Siemens G120P Manual page 49

Number Cause
A07400 DC-link voltage maximum controller
(VDC_max controller) active
A07409 V/f control, current limiting controller
active
A07805 Drive: Power unit overload I2t
A07850 External alarm 1 ... 3
A07851
A07852
A07903 Motor speed deviation
A07910 Motor overtemperature
A07920 Torque/speed too low
F07923
A07921 Torque/speed too high
F07924
A07922 Torque/speed out of tolerance
A07927 DC braking active
A07980 Rotary measurement activated
A07981 Rotating measurement: No enable
signals
A07991 Motor data identification activated
A30049 Internal fan defective
A30502 DC link overvoltage
A30920 Temperature sensor fault
Number Cause
F01000 Software fault in CU
F01001 FloatingPoint exception
F01015 Software fault in CU
F01018 Power-up aborted more than once
Siemens AG
Solution
If intervention by the controller is not desirable:
Increase the ramp-down times.

 Deactivate the VDC_max controller (p1240 = 0 for vector control, p1280 = 0 for
V/f control).
The alarm is automatically canceled after one of the following measures:
Increase the current limit (p0640).

Reduce the load.

 Reduce the up ramps for the setpoint speed.
Reduce the continuous load.

Adapt the duty cycle.

Check the assignment of rated currents of motor and power unit.

Parameters p2112, p2116 and p2117 determine the signal sources for the external
alarm 1... 3.
The drive receives an alarm from an external source. Rectify the cause of this

alarm.
Increase p2163 or p2166.

Increase the torque, current and power limits.

 Check the motor load.
 Check the ambient temperature and the motor ventilation.
Check the KTY84 sensor.

Check the overtemperatures of the thermal model (p0626 ... p0628).

The torque deviates from the torque/speed envelope curve.
Check the connection between the motor and load.

Adjust the settings according to the load.

The alarm disappears after DC braking.
The alarm disappears after optimization of the speed controller.
Acknowledge pending faults.

Create enable signals which are missing.

The alarm disappears after motor data identification.
 Check the internal fan and replace it, if necessary.
Check the device supply voltage (p0210).

Check the dimensions of the line reactor.

 Check that the sensor is correctly connected.
Faults
Solution
 Replace the CU.
Switch the CU off and on again.

Update the firmware

Contact Technical Support.

Replace the CU.

1. Switch the module off and on again.
2. After this fault has been output, the module is booted with the factory settings.
Fault rectification
6
Alarms and faults
49
CM2G5111en
2014-05-16