Airwell FBF030 - General Functions

11-4
CONTROL SYSTEM
SM FBFRPM 1-A.0 GB
11.3 General Functions
11.3.1 COMP Operation
a. For each Mode including POWER OFF & SB, a Min time delay of 3 min before
COMP restarting, excluding DEICING Mode.
b. The Min operation time of COMP under different operating conditions is:
Operation Mode Min Operation Time of COMP
Heat, Cool, HP protection or Auto Modes 3 min.
Fan, Dry, Overflow, Protection Modes, or Mode Change Ignored
11.3.2 IFAN operation
a. Min time interval between IFAN speed change in AUTOFAN Mode is 30 sec.
b. Min time interval between IFAN speed change in H/M/L Mode is 1 sec.
c. IFAN speed in Heat/Cool AUTOFAN Mode is determined according to the
following chart:
T [
o
c]
L
M
H
IFAN speed
3142
Where in Heat Mode: 'T = SPT - RT
in Cool Mode: 'T = RT- SPT
11.3.3 OFAN Operation
Min time interval between OFAN ON/OFF state changes is 30 sec.
11.3.4 HE Operation
a. Min Heaters ON or OFF time is 30 sec.
b. Heaters can never be in operation while IFAN is OFF.
c. In RH group, HE-1 and HE-2 will be activated only when COMP is not operating,
except in Dry Mode.