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Control Specification
Detail
Judgment by Input Current
When an output frequency is exceeds 51 Hz (40 class) or 48 Hz (50 class) and the input current
is less than specified value, the adjustment is made for refrigerant shortage.
Judgment by Discharge Pipe Temperature
When discharge pipe temperature is higher than 101°C, the electronic expansion value opening
is 450 plus (max.) and the adjustment is made for refrigerant shortage.
3.12.4 Preventing Indoor Freezing
During cooling, if the heat exchanger temperature in the operation stopped room becomes
below the specified temperature for the specified time, open the electronic expansion valve in
the operation stopped room as specified, and carry out the fully closed operation. After this, if
freezing abnormality occurs more than specified time, the system shall be down as the system
abnormality.
3.13 Additional Function
3.13.1 POWERFUL Operation Mode
Compressor operating frequency and outdoor unit airflow rate are increased.
3.13.2 Voltage Detection Function
Power supply voltage is detected each time equipment operation starts.
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SiBE12-933_A
Function and Control
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