Honda HondaJet HA-420 Pilots Operating Manual page 179

Honda Aircraft Company
HA-420 SYSTEMS
POM DESCRIPTION
When activated, the EMEDS begins to fire in a 2-minute cycle with 20
seconds of "active firing" and a 100-second period of "dwell" between
firings. If operating in the NORM mode, once the ice detected signal is
removed, the HTIPS will complete the present cycle and then complete
one additional cycleAir Data Probes
Windshield Ice and Rain Protection System
Each windshield has two heating zones (L and R). Each pair of heating
zones has a dedicated windshield heat controller. Each zone has two
temperature sensors, one for control and one for monitoring. Heating is
achieved by sending electrical current through a thin gold film. The
windshields are made from hydrophobic material to assist in rain
removal.
When the windshield L or R ZONE switch is in the NORM position, the
associated zones will be heated in low power mode whenever an engine
is running on the ground or in flight. R zones are heated on external
power on the ground. When ice is detected by either ice detector in
flight, the two inboard zones will operate in a high heat mode. Selecting
a switch to OFF disables heating for the associated zones.
If one generator is lost, heating of the L zone of each windshield is
disabled.
Ice Detection System
The dual ice detector system is the primary means of detecting icing
conditions. One ice detector probe is located on each side of the forward
lower fuselage.
An ICE DETECTED advisory CAS message posts when either sensor
detects icing conditions. If one or more ice protection systems are
selected off or are not operational, an ICE PROT NOT ACTIVE
caution CAS message will post.
HJ1-29000-005-001
October 30, 2016 1-163
FOR TRAINING PURPOSES ONLY