5. System Operation
PowerShift User Manual Version B Page 15
Circuit
1, 2 or 3
LED
Module
“X” LED
Alarm
Condition
(GUI & Relay)
Description
Solid
Green
Yellow
Solid
Major Circuits are functioning, but a module-level fault has occurred.
The condition may not require immediate attention and can be corrected in the
next available service window (e.g., the module can continue to run with the
failure of one fan, until the module can be replaced).
Possible cause – Fan failure or other module-level failure
- Use the GUI to obtain additional status details for the module failure, or
replace the module
Yellow
Blink
Yellow
Blink
Critical Circuit is in alarm, no output power on the alarmed circuit
Possible cause - Overload or Short-Circuit
- Circuit is shut down to protect itself from over-current condition
- Possible causes: Excess current demand (failed radio), a short in the trunk
cable, etc.
- Module will sense the circuit condition about every 3 seconds (the circuit LED
briefly flashes green) to see if the fault condition has cleared
- After 20 minutes if condition is not cleared then circuit latches off; fault must
be cleared and input power cycled to re-enable output
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