TROUBLESHOOTING
REV6 /REV2 OI 248 (EN) 57
8 Troubleshooting
8.1 Electrical Switching Commands Are Not Correctly Executed
• Check the control voltage.
• Check the gas pressure on the density monitor. If the gas
pressure is UW2 or less, no switching commands will be
executed.
• Check the charging state of the closing spring. If the closing
spring is not charged, no closing operations can be carried out. It
is possible that a motor protection switch has tripped and
disconnected the charging motor from the power supply.
• Check the shunt releases. Replace defective coils, determine the
cause of a potential overload and eliminate the cause.
• Check the terminal connections to make sure they are tight and
properly connected.
• Check the contactors in the faulty control circuit.
• Check the electric operating points of the density monitor.
Work on the control system involves the danger of electric shock.
Sudden movements of the charging system or the breaker linka-
ge can cause serious injury.
Troubleshooting tasks should be handled by qualified staff only.
Such staff must follow the safety rules of electrical engineering.
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