Replacing a Fan Module
If the only fan of the USG fails, replace the fan module immediately. Otherwise, heat dissipation of the device is affected. If the USG has two or more fans and two or more fans fail, replace the faulty fan modules immediately. Otherwise, heat dissipation of the device is affected. This section is irrelevant to other models that do not have independent fan modules.
Context
The fan module of the USG is hot swappable. Therefore, when the fan module is faulty, you can replace the fan module without powering the USG off.
To prevent USG overheating, replace the fan module within 1 minute.
Procedure
- Wear an ESD wrist strap.
- Remove the faulty fan module.
Press upwards the fan module latch, hold the handle of the fan module, and pull out part of the fan module. After the fan stops rotating, slowly pull out the fan module from the chassis.
- Install a new fan module.
Hold the handler of the fan module with one hand and the bottom of the fan module with the other hand, insert the fan module along the guide rail of the fan slot until the back of the fan module gets in good contact with the chassis backplane. After the latch on the power module is tightened, pull the fan module gently to check whether it can be removed.
Figure 1 Replacing the fan module
- Check the FAN STATUS indicator on the panel. If the indicator is blinking green every two seconds (0.5 Hz), the new fan module works properly.
Follow-up Procedure
After replacing the fan module, collect all tools. If the replaced fan module is faulty, fill in the Repair Transmission Sheet and send the faulty module with the Repair Transmission Sheet to the equipment supplier or the specified repair service provider.