4. Failure and Troubleshooting
4-5
Symptom Cause Counter
measures
Oil fence monitor
lamp glows.
(1)
The condensate (fuel, engine oil and
coolant) is accumulated in the oil fence.
(2)
The liquid surface level detecting switch
does not function good.
Drain the condensate
Check/change
Circuit breaker
trips.
(1)
Overloaded
(2)
Short-circuit occurred at the load side.
Reduce the load
Get rid of cause of short-circuiting.
Even when operated
at a rated speed, no
voltage or too low
voltage generated.
(1)
Poor tightening of terminals
(2)
Frequency selector switch does not
match frequency produced
(3)
Broken or short-circuited circuit to
exciter field winding
(4)
Faulty exciter
(5)
Function circuit protector (CP) for AVR
protection
(6)
Faulty AVR
(7)
Broken or short-circuited winding of
generator main unit
(8)
Faulty silicon rectifier
(Installed on generator rotor)
(9)
Faulty voltmeter
Check/fasten
Check/change
Repair
Repair
Reset
Change
Repair
Change
Change
Too high voltage
generated when set
at the rated
frequency , Voltage
will not drop even
when the voltage
regulator controlling
knob is turned.
(1)
Loosened or disconnected wiring, or
connector to AVR
(2)
Broken wire or poor contact of AVR
variable resistor
(3)
Faulty AVR
Check/fasten
Repair or change
Change
Unstable voltage
generation
(1)
Poor tightening of each terminal
(2)
Function circuit protector (CP) for AVR
protection
(3)
Faulty AVR
Check/fasten
Reset
Change
Contact your nearest dealer if you find it difficult to repair by yourselves.
Prefer the section “4.2.2 Engine Body” when facing engine trouble.
Go
to
Discount-Equipment.com
to
order
your
parts
