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Epsilon Eb and EN Drives Reference Manual
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.
Ready to Run Drive enabled, no Stop input.
Display Fault Action to Reset Bridge Disabled
Power Up Test Cycle Power Yes
NVM Invalid Reset Button or Input Line Yes
Drive Overtemp
(Epsilon drive only)
Allow Drive to cool down,
Cycle Power
Yes
Invalid Configuration
(EN drive only)
Reset Button or Input Line Yes
Power Module
Reset Button or Input Line
(for EN)
Cycle Power (for Epsilon)
Yes
Display Indication Status Description
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