Alpha ALPHA6000 Series - Page 191

Chapter6 Troubleshooting
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191
Fault
display
Name of
protection
Possible reasons of fault Actions
OC2
Over current
in Dec process
●Too short decelerating
time
●Inertia torque of the
load is big.
●Too low ac drive’s
power
●Output load of the ac
drive is short circuited
●Increase decelerate time
●Add appropriate braking
component
●Select a high-power ac
drive
●Check resistance of the
motor’s winding; check
insulation of the motor
OC3
Over current
in
constant-speed
Operation
●Abnormity Load
●Too short accelerating/
decelerating time setting
●Low voltage of power
supply
●Too low ac drive’s
power
●Output load of the ac
drive is short circuited
●Check the load
●Add accelerate/decelerate
time properly
●Check input power supply
●Select the ac drive with
higher power
●Check resistance of the
motor’s winding; check
insulation of the motor
Ou1
Over Voltage
in acceleration
process
●Abnormity Input
voltage
●Too short accelerating
time setting
●Check input power
supply/ the setting of
detection level
● Increase accelerating
time.
Ou2
Over voltage
in
deceleration
process
●Abnormity input
voltage
●Too short decelerating
time setting
●Inertia torque of the
load is big
●Check input power
supply/ the setting of
detection level
●Increase decelerating time
properly
●Add appropriate braking
component
Ou3
Over voltage
in constant
speed
Operation
●Abnormity input
voltage
●Too short accelerating/
decelerating time setting
●Inertia torque of the
load is big
●Check input power
supply/ the setting of
detection level
●Increase decelerating time
properly
●Add appropriate braking
component