: Remove the dehumidifier from its packaging and check
   for any visible damage.

2. Placement: Position the dehumidifier in a location with good
   air circulation and away from obstacles.

3. Power Connection: Plug the dehumidifier into a suitable power
   source using the provided DC 12V adapter.

4. Settings Adjustment: Set the desired humidity level between 30%
   to 80% using the control panel.

5. Operation: Press the power button to start the dehumidifier. It
   will automatically adjust its operation based on the set humidity
   level.

6. Maintenance: Regularly clean the air filters and empty the
   water tank to ensure optimal performance.

Frequently Asked Questions (FAQ)

Q: What should I do if the dehumidifier is not collecting

water?

A: Check if the humidity setting is too low or if the filters
are clogged. Adjust the settings and clean the filters as
needed.

Q: How often should I clean the filters?

A: It is recommended to clean the filters at least once a month
to maintain efficiency.

Q: Can I use this dehumidifier in a large room?

A: The dehumidifying capacity may vary based on room size. For
larger rooms, consider using multiple units for better
coverage.

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MDC20W-H MDC25W-H MDC30B-H
, , ,
Thank you for purchasing a MITSUBISHI HEAVY INDUSTRIES-JINLING AIR CONDITIONERS CO.LTD. Dehumidifier . To get the best long-lasting performance,please read and follow this User’s Manual carefully before using your dehumidifier . After reading,please store the Manual in a safe place and refer to it for operational questions or in the event of any irregularities.

……………………………………………………….. 1 ………………………………………………………..3 …………………………………………………… 4 …………………………………………………………….. 7 ……………………………………………….. 8 ……………………………………………… … 10 ………………………………………………………. 12
…………………………………………14 …………………………………………………………… 15 ………………………………………………… 16

50

UV
UV UV
UV41101-00390DC 12V, 3.6mW UV UV
2

Q:

Q:

“” ( 532) 5-3230%-80% 16-32
Q:

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5020

4

5

6

7

123 4

9 10 18 11 12 13 5 6 7 8

14 15 16

17 12 13

0

1

~ 241

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UV

UV3

3

4

30% -80%

5

5%

6

7

3

8
8

9

UV3

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UV UVUV

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12

,

13

,

14

3

15

16

17

18

9

[] 0241 240 5 “H” [] []5 >+5% <-5% +5%-5% 50% UV3 UV3( ) 3
10

UV

“SL” 50% 5 HR55% HR45% 55%HR45%,

HR65%

60%>HR40% HR<35%

35%~40% 60%~65%

11

1

( )

:
12

2

0.6 9.0mm 1116 1.062526.9811.5TPI

1 1

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13

:

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“”
,

:

5-32

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FL E1 E2 P1 L0 HI EF

,

16

Contents
Safety warning………………………………………………..17 Q&A………………………………………………………………… 19 Installation……………………………………………………. 20 Components……………………………………………………23 Control panel……………………………………………………. 24 Function description ………………………………………….. 26 Drainage……………………………………………………….. 29 Shoes drying kit and power cord storage………………. 31 Maintenance…………………………………………………. 32 Troubleshooting……………………………………………… 33

Safety Warning
For your safety, please read the following contents carefully before using this dehumidifier:
Requirements: Please place the appliance on a flat open area, and keep a distance of at least
50cm between the appliance and surrounding things. Do not place this dehumidifier in water or other liquids. If the power cord is damaged, in order to avoid danger, it must be replaced by a
professional from the manufacturer, its maintenance department or similar. The appliance should be installed in accordance with the appropriate national wiring
codes. When stop, reset or clean this dehumidifier, please cut off the power. Please use at the specified voltage. This dehumidifier can only be used indoor,please do not use for other purposes. Please do not place heavy objects on this dehumidifier. Please empty water tank to prevent overflow and spill before restarting this
dehumidifier. Please do not incline in case that the spilled water damages this dehumidifier. Please do not place waste rods and hard objects into the dehumidifier in case that
error and damage occur. When an abnormality occurs (such as a burning smell), please turn off the machine
and unplug the power cord. If the supply cord is damaged, it must be replaced by the manufacturer, its
service agentor similarly qualified persons in order to avoid ahazard. The user of this appliance must be at least 8 years old. The infirm, the weak sensory
ability or the low psychological quality must supervise the use under the condition of understanding the correct use method and harm. Children are not allowed to play. Children need to be supervised to clean and maintain this appliance.
Prohibition:
Please do not place this dehumidifier close to heating devices (flame or heaters,etc.). Please do not turn on or turn off this dehumidifier by plugging in or pulling out the plug. Do not use insecticide spray or other flammable substances in the vicinity of this
dehumidifier. Do not scratch appearance of this dehumidifier with sharp matters. Do not splash oil or water into this dehumidifier. Do not clean this dehumidifier with water, please wipe it with subhumid soft cloth. Do not wipe this dehumidifier with chemical solvents such as benzene, gasoline and
alcohol, etc. If this dehumidifier is indeed dirty, please wipe with neutral detergent. Please do not place this dehumidifier upside down.
17

