Chapter 7 Troubleshooting
96
No.
Fault
code
Failure type
Possible causes
Solutions
8 E.oU2 Overvoltage when
decelerating
1. Decelerated too quickly
2. Large load inertia
3. Input voltage is
abnormal
1. Increase deceleration
time
2. Increasing braking
components of energy
consumption
3. Check input power
9 E.oU3 Overvoltage
constant speed
1. Input voltage has
abnormal changes
2. Large load inertia
1. Install input reactor
2. Add suitable braking
components
10 E.LU Bus undervoltage
Shutdown display
1. Mains voltage is low
2. Parameters are set
incorrectly
3. Shutdown prompt
1. Check mains input
power
2. Check whether
parameters are correct
11 E.oL1 Motor Overload
1. Mains voltage is too low
2. Motor rated current is
set incorrectly
3. Motor stall or mutation
load is too large
4. The big car Mara
1. Check mains voltage
2. Reset rated motor
current
3. Check the load, and
adjust torque boost
4. Select the appropriate
motor
12 E.oL2 Inverter overload
1. Accelerated too quickly
2. Restart the motor that is
rotating
3. Mains voltage is too low
4. Overload
1. Increase acceleration
time
2. Avoid re-starting at the
state of stop
3. Check mains voltage
4. Choose the inverter
with larger power
16 E.oH2 Inverter module
overheating
1. Instantaneous
overcurrent of inverter
2. Output three-phase is
interphase or shorted to
ground
3. Air duct blockage or
damage
4. The ambient
temperature is too high
5. The wires or plug-ins of
dashboard loosed
6. Auxiliary power supply
is damaged, the inverter is
undervoltage
7. Straight through of
power module bridge
8. The control panel is
1. See the solutions on
overcurrent
2. Re-wiring
3. Clean or replace the
air duct
4. Decrease the ambient
temperature
5. Check and reconnect
6. Seek for service
7. Seek for service
8. Seek for service
