42 CNT-SVX11A-EN
Replacing Circuit Boards
Tracer ZN524 Unit Controller
Replacement
WARNING
Hazardous Voltage!
Disconnect all electric power, including
remote disconnects before servicing.
Follow proper lockout/tagout proce-
dures to ensure the power can not be
inadvertently energized. Failure to dis-
connect power before servicing could
result in death or serious injury.
1. Disconnect power or disable the
circuit breaker to unit.
2. Remove bad or questionable
Tracer ZN524 controller circuit
board.
3. Install controller in the unit with
the heat-sink placement at the
top of the control box.
4. Connect the power to the circuit
board ONLY.
5. Connect Rover and properly
configure the controller, unless a
previously configured board is
purchased.
6. Power down.
7. Connect the remaining input and
output wiring to the controller and
comm wire.
8. Reapply power.
9. Complete sequence 7 and 8 above
in the installation section of this
manual.
10. Record NID numbers and unit
location
11. Refer to BAS manual for
instructions on how to configure
the new ZN524 into BAS system.
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