4.6 Switching off the power supply
WARNING
When turning off the main switch in automatic mode:
Serious combustion faults leading to serious accidents are possible.
Before turning off the main switch:
❒ Switch boiler off by tapping “Boiler OFF”
➥ The boiler follows the shutdown procedure and switches to "Boiler
off“ status after the cleaning cycle
❒ Turn off the main switch
➥ Boiler controller is switched off
➥ The components powered via the control cabinet are powered down
➥ CAUTION: the expansion switch cabinet, which has its own power supply, is
still live.
NOTICE! Frost protection function is no longer active!
Operating the System
4
Switching off the power supply
Operating Instructions T4e | B1560520_en 47
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