Control Specification SiBE01-82924 Functions and Control3. Control Specification3.1 Four Way Valve SwitchingOutline Current is conducted during heating operation, and current is not conducted during cooling ordefrosting. In order to eliminate the switching sound (as the four way valve coil switches fromON to OFF) when the heating is stopped, the delay switch of the four way valve is carried outafter the operation stopped.Detail The four way valve is switched 150 sec. after the compressor stops.3.2 3-Minute StandbyProhibit to turn ON the compressor for 3 minutes after turning it off.(except when defrosting)3.3 Compressor Protection FunctionWhen the compressor turns ON, it keeps running at least 180 sec..(except when defrosting)3.4 Freeze-up Protection ControlOutline During cooling/dry operation, freeze-up protection control is activated according to thetemperature of the indoor heat exchanger to prevent it freezing.Detail Conditions for starting Temperature of the indoor heat exchanger ≤ 1°C for 1 min. or more Compressor running time ≥ 10 minutesWhile controlling The compressor halts.Conditions for ending Temperature of the indoor heat exchanger ≥ 10°C for 1 min. or moreor The operation stops.
