Operating Safety Precautions - Toshiba VFS5 Series Operation Manual

1)
D A N G E R
LED (see page 24 for location) is no longer illuminated. Charged capacitors can present a
hazard even if source power is removed from the drive.
2) DO NOT OPERATE THIS UNIT WITH ITS CABINET DOOR OPEN.
3) Do not touch the heatsink while unit is in operation. Serious burns could result.
4) Only properly trained and qualified personnel should be allowed to service or have access to
the adjustments and operation of this equipment. They should be familiar with operating motor
drives and with the driven machinery. See page 5.
5) Follow all warnings and precautions and use care not to exceed equipment ratings.
6) Do not power up the drive before completely reviewing this manual.
7) The input voltage must be within +/-10% of the specified input voltage. Voltages outside of this
permissible tolerance range may cause internal protection devices to turn on or can cause damage
to the drive. Also, the input frequency should be within +/-2 Hz of the specified input frequency.
8) Do not use this drive with a motor whose rated input is greater than the rated drive output.
9) Do not apply commercial power to the drive output terminals T1 (U), T2 (V), or T3 (W) even if the
source power is off. Disconnect the drive from the motor before applying bypass voltage to the motor.
10) Interface problems can occur when this drive is used in conjunction with some types of process
controllers. Signal isolation may be required to prevent controller and/or drive malfunction
(contact Toshiba or the process controller manufacturer for additional information about compatibility
and signal isolation).
11) Do not open and then re-close a secondary magnetic contactor (MC) between the drive and the load
unless the drive is OFF (output frequency has dropped to zero) and the motor is not rotating. Abrupt
re-application of the load while drive is on or while motor is rotating can cause drive damage.
12) Use caution when setting output frequency. Overspeeding a motor can decrease its torque-
developing ability and can result in damage to the motor and/or driven equipment and can
result in serious personal injury.
13) Use caution when setting the acceleration and deceleration time. Unnecessarily short times can
cause tripping of the drive and mechanical stress to loads.
14) If the drive produces smoke, odor or abnormal noises, turn off input power immediately and request
service.
15) If the drive will be inactive for a long period of time, turn off the input power.
TOSHIBA

Operating Safety Precautions

C A U T I O N
Do not touch any internal part with power applied to the drive;
first remove the power supply from the drive and wait until charge
11