E L C P r o g r a m m i n g M a n u a l
F o r m o r e i n f o r m a t i o n v i s i t : w w w. e a t o n . c o m M N 0 5 0 0 3 0 0 3 E
B - 2
B Troubleshooting
B.1 Common Problems and Solutions
The following tables list common problems and troubleshooting procedures for the ELC system.
System Operation
Symptom
Troubleshooting and Corrective Actions
All LEDs are OFF
1.
Check the power supply wiring.
2.
Check if the power supply output power capacity is sufficiently
rated for the ELC control units.
3.
Check that the supply voltage is in the allowable range and is free
of fluctuation.
4.
If the power supply is shared with other devices, disconnect the
power supply wiring to the other devices. If the LEDs on the ELC
control unit now turn ON, the capacity of the power supply is
insufficient. Add another power supply for the other devices or
increase the capacity of the power supply.
5.
If the problem can not be resolved with the instructions above,
contact the Eaton support center.
ERROR LED is
flashing
1.
A flashing ERROR LED potentially indicates one of the following
issues:
•
An invalid command,
•
A communication error,
•
An invalid operation, or missing instructions,
The corresponding error code and error step are stored in special
registers of the ELC.
Fault code: D1004
Fault step: D1137
The Fault code can be read using ELCSoft or HHP. The fault
codes are described in section B.2 of this document.
2.
If the LED is flashing rapidly and it is not possible to connect
ELCSoft to the ELC, a low 24VDC supply voltage is indicated.
Check for possible 24VDC supply overload.
3.
A steady ON LED indicates the program loop execution time is
over the preset time (D1000 preset value). Check the program and
the WDT (Watch Dog Timer).
4.
If the problem can not be resolved with the instructions above,
contact the Eaton support center
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