BUSCH COBRA NC 0300 B, Instructions Manual

Page: 40 / 44

8 | Troubleshooting
40 | 44 Pump Control Instructions INVEOR VFD R5 COBRA_EN_en
No.
Error name Description of error Possible causes/remedy
17 Start-up error Motor not starting up or
starting up incorrectly. 5.082 Check motor connections/check
motor and controller
parameters; if necessary,
disable error (5.082)
18 Excess temperature for
frequency converter
application
Inner temperature too high Insufficient cooling, low motor
speed and high torque,
switching frequency too high
21 Bus time-out No response from bus sharing
unit or remote control/PC Check bus wiring
22 Acknowledgement error The number of maximum
automatic acknowledgements
(1.182) was exceeded
Check error history and remedy
error
23 External fault 1 The parameterised fault input is
active. 5.010 Correct the external fault
24 External fault 2 The parameterised fault input is
active. 5.011 Correct the external fault
25 Motor detection Motor identification error Check variable speed drive/
motor and PC / remote control /
variable speed drive
connections / restart motor
identification
26 STO inputs plausibility The statuses of the two STO
inputs have not been identical
for more than 2 sec. Incorrect activation of the STO
inputs
Check corresponding external
wiring
32 Trip IGBT Protection of the IGBT module
against overcurrent has been
triggered Short circuit in the motor or
motor feed line / controller
settings
33 Overvoltage of
intermediate circuit
The maximum intermediate
circuit voltage has been
exceeded Feedback by motor in generator
mode / mains voltage too high /
faulty setting for rotation speed
controller / brake resistor not
connected or defective / ramp
times too short
34 Undervoltage of
intermediate circuit
The minimum intermediate
circuit voltage has not been
reached Mains voltage too low, mains
connection defective / check
wiring
35 Excess motor
temperature
Motor PTC has been triggered Overload of the motor (e.g. high
torque at low motor speed) /
ambient temperature too high
36 Power failure The grid voltage has dropped
briefly Grid fluctuation / grid voltage
interrupted
38 Excess IGBT module
temperature
Excess IGBT module
temperature Insufficient cooling, low motor
speed and high torque,
switching frequency too high
39 Overcurrent Maximum output current of
variable speed drive exceeded Motor stalled / check motor
connection / incorrect speed
controller setting / check motor
parameters / ramp times too
short / brake not open