Red (service) LED

Service pin button

Chapter 6

Status indicators for operation and communication

This chapter describes the operation and communication status indica- tors on the Tracer ZN521 controller, including:

A description of the location and function of the Test button and Ser- vice pin button and the light-emitting diodes (LEDs) located on the controller

A complete list of the diagnostics that can occur, their effect on con- troller outputs, and an explanation of how diagnostics are cleared and the device restored to normal operation

Test button

The Test button is used to perform the manual output test (see “Manual output test” on page 52), which verifies that the controller output devices are operating properly. It is located on the Tracer ZN521 circuit board as shown in Figure 19. You must remove the cover to access the Test button.

Figure 19. Tracer ZN521 zone controller circuit board

Green (status)

LED

Test button

Neuron ID label

Yellow

(communication)

LED

CNT-SVX07C-EN

51

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Image 61
Trane N512, Zone Controller, CNT-SVX07C-EN manual Test button, Tracer ZN521 zone controller circuit board