Guardian 5240 Diagnostic Repair Manual page 34

SECTION 2.1
DESCRIPTION & COMPONENTS
Figure 5. Typical Voltage Regulator
A single red lamp (LED) glows during normal opera-
tion. The lamp will become dim if excitation winding
AC output diminishes. It will go out on occurrence of
an open condition in the sensing AC output circuit.
An adjustment potentiometer permits the stator AC
power winding voltage to be adjusted. Perform this
adjustment with the generator running at no-load, and
with a frequency of:
• 57.5-59.5 Hz (V-Twins units)
• 62-63 Hz (Single Cylinder units)
At the stated no-load frequency, adjust to obtain a
line-to-line AC voltage of:
• 250-252 volts (V-Twins units)
• 247-252 volts (Single Cylinder units)
MAIN LINE CIRCUIT BREAKER:
The main line circuit breaker protects the generator
against electrical overload. See "Specifications" in
front of manual for amp ratings.
Page 32
PART 2
AC GENERATORS