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d. If coil resistance was measured in CS and FS,
and FS2 Wire 14 is shorted to ground between
J2 connector and CS, FS, or FS2, repair or
replace the shorted wire.
8. Disconnect Wire 14 from the Fuel Solenoid (FS) and
Choke Solenoid (CS).
a. Connect one meter test lead to the FS terminal
from which Wire 14 was removed. Connect the
other meter test lead to the ground terminal. 16
ohms should be measured. If zero resistance
was measured, replace the FS.
b. At the CS connector, connect one meter test
lead to Wire 14. Connect the other meter test
lead to Wire 90. 4 ohms should be measured.
If zero resistance was measured, replace the
Choke Solenoid.
c. If coil resistance was measured in the Choke
Solenoid, and FS Wire 14 is shorted to ground
between the J2 Connector and CS or FS, repair
or replace the shorted wire.
9. Disconnect Wire 4 and Wire 0 from the Voltage Regulator
(VR).
a. At the J2 connector, connect one meter test
lead to Wire 4. Connect the other meter
test lead to a clean frame ground. Note the
resistance reading and compare to the rotor
resistance in the front of this manual. If zero
resistance was measured, test Wire 4 for a
short to ground. Check brushes, slip rings,
and rotor.
TEST 81 – CHECK TO SEE IF LOW SPEED
FUNCTION IS ENABLED
DISCUSSION:
The Low speed exercise function when it is
enabled allows the generator to exercise at 2400
rpm. If it is disabled it will exercise at its 3600 rpm
during exercise.
PROCEDURE:
1. Press the “ESC” key till the main menu is reached.
2. Press the right arrow key until “Edit” is flashing.
3. Press “Enter”
4. Press the right arrow key until “Exercise Time” appears
on the controller.
5. Press “Enter”.
6. Press the right arrow key until the Low speed exercise
option is displayed.
7. Ensure that it is enabled.
RESULTS:
Refer back to flow chart.
TEST 82 – CHECK OPERATION OF THE
CHOKE SOLENOID
DISCUSSION:
The choke solenoid should be closed when it is in low
speed exercise.
PROCEDURE:
1. Remove the air box cover and filter from the engine.
2. Refer to test 79 for Test Exercise Function
3. When the generator starts and the display reflects that
it is exercising, confirm that the choke solenoid is fully
closed over one port.
RESULTS:
1. If the solenoid did not close, confirm that utility voltage is
present. If the generator believes that there is a power
outage it will run at full speed until utility is returned.
2. If the solenoid closed, replace the controller.
Page 146
PART 4
DC CONTROL
SECTION 4.4
DIAGNOSTIC TESTS