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5 Troubleshooting
This chapter provides solutions for some of the
problems you may encounter while using the DEU.
Symptom Reason Solution
Fails to power on. Power cord not connected properly.
Power not available at the outlet.
Power switch not in the proper
position.
Faulty fuse.
Faulty power cord.
Verify that the power cord is properly
connected to the power module.
If the DEU is plugged into a three-hole
grounded outlet, verify if power to the
outlet has been interrupted. This can be
accomplished by testing the outlet with a
known working appliance, like a lamp.
Be sure that the power switch is in the
“ON” position, labeled “I”.
Replace fuse, see
Replacing a Fuse
described earlier in this guide.
Replace power cord.
If the DEU is not responding,
contact your service provider.
Operator Control Panel
display indicates
“Hardware Error.”
Possible component failure. From the Operator Control Panel,
“Hardware Menu” from the Main Menu
and select “Component Status.” Scroll
down through the list to locate the failed
component. Follow the procedures in
the
Maintenance
chapter to replace the
failed component.
LED and audible alarms
indicate the system
failed the diagnostic
test.
Power-on self-test failed. From the Operator Control Panel,
“Hardware Menu” from the Main Menu
and select “POST Results.” Scroll down
through the list to locate the failed
component, see
Power-On Self
Diagnostics
described earlier in this
guide.
LED Status Reason Solution
Operator Control Panel
display indicates
cabinet temperature
threshold has been
Cooling fan failure. From the Operator Control Panel,
“Hardware Menu” from the Main Menu
and select “Component Status.” Scroll
down through the list to locate the failed