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Troubleshooting
The PWI320 Power Supply is designed to provide years of reliable service. However in the
event that it does not seem to be operating correctly, here are some things you can check.
AC Present LED does not come on.
First make sure any external circuit breaker is ON. Unplug or turn off the external power to the
Power Supply. Plug any other device into the AC receptacle or use a multimeter to make sure
AC is present. Remove the fuse and check for continuity with a multimeter. If the fuse is open,
replace it with the recommended fuse listed on the label and reconnect or turn the power back
on. The AC Present LED should come on. If it does not, then there is an internal failure and the
Power Supply will have to be returned for service.
Output Low Voltage Indication (overload)
If the Power Supply is overloaded and the output voltage drops below 1/2 the nominal voltage
for the unit, the output will cycle on/off until the overload condition is removed.
Power Supply Overtemp
If the Power Supply gets too hot, it will switch to Standby until it cools sufficiently to resume
normal operation.
Low Input Volts
If the input voltage drops below the minimum voltage necessary for normal operation, the
Power Supply will show this display. The Power Supply will switch to Standby and wait for
the voltage to recover
Power Supply Failed
If the processor detects a condition that prevents the Power Supply from operating, it will
show this display. Try unplugging and re-plugging the power a couple of times to see if that
clears the problem. If it does not clear the display the Power Supply will have to be returned
for repair. More information on the nature of the fault can be determined by connecting the
Power Supply, using a laptop, and using the Power Wizard program to see if a more detailed
error message is displayed.
