Maintenance and servicing
11.4 Replacing components
Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
543
The average service life of the device fans is 50,000 hours. In practice, however, the service
life depends on other variables (e.g. ambient temperature, degree of cabinet protection, etc.)
and, therefore, may deviate from this value.
The fans must be replaced in good time to ensure that the built-in unit is available.
● Disconnect the built-in unit from the power supply.
● Allow unimpeded access.
● Remove the protective cover.
The removal steps are numbered in accordance with the numbers in the diagram.
1. Remove the retaining screws for the fan (3 screws)
2. Disconnect the supply cables (1 x "L", 1 x "N")
You can now carefully remove the fan.
Damage to the device if signal cables are damaged when removing
Signal cables can be damaged when the fan is removed. This can cause the device to fail.
• When removing the fan, ensure that you do not damage any signal cables.
To reinstall, perform the above steps in the reverse order.
Note
Pay attention to the tightening torques
The tightening torques specified in the table "Tightening torques for screw connections" must
be observed.
Note
Reset the operating hours counter
Following fan replacement, the operating hours counter of the fan should be reset using
p0251 = 0.
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