Repair And Maintenance Of 300V Power Supply - VWR International 250V Instruction Manual

Ions in solution and at a given voltage will move faster as the temperature increases,
increasing current.
Power
The power in Watts, or the rate of heat generated by the system, is directly proportional to
voltage and current (W=IV).
Repair and Maintenance of 250V Power Supply
Introduction
The 250V Power Supply requires no periodic maintenance program with the exception of an
occasional dry wipe-down of the instrument.
Encountering Problems
1. Check the troubleshooting section.
2. Call Technical Service.
3. If the unit must be shipped back for repair, contact Labnet International or the distributor for
a Return Authorization Number and shipping instructions. The unit will be repaired as
quickly as possible and returned to you.
Replacing the Fuse
For additional fuses, contact VWR International Technical Service.
To replace the fuse:
1. Turn off the main power switch at the rear of the 250V Power Supply and detach the power
cord from the rear of the 250V Power Supply.
2. Open the fuse compartment located inside the Power Entry Module by inserting a small flat
blade screwdriver into the slot below the ON/OFF switch. Turn the screwdriver to gently
pry open the fuse compartment.
Note: The fuse compartment will not open with the power cord in place.
3. Pull the fuse holder out of the compartment and inspect the fuse. If the fuse is burned or
there is a break in the fuse element, replace the fuse with an identical type of fuse (4A/250V)
as provided in the fuse holder (see figure below).
4. Place the fuse holder back into the compartment.
5. Snap the cover closed.
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