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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".
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".
INVERT TIME
This message will flash when the inverter ETR value has reached 98%.
The inverter ETR 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 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 peak current rating. In addition, the "Overcurrent" LED
(D8) on the interface board will flicker. During this time the control card
is attempting to initiate current limit. If the current rises to fast or the
control card cannot control the condition by means of current limit, the
unit will trip on "Over Current".
WARNING MESSAGES