Haier H2SM-(9+12)HV03/R2 Service Manual page 39

1. Operation Mode
1. Automatic operation
When the system is under the automatic operation option, the appropriate operation mode will
be decided according to the differences between the preset temperature and the indoor temperature
after the system starts up. Then, the system will operate according to the chosen mode. In the
following conditions, Tr stands for indoor temperature and Ts stands for outdoor temperature.
The system will choose the operation mode according to the following conditions when entering
into the automatic operation option for the first time.
Tr¡ Ý Ts-3¡ æ
Tr£ ¼ Ts-3¡ æ
Under the automatic option, the system will switch between the cooling and warming modes
according to the change of the indoor temperature. If the air conditionic is under the cooling mode,
when the preset temperature for stopping the compressor is reached, the compressor will be stopped.
The indoor temperature will be tested again 15 minutes after the stop of the compressor. At the
moment, if the tested temperature is under the Tr£¼ Ts-3¡æ condition, the system will be switched into the
warming mode. If not, the system will remain in the cooling mode. If the air conditionic is under the warming mode,
when the preset temperature for stopping the compressor is reached, the compressor will be stopped.
The indoor temperature will be tested again 15 minutes after the stop of the compressor. At the
moment, if the tested temperature is under the Tr£¾ Ts+8¡æ condition, the system will be switched into the
cooling mode. If not, the system will remain in the warming mode.
2. Cooling operation mode
Temperature control range: 16¡ æ ---30¡ æ
Temperature difference: ±1¡ æ
* Control features: When Tr£ ¨ input airflow£ © >Ts£ ¨ set temperature£ © ¡ æ
opened,the indoor fan will operate at the set speed and the mode signal will be sent to the outdoor
system. When Tr£ ¨ input airflow£ © < Ts£ ¨ set temperature £ © ¡ æ
fan will operate at the set speed and the mode signal will be sent to the outdoor system. The system
will keep the original status if Tr= Ts.
Airflow speed control: (temperature difference 1¡ æ )
Automatic: When Tr>=Ts+3¡ æ , high speed.
When Ts+1¡ æ =<Tr<Ts+3¡ æ , medium speed
When Tr<Ts+1¡ æ , low speed
When the sensor is off, low speed
When the airflow speed has no delay from the high to low switching, the speed should be delayed
for 3 minutes (remain at high speed for 3 minutes.) before the next switch.
Manul: When the system is operating, you can set the high, medium or low speed manually. ( When
the sensor is on or off, the system will change the speed 2 seconds after receiving the signal.)
*Airgate location control: the location for the airgate can be set according to your needs.
*Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling or
demoisture). When the compressor works continuously for 5 minutes (adaptable in EEPROM) and the
temperature of the indoor coils has been below zero centigrade for 10 seconds, the compressor will
Air Conditioner
Choose the cooling mode
Choose the warming mode
34
, the outdoorunit will be
, outdoorunit will be closed,the indoor
Edition:2006/1/10