Carrier 42QHF009DS Service Manual page 51

11.7.4.3 Indoor fan running rules
(1) Indoor Fan actions in heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but Anti-cold wind function prevails.
Anti-cold wind control function in heating mode:
(2) Auto wind in heating mode
For Console:
For A5 duct:
For the other types
Heating
E
21
19
D
18
16
C
15
13
B
12
A
10
T1-Ts-ΔT
Low
2.5
2
Medium
1.5
1
T1-Ts+(6-ΔT)
2.5
2
Medium
1.5
1
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High
Low
High