Trane Tracer UC400 User Manual

BAS-SVX48H-EN
53
Output Testing
IImmppoorrttaanntt:: The code does not allow directly overwriting the outputs.
Output testing can be accomplished by overriding the following analog and multi-state value
points in the desired state or position:
• CCooooll VVaallvvee RReeqquueesstt:: analog value point for 2-position and modulating hydronic cooling and
changeover valve applications.
• DDXX CCooooll RReeqquueesstt:: analog value point for 1 and 2-stage DX Cooling and Heat Pump
applications.
• HHeeaatt VVaallvvee RReeqquueesstt:: analog value point for 2-position and modulating hydronic heating
valve applications.
• EElleeccttrriicc HHeeaatt RReeqquueesstt:: analog value point for Modulating, 1- and 2-stage electric heating
configurations.
• EEccoonnoommiizzeerr RReeqquueesstt:: analog value point for 2-position and Modulating outdoor air damper
applications.
• SSuuppppllyy FFaann SSppeeeedd RReeqquueesstt:: analog value point for variable speed (0-100%) fan applications,
including Trane ECM engine module application.
• SSuuppppllyy FFaann SSppeeeedd BBAASS:: multi-state value point for fixed 1-, 2-, and 3-speed fan applications.
The points can be overridden on the Tracer TU analog or multi-state pages by clicking on the
Override icon in the control column. A higher priority (lower number) must be chosen over the
current control setting.
Diagnostics
Diagnostics are informational messages that indicate the operational status of the UC400
Controller. In response to most diagnostics, the controller attempts to protect the equipment by
enabling/disabling, or by opening/closing specific outputs. Other diagnostics provide information
about the status of the controller, but have no effect on outputs. Diagnostics are reported in the
order in which they occur. Multiple diagnostics can be present simultaneously. Diagnostic
messages are viewed using the Tracer TU service tool or through a BAS.
NNoottee:: Tracer TU reports only active diagnostics.
Diagnostic Types
The following diagnostics are categorized according to the clearing method each uses and the
type of information each provides.
• Manual- Latching
• Automatic- Non-Latching
• Smart Reset
• Informational
NNoottee:: Clearing diagnostics refers to deleting diagnostics from the software; it does not affect the
problem that generated the message.
Manual- Latching
Manual diagnostics (also referred to as latching) cause the unit to shut down. Manual diagnostics
can be cleared from the UC400 Controller in one of the following methods:
• By using the Tracer TU service tool to reset latching diagnostics on the Alarms Status tab or
by temporarily overriding the Reset Diagnostic Request (bv/2) on the Binary Status tab.
• Through a building automation system.
• By cycling power to the UC400 Controller– when the 24 Vac power to the controller is cycled
OFF and then ON again, a power-up sequence occurs.

Trane Tracer UC400 Specifications

General

Brand	Trane
Model	Tracer UC400
Category	Controller
Language	English