11-4
CONTROL SYSTEM
SM HDDHED 1-A.1 GB
IFAN
OFAN
ON
OFF
ON
ON
COMP
OFF
ON
OFF
ON
OFF
>=3min
>=6min
>=6min
SPT
SPT-2
RAT
30s
30s
11.3.1
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 11.1.4
11.4 Heat
Mode
If RAT<SPT+1.5 AND for certain peiod, 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 RAT
≥
SPT+1.5, the compressor will stop, the outdoor fan will delay 30s to stop and the indoor fan
will blow for 60s at setting speed. During this period, the fan speed can’t be switched.
IFAN
OFAN
ON
OFF
ON
Set Speed
COMP
OFF
ON
OFF
ON
OFF
>=3min
>=6min
>=6min
SPT+1.5
RAT
30s
30s
ON
RV
Set Speed
Anti-cold function
Max 3 min
60s
60s
* 1
Remark: *1
–
accumulated time of RAT<SPT+1.5
11.4.1
Indoor Fan Control in Heat Mode
Indoor fan speed depends on the indoor coil temperature
Anti-cold air function
When starting the heating mode, anti-cold air function will be activated and indoor fan can run at low
speed or stop running. This function will terminate after the unit runs for 3min or the ICT reaches 42
degree.
Residual heat blowing function
During heating, when the stopping condition for the compressor is reached, the compressor and the
outdoor fan motor stop running while the louver moves to position L. The indoor fan will stop after
running for 60s at setting speed.
