Haier AS12GB3HRA, Service Manual

Page: 17 / 71

Functions and Control
Domestic air conditioner
7.1.3 Dehumidifying mode.
* temperature control range: 16---30
* temperature difference: 1
Control feature: send the dehumidifying signal to the outdoor system.
When Tr>Ts+2 , the compressor will be turned on, the indoor fan will operate at the set speed.
When Tr is between the Ts and Ts+2 , the outdoor system will operate at the high dehumidifying
frequency for 10 minutes and then at the low dehumidifying mode for six minutes. The indoor fan will
operate at low speed.
When Tr< Ts, the outsystem will be stopped, the indoor fan will be stopped for 3 minutes and then turned to
the low speed option.
All the frequency converses have a 1 difference.
* Wind speed control: Automatic:
When Tr Ts+ 5 , high speed.
When Ts+3 Tr< Ts+5 , medium speed.
When Ts+2 Tr< Ts+3 , low speed.
When Tr<Ts+2 , light speed.
If the outdoor fan stopped, the indoor fan will be paused for 3 minutes.
If the outdoor fan stopped for more than 3 minutes and the outdoor system still operates, the system will be
changed into light speed mode.
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.
Manual: When the sensor is off or Tr< Ts+3 , the manual operation can not be made. (obligatory automatic
operation.)
*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 dehumidifying).
When the compressor works continuously for 1/6 minutes (adaptable in EEPROM) and the temperature of
the indoor coils has been below zero centigrade for 10 seconds, the compressor will be stopped and the
malfunction will be recorded in the malfunction list. The indoor system will continue to run. When the
temperature of the indoor coil is raised to 7 , the compressor will be restarted again (the requirement of 3
minutes’ delay should be satisfied.)
* Coil protection (synchronic overheating protection) are installed for the four directions latch malfunctions
when dehumidifying.
* Timing system on/off function.
* Dormant control functio
n.
7.1.4 Heating operation mode.
* temperature control range: 16---30
* temperature difference: 1
* control feature: the temperature compensation is automatically added and the system will send the heating
signals to the outdoor system.
If Tr Ts+1
ć
, the outdoor compressor is turned on, the indoor fan will be at the cold air proof mode.
If Tr>Ts+1
ć
, the outdoor system is turned off, the indoor fan will be at the heat residue sending mode.
If Tr<Ts+1
ć
, the outdoor system will be turned on again, the indoor fan will be at the cold air proof mode.