Sencor SDH 2028WH User manual

EN
SMART MOBILE DEHUMIDIFIER WI-FI
Translation of the original manual
SDH 2028WH
SDH 3028WH

SDH 2028WH
SDH 3028WH

A
1
2
3
4
5
67
8
9
B
Wi-Fi
TIMER
HIGH
LOW
DEFROST
OK
FULL
˚C
DRYING
%
FAN
DEHUMIDIFY
DRY CLOTHES
LOCK
POWER
1234 5 6 7 8 9
10 11 12 13
14 15 16 17 18 19

C
D
E

F

- 1 - 09/2023
2023, .
EN Smart Mobile Dehumidifier Wi-Fi
Important Safety Instructions
READ CAREFULLY AND STORE FOR FUTURE USE.
• This appliance may be used by children 8 years of age
and older and by persons with physical, sensory or mental
impairments or by inexperienced persons, if they are
properly supervised or have been informed about how to
use of the product in asafe manner and understand the
potential dangers.
• Cleaning and maintenance performed by the user must
not be performed by unsupervised children. Children must
not play with the appliance.
• If the power cord is damaged, it must be replaced by an
authorised service centre or by another similarly qualified
person, this will prevent the creation of adangerous
situation. It is forbidden to use the appliance if it has
adamaged power cord.
• The appliance must be installed in accordance with
national installation codes.
• The appliance must be stored in amanner that prevents its
mechanical damage.
• The appliance must be stored in awell ventilated location,
where the dimensions of the room correspond to the
dimensions specified for its operation.

- 2 - 09/2023
2023, .
• The appliance must be stored in aroom where an
open flame is not continuously in use (e.g. running gas
appliance) or where there are sources of ignition (e.g.
running electrical heating element).
• Before connecting the appliance to apower socket, check that the rated voltage on its rating label matches the electrical voltage in the power socket.
• Connect the appliance only to aproperly grounded socket.
• The power socket must be freely accessible so that it is possible to quickly disconnect the power cord from the power source if necessary.
• The appliance is designed for use in household, offices and similar types of areas. Do not use it in rooms where it could be exposed to dripping or
spraying water, where it could be exposed to direct sunlight, in areas where chemical or explosive substances are stored, in industrial surroundings
or outdoors. Do not use it in the vicinity of abath, shower, swimming pool, etc.
• Do not place the appliance in the vicinity of an open flame or appliances that are sources of heat.
• Do not place the appliance on unstable surfaces such as carpets with very long and thick fibres.
• The appliance may only be used on adry, stable, smooth and horizontal surface.
• The appliance is equipped with travel wheels so pay extra attention when handling it so that it does not fall down stairs or travel down from sloped
areas. If necessary secure the wheels using the stoppers.
• Only use original parts to assemble the appliance. Before starting to assemble the appliance, make sure that it is turned off and disconnected from
the power socket.
• Prior to connecting the appliance to apower socket, make sure that the appliance is correctly assembled according to the instructions in this
user'smanual.
• Do not touch the appliance with wet or damp hands. This applies especially when it is connected to apower socket.
• Do not submerge the appliance in water or in any other liquid.
• Do not cover or insert anything into the air inlet or air outlet openings. This could damage the appliance.
• During operation, there must be sufficient space for air circulation with at least 30 cm of free space on all sides.
• Do not expose yourself to acold air current for along time. This could have anegative effect on your health.
• To turn the appliance on or off, always use the appropriate buttons on the control panel. Do not turn off the appliance by disconnecting the power
cord from the power socket.
• Always turn off the appliance and disconnect it from the power socket when leaving it without supervision, when not using it and before moving,
disassembling or cleaning it.
• Do not attempt to remove the outer case of the appliance.
• Unplug the appliance from the power socket by pulling the plug, not the power cord. Otherwise, damage to the power cord or the socket could occur.
• Do not use the appliance if damaged in any way, or with adamaged mains cable or plug.
• Store the appliance in avertical position. It may only be transported in the vertical position. If you have already used the appliance, check that all the
condensate has been drained. After transporting it, wait at least 1 hour before using the appliance.
• Do not use the appliance if it is not working correctly, if it has been damaged or has been submerged in water. To avoid ahazardous situation arising,
do not repair the device yourself or modify it in any way. Have all repairs or adjustments performed at an authorised service centre. By tampering
with the appliance, you expose yourself to the risk of losing your legal rights regarding faulty performance or warranty for quality.
• This appliance is intended for use by experts or trained personnel in stores, light industry and in agriculture, or for commercial use by ordinary
people.
Read this user'smanual carefully prior to
installing or operating your new appliance.
Make sure to keep it for future reference.
Read the technical documentation.
Read the user'smanual.

