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Display
code
Descriptions of
fault
Possible cause of fault
Corrective measures
too low.
The capacity of Inverter is too small.
Replace with Inverter with larger output
capacity.
ou
Inverter detects
over voltage at
DC high voltage
side.
The deceleration time is too short.
Increase deceleration time.
Potential energy load or load inertia
torque is large
Add proper dynamic braking components.
oH
Radiator
overheating
The ambient environment is over
heat.
Check that ambient environment is not
over heat.
The wind hole is blocked.
Clean the wind hole.
The air fan is broken.
Replace the air fan.
Converter Module is abnormal.
Seek services.
ol
Inverter is
overloaded.
The acceleration time is too short.
Prolong acceleration time.
DC braking amount is too large.
Decrease DC braking current and prolong
braking time.
V/F curve is not proper.
Adjust V/F curve and torque upgrade
amount.
The voltage of the power supply is
too low.
Check the voltage of the power supply.
Overloaded.
Select AC motor drive with larger
capacity.
Ol2
Motor load
overlarge
V/F curve is not proper.
Adjust V/F curve and torque upgrade
amount.
ef
External
equipment fault
The voltage of the power supply is
too low.
Check the voltage of the power supply.
General-purpose machine is
running in a long-term low-speed
with heavy load.
Select special purpose motor for
long-term low-speed running.
Incorrect motor overload protection
coefficient setting
Set motor overload protection coefficient
correctly.
Motor stalled or load mutation
become larger.
Check motor load is not over-large.
External terminal EF-DCM closed
External fault occurs
cf1
Inner memory IC
data writing fault
Inner memory IC data writing fault
1. Supply power again after power off.
2.Factory maintenance and overhaul
cf2
Inner memory IC
data reading fault
Inner memory IC data reading fault
1.Depress RESET key and reset
parameter to factory setting.
2.If unavailable, search for factory
maintenance and overhaul.
cf3
AC motor drive
detects wiring
fault
Interconnector of AC motor drive is
abnormal.
External troubleshooting, then disconnect
the external terminal
Check the input power supply, restart after
it returns normal.