Pentair Autotrol 255 Installer Manual page 79

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