Emerson Control Techniques Epsilon Eb-202, Installation Manual, Page: 68 / 134

53
Diagnostics and Troubleshooting
Fault Codes
A number of diagnostic and fault detection circuits are
incorporated to protect the drive. Some faults, like high DC bus
and amplifier or motor over temperature, can be reset with the
Reset button on the front of the drive or the Reset input
function. Other faults, such as encoder faults, can only be reset
by cycling power “Off” (wait until the status display turns
“Off”), then power “On”.
The drive accurately tracks motor position during fault
conditions. For example, if there is a Low DC Bus fault where
the power stage is disabled, the drive will continue to track the
motor’s position provided the logic power is not interrupted.
The +/- Travel Limit faults are automatically cleared when the
fault condition is removed. The table below lists all the fault
codes in priority order from highest to lowest. This means that
if two faults are active, only the higher priority fault will be
displayed.
Display Fault Action to Reset Bridge Disabled
NVM Invalid Button or Input Yes
Drive Overtemp
Cool down,
Cycle Power
Yes
Power Module Power Yes
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