12a-6
CONTROL SYSTEM
Revision 0
12Α.4.2. IFAN operation
• Min time interval between IFAN speed changes in AUTOFAN Mode is 30 sec.
• Max time interval between IFAN speed changes in H/M/L Mode is 60 sec.
• Strong IFAN speed is only used in cool and heat mode and is controlled by R/C. Strong
IFAN cannot be remembered by EEPROM.
• IFAN speed in Heat/Cool and Auto fan 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
• IFAN uses PG motor and closed loop control.
12Α.4.3. OFAN operation
• Min time interval between OFAN ON/OFF state changes is 30 s.
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