Gree GWH12MB-K3DNE3G Service Manual page 23

① Cooling mode: in auto cooling mode or normal cooling mode, the auto fan speed will run at below mode:
a. When Tamb.≥Tpreset+2°C, the indoor fan will run at high speed;
b. When Tpreset<Tamb.<Tpreset+2°C, the indoor fan will run at middle speed;
c. Tamb.≤Tpreset, the indoor fan will run at low speed;
Switches between high speed and middle speed, middle speed and low speed, high speed and low speed, running time of 3.5
minutes must be ensured.
② Heating mode: in auto heating mode or normal heating mode, the auto fan speed will run at below mode:
a. When Tamb.≤Tpreset+1°C, the indoor fan will run at high speed;
b. When Tpreset+1°C<Tamb.<Tpreset+3°C, the indoor fan will run at middle speed;
c. Tamb. ≥Tpreset+3°C, the indoor fan will run at low speed;
Switches between high speed and middle speed, middle speed and low speed, high speed and low speed, running time of 3.5
minutes must be ensured.
Fan mode is the same as cooling mode.
(7) Buzzer Control
The buzzer will send a "Di" sound when the air conditioner is powered up or received the information sent by the remote control or
there is a button input, the single tube cooler doesnt receive the remote control ON signal under the mode of heating mode.
(8) Auto button
If the controller is on, it will stop by pressing the button, and if the controller is off, it will be automatic running state by pressing the
button, swing on and light on, and the main unit will run based on the remote control if there is remote control order.
(9) Up-and-Down Swinging Control
When power on, the up-and-down motor will firstly move the air deflector to counter-clockwise, close the air outlet. After starting the
machine, if you dont set the swinging function, heating mode and auto-heating mode, the up-and-down air deflector will move to
D clockwise; under other modes, the up-and-down air deflector will move to L1. If you set the swinging function when you start the
machine, then the wind blade will swing between L and D. The air deflector has 7 swinging states: Location L, Location A, Location
B, Location C, Location D, Location L to Location D, stop at any location between L-D (the included angle between L~D is the same).
The air deflector will be closed at 0 Location, and the swinging is effectual only on condition that setting the swinging order and the
inner fan is running. The indoor fan and compressor may get the power when air deflector is on the default location.
(10) Display
① Operation pattern and mode pattern display
All the display patterns will display for a time when the power on, the operation indication pattern will display in red under standby
status. When the machine is start by remote control, the indication pattern will light and display the current operation mode (the mode
light includes: Cooling, heating and dehumidify). If you close the light key, all the display patterns will close.
② Double-8 display
According to the different setting of remote control, the nixie light may display the current temperature (the temperature scope is from
16°C to 30°C) and indoor ambient temperature. The set temperature displayed in auto cooling and fan mode is 25°C and the set
temperature displayed in auto heating mode is 20°C. Under heating mode, nixie tube displays H1 or heating indicator is off 0.5s and
blinks 10s in defrosting.(If you set the fahrenheit temperature display, the nixie light will display according to fahrenheit temperature)
(11) Protection function and failure display
E2: Freeze-proofing protection
E6: Communication failure
F1: Indoor ambient sensor start and short circuit (continuously measured failure in 5S)
F2: Indoor evaporator sensor start and short circuit (continuously measured failure in 5S)
F3: Outdoor ambient sensor start and short circuit (continuously measured failure in 30S)
20
O(0 )
heating angle
E4: Exhausting protection
E8: Overload protection
cooling angle
O(0 )
L
A
B
C
D
E5: Overcurrent protection
Service Manual
L1
A1
B1
C1
D1
Technical Information