35
Troubleshooting

764 Controller – Error Co des & 255 ”L” with Che ck Salt Light

Problem Possible Cause Solution
ERR 1 is displayed. Program settings have been corrupted. Press any key and reprogram Level I
settings.
ERR 3 is displayed. Controller on tank 1 does not know the
position of the camshaf t. Camshaft
should be rotating to find Hom e position.
Wait for two minutes for the controller to
return to Home position. The hourglass
should be flashing on the display
indicating the motor is running.
Camshaft on tank 1 is not turning d uring
ERR 3 display.
Check that motor is connected. Verify t hat
motor wire harness is connected to motor
and controller modu le.
Verify that optical sensor is connected
and in place.
Verify that motor gear has engaged cam
gear.
If everything is connected, try replacing in
this order:
1. Wire Harness, Motor, Optical Sensor
Assy
2. Controller
Camshaft on tan k 1 is turning m ore than
five minutes to find Home position:
Verify that optical sensor is in place and
connected to wire.
Verify that camshaft is connected
appropriately.
Verify that no dirt or rubbish is clogging
any of the cam slots.
If motor continues to rotate i ndefinitely,
replace the following components in this
order:
1. Wire Harness, Motor, Optical Sensor
Assy
2. Controller
Regeneration starts but control sh ows
Err3 before completing regeneration.
Verify that the correct valve is selected in
the Logix controller.