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116
F U N C T I O N T E S T S
4) Remove milk frother from platform.
5) Insert red test probe in central opening
of milk frother connector (ground con-
nection).
6) Press "measure" button.
7) Read off displayed insulation resis-
tance or test result.
8) Switch off test equipment.
9) Short red with black test probe to
make sure that test voltage is dis-
charged.
10) Fill in result in test report.
9.8.4 What to do if the insulation test fails
Risk of damage!
A sparkover can damage the electronic control board and sensors etc.
•
Assume that the coffee machine is defect after a failed insulation test.
•
Check wiring and locate fault. After fault clearance proceed with troubleshooting
check list (see page 42).
•
In case of doubt an insulation test on the milk frother alone can be carried out on the
coffee machine Citiz & milk: touch phase and neutral contacts at the bottom with one
test probe successively and the metallic upper part with the other test probe.
If insulation test fails, replace milk frother.
Citiz service manual
5.
7.
6.
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