Fisher FSKIF-121AE2-EU Service Manual page 123

18~60K
1.3.2.3 Indoor fan running rules
In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low, auto and
silent. When the compressor is running, the indoor fan is controlled as below:
The auto fan acts as below rules:
1.3.2.3 Evaporator low temperature T2 protection.
---T2<0℃, the compressor will stop and restart when T2
---0℃≦T2<4℃, the compressor frequency will be limited and decreased to the lower level
---4℃≤T2<7℃, the compressor will keep the current frequency.
---T2>7℃, the compressor frequency will not be limited.
Electrical Control System
T 4
A +
A
B
C
D
E
F
G
H
J
Setting fan
T1-Td ℃(°F)
speed
A
H
B
C
D
M
E
F
G
L
H
I
T1-Td
a
b
c
d
e
Actual fan speed
H+(H+=H+G)
H（=H）
H-（H-=H-G)
M+(M+=M+Z)
M(M=M)
M-(M-=M-Z)
L+(L+=L+D)
L(L=L)
L-(L-=L-D)
H
(H -L)*0.75+L
(H -L)*0.5+L
(H -L)*0.25+L
L
>=
5℃.
Electrical Control Function
119