30
Outdoor Temperature (T4)
Cooling
>29°C
18°C to 29°C
<17°C
>84.2°F
64.4°F to 84.2°F
<62.6°F
Modify Rate
100%
60%
40%
When there is more than one indoor unit:
Outdoor Temperature (T4)
Cooling
>25°C
17°C - 25°C
<17°C
>77°F
62.6°F - 77°F
<62.6°F
Modify Rate
100%
80%
40%
NOTE:
The final result is integer.
In low ambient cooling mode, modify rate is fixed as 40%.
According to the final capacity request to confirm he operating frequency, as following table.
Frequency (Hz)
0
COOL_
F1
COOL_
F2
...
...
COOL_
15
COOL_
16
Amendatory capacity
demand
0
1
2
...
...
15
16
Meanwhile the maximum running frequency will be adjusted according to the outdoor ambient temp.
17.3. Outdoor Fan Control
17.3.1. Cooling Mode
Normally the system will choose the running fan speed according to ambient temperature:
T4
A
DC_FAN_HI_SPD_ADD
B
DC_FAN_MID_SPD_ADD
C
DC_FAN_MIN_SPD_ADD
D
DC_FAN_SLOW_SPD_ADD
E
DC_FAN_SSLOW_SPD_ADD
23
℃
22
℃
20
℃
28
℃
19
℃
17
℃
26
℃
25
℃
When low ambient cooling is valid:
27
High
Low
25
20
15
low ambient cooling
Outdoor fan speed control logical (low ambient cooling).
When T4 <15°C (59°F) and T3 < 30°C (86°F), the unit will enter into low ambient cooling mode. The outdoor fan will choose
speed according to T3.
When T3≥38°C (100.4°F) or when T4≥20°C (68°F), the outdoor fan will choose the speed according to T4 again.
