Siemens SINAMICS G120 CU230P-2, Operating Instructions Manual, Page: 302 / 346

Alarms, faults and system messages
9.4 List of alarms and faults
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
300
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
Number Cause Remedy
A07910 Motor overtemperature Check the motor load.
Check the motor's ambient temperature.
Check the KTY84 sensor.
Check the overtemperatures of the thermal model (p0626 ... p0628).
A07920 Torque/speed too low
A07921 Torque/speed too high
A07922 Torque/speed out of tolerance
The torque deviates from the torque/speed envelope curve.
• Check the connection between the motor and the load.
•
Adapt the parameterization corresponding to the load.
F07923 Torque/speed too low
F07924 Torque/speed too high
•
Check the connection between the motor and the load.
• Adapt the parameterization corresponding to the load.
A07927 DC braking active Not required
A07980 Rotary measurement activated Not required
A07981 No enabling for rotary
measurement
Acknowledge pending faults.
Establish missing enables (see r00002, r0046).
A07991 Motor data identification activated Switch on the motor and identify the motor data.
F30001 Overcurrent Check the following:
•
Motor data, if required, carry out commissioning
• Motor connection method (Υ / Δ)
•
U/f operation: Assignment of rated currents of motor and Power
Module
• Line quality
•
Make sure that the line commutating reactor is connected properly
• Power cable connections
•
Power cables for short-circuit or ground fault
• Power cable length
•
Line phases
If this doesn't help:
• U/f operation: Increase the acceleration ramp
•
Reduce the load
• Replace the power unit
F30002 DC-link voltage overvoltage Increase the ramp-down time (p1121).
Set the rounding times (p1130, p1136).
Activate the DC link voltage controller (p1240, p1280).
Check the line voltage (p0210).
Check the line phases.
F30003 DC-link voltage undervoltage Check the line voltage (p0210).
F30004 Converter overtemperature Check whether the converter fan is running.
Check whether the ambient temperature is in the permissible range.
Check whether the motor is overloaded.
Reduce the pulse frequency.