TROUBLESHOOTING
764 Controller - Error Codes & 278 "L" with Check Salt Light
Problem
Cause
Correction
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 camshaft. Camshaft should be rotating to
find Home 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 during ERR 3
display.
Check that motor is connected.
Verify that motor wire harness is connected to motor and
controller module.
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:
—Wire harness, Motor and Optical Sensor Assembly
—Controller
Camshaft on tank 1 is turning for more 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 indefinitely, replace the
following components in this order:
—Wire harness, Motor and Optical Sensor Assembly
—Controller
Regeneration starts but control shows Err3
before completing regeneration
Verify that the correct valve is selected in the Logix
controller.
ERR 4 is displayed
If single tank system...
Verify system setting is programmed to 273/278 "L".
Controller on tank 2 does not know the position
of the camshaft. Camshaft should be rotating to
find Home position.
Wait for two minutes for the controller to return to the
Home position. The hourglass should be flashing on the
display indicating the motor is running.
Camshaft on tank 2 is not turning during ERR 4
display.
Check that motor is connected.
Verify that motor wire harness is connected to motor and
controller module.
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:
—Wire harness, Motor and Optical Sensor Assembly
—Controller
Camshaft on tank 2 is turning more 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 indefinitely, replace the
following components in this order:
—Wire harness, Motor and Optical Sensor Assembly
—Controller
Four dashes displayed:
— — : — —
Power failure occurred
Press SET to reset the time display.
Check Salt Light is displayed -
Press the regen button to turn
off the check salt light.
No regenerant draw or insufficient regenerant
detected during regeneration.
Ensure salt/regenerant is available.
Check for regenerant draw.
Inspect regenerant line for leaks.
AUTOTROL
®
Logix 764 Control Performa Cv Series Valves (273, 278) Service Manual
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