Introduction

This document is designed to assist and guide a trained technician or engineer to diagnose and

troubleshoot the Smart Equipment Controller alarms. When troubleshooting always use Johnson

Controls and industry safety standards.

Preliminary checks

No power

The Smart Equipment™ Control (SEC) board requires 24 VAC to operate. If no power is provided then

no alarms are active, the LCD screen is blank, and the unit does not function at all.

1.on the upper left hand of the board using the voltmeter.–

If no voltage is present, check the wiring diagram and trace where the 24 VAC power is

lost.

If voltage is present and no power is indicated on the SEC board through the LCD

display or power LED indicator, replace the board.

2.Check for optional components such as the phase monitor in the circuit. If there is a red light

visible on the phase monitor, this indicates that the board is not receiving power. Swap the

incoming voltage going to the unit, not the voltage within the unit.