INVT RBU100H

RBU100H operation manual 7 Fault tracking
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7 Fault tracking
Fault is indicated by LEDs. When "TRIP" indicator is on, the RBU is in an abnormal state. Use the
information given in this chapter to find out the fault cause. If not, contact with the INVT office.
Fault
code
Fault type
Possible cause
What to do
OUt3
IGBT fault
1. IGBT module fault.
2. The connection of
the driving wires is
not good.
3. Grounding is not
properly.
1. Inspect external equipment
and eliminate interference and
press STOP/RST.
2. Ask for help
OC3
Over-current
in running
1. The RBU is
abnormal.
2. The power of RBU is
too low.
1. Check the input power
2.Select the RBU with a larger
power
3. Ask for help
OV3
Over-
voltage in
running
1. The input voltage is
abnormal.
2. There is large energy
feedback.
1. Check the input power
2. Check if the DEC time of the
load is too short or the VFD
starts during the rotation of the
motor or it needs to increase the
energy consumption
components.
3. Ask for help
OL2
RBU
overload
1. Reset the rotating
motor
2. The voltage of the
power supply is too
low.
3. The load is too
heavy.
4. Close loop vector
control, reverse
direction of the code
panel and long
low-speed operation
1. Avoid the restarting after
stopping.
2. Check the power of the supply
line
3. Select a VFD with bigger
power.
4. Select a proper motor
5. Ask for help
SPO
Output
phase loss
U,V,W phase loss input
1．Check the output distribution
2. Ask for help