Carrier UG 15 Tier 4, Operation And Service Manual

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T-378 5–2
20 Temp Sensor Drift One of the three temperature sensors differs more than +/-15°C from the
average temperature of all the temperature sensors.
Check the temperature value of all the temperature sensors using the ECM
Service Tool. Refer to Section 4.5 .
Look for a temperature sensor that differs more than +/-15°C from the
average temperature and replace that sensor.
Temperature sensor drift is checked five hours after the ignition has been
switched off.
21 Frequent Regenerations The system is regenerating too frequently. The filter and DOC need to be
checked and cleaned if necessary.
The alarm is activated when the time measured between two regenerations
started on back pressure gets below two hours.
Alarm is cleared again when it is above two hours.
33 AR No Temperature
Rise
The EES is in Start-up mode and did not reach regeneration mode three times
in a row because of:
• Timeout in Start-up mode
• Too low Filter Inlet Temperature
• Too high Filter Outlet Temperature
Inspect EES components for proper functionality using manual regeneration.
Refer to Section 4.3 .
Repair components as required.
34 Check Fuel Pump
Circuit
Fuel Pump Current Draw is outside the acceptable range of 500 mA - 8.0
Amps when energized.
Check fuel pump operation.
Check fuse F15.
Check the connector and wiring harness for damage or corrosion.
Check the operation of the Fuel Pump with the ECM Service Tool. Refer to
Section 4.2 .
35 Check Air Control Valve The feedback from the ACV position sensor does not correspond to the
expected position.
The ACV sensor output is less than ~140mV or the output is ~+/-205 mV
away from the desired position for more than 15 seconds.
Check fuse F15.
Check the connector and wiring harness for damage or corrosion.
Remove and physically inspect the valve for obstructions.
Check the operation of the Air Control Valve (ACV) with the ECM Service
Tool. Refer to Section 4.2 .
37 Check Fuel Injector
Circuit
Fuel Injector Current Draw is outside the acceptable range of 0.5 - 6.5 Amps
when energized.
Check fuel injector operation.
Check fuse F15.
Check the connector and wiring harness for damage or corrosion.
Remove and physically inspect the injector for obstructions.
Check the operation of the Fuel Injector with the ECM Service Tool. Refer to
Section 4.2
.
Alarm Name Cause / Troubleshooting