EcoSmart ES50HVP Service Manual - page 10
Manual is about: HIGH VELOCITY AIR HANDLER
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If the calibrate procedure above fails to work, check if the silicone tube is clear and there is no
debris blocking the tube or the plastic inlet ‘T’ located on the centre plate. If the system still
does not work, then sensor is defective and the board needs to be replaced.
As a workaround until the board is replaced, set OPTIONS switch 4 to the off position and the
ecosmart will run in fixed airflow mode.