Kohler 8.5RES Service page 28

Troubleshooting Chart, continued
Problem Possible Cause
Generator Crank relay on relay
set does not interface board
crank, (ADC 2100)
continued
Crank relay K3 on
controller circuit board
(ADC-RES)
Blown fuse F2
(ADC-RES)
Generator set master
switch
Poor ground (--)
connection
Starter relay
Starter
Controller
Cranks but No fuel
does not
Insufficient fuel pressure
start
Fuel regulator/valve
Spark plugs or spark
plug connections
Loose connection or
open circuit
28 Section 3 Troubleshooting
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Corrective Action
Check connections to the RIB. Check for 12VDC to the RIB on
lead 71N.
Check for a good ground connection (lead 16N)
Check crank relay K2 operation (LED3). Replace the RIB if relay
does not operate.
Check connections to the controller.
Check for a good ground connection.
Check LED3 to verify 12 VDC to relay K3.
If LED3 is not lit, check for 12 VDC to the board.
If LED3 is lit but the relay does not operate, replace the controller
circuit board.
Replace fuse.
If fuse blows again, disconnect the leads one at a time to identify
the cause of the blown fuse:
D Lead 70C at the fuel valve.
D Lead IGN at the ignition module
D Lead 71A at the starter relay
D Leads FP and FN at the rotor
D Repair or replace the component causing the blown fuse.
If fuse continues to blow and the previous step did not identify
the cause, check the continuity of leads FP and FN and the
leads from the P14 connector. Replace any bad leads. Use a
pin pusher to remove leads from the connector, if necessary. If
replacing the leads does not solve the problem, replace the
controller circuit board.
Check connections to the master switch.
Test function of master switch.
Clean and retighten.
Check connections to the starter relay.
Check continuity of circuit.
Check that the starter relay picks up when 12VDC is applied at
lead 71A connection.
Check starter connections.
Rebuild or replace starter.
Check controller connections and operation. Check for power to
the controller. Move generator set master switch to OFF/RESET
and then to RUN.
Open (turn on) manual fuel valve. Check fuel supply tank (LP).
Check fuel pressure to the generator set. Verify adequate fuel
pressure and pipe size for the generator set plus all other gas
appliances.
Check regulator/valve operation.
Check spark plug wires and connections. Replace or clean and
regap spark plugs.
Check for loose or open connection at the fuel valve (lead 70A)
and at the engine spark control module (leads IGN and 70A).
Check controller/engine wiring continuity.
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Reference
Section 4.8 or
5.7; Section 8
Section 8
Section 4.8 or
5.7
Section 5.7
Section 8
Section 8
Section 5.7
Section 6.13
Section 8,
ADV-7325
Section 8,
ADV-7325
Section 4.8 or
5.7
Section 6.15
Section 6.15
—
Section 1.7
Section 6.15
Section 8
Section 8
Section 1.7
Section 8
Engine Service
Manual (S/M)
Section 4 or 5
Section 8
—
Section 6.12.3
Section 6.12
4
Section 2.3
Section 8
TP-6196 10/09