Appendix “a – Pinnacle Systems NSD User Manual
Page 19
AA - 2
Appendix “A”
Troubleshooting
PROBLEM:
Zone 1 relay off, should be on
Cause(s):
Relay found in the wrong state; circuitry
failure or relay failure.
Cure:
Call for assistance.
PROBLEM:
External relay contact welded/cut
Cause:
External relay check input remained
open (0 volts) while the zone was de-
energized.
Cure:
When the zone is de-energized (RED),
your external relay must close within
1/4 second.
PROBLEM:
External relay contact short
Cause:
External relay check input remained
closed (voltage applied) while the zone
was energized.
Cure:
When the zone is energized, the
secondary pole of your external relay
(N.C.) must open up within 1/4 second.
PROBLEM:
Mat # out of sequence
Cause:
The master and slave processors
disagree on which sequence they are
on.
Cure:
Could have an electrical noise problem
causing one of the processors to loose
sequence.
PROBLEM:
Ram failure
Cause:
Microprocessor failed the internal
memory test.
Cure:
Call for assistance.
PROBLEM:
Power failure
Cause:
Circuitry failure; brown out.
Cure:
Call for assistance.
PROBLEM:
Watchdog failure
Cause:
Watchdog circuitry failure.
Cure:
Call for assistance.
PROBLEM:
Serial data corrupted
Cause:
Electrical noise getting into the control
box causing one of the computer to
reset.
Cure:
Place MOV’s across the coil of any
device (outside this control) switched
on/off by the relay outputs of this
controller.
PROBLEM:
Serial data transmission incomplete
Cause:
Electrical noise getting into the control
box causing one of the computer to
reset.
Cure:
Place MOV’s across the coil of any
device (outside this control) switched
on/off by the relay outputs of this
controller.
PROBLEM:
Master relay on, Slave relay off
Cause(s):
The master processor disagrees with
the slave.
Cure:
Call for assistance.
PROBLEM:
Slave relay on, Master relay off
Cause:
The slave processor disagrees with the
master.
Cure:
Call for assistance.