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
•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 |
| 51 |
