Magnetek Elevator Quattro DC - Page 112

Quattro DC Troubleshooting
110
Name Description
Possible Causes & Corrective Action
LS HIT TRQ LMT
(alarm)
The line side is or was being
limited by the motoring current
limit or regenerative current
limit setting. This can limit
current into the dc bus leading
to an under-voltage condition,
or limit current into the line
leading to a bus over-voltage
condition.
Improper Line Side Menu Parameters (A5)
 Verify and correct all Line side (A5) parameter
data
Low Line Voltage
 Input line voltage is too low causing current to
be too high for the operating power level
Verify INPUT L-L VOLTAGE (A5)
LS HW/SW
Motor side software is installed
in the line side control board
and cube id is for line side
Mismatching cube ids vs. software
 Replace A1 board with correct software for
board location or program correct software
into Line Side Board
LS I Conn Off
The line side power interface
board has detected a missing
or loose connector on the
motor side.
Missing Connector
 Verify JP7 connector is connected and seated
properly
 Verify the current tranducers, CT1, CT2 and
CT3 connections are connected and seated
properly
LS IGBT 1,2,3
A de-saturation condition has
been detected on the line side
IGBT power module.
Note: Module 2 or 3 IGBT fault
should not occur. If that is
reported change the line 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
Field Control Problem
Open F3, 4 fuses, check if problem goes
away.
Product Interface Problem (A3 / A4)
Try replacing the board

LS IP Comm
A fault has occurred in the
communications channel
between the Line side and
Motor side processors. This
was detected on the line side.
Miscommunication problem
 Verify proper software installed in Line Side
and Motor Side processors
If re-occurs, replace PCB A2
- Replace power supply