Symptom
HTUPS 500 is always
in battery mode.
16
TROUBLESHOOTING
Possible Cause
Power cord is loose.
AC fuse is blown.
HTUPS 500 is defective.
Remedy
• Ensure that the power cord is firmly
plugged into the back of the unit
and the AC wall outlet.
• Unplug the power cord from the wall
outlet and remove and replace the
250V AC fuse.
• Please see warranty information.