Got a funny alarm that has surfaced. It only happens on occasion but, at times after I get on pad, I will get an alarm of 10 to 15 beeps then it will stop. After about 10 seconds, it will come back but will not stop until I turn the motor off. Each beep is approx. one second apart from each other. The motor has been hooked up to a data analyzer and no alarm codes are being reported. Any ideas?