Quattro DC Troubleshooting
105
Name Description
Possible Causes & Corrective Action
Extrn Fault 3
User defined external logic fault
input
...Closure of this contact will
cause the drive to declare the
fault
Check Parameter Settings and External Fault
Signal Wiring
Check the correct logic input is configured for
the correct TB1 terminal and set to EXTRN
FAULT 3 (C2)
Verify the source of the external fault signal.
Extrn Fault 4
User defined external logic fault
input
...Opening of this contact will
cause the drive to declare the
fault
Check Parameter Settings and External Fault
Signal Wiring
Check the correct logic input is configured for
the correct TB1 terminal and set to EXTRN
/FLT 4 (C2)
Verify the source of the external fault signal.
Field Ground The hardware has detected a
ground fault in the field circuit.
Check Motor Field wiring
Check motor field wiring and motor field for
insulation breakdown or unintentional contact
to other objects
Verify the wires on TB1 on field module are
connected in the correct terminals.
Measure the low voltage power supplies on
the LV Power distribution board (A10), replace
power supply if out of tolerance.
On the motor side product interface board
measure TPP14 (2.5V) to TPP36 (AC) if
reading incorrect replace the board.
On the motor side product interface board
measure TPP4 (IFLD_O) to TPP36 (AC) and
TPP5 (IFLD_I) to TPP36 (AC), these are
inputs from the current feedback on the field
module if they don’t match replace the field
module.
Field I REG
The field regulator cannot
regulate properly. If using the
Low voltage field module verify
that there is enough bus
voltage to operate at the full
field level. Temporarily
increase the DC bus boost (A5)
to 75, then order a high voltage
field module.
Check motor field and wiring
Verify motor field and motor wirings are not
open
Verify A24J1 (Field Module) and A4JP1
(Motor-Side Product Interface PCB)
connections
Check Parameter Settings
Verify proper setting for FULL FLD CURR
(A6), WEAK FLD CURR (A6), and STANDBY
FIELD (A6)
Hardware Failure
Field IGBT
A de-saturation condition has
been detected on a field power
bridge IGBT.
Check motor field and wiring
Verify motor field and motor wirings are not
shorted
If re-occurs and the motor field and wirings are
okay, suspect a defective field module IGBT
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