Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 718

SECTION 9 - SUPPLEMENTS
SUPPLEMENT 1
AIRPLANE SYSTEMS AND DESCRIPTIONS
TKS ICE
INDICATION AND MESSAGING
The windshield pump is rated for intermittent use
only. Continuous operation may damage the pump.
Do not operate the WINDSHIELD position of the
MAX FLOW switch continuously longer than 6
seconds. Allow at least a total of 10 seconds
between operations.
The final operational mode of the system is the BACKUP mode.
BACKUP mode is achieved by selecting the ON position (up) on the
BACKUP switch. BACKUP mode activates the second metering pump
(opposite of the pump used in HIGH mode) and runs continuously like
HIGH mode. BACKUP mode is independent and isolated from the
other ice protection operational modes. It is provided as a redundant
capability in the event the normal operational modes are rendered
inoperable.
If BACKUP mode is selected in flight as prescribed in the Emergency
Procedures of this supplement, then the PRIMARY Switch should be
set to the OFF position, and the PRI ANTI-ICE circuit breaker pulled to
deactivate the PRIMARY system.
Other than the prescribed preflight steps outlined in the
Normal Procedures of this supplement, BACKUP mode
should never be used during normal operations. It is
intended for emergency use only (as detailed in the
Emergency Procedures of this supplement). When
operating the TKS Ice Protection System under normal
procedures, assure that the BACKUP Switch is
selected to OFF.
S1-66 U.S.
PROTECTION
WARNING
CAUTION
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MODEL 208B 867 SHP
GARMIN G1000
SYSTEM OPERATION,
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FAA APPROVED
208BPHCUS-S1-00
CESSNA
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