Controller Replacement - Kohler 8.5RES Service Manual

9. Connect the positive (+) lead from the DC power
source, with the lamp in series, to terminal AC1 on
the SCR module. The lamp should not glow.
10. Connect the jumper, with the resistor in series, from
the positive lead of the DC power source to terminal
G1 on the SCR module. The lamp should glow.
11. Repeat steps 9 and 10, with the positive (+) lead
and lamp connected to terminal AC2 on the SCR
module, and connecting the jumper with resister to
terminal G2.
12. If any of the above checks indicates a bad SCR
module, replace the module.

4.10 Controller Replacement

If the troubleshooting procedures in Section 3 identify a
bad controller, use the procedure in this section for
controller replacement. Always check the controller
configuration, fuse, wiring, and connections before
replacing the controller. For output voltage problems,
replace the SCR module and check the operation again
before replacing the controller.
After replacing the controller, verify that the new
controller's configuration settings match the generator
set system voltage and frequency, unit configuration,
engine type, engine data input types, battery voltage,
and communications settings. Refer to Section 4.5 for
instructions to check the controller configuration and to
change the settings, if necessary.
After the controller configuration has been checked and
set to match the generator set, use a voltmeter to check
the generator set output voltage and frequency. If the
output voltage or frequency needs adjustment, use the
Voltage and Frequency Adjustment Procedure in
Section 5.7.2 and the controller voltage and speed
adjustment instructions in Section 4.5.3. Also see the
Frequency Adjustment Procedure in Section 5.8.5.
36 Section 4 Controller
ADC 2100 Controller Replacement Procedure
1. Remove the enclosure service-side door. See
Figure 4-18.
2. Place the generator set master switch in the OFF
position.
3. Remove 4 roof screws. Lift the roof up and off. See
Figure 4-18.
4. Disconnect power to the battery charger.
5. Disconnect the generator set engine starting
battery, negative (--) lead first.
1
1
1. Roof
2. Roof locating pin
3. Roof screws (4 ea.)
4. Service-side door
5. Front panel
Figure 4-18 Enclosure Roof and Door
2
3
4
tp6196
TP-6196 5/04
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