Lenze 8400 - Manual (Page 578)

9 Diagnostics & error management
9.8 Maloperation of the drive
578
Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
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Motor consumes too
much current
V
min
boost has been selected too high Correct setting with C00016
V/f base frequency has been selected too low Correct setting with C00015
Rated motor data (stator resistance, speed,
current, frequency, voltage) and cos ϕ
and/or magnetising inductance is not
adapted to the motor data
Execute automatic motor parameter
identification with the C00002/23 device
command
- or -
Adjust motor parameters manually:
C00084 : Motor stator resistance
C00087 : Rated motor speed
C00088 : Rated motor current
C00089 : Rated motor frequency
C00090 : Rated motor voltage
C00091 : Motor cosine phi
C00092 : Motor magnetising inductance
Motor parameter
identification is
aborted with error
LP1
Motor is too small compared to the rated
device power (>1 : 3)
Use device with lower rated power
DC injection brake (DCB) is active via
terminal
Deactivate DC injection brake
Drive behaviour with
vector control is not
satisfactory
different Optimise or manually adapt vector control
Execute automatic motor parameter
identification with the C00002/23 device
command
Torque dip in field
weakening range
or
motor stalling when
being operated in the
field weakening
range
Motor is overloaded Check motor load
Motor windings are wired incorrectly Reverse from star connection to delta
connection
V/f reference point is set too high Correct setting with C00015
Override point of field weakening is set too
low
Correct setting with C00080
Mains voltage too low Increase mains voltage
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