36
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Protective earth continuity test (2)
Test sequence (continued):
1. Connect black measuring cable to ground
pin of power plug with an alligator clip
(example shown: Swiss power plug).
2. Switch on test equipment and select
protective earth continuity test.
Symbolic illustration of test equip-
ment.
3. Touch thermoblock tube with tip of red test
probe.
4. Press "measure" button and read off
displayed resistance.
The resistance must be lower than
0.3 Ohm.
5. Fill in measured value in a test report.
Proceed with protective insulation
test before reassembling the
housing of the coffee machine.
What to do if the protective earth continuity
test fails
Check ground wire connection on thermoblock
(refer to wiring diagrams on page 27).
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