1. Support Home
  2. PULSE 500 Series
  3. Operator Startup
  4. Operator Not Booting Up or LCD Stuck on the Voltage Screen

Operator Not Booting Up or LCD Stuck on the Voltage Screen

If your PULSE 500 Series door operator doesn't boot up, or the LCD is stuck on the voltage screen, then follow these steps:
  • This indicates that the control board at the bottom and the drive board at the top are not communicating properly. This communication occurs over the GS cable with voltage being supplied from the control board.
  • Check that there is 24V between GS and COM.
  • If there is not, try disconnecting the GS cable and measuring between the GS and COM terminals:
    • If you get 24V with the GS cable disconnected, there is a short somewhere up the line.
    • If you do not get 24V with the GS cable disconnected, the control board is either not powered, or is possibly shorted or damaged.
  • If the latter is the case, please contact technical support for further assistance.

Leave feedback on this article







Need more assistance?

  Click to Chat Now

Still can’t find the information you need?


By clicking “Allow All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. For more information please refer to our Privacy Notice.

iControls Inc. Logo

Privacy Preference Center

When you visit iControls.ca, we may store or retrieve information on your browser, mostly in the form of cookies. This information might be about you, your preferences or your device and is mostly used to make the site work as you expect it to. The information does not usually directly identify you, but it can give you a more personalized web experience. Because we respect your right to privacy, you can choose not to allow some types of cookies. Click on the different consent preferences below to find out more. As a reminder, blocking some types of cookies may impact your browsing experience on iControls.ca.

For more information, please refer to our Privacy Notice .

Manage Consent Preferences