Danfoss VLT Series Service Manual page 11

ALARM MESSAGES
ALARM
TRIP0LOCK000000
INVERTER0FAULT00
+
Menu
–
Data
Alarm On
Fwd
Jog
Rev
Stop
Start
Reset
Alarm messages will be indicated by the following messages appearing in the
display and the red Alarm LED will flash on the unit keypad. All alarm messages
result in the unit's operation being interrupted and require a Manual or Automatic
reset. Automatic reset can be selected in parameters 309 and 312. In addition,
the message "Trip" or "Trip Locked" will be displayed. If "Trip Locked" is displayed,
the only possible reset is to cycle power and then perform a manual reset. Manual
reset is accomplished by means of the front panel push button or by a remote
contact closure on the appropriate control terminal. Remedies listed with each
alarm message give a basic description of the corrective action which can be
taken to correct the fault condition. For a more detailed explanation, see the
Symptom/Cause Section and the Application Section. Also note the numbers in
parenthesis by each alarm message. These are the codes which will appear in the
Fault memory, parameter 602.
INVERTER FAULT (1)
This message indicates a fault in the power section of the unit. This fault returns
a "Trip Locked". Also see Testing The Inverter Section.
OVER VOLTAGE (2)
This message indicates the DC Bus voltage upper limit has been exceeded. This
fault can be caused by high line voltage or regenerative energy being returned
from the motor. To remedy this fault condition, reduce the line voltage or extend
the Decel Ramp. This fault returns a "Trip". Also see Over Voltage Trips.
UNDER VOLTAGE (3)
This message indicates the DC bus voltage has fallen below the lower limit. To
remedy this fault, increase the line voltage to the correct value for the unit rating.
This fault returns a "Trip". Also see Testing the Soft Charge Circuit.
OVER CURRENT (4)
This message indicates a short circuit on the output of the inverter. This fault may
also be caused by the unit reaching it's peak current rating so rapidly that the unit
can not respond with current limit. An example may be running the drive at speed
and closing an output contactor connecting the drive to a high inertia load. To
remedy this fault, check the output wiring and motor for short circuits. This fault
returns a "Trip Locked". Also see Over Current Trips.
Section Two
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