Trane Tracer ZN521, Инструкция по установке и эксплуатации

Страница: 43 / 60

CNT-SVX07D-EN 43
Status indicators for operation and communication
This chapter describes the operation and communication status indicators on the Tracer ZN521
controller, including:
• A description of the location and function of the Test button and Service pin button and the light-
emitting diodes (LEDs) located on the controller
• A complete list of the diagnostics that can occur, their effect on controller 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 43),
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
Manual output test
The manual output test sequentially turns on and off all binary outputs to verify their operation.
The test overrides normal operation of the controller, which is suspended while the test is being
performed.
Use the manual output test to:
•
Verify output wiring and operation
• Force the water valve(s) open to balance the hydronic system
• Clear diagnostics and restore normal operation (although not a primary function of the manual
output test)
The manual output test is performed either by repeatedly pressing the Test button to proceed
through the test sequence or by using the Rover service tool. Table 11 on page 45 lists the outputs
for non-face-and-bypass unit configurations in the sequence in which they are verified; Table 12 on
page 46 lists the outputs for face-and-bypass unit configurations in the sequence in which they are
verified.
Green (status)
LED
Test button
Neuron ID label
Yellow
(communication)
LED
Red (service) LED
Service pin button