Safety Warning
Maintenance:
Prior to cleaning or other maintenance, the appliance must be disconnected from the supply mains.
Unintended use of the appliance or damage to the housing may result in the escape of dangerous UV radiation. UV radiation may, even in small doses, cause harm to the eyes and skin.
The appliance must be disconnected from the supply before replacing the UV light. Before opening doors and access panels bearing the ultraviolet radiation hazard
symbol for the conducting user maintenance, it is recommended to disconnect the power. UV light model : 41101-00390, DC 12V, 3.6mW. UV barriers bearing the ultraviolet radiation hazard symbol should not be removed. Do not operate the UV light outside of the appliance.
18

Q&A
Q: Why is there less water in the dehumidifier water tank
in winter?
In winter temperature is low and air is dry. In comparison with summer, the dehumidification ability of the dehumidifier decreases remarkably,this is not a fault.
Q:Why the dehumidifier can not run or stops running
suddendly?
This dehumidifier may be full of water or water tank is not installed properly, drain the water in water tank, or re-install water tank in correct way.
At the moment the dehumidifier may be in the ” dehumidification mode “, the ambient temperature is lower or higher than its operation requested temperature ( dehumidification cannot be performed when the ambient temperature is5or32 ). This dehumidifier operation requested temperature is 5-32 , and the relative humidity is 30%-80%. The optimal temperature for use is 16-32.
Q:Why is hot air blown out from air supply outlet?
The machine extracts air from the room and cools it down by the dehumidification unit. It lowers the temperature below the condensation point and condenses into water droplets, which finally fall into the water tank. The dehumidified air is heated up by the temperature returning unit. This can reduce energy consumption, but also speed up the speed of dehumidification, so the discharge is hot air, which is not a fault.
19

Installation

Please drain the water from water tank before running. During running please do not open doors and windows as much
as possible since this can save energy resources.

is

and the minimum distance in front/rear and

is

in figure below

When big noise is found during

of this

: It

is

etc . below this

this can reduce

and

and can also reduce sinking of wood or carpet.

Minimum:50cm Minimum:20cm

Minimum:20cm Minimum:20cm

Minimum:20cm
20

21

choose whether to install or not

. User can

22

Components
Front side
Control panel Front panel
Back side
Air Intake Frame
Water level display
Wheel

Handle
Water tank handle Water tank cover
Water tank
Wind blade drying shoes cover Back panel Drain outlet Power cord storage cover Base plate
23

Control panel

123 4

9 10 18 11 12 13 5 6 7 8

Key Function

14 15 16

Display

Function

17 12 13
Description

Press this key to set the machine timing on/off. In the

timing mode, the adjustment time is from 0-24 hours,

1

Timer key adjust 1 hour per press. If you want to cancel the

timing setting, press the timing key when the timing

setting is confirmed.

Press this key to turn on/off the UV function, long

2

UV key

press this key for 3s to turn on/off the drying function

inside the machine.

Press this key to turn on/off the swing function; press

3

Swing key

and hold this key and the sleep key at the same time to turn on/off the Digital humidity indicator (LED

light) .

4

Sleep key Press this key to turn on / off the sleep mode.

Under auto dehumidification mode, the humidity can

5

Humidity be set between 30% -80%, and each press adjust 5% setting key humidity. Press this key and the fan speed key at the

same time to turn on/off the shoes drying function.

6

Fan speed key

In auto and continuous dehumidification modes, the wind speed can be selected between high speed and low speed.

During startup or timer startup, press this key to select

automatic dehumidification, continuous

7

Mode key dehumidification and other

modes. Press and hold the mode key 3S to turn on/off

the child lock function.

8

Power key Press this key to turn the machine on and off.

