Harbor Point HF-25GW/GX1b Installation, Operation And Maintenance Manual page 26

Remote Control Operation
Air conditioner running light
Digital display
It can show set point temperature, fixed time
or malfunction code.
OPERATION SECTION FOR
HF-51/HF-70 & HFR-51/HFR-70
Fan speed indicator
In high speed, three indicators are lit.
In middle speed,two indicators are lit.
In low speed, one indicator is lit.
Note: The indicator may change, this does not affect the operation.
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When timer is set this light is lit.