To remedy, take e.g. a bias in 1x1 and let it readout. Change the binning back to 1x2, take a bias and check that the red readout bar does not extend below the bottom of the image. If it does, revert to 1x1 and repeat.
'''2. Filter Wheel ''' – It is necessary to initialise the filter wheel before changing filters; do this every time as follows:
In the Spectrograph Control Panel, click the “Util” button in the top left corner. In the pop-up Utilties window, click Filter Wheel “Init”.
In the Filter Wheel section of the Spectrograph Control Panel, ensure that the green indicators are lit for both “Ref” and “Centered”. If not, repeat previous step but click “Reset” then “Init”.