Challenge Portable AC Error Codes
E2– Evaporator temperature sensor error- Unplug the unit and plug it back in. If error repeats, call for service.
E4– Display panel communication error- Unplug the unit and plug it back in. If error repeats, call for service.
Protection codes:
P1– Bottom tray is full – Connect the drain hose and drain the collected water away. If error repeats, call for service
NOTE: When more than one codes occur, the priority of the code display order is: E4–E2–E1–P1.
Unit does not Start when Pressing on/off Button
– P1 appears in the display window/Drain the water in the bottom tray.
– Room temperature is lower than the set temperature.(Cooling mode)/Reset the temperature.
Not cool enough
– The windows or doors in the room are not closed./Make sure all the windows and doors are closed.
– There are heat sources inside the room./Remove the heat sources if possible.
– Exhaust air duct is not connected or blocked./Connect the duct and make sure it can function properly.
– Temperature setting is too high./Decrease the set temperature.
– Air filter is blocked by dust./Clean the air filter.
