Welbilt Merrychef eikon e1s - High Voltage Capacitor Test

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eikon e1s
Service and repair guide
High Voltage Capacitor test
Ensure the following requirements have been met before starting the test:
• The appliance has been disconnected from the power supply and protective measures have been taken to ensure
the power cannot be switched on again.
• The appliance is cool.
• The high voltage capacitors are discharged before commencing work.
• Anti-static precautions have been taken.
• The casing of the appliance has been removed.
• High voltages and large currents are present at the high voltage capacitor.
• It is very dangerous to work near this part when the oven is on.
• NEVER make any voltage measurements at the high voltage circuits, including the magnetron filament.
1.
Remove all electric connections from the high voltage capacitor.
2.
Using a Digital Multi-Meter (DMM), check for continuity:
Results should be as follows:
• Connect the DMM to both terminals of the high voltage capacitor.
• The test is passed if the DMM display reaches approx. 10 MΩ.
• Connect the DMM to one terminal and the metal outer case of the
high voltage capacitor.
• The test is passed if the DMM display reads "open circuit".
• Repeat the test for the other terminal and the metal outer case.
• Using the DMM, test the insulation resistance between both
terminals and the metal outer case of the high voltage capacitor.
• The test is passed if the megger display reads over 100 MΩ.