After a transport on the Compella™ Bariatric Bed, why will bed exit not arm?

After a transport on the Compella™ Bariatric Bed, why will bed exit not arm?
 

If the bed is equipped with power drive, you cannot use the scale nor arm bed exit if bed is in transport mode.  If the power drive wheel is lowered to the ground and you attempt to use the scale or bed exit, the “raise bed” indicator light on the control pod will flash and you will hear a triple beep alert.

To remove bed from transport mode, press and hold the “raise bed” indicator control on the pod, once the indicator light turns off, the scale and bed exit is ready for use.