5-8
Chapter 5 4007ES Power Supplies
Troubleshooting
Troubleshooting The code produced by the lit indicator LEDs corresponds to a trouble occurring on the system.
See Table 5-7 for the IDNet LED definitions and Table 5-8 the 4007ES trouble messages.
Table 5-7. 4007ES System Indicator LEDs
Comm Trouble
Normally off. Turns on steady if the IDNet is
not communicating with the FACP CPU.
Figure 5-9. LEDs on the 4007ES Power Supplies
IDNet trouble
Normally off. Illuminates to indicate a problem
with the IDNet channel:
• Channel failure.
• Line short.
• Class A failure or an open line.
Earth fault+ Illuminates to indicate a positive earth fault.
Earth fault - Illuminates to indicate a negative earth fault.
IDNet LEDs:
A, B, and C
Steady ON: Indicates an open or short condi-
tion on indicated loop.
LEDs
Earth Fault+
Loop A Loop B Loop C
Earth Fault -
IDNet
Trouble
Comm
Trouble
Table 5-8. 4007ES System Trouble Messages
Message Definition
AC Fail AC power is not present or is too low for proper system operation.
Low Battery The battery voltage is below the 22.8 V nominal level by 10% or more.
Depleted/Missing
Battery
The battery is either below 19.4 V or completely undetected.
Card Overcurrent The module is drawing more current than it should. Check for faults on the circuit.
Charger Trouble The battery charger is either defective or being heavily loaded by batteries. Read charger
current at front panel, if charger current is approximately 1.4 A, batteries are likely loading
the charger. Remove battery connection and measure the output. If the output is 27.6 (or
close, temperature dependent), there is a possibility of depleted batteries or a bad set of
batteries. Allow batteries to charge or replace them if they do not take a charge.
If the current is ~1.4 A with batteries and charger voltage below 20 V, remove the
batteries and recheck the charger voltage. If the voltage is around ~27.3 V, then the
batteries are heavily depleted.
Extra Device Appears if one or more extra devices (i.e., devices that have not been configured for the
IDNAC or IDNet channel) are on the system. Only one message appears, regardless of
the number of extra devices found.
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. During the search of
circuits (IDNet, NAC,IDNAC, and aux power), system alarm and trouble processing is
suspended.
Positive Earth Appears when a positive earth fault is detected.
Negative Earth Appears when a negative earth fault is detected.
Short Circuit Appears when a short is detected on the IDNAC/NAC 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 IDNAC channel.
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