- 3 - 09/2023
2023, .
Fire hazard
The appliance contains aflammable
refrigerant. It is necessary to adhere to safety
instructions.
SPECIFIC INFORMATION FOR APPLIANCES USING REFRIGERANT GAS R290
• Carefully study all the warnings.
• For defrosting and cleaning, do not use any other tools than those recommended by the manufacturer.
• The appliance must be stored in aroom where there are no sources of ignition (e.g. open flame, gas appliance in operation, electrical heating
equipment in operation) in continuous operation.
• Do not puncture or burn the cooling circuit.
• It is necessary to take into consideration that refrigerants may be odourless.
• The appliance must be installed, operated and stored in aroom with afloor area greater than 3m2.
• This appliance contains 60g (SDH 2028WH)/74g (SDH 3028WH) of the R290 refrigerant gas.
• R290 is arefrigerant gas that meets European environmental protection directives. Do not drill into or damage any part of the cooling circuit.
• Sufficient ventilation must be provided in the room where this appliance is installed operated or stored. Otherwise, there is arisk of an explosion or
fire in the event that leaked refrigerant ignites, e.g. when agas cooker is turned on, etc.
• The appliance must be stored in such amanner that its mechanical damage is prevented.
• Persons working with or repairing cooling circuits must have appropriate authorisation issued by an authorised institution that certifies this
person'scompetence to work with refrigerants in accordance with the specific assessment of the association for this sector.
• Maintenance tasks must be performed solely on the basis of the recommendations of this appliance'smanufacturer. Maintenance and repair
tasks that required the contribution of other qualified expert personnel may only be performed under the supervision of specialised experts in the
flammable refrigerants sector.
• Check the rating label for the type of refrigerant gas used in your appliance.
• Do not cover the vents.
• Adhere to national codes relating to gas.

- 4 - 09/2023
2023, .
• Thank you for purchasing our SENCOR product; we hope you will be
satisfied with it.
• Before using this appliance, please familiarise yourself with the
user’smanual, even if you are already familiar with using similar
types of appliances. Use the appliance only as described in this
user'smanual. Keep the manual for future reference.
• We recommend to keep the original packaging, packaging materials,
receipt, and proof of the seller'sliability or warranty certificate for
aminimum of the duration of statutory right of faulty performance or
warranty of quality. When transporting the appliance, we recommend
packaging it again in the original box provided by the manufacturer.
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DESCRIPTION OF THE APPLIANCE
A1 Control panel
A2 Display (shows current air
humidity)
A3 Front panel
A4 Travel wheels
A5 Air outlet cover
A6 Handles (located on both
sides)
A7 Air intake grille with built-in
filter
A8 Condensate tank
A9 Drain hose connection outlet
Without illustration: power cord,
drain hose
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DESCRIPTION OF THE CONTROL PANEL
B1 Wi-Fi indicator light
B2 Timer indicator light
B3 Fan speed indicator lights
B4 Indicator light OK (indicates
reaching the set humidity
level)
B5 DEFROST indicator light
(indicates defrosting)
B6 FULL indicator light (full tank)
B7 Display (shows current
relevant humidity)
B8 Indicator light %
B9 °C indicator light (ambient
temperature display)
B10 DRYING indicator light
(dehumidifier drying)
B11 Operating mode lights
B12 Dehumidifier on indicator light
B13 Control panel lock indicator
light
B14 button: used to set the
timer
B15 button: used to set the fan
speed
B16 button: used toset the
humidity / extend the timer
operation
B17 button: used to set the
humidity / reduce the timer
operation
B18 button: used to select the
operating mode
B19 button: used to turn on/off
Note:
The combination of buttons and is used toactivate/
deactivate the child lock – see the instructions below for
more information.
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PURPOSE OF USE
The dehumidifier is used to reduce the humidity in theroom.
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BEFORE FIRST USE
• Before first use, remove the appliance and its accessories form the
packaging and remove all promotional labels and tags. Check that
neither the appliance nor any of its components is damaged.
• Pull out the condensate tank andremove the drain hose from the
condensate tank.
• After unpacking, let the dehumidifiers stand for 2 to 3 hours to allow
the refrigerant in the cooling circuit to settle.
• Transport the dehumidifier only in the vertical position. We do not
recommend transporting it in ahorizontal position or tilting it.
Note:
Do not travel over carpets, door thresholds or other
obstacles with the wheels. This may lead to their
damage.
Do not move the appliance when the condensate
tank is full.
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INSTALLATION LOCATION OF THE APPLIANCE
• Locate the appliance on an even, dry and stable surface within reach
of aproperly grounded power socket.
• Do not use the product outdoors.
• To ensure sufficient air circulation, please leave free space of at least
50cm at the back and 30cm on the sides of / above the appliance.
• Place the appliance in aroom where the temperature does not fall
below 5°C. Frost could form in the appliance if the temperature drops
below 5°C and the appliance would need to be defrosted.
• Do not locate the appliance in the vicinity of dryers, heating devices
and other sources of heat. Avoid location in direct sunlight.
• Do not use the appliance in locations where humidity could damage
books or other valuable items.
• The appliance must be used in aclosed room in order to ensure its
maximum effectiveness. Therefore, close the doors and windows of
the given room.
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OPERATING THE APPLIANCE
• The dehumidifier is used to reduce the humidity in aroom, e.g. to dry
out flooded cellars, rooms with increased humidity, etc. Do not use it
in areas where substances or objects are stored that require precise
temperature and humidity control in the room.
• Use the appliance at an ambient temperature 5 and 35°C and
humidity between 30% and 80%. These values will ensure the most
effective operation of the dehumidifier.
• Always wait at least 3 minutes before turning the appliance on again.
• Do not connect the appliance to apower socket to which another
appliance is already connected. We recommend connecting the
appliance to an independent circuit.
• Make sure that the condensate tank is correctly installed in the
appliance, otherwise the appliance may not function correctly.
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OPERATING THE APPLIANCE
Make sure that the appliance is located in asuitable place and that it is
correctly assembled. Then insert the power plug into apower socket.
Asound is made. The dehumidifier is in stand-by mode.
Air outlet cover
• Before turning on the dehumidifier, set the air outlet cover manually to
the desired angle.
• Carefully press on the back of the cover fromboth sides to open it.
Manually set it to the desired angle: 30°/60°/90°
(see Figure C).
• Press both sides of the swing to manually set the wing to the desired
angle.
Warning:
Do not use the dehumidifier with the cover closed.
If the dehumidifier is inoperation with the cover
closed, an audible warning sounds after awhile and
the dehumidifier then switches off. This is asafety
feature to protect the dehumidifier from overheating
and damaging.
EN
Smart Mobile Dehumidifier Wi-Fi
User’sManual

