Briggs & Stratton 040298, Service & Troubleshooting Manual

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49
2
2
Check Full-Load Frequency
1. Turn OFF utility power to the transfer switch. The unit
should start and transfer to generator power.
2. Gradually add electrical loads to the generator until it
is running at full rated capacity.
3. Measure frequency at the load side of the circuit
breaker (Figure 34).
Figure 34
• If the frequency is correct, restore utility
power then proceed to TEST 2 - Measure
Frequency at #E1 and #E2 .
• If the frequency is not correct, slowly rotate
the governor adjustment nut until the
frequency is above 57.0 Hz - 62.5 Hz. Then
reapply utility power.
• If a full-load frequency adjustment was
performed, recheck at no-load to verify
frequency.
TEST 2 - Measure Frequency at #E1 & #E2
1. With the unit running at full rated capacity, as
described in Check Full-Load Frequency, measure
the frequency at #E1 and #E2 at the control panel
pins (
A , Figure 35).
Figure 35
• If the frequency is not correct, repair or
replace the wiring between the circuit
breaker and #E1 and #E2 at the control
panel. Then re-test the frequency at #E1 &
#E2.
• If the frequency is correct but the generator
continues to shut down for low frequency,
replace the control panel board. Remember
to reset the exercise timer.
Not
for
Reproduction