ZN010, ZN510, and ZN520 Controllers
UNT-SVX07E-EN
137
Yellow Comm LED
The yellow comm LED blinks at the
rate the controller receives communication. The yellow
LED does not blink when the controller is transmitting
communication data. Refer to
Table 74
.
Red Service LED
The red LED normally indicates if the
unit controller is operating properly or not. Refer to
Table 75
.
Note:
If the service push button is held down for more
than 15 seconds, the Tracer controller will uninstall
itself from the ICS communication network and
shut down all unit operation. This mode is
indicated by the red Service LED flashing once
every second. See the Red Service LED section. Use
the Rover service tool to restore the unit to normal
operation. Refer to the service tool product
literature for more information
Manual Output Test
The purpose of the manual output test sequence for Tracer
ZN010, ZN510, and ZN520 controllers is to verify output
and end device operation. Use the manual output test to:
•
Verify output wiring and operation without using
Rover, service tool
•
Force the water valve to open and balance the hydronic
system
Note:
The manual output test is not an automatic cycle.
You must press the TEST button to proceed
through each step.
The controller observes all diagnostics that occur during
the test sequence. Although an automatic diagnostic reset
sequence exists as part of the controller’s normal
operation, the automatic diagnostic reset feature is not
active during the test sequence.
If left in an individual test step, the controller remains in
test mode for 60 minutes and then exits to normal
operation.
Many service calls are due to unit diagnostics. The test
sequence resets unit diagnostics and attempts to restore
normal unit operation prior to testing the outputs. If the
diagnostics remain after a reset, the STATUS LED indicates
the diagnostic condition is still present (two blinks).
Manual Output Test Procedure
Follow the procedure below to test Tracer ZN010, ZN510,
and ZN520 controllers.
1.
Press and hold the TEST button for at least two
seconds (not exceeding 5 seconds), and then release,
to start the test mode.
2. The test sequence will turn off all outputs and then
attempt to clear all diagnostics.
3. Press the TEST button several more times (no more
than once per second) to advance through the test
sequence.
The outputs are not subject to minimum times during the
test sequence. However, the test sequence only permits
one step per second which limits minimum output time.
The green LED is turned off when the TEST button is
pressed. To begin the manual output test mode, press and
hold the TEST button (turning off the green LED) for at least
two seconds.The green LED will begin to blink, indicating
the controller is in test mode. See
Table 76
.
Table 74.
Yellow comm LED activity for Tracer ZN010,
ZN510, or ZN520 controllers
LED Activity
Description
Off continuously
The controller is not detecting any
communication. (Normal for standalone
applications.)
LED blinks or flickers
The controller detects communication.
(Normal for communicating applications,
including data sharing.)
LED on continuously
Abnormal condition or extremely high traffic
on the link. High traffic on the link.
Table 75. Red service LED activity for Tracer ZN010,
ZN510, or ZN520 controllers
LED Activity
Description
Off continuously after power is
applied to the controller.
Normal operation
On continuously, even when power
is first applied to the controller.
Someone is pressing the Service
button or the controller has failed.
LED flashes about once every
second.
Uninstall (normal controller mode).
To restore normal operation, use
the Rover service tool.
Black Service push button.
Use the Service button to install the
Tracer ZN520 controller in a
communication network.
Figure 104. LED light status on ZN520 controller
Green STATUS LED
Indicates whether the
controller is powered on
(24 Vac supplied)
Yellow COMM LED
Indicates if communication
is functioning
Red SERVICE LED
Indicates if service is needed
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