- 5 - 09/2023
2023, .
Turning on/off
• Press the button to turn on the dehumidifier. An audible warning
will sound once. The power indicator light will be lit. The button
lights up green.
• The dehumidifier starts automatically in the default dehumidification
mode (default relative humidity 40%). The display will show the
humidity in the room and the fan will start running.
• If you need to turn off the appliance, press the button and the
indicator light will turn off. The button will light up red. The
dehumidifier is now in stand-by mode.
• If you need to turn the appliance off completely, pull the power plug
out of the power socket.
• The operation of the dehumidifier will stop automatically if the
condensate tank is full or incorrectly installed.
Note:
After turning off the dehumidifier with the button,
the appliance will run for about 1 minute and then
switch off (except in the fan mode). This is anormal
occurrence.
If you turn off the dehumidifier while it is in continuous
dehumidification or laundry drying mode, the fan will
continue to run for about 3 minutes after it is turned
off. This is anormal occurrence.
If you select the dehumidifier drying function, the fan
will run for 5 minutes after the dehumidifier has been
turned off.
Operating Mode Selection
Press the button repeatedly to select one of theoperating modes:
–DEHUMIDIFY (dehumidifier mode)
–FAN (fan mode)
–DRY CLOTHES (laundry drying mode)
Each press will illuminate the light of the selected mode.
1. Dehumidifier Mode (DEHUMIDIFY)
This mode is suitable forensuring constant removal of air humidity. We
recommend connecting the drain hose to ensure constant drainage of
condensate – see chapter “CONTINUOUS CONDENSATE DRAINING
VIA THE DRAIN HOSE” for more information.
• Repeatedly press the button until the DEHUMIDIFY light comes
on. The display will show adefault humidity of 40% and ahigh fan
speed will be set.
• Use the / buttons to set the desired humidity between 35 and
85%.
• Press the button repeatedly andselect the fan speed: HIGH or
LOW. Each time the button is pressed, the respective indicator will be
lit on the control panel.
• When the relative air humidity goes down to the set level (tolerance +
3%), the compressor switches off and the fan speed goes down to the
low speed (if it was set to high).
• When the relative air humidity increases above the set level (≥ 3%),
the compressor will start and the fan will run at the set speed.
• If the relative air humidity is within +/- 3% of the set humidity level, the
dehumidifier will operate continuously.
• When the relative air humidity reaches the set level, the OK indicator
light comes on. When the relative air humidity changes beyond the
tolerance, the indicator light OK goes out.
• The display in dehumidifier front part is displayed in 3 colours
depending on the humidity. It appears red when the relative humidity
is higher than 65%; green when the relative humidity is between 45%
and65%; andblue when the relative humidity is lower than 45%.
• If the set humidity is less than 35%, “CO” (continuous
dehumidification) will be displayed, regardless of the achieved
humidity in theroom. The compressor will be in constant operation
regardless of the set humidity. The fan speed can be adjusted. It is also
possible to activate the child safety lock andset the timer.
2. Fan Mode (FAN)
Inthis mode, only the fan is inoperation and the compressor is turned off
(no dehumidifying). It is possible to set the fan speed, but it is not possible
to set the relative humidity. The display will show the relative ambient
humidity from 30% to 90%.
• Press the button repeatedly until the FAN light comes on.
• Press the button repeatedly the select the required fan speed:
HIGH or LOW. Each time the button is pressed, the respective indicator
will be lit on the control panel.
3. Laundry Drying Mode (DRY CLOTHES)
This mode is suitable for drying laundry athome. In this mode, the
compressor is always running and the fan speed is automatically set to
high regardless of the relative humidity in the room. To protect against
damage, the compressor starts withathree-minute delay. The fan speed
and the humidity level in theroom cannot be set. The ambient relative air
humidity level (30–90%) will appear on the display.
• Press the button repeatedly until the DRY CLOTHES light comes on.
• The dehumidifier switches to this mode. The fan starts running at high
speed and the compressor starts 3 minutes later.
Automatic Turning Off
The dehumidifier is equipped with automatic turn-off feature after the
set time.
1. While the dehumidifier is inoperation, press . The front display
will flash and the timer indicator light comes on.
2. Use the / buttons to set the desired time between 0 and 24
hours.
Wait for the set time on the display to stabilise and the countdown
will start automatically.
3. After the set time has elapsed, the dehumidifier turns off and enters
standby mode.
• If you need to check the automatic turn-off time, press the button
briefly. The display in the front part will flash briefly and the remaining
time until the automatic shut off will be shown. Wait until the time has
stabilized and the countdown will continue.
• If you need to cancel the automatic shutdown function, press the
button briefly. The display in the front part flashes briefly. While it is
blinking, press the button again and the timer will be cancelled.
Control Panel Lock
• The lock enables the control panel elements to be locked in order to
prevent accidentally changing your settings.
• Hold down the and buttons simultaneously to enable the
control panel lock. The control panel lock light comes on. All the
buttons on the control panel will be inactive.
• To deactivate the lock, hold down the and buttons
simultaneously. The lock will be cancelled and the lock indicator light
on the control panel will turn off.
Temperature display
• To check the ambient temperature, hold down the and buttons
simultaneously. The display will show ambient temperature and the
indicator light °C comes on. After 10 seconds, it will automatically
switch to the humidity display state.
Turning the display off
• If you need to turn the display on the front of the dehumidifier off, hold
down the button . The display will turn off.
• If you need to turn the display back on, hold down the button .

