Troubleshooting (Generator) - MULTIQUIP WhisperWatt DCA45SSKU3 Operation And Parts Manual

Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a
breakdown, use Table 19 shown below for diagnosis of the Generator. If the problem cannot be remedied, consult our
company's business office or service plant.
symptom
No Voltage Output
Low Voltage Output
High Voltage Output
Circuit Breaker Tripped
When the Emergency/Malfunction shutdown system has been activated, the engine will be stopped and the pre-heat lamp
will indicate the malfunction by a series of flashing patterns. The flashing patterns and corrective action are shown below
in Table 20. The flashing patterns consist of combinations of one or more long flashes and one or more short flashes.
Type of Fault
Engine Overspeed
Low Oil Pressure
Insufficient Charge
High Water Temperature
Emergency Stop
Starter Motor Protection
Rotation Sensor
Solenoid
Water Temperature
Sensor
Charging Gen. Terminal
Over Voltage
page 46 — DCa45ssk/ku3 60 hz generaTor • operaTion anD parTs manual — rev. #0 (12/15/11)

trOuBleshOOting (generatOr)

Table 19. generator Troubleshooting
possible problem
AC Voltmeter defective?
Is wiring connection loose?
Is AVR defective?
Defective Rotating Rectifier?
Defective Exciter Field?
Is engine speed correct?
Is wiring connections loose?
Defective AVR?
Is wiring connections loose?
Defective AVR?
Short Circuit in load?
Over current?
Defective circuit breaker?
Over current Relay actuated? Confirm load requirement and replace.
Table 20. engine/generator Troubleshooting (pre-heat lamp)
possible Fault
115% or more rated RPM speed?
Oil pressure 7 psi (49 kPa) or
greater?
No Voltage of Charging Genset?
Engine Overheat, 230° F (110° C)?
Engine Overheat, 248° F (120° C)?
Emergency Stop signal detected?
Starter motor run for 12 seconds
or more?
Defective sensor, short circuit?
Defective solenoid, short circuit?
Disconnection
Short Circuit
Disconnection
VCC 18 volts or greater
solution
Check output voltage using a voltmeter.
Check wiring and repair.
Replace if necessary.
Check and replace.
Check and replace.
Turn engine throttle lever to "High".
Check wiring and repair.
Replace if necessary.
Check wiring and repair.
Replace if necessary.
Check load and repair.
Confirm load requirements and reduce.
Check and replace.
pre-heat lamp
indication
Long 1 Short 1
Long 1 Short 2
Long 1 Short 3
Long 1 Short 4
Long 1 Short 6
Long 1 Short 5
Long 1 Short 7
Long 2 Short 1
Long 2 Short 2
Long 2 Short 4
Long 2 Short 5
Long 2 Short 6
Long 3 Short 1
solution
Check electronic governor
Check oil level.
Check wiring and repair.
Check cooling system.
Check cooling system.
Check and repair fault
Check wiring and repair.
Check wiring and repair.
Check wiring and repair.
Check connection.
Check sensor. Replace.
Check connections.
Check overcurrent relay.