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Only professional technicians are allowed for installation and
maintenance.
Installation in any damp, condensed-phase environment with
inflammable and explosive gas is forbidden.
When the product is being installed or maintained, the power
must be switched off.
You are prohibited from touching the conductive part when
the product is operating.
Safety Warning
This is the general warning sign. It is used to alert the user
to potential hazards. All safety messages that follow this
sign shall be obeyed to avoid possible harm.