Gree GWH24KG-K3DNA6G - Outdoor Part; Parameter Compensation and Calibration

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Technical Information
Service Manual
Outdoor Part
1. Input Parameter Compensation and Calibration
①
Check the input parameter compensation function
As the instruction feature of split unit, concerning the comfortable, in heating mode, the indoor ambient temperature of compressor
stopping time is higher than preset temperature.
②
Check effective judgment controls of parameters
Effective judgment function of the outdoor exhaust temperature thermo-bulb
When conditions a and b are satised, the outdoor exhaust temperature thermo-bulb is judged not to be connected into place, the
mainboard of outer units will display failure of the outdoor exhaust temperature thermo-bulb (not connected into place), stop the unit for
repairing, and resume it by remote controls of ON/OFF.
2. Basic Functions
(1) Cooling Mode
①
Conditions and processes of cooling operation:
a) If the compressor is stop, and [T
preset
– (T
indoor ambient
– ΔT
cooling indoor ambient temperature compensation
)] ≤ 0.5°C, start up the unit for cooling, and start
to cooling operation;
b) During operations of cooling, if 0°C ≤ [T
preset
– (T
indoor ambient
–ΔT
cooling indoor ambient temperature compensation
)] < 2°C, the cooling operation will be still
running;
c) During operations of cooling, if 2°C ≤ [T
preset
– (T
indoor ambient
–ΔT
cooling indoor ambient temperature compensation
)], the cooling operation will stop after
reaching to the temperature point.
②
Temperature setting range
a) If T
outdoor ambient
≥ [T
low-temperature cooling
], the temperature can be set at: 16~30°C (Cooling at room temperature);
b) If T
outdoor ambient
< [T
low-temperature cooling
], the temperature can be set at: 25~30°C (Cooling at low temperature), that is, the minimum setting
temperature for outdoor unit judgment is 25°C.
(2) Dry Mode
①
Conditions and processes of dry operations: Same as the cooling mode;
②
The temperature setting range is: 16~30°C;
(3) Fan Mode
1. The compressor, outdoor fan and four-way valve are switched off;
②
The temperature setting range is: 16~30°C.
(4) Heating Mode
①
Conditions and processes of heating operations: (T
indoor ambient
is the actual detection temperature of indoor environment thermo-bulb,
ΔT
heating indoor ambient temperature compensation
is the indoor ambient temperature compensation during heating operations)
a) If the compressor is stop, and [(T
indoor ambient
–ΔT
heating indoor ambient temperature compensation
) –T
preset
] ≤ 0.5°C, start the machine to enter into heating
operations for heating;
b) During operations of heating, if 0°C ≤ [(T
indoor ambient
–ΔT
heating indoor ambient temperature compensation
) –T
preset
] < 2°C, the heating operation will be still
running;
c) During operations of heating, if 2°C ≤ [(T
indoor ambient
–ΔT
heating indoor ambient temperature compensation
) –T
preset
], the heating operation will stop after
reaching the temperature point.
②
The temperature setting range in this mode is: 16~30°C.
(5) Defrosting Control
①
After the time for defrosting is judged to be satised, if the temperature for defrosting is satised after detections for continuous
3minutes, the defrosting operation will start.
②
Start to defrost: Compressor stops and starts up 55S later;
③
Defrosting  nish: Compressor stops and starts up 55S later;
④
Conditions of  nishing defrosting
The defrosting operation can exit when any of the conditions below is satised:
a) T
outdoor pipe
≥ 12°C;
b) T
outdoor ambient
<-5°C, and the Toutdoor pipe≥ 6°C last more than 80S;
c) The continuous running time of defrosting reaches to 8min.
(6) Compressor Control