UNT-SVX07B-EN 125
Diagnostics
Manual Output Test
The purpose of the manual output test sequence 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: T
he 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 the 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 at
tempt 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 subje
ct 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.
Table 47. Test sequence for 1-heat/1-cool configurations
Steps
Fan
BOP1-3
Cool Output
BOP4
(a)
(a) At the beginning of the Fan High step, the controller attempts to clear all diagnostics.
Heat Output
BOP5
Damper
BOP6
1. Off Off Off Off Closed
2. Fan High High Off Off Closed
3. Fan Medium Medium Off Off Closed
4. Fan Low Low Off Off Closed
5. Cool High On Off Closed
6. Heat High Off On Closed
7. Fresh Air Damper
(b)
(b) The fresh air damper (BOP6) only energizes during this step if binary output 6 has been configured as a
fresh air damper.
High Off Off Open
8. Exit
(c)
(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.
Note: For all 1-heat/1-cool applications including 2-pipe changeover, BOP4 energizes in the cooling test stage
and BOP5 energizes in the heat test stage.This occurs even though during normal 2-pipe changeover
operation BOP4 controls the unit valve for both cooling and heating.
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