TM 5-3895-374-24-2
Problem
Cause
Solution/Reference
Key switch left OFF
Control fuse blown
PLC failure
See PLC manual
Control panel in "training"
mode
Motors fail to start
Generator sets not both
running
Interlocking not in
sequence
Control relay failure
Overload tripped
Breaker open
Motor unplugged
4-4-5. Programmable Logic Controller (PLC)
Problem
Cause
Solution/Reference
No controls operating
Processor failure (fault
light on)
Replace processor
See PLC manual
Memory failure (fault)
Replace EE module
Fuse blown in power
supply
Control circuit fuse blown
Portions of system
working - others not
Input card failure
Output card failure
Control fuse blown on
cards
See electrical drawing
AA00303
Motors fail to start
Control circuit fuse blown
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