134
5.Short circuit between
inverter and output side.
LCE
Current limiting
fault
1.The motor stall or load
transients is too strong.
2.The power of the inverter
is too low.
1.Reduce the load,Check the
motor and mechanical
conditions.
2.Select an inverter with bigger
power.
GF
Phase short
circuit
Short circuit between
motor lines
Check motor line insulation
ECE
Encoder failure 1. Unconnected encoder
2. Encoder failure
1. Check the encoder wiring
2. Seek technical support from
manufacturers
7.2 Common faults and solutions
7.2.1 No display after power on
Inspect whether the power supply voltage is the same as the inverter rated voltage. If the
power supply has problem, inspect and solve it. Check whether the three-phase rectifier
bridge is in good condition. If the rectifier bridge is broken, please, ask for service.
Check whether the “CHARGE” lamp is lighten,if not,the rectifier bridge or buffer
resistance may be with fault;
If the lamp is lighten,maybe the switching power supply is fault, please ask for service.
7.2.2 Power supply air switch trips off when power on
Inspect whether the input power supply is grounded or short circuit. Please solve the
problem. Inspect whether the rectify bridge has been burnt or not. If it is damaged, ask for
service.
7.2.3 Motor doesn’t move after inverter running
Inspect if there is balanced three-phase output among U, V, W. If yes, then motor could
be damaged, or mechanically locked. Please solve it.If the output is unbalanced or lost,
the inverter drive board or the output module may be damaged, ask for service.
7.2.4 Inverter displays normally when power on, but power supply air swith at the
input side trips when running
