STEP ET Series - Page 155

Chapter 8 Troubleshooting
ET/EP/EH Series Intelligent Flexible Driver Manual
- 145 -
Error
code
Fault display
Possible causes
Countermeasures
power grid
imbalance
voltage
Abnormal drive board
sampling circuit
Abnormal circuit sampling
55
Fault of
power grid
phase
sequence
Abnormal input wiring
Adjust the input wiring order
56
Fault of
power grid
undervoltage
Power grid voltage below
300 V
The network voltage is too low
Abnormal drive board communication
57
Fault of
power grid
overvoltage
Power grid voltage over
540 V
Power grid voltage too high
Abnormal drive board communication