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12. TROUBLESHOOTING
In case of trouble, take corrective actions
referring to this troubleshooting chart.
Before troubleshooting, turn off the power.
●
Turning On the power dose not light the display.
Possible cause
Corrective action
The power cord is disconnected.
Check the 3-pin outlet plug and inlet connector on
the rear panel of the controller for connection, and
reconnect it.
The power cord is broken.
Check the 3-pin power cord wires for continuity and
insulation using a circuit tester.
The line voltage is below the
specified range.
Check if the line voltage is within the specified range
using a circuit tester. (line voltage: 100 VAC ± 10V)
The fuse in the main power
supply has blown out.
Take out the fuse box by turning the screw with a
Philips screwdriver and check for continuity using a
circuit tester.
When the fuse has blown out: If the cause is a
momentary overcurrent, the problem can be solved by
replacing the fuse, but if an overcurrent is flowing for
other cause, it will blow out again.
Locate the real cause of trouble from other items.
The power line in the controller
is disconnected.
Disconnection or short has occurred in the power line
in the controller (inline filter, wiring, power switch,
transformer, switching power supply, etc.)
Contact ULVAC for inspection and repair.
Trouble has occurred in the
controller due to erroneous
wiring of external I/O
connector.
Element in the controller was damaged by erroneous
wiring of the wire to the external I/O connector. Or
the line voltage drops.
Correct the wiring.
Contact ULVAC for inspection and repair.
The cable between the power
supply board and controller
board is disconnected.
The cable between the
controller power supply board
and the display board is
disconnected.
The cable was disconnected by vibration in transit.
Remove the top and bottom panels of the controller to
check where it is disconnected.
Reconnect the disconnected cable.
CPU is out of control due to
external noise.
Turn ON the power again to start up CPU normally.
Examine the corrective action against noise
separately.
Turn off
power.
CAUTION
Summary of Contents for GI-M2
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