INVERTEC V300-I
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F-35
TROUBLESHOOTING & REPAIR
auxiliary in the Reconnect Panel. Pre-
charge sampling of the Capacitor(s) also
controls for overvoltage via the Driver
Board.
MATERIALS NEEDED
•
Analog voltmeter/ohmmeter (multimeter)
•
V300-I wiring diagrams
NOTE: Figure F.28 shows the Overvoltage
Protection DC Trigger Circuit.
CIRCUIT DESCRIPTION
Overvoltage protection occurs through two
circuits. The Protection Board monitors the
voltage applied to the Input Filter
Capacitors. If an overvoltage is sensed
from conditions such as misconnections or
line surges, the Output Trigger Circuit and
the Input Power Relays are opened, caus-
ing the machine to shut down. In the event
that line surges occur, the circuit will reset
when the line voltage returns to normal.
Misconnection protection includes the
Protection Board function along with a fused
ELECTRIC SHOCK can kill.
Observe all safety precautions detailed
throughout this manual.
– Perform input filter capacitor discharge
procedure.
WARNING
OVERVOLTAGE PROTECTION DC TRIGGER CIRCUIT TEST
Always turn off power to the machine to change the position of the reconnect switch. Never
change the reconnect switch with the main line switch in the on position. this will severely dam-
age the machine.
CAUTION