General Precautions - Read These First - Hitachi L100 Series User Manual

ii

General Precautions - Read These First!

General Precautions - Read These First!
WARNING: This equipment should be installed, adjusted, and serviced by qualified
electrical maintenance personnel familiar with the construction and operation of the
equipment and the hazards involved. Failure to observe this precaution could result in
bodily injury.
WARNING: The user is responsible for ensuring that all driven machinery, drive train
mechanism not supplied by Hitachi, Ltd., and process line material are capable of safe
operation at an applied frequency of 150% of the maximum selected frequency range to
the AC motor. Failure to do so can result in destruction of equipment and injury to
personnel should a single-point failure occur.
WARNING: For equipment protection, install a ground leakage type breaker with a fast
response circuit capable of handling large currents. The ground fault protection circuit is
not designed to protect against personal injury.
HIGH VOLTAGE: HAZARD OF ELECTRICAL SHOCK. DISCONNECT INCOM-
ING POWER BEFORE WORKING ON THIS CONTROL.
WARNING: Wait at least five (5) minutes after turning off the input power supply
before performing maintenance or an inspection. Otherwise, there is the danger of
electric shock.
CAUTION: These instructions should be read and clearly understood before working
on L100 series equipment.
CAUTION: Proper grounds, disconnecting devices and other safety devices and their
location are the responsibility of the user and are not provided by Hitachi, Ltd.
CAUTION: Be sure to connect a motor thermal cutoff switch or overload device to the
L100 series controller to assure that the inverter will shut down in the event of an
overload or an overheated motor.
HIGH VOLTAGE: Dangerous voltage exists until power light is off. Wait at least 5
minutes after input power is disconnected before performing maintenance.
WARNING: This equipment has high leakage current and must be permanently(fixed)
hard-wired to earth via two independent cables.
WARNING: Rotating shafts and above-ground electrical potentials can be hazardous.
Therefore, it is strongly recommended that all electrical work conform to the National
Electrical Codes and local regulations. Installation, alignment and maintenance should