24

Control panel

Diplay Icon
Display
9

Function

Description

Inside

Under inside drying function display this icon long

drying icon press UV key for 3s to display.

10

UV icon

UV function operation indication pattern, press UV key to display this pattern.

11

Timer icon

Timing on/off function indication pattern, which can be displayed by setting the timing on/off.

The upper part is the automatic dehumidification

pattern, select the automatic dehumidification mode

12

Mode icon

to display this pattern; the bottom is the continuous dehumidification pattern, select the continuous

dehumidification mode to display this pattern.

The upper part is the high fan speed icon, select

13

Fan

the high fan speed to display this icon; the lower

speed icon part is the low fan speed icon, select the low fan

speed to display this icon.

14

Child lock icon

Child lock function operation indication pattern, press the mode key for 3S to display this icon.

15

Water full icon

This icon is displayed when the water tank is full of water.

16

Shoes drying icon

Shoes drying function operation indication pattern,
press the humidity setting key and the fan speed key at the same time to display this pattern.

17

Humidity icon Humidity display pattern.

18

Digital display area

Standby status and working status display ambient humidity, set status display set humidity, and timing status display timing.

25

Function description
Timer off setting When the dehumidifier is running, press the [Timer key] to adjust
time from 0h to 24h, pressing the key once to increase the setting time by 1h, after the setting time exceeds 24h, the figure returns to 0 to start cycle. The Timer key can also be pressed all the time, the time increases and changes circularly, when the set time expires, the dehumidifier turns off automatically. After the setting is completed, if the Timer key no action within 5s, the set time is confirmed. In timer off state, the Timer icon is continuously on.
Timer on setting When the dehumidifier is in standby state, the method for
adjustment of setting time by the [Timer key] is the same as timer off. After the setting is completed, if the Timer key no action within 5s, the set time is confirmed. In timer on state, the Timer icon is continuously on, and the set time is displayed on control panel. AUTO mode Select AUTO dehumidification, if the room humidity is 5% higher than the set humidity, the compressor will starts and the fan will run at the set speed. If the room humidity is lower than the set humidity by 5%, then the compressor will stop, the fan will keep running. If the humidity of the room is between +5% and -5% of the set humidity, the whole machine runs in the original operating state, and the initial value of the set humidity is 50%. CONTINUOUS mode Select CONTINUOUS dehumidification, no matter how the relative humidity in the room is, the compressor starts, the fan runs at high speed in default, fan speed can be adjusted.
26

I

drying mode

Press and hold the UV key for 3s to turn on the inside drying

funcon, which can prevent mildew growing in the machine. Press

and hold the UV key for 3s to turn off this funcon.

Child lock funcon Press and hold the mode key for 3S to turn on/off the child lock
funcon. (All keys on the operaon panel are disabled aer the child lock funcon is acvated). UV funcon

Shoes drying funcon Press the humidity key and the fan speed key at the same me to turn on or turn off the shoes drying funcon.
Sleep mode
When the sleep key is pressed to start the funcon, the display icon “SL” lights up ; Press this key again to exit the sleep mode, that is, to return to the state before the sleep funcon is started. When entering the sleep mode, the default display humidity is 50% and flashes. At this me, the humidity can’t be adjusted, and the wind speed is low. Aer 5 seconds of operaon, all the display lights go out and the funcons run normally.
27

Function description

At this me, the display will return to normal when any key is pressed. Press the key again to follow the key funcon. When the ambient humidity HR55%, the compressor starts and the fan runs in low wind; HR45%, then the compressor stops and the fan runs in low wind ; If it is in the intermediate state of 55%

HR > 45%, it will not be processed, and it will run in the current working state. In the sleep mode, if you want to turn on the shoe drying funcon, you can exit the sleep selecon shoe drying funcon. At the same me, when the water is full in the sleep mode, the water full alarm will not produce a beep.
Digital humidity indicator (LED light)
Press the Swing key and Sleep key at the same me to turn on or turn off the digital humidity indicator (LED light). It is used to illustrate the ambient humidity.

Digital Humidity Indicator Mechanism

Light color

Ambient humidity detected

Red

HR65%

Green

60%>HR40%

Blue

HR < 35%

Remarks: When powered on for the first me, it will display green color when the ambient humidity is in the range of 35%~40% and 60%~65%, and then judge and change color
according to the humidity change.

