Alpha Technologies AlphaGen 3.5_5.0kW Kohler COM5 - Manual (Page 47)

TP-6482 8/06 47 Section 5 Component Testing and Adjustment
5.5.3 Ignition Coil
Use an ohmmeter or a test lamp to check the ignition coil
primary winding. Measure the resistance across the
positive (+) and negative (--) terminals and from one
terminal to ground. If the test shows that the winding is
open or grounded, replace the ignition coil.
Disconnect the high tension lead from the engine spark
plug and connect it to a test spark plug. Disconnect
lead C from the ignition module. Move the generator set
master switch to START. Ground lead C and watch the
test plug for sparks. If no sparks are produced the
ignition coil secondary winding is faulty. Replace the
ignition coil.
5.6 Starter
Check the starter if the generator set engine does not
crank.
Check the battery voltage and connections before
proceeding.
Check for a locked rotor or other fault
condition that may have shut down the unit. Correct the
fault condition and reset the controller to clear a fault
shutdown.
Note: Always check the wiring and connections before
replacing components.
The crank cycle attempts to start three times, cranking
for 20 seconds and then resting for 5 seconds between
attempts. LED 7 on the control board lights to indicate
that cranking is energized.
LED 5 indicates an
overcrank shutdown; reset the controller if LED 5 lights
during these tests. See Figure 5-18.
M-337000C-B
1
4
5
1. Control circuit board
2. LED locations
3. Voltage adjustment pot 4. Generator set master switch, 3-position
5. Common fault indicator, LED8
P1
P2
P3
R37
FAULT
RUN
AUTO
STOP
LED1 LED3
LED6
LED7
LED5
LED4 LED2
LED8
2
3
Figure 5-18 Controller Board