7-6 100-214-239 Rev. A
Maintenance
Table 1: System Trouble Analysis Chart
Symptom Probable Cause Corrective Action
Main power fuse fails or
circuit breaker trips when
system is plugged into
electrical outlet.
• Cordset has failed • Replace cordset
• Power Switch has failed.
• Line filter has failed.
• Return for repair
Display screen does not
appear when unit is
turned on. Fan does not
operate.
• Systemis unplugged or main
power is missing
• Correct power problem
• Unit fuse has blown (it
should not under normal con-
ditions)
• Replace fuse
• Cordset has failed • Replace cordset
• Power Switch has failed
• Line filter has failed
• Unit failed due to connection
to incorrect input voltage
• Return for repair
Fan does not operate
when system is turnedon.
Display screen appears.
• Fan motor has failed • Return for repair
Fuse fails when system is
turned on.
• Fuse is under-rated
• Mains Voltage is incorrect
• Fan motor has failed
• Power supply module has
failed
• Unit failed due to connection
to incorrect input voltage
• Verify voltage source is
correct. Damage may
occur if connected to
wrong voltage source
• Replace fuse with cor-
rect value and retry; or
return for repair
Ultrasonic power is not
delivered to the horn.
• Ultrasonic power supply
module has failed
• Digital controls have failed
• Return for repair
Unusual noise from Horn
when ultrasonics are on
• Horn or Tip is loose, or it is
contacting a solid object
• Reposition horn
• Remove, examine, and
clean tip; reinstall tip
• Horn or tip has failed • Replace horn or tip
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