IMPULSE
®
•G+ Mini Technical Manual
November 2020
Page 140
UL2
Upper Limit 2 Err
Upper Limit 2—STOP Indicator.
Upper Limit
2—STOP switch status is changed.
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)
UL3
Upper Limit 3 Err
Upper Limit 3—Weighted Stop.
Upper Limit
weighted limit switch tripped.
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)
UT1
Undertorque Det 1
Undertorque Detection 1.
The current is less
than L06.02 for more than L06.03
1.
Check settings.
2.
Check motor coupling.
UT2
Undertorque Det 2
Undertorque Detection 2.
The current is less
than L06.05 for more than L06.06
1.
Check settings.
2.
Check motor coupling.
Uv
(Flashing)
DC Bus Undervolt
Undervoltage Fault.
Undervoltage status occurs
for more than 2 sec during STOP. Input voltage
drops below 190V DC or less for 230V AC class,
380V DC or less for 460V AC class.
1.
Check the power source wiring.
2.
Replace any bad branch fuses.
3.
Check collector system.
Uv1
DC Bus Undervolt
Undervoltage 1 Fault.
Undervoltage status
occurs for more than 2 sec during RUN
command. Input voltage drops below 190V DC
or less for 230V AC class, 380V DC or less for
460V AC class.
1.
Check power supply wiring.
2.
Correct the line voltage.
3.
Check collector system.
Uv2
CTL PS Undervolt
Undervoltage 2 Fault.
The VFD detected a loss
of the 24V logic power supply voltage.
1.
Check power supply wiring.
2.
Correct the line voltage.
3.
Check collector system.
Uv3
MC Answerback
MC Fault.
The pre-charge contactor opened
during operation.
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.
Fault
Fault or Indicator Name/Description
Corrective Action
Summary of Contents for IMPULSE G+ Mini
Page 15: ...IMPULSE G Mini Technical Manual November 2020 Page 15 Figure 2 1 Long Time Storage...
Page 18: ...IMPULSE G Mini Technical Manual November 2020 Page 18 Figure 2 4 Diagram C...
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Page 182: ...IMPULSE G Mini Adjustable Frequency Crane Controls Technical Manual November 2020...
