In the Cassette air conditioner equipment the condensate drainage system (water generated during the refrigeration process) is composed of a
condensate pump and a level sensor located in the equipment tray. The two components are shown in the diagram beside the machine. Whenever the equipment is operating in the COOL or DRY mode the condensate pump must be running. When the HEAT mode is activated the pump will be switched off. The level switch has a normally closed contact, when the water reaches the upper level the contact will open by turning off the equipment and generating the alarm. To identify the cause for generating this alarm, the following items must be checked: Check that the tray is full of water;
- If the tray is not full check the operation of the level sensor,
forcing the movement of the buoy. The possible causes for the alarm to be generated
and the tray is empty are: internal level switch contact, float switch
level switch locked in the upper position, sensor cable connection failure
level on the plate;
- If the tray is full (as soon as the sensor is reporting correctly), check
if the pump is running. It is recommended to disconnect the hose at the outlet
pump and check for water flow;
- If there is water flow, check that the drainage network installation conditions
with regard to the head of the pump, the slope of the pipe and the net for various machines;
- if there is no flow of water check the pump supply and the connection between the
pump cable and plate;
