Section 1 – Page 9
1.4
Diagnostics and Fault Handling
A number of diagnostic and fault detection circuits are incorporated in the LX amplifier
to protect the drive. Some faults like over voltage, under voltage and amplifier or motor
over temperature reset when the fault is cleared. Other faults such as short- circuit at
the motor output terminals and/or resolver fault need to be reset by cycling power.
Ixt
trip is not a fault condition, it simply folds back the current command to the DIP switch
setting until the demand is reduced.
The Ixt trip is not operational in the current command mode. See Section 6
(Special Applications) for details.
Table 1-B
Condition
Display
Drive OK
Reset Action
Required
Motor over
temperature
LED on
Auto reset on temp
drop
Amp overtemp >95°
C
LED on
Auto reset on temp
drop
Over voltage
Auto reset on return
to normal voltage
Under voltage
Auto reset on return
to normal voltage
Output short ckt
Cycle power
Resolver fault
LED on
Drive OK - contact
open
Drive OK - LED off
Cycle power
High Irms
LED on
Drive OK - on
contact closed
Not a fault.
Indicates current
limiting action.
Backup Logic
Supply
active mode
Drive OK – contact
opens for about 2
seconds then
closes. LED follows
contact action.
Re-application of
AC Line power
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