- 6 - 09/2023
2023, .
CONTROL THROUGH THE Sencor HOME APP
The dehumidifier can be controlled via the Sencor HOME application.
Download the application to your smart phone, register yourself and
control the dehumidifier via the application.
• If you already have the application installed, add the dehumidifier to
your devices.
Adding the Dehumidifier to the Device List via Bluetooth
You can add the mobile air conditioner to the Sencor HOME application
by pairing it via Bluetooth.
1. Turn on the Bluetooth function on your mobile phone.
2. Turn on the dehumidifier.
3. Open the app and on the app'shome page, click the “+” icon in the
top right corner.
4. The device itself will offer the “Add Device” option.
5. Click and the app will automatically guide you through adding it.
Note:
If the Bluetooth connection fails or is not possible, make
sure there are no solid obstacles between your phone and
the convector and that the two devices are close together.
Adding the Dehumidifier to the Device List via aQR code
• The dehumidifier can also be added to the Sencor HOME application
using the QR code provided below. On the app'shome page, click the
“+” icon and in the top right corner of the add device screen, click “[-]
Scan QR Code”.
• You will be prompted toreset the device. Hold down the button for
about 5 seconds. The Wi-Fi indicator light is blinking. This means that
the dehumidifier is ready to be paired. Instructions can also be found
on the application screen.
• Inthe app, confirm that the (Wi-Fi) light is flashing, then click “Next”.
• The process of adding the device starts. Wait until the dehumidifier
is paired.
• In the device list on the main screen, click on the icon of the
dehumidifier to enter control interface.
QR Code for Adding the Dehumidifier Control Panel to the Sencor HOME
SDH 2028WH and SDH 3028WH App.
SDH 2028WH SDH 3028WH
Manually Adding the Dehumidifier to the Device List
• Inthe upper right corner of the main screen, click “Add device” or “+”,
then click “Add device”.
• Ascreen with appliance categories and alist of appliances will appear.
• Click “Air quality” and select the convector model from the product list.
• You will be prompted toreset the device. Hold down the button for
5 seconds. The Wi-Fi indicator light is blinking. This means that the
dehumidifier is ready to be paired. Instructions can also be found on
the application screen.
• Inthe app, confirm that the (Wi-Fi) light is flashing, then click “Next”.
• On the next screen, you will be prompted toselect aWi-Fi network.
Select the network, enter your password andclick “Next”.
• The process of adding the device starts. Wait until the convector is
paired.
• In the device list on the main screen, click on the icon of the
dehumidifier to enter control interface.
Wi-Fi Reset
While the dehumidifier is in operation, hold down the button for at
least 5 seconds. The Wi-Fi settings will be reset and the Wi-Fi icon will
flash quickly (twice per second).
Full Tray Indicator (Fig. D)
• If the condensate tank becomes full while the dehumidifier is in
operation, the compressor and the fan will stop running, an audible
warning will sound and the full tank indicator light will flash on the
control panel. "FL" will appear on the front display.
• Carefully pull the condensate tank from the back of the dehumidifier
and pour out the condensate. Insert the tank back. Make sure that the
condensate tank is inserted properly.
• When the condensate tank is reinstalled, the dehumidifier will
automatically resume operation. When the dehumidifier is in the
dehumidification mode, the compressor will start only after 3 minutes.
DRYING FUNCTION
• While the dehumidifier is turned on, hold down the button for
3seconds until the "DRYING indicator light comes on.
After the dehumidifier is turned off, only the fan will remain inoperation
for 5 minutes. During this time, the excess moisture inside the
dehumidifier that has not been drained during normal operation will be
automatically removed. Therefore, we recommend that you select this
function before storing the dehumidifier for aprolonged period of time.
Note:
The feature is factory disabled and must be always
selected manually.
Continuous condensate draining via the drain hose (Fig. E)
Adrain hose must be connected for continuous condensate drainage.
Proceed as follows:
1. Remove the plastic plug at the rear of the outlet. Store the well for
future use.
Note:
If there is water in the outlet after removing the plug, wipe it
with adry cloth.
2. Insert the end of the drain hose into the outlet. The internal diameter
of the drain hose is 10 mm. Make sure the hose end is properly
inserted to prevent condensate leakage.
3. Locate the free end of the hose so that the condensate can flow out
freely. The container or the place where the condensate is drained
must be lower than the outlet. Do not bend the hose or step on it.
