2. FAULT DIAGNOSIS
2.2 Troubleshooting
II
-6
(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 230AC
+10%/–15%.
(Note)
The power supply for this unit is 24VDC.
The external power supply is
faulty.
Check that the power can be turned ON with just the
external power supply.
(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 unit and the external
power supply, and check that the external power supply
output voltage is normal.
The power cable is disconnected
or broken.
Check the cable between the unit and external power
supply, and securely insert it.
Check that the cable is not broken, and replace if broken.
There is a short circuit in the
configuration card.
Check that no inductive foreign matter has entered the unit.
The power turns OFF.
Cause
Remedy
There is a problem in the supplied
power.
Check whether the voltage fluctuates at certain time zones.
Check whether an instantaneous power failure has
occurred.
A problem occurs when the
peripheral device starts operating.
Check whether the voltage drops instantaneously when the
peripheral device operation starts.
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