The ROC-2015 is rated for extreme cold, but the manual clearly states the operating limits for the LCD display (if equipped). If you are working in Northern Alberta in January, check the "Ambient Temperature Limits" section—it explains why the screen goes blank until the internal heater (if installed) kicks in.
: Typically 5A/250V AC for high-pressure pumps and inlet valves. roc-2015 controller manual pdf
Understanding what each button does is crucial. The manual should have a layout of the remote and explain the functions of each button. The ROC-2015 is rated for extreme cold, but