Diagnostics - Alarm Indicator Status; Reset Diagnostic; Power-Up Reset Or Exception/Override Mode Transition; Reset Diagnostic Point - Trane Symbio 700 Application Manual

Diagnostics – Alarm Indicator Status
The Symbio 700 will support an Alarm Indicator Status point that if configured, drives the state of
a relay output on the Customer Connection Module. This point is set to active when a failure
occurs that functionally stops a critical component within the HVAC system.
For a list of all supported Symbio 700 Diagnostics and if it sets the Alarm Indicator, refer to the
Appendix section of this document.

Reset Diagnostic

A Reset Diagnostic function is responsible for ensuring that the Reset Diagnostic point is set to
the right value under normal application control. The below sections describes how the Reset
Diagnostic point is set to Active and Inactive.

Power-Up Reset or Exception/Override Mode Transition

At power-up or after the unit leaves an Exception or Override mode, all diagnostics are cleared,
and the application starts over.

Reset Diagnostic Point

Diagnostic Resets throughout the controller application are triggered by the state of the Reset
Diagnostic Point. The Reset Diagnostic point is setup as a last-write-wins point type, so it can be
controlled by the local UI on the Symbio 700 or can be communicated.

Heat Cool Mode Transition Reset

When the unit is controlled by a zone sensor, a transition from System Mode Switch Local = OFF
to System Mode Switch Local ≠ OFF triggers a Reset Diagnostic request.
Reset Diagnostic Point – Active to Inactive Transition
When the diagnostic reset function detects the state of the Reset Diagnostic point is Active, after
5 seconds, the Diagnostic Reset function sets the Reset Diagnostic point to Inactive.
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