Quattro DC Troubleshooting
113
Name
Description
Possible Causes & Corrective Action
LS Undr Voltg
(alarm)
The L-L AC voltage has fallen
below the under voltage alarm
level. The alarm level is set by
UV Alarm Level parameter.
Low Input Voltage
Check INPUT L-L VOLTS (A5) and UV
ALARM LEVEL (A4)
Verify proper input voltage and increase, if
necessary, the input AC voltage within the
proper range
Check for missing input phase
Check power line disturbances due to starting
of other equipment
Drive Accurately Reading the AC line volts
Measure the AC line volts with a meter
Compare that with the value on the digital
operator, Vab (D3) or Vca (D3)
LS Undrvolt
(fault)
The L-L AC voltage has fallen
below the under voltage fault
level. The fault level is set by
UV FAULT Level parameter.
Low Input Voltage
Check INPUT L-L VOLTS (A5) and UV
ALARM LEVEL (A4)
Verify proper input voltage and increase, if
necessary, the input AC voltage within the
proper range
Check for missing input phase
Check power line disturbances due to starting
of other equipment
Drive Accurately Reading the AC line volts
Measure the AC line volts with a meter
Compare that with the value on the digital
operator, Vab (D3) or Vca (D3)
Module A IGBT
A de-saturation condition has
been detected on the specified
motor side IGBT power
module.
Note: Module B or C IGBT fault
should not occur. If that is
reported change the motor side
product interface board.
Bridge failure
Turn the power off on the drive; wait for the
bus to drop to zero. Measure at F3, 4 for DC
voltage. Once at zero volts go to the next step.
With an ohm meter check on the upper gate
board from phase A, B, C to + then – (on the
cap board) then reverse the leads and check
again from + then -. Next do the same check
on the lower MS gating board, check from the
(+) output to the + then – connections on the
cap board, then (-) output to the + then – on
the cap board, reverse the leads do it again.
If anything reads shorted, then that would
indicate an IGBT failure. Call Magnetek to
confirm results and get advice on what to do
next.
Motor Problem
Check motor armature and wiring for short
circuits
Product Interface Problem
Try replacing the board
Monitor Rev
The revision level of the
monitor data structure shared
between the line and motor
side processors does not
match.
Software Problem
Re-load proper software into both processors
Содержание Quattro DC
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Страница 160: ...Appendix Input Voltage Requirements 158 Figure 39 200A Application Guide Figure 40 250A Application Guide...
Страница 161: ...Appendix Input Voltage Requirements 159 Figure 41 300A Application Guide...
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