![background image](/i/gree/159317/gree-home-gmv/h/gree-home-gmv-074.png)
Dc Inverter VRF plus Water Heater Solution Service Manual CONTROL
70
Outdoor Ambient
Temp
T
≤
11
℃
11
℃<
T
≤
15
℃
15
℃<
T
≤
22
℃
T
>
22
℃
Fan
Frequency
Max.
41Hz 33Hz 28Hz
Remarks
:
max.value is 50Hz
When calculated capacity of the complete unit
≤
40
%
Outdoor
Ambient
Temp
T
≤
3 3
<
T
≤
7 7
<
T
≤
11 11
<
T
≤
15 18
<
T
≤
22 T
>
22
Fan
Frequency
Max. 41Hz 33Hz
28Hz
23Hz
21Hz
Remarks
:
max.value is 50Hz
Fan Control after 3min
Frequency of fan is adjusted in 3min later according to the change of pressure.
Once the lowest value or the highest value of the frequency has been reached, it can’t adjusted anymore.
The max.frequency of fan is 50HZ and the min. is in the below table.
Outdoor Ambient
Temp
T
≤
11
℃
11
℃<
T
≤
15
℃
15
℃<
T
≤
22
℃
T
>
22
℃
Lowest Fan
Frequency
20 15Hz 10Hz 5Hz
Detect discharge pressure after 3min startup of the unit. Fan frequency is adjusted every 2 periods according
to the average value of discharge pressure so that the pressure can be restrained within optimized range. If the
pressure is higher than the setting range, the frequency of outdoor fan will increase; If the pressure is lower than
the setting range, the frequency of outdoor fan will decrease.
◆
Heating/Water Heating Mode
The fan runs at initial speed acoording to ambient temp for 3 min which is applicable when the unit is just
started or the mode of the unit is shifted or the frequency will be adjusted according to pressure.
When calculated capacity of the complete unit
>
40
%
Outdoo
r Ambient
Temp
T
≤
11
℃
11
℃<
T
≤
15
℃
15
℃<
T
≤
22
℃
T
>
22
℃
Fan
Frequency
Max. 41Hz 33Hz
28Hz
Remarks
:
max.value is 50Hz
When calculated capacity of the complete unit
≤
40
%
Outdoor
Ambient
Temp
T
≤
3 3
<
T
≤
7 7
<
T
≤
11 11
<
T
≤
15 18
<
T
≤
22 T
>
22
Fan
Frequency
Max. 41Hz 33Hz 28Hz 23Hz
21Hz
Remarks
:
max.value is 50Hz
Detect discharge pressure after 3min startup of the unit. Fan frequency is adjusted every 2 periods according
to the average value of discharge pressure so that the pressure can be restrained within optimized range. If the
pressure is higher than the setting range, the frequency of outdoor fan will increase; If the pressure is lower than
the setting range, the frequency of outdoor fan will decrease.
◆
Water Heating Mode
Initialization: is the same as that of the heating mode which is is applicable when the unit is just started or the
mode of the unit is shifted or the frequency will be adjusted according to pressure. The highest value is 50HZ and