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2.3 Safety Precautions
Step 1.
Stop motor.
Step 2.
Disconnect AC line power, permanent magnet type motors, and remote
DC link power supplies, including battery backups, UPS, and DC link
connections to other adjustable frequency drives.
Step 3.
Wait for the capacitors to discharge fully before performing any service
or repair work. The duration of waiting time is specified in Table 2.1.
HIGH VOLTAGE!
Adjustable frequency drives contain high voltage when connected to AC line
power input, DC power supply, or load sharing. Failure to perform installation,
start-up, and maintenance by qualified personnel can result in death or serious
injury.
•
Installation, start-up, and maintenance must be performed by qualified
personnel only.
UNINTENDED START!
When the adjustable frequency drive is connected to AC line power, the motor
may start at any time, causing risk of death, serious injury, equipment, or prop-
erty damage. The motor can start by means of an external switch, a serial bus
command, an input reference signal from the LCP, or after a cleared fault con-
dition.
•
Disconnect the adjustable frequency drive from line power whenever
personal safety considerations make it necessary to avoid unintended motor
start.
•
Press [Off] on the LCP before programming parameters.
•
The adjustable frequency drive, motor, and any driven equipment must be in
operational readiness when the adjustable frequency drive is connected to
AC line power.
DISCHARGE TIME!
The adjustable frequency drive contains DC link capacitors that can remain
charged even when the adjustable frequency drive is not powered. Failure to
wait the specified time after power has been removed before performing ser-
vice or repair work could result in death or serious injury.
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