DF-HU28015 - Humidifier Cotech - Free user manual and instructions

Product Type	Humidifier
Brand	Cotech
Model	DF-HU28015
Dimensions (W x D x H)	Approx. 20 x 20 x 30 cm
Weight	Approx. 1.2 kg
Power Supply	AC 220-240 V, 50 Hz
Power Consumption	25 W
Water Tank Capacity	2.5 L
Mist Output	Up to 300 mL/h
Technology	Ultrasonic
Functions	Auto shut-off, adjustable mist, timer (optional), night light
Noise Level	< 38 dB(A)
Coverage Area	Up to 25 m²
Cleaning	Clean tank weekly; use vinegar solution for descaling
Filter Type	Replaceable (optional)
Safety Features	Overheat protection, safety switch when tank removed
Spare Parts	Replacement filters, water tank (if available)
Repairability	Basic components serviceable by technician
General Information	Designed for home use; suitable for dry climates

Frequently Asked Questions - DF-HU28015 Cotech

How often should I clean the humidifier?

It is recommended to clean the water tank and mist chamber weekly to prevent mold and bacteria growth. Use a mixture of water and white vinegar for descaling.

Can I use essential oils in the humidifier?

No, this humidifier is not designed for essential oils. Adding oils may damage the unit and void the warranty. Use only clean water.

Why is the humidifier not producing mist?

Check that the water tank is properly seated and contains enough water. Clean the ultrasonic disc with a soft cloth. If the issue persists, ensure the unit is on a flat surface.

What type of water should I use?

Use distilled or demineralized water to reduce white dust buildup. Tap water may cause mineral deposits and reduce performance.

Is the humidifier safe to use around children?

Yes, the unit includes an auto shut-off when the water tank is empty or tipped over. However, keep the appliance out of reach of children to avoid accidents.

How do I adjust the mist level?

Turn the mist control knob on the front panel to increase or decrease the output. Some models have a separate button for high/low modes.

What does the 'clean me' indicator mean?

The clean me light activates after a certain number of operating hours. It reminds you to descale and clean the unit for optimal performance.

Can I leave the humidifier running all night?

Yes, the unit is designed for continuous use. It features a whisper-quiet operation and auto shut-off when water runs out, making it safe for overnight use.

How often should I replace the filter?

If your model uses a filter (optional), replace it every 1-3 months depending on water quality and usage frequency. Refer to the manual for part number.

What is the power consumption of the humidifier?

The unit consumes 25 watts during operation, making it energy-efficient. It costs only a few cents per day to run.

USER MANUAL DF-HU28015 Cotech

White rectangular water purifier device with digital display showing 55% usage, no visible text or symbols on the device itself.

Important!

Read the entire instruction manual carefully and make sure that you fully understand it before you use the equipment. Keep the manual for future reference.

Viktig information:

Original instructions

Bruksanvisning i original

Originalbruksanvisning

Please read the entire instruction manual before using the product and then save it for future reference. We reserve the right for any errors in text or images and any necessary changes made to technical data. If you have any questions concerning technical problems please contact our Customer Services.

Safety

• Read the entire instruction manual before use.
• Persons (including children) whose physical, sensory or mental capability or lack of experience and knowledge means that they cannot use the humidifier in a safe way must not use it without supervision or instruction.
• Note: Hot vapour.
• Unplug the humidifier from the wall socket before cleaning.
• The mains lead should be checked regularly. Do not use the humidifier if the mains lead or its plug is damaged.
• The mains lead must be changed if damaged. This is to prevent the risk of electric shock or fire and should only be carried out by the manufacturer, authorised service facility or a qualified tradesman.
• The humidifier may be used by children aged 8 years and above and by persons with reduced physical, sensory or mental capability or lack of experience and knowledge provided they have been given supervision or instruction concerning use of the product in a safe way and understand the hazards involved.
• Never let children play with the humidifier.
• Cleaning and maintenance must not be carried out by children unless under adult supervision.
• The humidifier must only be used with a power supply corresponding to the voltage specified on the rating plate of the humidifier.

• The humidifier is only intended for indoor use and must not be used outdoors.

