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+24 VDC Power System User Manual (Section 6013)
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Rev. G
131
Troubleshooting Information
General
This system is designed for ease in troubleshooting and repair. The various indicators as described in "System
Operating Procedures", are designed to isolate failure to a specific element. Once the faulty element has been
identified, refer to the next sections, “REPLACEMENT INFORMATION” and "REPLACEMENT PROCEDURES".
The procedures listed in "System Maintenance", can also be used by servicing personnel in identification and/or
prevention of trouble symptoms in the system.
Adjustments
If the suspected cause of a trouble symptom is an out of adjustment condition, that particular adjustment
setting should be checked or reset using the appropriate adjustment procedure detailed in "MCA System
Adjustments". If a failed Rectifier Module, MCA, or Low Voltage Disconnect circuit card is suspected, the
adjustment procedures can also be used to verify the setpoints as well as the operation of the Rectifier Module,
MCA, or Low Voltage Disconnect circuit card.
MCA Messages
An MCA Menu Tree is provided in the separate
Installation Manual
(and on the CD furnished with your system).
Each line in the MCA Menu Tree contains a number. This number is referenced in a chart provided in
"Navigating the MCA". This chart provides a description of each line listed on the MCA Menu Tree.
If the MCA displays a system or subsystem alarm message, find the line in the MCA Menu Tree showing this
message. For an explanation of this alarm, locate the corresponding MCA Menu Tree Line Number in the chart
provided in “Navigating the MCA”.
NOTE!
If the MCA is replaced with an MCA previously used in another power system, the MCA may
reflect inventory items not in the current power system and may display alarms. In this case, update the
inventory as detailed in this section. Also, if you remove an inventory item (a component) from the
power system, you must update the inventory to clear alarms.
NOTE!
If you remove a Battery Charge Temperature Compensation Probe, alarms are displayed.
Manually set the Battery Charge Temperature Compensation feature to off as described in "MCA System
Adjustments" to clear the alarms.