I HAVE A 23XL4142ED60 s/n0601 w/cutler hammer wye/delta starter and PIC II CONTROLS. Getting alarms 107,108 and 221 alarms. percentage over/under voltages and phase reversal. Voltages are steady fluctuating on display from 320 to 900 volts. Voltage inputs are steady @ ISM board. Checked connections and grounds, all ok. Is there a trouble shooting procedure for the ISM board or anything else i need to check? i couldn't find anything in the service bulletins. Thanks in advance HP