• The humidifier must only be used for private domestic purposes and only in the manner described in this instruction manual.

• Children cannot understand the dangers associated with the use of electrical appliances; do not leave unsupervised children in the vicinity of the humidifier.
• Persons unfamiliar with the humidifier or who are under the influence of alcohol, medicine or other drugs must not use the humidifier without the supervision of someone familiar with the controls and safe use of the appliance.
• Do not use the humidifier if it has been dropped, if it is not working properly or if it or its mains lead is damaged in any way. The mains lead should be checked regularly.
• The humidifier should only be used when it is fully assembled.
• Repairs should only be carried out by qualified tradesmen. Faulty repairs could result in serious hazards for the user.
• Always unplug the humidifier from the wall socket when the humidifier is not in use, before emptying it or filling it with water, before cleaning it, before assembling/disassembling it and before moving it.
• Do not place your hands in the space around the nebuliser (under the cap (10)) when the humidifier is in use. The high-frequency oscillation causes the membrane to warm up.
• Never unplug the appliance by pulling the mains lead, always grip and pull the plug. Never touch the mains lead with wet hands. Doing so could result in an electric shock.
• Place the humidifier on a firm, level and dry surface where there is no risk of it being pulled over.
• Do place the humidifier directly on the floor or close to sensitive objects which could be damaged by the water vapour. The manufacturer takes not responsibility for damage resulting from the incorrect positioning of the humidifier.

• The humidifier should be placed on a raised surface such as a tabletop or counter.

• Do not pour water into the nozzle of the humidifier.

• The appliance must not be immersed in water or other liquid. Doing so could result in an electric shock. The humidifier should not be washed in the dishwasher.
• Do not lay the mains lead under a rug, carpet or where there is a risk of someone tripping over it.
• Never use the humidifier close to flammable substances, gases or vapours.
• Foreign objects must not be inserted into the humidifier.
• The air inlet and vapour outlet must not be blocked.
• Do not place any heavy items on the humidifier, it is not designed to be stood on or sat on.
• For optimum performance and for health reasons, use only fresh, cold tap water, free from contaminants in the humidifier. If you are unsure of the water quality, use distilled water. The humidifier should be cleaned regularly in the manner described in this instruction manual.
• No additives such as fragrances, essential oils or water conditioners must be added to the water, they will cause the appliance to malfunction. The guarantee will be void if any additives added to the water tank damage the humidifier.
• The high-frequency vibrations produced by the humidifier are not harmful and cannot be heard by humans or animals.

Modes

• Ultrasonic dehumidifier
• Touch controls
• Warm or cold mist
  • Humidity level: 40%, 50%, 60%, 70% or CO (continuous operation)
• High and low mist setting (low 200 ml/h ± 20% or high 350 ml/h ± 20%)
• Timer: 1–12 hours.
  • Automatic dry-tank shut-off
• The display will only light at full power while the settings are being adjusted and will transition to 30% brightness after 1 min of setting inactivity.

Product description

1. Top-fill water filler cap
2. Fragrance box filler opening
3. Fragrance box for containing essential oils or similar products
4. Mist nozzle
5. Water tank
6. Water level indicator

7. Base

8. Touch controls

Top view of base (water tank removed)

1. Brush
2. Heating element
3. Nebuliser (ultrasonic transducer)
4. Float switch

Bottom view of water tank

1. Lid with non-return valve. To be opened when cleaning the water tank.

Technical line drawing of a mechanical component with a circular housing and internal structure (no text or symbols)

Display

1. Touch controls

ABCDEF

O

O

O

O

O

A) Power switch ON/OFF
B) High/low mist output
C) Humidity level

Operating instructions

Filling the water tank

1. Twist the filler cap (1) until the indicator arrow points to the "open" symbol.
2. Remove the filler cap and fill the tank with water.
3. Refit the filler cap and twist it until the indicator arrow points to the "locked" symbol.

Note: Never add water directly to the base; only add water to the water tank.

Note: Never fill the water tank with water that is hotter than 40^ C.

