Siemens S5-135U/155U appendix Replacing the Fans

Central Controllers and Expansion Units Power Supply Units

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Replacing the Fans

Caution

Ensure correct polarity when inserting the battery or applying backup voltage.

Warning

Risk of danger to persons and property, danger of giving off harmful substances.

If handled incorrectly, a lithium battery can explode. If disposed of incorrectly, old lithium batteries can release harmful substances. You must therefore observe the following guidelines:

SDo not throw new or discharged batteries onto a fire and do not solder onto the body of the cell (max. temperature 100 °C (212 °F)). Do not

recharge them. Order your replacement battery from Siemens only (for order number see ordering instructions). This ensures that you only use a short-circuit- protected type.

SThe lithium battery is subject to regulations for hazardous materials. You should observe these regulations when you shipthe battery, for example, by using the original packaging. Used batteries should be returned to the manufacturer or a recycling station if possible or disposed of as hazardous waste. The guidelines for transporting hazardous materials should be observed.

The expected service life of the fans (see Technical Specifications) depends on their operating time, ambient temperature and ambient conditions. In the event of fan failure during operation, subsequent damage to modules, for example, is avoided by the activated fan monitor (jumper F-R closed); the power supply unit is switched off.

In individual cases, a preventive replacement of fans at suitable intervals may be advisable. Proceed as follows to replace the fans:

Step Action

1Disconnect power from the power supply.

2Remove the power supply.

3Slacken the fixing screws of the fans.

4Pull off the plug-in contacts of the fan supply.

5Connect the plug-in contacts of the new fans.

6Tighten the fixing screws of the fans.

7Refit the power supply.

8Switch the power supply on.

The order numbers for the backup battery and fan unit can be found in the ordering information.

System Manual	4-67
C79000-G8576-C199-06