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Trips and Fault Finding
7-7
590+ Series DC Digital Converter
Power Board LED Trip Information (Frame 4, 5 & H)
The HEATSINK TRIP, 3 PHASE FAILED and ACCTS FAILED trips are associated with the
following LED indications:
Frame 4
Check the LEDs on the power board for more HEATSINK TRIP information.
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
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.
Frame H
The power board has six LEDs indicating further trip information, and general status of the unit.
The LEDs go out to indicate a problem (note that LED1 may also flash as the SMPS attempts to
power-up repeatedly, indicating a fault).
FIELD HEATSINK
STACK THERMOSTATS
field heatsink temperature normal
armature heatsink temperature normal
HEATSINK TRIP
3 PHASE FAILED
Trips
TRIGGER BOARD PRESENT
ACCTS PRESENT
THYRISTOR FUSES
LED2
LED5
LED4
LED3
LED6
SMPS OK
LED1
thyristor fuses status
ac current transformer connection status
trigger board connection status
switched mode power supply on
ACCTS FAILED
Power Board
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)