Note:
When not using the drain hose for continuous draining of
condensate, remove it, wipe away any water and close the
outlet using the plug.
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2023, .
CLEANING AND MAINTENANCE
Before cleaning, unplug the power cord from the mains socket.
Note:
To clean any appliance parts, never use cleaning
agents with abrasive effects, thinners etc. that could
damage the appliance surface.
Warning:
To prevent the risk of electric shock, do not submerge
the appliance, plug or power cord in water or any
other liquid.
Cleaning the Condensate Tank
• Empty out the condensate tank whenever you finish using the
appliance and wipe it using awiping cloth.
• To prevent undesirable bacteria, micro-organism or moulds from
multiplying inside the tank, clean it out at least once per month using
acloth dampened in lukewarm water with the addition of neutral
detergent. Then rinse it out thoroughly using clean water, wipe it dry
and insert it back into the appliance.
• Do not wash the condensate tank in adishwasher.
Cleaning the protective filter grille
• Check and clean the protective grille at least once every two weeks, or
more often if you use the appliance every day.
• Remove the protective filter grille from thedehumidifier (Fig. F).
• You can remove the dust using abrush with gentle bristles. If the filter
grille is more heavily soiled, you can vacuum up the dust and dirt
using the vacuum cleaner at its lowest setting with the upholstery
brush fitted. Alternatively, you can soak the filter grille in warm water
(water temperature maximum 40°C) anduse asoft sponge to clean
it. Leave in adry, shady and well-ventilated place to dry. Do not use
adryer or hair dryer to dry. Do not dry in direct sunlight. Make sure the
filter grille is completely dry before inserting it into the appliance.
• Install back in place.
Warning:
Do not use the appliance without the protective filter
grille properly installed. Do not wash the protective
filter grille in adishwasher.
Cleaning the Outer Case
• To clean the outer casing, use acloth slightly dampened with
lukewarm water and alittle dishwashing liquid. Make sure that water
does not enter into the vents. In the event that air inlet and outlet grilles
are only dusty, you may clean them with avacuum cleaner.
Storage
• When not using the appliance for an extended period of time,
disconnect the power plug from the power socket and clean it
according to the instructions provided above.
• Clean the condensate tank only 24 hours after turning the appliance
off since asmall amount of condensate may accumulate even during
this time.
• Store the appliance in adry, clean, and well-ventilated place away
from extreme temperatures and out of the reach of children or pets.
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TROUBLESHOOTING
Problem Cause Solution
The dehumidifier is
emitting hot air.
This is anormal occurrence. Dehumidified air
passes through aheating element, whereby the
air is heated up (without the cooling function).
The dehumidifier
didn't turn on.
The dehumidifier is not
connected to amains
socket.
Insert the power
plug into aproperly
grounded power
socket.
Condensate tank is full. Empty the condensate
tank.
The condensate tank is
not inserted correctly.
Insert the tank
correctly into the
dehumidifier.
The dehumidifier
is not removing
humidity from the
room.
Temperature and
humidity in the room
are low.
If the temperature
and humidity in the
room are low, reduce
dehumidification
power. Check the
temperature and
humidity in the room.
As arule, humidity will
be higher during the
cooler months. This is
not adefect.
The air outlet or air
inflow is blocked.
Eliminate the cause of
the blockage of the air
outlet or inlet.
The dehumidifier
does not exhaust air.
The protective filter
grille is dirty.
Clean the protective
filter grille.
The dehumidifier is
noisy.
The dehumidifier is
located on an uneven
floor, is tilted, or is
located on an unstable
surface.
Place the dehumidifier
on aflat, firm and
stable surface.
The protective filter
grille is dirty.
Clean the protective
filter grille.
In the event that the problem persists, or is not listed in the table above,
stop using the appliance and contact an authorised service centre.
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TECHNICAL SPECIFICATIONS
SDH 2028WH
Power 220–240V~, 50Hz
Dehumidification capacity 20l / 24h (30°C/80%)
Rated power input 360W
Rated current 1.9A
Energy factor EEV 1.55 l/kWh
Starting current 7.6A
Fuse type and current value Tube fuse 2A
Condensate tank capacity 6l
Coolant type and weight R290/60g
GWP (global warming potential) 3
CO2equivalent (t) 0.00018
Air flow volume 220m3/h (high)
Noise level 43/41dB (A) (high/low speed)
Dimensions 335×530×260mm
Net/gross weight 12.65/13.85kg
Operating temperature 5–32°C
Recommended room area 25–60m2

