YOKOGAWA PUS400G, User Manual, Page: 24 / 31

< 5. Trouble shooting >
5-1
IM 19C1B3-01E
5. Troubleshooting
If ultrasonic cleaning yields unfavorable results, make inspections first of all, referring to Chapter 4 in
this manual. This chapter describes remedies for malfunctions of the ultrasonic oscillator.
Caution against Electric Shock
Some areas in the electric circuits in the PUS400G ultrasonic oscillator remain carrying high voltage
for a while (approx. 10 minutes) even after the power switch is turned OFF.
In inspecting the electric circuits, allow a sufficient period of time before removing the panel.
Repair to faults in the electric circuits should be consult with YOKOGAWA.
5.1 Remedies for Troubles
If any trouble is encountered, promptly try to find the cause and remedy it.
5.1.1 Troubles and Possible Causes
Table 5.1 lists troubles that may be encountered and their causes.
Table 5.1 Troubles and Causes
Trouble Possible cause
No ultrasonic wave is generated from
ultrasonic vibrator.
Defect in ultrasonic vibrator (Refer to Subsection 5.2.1.)
Fault in ultrasonic oscillator (Refer to Subsection 5.2.3.)
Frequent burnout of fuses Abnormally in equipment (*)
In-action pilot lamp lighting does not
come back.
Defect in ultrasonic vibrator (disconnection in connecting wires)
Degraded cleaning results Supply voltage drop (Refer to Subsection 5.1.2.)
Abnormally in ultrasonic vibrator (*)
*: Consults with YOKOGAWA.
5.1.2 Remedy for Supply Voltage Drop
If the voltage of the power supply to the ultrasonic oscillator drops, the ultrasonic power is also
reduced. If the voltage remains below the allowable range for a long time, re-connect the oscillator to
another power supply with less voltage fluctuation.