Note:

• Always switch the humidifier off before removing the water tank or when refilling. Do not switch the humidifier on if the water tank is not securely in place.
• For optimum performance and for health reasons, use only fresh, cold tap water, free from contaminants. If you are unsure of the water quality, use distilled water. The water temperature must be between 5 and 40 °C.
• Do not switch the humidifier on if the water tank is empty.
• When the water tank is empty, the humidifier will automatically shut off and "NO!" and 📄️ 📁️ 🐃️ will flash alternatively on the display. Unplug the humidifier from the mains and fill the water tank.
• When the water tank has been filled and the humidifier has been switched on “NO!” and 📄 will continue to be displayed for a few minutes until the base has been filled to the correct level. During this time water will pass through the filter and a gurgling sound will be heard, which is completely normal. The filter cleans, sterilises and softens the water.

Placement

• Place the humidifier on a horizontal water-resistant surface. Make sure that the mains lead is positioned in such a way that there is no risk of anyone tripping over it and possibly pulling down the machine.
• Recommended operating temperature: 5–40 °C. Protect the humidifier against frost.
• The humidifier should not be placed near heat sources or in direct sunlight.
• The humidifier is designed for indoor use only.
• The humidifier should be placed in a well-ventilated position: min 90 cm above floor level, min 30 cm from walls and min 120 cm from ceiling level.

On, off and mist level setting

ON/OFF

ON

1. Plug the mains lead into a wall socket. Two beeps will be emitted and all LED symbols will illuminate for 2 seconds.
2. Press the power button 📁 to start the humidifier. Two beeps will be emitted. All LED symbols (13) will flash for 1 second, go off for 0.5 seconds and the "HI" message will then flash on the display for 1 second. The humidifier checks the water level. If enough water is present the humidifier will start after a 1 second pause. The humidifier starts with these modes active:

a) Continuous operation
b) Timer OFF
c) Fan
d) Cold mist
e) HI (max misting)
f) Current ambient humidity level display

Ambient humidity readings take some time before showing on the display.

OFF

Turn off the humidifier by pressing the power button “OFF” will flash on the display for 1 second and a beep will be emitted. The humidifier will then go into energy-saving mode.

a) Fan off
b) Heating element off
c) Display off

HI/LO power

a) The humidifier is set to HI during start.
b) Press ☐ once to switch to the LO setting. "LO" will show on the display.
c) Press ☐ once to switch back to the HI setting. "HI" will show on the display.

• HI = 100% power, approx 350 ml mist output per hour.
• LO = 60% power, approx 200 ml mist output per hour.

Selecting the desired humidity level

a) The humidifier starts off in CO mode (continuous operation).
b) Press repeatedly until the desired ambient humidity level is reached: 40%, 50%, 60%, 70% and CO (continuous operation).
c) Once the desired humidity setting is reached the humidifier will transition into energy-saving mode. The humidifier will automatically restart whenever the humidity level drops below this setting.
d) CO mode stands for continuous operation, which means that the humidifier will run continuously until the water tank runs dry regardless of the ambient humidity level. A full water tank will last for about 11 hours in continuous operation mode.

Timer (1–12 hours)

a) Press repeatedly until the desired number of hours of operation has been reached: 1h, 2h, 3h, 4h, 5h, 6h, 7h, 8h, 9h, 10h, 11h, 12h and 0h (Oh = timer off). The timer begins countdown as soon as it is set. Press the timer button again to add additional hours (1 hour for every press).

Cold or warm mist

a) The humidifier is in cold mist mode during start.
b) Press ☐ once to switch to warm mist output. The heating element will then be activated. Will show on the display.
c) Press ☐ once to switch to warm mist output. The heating element will then deactivate. "HI" will flash on the display for 1 second, and then and broken line symbol will flash for 2 seconds. Thereafter, the screen will return to normal display mode.
d) Press ☐ once to switch to start mode.

Sleep mode

a) Press once to enter energy-saving mode. will show on the display for 5 seconds, then turn off and the power setting will then transition to the LO power setting. All other settings will not be affected. No beep signals are emitted when the water tank becomes empty. In this mode, only the ON/OFF and sleep mode controls are active.

b) Press ☑ once to exit energy-saving mode. A beep will be emitted when the water tank becomes empty. will flash for 1 second and a flashing dash symbol will then show for 2 seconds before returning to normal display mode.

