2977

Possible Causes

• •Configurable Input Active State Selection parameter is configured incorrectly
• •Coolant sender incorrectly wired
• •Coolant sender incorrectly wired (short or open circuit from coolant sensor to discrete configurable input)
• •Cooling system hose is collapsed, restricted, or leaking
• •Faulty Coolant Level Sensor
• •Faulty Extension Harness-Coolant Level Sensor
• •Faulty coolant level sender
• •Incorrect 'Configurable Input Active State Selection' parameter setting
• •Low Coolant
• •Low coolant
• •The 'Configurable Input Active State Selection' parameter is configured incorrectly

Suggested Actions

1. 1Check for improper wiring (short or open circuit) from the coolant sensor to the discrete configurable input on the base board that was configured for 'Low Coolant Level 2 Switch' and correct the wiring
2. 2Disconnect the extension harness connector from the control
3. 3Go to Setup > Configurable I/O > on the operator panel and set the 'Configurable Input Active State Selection' parameter appropriately for the Configurable Input that was configured to 'Low Coolant Level 2 Switch'
4. 4If coolant is below 1 in. (2.54 cm) from the top of the radiator, add manufacturer's prescribed coolant
5. 5Inspect for dirt or debris in or on the connector pins
6. 6Inspect for evidence of moisture in or on the connector
7. 7Inspect for missing or damaged connector seals
8. 8Inspect the extension harness and extension harness connector pins for corroded, bent, broken, pushed back, or expanded pins
9. 9Inspect upper and lower radiator hoses for collapse, distortion, or fluid leaks
10. 10Perform the checks in Generator Set Sensors
11. 11Remove radiator cap and check that coolant is up to the required level
12. 12Replace radiator hose if damaged or worn
13. 13Stop the engine and allow the engine to cool down
14. 14Through the operator panel, check and ensure the correct switch input setting (active closed or active open) for the Configurable Input configured to 'Low Coolant Level 2 Switch'
15. 15Visually inspect that engine coolant is at the appropriate level through the sight glass or expansion tank

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