IFD400 Series Pilot Guide
General 6-35
HIGH TEMPERATURE OPERATIONS
Like all similar units, the IFD tends to generate a lot of heat,
especially if equipped with a transmitting radio. There is
extensive internal temperature monitoring on all of the electrical
components, and alerts in the form of CAS messages if the
internal temperature gets too high. Part of the temperature
mitigation design is that the metal bezel is intentionally designed
to radiate heat away from the internal components and out of the
unit. This can have the effect of a bezel that may be warm to the
touch. This is considered normal. Note that the rubber bezel
buttons will not conduct this heat and should not be warm. This
condition will be more noticeable on hot days or during long
ground runs. The IFD does not require external or forced cooling
air but is designed to accept cool air intake in those installations
where excessive heat is generated by surrounding avionics or
there is significant blockage of air flow behind the panel.
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