Intelli-Hood 3 Faults


Author: Krista Rose –

Is an Intelli-Hood 3 (IH3) system installed in your commercial kitchen? In this post, we will cover common IH3 system faults.

Clearing IH3 Optic Faults

Optics need to be cleaned periodically. Melink recommends cleaning your Intelli-Hood 3 optic sensors a few times each month. If there is a large amount of buildup on the lens or a simple obstruction in the hood, the touchpad will show an optic fault. 

  • The touchpad will show which hood has the optic fault.
  • Verify there are no obstructions in the hoods.
  • Verify that the optics are aligned. You can do this by navigating to “Status” under the Menu, then “Hood Controllers.” Select the appropriate hood controller using the “Next” button, and you’ll be able to check the voltage displayed as actual signal versus calibrated signal (ex. 1.32v/1.67v).
  • If the touchpad displays “Calibrating” or a low signal (0.02v/1.84v), the hardware is working properly but may have an obstruction causing the signal to be too low.
  • Many optic faults can be prevented through routine hood cleaning and system maintenance.
  • Verify that the cables are also connected tight on the hood controller. If your fault says “Emitter Missing” or “Receiver Missing,” it is indicating a possible bad connection or failed component. Check the connector at each optic sensor for a loose plug or, less commonly, corrosion on the terminals.

Clearing IH3 Temperature Faults

Temperature sensors installed in the hood monitor the temperature of the exhaust air.  The Intelli-Hood 3 system can be programmed to turn on and off automatically by hood temperature. 

Signs of a temperature fault include fans running at 100% and the touchpad stating that a “Temp Fault” is occurring. Therefore, it is important to understand that a temperature fault could turn your system on or off at inappropriate times. In most cases, the fault will simply cause the fan to run 100%, which will allow cooking to continue but prevents you from saving energy.

If you experience an Intelli-Hood 3 temp fault…

  • Make sure that the sensors are clean. It is not always necessary to clean the temperature sensor unless there is a large amounts of grease or build up.
  • Check the connections that go from the temperature probe to the controllers. Also, verify that the number of temp sensors match the number of temp sensors programmed. Under the Menu, select “Status (1)” followed by “Hood Controllers (3).” Then select “Enter.” If a temperature sensor is not connected properly or isn’t working, then it will show as “Missing.”
  • Check for any damaged components.
  • On the hood controller, there are different ports that can be used to connect the cables for temperature sensors. Swapping those may help to get rid of the fault.

If your Intelli-Hood 3 system is still experiencing issues, we encourage you to check our other reference documents.

Access Intelli-Hood reference materialsFAQs, and how-to videos. For advanced troubleshooting, contact Melink Technical Support (available 24 hours a day, 7 days a week) via web request or by calling 877-477-4190.

Authored By: Krista Rose

As Melink's Marketing Communications Specialist, Krista Rose works to build brand awareness and share Melink's mission.

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