Maintenance
Copyright © 2008-2010 Eaton Corporation. All Rights Reserved.
IPN 997-00012-68D February 2010
47
Fast Flash (2Hz)
STS is in Inverter Bypass
mode (this refers to the
internal mode of STS, not the
position of the MBS).
Solid
Mains or inverter abnormal
Fast Flash (2Hz)
If the status of green and
yellow LED is the same, then
STS is in Inverter Bypass
mode, otherwise the Back-
feed relay is open.
Yellow
Fastest Flash
(5Hz)
STS Output is abnormal
Slow Flash (1Hz)
Fan lock, CAN
communication fail, or
EEPROM fault
Fast Flash (2Hz)
SCR short or auxiliary power
supply fault
Fastest Flash
(5Hz)
MBS position abnormal.
Red
Solid
STS Fault mode, may be
overload, over temperature,
or output short.
Note: If more than one warning exists at the same time, then the LED will display the highest
priority.
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