Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
509
Maintenance and servicing
This chapter provides information on the following:
● Maintenance and servicing procedures that have to be carried out on a regular basis to
ensure the availability of the devices.
● Exchanging device components when the unit is serviced
● Forming the DC link capacitors
● Upgrading the device firmware
Danger to life if the fundamental safety instructions and remaining risks are not carefully
observed
The non-observance of the fundamental safety instructions and residual risks stated in
Chapter 1 can result in accidents with severe injuries or death.
• Adhere to the fundamental safety instructions.
• When assessing the risk, take into account residual risks.
Danger to life through electric shock due to the residual charge of the DC link capacitors
Because of the DC link capacitors, a hazardous voltage is present for up to five minutes
after the power supply has been switched off.
Contact with live parts can result in death or serious injury.
• Only open the device after five minutes have elapsed.
• Measure the voltage before starting work on the DCP and DCN DC link terminals.
The chassis unit comprises mostly electronic components. Apart from the fan(s), the unit,
therefore, contains hardly any components that are subject to wear or that require
maintenance or servicing. The purpose of maintenance is to preserve the specified condition
of the chassis unit. Dirt and contamination must be removed regularly and parts subject to
wear replaced.
The following points must generally be observed.
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