In this section:
Stuck buttons ........................................................................... 9-1
Line power................................................................................ 9-1
Repeated trips .......................................................................... 9-1
Incorrect rear-panel output voltage .......................................... 9-1
Front-panel test ........................................................................ 9-2
Power-on reset ......................................................................... 9-2
No high voltage ........................................................................ 9-2
Service ..................................................................................... 9-2
Stuck buttons
If the center display is filled with a number (such as 4444) or one particular message (such as Err2),
and the front panel buttons are unresponsive, check to see if a button is stuck. If so, gently tap the
stuck button back to the center of its hole to free it.
Line power
Verify that the line cord is plugged completely into the power entry module and that the front panel
power switch is on.
Repeated trips
Voltage Trips
— This problem may occur if the load changes too rapidly, causing the voltage to
overshoot. Try raising the voltage limit.
Current Trips
— Disconnect the load, and note if the unit still trips. If the unit operates with no load,
the load may be causing the problem. If the unit still trips with the load disconnected, the unit may be
damaged. Contact the factory for further information.
Incorrect rear-panel output voltage
If the output voltage is not correct, check the REAR LED and rear panel VOLTAGE Switch to verify
the unit is in the SET mode. Also, check that the voltage limit is higher than the desired voltage.
Section 9
Troubleshooting