Chapter 5 Power Activation and Operational Tests
PAGE 5-3
5-2 Items to be Checked When Activating the Equipment
Confirm that the indications on the indicator change as follows when the control power is activated.
If “ABN” is indicated at the upper stage of the indicator when the power is activated, please refer to
“Description/Cause of Abnormal State and Recovery Method” to eliminate the cause, ensure safety,
and then reactivate the control power.
Also, check the following safety precautions when activating the power.
<Safety Precautions in Reactivating the Power>
If the power is to be reactivated, be sure to wait for a waiting time (recommended: 1 minute) after the
power has been turned OFF and then turn ON the power. The following problems may occur if there is no
waiting time or if reactivation is performed in a short time.
･An abnormal current may flow to the primary power source circuit without operation of the rush current
prevent circuit and the circuit protector which protects the circuit may therefore be put in an interrupted
state.
･The Controller power source circuit may detect an error and automatically interrupt the circuit. As a
result, the power source circuit will not operate (remains OFF) even when the power is reactivated.
If the power cannot be reactivated, be sure to wait for 5 minutes or more after turning OFF the power and
then turn ON the power.
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