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2023, .
SDH 3028WH
Power 220–240V~, 50Hz
Dehumidification capacity 30l / 24h (30°C/80%)
Rated power input 420W
Rated current 2.1A
Energy factor EEV 1.74l/kWh
Starting current 9.5A
Fuse type and current value Tube fuse 2A
Condensate tank capacity 6l
Coolant type and weight R290/74g
GWP (global warming potential) 3
CO2equivalent (t) 0.000222
Air flow volume 250m3/h (high)
Noise level 43/41dB (A) (high/low speed)
Dimensions 335×530×260mm
Net/gross weight 15.3/16.5kg
Operating temperature 5–32°C
Recommended room area 30–89m2
We reserve the right to change the text and technical specifications.
SENCOR hereby declares that the SDH 2028WH and SDH 3028WH
radio device types comply with Directive 2014/53/EU. For the full version
of the EU declaration of conformity, please refer to
www.sencor.eu.
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INSTRUCTIONS AND INFORMATION ON DISPOSAL OF USED
PACKAGING MATERIAL
Dispose of used packaging material at asite designated for waste in your
municipality.
DISPOSING OF USED ELECTRICALAND ELECTRONIC EQUIPMENT
This symbol on the products or accompanying documents
indicates that used electrical and electronic products
should not be disposed of with regular municipal waste.
For proper disposal and recycling, take these products to
designated collection points. Or in some European Union
states or other European countries the products can be
returned to the local retailer when buying an equivalent
new product. Disposing of this product correctly helps save
valuable natural resources and prevents damage to the environment by
improper waste disposal. Ask your local authorities or collection facility for
more details. In accordance with national regulations penalties may be
imposed for the incorrect disposal of this type of waste.
For Business Entities in European Union States
If you want to dispose of electric or electronic devices, ask your retailer or
supplier for the necessary information.
Disposal in Other Countries Outside the European Union
This symbol is valid in the European Union. If you wish to dispose of this
product, request the necessary information about the correct disposal
method from the local council or from your retailer.
This product complies with all the essential requirements of
the EU directives that apply to it.
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SERVICING INSTRUCTIONS
• The service manual is intended only for qualified personnel with
authorisation for handling flammable refrigerants.
1.1 Area check
Before starting work on asystem containing flammable refrigerants,
safety checks are necessary to ensure that the risk of ignition is
minimised. When repairing acooling system, the following measures
must be adhered to prior to performing any work.
1.2 Work procedure
Work must be performed following acontrolled procedure so that the risk
of flammable gases or fumes being present during this time is minimised.
1.3 General work area
The whole maintenance crew and other personnel at the site must be
informed about the nature of the works being performed. Work in tight
areas must be prevented. The area around the work site must be divided
into sections. It must be ensured that the conditions inside the area are
safe by means of inspections of flammable materials.
1.4 Check for presence of arefrigerant
The area must be checked using an appropriate detector for the presence
of refrigerant before and during work to ensure that technicians are aware
of apotentially flammable atmosphere. It must be ensured that the
device used for the detection of leaks is suitable for use on flammable
refrigerants, i.e. non-sparking, appropriately sealed or intrinsically safe.
1.5 Presence of afire extinguisher
In the event that any work is performed on the cooling device or
associated parts under heat, then asuitable fire extinguisher must be on
hand. In the vicinity of the filling area, there must be apowder or CO2fire
extinguisher.
1.6 No ignition sources
No person performing work related to the cooling system that
encompasses the uncovering of any pipes that contain or have contained
flammable gasses may use any ignition sources in amanner that could
lead to afire or explosion hazard. All possible ignition sources, including
the smoking of cigarettes should be kept at asufficient distance from the
installation, repair, removal or disposal location, during which flammable
refrigerant could potentially be released into the surrounding environment.
Prior to starting work, the area around the appliance must be checked to
ensure that there are no fire hazards or ignition risks present. A“smoking
forbidden” sign must be installed.
1.7 Ventilated area
It must be ensured that the area is ventilated or appropriately ventilated
prior to penetrating the system or performing any work under heat.
The intensity of ventilation must continue for the time that works are
performed. Ventilation should safely dissipate any released refrigerant
and draw it out into the atmosphere as apriority.
1.8 Cooling system checks
In places where electrical components are replaced, these components
must be suitable for this purpose and conform to correct specifications.
The manufacturer’sinstructions for maintenance and service must
always be followed. If any doubts arise, it is necessary to request help
from the manufacturer’stechnical department.
• On installations containing flammable refrigerants, it is necessary to
perform the following checks:
– the amount of refrigerant corresponds to the size of the room in which
components containing refrigerant are installed;
– ventilation systems and outlets are in full working order and are not
clogged;
– if any indirect cooling circuit is used, the second circuit must be
checked for the presence of refrigerant;
– the markings on the appliance must remain constantly visible and
legible, and marking and signs that are illegible must be repaired;
– The cooling pipes and components are installed in locations where it
is not probable that they will be exposed to any substances that could
corrode the parts containing refrigerant, unless these components are

