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11.2 Heating Operation
11.2.1 Outdoor fan control
When heating operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted
according to figure below:
RPM controlled
53.6°F
RPM free
57.2°F
OD temp.
To improve the judgment accuracy, indoor room temperature sampling starts when any indoor unit has stopped
capability supplied (heating thermo-off) during heating operation with compressor ON, outdoor unit will send
signal to all thermo-off indoor units to ON fan motor and get room temperature sample.
To prevent discharge temperature drop at indoor units which is ON when sampling the room temperature of
heating thermo-off units, the outdoor fan speed will be adjusted accordingly.
However, if indoor room temperature is high compare to remote control setting temperature, sampling of
corresponding indoor unit will be cancelled.
11.2.2 Powerful Operation 1
During cooling operation, this control is to concentrate outdoor unit capability to the powerful operation enabled
indoor unit by temporary stop the capability supply to low load demand indoor units.
Operation start condition:
o
Powerful operation ON for targeted indoor unit
Operation
content:
o
If other indoor units (where Powerful operation are OFF) achieve setting temperature continuously for
1 minute after received powerful command from indoor unit, then capability supply to other indoor units are
stopped for minimum 3 minutes.
Capability supply stop period follows powerful operation period.
Operation stops when comply either one of the following conditions:
o
When other indoor units (where Powerful operation are OFF) is lower than setting temperature.
o
When the powerful operation is OFF for all indoor units.
o
When Quiet operation received from 1 indoor unit.
o
When protection control starts.
11.2.3 Powerful Operation 2
During cooling / heating operation, this control is to provide fast cooling / heating operation compare to normal
operation.
Operation start if all condition below are complied:
o
Powerful operation ON for indoor unit.
o
Not under Annual Cooling control.
Operation
content:
o
Outdoor fan speed will adjust automatically.
o
Compressor
frequency
will adjust automatically.
Operation stop when comply either one of the follow conditions:
o
When the powerful operation is OFF for all indoor units.
o
When annual cooling control activated.
