1. Product Overview
The Deerma DEM-BY200 is a carpet washing vacuum cleaner designed for effective cleaning of carpets and upholstery. This appliance combines vacuuming and washing functions to remove dirt and stains, leaving surfaces clean and refreshed. Please read this manual thoroughly before operating the device to ensure safe and optimal performance.

Image 1.1: The Deerma DEM-BY200 Carpet Washing Vacuum Cleaner with its included cleaning nozzles.
2. Safety Instructions
To reduce the risk of fire, electric shock, or injury, always follow basic safety precautions when using an electrical appliance. This includes:
- Read all instructions before using the appliance.
- Do not use outdoors or on wet surfaces.
- Do not allow to be used as a toy. Close attention is necessary when used by or near children.
- Use only as described in this manual. Use only manufacturer’s recommended attachments.
- Do not use with a damaged cord or plug. If the appliance is not working as it should, has been dropped, damaged, left outdoors, or dropped into water, return it to a service center.
- Do not pull or carry by cord, use cord as a handle, close a door on cord, or pull cord around sharp edges or corners. Do not run appliance over cord. Keep cord away from heated surfaces.
- Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.
- Do not handle plug or appliance with wet hands.
- Do not put any object into openings. Do not use with any opening blocked; keep free of dust, lint, hair, and anything that may reduce airflow.
- Keep hair, loose clothing, fingers, and all parts of body away from openings and moving parts.
- Turn off all controls before unplugging.
- Use extra care when cleaning on stairs.
- Do not use to pick up flammable or combustible liquids, such as gasoline, or use in areas where they may be present.
- Do not pick up anything that is burning or smoking, such as cigarettes, matches, or hot ashes.
- Do not use without filters in place.
- Always disconnect from electrical outlet before connecting or disconnecting hose.
- Store the appliance indoors in a cool, dry place.
3. Components and Parts
Familiarize yourself with the main components of your Deerma DEM-BY200 cleaner:
- Main Unit (with clean water tank and dirty water tank)
- Flexible Hose
- Handheld Cleaning Nozzle with Brush
- Power Cord
- HEPA Filter (pre-installed)

Image 3.1: The handheld cleaning nozzle, used for targeted cleaning.
4. Setup
Follow these steps for initial setup before first use:
- Unpack the Appliance: Carefully remove all components from the packaging. Retain packaging for future storage or transport.
- Assemble the Hose: Connect the flexible hose securely to the main unit's hose port. Ensure it clicks into place.
- Attach Cleaning Nozzle: Connect the desired cleaning nozzle (e.g., handheld nozzle with brush) to the end of the flexible hose.
- Fill the Clean Water Tank: Locate the clean water tank (usually transparent or blue). Remove it from the main unit. Fill it with clean water and, if desired, a suitable carpet cleaning solution (follow solution manufacturer's instructions for dilution). Do not exceed the MAX fill line. Reinsert the tank securely.
- Check Dirty Water Tank: Ensure the dirty water tank is empty and properly seated in the main unit.
- Connect Power: Unwind the power cord and plug it into a suitable 220V electrical outlet.
5. Operating Instructions
To operate your Deerma DEM-BY200 carpet washing vacuum cleaner:
- Pre-test: Before cleaning, test a small, inconspicuous area of the carpet or upholstery for colorfastness.
- Power On: Press the power button on the main unit to turn on the appliance.
- Spray Solution: Hold the cleaning nozzle over the area to be cleaned. Press the spray trigger on the nozzle handle to dispense cleaning solution onto the carpet.
- Scrub and Extract: Gently scrub the area with the brush on the nozzle. Then, release the spray trigger and slowly pull the nozzle over the wet area to vacuum up the dirty solution. Overlap strokes slightly.
- Repeat if Necessary: For heavily soiled areas, you may need to repeat the spray and extract process.
- Rinse (Optional): For best results, after cleaning with solution, empty the clean water tank, refill it with only clean water, and repeat the extraction process to rinse the carpet.
- Monitor Tanks: Keep an eye on the clean water tank (refill when empty) and the dirty water tank (empty when full). The appliance may stop spraying or lose suction if tanks are not managed.
- Power Off: Once cleaning is complete, turn off the appliance by pressing the power button.
6. Maintenance
Regular maintenance ensures the longevity and performance of your cleaner:
- Empty and Clean Dirty Water Tank: After each use, remove the dirty water tank, empty its contents, and rinse it thoroughly with clean water. Allow it to air dry before reassembling.
- Clean Nozzles and Hose: Rinse the cleaning nozzles and the flexible hose with clean water to remove any residue.
- Clean Filter: The appliance uses a HEPA filter. Periodically remove and clean the HEPA filter according to the instructions provided with the filter. Tap off loose dirt or rinse with water if specified (ensure it is completely dry before reinserting).
- Wipe Down Unit: Wipe the exterior of the main unit with a damp cloth. Do not use harsh chemicals.
- Store Properly: Store the appliance and its attachments in a clean, dry place away from direct sunlight and extreme temperatures.
7. Troubleshooting
If you encounter issues with your Deerma DEM-BY200, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord not plugged in; no power at outlet | Ensure cord is securely plugged in; check circuit breaker or try another outlet. |
| No spray/low spray | Clean water tank empty; nozzle clogged; pump issue | Refill clean water tank; clean nozzle; contact support if pump is faulty. |
| Low suction | Dirty water tank full; hose/nozzle clogged; filter dirty; tank not sealed properly | Empty dirty water tank; clear any blockages; clean HEPA filter; ensure tanks are securely seated. |
| Water leaking | Tanks not properly seated; damaged seal; overfilled tank | Ensure tanks are correctly installed; check for visible damage to seals; do not overfill tanks. |
8. Specifications
Key technical specifications for the Deerma DEM-BY200:
| Feature | Specification |
|---|---|
| Brand | Deerma |
| Model Number | DEM-BY200 |
| Special Feature | Carpet Cleaning |
| Filter Type | HEPA Filter |
| Surface Recommendation | Carpet |
| Power Source | Corded Electric |
| Voltage | 220 Volts |
| Cordless? | No |
| Form Factor | Canister |
| Noise Level | 80 Decibels |
9. Warranty and Support
For warranty information and customer support, please refer to the documentation provided with your purchase or contact the retailer. Information regarding spare parts availability and software updates is not available at this time.





