Indoor Unit - Basic Function Of System - Gree Neo GWH09MA-A3DNA3A Installation, Service & Troubleshooting

Basic Functions - 18K & 24K 230 volt
A. Basic function of system
(1) Cooling mode
1.Under this mode, fan motor, swing will work under setting status, the temp. range is 61-86
2.Outdoor unit malfunction or unit stop running, indoor unit will keep original running status, malfunction
displayed.
3.When0(Tset-Tamb.), if indoor fan motor is high speed, that the fanmotor is running in middle speed, the middle
speed or low speed will be maintained;(this condition should be executed when compressor start up);the super high
speed will not rotate; When
(Tamb-Tset) ≥33.8°F the fan will return to the setting fan speed.
(2) Drying mode
1.Under this mode, fan motor will run at low speed, swing will work at setting status ,setting temp. range is 61-86 °F.
2.Outdoor unit malfunction or protection, unit will stop, indoor unit will keep original running status, malfunction
displayed.
(3) Fan mode
Under this mode ,indoor fan motor could be set at high, middle, low or auto speed, compressor, outdoor unit and
valve will stop to run. Under this mode, temp. range should be 61-86 °F.
(4) Heating mode
1.Under this mode, temp. range should be 61-86 °F.
2.Working condition and procedure of heating mode: When unit turn on and enter into Heating mode, indoor unit
enter into anti-cool
wind mode, when unit is stop running, and indoor fan motor turns on, blowing heat will act.
3.Protection function, under heating mode, compressor will stop to run due to malfunction happened, indoor fan
motor will blow surplus heat.
4.Defrosting control: When receiving the defrosting signal from outdoor unit, displayer will display H1,10s later,
indoor fan motor will stop to run.
5.Anti-cold wind function
6.Blow heat air function
a. If heating temp. meets the compressor stop running condition, compressors, outdoor fan motor will stop to run, the
upper and lower guide louver will rotate to horizontal position L, indoor fan motor run at setting fan speed for 60s,
then the indoor fan motor will stop to run.
b. Due to block running, the air guide board will keep the position when it stopping. (under each mode), other
malfunction unit will stop to run, the upper and lower air guide louver will rotate to horizontal position, indoor fan
unit will run at setting fan speed and run for 60s, indoor fan unit will stop to run.
(5) Auto mode
1.When Tamb≥78.8°F, select the cooling mode, at this time, the setting temp. is 77 °F.
2.Cooling and heating units: Tamb≤71.6°F, will run at heating mode, at this time, the setting temp. is 68-73 °F.
3. Cooling only unit: When Tamb≤71.6 °F, it will run at Fan mode, the setting temp. is 77 °F.
4.When 73.4°F≤Tindoor amb. ≤ 77 °F, firstly enter into auto mode and run at auto fan speed,
other modes will run at auto mode, will keep the previous running mode. (When entering into dehumidifying mode,
it will run at auto fan speed)
Product Introduction
Indoor Unit
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