Cooling Fans, Cooling Air Flow, And Minimum Clearance - Fortinet FortiGate-7000E Series System Manual

FortiGate-7060E chassis

Cooling fans, cooling air flow, and minimum clearance

The FortiGate-7060E chassis contains three hot swappable cooling fan trays installed in the back of the chassis. Each
fan tray includes two fans that operate together. When the fan tray LED is green, both fans are operating normally. If
the LED turns red or goes off, one or both of the fans is not working and the fan tray should be replaced.
During normal chassis operation, all three fan trays are active and the fan speed is controlled by the active SMM. If a
single fan tray fails, the SMM sends a warning message and the SMM front panel fan LEDs indicate that a fan tray has
failed. The SMM maintains sufficient cooling by running the still operating fans at full speed to make up the airflow loss
caused by the failed fan tray. The failed fan tray should be replaced as soon as possible.
If a second fan tray fails, the chassis can continue to operate but the chassis may experience high temperature
warnings. Maintaining a lower ambient temperature can reduce the chance for overheating.
Fan trays are hot swappable. You can replace a failed fan tray while the chassis is operating. To replace a fan tray,
unscrew the four retention screws and use the handles to pull the fan tray out of the chassis.
Install a replacement fan tray by sliding it into place in the empty slot and tightening the retention screws. As you slide
the new fan into place it will power up and the fan tray LED will light.
The other fan trays will continue to operate and cool the chassis as a fan tray is being removed and replaced. However
an open fan tray slot will result in less air flow through the chassis so do not delay installing the replacement fan tray.
The active FortiGate-7060E System Management Module (SMM) monitors the internal temperature of the chassis and
adjusts the operating speed of the cooling fans as required. When the chassis is first powered on, all cooling fans run at
full speed. Once the active SMM is up and running, it reduces cooling fan speeds to maintain an optimum temperature
in the chassis. If an SMM is not available or is not operating correctly, the fans always operate at full speed.
During normal operation, all fan trays are active. If cooling requirements increase, the fan speed will increase.
FortiGate-7060E 6.4.2 System Guide
Fortinet Technologies Inc.
16