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This section describes the messages that may appear on the 4100 display when using the SPS or
RPS. Trouble messages appear on the left as titles, and possible causes are listed to the right in the
text.
Indicates AC power to the system is absent or is lower than 85% of nominal (102 VAC for a
120 VAC system).
This Trouble is active when a NAC-to-NAC short is detected. The NACs that are shorted are also
indicated. Any combination of NACs can be mis-wired together. The panel will display up to four
NAC miswiring faults.
There is a wiring fault to Earth on a positive polarity signal. Possible wires are +IDNet, +24 V,
NAC + (Alarm), NAC – (Standby), and AUX+.
There is a wiring fault to Earth on a negative polarity signal. Possible wires are -IDNet, 0 V,
NAC - (Alarm), NAC + (Standby), and AUX–.
This signal indicates that the overcurrent circuit is tripped and latched OFF. A reset from the master
control unit is required to recover.
IDNet power has failed. This usually requires changing the SPS.
Indicates that battery voltage has fallen to 22.4 VDC (low) or 19.6 VDC (depleted).
Troubleshooting
Overview
AC Power Loss
NAC Miswired
Trouble
Positive Earth Fault
Negative Earth Fault
Overcurrent Trouble
IDNet Power
Battery Not
Connected/
Battery Depleted/
Battery Low
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