Jamesway Sentry Manual page 113

system functions while a machine is powered down) or the RTC (real time clock which keeps track of the
date and time) has experienced a failure. Each of the above is a computer chip with an integrated battery
located on the processor board (PTA410), whose expected life is approximately ten years without power.
To see if the NOVRAM is the cause, look at the setpoints or if the machine is no longer in profile mode
when it should be. If they appear to be incorrect then most likely the NOVRAM is at fault. If this is the
case and the alarm is only momentary the machine will be using default values. The profile then has to be
set up again. If the NOVRAM appears to be correct, then the real time clock could be the problem. Check
if the profile has changed to standby mode or if an incorrect day in cycle is used. If this is the case set the
date and time on the display panel and see if the problem occurs again. If this alarm is persistent then the
processor board (or chips) need to be replaced. This alarm can also indicate that the current time and date
between the machine controller and the master display panel differs by more than one (1) hour. Check the
date and time on the master display panel. Do a "Set Time" even if it is correct. This will make sure that all
machines have the current time.
NOTE: Changing the board or one of the chips will require that the sensor be recalibrated, profiles and
alarm setup to be reentered or copied from another machine. It is normal to get this alarm after a new
processor board is installed.
Sentry Control System 113