Ricoh Di-C1.5a Manual page 86

Mechanical counter (NA only)
After you install the mechanical counter and
enable it with SP 5987, then SC611 occurs if you
try to remove it. This is to prevent falsification of
the counter setting.
Key counter interface
Scanner anti-condensation heater
Tray heaters (main unit, optional paper tray units)
Slide 86
If there is time, install these items.
Other Options
86
Di-C1.5 Training