Message, Lu: undervoltage in the dc bus, Lu: dc bus undervoltage – Lenze 8400 StateLine User Manual
Page 456: Xx.0123.00015, Xx.0123.00016, Xx.0123.00017, 9diagnostics & error management
9
Diagnostics & error management
9.9
Error messages of the operating system
456
Lenze · 8400 StateLine · Reference manual · DMS 12.0 EN · 06/2014 · TD05/TD14
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LU: DC bus undervoltage [xx.0123.00015]
oC1: Power section - short circuit [xx.0123.00016]
oC2: Power section - earth fault [xx.0123.00017]
Response (Lenze setting printed in bold)
Setting:
( Adjustable response)
0: No Reaction 1: Fault 2: Trouble 3: TroubleQuickStop 4: WarningLocked 5: Warning 6: Information
Cause
Remedy
The device has detected a DC bus undervoltage. The
inverter control is switched off because the drive
properties of the motor control cannot be provided
anymore due to the DC bus undervoltage.
• Depending on the configuration of the auto-start lock
function, set
so that, when this error is
tripped, the controller only restarts after the
controller inhibit has been switched.
• Switch on mains supply or ensure sufficient supply via
DC bus.
• Adjust setting in
if required.
Response (Lenze setting printed in bold)
0: No Reaction 1: Fault 2: Trouble 3: TroubleQuickStop 4: WarningLocked 5: Warning 6: Information
Cause
Remedy
The device has recognised a short circuit of the motor
phases. To protect the device electronics, the inverter
control is switched off.
• Mostly, incorrectly executed motor connections are
the cause.
• If the device is inappropriately dimensioned with
regard to the motor load and the current limitation in
the controller (Imax controller) is set incorrectly, this
error message may also occur.
Motor control: Defining current limits
• Check motor connections and the corresponding plug
connector on the device.
• Only use permissible combinations of device power
and motor power.
• Do not set the dynamics of the current limitation
controller too high.
Response (Lenze setting printed in bold)
0: No Reaction 1: Fault 2: Trouble 3: TroubleQuickStop 4: WarningLocked 5: Warning 6: Information
Cause
Remedy
The device has recognised an earth fault at one of the
motor phases. To protect the device electronics, the
inverter control is switched off.
• Mostly, incorrectly executed motor connections are
the cause.
• If motor filter, motor cable length, and cable type
(shielding capacity) are dimensioned incorrectly, this
error message may occur due to leakage currents to
PE.
• If motor filters with additional terminals for +UG and
–UG and devices greater or equal 3 kW are used, the
earth fault detection may be triggered due to leakage
currents to +UG and –UG.
• A cause can also be the use of shielded motor cables
longer than 50 m.
• Check motor connections and the corresponding plug
connector on the device.
• Use motor filters, cable lengths, and cable types
recommended by Lenze.
• If motor filters with additional terminals for +UG and
–UG and devices greater or equal 3 kW are used:
•
up to version V05.00.00:
Set resp. to earth fault
) to "0: No Reaction".
•
From version V05.01.00 onwards:
Deactivate earth-
fault detection during operation by setting the
filter time (
) to 250 ms.
• If motor cables longer than 50 m are used:
•
From version V05.01.00 onwards:
Increase filter
time for earth-fault detection during operation