Lenze 8400 StateLine - Manual (Page 442)

9 Diagnostics & error management
9.7 Maloperation of the drive
442
Lenze · 8400 StateLine · Reference manual · DMS 12.0 EN · 06/2014 · TD05/TD14
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An asynchronous
motor with feedback
rotates without
control and with too
low speed
Motor phases have been interchanged
• Thus the rotating field of the motor is not
identical anymore with the rotating field
of the feedback system.
• Therefore, the drive shows the following
behaviour if V/f characteristic control
( C00006 = 7) is performed:
• The motor rotates faster than the speed
setpoint by the value set in C00074 .
• After the controller has been enabled,
the controller will not stop if the speed
setpoint = 0 or a quick stop (QSP)
occurs.
• Among other things, the final motor
current depends on the value set for the
V
min
boost and may rise up to I
max
which can trigger the "oC5: Ixt
overload" fault message.
Check the phase position of the motor cable
If possible: Actuate the motor with
deactivated feedback ( C00006 = 6) and check
direction of rotation of the motor
Motor phase (LP1)
monitoring does not
respond if the motor
phases are
interrupted
Monitoring is not active ( C00597 = 0) Activate monitoring ( C00597 = 1)
Maloperation Cause Remedy