Magnetek IMPULSE G+ Mini Technical Manual page 140

Fault
UL2
Upper Limit 2—STOP Indicator. Upper Limit
2—STOP switch status is changed.
Upper Limit 2 Err
UL3
Upper Limit 3—Weighted Stop. Upper Limit
weighted limit switch tripped.
Upper Limit 3 Err
UT1
Undertorque Detection 1. The current is less
than L06.02 for more than L06.03
Undertorque Det 1
UT2
Undertorque Detection 2. The current is less
than L06.05 for more than L06.06
Undertorque Det 2
Uv
Undervoltage Fault. Undervoltage status occurs
(Flashing)
for more than 2 sec during STOP. Input voltage
DC Bus Undervolt
drops below 190V DC or less for 230V AC class,
380V DC or less for 460V AC class.
Uv1
Undervoltage 1 Fault. Undervoltage status
occurs for more than 2 sec during RUN
DC Bus Undervolt
command. Input voltage drops below 190V DC
or less for 230V AC class, 380V DC or less for
460V AC class.
Uv2
Undervoltage 2 Fault. The VFD detected a loss
of the 24V logic power supply voltage.
CTL PS Undervolt
Uv3
MC Fault. The pre-charge contactor opened
during operation.
MC Answerback
Fault or Indicator Name/Description Corrective Action
1. May not require corrective action.
2. Check the position of the Limit Switch.
3. Check the condition of the Limit Switch.
4. Check the conditions of/for terminal H01.XX
(U01.10)
1. May not require corrective action.
2. Check the position of the Limit Switch.
3. Check the condition of the Limit Switch.
4. Check the conditions of/for terminal H01.XX
(U01.10)
1. Check settings.
2. Check motor coupling.
1. Check settings.
2. Check motor coupling.
1. Check the power source wiring.
2. Replace any bad branch fuses.
3. Check collector system.
1. Check power supply wiring.
2. Correct the line voltage.
3. Check collector system.
1. Check power supply wiring.
2. Correct the line voltage.
3. Check collector system.
1. Check power supply wiring.
2. Correct the line voltage.
3. Check collector system.
4. Wait 30-45 seconds before restarting VFD after
auto shut down.
IMPULSE
®
•G+ Mini Technical Manual
November 2020
Page 140