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3. TROUBLESHOOTING
3.2 Troubleshooting
II - 20
(1) Problems related to the power supply
The power does not turn ON.
Cause Remedy
The door interlock is applied. If the control panel door is not completely closed, close it. If
the door interlock is applied even when the door is closed,
the door interlock circuit is damaged.
The external power supply's input
voltage is not as specified.
Check that the input voltage is within 200 to 230VAC +10
to –15%.
The external power supply is
faulty.
Check that the power can be turned ON with the external
power supply only.
Note) Depending on the external power supply, the power
may not turn ON in the no-load state, so install a
slight load and check.
The external power turns ON but the NC control power does not turn ON.
Cause Remedy
The external power supply output
is not correct.
Disconnect the cable between the NC unit and the external
power supply, and check that the external power supply
output is normal.
The power cable is disconnected
or broken.
Check the cable connected between the NC unit and
external power supply, and securely insert it.
Check that the cable is not broken, and replace if broken.
The cable connected from the NC
unit to the peripheral device is
short-circuited.
Disconnect the cable connected to the peripheral device
one at a time and check that the power turns ON. Check
that there are no short-circuited cables.
There is a short circuit in the
configuration card.
Remove the removable cards one at a time and check that
the power turns ON.
Check that there are no short-circuited cards.
CAUTION
Do not apply voltages other than those indicated in this manual on the connector. Doing so may
lead to destruction or damage.
Incorrect connections may damage the devices, so connect the cables to the specified
connectors.
Do not connect or disconnect the connection cables between each unit while the power is ON.
Do not connect or disconnect the PCBs while the power is ON.