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2023, .
built using materials that are inherently resistant to corrosion or are
appropriately protected against corrosion.
1.9 Electrical device check
The repair and maintenance of electrical components must include safety
checks and inspections of components.
In the event of amalfunction that could affect safety, no electrical power
may be connected to the circuit until the malfunction is satisfactorily
resolved. In the event that the malfunction cannot be immediately
repaired but it is necessary to continue running the appliance, an
appropriate temporary solution must be used. The owner of the appliance
must be informed in such away that all parties know about it.
The initial safety check must ensure:
• that capacitors are discharged: this must be performed in asafe way
to prevent the possibility of sparking;
• that no electrical components or wiring is uncovered during the
process of filling, draining or cleaning the system;
• that the grounding is not interrupted.
2. Repair of sealed components
When repairing sealed components, all the electrical power supply must
be disconnected from the appliance on which work is being performed
before sealed lids, etc. are removed. When it is absolutely necessary
to have live power supply going into the appliance while servicing the
appliance, it is necessary to install apermanent device in the most critical
point to detect leakage so that adangerous situation is averted.
Special attention must be paid to ensuring that as aresult of the work
performed on electrical components the cover is not changed to
the extent of affecting the level of protection. This must also include
damage to cables, excessive number of connections and terminals not
performed according to original specifications, damaged gaskets, incorrect
configuration of plugs, etc.
It is necessary to ensure that the appliance is mounted safely.
It is necessary to ensure that gaskets or sealing materials are not
damaged in such away that they no longer serve to prevent the
entry of aflammable atmosphere. Spare parts must conform to the
manufacturer’sspecifications.
Note:
The use of silicone gaskets and seals may suppress
the efficiency of certain type of leak detection devices.
Intrinsically safe components do not need to be
disconnected prior to being worked on.
3. Repairs of intrinsically safe components
No permanently inductive or capacitative load may be placed on the
circuit without it being ensured that thereby the permitted voltage and
current for the used appliance is not exceeded.
Intrinsically safe components are the only type on which it is possible to
work in aflammable environment even while under live current. Testing
equipment must have correct specifications.
Parts are replaced using only parts specified by the manufacturer.
Different parts could result in ignition of refrigerant upon leakage into the
environment.
4. Cabling
Check that cabling is not exposed to wear and tear, corrosion, excessive
pressure, vibrations, sharp edges or any other negative environmental
effects. This check must also take into consideration the effects of ageing
and permanent vibrations from sources such as compressors or fans.
5. Detection of flammable refrigerants
Under no circumstances may potential sources of ignition be used for
locating or detecting refrigerant leaks.
Ahalogen burner (or any other type of detector utilising an open flame)
must not be used.
6.Leak detection methods
The following leak detection methods are considered acceptable for
systems containing flammable refrigerants.
For the detection of flammable refrigerants, electronic leak detectors
must be used, however their sensitivity may not be appropriate or they
may require recalibration. (Detection equipment must be calibrated in
an area without any refrigerant present). It is important to ensure that
the detector is not apotential ignition source and that it is suitable for
the used refrigerant. The leak detector must be set to apercentage of
LFL refrigerant and must be calibrated for the used refrigerant and the
respective gas percentage is confirmed (maximum 25 %).
Leak detection liquids are suitable for use on most refrigerants, however,
detergents containing chlorine must be excluded since chlorine may react
with the refrigerant and corrode copper pipes.
In the event of asuspected leak, all open flames must be removed/
extinguished.
In the event that the refrigerant leak is found and requires hard soldering,
then all the refrigerant must be drained from the system or separated (by
closing avalve) in apart of the system distant from the leak. The system
must then be cleaned out using oxygen-free nitrogen (OFN) both before
as well as after the hard soldering process.
7. Collection and pump discharge
In the event that the cooling circuit is breached due to repairs – or for
any other reason – conventional procedures must be followed. It is,
however, important to adhere to the best method due to flammability. It is
necessary to adhere to the following procedure:
• collect the refrigerant;
• clean out the circuit using inert gas;
• pump out;
• again clean out using inert gas;
• open the circuit by cutting or hard soldering.
The contents of the circuit must be collected into correct collection
cylinders. The system must be “flooded” with OFN (oxygen-free nitrogen)
for the unit to remain safe. It may be necessary to repeat the procedure
several times. For this task, neither compressed air nor oxygen may be
used.
Flooding may be achieved by disrupting the vacuum in the system with
the use of OFN, and by continued filling until the operating pressure
is achieved, then venting into the atmosphere and finally lowering to
avacuum. This process must be repeated if refrigerant still remains in
the system. When the last OFN cartridge is used, the system must be
ventilated to atmospheric pressure to enable work to be performed. This
activity is absolutely necessary if hard soldering is to be performed on
the pipes.
It is necessary to ensure that the vacuum pump outlets are not nearby to
any ignition source, and ventilation must be provided.
8.Filling procedure
Apart from conventional filling procedures, also the following
requirements must be adhered to.
– It is necessary to ensure that no contamination by various refrigerants
occurs when the filling device is used. Hoses or pipes must be as short
as possible to minimise the amount of refrigerant contained inside of
them.
– Cylinders must be held vertically.
– It is important to ensure that the cooling system is grounded prior to
being filled with refrigerant.
– When filling is complete, the system must be marked with alabel (if it
does not have one already).
– It is necessary to pay extreme care to ensure that the cooling system
is not overfilled.
Apressure test using OFN must be performed before refilling the system.
In the case of aleak, the system must be tested after being refilled but
also before being put into operation. Averification test must be performed
before leaving the installation location.

