Briggs & Stratton 1938 Operator's Manual page 33

_& Stra_on Service &
Troubleshooting Guide - Home Generator Systems
'_ Model 1938 (lOkW) Troubleshooting
o• If continuity is measured:
• Select MANUAl. at the AUTO/OFF/MANUAL switch
and allow engine to stabilize.
• Measure voltage and frequency at Pin #10, Wire #66
and Ground as shown in figure 33.
High Oil Temperature: (Seven Blinks [ ...... o])
The contacts of the temperature switch are normally open
(NO). If the engine oil temperature exceeds approximately
140°C (284°F), the switch contacts close and the engine
shuts down.
Common causes for this condition include:
- Running the unit with all access doors removed
- Obstructed air inlet or exhaust port
- Debris in the engine cylinder cooling fins
When the problem is corrected, reset the fault detection
system:
• Place the AUTO/OFF/MANUAL switch in the OFF
position for 30 seconds or more.
High Oil Temperature Troubleshooting Procedure:
• Remove Wire #95 from the Oil Temperature Sensor as
shown in figure 34.
18-22VAC & 60-62 Hz
........................................................................................................................................................ _ should be measured.
NOTE: Follow the Frequency Measurement
instructions that apply to the type of meter you are
using.
•• If frequency and voltage are correct:
• Verify that CMA is not picking up a signal elsewhere.
Verify Ground connection on CMA circuit board.
(See Figure 32)
• Replace CMA Circuit Board.
•• If frequency is not correct:
Check engine RPM.
• Set engine RPM to 3600, as specified in the BRIGGS &
STRATTON engine service manual.
• Start engine.
• • If engine starts and runs:
• Verify engine is not overheating.
This can be accomplished by checking the following:
• Verify that the cooling intake is clear of obstructions.
• Check that the engine has the proper amount and type
of oil.
• See that the engine cooling fins are not clogged.
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