Hitachi CE50-10 Instruction Manual page 9

Type-D grounding (formerly type 3 grounding) is required to prevent electric shock, to maintain normal operation of
electronic circuits containing LSI, and to protect the unit from abnormal voltage due to lightening surge.
Turning off the power supply
Turn off the main power switch on the front of this unit. (See 3.3 Turning off the power to the CE50-10.
WARNING: Insulation failure or electric leakage might cause an electric shock. When using the unit, make sure that
the unit is grounded.
■ Regulations and countermeasures
Voluntary control of radio wave interference
This is a Class A product based on the standard of the Voluntary Control Council for Interference (VCCI). If this
equipment is used in a domestic environment, radio interference may occur, in which case the user may be required to take
corrective actions.
Countermeasures against instantaneous voltage drop in power supply
A defect might occur in this unit in the event of an instantaneous voltage drop in the power supply due to lightening. As
the countermeasures against instantaneous voltage drop of power supply, we recommend that you use an uninterruptible
AC power supply unit.
Preface
VII