dolycon CT100 Series - Page 149

CT100 inverter Faults and solutions
145
Code
Type
Reason
Solution
E.oU3
Constant speed
running
overvoltage
1. The input voltage has
changed abnormally
2. The load inertia is too
large
1. Install the input reactor
2. Add the appropriate
energy consumption
braking components
E.Lv
Bus
undervoltage
The grid voltage is too
low
Check the grid input
power
E.oUT1
Converter unit
U-phase fault
1. The acceleration is too
fast
2. The internal IGBT is
damaged
3. Interference causes
malfunction
4. The grounding is good
1. Increase the ACC time
2. Ask for service
3. Check if the peripheral
devices have a strong
interference source
E.oUT2
Converter unit
V-phase fault
E.oUT3
Converter unit
W-phase fault
E.oL1
Motor overload
1. The grid voltage is too
low
2. The motor rated
current is not set
correctly
3. Motor stall or load
sudden change
4. Motor power is much
larger than load power
1. Check the grid voltage
2. Reset the motor rated
current
3. Check the load and
adjust the torque boost
4. Select the appropriate
motor
E.oL2
Inverter
overload
1. The acceleration is too
fast
2. Restart the rotating
motor
3. The grid voltage is too
low
4. The load is too large
1. Reduce the
acceleration speed
2. Avoid restart at stop
3. Check the grid voltage
4. Select the inverter of
larger power
E.oL3
Overload
pre-warning
1. The load is too heavy
2. The motor parameters
are not correct during
vector control
3. The grid voltage is too
low
1. Select a larger inverter
2. Carry out motor rotation
autotuning
3. Check the grid voltage
E.oH1
Rectifier module
overheating
1. Instantaneous
overcurrent of the
inverter
1. Refer to overcurrent
solutions
2. Redistribution