Protection Features - ABB ACS 400 User Manual

P Protection Features
The ACS 400 has a number of protective features:
• Overcurrent
• Overvoltage
• Undervoltage
• Overtemperature
• Output earth fault
• Output short circuit
The ACS 400 has the following LED alarm and fault indicators:
• For location of LEDs, see section E or if ACS-PAN-A control panel is connected, see the
instructions on page 29.
Table 8
POSSIBLE CAUSES:
• Acceleration or deceleration ramp is
too fast in relation to load torque
requirement
• A short voltage interruption
Table 9
POSSIBLE CAUSES:
• Transient overcurrent
• Over-/undervoltage
• Overtemperature
• Motor overload (see section Q)
CHECK:
• the supply line for disturbances.
• the drive for mechanical problems that
might cause overcurrent.
• that the heat sink is clean.
Table 10
Red LED: blinking Green LED: on
POSSIBLE CAUSE:
• Output earth fault
• Short circuit
• DC bus ripple too large
CHECK:
• the insulation in the motor circuit.
Note! Whenever the ACS 400 detects a fault condition, the fault relay activates. The motor stops
and the ACS 400 will wait to be reset. If the fault still persists and no external cause has been
identified, contact your ACS 400 supplier.
24
• Input phase loss (3~)
• I/O terminal short circuit protection
• Motor overload protection (see Q)
• Output overload protection (see R)
• Stall protection
• Underload
Red LED: off Green LED: blinking
ABNORMAL CONDITION
ABNORMAL CONDITION:
• ACS 400 cannot fully follow control
commands.
• Blinking lasts 15 seconds.
Red LED: on Green LED: on
FAULT
ACTION:
• Give a stop signal to reset fault.
• Give a start signal to restart the drive.
NOTE:
• If the drive fails to start, check that the
input voltage is within the tolerance
range.
FAULT
ACTION:
• Turn the power off.
• Wait for the LEDs to turn off.
• Turn the power back on.
Caution! This action may start the drive.
ACS 400 User's Manual