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Chapter 5 The System Power Supply (SPS)
Troubleshooting
Overview This section contains explanations of trouble messages that may appear on the 4100ES display
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.
IDNet Power
Monitor Trouble
There is no output voltage from the power supply.
Extra Device Appears if one or more extra devices (i.e., devices that have not been configured for the IDNet
channel) are one the system. Only one message appears, regardless of the number of extra
devices found.
Class A Trouble There is an open on the IDNet channel. A hardware reset is required to reset the trouble.
Earth Fault
Search
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 trouble processing is suspended during the search.
Short Circuit Appears when a short is detected on the IDNet channel. This status clears automatically when
the short circuit is removed.
Channel Fail Appears when each device on the IDNet channel has been configured, and when none of the
devices are communicating on the channel. This message does not appear if there are no
configured devices on the IDNet channel.
No Answer/Bad
Answer
Occurs when the 4100ES is put into a diagnostic mode and finds a device not responding, or
responding unreliably. Refer to the ES Panel Programmer’s Manual (574-849) for information
on how to perform this diagnostic.
Output Abnormal Occurs when 24 VDC 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.
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