Chapter 15 Troubleshooting
86 CNT-SVN01C-EN
Initial troubleshooting
Always perform the initial troubleshooting steps listed in Table 19 before
moving on to the specific area of trouble. Perform the steps in the order
they are listed.
Table 19. Initial troubleshooting steps
Step number Action Probable cause
Step 1 Look at the red Service LED. If it is flashing once per second, the controller is
not executing the application software because the network connections and
addressing have been removed. For a complete explanation of the behavior
of this LED, see “Interpreting LEDs” on page 82.
Use the Rover service tool to restore normal operation. See the Rover Opera-
tion and Programming guide, EMTX-SVX01D-EN, for more information.
Tracer MP581 is
not configured
Step 2 Look at the green Status LED. It should be on continuously during normal
operation. A blinking Status LED indicates abnormal behavior for the Tracer
MP581. For a complete explanation of the behavior of this LED, see “Inter-
preting LEDs” on page 82.
Tracer MP581 cir-
cuit board
problem
Step 3 Set the multi-meter to measure ac voltage. Measure the voltage across the 24
Vac power terminals on the Tracer MP581 termination board (with ac power
connected). The location of the 24 Vac power terminals is shown in Figure 11
on page 20. If you see approximately 24 V (20–30 V) on those terminals, the
board is receiving adequate input power.
Tracer MP581 cir-
cuit board
problem or pro-
gramming error
Step 4 Disconnect the ac wires from the input power terminals. Set the multi-meter
to measure ac voltage. Measure the voltage across the ac wires. If you see
approximately 0 V, the board is not receiving the power it needs to run.
Input power
problem
To Next Page
Loading...
Need help?
General
