Danfoss VLT Series Service Manual page 10

Section Two
WARNING MESSAGES
100.0%
REFERENCE.000000
VOLTAGE0LOW.000.
2 - 2
VOLTAGE LOW
This message will flash when the DC Bus voltage has fallen below the lower limit.
This is an indication of low line voltage. This is only a warning message, however.
If the condition persists, it will result in a unit trip on "Under Voltage".
* Refer to table for specific value.
VOLTAGE HIGH
This message will flash when the DC Bus voltage has exceeded the upper limit.
This is an indication of high line voltage or regenerative energy being returned to
the bus. This is only a warning message, however, if the condition persists, it will
result in a unit trip on "Over Voltage".
* Refer to table for specific value.
INVERT TIME
This message will flash when the inverter ETR value has reached 98%. The inverter
ETR (Electronic Thermal Relay) begins counting up as soon as the output current
exceeds 105% of the unit's continuous current rating. At an inverter ETR value of
100%, the unit trips on "Invert Time".
MOTOR TIME
This message will flash if Motor Thermal Protection has been activated in parameter
315, "Warning" has been selected as the Data Value, and the Motor ETR value
has reached 98%. The Motor ETR value begins counting up if the motor is run at
slow speed or if the motor is consuming more than 116% of the motor's nominal
rated current as entered in parameter 107. At a Motor ETR value of 100%, the
unit will respond based on the setting in parameter 315. If Trip has been selected,
the unit will trip on "Motor Time".
OVERCURRENT
This message indicates at least one of the three output phases has reached the
unit's peak current rating. During this time the control card attempts to initiate
current limit. If the current rises too fast or the control card cannot control the
condition by means of current limit, the unit will trip on "Over Current".
* DC BUS VOLTAGE LIMITS
VLT Rating
SMPS stop
SMPS start
Undervoltage trip, inverter stopped
inverter enabled
Control Card undervoltage warning
Control Card overvoltage warning
(brake applied*, parameter 300)
Overvoltage trip, inverter stopped
inverter enabled
* Only on VLT Series 3000 units.
VLT 3002-3052
VLT 3502-3562
230VAC 380VAC 460VAC
190 360
210 410
210 400
230 430
235 440
370 665
(395) (705) (845)
410 730
380 680
360
410
460
500
510
800
880
820