Function - Haier Smart Power Series Service Manual

6. Function

Indoor unit
6.1
6.1.1 Dehumidification operation (no humidity sensor )
1. Indoor unit will stop and send a stopping signal to outdoor unit when Tai<16°C.
2. Indoor unit will running cooling mode and send a cooling mode to outdoor unit when Tai>Tset+2°C.
3. When Tset<Tai≤Tset+2°C,indoor unit send a dehumidification mode signal to outdoor unit. Indoor unit run 10
minutes in low speed, and stop 6 minutes, the S-Code=0, alternate running. When it stops it will send stopping
signal to outdoor. When indoor unit failure, it will run 10 minutes in low speed and stop 6 minutes. Timing cycle
keep the same. Slave units determine the fan speed through the state what outdoor sent.
4. When the room temperature less than or equal to setting temperature, the indoor unit blow low speed and sent a
stopping signal to outdoor unit.
6.1.2 Auto running:
For cooling only units, auto running only have two modes: cooling and blowing.
1. First time to enter auto running mode, the running mode is decided by outdoor mode, room temperature and
setting temperature: If outdoor units have been running, it will run according to outdoor units mode (only for multi
mode) . Or when Tai ≥ Tset, it will enter auto cooling mode. When Tai < Tset, it will enter auto heating mode.
2. Auto cooling mode is same to cooling mode. The unit will enter auto heating mode if Tai+1+Tdif<Tset after
temperature sensor off 15 minutes. Or it will still stay on cooling mode, and will stop after reaching the setting
temperature.
3. Auto heating mode is same to heating mode. The unit will enter auto cooling mode if Tai≥Tset+1 +corrected+Tdif
after temperature sensor off 15 minutes. Or it will still stay on heating mode.
4. This mode has sleep function. In cooling mode it will enter cooling sleep, the same to heating. Once set sleep
function, the unit will no longer change mode after reaching setting temperature and stopping 15 minutes.
5. Cooling and heating mode transformation only can be carried out in 15 minutes after compressor stopping. Slave
units determine the fan speed through the state what outdoor sent.
6.1.3 Indoor fan control
1. Auto fan speed control
Cooling mode ΔT=Tai-Tset ; heating mode ΔT=Tset-Tai
*First time to enter auto wind mode, when ΔT>2, choose high speed; ΔT≤0, choose low speed, another choose
middle speed. If temperature sensor is off ,choose low speed. (1 degree transformation temperature difference)
When the speed mode is auto high speed, if ΔT<2, the speed mode will change to auto middle speed.
When the speed mode is auto middle speed, if ΔT<0, the speed mode will change to auto low speed; if ΔT>3, the
speed mode will change to auto high speed.
When the speed mode is auto low speed mode, if ΔT>1, the speed mode will change to auto middle speed.
The speed transformation under auto speed mode: It will delay 3 minutes from high speed to low speed and no
delay from low to high.
Salve units determine the fan speed according to the state what outdoor has sent in the auto speed mode.
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Smart Power