Magnetek Quattro DC Elevator Drive Benutzerhandbuch

Quattro DC Troubleshooting

Name Description

Possible Causes & Corrective Action

Undervolt Flt

Generated during a run
condition when the DC bus
voltage drops below the user
specified percent of the DC
link voltage. The fault level is
specified by the UV Fault
Level parameter.

Low Input Voltage

Check INPUT L-L VOLTS (A5) and UV FAULT
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 DC Bus

Measure the DC bus with a meter

Compare that with the value on the digital
operator, BUS VOLTAGE (D2)

Poor Tuning of Line Side Parameters

Check DC BUS REG P GN (A5), DC BUS
REG I GN (A5), DC BUS V BOOST (A5), and
BUS VREF SOURCE (A5)

Line Converter Problem

Verify the line converter did not shutdown
while the motor controller was in process of
regeneration

UV Alarm

(alarm)

Generated during a run
condition when the DC bus
voltage drops below the user
specified percent of the dc link
voltage. The fault level is
specified by the UV Alarm
Level parameter.

Low Input Voltage

Check INPUT L-L VOLTS (A5) and UV
ALARM LEVEL (A4)