Haier AB25S2SC1FA Service Manual page 119

1.3.6 Control for discontinuous operation
After the unit starts up in cooling/heating mode, in 5 minutes, the compressor run/stop will not be controlled by
the room temp., but after changing the set temp., if compressor stop condition can be met, the system will stop
compressor immediately.
1.3.7 Anti-cold air control
In heating mode, after compressor startup, the system will control indoor fan motor according to indoor coil
temperature. Detailed operation is as below:
Tc2(℃)
Note:
1) The data in the parentheses is the control point when Tao>10oC;
2) Indoor unit will send "pre-heat" signal to wired controller in anti-cold air period.
1.3.8. Fan motor control in defrosting
A. On receiving outdoor defrosting signal, indoor unit will stop after blowing remaining heat at slow speed for 20
seconds.
B. In defrosting period, indoor fan motor stops running.
C. Defrosting is over, and indoor motor will run as anti-cold air state.
1.3.9 Blowing remaining heat operation
When the unit shuts off in heating mode or the thermostat is OFF, indoor motor will stop running after running at
low speed for 30 seconds.
1.3.10 Swing motor control
Indoor unit will control the swing motor according to the swing signal from the wired controller.
Full OFF 54 º
1.3.11 Water pump control
A: Water pump will be electrified when indoor unit enters non-heating mode until indoor unit stops. 5 minutes
later after indoor unit stops, water pump will stop.
B: When indoor unit is in heating mode, water pump will not operate.
C: In OFF state and in any mode, once float switch signal is measured, indoor unit will send OFF signal to
outdoor and send the failure code of drainage system to the wired controller, then the water pump will work until
the float switch signal is cancelled. After water pump is forced to run for 5 minutes, indoor unit will be back to
normal state.
30(32) set speed
26(30) low speed
22(26) off
20(20)
54°
Swing range
Standard position in
HEAT, COOL mode
0°
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