16
Display Descriptions of fault
Corrective measures
OL2
Motor load overlarge
1.Check motor load is not overlarge.
2.Check over-torque detection level setting (06-03).
Oca
Over current during acceleration
1.Check screws securing inverter and motor are tightened.
2.Check insulation of wiring from U-V-W to motor.
3.Increase acceleration time.
4.Decrease torque (7-02) to improve set value.
5.Replace with AC motor with larger output capacity.
OcD
Over current during deceleration
1. Check insulation of wiring from U-V-W to motor.
2.Increase deceleration time.
3.Replace with inverter with larger output capacity.
OcN
Over current during running
1.Check insulation of wiring from U-V-W to motor.
2.Check motor running normally.
3.Replace inverter with larger output capacity.
EF
Output of inverter stops when
external multifunction input
terminal(M1~M3) is set to emergency
stop
Depress RESET key after alarm eliminated.
CF1
Inner memory IC data writing alarm
1.Supply power again after power off.
2.Factory maintenance and overhaul.
CF2
Inner memory IC data reading alarm
1.Depress RESET key and reset parameter to factory
setting.
2.If unavailable, search for factory maintenance and
overhaul.
CF3
Inverter detects wiring fault (with
seven categories from CF3.1 to
CF3.7)
Factory maintenance and overhaul.
HPF
Control device protection wiring fault
(Three types: HPF.1,HPF.2,HPF.3)
Factory maintenance and overhaul.
b.b
When external multifunction terminals
(MI1, MI2, and MI3) is set to this
function and GND is closed, inverter
output stops.
b.b shall disappear immediately after signal source
eliminated.
CFa
Auto accel/decel mode failure
1.Check inverter complies with motor properly.
2.Load back up inertia overlarge.
3.Sudden load variation.
CE1
Communication fault
1.Check communication signals were not connection
(SG+,SG-).
2.Check communication format is proper.
CODE
Software protection activation
Factory maintenance and overhaul.
