Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 723

CESSNA
MODEL 208B 867 SHP
GARMIN G1000
AIRPLANE SYSTEMS AND DESCRIPTIONS
TKS ICE
INDICATION AND MESSAGING
When the amber A-ICE FLUID LO annunciator comes ON
cross-check the anti-ice fluid quantity indication (A-ICE
GAL) to verify a low fluid level condition exists. This system
is designed to trigger the annunciator when anti-ice fluid
quantity reaches two (2) U.S. gallons.
The red A-ICE PRESS LOW annunciator is tied to the two low pressure
sensors in the tail of the airplane. A low pressure condition on either
sensor will trigger the red A-ICE PRESS LOW annunciator, indicating
that system pressure is too low for normal system operation and may
be indicative of potential substandard ice protection performance.
In BACKUP mode, the red A-ICE PRESS LOW annunciator is armed
immediately upon selecting BACKUP ON. If a low pressure condition
exists, the red A-ICE PRESS LOW annunciator will display immediately
on both PFDs warning the crew to exit icing conditions immediately.
With BACKUP selected ON, the red A-ICE PRESS LOW
annunciator will momentarily appear and remain ON until
system pressure is sufficient to inhibit the annunciator.
The red A-ICE PRESS LOW annunciator is inhibited for a period of
time in both PRIMARY modes of NORM and HIGH. When HIGH is
selected, any red A-ICE PRESS LOW annunciator will be inhibited for
15 seconds. After the 15 second period, any low pressure condition will
trigger the red A-ICE PRESS LOW annunciator. Selecting PRIMARY
OFF will reset the CAS inhibiting functions.
FAA APPROVED
208BPHCUS-S1-00
PROTECTION
NOTE
NOTE
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SECTION 9 - SUPPLEMENTS
SUPPLEMENT 1
SYSTEM OPERATION,
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U.S.
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S1-71