FortiGate-5140B chassis
Air filter
FortiGate-5140B Chassis Guide
01-500-156415-20151104
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Air filter
The FortiGate-5140B chassis includes a front replaceable air filter that removes dust from
intake air and provides static pressure to achieve uniform airflow. The filter must be
installed for the chassis to operate normally. If the air filter is not locked into place the
redundant air filter presence sensors cause an alarm.
Air filters should be inspected regularly. If dirty or damaged, the filter should be disposed
of and replaced. The air filter can be fragile and should be handled carefully.
To service the air filter you must remove the air intake bezel at the bottom of the front of
the chassis. See
for the location of the air intake bezel and air filter.
The bezel is held in place by four torq screws which must be loosened before the bezel
can be removed. The air filter can be removed using the lower flange as a handle. Gently
push the filter and tilt it down to remove it.
Care should be taken when inserting an new air filter to prevent damage to the sensors.
To insert a new filter, slide it along the guide rails at each side of the shelf until the filter
contacts springs at the back of the chassis. Then tilt the filter up until it locks into place
under the card cage. Pull the filter forward to make sure it is locked into place.
Cooling fans, cooling air flow, and minimum clearance
The FortiGate-5140B chassis contains four identical hot-swappable cooling fans installed
in the fan cabinet at the top of the chassis. See
for the location of the
cooling fans. Two fans are installed at the top of the cabinet and two at the bottom. The
fans at the bottom of the cabinet are not directly under the fans at the top, but are located
further towards the back of the cabinet. To be able to reach the bottom fans long handles
are attached to them so that you don’t have to insert your hand into the chassis to access
them.
Table 4: Telco alarm connector pin assignment
Pin
Description
1
Min
2
MinorReset-
3
Maj
4
MajorReset-
5
CriticalAlarm - NO
6
Critical Alarm NC
7
Critical Alarm COM
8
Minor Alarm NO
9
Minor Alarm NCt
10
Minor Alarm COM
11
Major Alarm NO
12
Major Alarm NC
13
Major Alarm COM
14
Power NO
15
Power COM
