Generac Power Systems 941-2 Service Manual page 111

Section 7.2
ENGINE DC CONTROL SYSTEM / AC TROUBLESHOOTING
INTRODUCTION
This Section contains troubleshooting information pertaining to the engine DC control system. The section is
divided into two parts, i.e., troubleshooting flow charts and diagnostic test procedures.
Use the flow charts and the test procedures in conjunction with one another. The first step in troubleshooting is to
identify the problem. After identifying the problem, go to the flow chart that best describes it. Perform each test in
the flow chart and follow the flow chart arrows and instructions. If you need instructions for any test, refer to the
applicable diagnostic test procedure.
Problem solving on the computer controlled generator is somewhat more complex than problem solving on con-
ventional units. The A6060 circuit board, in addition to its voltage and frequency control functions, has engine
shutdown capability. See "AUTOMATIC SHUTDOWNS" on Page 1.2-5. The A6060 circuit board, part of the
engine's DC control system, also has engine shutdown capability.
Fortunately, neither the generator proper nor the engine DC control system has a large number of parts. When a
problem is encountered, its solution can usually be found after only a few tests.
PROBLEM 1- PRIMING FUNCTION DOES NOT WORK
Page 7.2-1