Automatic dry-tank shut-off

a) When the water tank becomes empty, "NO!" and will flash alternately on the display for 1 minute. If the machine senses that no water is present after 1 minute it will return to energy-saving mode.
b) The buzzer sounds 3 times: After 1 second, after 30 seconds and after 60 seconds. In this mode, only the ON/OFF touch control will be active.
c) Unplug the humidifier and fill the water tank. Never fill the water tank with water that is hotter than 40 °C.
d) When the water tank has been filled and the humidifier has been switched on, "NO!" and will continue to be displayed for a few minutes until the base (7) has been filled to the correct level. During this time water will pass through the filter and a gurgling sound will be heard, which is completely normal.

Fragrance box

The humidifier has a fragrance box (3) for containing essential oils or similar products.

a) Open the fragrance box (2) cap.
b) Place a few drops of fragrance into the fragrance box.
c) Close the cap.

Note: Wash the fragrance box before putting the humidifier away for storage.

Warning: No oils or other additives must be added to the water tank itself.

Diagram of a circular structure with internal components and a numbered label (2), no readable text or symbols present.

Care and maintenance

Warning: Unplug the mains lead before cleaning the product.

Exterior cleaning

Clean the exterior of the product using a soft, moist cloth. Use a mild detergent. Never use solvents or strong, abrasive cleaning agents.

Cleaning the water tank

• Any water remaining in the tank must be poured out before the water tank is refilled. Rinse the tank thoroughly if the water has sat in the tank for more than 7 days. Open the lid (12) and clean the inside of the water tank using fresh water and a brush if needed. Screw the lid back on.
• Take this opportunity to also clean the top of the base with clean water and a brush while the water tank is removed. Do not touch the nebuliser or heating element with hard or sharp objects.

Storage

Empty the water tank completely and wipe away any remaining water from the top of the base using soft dry kitchen paper.

Store the humidifier in a dry room-temperature environment.

Responsible disposal

This symbol indicates that this product should not be disposed of with general household waste. This applies throughout the entire EU. In order to prevent any harm to the environment or health hazards caused by incorrect waste disposal, the product must be handed in for recycling so that the material can be disposed of in a responsible manner. When recycling your product, take it to your local collection facility or contact the place of purchase. They will ensure that the product is disposed of in an environmentally sound manner.

Symbol of a trash bin crossed with no visible text or labels

Troubleshooting guide

Problem Cause	Possible solution
No lights, fan or mist.	The humidifier is possibly unplugged.	Make sure that the plug is securely plugged into a wall socket and that the fuse is intact.
The water tank is leaking.	The filler cap is not securely tightened or its seals are bad.	Check and tighten the filler cap securely.
The mist has an unpleasant odour.	New humidifiers may give off an odour in the beginning or the water used may be unclean.	Clean the water tank and change the water.
Mist output is minimal.	The nebuliser may be clogged with lime deposits or the water may be unclean.	Clean the nebuliser and change the water.
No mist. Water	capacity has exceeded the ability for the nebuliser/heating element to handle.	Pour out some water and insert the water tank correctly.

Specifications

Ultrasonic dehumidifier

Input voltage 220–240 V AC, 50 Hz

Power 95 W

Sound level ≤ 45 dB

Operating temperature 5–40 °C

Water tank 4 litres

Full-tank operation 11 hours of continuous operation

Max mist output 350 ml/h

Capacity Designed for rooms up to 50 m²

Net weight 1.8 kg

Size (D × W × H) 22 × 22 × 23 cm

Luftfuktare

Art.nr 36-6480 Modell DF-HU28015

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Display

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Felsökningsschema

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Display

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Feilsøking

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Näyttö

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Huolto ja ylläpito

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Vianhakutaulukko

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Display

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Pflege und Wartung

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Fehlersuche

POSTAL 10 – 13 Market Place

Kingston Upon Thames

Surrey

KT1 1JZ

DEUTSCHLAND

KUNDENSERVICE Hotline: [phone]

E-Mail: [e-mail]

HOMEPAGE www.clasohlson.de

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