Installer Manual 255/LOGIX 742-762-764 - Troubleshooting
Ref. MKT-IM-021 / A - 20.02.2019 79 / 92
ERR 4
Controller on tank 2 does not know the
position of the camshaft.
Camshaft should be rotating to find
Home position.
Wait for two minutes, the controller
will return to home position. The
hourglass should be flashing on the
display indicating the motor is running.
Camshaft on tank 2 is not turning when
ERR 4 is displayed.
Check that motor is connected.
Verify that motor wire harness is
connected to the 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, optical
sensor assembly;
• controller.
Camshaft on tank 2 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.
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, optical
sensor assembly;
• controller.
Regeneration starts but controller
shows ERR 4 before completing the
regeneration.
Verify that the correct valve is selected
in the Logix controller.
Issue Cause Reset and recovery
- - : - - Power failure occurred.
Press to reset the time.
Brine tank
overflow.
Uncontrolled brine refill flow rate.
Remove brine controller to clean ball
and seat.
Air leak in brine line to air check.
Check all connections in brine line for
any leaks.
Drain control clogged with resin or
other debris.
Clean drain control.
Flowing or
dripping water at
drain or brine line
after regeneration.
Valve stem return spring is weak. Replace the spring.
Valve disc can not close because of
debris.
Remove debris.
Err. code Cause Reset and recovery
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