Hi sir:
1)Please see first if the Input Voltage in his machine is stable, maybe you have 22oVac, ??? or 400Vac, Measure the tolerance for 10% up or down, when this happen, is very Urgently, that you must install STABIZER for the input of machine, otherwise, you must have a LOT of problem, like you have now.
However you can adjust the Primary TAP of main transformer of his machine.
2) Look LEDs for Card KAP
LED Voltage Fuse protection Application
V8 24V= F5 (4A) Supply of ADAD10 card X415.2 - X415.1
V9 45V= F7 (8A) Supply of PS10 X416.3/4 - X416.1/2
V10 24V= F4 (1.5A) Supply of MHS (knife upstroke control X416.12 - X416.11
V11 8V= F4 (1.5A) Supply of MHS (SAP02) X416.10 - X416.11
V12 25V= F8 (10 / 16A) Supply of solenoid valves X416.7/8 - X416.5/6
Look, for dirty, oxide, and loose Fuses( or contacts corroded) see the status LEDs in the instant that problem occur, o.k?
specially the LED V10+V11
Let me know, sincerely or send me his email.