Description Of Each Control Operation - Gree GWC12KF-K3DNA5A Service Manual

6.3 Description of Each Control Operation

(1)Cooling Mode
1. When room temp-set temp ≤-2℃ ， cooling will stop;
Outdoor fan will stop later and indoor fan will operate at set
speed;
2. When room temp –set temp ＞ -2℃, if such situation
continues for a period of time, cooling operation will be
started. In that case, indoor fan, outdoor fan and
compressor will operate and the indoor fan will operate at
set speed.
* In this mode, fan and swing motor will operate at set status
and the temp range setting is 16~30℃（61~86℉）.
* If there is malfunction of outdoor unit or the unit stops for
protection, the indoor unit will keep its operation status but the
error will be displayed.
C
B
A
Indoor temperature- set temperature
(2)Dry Mode
1. In this mode, the fan motor runs at low fan speed while swing works
according to setting state. The range of setting temperature is 16~30
(61~86¨H).
2. When outdoor unit has malfunction or stopped for protection,
the indoor fan will keep the original running state and the error will be displayed.
(3)Fan Mode
1. In this mode, the indoor fan may run at high, medium, low and automatic
speed. The compressor, outdoor fan and 4-way valve all stop running.
2. In this mode, the range of setting temperature is 16~30
(4)Heating Mode
1. Heating mode
When setting temperature-indoor temperature<= -1.5
the unit will stop heating. Both outdoor fan and indoor fan will stop later.
When setting temperature-indoor temperature>-1.5
certain period, the unit will start heating. In that case, indoor fan, outdoor fan
and compressor will start running. The indoor fan works according to the
operation of cold air prevention.
* In this mode, the range of setting temperature is 16~30
A
Set temperature- indoor temperature
B
C
2. Protection function: in heating mode, when the compressor stops as
a result of malfunction, the indoor fan blows residual heat.
3. Defrosting control: when the defrosting signal is received, the
defrosting mark H1 will be shown. The e-heater and indoor fan stop.
26
* Cold air prevention function
The rotational speed of indoor motor is decided based on the
indoor pipe temperature. The indoor fan can run at low speed or stop
running. This function will terminate after the unit runs for 3min or the
pipe temperature reached certain value.
During heating, if the indoor pipe temperature is lower than certain value.
The running speed of indoor fan will decrease automatically based on the
pipe temperature to ensure that the outlet air is hot.
* X-Fan function
During heating, when conditions for stop of the compressor is reached,
the compressor and the outdoor fan stop running while the horizontal
louver rotates to level L. the indoor fan will stop after running for
60s at setting speed.
(5)Auto Changeover Mode
In this mode, the system selects the operation mode (cooling, heating, and fan)
automatically according to the ambient temperature. The display shows the
actual operation mode and setting temperature. There will be 30s delay for
mode conversion. The protection function is the same as that of other modes.
1. When T amb =25
2. for heat pump unit: when Tamb =22
3. for cooling only unit: when Tamb < 22
4. When 22
enter auto mode and run in automatic fan mode. If the other mode
o
C
changes to auto mode, the previous operation mode will remain.
o
C (61~86¨H).
o
C,
o
C and it lasts for a
(6)Auto fan speed Mode
In auto fan mode, the rotational speed of the fan for indoor unit is
decided by the differential temperature between ambient temperature and
setting temperature. In dry mode, the automatic fan speed is
forced to be low.
o
C (61~86¨H).
No. of
jumper
cap
℃
, the cooling mode is selected.
℃
℃
<T indoor amb< 25
Cooling Heating
operation
operation
With compressor capacity supplied
With no compressor capacity supplied
ｕｎｉｔ Super-high
ｍｏｄｅ
fan speed
ｔｙｐｅ
Rotational speed
1300
during cooling
1 09K
Rotational speed
1300
during heating
Rotational speed
1350
during cooling
2 12K
Rotational speed
1350
during heating
℃
, the unit runs in heating mode
℃
, the unit runs in fan mode. .
, upon initial startup, the unit will
Cooling
operation
Low fan
High fan
Medium
speed
speed fan speed
1100 900 700
1140 980 820
1150 950 750
1190 1020 850