Nespresso Citiz & Co EF 488 - Manual (Page 147)

Citiz service manual 147
F U N C T I O N T E S T S
9.9.4 What to do if the insulation test fails
• 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 49).
• In case of doubt an insultation 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.
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 resist­
ance 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.
Risk of damage!
A sparkover can dam age the electronic control board and sensors etc.