7-10 Trips and Fault Finding
DC590+ Series DC Digital Drive
Frame 5
The master power board (on the left hand side of the unit) is fitted with a Parallel Expansion Board. This board has four additional LEDs providing
information about the slave power board (on the right hand side of the unit), and about the general status of the unit.
The LEDs light to indicate a problem.
FLD HS OT
ARM HS OT
PHASE LOSS
field heatsink overtemperature
armature heatsink overtemperature
phase loss
HEATSINK TRIP
3 PHASE FAILED
Trips
ARM HS OT
PHASE LOSS
PH ROT FLT
CUR IMBALANCE
Master Power Board Slave Power Board
phase rotation fault
current imbalance
ACCTS FAILED
(indicated by the
MASTER
SLAVE
It is essential that the phase sequence applied
to the two stacks are identical otherwise the
converter will trip on 3 PHASE FAILED.
If there is a current imbalance between the
stacks which exceeds 10% the converter will
trip on ACCTS FAILED.
Parallel Expansion Board)
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