BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual page 305

Controls and Indicators
Windshield anti-ice and side window defog-
ging are controlled by a pair of three-posi-
tion WSHLD switches on the right side of the
ANTI-ICE panel (Figure 10-10). Placing the
switches labeled "LEFT" and "RIGHT" to the
LOW position activates the automatic opera-
tion of the system and keeps the front and side
windshields free of fog or mist. The HIGH
position increases heat only to the front wind-
shield to provide anti-ice protection.
Figure 10-10. Windshield Anti-icing
Controls and Indicators
Failure indicators are provided for each panel.
The associated amber NO HT indicator illu-
minates when a panel is not receiving sufficient
electrical power to maintain adequate heating.
Illumination of a NO HT light is accompanied
by illumination of the ANTI-ICE annunciator
and the flashing MASTER CAUTION lights.
Excessive heat in a panel will trip the associ-
ated heat relay and deactivate the appropriate
controller circuit. In this situation, the NO
HT light for that panel will also illuminate.
The heater relay may trip for a number of
other reasons as well. However, once tripped,
the relay will not reset automatically when
the fault is corrected. The crew may attempt
to reset the relay by moving the appropriate
WINDSHIELD switch to OFF/RESET and
back to ON.
10-10 CL 601-3A/R
CL-600-2B16 PILOT TRAINING MANUAL
A PRESS TO TEST pushbutton, located on the
anti-icing control panel, tests both the left and
right systems. When the button is pressed, a
signal is sent to override the temperature sen-
sors and monitor the output current. If the
system is operating satisfactorily, the adja-
cent green TEST lights illuminate.
Air Data System (ADS)
Anti-icing
General
Electric heating elements are used to anti-ice
pitot-static probes, the angle-of-attack vanes,
the total air temperature probe, and the alter-
nate static ports (see Figure 10-1).
Operation
The heating elements in each of the 7 ADS sen-
sors receive 115-volt AC power from one of
3 AC buses.
AC bus 1 powers the left alternate static port
and the total air temperature probe. AC bus 2
powers the right pitot-static probe, the right
angle-of-attack vane, and the right alternate
static port. The AC essential bus provides
power to the left pitot-static probe and the left
angle-of-attack vane.
Controls and Indicators
Electrical power to all heating elements is
controlled by an eight-position rotary switch
on the ADS heater control panel (Figure 10-
11). Placing the PWR & METER SELECT
switch in any position other than HTRS OFF
powers all seven heating elements.
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
CAUTION
Pulling the DC essential bus circuit
breaker labeled "ADS HTR CONT"
will deenergize the heater relay,
thereby activating all the heaters.
L t é e
L t d .