- 10 - 09/2023
2023, .
9.Taking out of operation
Prior to performing this procedure it is essential that the technician fully
acquaints him/herself with the device and all its particulars. Correct
practice of safely collecting all refrigerant is recommended. Prior to
performing this activity, oil and refrigerant samples must be taken if an
analysis is required prior to using the using the regenerated refrigerant for
the first time. It is essential that prior to starting this activity that electricity
is available.
a) Acquainting one’sself with the device and its activity.
b) Electrical disconnection of the system.
c) Prior to starting the procedure, ensure that:
• if required, mechanical device for handling the cylinder with refrigerant
is available;
• all personal protective devices are available and used correctly;
• the collection process is constantly under the supervision of
acompetent person;
• the collection device and cylinders comply with respective norms.
d) Pump out the cooling system if possible.
e) If achieving vacuum is not possible, collection pipes are created to
enable the collection of refrigerant from various parts of the system.
f) Ensure that the cylinder is placed on the scale before the collection
of refrigerant is started.
g) The collection device is turned on and runs according to the
manufacturer’sinstructions.
h) Cylinders are not overfilled. (No more than 80 % of liquid content
capacity).
i) The maximum operating pressure of the cylinder is not exceeded,
even temporarily.
j) When the cylinders are properly filled up and the procedure is
complete, ensure that the cylinders and devices are immediately
removed from the installation location and that all the separation
valves on the device are closed.
k) The collected refrigerant must not be filled into adifferent cooling
system until it is cleaned and checked.
10. Marking with alabel
• The appliance must be marked with alabel indicating that it has been
put out of operation and is without refrigerant. The label must be
dated and signed. It is ensured that there are labels on the appliance
indicating that it contains flammable refrigerant.
11. Collection
When the refrigerant is collected from the system, either due to servicing
or when it is put out of operation, it is recommended to adhere to proper
practice and safely collect all the refrigerant.
When the refrigerant is transferred into the cylinders, it is necessary to
ensure that appropriate cylinders for collecting refrigerant are used.
It is necessary to ensure that there is asufficient number of cylinders
available to contain the complete contents of the system. All the cylinders
that are to be used must be intended for collecting refrigerant and be
marked with alabel for this refrigerant (i.e. special cylinders for collecting
refrigerant). The cylinders must be complete with asafety valve and
associated closing valves in good working condition. The empty collection
cylinders are pumped empty and if possible cooled prior to collecting
refrigerant.
The collection device must be in good operating condition with aset of
manuals relating to the device, which are on hand and it must be suitable
for collecting flammable refrigerants. Apart from this, aset of calibrated
scales in good operating condition must also be available. Hoses must
be complete with couplers without seepage and in good condition. Prior
to using the collection device, check that it is in satisfactory operating
condition, has been properly maintained and all the associated electrical
components are sealed to prevent ignition in the event of refrigerant being
released. If in any doubt, consult the manufacturer.
The collected refrigerant must be returned to the refrigerant supplier in
the correct collection cylinder and with arespectively arranged waste
transport letter. Refrigerants are not to be mixed in the collection units and
especially not in the cylinders.
In the event that compressors or compressor oils are to be collected,
ensure that they are pumped out to an acceptable level in order to
ensure that flammable refrigerant does not remain in the lubricant. The
pump discharge process must be performed before the compressor is
returned to the supplier. To speed up this process, only electrically heated
compressor elements may be used. When the oil is drained from the
system, it must be disposed of safely.

FAST ČR, a.s.
U Sanitasu 1621
CZ-251 01 Říčany
www.sencor.eu