Lennox LICH4012021T431E-1, Service Manual

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Electrical Control Function
Electrical Control System
112
Fr
equency
of
compr
es
sor op
er
at
io
n
B
C
A
A+
16~60K:
T4
E
D
C
B
A
A+
1.3.3.2 Indoor Fan Running Guidelines
In heating mode, indoor fan speed can be set at high, medium, low, or auto fan, and the anti-cold-wind
function is preferential.
When the compressor is running, The indoor fan is regulated as illustrated as in the following figure:
Setting fan
speed
Actual fan speed
H
（
=H
）
H+(H+=H+G)
M(M=M)
M+(M+=M+Z)
L(L=L)
L+(L+=L+D)
H-
（
H-=H-G)
M-(M-=M-Z)
L-(L-=L-D)
T1-Td
℃
L
H
M
-
When the indoor temp reaches the preset temperature, the compressor stops and the indoor fan motor runs
at the minimum speed (The anti-cold-wind is valid).
The auto fan in heating mode acts as follows: