Lenze EVF9338−EV - Manual (Page 37)

Troubleshooting and fault elimination
System error messages
General error messages
4
l
37 EDKVF93−04 EN 2.0
Remedy Cause Error Error number
x = 0: TRIP
x = 1: Message
x = 2: Warning
Display
The drive is connected to the coasting
machine. The coasting is caused by a
short−time pulse inhibit, e.g. at
l OU (overvoltage in the DC bus)
l external or internal controller inhibit
l Activate flying restart circuit
l Operate with speed feedback in the
vector control operating mode
l Encoder error
l Tracks for encoder feedback of the
motor speed are reversed
l Check wiring of the encoder
l In case of drive problems with
activated feedback, the feedback can
be analysed. Here, the signal of the
feedback is not used for control. For
this test the function block DFIN
must be entered into the processing
table. In the Lenze setting, DFIN is
entered at position 1 of the
processing table (C0465/1 = 200).
– Deactivate feedback with
C0025 = 1
– Connect feedback at the digital
frequency input DFIN (X9)
– Set DFIN constant (C0425) to the
number of increments of the
encoder
– In C0426, the speed detected by
the encoder is indicated
DC−injection braking at high speeds l See ^ 31
OC2 x012 Earth fault One of the motor phases has earth
contact l Check motor
l Check supply cables
Excessive capacitive charging current of
the motor cable Use motor cable which is shorter or of
lower capacitance
OC3 x013 Overload during
acceleration Acceleration/deceleration times too
short in proportion to the load (C0012,
C0013, C0105) l Increase the gain (P component) of
the current controller (C0075)
l Reduce integral−action time (integral
action component) of the I
max
controller (C0076)
l Increase ramp times
l ^ 32, "controller in clamp operation
(fault OC3)"
OC5 x015 I × t overload The utilisation of the controller exceeds
100 % (C0064 > 100 %) Check drive dimensioning
l The utilisation of the controller is
calculated from the mean value of
the motor current over a time of
180 s. When operating with rated
power (150 % overload capacity), the
controller can be operated at a
utilisation of up to 100 %.
l When C0064 = 95 %, the warning is
cancelled.
The utilisation of the controller exceeds
110 % (C0064 > 110 %)
l The maximum current is reduced
Check drive dimensioning
l When C0064 = 95 %, the reduction of
the maximum current is cancelled.
The warning is cancelled.
l NOTE: Operation at increased rated
power (120 % overload capacity) is
not possible.
Reversed motor phases when operating
with feedback or reversed encoder
tracks so that the direction of rotation
has changed l Check the motor cable connection for
correct phase relation
l If possible, operate the motor with
deactivated feedback (C0025 = 1)
and check the direction of rotation of
the motor.
l See also ^ 31