Use and Care Manual

Tsurumi’s Operation, Service and Repair Manual
Troubleshooting
38
FAULT PROBABLE CAUSE REMEDY
No AC output. Stator fault continued. 8. Check insulation resistance between the
stator core and each stator leads. Check
using a megger tester. Replace the stator if it
fails the megger test.
Rotor fault. 1. Check rotor.
2. Remove generator rear cover and stator
(refer to COMPONENT REPLACEMENT for
procedures).
3. Using a multimeter, measure field coil
resistance. Measure resistance at the
soldered terminals of the rotor and the core.
NOTE: Because a diode is soldered to the coil
ends at the terminals, resistance may be
measured only when the multimeter probes touch
the terminals in one combination of polarity.
Therefore, if no resistance reading appears, try
checking in reverse polarity.
4. Using a megger tester, check insulation
resistance between the soldered terminal and
the stator core.
5. Replace rotor if it does not meet the
resistance values in Table 5-1.
AC voltage too high
or too low.
Engine speed too high or
too low.
1. Check engine speed.
2. Operate the generator with no load applied
on the generator.
3. If the speed is too high or too low, adjust
throttle adjustment screw to set engine speed
as specified in Table 5-1.
Total wattage applied by
appliances, lights, power
tools, etc., exceeds
generator’s rated load.
1. Calculate generator load.
2. Calculate total wattage being applied to the
generator (rated load of each connected
power-consuming device times the power
factor of the device).
3. Disconnect power-consuming device(s) as
required to reduce total wattage to the level
shown on the generator data placard.