146
UnclassifiedCooling
What This Code Means
Engine oil pressure is below the low oil pressure shutdown threshold; Engine coolant temperature has exceeded the alarm (warning) threshold for high coolant temperature; Engine Coolant Temperature High (Warning); Engine Coolant Temperature High (Shutdown); Engine has begun to overheat; Engine coolant temperature has risen to an unacceptable level; Engine is operating near cooling system capacity; Engine has overheated; Coolant temperature has risen above the shutdown trip point; Coolant level is low
Possible Causes
- •Blocked enclosure air discharge
- •Blocked radiator
- •Broken or loose fan belt
- •Collapsed, distorted, or leaking upper and lower radiator hoses
- •Contaminated coolant and scale
- •Coolant leakage
- •Coolant level below specification
- •Coolant level is below specification
- •Cooling system components are damaged or obstructed
- •Damaged fan shroud or air recirculation baffles
- •Damaged radiator cap and gasket or improper pressure operation
- •Damaged, worn, or improperly tensioned fan belt(s), pulleys, or belt tensioner
- •Enclosure air intake blocked
- •External contaminants on cooling system components
- •External leak
- •High ambient temperature
- •Higher ambient temperature
- •Increase in load
- •Low coolant level
- •Low lubricating oil level
Suggested Actions
- 1Add coolant as necessary.
- 2Allow the engine to cool down completely before proceeding with checks.
- 3Check coolant level and add coolant if applicable.
- 4Check the coolant level and replenish if low.
- 5Check the oil level. Add or drain oil, if necessary.
- 6Contact your local dealer if a leak is present.
- 7Inspect cooling system components for external contaminates and clean as required.
- 8Inspect enclosure air discharge for dirt, debris, or obstructions and remove blockage or snow/ice buildup if applicable.
- 9Inspect radiator for dirt, debris, or obstruction and remove blockage.
- 10Inspect the engine and surrounding area for external oil leaks.
- 11Inspect the engine, cooling system, and surrounding area for external coolant leaks.
- 12Inspect the fan belt(s) for damage, wear, and proper tension. Inspect pulleys and belt tensioner for damage or wear. Contact your local dealer if repair or replacement is required.
- 13Inspect the fan shroud and air recirculation baffles for damage and clearance. Contact your local dealer if repair or replacement is required.
- 14Inspect the radiator cap and gasket for damage and proper pressure operation. Contact your local dealer if repair or replacement is required.
- 15Inspect upper and lower radiator hoses for collapse, distortion, or fluid leaks. Contact your local dealer if repair or replacement is required.
- 16Look for possible coolant leakage points and repair if necessary.
- 17Open the radiator cap and inspect for contaminated coolant and scale. Contact your local dealer if flushing of cooling system is required.
- 18Reduce loads or recirculation of discharge air to generator in elevated ambient.
- 19Reduce loads or recirculation of discharge air to generator set.
- 20Review fault code 151 correction list for other possible causes.
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