Trane UniTrane Installation, Operation And Maintenance Instructions page 109

Table 31. Tracer ZN510 controller diagnostics
Diagnostic
Auxiliary temp. failure
Condensate overflow detection
Entering water temp. failure
Fan mode failure
Invalid unit configuration failure
Low temp. detection
Maintenance required
Setpoint
Zone temp. failure
Notes:
1. Priority Level: Diagnostics are listed in order from highest to lowest priority. The controller senses and records each
2. Latching: A latching diagnostic requires a manual reset of the controller; while a non-latching diagnostic automatically
3. Enabled: End device is allowed to run if there is a call for it to run.
4. Disabled: End device is not allowed to run even if there is a call for it to run.
5. No Action: The diagnostic has no affect on the end device.
Using Trane's Service Tool, Rover™
Rover™, Trane's service tool, can reset diagnostics present in the controller and troubleshoot the
unit. For more information, refer to the Trane publication EMTX-SVX01G-EN (Rover Service Tool:
Installation, Operation, and Programming Guide).
Diagnostic Reset
Any device that can communicate the network variable nviRequest (enumeration "clear_alarm")
can reset diagnostics in the Tracer ZN520 controller.The controller also attempts to reset
diagnostics whenever power is cycled.
Cycling the Fan Switch
Cycle the fan speed switch from Off to any speed and the controller resets all diagnostics.
Diagnostics may recur immediately if the problem still exists.
UNT-SVX07B-EN
diagnostic independently of other diagnostics. It is possible to have multiple diagnostics present simultaneously. The
diagnostics affect unit operation according to priority level.
resets when the input is present and valid.
Latching? Fan
No Enabled
Yes Off
No Enabled
No Enabled
Yes Disabled
Yes Off
Yes Enabled
No Enabled
No Off
Diagnostics
Valves Elec Heat
No action No action
Closed Off
Enabled Enabled
Enabled Enabled
Disabled Disabled
Open Off
No action No action
No action No action
Closed Off
Damper
No action
Closed
Enabled
Enabled
Disabled
Closed
No action
No action
Closed
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