CONTROL SYSTEMS
If SPT-2＜RAT＜SPT, the unit will maintain the previous status.
For model 18 and 24
If RAT≥SPT-0.5, the unit starts cooling operation. In this case, the compressor and outdoor fan will
operate and the indoor fan will run at the setting speed.
If RAT≤SPT-2, the compressor will stop operation and the outdoor fan will delay 30 seconds to stop.
While the indoor fan will run at the setting speed.
If SPT-2<RAT≤SPT, the unit will maintain the previous status.
12.3.1 Indoor Fan operation under Cool Mode
When SPT-RAT<0, if indoor fan motor operates at high speed, the fan motor will operate at medium
speed. The medium speed or low speed will be maintained; (this condition should be executed
when compressor starts up); this function will be excluded in the super high speed; When (RAT-
SPT) ≥1 , the fan will return to the setting fan speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the SPT and RAT,
rerfer to 12.1.6
12.4 Heat Mode
For Model 09 and 12
If RAT≤SPT+2, the unit will operate in heating mode. The compressor, outdoor fan and 4-way valve
will operate and the indoor fan will delay 3min to start at the latest
If SPT+2≤RAT≤SPT+5,the unit will maintain the previous status.
If RAT≥SPT+5, the compressor will stop, the outdoor fan will delay 30s to stop and the indoor fan
will blow for 60s at the setting speed. During this period, the fan speed can’t be switched.
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