Brief Description Of Modes And Functions - Gree GWH12UB-K3DNA4F Service Manual

Service Manual

6.3 Brief Description of Modes and Functions

Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32
Indoor unit
1.This controller includes functions as below
(1) Auto; (2) Cooling; (3) Dry; (4) Fan; (5) Heating
2.Control object of controller
(1)Indoor unit :
Cooling mode: seven kinds of fan speed in total (including quiet, fan 1, fan 2, fan 3, fan 4, fan 5, turbo).
Heating mode: five kinds of fan speed in total (including quiet, fan 1, fan 2, fan 3, fan 4, fan 5, turbo).
Fan mode: Fan speed is same as that under cooling mode.
Dry mode: Low fan and quiet can be set under this mode. The fan speed is same as that for low fan under cooling mode.
Auto mode: Turbo is not available for this mode and the fan speed is same as that under each operation mode (cooling mode, fan
mode, heating mode).
(2)Stepping motor for up&down swing.
(3)Stepping motor for swing mechanism.
(4)Stepping motor for left&right swing.
(5)E-heater.
(6)Health function(cold plasma reserved).
(7)Normal buzzer.
3.Basic functions of system
(1)Cooling mode
① Operation condition and process for cooling mode ( refer to outdoor unit instruction for inverter unit).
② Protection function ( refer to outdoor unit instruction for inverter unit).
(2)Dry mode
① Operation condition and process for dry mode.
② Protection function ( refer to outdoor unit instruction for inverter unit).
(3)Heating mode (not for cooling only unit)
① Operation condition and process for heating mode.
② Defrosting condition and process (refer to outdoor unit instruction for inverter unit): As for normal intelligent defrosting; the unit will
defrost automatically according to frosting condition and operation indicator will be on 10s and off 0.5s circularly. As for non-strop
defrosting, the indoor fan will be started up according to the frosting condition and the operation indicator will be on 10s and off 0.5s
circularly.
③ Protection function (refer to outdoor unit instruction for inverter unit).
(4)Fan mode
Under this mode, indoor fan operates at set fan speed. Compressor, outdoor fan, 4-way valve and electric heating tube all stop
operation. Under this mode, the temperature setting range is 16~30℃ . Operation icon and set temperature is displayed.
(5)Auto mode
Under auto mode, the system, the system will select the operation mode (cooling, heating, fan) according to the change ot ambient
temperature. Operation icon, actual operation mode icon and set temperature will be displayed. There's 30s time delay for protection
for mode switchover. Protection function is same as that under each mode.
4.Display status of indoor indicator
(1)Display status of indoor unit
① After energization, all display icons will be displayed and then only the power indicator is on. When turning on the unit with remote
controller, the operation indicator is on and the current set operation mode will be displayed.
② During defrosting, the operation indicator will be on 10s and off 0.5s circularly. Under auto mode, the dual-8 nixie tube displays 25
under cooling mode or fan mode, and 20 under heating mode. Mode indicator is displayed according to the mode.
③ Dual-8 nixie tube displays set temperature.
(2)Error indicator display on indoor unit
Technical Information
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