Eppendorf 3100 Digital Water Bath Shake - Manual (Page 30)

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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 rear of the unit. 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 Shakers are set to the appropriate line voltage prior to shipment. The voltage
selector switch (see Figure 2 or 6), however, is a universal power-entry device which
can be reset to adapt to worldwide power requirements.
If it becomes necessary to set the unit to a different voltage, use the following
procedure.
1. Set the ON/OFF switch (located on the right side of the unit) 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.
7. Plug the power cord into the power cord connection on the unit and the power
source.
8. Set the ON/OFF switch to the ON position. The unit is ready for operation.
WARNING!
None of the following procedures should be attempted by
anyone who is not a qualified Service Engineer or Technician.
The ON/OFF switch must be turned off and the power cord
disconnected prior to beginning any of these procedures.