Trane Tracer ZN.520 Manual page 97

Troubleshooting
power-up and those that occur after power-up are handled according to the
defined diagnostics sequences (see Table on page 92).
Building automation system: Some building automation systems can reset
diagnostics in the Tracer ZN.520 zone controller. For more complete
information, refer to the product literature for the building automation system.
Rover service tool: The Rover service tool can reset diagnostics in the Tracer
ZN.520 zone controller. For more complete information, refer to the Rover
Installation, Operation, and Programming guide (EMTX-SVX01A-EN).
Diagnostic reset: Any device that can communicate the network variable
nviRequest (enumeration "clear_alarm") can reset diagnostics in the Tracer
ZN.520 zone controller. The controller also attempts to reset diagnostics
whenever power is cycled.
Cycling the fan switch: If the user cycles the fan speed switch from off to any
speed, the controller resets all diagnostics. Diagnostics may recur immediately
if the problem still exists.
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