07 Sundance Optima - Watchdog Mode

[fdegree]

I went out to test the water on my 2007 Sundance Optima and noticed a clear screen, except for a series of dashes (-----).  According to the owners manual, this is the watchdog mode.  If it senses something wrong, it will shut down and go into this watchdog mode.  I turned off the breaker to the tub for a couple of minutes, then turned it back on.  This seems to have cleared up whatever went wrong...for now.  But, this has spawned a couple of questions:

1.  Any idea what could have caused this?
2.  Is this a sign of more trouble ahead?

[Jacuzzi Jim]

 There are a number of things that could cause that error, if there is a problem it will come back, if not, could have just been the so called glitch.

[fdegree]

Thanks, I appreciate the response.