ABB REF 54 Series Operator's Manual page 30

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Operator's Manual
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Three different functions are embedded in the Ready LED indicator.
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Normal operation
• No internal faults
• Auxiliary voltage is available
An internal relay fault (IRF) has occurred but the
auxiliary voltage is connected
• When an internal fault occurs, a message is
received in the assisting window, provided the
HMI/MIMIC panel is operative
• The IRF LED indicator is latching
OR
The terminal is in test mode
The auxiliary voltage supply to the terminal has
been disconnected.
Check that the auxiliary voltage is
!
disconnected before taking any further
action
1MRS 750500-MUM