Lenze E84AVSCx 8400 StateLine C - Manual (Page 50)

7 Diagnostics & troubleshooting
7.5 Error messages
50
Lenze · 8400 StateLine · Operating instructions · from Firmware V06.00 · DMS 1.2 EN · 12/2012 · TD05
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OC2: Power section - earth fault 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:
Deactivate earth fault detection during
operation by setting the filter time
(C01770) to 250 ms.
• If shielded motor cables longer than
50 m are used: Increase the filter time
for earth fault detection during
operation (C01770).
OC5: Ixt overload The Ixt overload check has tripped.
• Operating threshold = 100 % Ixt
(adjustable in C00123)
Possible causes:
• Wrong dimensioning of the device with
regard to its motor load.
• Load cycles are not complied with.
• Check and, if required, correct
dimensioning of the device and the
motor load with regard to technical
data.
• Reduce motor load cycles (observe load
cycles according to documentation).
OC6: I2xt motor overload Thermal overload of the motor. • Observe load requirements.
• Correct dimensioning if necessary.
• In case of VFCplus operation: Check
Vmin boost (C00016).
OC7: Motor overcurrent The maximum current monitoring has
tripped.
• The instantaneous value of the motor
current has exceeded the limit value
set in C00939.
Check and, if required, correct
dimensioning of the load with regard to
the installed device power.
OC10: Max. current reached The device displays that the maximum
current has been reached.
• Check and, if required, correct
dimensioning of the load with regard
to the installed device power.
• Check the maximum current settings
in C00022 (Imax in motor mode) and
C00023 (Imax in generator mode).
OC11: Active clamp operation The device indicates that the "CLAMP"
overcurrent limitation has been activated.
• A permanent clamp operation causes
an overload disconnection.
Reduce setpoint generation dynamics or
motor load.
OC12: I2xt overload - brake resistor Too frequent and too long braking
processes.
Check drive dimensioning.
OC13: Max. current for Fch exceeded The device has detected a motor current
which exceeds the maximum current limit
at permanent switching frequency of the
inverter.
• If a permanent switching frequency
inverter is set, a certain limit arises for
the maximum current, depending on
the setting. If this current limit is
exceeded due to a load impulse or
overload, an error message is
displayed.
• Observe the maximum current setting
depending on the set switching
frequency of the inverter.
• Reduce the required load or setting of
the dynamic switching frequency if
necessary.
Error message Cause Remedies