Airwell ONG 12, Техническое руководство

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12b-11
CONTROL SYSTEM
Revision
0
12B.3.14 Deicing
Deicing starts, if OCT <= -6ºC and meets with one of the following conditions:
•
ICT < 39ºC, and IFAN is on for 20 minutes, and COMP is on for 5 minutes, and that
ICT decrease 1ºC per 6 minutes, occur 3 times;
•
ICT < 39ºC, and (sum of COMP on >= 3 Hours), and COMP is on for 20 minutes;
•
ICT – RT < 19ºC ( for F/S :ICT-RT<16ºC )keep for 5 minutes, and (sum of COMP
on) > 45 minutes ,And COMP is on for 20 minutes;
•
(4) ICT =< 35 ºC, and IFAN is on for 20 minutes, COMP is on for 5minutes,and sum
of COMP on > 45 minutes.
Note:
•
If OCT is invalid, and (ICT < 39ºC), and COMP keeps on for 30 minutes, and
ICT is decreasing 1ºC per 6 minutes occur 3 times;
•
If OCT and ICT are invalid; and if (sum of COMP on) >= 3 Hours;
•
If ICT is invalid, and (OCT <-6ºC) keeps for 4 min, (sum of COMP on) > 45min.
12B.3.14.1 Deicing process
:
•
At the beginning of Deicing, COMP, IFAN, OFAN stop, RV stops after 55 seconds,
and then COMP will turn on after 5 seconds.
•
Deicing ends if (OCT >= 12ºC) or Deicing time is more than 9 minutes.
•
Once deicing ends, IFAN operates according to anti-cool fan mode;
•
Once deicing ends, COMP stops for 20 seconds, OFAN will turn on. After 35
seconds, RV will turn on, 5 seconds later COMP resumes its operation;
•
If AHEAT is operating when deicing conditions met, AHEAT will be turned off, and o
deicing starts 1 minute later.
•
After Deicing ends, if the conditions of AHEAT opening are met, AHEAT will turn on.
Note:
1. Deicing can’t end at the first 60 seconds once it was activated.
2. If OCT is invalid, Deicing ends after 5 minutes.
According to anti-cool wind
IFAN Any
Off
OFAN Any
Off
RV Any
Off
COMP Any
Off
AHEAT Any
Off
1min 55s 5s 9 min or OCT >= 12 ºC 55s 20s 5s