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EA05A
3
1. Before you turn on the generator, please turn the
voltage adjustment and stability adjustment full
anti-clockwise. After the generator is on and run
stably, turn the voltage adjustment clockwise to
reach the required out voltage. (If there is an
external
potentiometer,
turn
the
external
potentiometer to the middle position before adjust
internal voltage potentiometer.)
2. Adjust “Stability Adjustment” clockwise slowly to
change the feedback time between AVR and the
generator. If the adjustment is too big, it might
cause the voltage instable. If too small, the load
voltage will change too much at heavy load. Our
suggestion is to trace by the multi-meter DCV. To
adjust “stability adjustment”, you just need to
make the multi-meter waving smaller. It can also
improve the full load’s voltage drift rate.
4. FIELD FLASHING
When the regulator is operated with the generator for
the first time, the polarity of residual magnetism may
be reversed or too small to achieve the necessary
build-up voltage for the regulator. If reversing the field
connections does not induce build-up, and the residual
voltage is less than the specified value of 5 Vac, shut
down the Prime-mover and proceed with the following
steps :
1. With the Prime-mover at rest and the regulator’s
field output wires disconnected, apply a DC
source ( NOT grounded ) of not more than 3~12
Vdc with Positive to F+ and Negative to F-, in
series with a current-limiting resistor of 3~5 ohms
20 watt. (The set battery is a suitable source.)
2. Allow approximately 3 seconds before removing
the DC source.
3. With the voltage regulator disconnected ( wires 3
and 4 ), start the prime mover and measure the
“ residual ” voltage available at the auxiliary
winding. If this voltage is greater than 5 Vac,
reconnect voltage regulator, and voltage build-up
should be successful. If less than 5 Vac is
measured, repeat field flashing procedure.
4. If repeating steps a. and b. does not result in
generator voltage build-up, and residual is
greater than 5 Vac, replace voltage regulator.
5. TROUBLE SHOOTING
SYMPTOM
CAUSE
CORRECTION
Engine speed is too low.
Please refer to the Generator Manual.
Residual voltage is too low.
Please refer to the section introduction of
excite.
B,C,F+,F- wires are not connected well.
Please refer to Figure 2 ~ Figure 5.
Voltage does not
build up
Defective Generator.
Please refer to the Generator Manual.
The input wiring of A,B,C are not correct. Please refer to Figure 2 ~ Figure 5.
Check the external potentiometer.
Check wiring and potentiometer.
Under frequency.
Please refer to the Generator Manual.
The exciter does not match the AVR.
Please refer to the Generator Manual.
Out voltage low
The voltage / frequency selector setting
is not correct.
Please refer to Figure 7.
Fuse blown
The exciter flash is too large or wiring
doesn’t connect well.
Please refer to the Generator Manual.
Please refer to Figure 2 ~ Figure 5.
A,C terminals are not connect or wiring
incorrect.
Please refer to Figure 2 ~ Figure 5.
Out voltage high
The voltage / frequency selector setting
is not correct.
Please refer to Figure 7.
Out voltage instable Stability Adjustment doesn’t adjust well.
Please refer to the section introduction of
Adjustment.
P.S. Please use the fuse of the original plant.
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