Trane Tracer Unit Ventilator Troubleshooting, Tracer ZN.520 Unit Controller diagnostics, Reset

Troubleshooting

Table 28: Tracer™ ZN.520 Unit Controller diagnostics

Diagnostic	Unit Response	Latching/non-	Reset
		latching
	Fan—ENABLED
	Valves—ENABLED
Humidity Input Failure4	Outdoor air damper—ENABLED	Non-latching	Communicated or manual reset
	Face bypass damper—ENABLED
	DX/electric heat—ENABLED
	Baseboard heat—ENABLED
	Fan—ENABLED
	Valves—ENABLED
CO2 Sensor Failure4	Outdoor air damper—ENABLED	Non-latching	Communicated or manual reset
	Face bypass damper—ENABLED
	DX/electric heat—ENABLED
	Baseboard heat—ENABLED
	Fan—ENABLED
	Valves—ENABLED
Generic AIP Failure4	Outdoor air damper—ENABLED	Non-latching	Communicated or manual reset
	Face bypass damper—ENABLED
	DX/electric heat—ENABLED
	Baseboard heat—ENABLED
	Fan—ENABLED
	Valves—ENABLED
Defrosting - Cmpr Lockout4	Outdoor air damper—ENABLED	Non-latching	Communicated or manual reset
	Face bypass damper—ENABLED
	DX/electric heat—OFF
	Baseboard heat—ENABLED
	Fan—ENABLED
	Valves—ENABLED
Maintenance Required	Outdoor air damper—ENABLED	Non-latching	Communicated or manual reset
	Face bypass damper—ENABLED
	DX/electric heat—ENABLED
	Baseboard heat—ENABLED
	Fan—ENABLED
	Valves—ENABLED
Local Fan Mode Failure4	Outdoor air damper—ENABLED	Non-latching	Communicated or manual reset
	Face bypass damper—ENABLED
	DX/Electric Heat—ENABLED
	Baseboard heat—ENABLED
	Fan—ENABLED
	Valves—ENABLED
Local Setpoint Failure4	Outdoor air damper—ENABLED	Non-latching	Communicated or manual reset
	Face bypass damper—ENABLED
	DX/electric heat—ENABLED
	Baseboard heat—ENABLED
	Fan—ENABLED
	Valves—ENABLED
Generic Temperature	Outdoor air damper—ENABLED	Non-latching	Communicated or manual reset
Failure	Face bypass damper—ENABLED
	DX/electric heat—ENABLED
	Baseboard heat—ENABLED

UV-SVP01A-EN 53