1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of the MICRODOS MP3 Dishwasher Detergent Doser. Please read this manual thoroughly before using the device.

Figure 1: Front view of the MICRODOS MP3 Dishwasher Detergent Doser. This image shows the compact blue housing with a clear cover over the peristaltic pump mechanism, and two tube connections at the bottom.
2. Safety Instructions
Always adhere to the following safety guidelines to prevent injury or damage to the device:
- Ensure the power supply matches the device's specifications (24V).
- Do not operate the doser with damaged tubing or connections.
- Only use the doser for its intended purpose: dispensing dishwasher detergent.
- Keep out of reach of children and unauthorized personnel.
- Disconnect power before performing any maintenance or cleaning.
3. Technical Specifications
| Feature | Specification |
|---|---|
| Model | MP3 |
| Application | Dishwasher Detergent Dosing |
| Mounting Type | Horizontal / Vertical |
| Flow Rate | 1.5 l/h |
| Suction Height | 1.5 m |
| Tube Connection | Ø 4 x 6 mm |
| Voltage | 24 V (AC) |
| Control | Without integrated control |
| Manufacturer | MICRODOS |
4. Setup and Installation
Follow these steps for proper installation:
- Mounting: The MP3 doser can be mounted either horizontally or vertically. Choose a stable surface near the dishwasher and the detergent container. Ensure there is sufficient space for tube connections and maintenance. Use appropriate fasteners (not included) to secure the unit through the mounting holes.
- Tube Connection: Connect the suction tube (inlet) from the detergent container to the appropriate port on the doser. Connect the discharge tube (outlet) from the doser to the dishwasher's detergent inlet. Ensure all connections are secure and leak-free. The recommended tube size is Ø 4 x 6 mm.
- Electrical Connection: Connect the doser to a 24V AC power supply. Ensure the power supply is stable and matches the doser's requirements. It is recommended to have a qualified electrician perform the electrical connection.
- Priming (Initial Setup): Before first use, it may be necessary to prime the pump to ensure detergent flows correctly. This typically involves running the pump for a short period until detergent is visible in the discharge tube. Refer to your dishwasher's manual for specific detergent dosing system priming procedures if applicable.
5. Operating Instructions
The MICRODOS MP3 doser operates without integrated control, meaning its operation is typically managed by an external system, such as the dishwasher's control unit.
- Automatic Operation: Once installed and connected to the dishwasher's control system, the doser will automatically dispense detergent as required by the dishwasher's cycle.
- Detergent Level: Regularly check the detergent level in the container to ensure continuous operation. Refill as needed.
- Flow Rate: The doser has a fixed flow rate of 1.5 l/h. Adjustments to detergent concentration or dosing frequency must be managed via the external control system or by diluting the detergent if necessary.
6. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your doser.
- Daily Check: Visually inspect the tubes for any kinks, blockages, or leaks. Ensure the detergent container has sufficient liquid.
- Weekly Check: Clean the exterior of the doser with a damp cloth. Do not use abrasive cleaners.
- Tube Replacement: The peristaltic tube inside the doser is a wear part. Replace it periodically (e.g., every 6-12 months, depending on usage) or if you notice reduced flow or inconsistent dosing. Refer to the manufacturer's guidelines for specific replacement parts.
- Power Disconnection: Always disconnect the power supply before performing any maintenance or replacing parts.
7. Troubleshooting
If you encounter issues with your MICRODOS MP3 doser, refer to the table below:
| Problem | Possible Cause | Solution |
|---|---|---|
| Doser not pumping | No power; Kinked or blocked tubes; Empty detergent container; Worn peristaltic tube. | Check power connection; Inspect and clear tubes; Refill detergent; Replace peristaltic tube. |
| Inconsistent dosing | Air in the system; Worn peristaltic tube; Incorrect external control signal. | Prime the pump; Replace peristaltic tube; Verify external control unit settings. |
| Leakage from connections | Loose connections; Damaged tubes. | Tighten connections; Replace damaged tubes. |
If the problem persists after attempting these solutions, contact customer support.
8. Warranty Information
This product is covered by a manufacturer's warranty against defects in materials and workmanship. The warranty period typically begins from the date of purchase. Please retain your proof of purchase for warranty claims.
Note: The warranty does not cover damage caused by improper installation, misuse, neglect, unauthorized repairs, or normal wear and tear of consumable parts like the peristaltic tube.
9. Customer Support
For technical assistance, spare parts, or warranty inquiries, please contact MICRODOS customer support or your local distributor.
Manufacturer: MICRODOS
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