Manitowoc Merrychef eikon e2s, Service And Repair Manual

Page: 114 / 193

10 Tests
eikon e2s Service and Repair Manual UL 114
High Voltage Diode 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.
1. Remove all connections from the high voltage diode.
2.
Using a megger, test for continuity in both directions.
Results should be as follows:

Open circuit both ways - FAIL

Conducts one-way only - PASS

Short circuit both ways - FAIL

Conducts one way, leaks the other - FAIL
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:
3. Connect the DMM to both terminals of the high voltage capacitor.
The test is passed if the DMM display reads approx.
10 MΩ.