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7-1
Trips and Fault Finding
T
RIPS AND
1
Trips
Trip Warning Message
What Happens when a Trip Occurs
Resetting a Trip Condition
Using the Keypad to Manage Trips
F
F
AULT
The trip display message is flashed repeatedly on the screen to warn of an imminent trip. Some
trip conditions need time to take effect. The warning can allow you time to rectify the situation.
The message will clear when you use the Keypad, but after a short time will reappear until the
problem is resolved, or the drive trips.
When a trip occurs, the drive's power stage is immediately disabled causing the motor and load
to coast to a stop. The trip is latched until action is taken to reset it. This ensures that trips due to
transient conditions are captured and the drive is disabled, even when the original cause of the
trip is no longer present.
Keypad Indications
If a trip condition is detected the activated alarm is displayed on the MMI display.
All trips must be reset before the drive can be re-enabled. A trip can only be reset once the trip
condition is no longer active, i.e. a trip due to a heatsink over-temperature will not reset until the
temperature is below the trip level.
You can reset the trip as follows:
1. Press the
(STOP) key to reset the trip and clear the alarm from the display.
2. Remove and then re-apply the RUN command and the drive will run normally.
Success is indicated by either
Trip Messages
If the drive trips, then the display immediately shows a message indicating the reason for the
trip. The possible trip messages are given in the table below.
ID
Trip Name
1
OVERVOLTAGE
2
UNDERVOLTAGE
INDING
or the Local Setpoint being displayed.
Possible Reason for Trip
The drive internal dc link voltage is too high:
The supply voltage is too high
Trying to decelerate a large inertia load too quickly;
DECEL TIME time too short
The brake resistor is open circuit
DC link low trip:
Supply is too low/power down
650 Series AC Drive
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