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Fault rectification
6
Hardware diagnostics
Check/Test
Description
Fan
10 V
24 V
6.4.3
Check/Test
Description
MANUAL
1.
Monitor the motor output terminals using a suitable multimeter which is also capable of
operation
measuring PWM voltages.
2.
Use an IOP and select "Manual" mode via the appropriate button.
3.
Stop the drive with the I and O buttons.
4.
Start the drive.
5.
Once the test has been completed, reset the operating mode to "Auto".
You can change the output voltage or the speed with the button on the IOP. "Backwards" can be
enabled using the "Control" menu on the IOP.
AUTO mode
1.
Monitor the motor output terminals using a suitable multimeter which is also capable of
measuring PWM voltages.
2.
Ask a competent operator to isolate the drive.
3.
Ensure that all stop/start functions, etc. are working properly.
The output voltage rises in accordance with the requested higher speed until a maximum close to
the line voltage is reached unless this value is limited by the system settings. All three phases
should exhibit a similar value.
56
Siemens AG
Check the incoming supply. If you can hear the sounds of the fan, the incoming
supply is okay.
Check the incoming supply between terminals T35 and T36. 10 V are okay.
Check the incoming supply between terminals T9 and T28. 24 V are okay.
Procedure
 If all the tests have been passed apart from the fan test:
Replace the fan as indicated in the Hardware Installation Manual.
 If the fans are not working and the DC bus monitor shows 0, the power unit
may possibly be defective. The monitored DC bus signals indicate that the
microcontroller system for the drive is working properly. A problem in the
supply voltage could be the result of incorrect wiring by the customer. If the
problem persists:
Remove the wiring and check it once again.
 If the problem persists and the fan and the DC monitor are working properly,
the cause of the problem may reside in the control unit.
Check the control unit.
NOTICE
Be aware that the defect may cause damage to both parts of the drive.

Function test

Perform the preliminary tests set out in the table below without the motor
connected.
IOP diagnostics
Test the wiring carried out by the customer via the following checks. Ensure that
the correct signals reach the drive.
OK
OK
CM2G5111en
2014-05-16

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