Prodigio service manual Version 1.0 en
92
FUNCTION TESTS
8.7.4 What to do if the insulation test fails
• Assume that the coffee machine is defect after a failed insulation test.
• Check thermoblock, especially connections.
• Check temperature sensor (NTC).
• Check wiring and locate fault. After fault clearance proceed with troubleshooting
check list (see page 36).
• In case of doubt an insulation test on the milk frother alone can be carried out:
• Remove milk frother from swivel arm.
• Touch phase and neutral contact spring at its bottom with one test probe succes-
sively and the metallic upper part of the jug with the other test probe.
• If insulation test fails, replace milk frother.
Do not damage
inside coating of
milk frother jug
with the probe tip.
5) Place milk frother back on Otter con-
nector.
6) Touch upper metallic part of milk
frother with red test probe.
7) Press "measure" button.
8) Read off displayed insulation resist-
ance or test result.
The insulation resistance must be
always higher than 300 kOhm
(300’000 Ohm).
9) Switch off test equipment.
10) Short red with black test probe to
make sure that test voltage is dis-
charged.
11) Fill in results in a test report.
Risk of damage!
A sparkover can damage the electronic device etc.
To Next Page
Loading...
