C&K 2316 Panel; Watchdog Reset

[chasbo@xxxxxxxxx]

The 2316 panel has a "Watchdog" circuit  The circuit board also has an
LED labeled Watchdog.

My question is:  What does the Watchdog watch?  What is it about the
panel that requires it to reset itself -- and send us a "watchdog
reset" signal?

My concern is a customer who is complaining that he peridoically finds
the SERVICE light on for no apparent reason.  He then shuts off the
light by entering *1#, the resetting function.

The SERVICE light, when lighted, indicates the precise problem by
flashing slow or fast, or in unison with another light on the keypad.
Matching the condition with a chart in the manual determines the
problem.

When the SERVICE light flashes slowly (no other lights flashing or on
steady) the keypad manual says that the cause is "Panel has reset
itself.  System OK.  To reset SERVICE light, press *1#."

I am unable to find any documentation that explains why the system is
resetting.  Resetting from what?

Charles