Trane BCXC-SVX01B-EN, BCVC, BCHC Translating Multiple Diagnostics, Tracer ZN520 test sequence

Diagnostics

Table 39. Tracer ZN010 and ZN510 test sequence for 1-heat/1-cool configurations

		Fan	Cool output(a)	Heat output	Damper
Steps		J1-1, J1-3	J1-	J1-	J1-
1.	Off	Off	Off	Off	Closed
2.	Fan high	High	Off	Off	Closed
3.	Exhaust fan	(b)	Off	Off	Closed
4.	Fan	Low	Off	Off	Closed
5.	Cool	High	On	Off	Closed
6.	Heat	High	Off	On	Closed
7.	Two-position damper(c)	High	Off	Off	Open
8.	Exit	(d)

Note: The 2-position damper energizes during this step if the controller is configured for a 2-position damper.

(a)At the beginning of step 2, the controller attempts to clear all diagnostics.

(b)Tracer™ ZN010 and ZN510 have a binary output default as “none” on J1-X from the factory. If the unit has a 2-speed fan, step 3 will energize the low fan speed. If the unit has a single speed fan, step 3 will continue to energize the high fan speed. This binary output can be reconfigured as an exhaust fan, with the use of Rover™ software.

(c)After the fresh air damper step, the test sequence performs the exit step.This initiates a reset and attempts to return the controller to normal operation.

(d)For all 1-heat/1-cool applications including 2-pipe changeover, the cooling and heat test stage energize. This occurs even though during normal 2-pipe changeover operation binary output controls the unit valve for both cooling and heating.

Table 40. Tracer ZN520 test sequence

				Main	Electric heat or Fresh air
			Fan	valve	aux. valve		damper	Generic/baseboard heat
Step		J1-1	J1-2	J1-3	J1-5	J1-6	J1-9	J1-10	J1-11	J1-12	TB4-1
1.	Off(a)	Off	Off	Off	Off	On	Off	aux: on	Off	On	Off
						EH: off
2.	Fan high(b)	High	Off	Off	Off	Off	Off	Off	Off	Off	Off
3.(c)		Off		Off	Off	Off	Off	Off	Off	Off	Off
4.	Fan low	Off	Off	Low	Off	Off	Off	Off	Off	Off	Off
5.	Main open	High	Off	Off	On	Off	Off	Off	Off	Off	Off
6.	Main close, EH1 on	High	Off	Off	Off	On	On	Off	Off	Off	Off
7.	Aux. open	High	Exh(d)	Off	Off	Off	On	Off	Off	Off	Off
		EH1 on
8.	Aux. close, damper open	High	Off	Off	Off	Off	Off	On	On	Off	Off
							EH1 off	EH2 on
9.	Damper close	High	Off	Off	Off	Off	Off	Off	Off	On	Off
10. Generic/baseboard heat energized		High	Off	Off	Off	Off	Off	Off	Off	Off	On
11. Exit(e)		Exit

(a)Upon entering manual output test mode, the controller turns off all fan and electric heat outputs and drives.

(b)At the beginning of step 2, the controller attempts to clear all diagnostics.

(c)The low fan speed output energizes at step 3. If the unit is configured for a 1 speed fan, the fan remains on high speed at step 3.

(d)If the unit is configured for a 1- or 2-speed fan, and BOP2 is configured for an exhaust fan, the exhaust fan output energizes on step 7. The exhaust fan output is shared with medium speed.

(e)After step 10, the test sequence performs an exit. This initiates a reset and attempts to return the controller to normal operation.

Diagnostics

Translating Multiple Diagnostics

The controller senses and records each diagnostic independently of other diagnostics. It is possible to have multiple diagnostics present simultaneously. The diagnostics are reported in the order they occur.

Possible diagnostics include:

74 BCXC-SVX01B-EN