Smart Equipment Controls Quick Start Guide for UCB HVAC Systems

General Information

Before configuring your unit controller, ensure you understand the application and identify the equipment configuration. This includes:

Constant Volume
Variable Air Volume (VAV)
Economizer
Hot Gas Reheat
Dual Stage
Four Stage
Heat Pump
Thermostat Controls
Network Sensor Control
Space Sensor Control
Discharge Air Control

Understanding the LCD

After applying power to your rooftop unit (RTU), a start-up sequence begins on the Unit Control Board (UCB) LCD. When the controller is ready, the screen is blank if no faults are present. Navigate menus using the joystick and two push buttons (ENTER, CANCEL) below the LCD.

UCB Navigation

The UCB features a joystick for navigation and two push buttons: ENTER and CANCEL. The joystick moves the cursor up or down to scroll through selections. Press ENTER to display sub-menu items or property values. Move the joystick up or down to display other property values.

The UCB top-level menu includes options such as:

Status
Alarms
Summary
Commission
Controller
Update
Details
Self Test
View Results

Start-up Sequence

When power is applied, the UCB begins the following start-up sequence. During this time, the joystick, ENTER button, and CANCEL button are non-functional.

The LCD scrolls the text Johnson Controls on the top line and JCI on the bottom line.
The display backlight and green power LED light and remain lit as long as power is applied to the C and 24V terminals.
The red fault LED lights, goes off briefly, and then flashes throughout the start-up sequence.
The green SA bus LED lights briefly.

The LCD shows a countdown on the top line (e.g.,

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