Removing a Fan Tray from a QFX3600 or QFX3600-I Device
Before you remove a fan tray from a QFX3600 or QFX3600-I device, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).
Ensure that you have the following parts and tools available to remove a fan tray from a QFX3600 or QFX3600-I device:
ESD grounding strap
An antistatic bag or an antistatic mat
The fan trays in QFX3600 and QFX3600-I devices are hot-removable and hot-insertable field-replaceable units (FRUs): you can remove and replace them without powering off the device or disrupting device functions.
Replace a failed fan tray with a new fan tray within 1 minute of removal to prevent chassis overheating.
To remove a fan tray from a QFX3600 or QFX3600-I device (see Figure 1):

When a fan tray is removed, the CLI message Fan/Blower is Absent is logged in the system log, and the system raises a minor alarm.