Changing Fuses; Changing Voltage - NEW BRUNSWICK SCIENTIFIC Innova 4300 Manual To Operations

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WARNING!
None of the following procedures should be attempted by
anyone who is not a qualified Service Engineer or Technician.
5.3

Changing Fuses

The unit is designed with a circuit breaker, which is used as an ON/OFF switch.
There are two fuses on the left side of the unit (see Figure 3). One is to protect the
control circuitry and the other is to protect the motor circuit. The motor circuit fuse is
mounted in the center of the voltage selector switch.
To remove either fuse:
1. Insert a small, flat-bladed screwdriver and turn counter-clockwise until it
disengages and the fuse holder springs free.
2. Check the fuse. If it has failed, replace it with a like fuse as identified in the Spare
Parts List (see Section 5.13). Spare fuses are supplied with the unit.
5.4

Changing Voltage

Innova 4300 is set to the appropriate line voltage prior to shipment. The voltage
selector switch (see Figure 3), however, is a universal power-entry device which can
be reset to adapt to worldwide power requirements.
If it becomes necessary to set to a different voltage:
1. Set the ON/OFF switch (see Figure 1) to OFF.
2. Disconnect the unit from the power source.
3. Using a small, flat-bladed screwdriver, rotate the center portion of the switch until
the fuse is disengaged. Remove the fuse.
4. Using a larger flat-bladed screwdriver or a small coin, rotate the center portion of
the switch to the desired voltage. The indicator is at the top of the switch.
5. Replace the fuse and holder.
6. Check that the proper power cord is available for the voltage selected.
INNOVA 4300 • M1193-0050
User's Guide