Trane Zone Controller, N512 Table of diagnostics, Diagnostics, Fan unaffected, Valves unaffected

Diagnostics

Smart reset diagnostics

After the controller detects the first smart reset diagnostic, the unit waits 30 minutes before initiating the smart reset function. If another diagnos- tic of this type occurs again within 24 hours after an automatic clearing, you must clear the diagnostic manually by using any of the ways shown for “Manual (latching) diagnostics.”

Informational diagnostics

Informational diagnostics provide information about the status of the controller. They do not affect machine operation. They can be cleared from the controller using any of the ways shown for “Manual (latching) diag- nostics.”

Table of diagnostics

Table 16 The tables present each diagnostic that can be generated by the

Tracer ZN521, its effect on outputs (consequences), and its type.

Note:

The generic binary output is unaffected by diagnostics.

Table 16. Diagnostics

Diagnostic	Probable cause	Consequences	Diagnostic
			type
Maintenance Required	Fan run hours exceed the	Fan unaffected	Informational
	time set to indicate filter	Valves unaffected
	change	Electric heat unaffected
		Face and bypass damper unaffected
Condensate Overflow	The drain pan is full of	Fan off	Manual
	water	Valves closed
		Outdoor air damper closed
		Face and bypass damper bypass
		DX/electric heat off
		Baseboard heat off
Low Coil Temp Detection	The leaving fluid temper-	Fan off	Smart reset/
	ature may be close to	Valves open	Manual
	freezing	Outdoor air damper closed
		Face and bypass damper bypass
		DX/electric heat off
		Baseboard heat off
Low Airflow—Fan Failure	The fan drive belt, con-	Fan off	Manual
	tactor, or motor has	Valves closed
	failed.	Outdoor air damper closed
		Face and bypass damper bypass
		DX/electric heat off
		Baseboard heat off

CNT-SVX07C-EN 59