43TROUBLESHOOTING
BGenerator Troubleshooting
Trouble Possible causes Correction
Unusual noise or vibration
Single-phase load applied beyond allowable
level (on three phase models).
*Lower the load to acceptable level.
Bearing deteriorated. *Replace the bearing.
Coupling damaged. *Replace the coupling.
Frame overheated.
Cooling fan inlet or outlet blocked. *Unblock the inlet or outlet.
Voltage too high. *Readjust the voltage.
Overloaded. *Reduce the load.
Voltage failure to rise.
Voltage maladjusted. *Readjust using the voltage control.
AVR excitation output cable broken. *Repair the cable.
AVR itself in trouble. *Replace the AVR.
Exciter's winding short-circuited or broken. *Replace the generator.
AVR excitation input cable broken. *Repair the cable.
Generator's winding broken. *Replace the generator.
AVR excitation output fuse blown out. *Replace the fuse.
Voltage too high.
Voltage maladjusted. *Readjust using the voltage control.
AVR voltage detection cable broken. *Repair the cable.
AVR itself in trouble. *Replace the AVR.
Mercury arc lamp or such conductive load
connected.
*Disconnect such load.
Voltage hunting
Inverter or such switching load connected. *Disconnect such load.
AVR itself in trouble. *Replace the AVR.
Circuit breaker turned OFF.
Connected cable or load short-circuited.
*Contact a qualified electrical engineer for
inspection.
Overloaded. *Reduce the load.
Pilot lamp failure to light up
Lamp bulb broken. *Replace the bulb.
Generator voltage too low. *See "Voltage failure to rise" above.
1G296-8914.book 43 ページ ２０１２年３月１９日 月曜日 午前１０時４０分
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