Magnetek Elevator Quattro DC - Page 113

Quattro DC Troubleshooting
111
Name Description
Possible Causes & Corrective Action
LS Overcurr
The line side power converted
has detected that 280% rated
amps has been detected by the
current transducers through the
product interface PCB (A3).
Overcurrent Problem
 Check for a possible short circuit in motor or
external power wiring.
 This could also be a result of other faults
occurring first. Verify by reviewing the fault
history prior to this event.
 Encoder issue
Poor Regulator Tuning
 Check LS parameters, these are in the A5
menu. These are factory set and shouldn’t
need to be adjusted. Verify that they are at
default.
LS Overload
A
n overload condition has been
detected on the line side power
bridge.
Excessive Current Draw
 Decrease accel/decel rate
 Mechanical brake not releasing properly
Drive Sizing
 Verify drive sizing with motor ampere
requirements. May need a larger capacity
drive
LS Overtemp
(fault)
One or more of the IGBT
modules on the line side power
bridge has exceeded 95C
(203F).
Overtemperature Problems
 Verify that the two fans located under the
power module are both working properly and
rotating in the same direction
 Inspect and clean air intake filters
 Verify ambient temperature is less than 45C
 Verify drive is sized correctly
 Possible defective temperature sensor
Hardware problem
 Replace the line side product interface board
(A3)
LS Over Temp
(alarm)
One or more of the IGBT
modules on the line side power
bridge has exceeded 85C
(185F).
Overtemperature Problems
 Verify that the two fans located under the
power module are both working properly
 Inspect and clean air intake filters
 Verify ambient temperature is less than 45C
 Verify drive is sized correctly
 Possible defective temperature sensor
Hardware problem
 Replace the line side product interface board
(A3)