1. Introduction
Thank you for choosing the Master Professional Dehumidifier DH 720. This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your dehumidifier. Please read these instructions carefully before using the appliance and retain them for future reference.
The Master DH 720 is designed to effectively remove excess moisture from indoor environments, helping to prevent the formation of mold, mildew, and the proliferation of bacteria. Its integrated active carbon filter also helps to reduce unpleasant odors, contributing to a healthier and more comfortable living or working space.
2. Safety Instructions
To ensure safe operation and prevent damage to the unit or injury to yourself, always adhere to the following safety precautions:
- Read all instructions thoroughly before initial use.
- Ensure the power supply voltage matches the rating label on the unit.
- Do not operate the dehumidifier with a damaged power cord or plug.
- Always unplug the unit before cleaning, performing maintenance, or when not in use.
- Place the unit on a stable, level surface to prevent tipping and water spillage.
- Maintain adequate clearance around the unit (at least 20 cm) for proper airflow.
- Do not insert objects into the air inlet or outlet grilles.
- Keep the appliance away from heat sources, direct sunlight, and flammable materials.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
- Do not use the dehumidifier in areas where water is likely to splash onto it, such as bathrooms or laundry rooms, unless specifically designed for such environments.
- Do not attempt to repair or modify the unit yourself. Contact qualified service personnel for all repairs.
3. Product Overview
Key Features
- Dehumidification capacity up to 20 liters per day.
- Integrated hygrostat for automatic humidity control.
- Active carbon filter for odor absorption.
- Quiet operation (48 dBA).
- Compact design with easy transport features.
- Electronic control panel for user-friendly operation.
- Transparent water tank for easy level monitoring.
- UV lamp for protection against bacteria and pathogens.
Components
The Master DH 720 dehumidifier consists of the main unit, a removable water collection tank, an air filter, and a power cord. The control panel is located on the top of the unit, and air intake/outlet grilles are positioned on the front and sides.
Figure 1: Master Professional Dehumidifier DH 720. A white Master Professional Dehumidifier DH 720 unit, shown from a slight angle. The front features a large grille for air intake, and a control panel with a digital display and buttons is visible on the top. The transparent water collection tank is located at the bottom right, and a black power cord with a European plug is coiled next to it.
4. Setup
Follow these steps to set up your dehumidifier for first use:
- Unpack the Unit: Carefully remove the dehumidifier from its packaging. Retain all packaging materials for future storage or transport.
- Choose a Location: Place the dehumidifier on a firm, level surface in the area where dehumidification is desired. Ensure there is at least 20 cm (8 inches) of space around the unit for unrestricted airflow. Avoid placing it near heat sources or in direct sunlight.
- Power Connection: Ensure the power switch is in the 'OFF' position. Plug the power cord into a properly grounded electrical outlet that matches the voltage requirements of the unit.
- Water Tank: Ensure the water collection tank is correctly inserted into the unit. The unit will not operate if the tank is not properly seated or is full.
5. Operating Instructions
Control Panel
The control panel on top of the unit features a digital display and several buttons for controlling the dehumidifier's functions:
- Power Button: Turns the unit ON or OFF.
- Humidity (HUM) Button: Adjusts the desired humidity level.
- Speed Button: Selects the fan speed (e.g., Low, High).
- Timer (TIME) Button: Sets the operating time or delayed start/stop.
- Display: Shows current humidity, set humidity, or timer settings.
Basic Operation
- Turn On: Press the Power button to switch on the unit. The display will show the current room humidity.
- Set Desired Humidity: Press the HUM button repeatedly to cycle through desired humidity levels (e.g., 30%, 40%, 50%, 60%, 70%, Continuous). The unit will operate until the set humidity is reached, then cycle on and off to maintain it.
- Adjust Fan Speed: Press the Speed button to select your preferred fan speed. Higher speeds result in faster dehumidification but may produce more noise.
- Set Timer: Press the TIME button to set an auto-off timer (e.g., 1-24 hours) or an auto-on timer if the unit is off.
- Turn Off: Press the Power button again to switch off the unit.
Water Tank Management
When the water tank is full, the unit will automatically stop operating, and an indicator light will illuminate. Carefully remove the tank, empty the collected water, and reinsert it securely. For continuous drainage, connect a suitable hose (not included) to the continuous drainage outlet (refer to the diagram in the full product manual for location) and direct it to a floor drain.
6. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your dehumidifier.
Cleaning the Air Filter
The air filter should be cleaned every two weeks or more frequently depending on usage and air quality.
- Power Off and Unplug: Always turn off the unit and unplug it from the power outlet before cleaning.
- Remove Filter: Locate the air filter (typically behind the front grille) and carefully remove it.
- Clean Filter: Use a vacuum cleaner to remove dust and debris from the filter. For a more thorough cleaning, wash the filter gently with lukewarm water and a mild detergent. Rinse thoroughly.
- Dry and Reinstall: Allow the filter to air dry completely before reinstalling it into the unit. Do not use the dehumidifier without the filter.
Cleaning the Unit
- Wipe the exterior of the unit with a soft, damp cloth. Do not use harsh chemicals, abrasive cleaners, or solvents.
- Clean the water tank regularly to prevent mold and bacterial growth. Rinse it with clean water and dry thoroughly before reinserting.
Storage
If storing the unit for an extended period:
- Empty and clean the water tank.
- Clean the air filter.
- Unplug the power cord and coil it neatly.
- Store the unit in a cool, dry place, preferably in its original packaging.
7. Troubleshooting
Before contacting customer support, please refer to the following table for common issues and their solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on | No power supply Power button not pressed Water tank full or incorrectly inserted | Check power cord and outlet Press the Power button Empty and correctly reinsert the water tank |
| No dehumidification | Air filter clogged Room temperature too low Humidity setting too high | Clean the air filter Ensure room temperature is within operating range (5-35 °C) Lower the desired humidity setting |
| Unit is noisy | Unit not on a level surface Air filter clogged Obstruction in fan | Place on a flat, stable surface Clean the air filter Check for and remove any obstructions (after unplugging) |
| Water leaks | Water tank not properly seated Continuous drainage hose loose or blocked | Ensure water tank is correctly inserted Check hose connection and clear any blockages |
8. Technical Specifications
| Specification | Value |
|---|---|
| Brand | Master |
| Model Number | DH-720 |
| Dehumidification Capacity | 20 L/day |
| Operating Temperature Range | 5 - 35 °C |
| Operating Humidity Range | 35 - 90 % |
| Airflow | 215 m³/h |
| Water Tank Capacity | 5.5 L |
| Power Consumption | 390 Watts |
| Noise Level | 48 dBA |
| Dimensions (L x W x H) | 41 x 21 x 55 cm |
| Weight | 11 Kilograms |
| Special Features | Integrated hygrostat, active carbon filter, quiet operation, UV lamp |
9. Warranty and Customer Support
This product is covered by a manufacturer's warranty. Please refer to the warranty card included with your purchase for specific terms and conditions. Keep your proof of purchase for warranty claims.
For technical assistance, service, or to inquire about replacement parts, please contact your retailer or the Master customer support department. Contact information can typically be found on the manufacturer's website or in your purchase documentation.
