Function of FFQ Series SiUS121502E54 Function and Control2. Function of FFQ Series2.1 Drain Pump Control2.1.1 Normal Operation The float switch is OFF in normal operation. When cooling operation starts (thermostat ON), the drain pump turns ON simultaneously. After the thermostat turns OFF, the drain pump continues to operate for another 5 minutes. The aim of residual operation after thermostat OFF is to eliminate the dew that condenses onthe indoor heat exchanger during cooling operation.2.1.2 If the Float Switch is ON with the Thermostat ON in Cooling Operation When the float switch turns ON, the thermostat turns OFF simultaneously. After the thermostat turns OFF, the drain pump continues to operate for another 5 minutes.∗1: If the float switch turns OFF again during the residual operation of the drain pump, coolingoperation also turns on again (thermostat ON).∗2: If the float switch remains ON even after the residual operation of the drain pump has ended,the error code A3 is displayed on the remote controller.∗3: The drain pump turns OFF once residual operation has ended, then turns ON again after 5seconds.∗4: After A3 is displayed and the unit comes to an abnormal stop, the thermostat will remain OFFeven if the float switch turns OFF again.Float switchError displayThermostat(running)ONOFFOFFONONOFFDrain pump ONOFF5 min. (R21088)ONOFFOFFONONOFFONOFF5 min.5 min. 5 sec. 5 sec. (R22380)Float switchError displayThermostat(running)Drain pumpA3}∗1 ∗2 ∗4∗3
