Funcitions And Control - Haier H2SM-(9+12)HEK03/R2 Service Manual

5. Funcitions and Control

Note: See the list of functions for the functions applicable to different models.
5.1.1 Automatic running
the running mode according to the current room temperature and then will run according to the
determined mode. Tr in the following selection conditions means room temperature, Ts means setting
temperature, Tp means temperature of indoor coil pipe
Tr<23°C
After turning to the automation mode, the running mode can be switched between cooling mode, fan
mode and heating mode according to the change of the indoor ambient temperature. But the automatic
conversion between cooling mode and heating mode must be conducted after 15 minutes.
5.1.2 Indoor temperature control
Temperature control range: 16°C---30°C
Temperature difference: ±1°C
Compressor can't be controlled by temperature sensor within 2 minutes after it starts
1.Cooling mode:
When Tr< Ts, outdoor fan motor and compressor off, and when Tr > Ts, outdoor fan motor and
compressor are working again .If Tr=Ts, the indoor fan motor , outdoor fan motor and the compressor's
state will not change.
2.Heating mode:
in cold blast avoidance mode, and 4°Cof compensation is added after compressor is started.
When Tr>Ts+5°C, compressor is off, and the indoor fan motor runs as in cold blast avoidance
mode.
When Tr<Ts+5°C, compressor, four-ways valve and outdoor fan motor is on, and the indoor fan
motor runs as in the mode of avoiding cold blast.
The compressor, outdoor fan and indoor fan will run as per the following working pattern so as to realize
1) Tr> Ts+2°C, compressor, outdoor fan run continuously, indoor fan runs as per setting wind speed (State
1);
at the stand-by time of 3 minutes (State 2)
3) Tr <Ts, compressor, outdoor fan ceases, indoor fan runs in lower wind speed. (State 3)
H2SM-(9+12)HEK03/R2
Choose the warming mode
11
Funcitions and Control
Domestic Air Conditioner