5-6
This section contains explanations of fault messages that may appear on the 4100ES user
interface when using the SPS. Heading text in the left margin shows the error message,
while the paragraph next to it describes the likely cause of the message.
There is no output voltage from the power supply.
Appears if one or more extra devices are present on the loop, i.e., devices that have not
been configured for the IDNet channel.. Only one message appears, regardless of the
number of extra devices found.
There is an open circuit fault detected on the IDNet channel. A hardware reset is required
to reset the fault indication.
Comes up during the Earth Fault Search diagnostic function. Once the search is initiated,
the front panel display indicates how far along the search process has progressed (10%,
25%… 75%), and then shows the results of the search. The result either identifies the
offending circuit or indicates that the earth fault could not be found. SPS circuits (IDNet,
NAC, and aux power) are searched. System alarm and fault processing is suspended
during the search.
Appears when a short circuit fault is detected on the IDNet channel. This status clears
automatically when the short circuit is removed.
Appears when each device on the IDNet channel has been configured, but none of the
configured devices are communicating on the channel. This message does not appear if
there are no configured devices on the IDNet channel.
Occurs when the 4100ES is put into a diagnostic mode and finds a device not responding,
or responding unreliably. Refer to the 4100 Fault Finding Guide (LT0565) for
information on how to perform this diagnostic.
Occurs when 24V is not present on TrueAlarm devices or when TrueAlarm sensor bases
with relay driver outputs are not properly supervised or when isolator devices are in
isolation mode.
Troubleshooting an SPS
Overview
IDNet Power
Monitor Trouble
Extra Device
Class A Trouble
Earth Fault Search
Short Circuit
Channel Fail
No Answer/
Bad Answer
Output Abnormal
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