Meiko M-iClean - Error 206: Wash Time Extended. Final Rinse Temperature Too Low

⚠️ Caution / Monitor Closely
Warning: The information provided here is for educational purposes only. Working with commercial kitchen equipment involves high voltage, gas, and high temperatures. We strongly recommend contacting a certified service technician for any repairs. We are not responsible for any damage or injuries resulting from DIY repair attempts. This information is provided 'as is' without any guarantees of completeness or accuracy.

TLDR

On your UM, UM+, US unit, error code 206 indicates an extended wash cycle and that the final rinse temperature is below the required level. This often points to issues with the heating system, insufficient water pressure, or faulty temperature sensors. Immediate diagnosis of the heating elements and water supply is crucial to restore proper sanitization.

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Technical Details

Repair Steps:

  1. Check Water Supply and Pressure: Ensure the water inlet valve is fully open and that adequate water pressure (typically 2-4 bar) is reaching the machine. Low pressure can extend fill times and impact booster heater performance. Inspect the machine’s external water filter for any blockages that might restrict flow.
  2. Verify Heating Elements: Isolate power to the machine. Use a multimeter to test the continuity and resistance of both the wash tank heating element and the rinse booster heater element. Look for any visible signs of scorching or damage on the elements. Replace any faulty elements.
  3. Inspect Temperature Sensors/Thermostats: Locate and inspect the wash tank temperature sensor and the rinse booster temperature sensor (NTC probes). Test their resistance values against the manufacturer’s specifications (resistance changes with temperature). Check wiring connections for looseness or corrosion. Faulty sensors will provide incorrect temperature readings, leading to extended heating times or premature rinse cycles.
  4. Examine Level Sensors and Fill Cycle: Ensure the wash tank level sensor is clean and functioning correctly. An incorrect level reading can prevent heating or proper water circulation. Monitor the machine’s fill cycle. If it’s taking excessively long, review water supply pressure again.
  5. Check Rinse Aid/Detergent Dosing (Indirect Cause): While not directly temperature-related, incorrect chemical dosing can sometimes trick the machine’s sensors or lead to perceived poor cleaning, which might influence wash time algorithms in some advanced models. Verify dosing pumps are operational and chemical levels are adequate.
  6. Descaling the Machine: Limescale buildup on heating elements and sensors acts as an insulator, significantly reducing heating efficiency and causing extended heating times. Perform a thorough descaling procedure as per MEIKO’s maintenance guidelines, focusing on the wash tank and booster heater.
  7. Review Booster Pump/Rinse Pump Operation: Ensure the rinse pump (if present) is functioning correctly and delivering water at the correct pressure and volume to the final rinse nozzles. A weak pump can lead to inadequate rinse coverage and temperature drop.
  8. Power Cycle and Reset: After checking the above, power cycle the machine (turn off main power for 5 minutes, then restart). This can clear transient errors. If the error persists, further investigation or professional service is required.

Common Questions:

Q: Why is my MEIKO UM unit taking longer to wash and rinse?

A: Error code 206, indicating an extended wash cycle and low final rinse temperature, is typically caused by issues with the heating elements, insufficient water pressure, or malfunctioning temperature sensors that prevent the machine from reaching the target temperatures efficiently.

Q: Can I continue using my dishwasher with error code 206?

A: While the machine may still operate, using it with a low final rinse temperature means it is not properly sanitizing dishes. This poses a health risk, as bacteria may not be killed effectively. It is strongly recommended to resolve the error before resuming commercial operation.

Q: How can I prevent low rinse temperature errors in the future?

A: Regular preventative maintenance is key. This includes periodic descaling of the machine’s heating elements and interior, ensuring proper water pressure, and routinely checking the functionality of heating elements and temperature sensors. Also, monitor chemical levels and dosing.

When to call a technician

Consider calling a certified technician if:

  • The error keeps coming back after you've tried the steps above.
  • You're not comfortable doing the checks or repairs yourself.
  • You notice unusual noise, smell, or behaviour.
  • Equipment is under warranty and you want official service.
  • You need the unit back in service quickly with minimal downtime.

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