7-20 Trips and Fault Finding
DC590+ DRV Series DC Digital Drive
Trip Message and Meaning Possible Reason for Trip Corrective Action
AC current transformer plug
connection to drive power board
missing
Check armature current transformer plug for correct
installation.
ACCTS FAILED
The trip prevents the contactor
closing and the current loop activating
without armature current feedback -
important in the case of external stack
drives where the thyristor stack is
remote from the control board.
Frame 5 only: Load imbalance between the two parallel power stacks
Residual motor flux when field supply
is disconnected
Series fields are not recommended for regenerative
drives and the series field winding should normally be
left open circuit.
If a series field is required, either lock the motor shaft or
temporarily disconnect the series field and repeat the
AUTOTUNE procedure
Permanent magnet motor Lock motor armature and repeat Autotuning procedure
AUTOTUNE ERROR
Motor rotation detected during
Autotune process (speed feedback
has exceeded 20% of rated speed), or
field current detected during Autotune
(field current feedback has exceeded
6% of rated field current)
(Alarm only operates during the
Autotune sequence)
Separately supplied field Disable external field supply and repeat Autotuning
procedure
Wrong AUTOTUNE sequence
followed
Repeat AUTOTUNE procedure AUTOTUNE ABORT
The Autotune sequence has been
aborted. Coast Stop, Program Stop,
Enable or Start/Run commands
removed before AUTOTUNE
procedure completed
AUTOTUNE incomplete. (After 2
minutes the drive will time-out if still
in AUTOTUNE mode)
Repeat AUTOTUNE procedure. If problem persists,
contact Parker SSD Drives customer service
SEQ PRE READY Coding not present. Replace power board or chassis.
CONTACTOR DELAY The internal auxiliary 3-phase
contactor failed to close.
Check the position of the Calibration Scaling Switch -
refer to
Calibration Checks, page 7-4
EXTERNAL TRIP
Customer alarm!
Trip operates if input open or high
impedance
Alarm time delay : 15 seconds
Device not wired to drive or device
open circuited
Check C1 to C2 connections to drive - connect C1 to C2
if customer device not fitted.
REMOTE TRIP Drive not set for remote operation Check setting of AUX I/O::REM. SEQUENCE parameter
Also see AUX I/O::REM. SEQ. ENABLE parameter
(Remote Trip flag set to zero.)
ENABLE LOW Local Mode run with Enable input low
SEQUENCING Internal sequencing error Contact Parker SSD Drives
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