Kohler 8RESV troubleshooting: 2 fault codes and 28 symptom-cause-remedy entries from the manufacturer's own service documentation.
Kohler 8RESV — full specs, parts & maintenance.
| Code | Meaning | Remedy |
|---|---|---|
| Accy PwrOver Warning | Accy PwrOver Warning — controller internal circuit protection activated | Press OFF to reset. Contact an authorized Kohler distributor/dealer for service |
| MainPwrOverL Shutdown | MainPwrOverL Shutdown — controller internal circuit protection activated | Press OFF to reset. Contact an authorized Kohler distributor/dealer for service |
| Symptom | Cause | Remedy |
|---|---|---|
| Controller display backlight is off | Backlight turns off after about 1 minute with no activity | Backlight will turn on when a button is pressed or the generator set starts |
| Controller display is off | Low or no battery voltage | Check connections; Check generator set battery |
| The generator set does not crank | Battery weak or dead | Recharge or replace the battery |
| The generator set does not crank | Battery connections reversed or poor | Check the connections |
| The generator set does not crank | Fault shutdown | Check the controller display for fault messages. See Section 2.5. Correct the fault condition and reset the controller |
| The generator set does not crank | Generator set in the OFF mode | Press the RUN button to start the engine or press AUTO to allow remote starting |
| The generator set does not crank | Gererator thermostat tripped | For trips other than temperature (nuisance trips), reset the thermostat. See Section 2.6 |
| The generator set cranks but does not start, starts hard, lacks power, or operates erratically | Air cleaner clogged | Clean and/or replace the air cleaner |
| The generator set cranks but does not start, starts hard, lacks power, or operates erratically | Battery weak or dead | Recharge or replace the battery |
| The generator set cranks but does not start, starts hard, lacks power, or operates erratically | Battery connection poor | Clean and tighten the battery connections |
| The generator set cranks but does not start, starts hard, lacks power, or operates erratically | Spark plug wire connection loose | Check the spark plug wires |
| The generator set cranks but does not start, starts hard, lacks power, or operates erratically | Low oil pressure shutdown | Check for oil leaks. Check the oil level and add oil if necessary |
| The generator set cranks but does not start, starts hard, lacks power, or operates erratically | Fuel pressure insufficient | Check the fuel supply and valves |
| The generator set cranks but does not start, starts hard, lacks power, or operates erratically | Engine malfunction | Contact an authorized Kohler distributor/dealer |
| The generator set cranks but does not start, starts hard, lacks power, or operates erratically | Gererator thermostat tripped | For trips other than temperature (nuisance trips), reset the thermostat. See Section 2.6 |
| No AC output | Line circuit breaker in the OFF position | Place the circuit breaker in the ON position |
| No AC output | Line circuit breaker tripping because of overload | Reduce the load on the generator set |
| No AC output | Line circuit breaker tripping because of short circuit | Contact an authorized Kohler distributor/dealer for service |
| No AC output | Auxiliary winding circuit breaker tripped | Reset the circuit breaker (located in junction box). Contact an authorized Kohler distributor/dealer for service if breaker trips repeatedly |
| Low output or excessive drop in voltage | Generator set overloaded | Reduce the load |
| Generator set stops suddenly | Low oil pressure shutdown | Check for oil leaks. Check the oil level and add oil if necessary |
| Generator set stops suddenly | Out of fuel | Check fuel supply |
| Generator set stops suddenly | Overcrank shutdown | Reset the controller. If the overcrank fault occurs again, contact an authorized Kohler distributor/dealer |
| Generator set stops suddenly | Auxiliary winding circuit breaker tripped | Reset the circuit breaker (located in junction box.) Contact an authorized Kohler distributor/dealer for service if breaker trips repeatedly |
| Generator set stops suddenly | Fault shutdown | Check the controller display for fault messages. See Section 2.5. Correct the fault condition and reset the controller |
| Generator set stops suddenly | Generator set in the OFF mode | Press the RUN button to start the engine or press AUTO to allow remote starting |
| Generator set stops suddenly | Remote stop command received from a remote switch, ATS, or OnCuer Plus | Check the remote switch position. Check OnCue Plus |
| Generator set stops suddenly | Engine malfunction | Contact an authorized Kohler distributor/dealer |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Air cleaner clogged; Battery weak or dead; Battery connection poor; Spark plug wire connection loose. See the table for the matching fixes.
Documented causes: Low oil pressure shutdown; Out of fuel; Overcrank shutdown; Auxiliary winding circuit breaker tripped. See the table for the matching fixes.
Documented causes: Battery weak or dead; Battery connections reversed or poor; Fault shutdown; Generator set in the OFF mode. See the table for the matching fixes.