Siemens G120P Manual page 51

Number Cause
F07426 Technology controller actual value
limited
F07801 Motor overcurrent
F07806 Regenerative power limit exceeded
F07807 Short circuit detected
F07860 External fault 1...3
F07861
F07862
F07900 Motor blocked
F07901 Motor overspeed
F07902 Motor stalled
A07920 Torque/speed too low
F07923
A07921 Torque/speed too high
F07924
A07929 No motor detected
A07994 Motor data identification not carried
out
F30001 Power unit: Overcurrent
Siemens AG
Solution
Check that the motor is correctly connected.

The actual value for the technology controller which is interconnected via connector
input p2264 has reached a limit.
 Adjust the limits to the signal level (p2267, p2268).
Check the actual value (p2264).

The permissible motor limit current has been exceeded.
Check the current limits (p0640).

Vector control: Check the settings for the current controller (p1715, p1717).

V/f control: Check the settings for the current limiting controller (p1340...p1346).

 Increase the up ramp (p1120) or reduce the load.
 Check the motor and the motor cables for short-circuits or ground faults.
Check the motor for star-delta connection and rating plate parameterization.

Check the combination of the power unit and motor.

Select the flying restart function (p1200) if switched to rotating motor.

 Increase the down ramp.
Reduce the driving load.

Use a power unit with a higher regenerative feedback capability.

For vector controls, the regenerative power limit in p1531 can be reduced until

the fault is no longer activated.
Check the drive connection on the motor side for any phase-to-phase short-

circuit.
Ensure that no line and motor cables have been accidently mixed up.

The drive receives an alarm from an external source. Rectify the causes of this

fault.
Check that the motor can run freely.

Check the torque limits (r1538 and r1539).

Check the parameters of the "Motor blocked" message (p2175, p2177).

Activate precontrol of the speed limiting controller (p1401 bit 7 = 1).

Increase the hysteresis for the overspeed signal (p2162).

Check whether the motor data has been set correctly and perform a motor

identification.
Check the current limits (p0640, r0067, r0289). If the current limits are too low,

the drive cannot be magnetized.
Check whether motor cables are disconnected during operation.

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 magnitude of the current following enabling of the drive pulses is so small that
no motor is detected.
Check the motor cables, contactors and switches.

Reduce the threshold value (p2179, e.g. with synchronous motors)

 Check the voltage boost of the V/f control (p1310)
 Carry out a measurement at standstill in order to set the stator resistance
(p0350).
The "Vector control" mode is set but motor data identification has not yet been
carried out.
Carry out motor data identification (see p1900).

Set the parameters for the "V/f control" (p1300 < 20).

Check the following settings and components:
Fault rectification
6
Alarms and faults
51
CM2G5111en
2014-05-16