Airwell ONG 12, Technical Manual

Page: 123 / 142

12b-10
CONTROL SYSTEM
Revision
0
12B.3.12 High Pressure Protection
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If ICT >= 61ºC, OFAN turn off. If ICT <= 55ºC, OFAN turn on.
•
If (ICT >= 66ºC) for duration of 10 seconds, COMP turn off. If ICT <= 52ºC, COMP turn on.
Note:
If ICT is invalid, High Pressure protection cannot be activated.
12B.3.13 Auxiliary Electric Heating
AHEAT will turn on, if all the following conditions are met:
•
COMP is on for 60 seconds;
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RT <= 20ºC;
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IFAN run at least at LOW speed;
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RT <= SPT – 2ºC;
•
ICT <= 50ºC.
AHEAT will turn off, if one of the following conditions is filled:
•
RT > 21ºC;
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COMP or IFAN stop;
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RT >= SPT - 1ºC;
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ICT >= 55ºC.
Note:
1. If ICT or RT is invalids, AHEAT will not be activated.
2. When the system turns off, if the AHEAT does not operate before, IFAN operates
according to the hot keep condition, otherwise, IFAN should turn off after 30 seconds’ at
supper low fan speed (Note: F/S type in low speed) to blow off the remaining heat.
ICT (ºC)
66
61
55
52
>= 10s >= 3 Min
COMP Any
Off
OFAN Any
Off