Brand: KOHLER
Category: Portable Generator
Document Type:
Language: EN
Manual for 14/20RESA - Troubleshooting and error codes + PDF Download
Uploaded: April 8, 2025, 1:57 p.m.
Manual Publish Date: 2011-12-01
Warranty Summary
None
The KOHLER 14/20RESA generator set operation involves:
- Starting: Press the RUN button for local start, or AUTO for automatic start based on utility power status.
- Stopping: Press the OFF button.
- Automatic Operation: In AUTO mode, the generator starts automatically upon utility power loss and stops when power is restored.
- Exercise Mode: Set up weekly or bi-weekly exercises to maintain engine and alternator condition. Options include unloaded cycle, unloaded full-speed, and loaded full-speed exercises.
- Fault Management: The controller displays warnings and shutdowns with fault messages, requiring reset after fault correction.
Troubleshooting and error codes
| Fault | Warning (W) or Shutdown (SD) | Condition | Check |
|---|---|---|---|
| Generator Frequency High | SD * | Governed frequency exceeds 110% of the system's frequency setpoint for more than 10 seconds. Function becomes active 10 seconds after engine start (10 second inhibit). | Contact an authorized distributor/dealer for service. |
| Generator Frequency Low | SD * | Governed frequency falls below 90% of the system frequency setting for more than 10 seconds, or 1 Hz below the system frequency setting for more than 60 seconds. Function becomes active 10 seconds after engine start (10 second inhibit). | Reduce the load and restart the generator set. Contact an authorized distributor/dealer for service. |
| Generator VoltageL1-L2 High | SD * | Generator voltage high. Output voltage exceeds 120% of the system nominal voltage for more than 2 seconds. | Contact an authorized distributor/dealer for service. |
| Generator VoltageL1-L2 Low | SD * | Generator voltage low. Output voltage falls below 80% of the nominal system voltage for more than 10 seconds. | Reduce the load and restart the generator set. Contact an authorized distributor/dealer for service. |
| Lo Crank Vlt | W | Low cranking voltage. Battery voltage falls below 8 VDC for more than 6 seconds while the starter is engaged. | Charge or replace the battery. |
| Locked Rotor | SD | No engine rotation is sensed during cranking. Shuts down 3 seconds after the fault is detected. | Check the battery. Check for loose connections. Contact an authorized distributor/dealer for service. |
| MainPwrOverL Shutdown | SD | Main power overload. An over current fault on the 70 controller power output (short circuit). | Contact an authorized distributor/dealer for service. |
| Not in Auto | W | The generator set is not in Automatic (standby) mode. Remote start and stop commands from a transfer switch or remote switch will be ignored. | Contact an authorized distributor/dealer for service. Press AUTO to place the generator set in Automatic mode, when appropriate. |
| Over Crank | SD | Three unsuccessful starting attempts. | Check the fuel supply, spark plug, and battery. Check for loose connections. Contact an authorized distributor/dealer for service. |
| Speed Sensor Fault | SD | Engine speed sensor has failed or engine stalled. | Contact an authorized distributor/dealer for service. |