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approximately 4 minutes, then is terminated. The warm-up mode is activated on WTC power-up,
when the following conditions are met:
• Heat was not applied to the windshield for more than 5 seconds.
• The airplane is Weight On Wheels.
If the airplane is Weight Off Wheels, the warm-up mode is terminated. Once the warm-up mode is
terminated, it automatically switches to normal regulating mode.
Normal Regulating Mode
On WTC power-up both channels controlling the windshield and respective side window are
energized. Each channel continuously monitors the temperature through its sensor element. If the
temperature decreases below a specified low limit, the heater is turned on. If the temperature
exceeds a specified limit, the heater is turned off.
WINDSHIELD/WINDOW FAILURE INDICATION
In the event of a system failure or being turned off, a message is displayed on EICAS.
GF1410_027
L−R WINDOW HEAT FAIL
L−R WINSHLD FAIL
L WSHLD HEAT OFF
R WSHLD HEAT OFF
ICE AND RAIN PROTECTION
REV 51, Aug 14, 2006 Flight Crew Operating Manual
CSP 700−6
Volume 2
14−10−17
EICAS PHILOSOPHY
The following represents the EICAS symbols and logic for the BLEED/ANTI-ICE synoptic page. The
symbols are shown in serviceable and failure conditions.
BLEED/ANTI − ICE SYSTEM LOGIC
VALVE AND FLOW LINE
OPEN
VALVE
NOT FAILED
CLOSED
TRANSIT
INVALID
VALVE
FAILED
DIRECTION OF FLOW
LOW TEMPERATURE
WAI OFF
WING LEADING EDGE
OVERHEAT
SUFFICIENT HEAT
ENGINE COWL
CAI ON CAI OFF
GF1410_028
ICE AND RAIN PROTECTION
Flight Crew Operating Manual REV 51, Aug 14, 2006
CSP 700−6
Volume 2
14−10−18
ICE AND RAIN EICAS MESSAGES
L−R WINDOW HEAT FAIL
Indicates that the
respective window heater
temperature controller has
failed.
ICE
Indicates that ice has been
detected and one or the other
system is OFF.
WING A/ICE OVHT
Indicates that an overtemperature
has been detected in the wing
anti-ice system.
L−R WING A/ICE FAIL
Indicates that the wing anti-ice
valve is not in the selected
position.
PITOT 1−2−3 HT FAIL
Indicates that the respective
pitot heater has failed.
WING A/ICE LEAK
Indicates that a bleed leak has been
detected in the wing anti-ice system.
STBY PITOT HEAT FAIL
Indicates that the standby pitot
heater has failed.
ICE DETECTOR FAIL
Indicates the loss of both
ice detectors.
L−R COWL A/ICE FAIL
Indicates that the cowl anti-ice
valve is not in the selected
position.
L−R WSHLD HEAT FAIL
Indicates that the respective
windshield heater temperature
controller has failed.
L−R AOA HEAT FAIL
Indicates that respective
AOA has failed.
WING A/ICE LO HEAT
Indicates that there is insufficient
heat in the wing leading edge duct.
GF1410_029a
R AOA HEAT FAIL
ICE DETECTOR FAIL
L AOA HEAT FAIL
ICE
L WINDOW HEAT FAIL
L COWL A/ICE FAIL
R COWL A/ICE FAIL
R WING A/ICE FAIL
R WINDOW HEAT FAIL
L WING A/ICE FAIL
L WSHLD HEAT FAIL
R WSHLD HEAT FAIL
PITOT 1 HT FAIL
WING A/ICE OVHT
PITOT 2 HT FAIL
PITOT 3 HT FAIL
STBY PITOT HT FAIL
WING A/ICE LEAK
WING A/ICE LO HEAT
ICE AND RAIN PROTECTION
REV 51, Aug 14, 2006 Flight Crew Operating Manual
CSP 700−6
Volume 2
14−10−19
ICE AND RAIN EICAS MESSAGES (CONT'D)
ICE DETECTOR FAULT
Indicates that there is a loss of
one ice detector.
L−R PROBE MON FAIL
Indicates that the heater status
of the probes and associated
systems is not verified.
TAT HT 1−2−3 FAIL
Indicates that the respective
TAT heater has failed.
WING A/ICE FAULT
Indicates loss of redundancy
on wing anti-ice system.
ICE
Indicates that cowl or wing anti-icing has
been detected with anti-ice systems ON.
WING A/ICE SENSOR
Indicates loss of both outboard
wing anti-ice temperature
sensors.
L−R COWL A/ICE FAULT
Indicates that there is a loss of
the affected cowl anti-ice.
YD HEAT 1−2 FAIL
Indicates that the respective
yaw damper heater has failed.
GF1410_030a
R PROBE MON FAIL
L PROBE MON FAIL
TAT HT 3 FAIL
TAT HT 1 FAIL
TAT HT 2 FAIL
WING A/ICE FAULT
WING A/ICE SENSOR
R COWL A/ICE FAULT
TAT 3 FAIL
TAT 1 FAIL
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