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8. Open locking lever and pull out capsule holder.
9. Touch marked screw inside of extraction head with test probe.
10. Press start button (C) and read off displayed resistance.
The insulation resistance must be higher than 2.0 Mega Ohm with a test
voltage of 500 VDC.
11. Switch off test equipment.
12. Unplug or discharge test probe for safety reasons.
If insulation test fails, a sparkover has damaged the coffee machine probably.
In such a case check the wiring, locate possible fault(s) and proceed with the trouble-
shooting check list.
Repeat the protective insulation test after the repair.
F I N A L I N S P E C T I O N S
C
Lumio service manual
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Table of Contents
Troubleshooting
