Error Messages And Their Cause; Under Voltage; Over Voltage; Over Current - KEB COMBIVERT F5 Instruction Manual

Error Messages
6.3 Error Messages and Their Cause
Display
Under voltage
Over voltage
Over current

Overload

Low speed
overload
Cool down
phase
completed
120
Description
The DC bus voltage drops below
the permissible value, the
input is single phasing, or
there is a phase imbalance of
greater than 2%.
The DC bus voltage rises above
the permissible value either
during motor regenerative
operation or as a result of line
side voltage spikes.
Occurs when the specified peak
output current is exceeded or
if there is a ground fault.
Time dependent overload. See
overload curves on page 21.
Error can not be rest until dis-
play shows E.nOL!
Time dependent overload at low
speed. See overload curve on
page 28.
Error can not be rest until dis-
play shows E.nOL!
The drive has cooled down after
an E.OL or E.OL2 error.
Cause and Solution
• Input voltage is too low or unstable
• Input wiring is wrong
• Isolation transformer is too small
• Isolation transformer is not connected correctly
• One phase of the input line is missing
• Phase imbalance greater than 2%
• Input voltage is too high – install a step down
transformer
• Voltages spikes on the line – install 5% line
choke
• Braking resistor is not connected or has a
broken connection or the resistance is too high
– verify braking resistor resistance
• Inverter is poorly grounded
• Short circuit on the motor leads
• Ground fault on the motor leads – verify motor
wiring
• Contacts on motor contactor are damaged or
burned causing arcing - check and replace
• Inverter poorly grounded
• Incorrect motor data – verify data LF10-LF1
• Shorted output transistor
• Motor wired for incorrectly
• Motor data is wrong, specifically motor current
• The inverter is sized too small
• High mechanical load (friction) on gear,
guides, or rails... etc
• Stand still current of the motor is too high – re-
duce the switching frequency of the inverter to
8kHz (LF.38 = 0) see also US.16.
• Motor data is not adjusted properly
• Inverter sized too small
• High mechanical load (friction) on gear,
guides, rails...etc
• Motor wired incorrectly
• The errors E.OL and E.OL2 can only be reset
after E.noL is displayed