METREL MI 3399, Instruction Manual With Exercises

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Electrical Safety and Quality ApplicationTrainer - Introduction MI 3399
18
If the MI 3399 still will not start check the rest of the installation to see whether
conductors L and PE are also switched.

Before any radical changes are made on the socket, first check if the circuit breaker
at the bottom of the error switch box is switched on. If not, turn it on and check the
lights again. If the MI 3399 still does not work, check the installation.
This will enable that the protection circuit is working correctly.
4.3 Front panel
Figure 4-3: Front panel.