7-4 Trips & Fault Finding
AC30 series Variable Speed Inverter
External dynamic brake resistor has been overloaded:
• Trying to decelerate a large inertia too quickly or too often
The power calculation for the
external resistor has exceeded
one half of the Brake Overrating
allowance.
Internal dynamic braking switch has been overloaded:
• Trying to decelerate a large inertia too quickly or too often
The power calculation for the
internal dynamic braking switch
has exceeded one half of the its
overrating allowance.
Keypad has been disconnected from drive whilst drive is running in Local Control:
•
GKP accidentally disconnected from drive
Lost option communications:
• A break in option communications has been detected. Refer to option
Not applicable.
DC Link failed to reach the undervoltage trip level within the contactor feedback time.
• The Line contactor failed to connect.
•
Missing 3-phase line supply
Not applicable.
•
Indicates a missing input phase, for Frame K, L and M drives. Disable this trip for
DC fed units.
Not applicable.
The DC link ripple voltage is too high:
• Check for a missing input phase
•
Repetitive start / stop or forward reverse action.
The dc link ripple has exceeded
75% of the trip level.
BREAK
Lost Base Modbus communications:
• A break in the Base Modbus communications has been detected. Refer to
Not applicable.
24V rail is low
•
Output overload due to excess current being drawn from the 24v terminal.
Not applicable.
ERROR
Only for PMAC motor : When using the Start feature in Sensorless Vector Control, the
real speed hasn’t reached the speed setpoint after 5 seconds to move from open to
closed loop control or to move from closed to open loop
Not applicable.
Overspeed:
•
>150% base speed when in Sensorless Vector mode
Not applicable.
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