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

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Diagnostics

Diagnostics – Alarm Indicator Status

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.

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.

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

application starts over.

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.

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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