Carrier ComfortVu TB-24-HM Installation And Operation Manual page 54

Technician Settings (cont.)
P71 – Fan VFS Medium speed percent in heating
Range: 30...60%
Default: 50%
P72 – Fan VFS High speed percent in heating
Range: 60...100%
Default: 80%
P74
VFS Medium speed differential
(display from medium to low)
P75
VFS High speed differential
(display from high to medium)
P74 – VFS Medium speed differential
Range: 10...50%
Default: 35
P75 – VFS High speed differential
Range: 10...50%
Default: 35
Fan VFS Medium
Speed
speed diff.
on
50-35%=15
display
High
Medium
Low
20%
Fan VFS
Low speed Med. speed
percent
In cooling
- 54 -
VFS Med %
in heating
VFS High %
in heating
Fan VFS High
speed diff.
90-35%=55
VFS %
In
50% 90%
cooling
Fan VFS Fan VFS
High speed
percent percent
In cooling In cooling
VFS Med speed
differential
VFS High speed
differential