Fan Mode; Cooling Mode; Indoor Fan Running Rules; Operation Modes And Functions - koppel KV24 ODU-ARF21C Service Manual

1.3 Operation Modes and Functions

1.3.1 Fan mode

(1) Outdoor fan and compressor stop.
(2) Temperature setting function is disabled, and no setting temperature is displayed.
(3) The louver operates same as in cooling mode.
(4) Auto fan:

1.3.2 Cooling Mode

1.3.2.1 Outdoor fan running rules
The outdoor unit will be run at different fan speed according to T4.

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:
Electrical Control System
High
Medium
Low
Setting fan
T1-Td ℃(°F)
speed
A
H
B
C
D
M
E
F
G
L
H
I
T1-Ts
High
Medium
High
Low
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)
Low
Electrical Control Function
93