Gree GWH18TC-S3DNA1D Service Manual page 53

Service Manual
temperature display is set by remote controller, it will display set temperature; when room temperature display is set, it will display
room or outdoor temperature. After that, when operating the remote controller for other settings, the temperature display method
will keep original. When operating the remote controller during room temperature display, the set temperature will be displayed for 5
seconds firstly and then room temperature display returns. If there is malfunction, corresponding malfunction code will be displayed.
For example, if ambient temperature sensor has malfunction, "F1" will be displayed; if indoor pipe temperature has malfunction, "F2"
will be displayed; if jumper cap has malfunction, "C5" will be displayed.
(11)Memory Function
Memorized items: mode, up & down swing, light, set temperature and set fan speed. When power is recovered after power failure, the
unit will automatically start operation according to memorized status. After power recovery, the unit without timer setting before power
failure will operate according to the last setting; the unit with general timer setting which has not been fulfilled before power failure will
memorize the timer setting and re-calculate the time after.
(12)I Feel function
When I FEEL command is received by controller, and also the ambient temperature is received from remote control, the controller will
operate according to the ambient temperature sent by the remote controller (For cold blow prevention, the unit operates according
to the ambient temperature sensed by the air conditioner). The remote controller will send ambient temperature data to the controller
for every 10 minutes. When the data has not been received for 11 minutes, the unit will operate according to the temperature sensed
by the air conditioner. If I FEEL function is not selected, the ambient temperature will be that sensed by the air conditioner. Ambient
temperature of I FEEL displayed by controller is 1 ~59°C.
(13)Health and Cold Plasma Function
When the unit is operating, turn health or cold plasma to be ON/OFF by health button in remote control (if there is no such button in
remote control, the health is on as default). Only when health or cold plasma is turned on and indoor fan is operation, such function
can be activated.
(14)Static Dedusting Function
When the unit is operating, turn static dedusting ON/OFF by health button in remote control (if there is no such button in remote
control, the health is on as default). Only when static dedusting is turned on and indoor fan is operation, such function can be
activated.
(15)Fahrenheit Display
Nixie tube displays current set temperature. If remote signal is Fahrenheit, the temperature will be displayed in Fahrenheit. The set
temperature range is 16~30°C. Under Auto mode, in COOL operation and FAN operation, 25°C will be displayed, while in HEAT
operation and FAN operation, 20°C will be displayed. For cooling-only controller, only 25°C will be displayed.
(16)Locked protection to Indoor Fan Motor
If the indoor fan motor keeps low rotation speed for a continuous period of time after startup, the unit will stop operation and
display"H6".
(17)Mute Mode
① Auto Mute: When selecting fan speed of auto mute, the fan speed will be adjusted according to change of ambient temperature;
when temperature meets the requirement of the setting, the unit will operate at lowest speed.
② Mute mode: When selecting fan speed of mute, the unit will directly operate at lowest fan speed.
This position is start point
(18)Compulsive Defrosting Function
① Condition of entering compulsive defrosting function
When the unit and remote controller are set in heating mode and the set temperature is 16°C, continuously pressing "+, -, +, -, +, -"
button within 5s, the indoor unit will enter compulsive defrosting setting and the indoor unit will send compulsive defrosting signal to
outdoor unit. When the outdoor unit receives the compulsive defrosting signal, it will operate in normal defrosting mode. When the
indoor unit receives the information that outdoor unit has entered defrosting, it will cancel sending compulsive defrosting signal to
outdoor unit. Heating indicator on indoor unit is off for 0.5s and then blinks for 10s.
② Condition of exiting compulsive defrosting function
The condition of exiting compulsive defrosting function is the same as that in normal defrosting; after finishing defrosting, outdoor
unit will send the signal of normal operation mode to indoor unit and when the indoor unit receives the signal, it will operate in normal
mode.
(19)Refrigerant Recycling Function
① Condition of entering refrigerant recycling function
Within 5min of energizing, turning on the unit in cooling mode of 16°C, continuously press light button for 3 times within 3s to enter
refrigerant recycling mode; Fo is displayed and send refrigerant recycling signal to outdoor unit.
② Condition of exiting refrigerant recycling mode
After entering refrigerant recycling mode, when receive any remote control signal or enter refrigerant recycling mode for 25min, the
unit will exit refrigerant recycling mode.
Operation after entering refrigerant recycling mode: indoor unit runs in cooling mode, fan speed is super high, set temperature is 16°C
and the horizontal louver opens to the min angle.
Operation after exiting refrigerant recycling mode: indoor unit will run is the set status of last time.
Technical Information
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