Siemens G120P Technical Manual page 82

Service, maintenance and fault rectification
8
Fault rectification
82 | 98
Siemens
Building Technologies
Number Cause
A01910 Setpoint timeout: p2040 ≠ 0
ms and one of the following
F01910
causes:
● The bus connection is
interrupted
● The MODBUS master
is switched off
● Communications error
(CRC, parity bit, logical
error)
A01920 PROFIBUS: Cyclic
connection interrupt
A03520 Temperature sensor fault
A05000 Power Module
overtemperature
A05001
A05002
A05004
A05006
A07012 I2t Motor Module
overtemperature
A07015 Motor temperature sensor
alarm
A07321 Automatic restart active
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
Solution
1. Establish the bus connection and switch on the
communication partners.
2. Possibly adapt p2040.
3. Set the PROFIBUS master to RUN.
The cyclic connection to the PROFIBUS master is
interrupted.
Establish the PROFIBUS connection and activate the

PROFIBUS master with cyclic operation.
Check that the sensor is correctly connected.

1. Check that the ambient temperature is within the
defined limit values.
2. Check that the load conditions and duty cycle are
appropriately dimensioned.
3. Check whether there has been a cooling system
failure.
1. Reduce the motor load.
2. Check the ambient temperature and the motor
ventilation.
3. Check the thermal time constant p0611.
4. Check the overtemperature fault threshold p0605.
1. Check that the sensor is correctly connected.
2. Check the parameter assignment (p0601).
Automatic restart is active. During voltage recovery or
when remedying the causes of pending faults, the drive is
automatically switched back on.
1. Block the automatic restart (p1210 = 0).
2. Abort the restart process by removing the switch-on
command (p8040).
If intervention by the controller is not desirable:
1. Increase the ramp-down times.
2. 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:
1. Increase the current limit (p0640).
2. Reduce the load.
3. Reduce the up ramps for the setpoint speed.
1. Reduce the continuous load.
2. Adapt the duty cycle.
3. 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 variable speed drive receives an alarm from an

external source. Rectify the cause of this alarm.
1. Increase p2163 or p2166.
2. Increase the torque, current and power limits.
1. Check the motor load.
2. Check the ambient temperature and the motor
ventilation.
3. Check the KTY84 / Pt 1000 sensor.
4. Check the overtemperatures of the thermal model
(p0626 ... p0628).
A5E36496664A_d
2016-03-17