UMI-B1 UL Series Inverter Safety precautions
3
• Do not carry the inverter by its cover. The cover may fall off.
• Install away from children and other public places.
• The inverter cannot meet the requirements of low voltage protection in IEC61800-5-1
if the altitude of the installation site is above 6562ft (2000m).
• The leakage current of the inverter may be above 3.5mA during operation. Ground
with proper techniques and ensure the grounding resistance is less than 10Ω. The
conductivity of PE grounding conductor is the same as that of the phase conductor
(with the same cross sectional area).
• R, S and T are the input terminals of the power supply, while U, V and W are the
motor terminals. Connect the input power cables and motor cables with proper
techniques; otherwise the damage to the inverter may occur.
1.3.2 Commissioning and running
• Disconnect all power supplies applied to the inverter before the
terminal wiring and wait for at least the designated time after
disconnecting the power supply.
• High voltage is present inside the inverter during running. Do not carry
out any operation except for the keypad setting.
• The inverter may start up by itself when P01.21=1. Do not get close to
the inverter and motor.
• The inverter can not be used as "Emergency-stop device".
• The inverter can not be used to break the motor suddenly. A
mechanical braking device should be provided.
Note:
• Do not switch on or off the input power supply of the inverter frequently.
• For inverters that have been stored for a long time, check and fix the capacitance and
try to run it again before utilization (see Maintenance and Hardware Fault Diagnose).
• Cover the front board before running, otherwise electric shock may occur.
1.3.3 Maintenance and replacement of components
• Only qualified electricians are allowed to perform the maintenance,
inspection, and components replacement of the inverter.
• Disconnect all power supplies to the inverter before the terminal
wiring. Wait for at least the time designated on the inverter after
disconnection.
• Take measures to avoid screws, cables and other conductive matters
to fall into the inverter during maintenance and component
replacement.
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