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8.3. Function test of main switch
Please turn the main switch (label QB1) off. Wait until all LEDs of the stacks are turned off.
Then turn the switch again on.
Figure 78: Function test of main switch
8.4. Verification of protective measures
In order to execute this check, turn off the main switch (label QB1, see figure above) and
keep a digital multimeter at hand.
Attention