5–1
T-378
SECTION 5
ALARMS AND TROUBLESHOOTING
5.1 Alarms
The EES monitors several parameters. If the EES fails to perform a successful regeneration, an alarm will be sent
to alert the technician of the likely cause. This will aid in troubleshooting the system. Alarms generated by the EES
are displayed as an Amber light on the EES Service Light, refer to
In order to read alarms, you will need to utilize the ECM Service Tool. Refer to
setup and use this tool.
Alarm conditions where the EES becomes inoperable will initiate a 250 hour timer. After 250 hours, the unit will
shut down until the system is repaired by a qualified technician. Once the alarm condition is corrected, the EES
Service Light will go from Amber to Green and the timer will be reset.
Alarm Name
Cause / Troubleshooting
1
Back Pressure
Exceeded
The system needs to regenerate but has not been able to.
The back pressure is above the threshold limit where the system can
automatically or manual safely regenerate 120 in/H2O (30 kPa).
The EES has entered service mode.
Take out the filter and perform a manual cleaning.
Check for other alarms in queue and inspect the EES.
2
High Back Pressure
Back pressure is above the threshold limit where the system can
automatically and safely regenerate 80 in/H2O (15kPa).
The EES has entered manual mode.
Activate a manual regeneration. Refer to
.
Check for other alarms in queue and inspect the EES.
3
Low Back Pressure
The back pressure has been less than 4 in/H2O (1 kPa) for more than four
hours while the START/RUN/OFF switch has been active.
Check the back pressure hose for cracks, leakage, or blockage.
Replace the hose if damage is found.
4
Back Pressure Offset
Out of Range
Check the back pressure hose for cracks, leakage or blockage.
Replace the hose if damage is found.
Verify back pressure by comparing an analog gauge to the transducer
reading on the ECM Service Tool. Refer to
5
250 Hour Service Mode EES SERVICE REQUIRED, a 250 hour countdown timer will initiate.
The time remaining before unit shutdown will be displayed on the ECM
Service Tool. Refer to
.
Once the timer reaches zero, the unit will not run until the EES is repaired.
12
ECM Voltage Low
Voltage at the ECM is less than 10 Volts for 60 seconds.
Inspect the connector and wires supplying power to the system.
Replace the connector if damaged or corroded. Repair damaged wires.
17
Low Oil Pressure
Sensor Not Connected
to ECM
Digital input 3 (Engine run signal) is low and the engine has been detected
running for more than 15 seconds and the alarm has been active for more
than three seconds.
Check the connection at the ECM. Replace the ECM if necessary.
19
Filter Inlet Temp
Filter Inlet Temperature is less than -100°C or more than 1100°C at any time.
Inspect Filter Inlet Temperature Sensor (ESFIT). Refer to
Replace if necessary.
