Generac Power Systems GP Series Diagnostic Repair Manual page 30

Section 3 AC Troubleshooting Flowcharts
Problem 3 – Voltage & Frequency Are Both High or Low
Problem 4 – Excessive Voltage/Frequency Droop When Load is Applied
Problem 5 – Generator Produces High Voltage at No-Load
24
TEST 8 – CHECK LOAD
VOLTAGE &
FREQUENCY
TEST 9 – CHECK LOAD
WATTS AND AMPER-
AGE
TEST 10 – ADJUST
VOLTAGE
REGULATOR
TEST 34 – TROUBLESHOOTING
ELECTRONIC
THROTTLE CONTROL VALVE
TEST 8 – CHECK
LOAD VOLTAGE &
FREQUENCY
TEST 9 – CHECK LOAD
WATTS AND AMPERAGE
PROBLEM 6 – DOESN'T START,
STARTS HARD OR RUNS
ROUGH/LACKS POWER
TEST 1 -CHECK NO
LOAD VOLTAGE &
FREQUENCY
TEST 10 – ADJUST
VOLTAGE REGULATOR
TEST 6 – TEST SENSING
CIRCUIT WIRES
TEST 7 – TEST STATOR
WINDING
Diagnostic Repair Manual