28

Drainage

1Use of water tank
When the water tank is full of water, the full water icon on display flashes (The machine will stop running at this me), the BUZZER sounds for 10 mes to remind the user ll water is drained.

Put your hand into the clasp under the side tank, and gently remove the tank
The water is poured out from the drain port.

Gently return the water tank to the
correct posion before turning on the dehumidifier again.

Aenon: when the water tank is full of water, please empty it. Before pung the water tank into the dehumidifier, please confirm whether the floater rotates flexibly or not, and then push it in posion.
29

Drainage

2Connuous drainage

If you don’t want to fill the tank frequently, you can connect the standard 0.6-meter drain pipe at the back of the unit. Garden hoses with standard threads can also be prepared with and outer diameter of 1 inch (1.0625 inches or 26.98mm) and a pitch of 11.5TPI.

1 Locate the drain outlet at the

1 Locate the drain outlet at the back,

back, unscrew the drain cover. or unscrew the drain cover.

2 Connect the 9.0mm water pipe to the drain.

2 Screw the standard threaded garden hose onto the threaded drain.

2

1

2 1

Aenon: The external drain pipe must not be too long (recommended length is less than 0.6 meters). The height of the end of the drain pipe must be more than 10cm below the height of the fuselage outlet. The drain pipe must be kept smooth, otherwise the water may not be drained normally.
30

Shoes drying kit and power cord storage
Shoes drying: The shoe drying connector can be combined with the shoe drying duct and the shoe drying head to form a shoe drying device. When using the shoe drying device, first open the drying shoe cover located on the rear panel, and then insert the shoe drying device into the air outlet on the rear panel. Aer drying the shoes, remove them one by one.
Shoe drying connector
Shoe drying duct
Shoe drying head To store the power cord: First put the plug of the power cord into the storage compartment, then coil up the cable body and put it in, and finally close the storage compartment cover. Conversely, when removing the power cord, the above steps are reversed.
Reminder: Please open the cover to the maximum for your convenience. In addion, please be careful not to rub your hands with the buckles to avoid scratching the skin.
31

Maintenance
Precautions:
Please disconnect power supply before maintenance or repair to prevent electric shock.
If the dehumidifier is not used for long me, please disconnect power supply. Please do not clean the dehumidifier body with chemical solvents such as
alcohol, gasoline and benzene, etc.
Please clean the water tank and its cover with soft cloth dipped in cold or warm water at regular time to prevent mould inside the dehumidifier.

Wipe the surface of the dehumidifier slightly with wet cloth, and do not use detergent or abrasive in case the plastic surface is damaged.

Clean the washable Air Intake Frame at least once every two weeks. Simply wash it with clean
water. Do not use chemical
solvents or hot water.

32

Troubleshooting

If the following problems occur to the dehumidifier, the following soluons can be adopted.

Symptoms

Possible reasons

Soluons

Does power plug fall?

Insert power plug into socket.

The dehumidifier does not run.

Is the water tank full of water? (the water tank is full of water or is placed at incorrect posion).

Drain water from the water tank, and then install the water tank again.

The ambient temperature is too low

or too high.

Recommend to use at 5-32 .

The
dehumidificaon funcon is not effecve.

Is the room temperature or humidity too low?

In dry season the dehumidificaon ability will reduce.

Are the air outlet and inlet blocked?

Clean up the objects blocking the air outlet and inlet.

Air is not blown out.

Is the air filter net blocked?

Clean the filter frame according to the above “Maintenance” page.

Noise is abnormal during operaon.

Is the dehumidifier placed improperly so that it is inclined or unstable.
Is the air filter net blocked?

There is “ering” sound.

Please place the dehumidifier in flat and smooth place.
Clean the filter frame according to the above “Maintenance” page.
The flowing sound of refrigerant, which is a normal phenomenon.

Water leaks

Connecon of drainage pipe becomes loose.
Drainage system is blocked.

Fasten drainage pipe.
Remove obstacles and straighten out water pipe.

Frosng occurs

The ambient temperature is low, and it is in the state waing for defrost.

It is a normal phenomenon,
and the dehumidifier has the automac defrosng funcon.

33

Troubleshooting

Display code:

Display code FL E1 E2 P1 L0 HI EF

Instrustion The water tank is full. The coil sensor detects abnormally. The room temperature sensor detects abnormally. The unit is in the defrosting state. Ambient temperature is too low. Ambient temperature is too high. DC fan motor occurs fault (Only applicable to DC fan motor type machine).

34

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