Service, maintenance and fault rectification
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8.2.2 Fan maintenance
The average service life of fans is 40 000 hours. In practice, the service life may
differ from this value, in particular in dusty environments.
The fan must be replaced in good time in order to ensure that the drive remains
ready for operation.
Information about replacing the fan can be found in the following manuals:
A5E02923635A AB Hardware Installation Manual Power Module PM230 IP55/UL Type 12
A5E03448282B AA Hardware Installation Manual Power Module PM230 IP20
The fans are available as spare parts through your local Siemens branch office.
8.3 Fault rectification
The variable speed drive uses the following means to display faults and operating
states:
● The LEDs on the front indicate the most important operating states.
● The drive displays alarms and faults via the fieldbus, the terminal strip, a
connected operator panel, or via the STARTER software.
Every alarm and fault has a unique number. Using the numbers listed in the table
in Chapter Fault table (SW) [➙ 81], you can identify the cause of the fault and
rectify the problem.
8.3.1 Displayed operating states
The Control Unit has two LEDs which indicate the operating state of the drive:
● LED RDY = Ready
● LED BF = Bus Fault
The LED RDY (Ready) lights up orange temporarily after the power supply voltage
is switched on. As soon as the color of the LED RDY changes to red or green, the
LED signals the state of the variable speed drive.
In addition to the signal states "On" and "Off" there are two different flashing
frequencies:
Figure 27: Flashing frequency
1
Slow flashing
2
Rapid flashing
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