4
4.
Troubleshooting
Turn off power
If the AC adapter is overheated or gives out smoke or unusual smell,
immediately turn off the power. Otherwise, fire or electric shock can result.
For troubleshooting, refer to the following troubleshooting chart.
Turn off the power before troubleshooting.
○ POWER LED on the unit does not come on when power is turned on.
Possible cause
Corrective action
Power connector is disconnected.
Check the power inlet connector for connection.
Power cord is not in continuity.
Check the wires of the power cord for continuity and
insulation using a circuit tester or other.
Input power voltage is below the specified
range.
Check the input power voltage using a circuit tester or
other.
The AC adapter has failed.
Check the output voltage using a circuit tester or
other. If output is not delivered, send the AC adapter
to ULVAC for inspection and repair.
Life of the product. Be replaced with a new one.
