Control Specification (09/12 Class) SiUS04-70246 Function and ControlDetail I Judgment by power consumptionWhen an output frequency is exceeds 55 Hz and the input current is less than specified value, theadjustment is made for insufficient gas.II Judgment by discharge pipe temperatureWhen discharge pipe temperature is ∆36°F higher than target value and the electronic expansionvalue opening is 450 pulses (max.), the adjustment is made for insufficient gas.III Judgment by the difference of temperatureWhen the difference of the temperature is smaller than , it is regarded as insufficient gas.3.13 Forced Operation ModeOutline Forced operating mode includes only forced cooling.Detail Forced Cooling3.14 Additional Function3.14.1 Powerful Operation ModeCompressor operating frequency is increased to PI Max. (Max. Hz of operating room) and outdoorunit airflow rate is increased.3.14.2 Voltage Detection FunctionPower supply voltage is detected each time equipment operation starts.Cooling room temperature – indoor heat exchanger temperature ∆7.2°Foutdoor heat exchanger temperature – outdoor temperature ∆7.2°FHeating indoor heat exchanger temperature – room temperature ∆7.2°Foutdoor temperature – outdoor heat exchanger temperature ∆5.4°FItem Forced CoolingForced operationallowing conditions 1) The outdoor unit is not abnormaland not in the 3-minute stand-bymode.2) The operating mode of the outdoorunit is the stop mode.3) The forced operation is ON.The forced operation is allowed whenthe above “and” conditions are met.Starting/adjustment If the forced operation switch ispressed as the above conditions aremet.1) Commandfrequency 68 Hz2) Electronicexpansion valveopeningIt depends on the capacity of theindoor unit.3) Outdoor unitadjustment Compressor is in operation4) Indoor unitadjustment The command of forced operation istransmitted to the indoor unit.End 1) When the forced operation switch ispressed again.2) The operation is to endautomatically after 15 min.Others The protect functions are prior to allothers in the forced operation.
