Maintenance/Troubleshooting - Power problems
a - 12 • • • Intelli-FLEX II product guide
Incorrect system settings and adjustments
When the system is installed properly, on a tight, well maintained fence, and all
possible problems with the sensor cable and system power have been eliminated,
but a high nuisance alarm rate is still experienced, the system settings and
adjustments must be inspected to make sure the processor is matched to the
fence.
The Adaptive algorithms used by the Intelli-FLEX II processor are most effective
when the preamplifier gain, and the event thresholds are set properly.
Power problems
This section describes typical problems that might be encountered when
operating the Intelli-FLEX II processor from different types of power sources.
Power fail shutdown
A power fail shutdown is not a supervision alarm, because when this condition
occurs the processor goes off line. This condition causes the supervision alarm
relay, normally-closed contacts to close. The normally-closed contacts of the alarm
relays also close.
Indication
A power fail shutdown is indicated on the processor board when the supervision
and alarm relays for both zones, normally-closed contacts close, and all the LEDs
on the processor board light. The LEDs will remain lit until the voltage drains.
A power fail shutdown is indicated briefly on the Configuration module when the
display momentarily shows
dc
the
Alarm
and
Supervisor
LEDs light, and the
alarm beeper momentarily sounds. The display and all LEDs go off, except the
Monitor
LED which stays lit until DC voltage is too low to light it.
Conditions
The power fail shutdown occurs when DC voltage on the VDD line TP-2 drops
below 8 volts. The condition clears and the processor restarts when the voltage
on the VDD line is 11 volts.
