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4.3
Function indicator
RUN
：
The operation indicator light is not on when the controller is shut down, but is always
on when the controller is in normal operation.
A/M
：
Auto / manual indicator light. It is off when terminal A / M is disconnected from M,
and it is always on when terminal A / M and M are short circuited.
FAULT
：
The fault indicator is off when the controller is in normal operation, but is always on
when the controller is in fault.
F
TM 1 TYPE SCR power controller
