4-2
4.2
Precautions at the time of starting the fan
(1) Turn ON and OFF the power switch once or twice and make sure that the fan generates no
unusual noise or vibration during operation.
Check the rotational direction of the fan at this time, too.
If the fan rotates in the reverse direction, swap two of the three wires of the power supply
cable.
Warning
Be sure to turn off the main power before changing the wiring of the
fan.
Otherwise it may lead to an electric shock.
(2) Turn on the power, and watch the unit closely until it reaches full speed.
At that time, carefully check for unusual noise, vibrations, current, or any other abnormal
condition. In addition, check that the motor current value is normal.
(3) Place an operator in advance so that the fan can be turned OFF immediately after the
instructions of the person in charge of the operation.
Warning
Do not operate the fan if it is not running properly, for example if it is
making a strange noise. Contact a specialist company or the service
company designated by the manufacturer.