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Chapter6 Troubleshooting
http://www.acdrive-china.com
192
Fault
display
Name of
protection
Possible reasons of fault
Actions
GF Ground
Fault
●
Grounding current of
output side exceeds
specified value
●
Check whether the
insulation of the motor
become bad
●
Check whether the cable
connecting the ac drive
and the motor is damaged
OH1
Heat sink
overheat
●
Ambient temperature is
too high
●
Obstruction of
ventilation channel
●
Cooling Fan does not
work
●
Lower the ambient
temperature
●
Clean the ventilation
channel
●
Replace the cooling fan
OL1
Motor
overload
●
Ac drive’s output
exceed the over loading
value of the motor
●
Improper V/F curve
●
Low AC supply voltage
●
Common motor has
operated with heavy
load at low speed for a
long time
●
Load changes fast
●
Reduce the load
●
Adjust V/F curve and
torque boost
●
Check the AC supply
voltage
●
Use a special motor if the
motor is required to
operate for a long time
●
Check the load.
OL2
Ac drive
overload
●
Ac drive’s output
exceed its overloading
value
●
DC injection braking
current is too big
●
Improper V/F curve
●
Low AC supply voltage
●
Too heavy load
●
Too short accelerating
time
●
Reduce the load, increase
accelerating time
●
Reduce the DC injection
braking current, increase
braking time
●
Adjust V/F curve and
torque boost
●
Check the AC supply
voltage
●
Select bigger capacity ac
drive.
●
Increase accelerating time
SC
Load
short-circuit
●
Ac drive’s output load is
short circuited
●
Check resistance of the
motor’s winding
●
Check the insulation of the
motor
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