Diamond DA 40 Flight Manual page 279

Airplane
DA 40 AFM
Description
Pitot Heating Caution Message (PITOT)
The Pitot heating caution message is displayed when the Pitot heating is not switched
on, or when there is a failure of the Pitot heating system.
Prolonged operation of the Pitot heating on the ground can also cause the Pitot heating
caution message to be displayed. In this case it indicates the activation of the thermal
switch, which prevents overheating of the Pitot heating system on the ground. This is a
normal function of the system. After a cooling period, the heating system will be switched
on again automatically.
Trim Failure Warning Message (TRIM FAIL)
The White Wire annunciator panel is prepared for the installation of an autopilot in the
DA 40. When the autopilot is installed and ready for operation, this warning message
indicates a failure of the automatic trim system of the autopilot. For further details, refer
to the Supplement to the AFM for the autopilot (if installed).
Unused Lights
The White Wire annunciator panel has two lights for possible future use. These lights are
currently unused.
Doc. # 6.01.01-E Rev. 8 01-Dec-2010 Page 7 - 53