2746
UnclassifiedCooling
What This Code Means
Test Warning; Battery is >16V or charge current is >600mA at end of 18 hour charge cycle; Low fuel pressure; High fuel level warning; Warning on a configured IO Extender Digital Input; Low coolant detected; High oil temperature; Low oil level; Check Engine warning (emissions certified gas units)
Possible Causes
- •Writing “1” to Modbus reg 1625
- •Battery may be bad
- •Fuel pressure falls below 5.2 in H2O +/- 0.4 in (below 0.19 psi)
- •Fuel level rises above the dealer adjustable setpoint (0-99%) for 1 second
- •Digital Input status triggered the alarm
- •Low coolant digital input detected low coolant for greater than 5 seconds
- •Oil temperature is > 320 °F (160 °C) while the engine is running
- •Oil level is below limit, detected after a 60 sec hold-off since startup
- •O2 sensor exists and is faulted (O2 sensor stuck open/closed) for 90 seconds
Suggested Actions
- 1Warning will auto-clear after 60 seconds. Power cycle controller
- 2Problem 30 – Inspect Battery* page 139
- 3Refer to 'Problem 34 – Low Fuel Pressure' page 141
- 4Check Fuel Level
- 5Review alarm log and address active alarms
- 6Refer to 'Problem 26 – Low Coolant Level' page 138
- 7Refer to 'Test 115 – Oil Temperature Sensor (OTS) Resistance' page 179
- 8Refer to 'Problem 28 – Low/High Oil Pressure' page 138
- 9Engine runs with no O2 sensor faults (stuck open/closed) for 4 minutes to clear warning
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