Section Two - Danfoss VLT Series Service Manual

FAULT INDICATORS
AND MESSAGES
STATUS MESSAGES
100.0%
REFERENCE.000000
CURRENT0LIM..000
A variety of messages are displayed by the control card. Some messages indicate
the operational status of the unit while others provide warnings of an impending
fault. In addition, there are the alarm messages which indicate that the unit's
operation has stopped due to a fault condition. In this section we will deal with
only those messages which interrupt the unit's operation. A complete list of
status messages can be found in the Instruction Manual. The particular type of
status, warning, or alarm message will be indicated on the bottom line of the
display.
CURRENT LIMIT
This message will flash in the display when the unit is operating above the current
limit setting as recorded in parameter 209. Parameter 310 may be set to provide
a fixed time delay after which the unit will trip.
REF FAULT
This message will flash in the display should any live zero signal be operating
outside of its range. For example, 4-20mA has been selected as the speed
reference. Should the current loop be broken, the display will flash "REF FAULT".
Parameters 414 and 415 may be used to select the unit's response to this
condition.
NO 24 VOLT
This message will flash if the 24 volt power supply is missing or out of tolerance.
The 24 volt supply is used only for the customer's remote connections.
NO MOTOR
This message will flash if Motor Check has been activated in parameter 313,
terminal 27 is enabled and no motor is detected.

Section Two

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