Troubleshooting - Pentair Autotrol 255 Series Service Manual

trouBlESHootING

The technology upon which the Series 255 control is based
is well established and proven in service over many years.
however, should a problem or question arise regarding
the operation of the system, the control can be very easily
serviced. The control module can be quickly replaced or
adjustments can be made at the installation. We recommend
that you contact your local professional water treatment dealer
for most concerns. For parts mentioned, refer to exploded
views in the Replacement Parts section of this manual.
IMPortANt: Service procedures that require the water
pressure to be removed from the system are marked with a !
after the possible cause. Refer to Preventative Maintenance
section for instructions.
Valve troubleshooting
Problem
brine tank overflow.
Flowing or dripping water
at drain or brine line after
regeneration.
hard water leakage after
regeneration.
Control will not draw brine.
14 • Autotrol
255 Valve/400 Series Service Manual
®
Cause
Uncontrolled brine refill flow rate.
Air leak in brine line to air check.
Drain control clogged with resin or other
debris.
Valve stem return spring weak.
Improper regeneration.
Leaking of external bypass valve.
O-ring around riser pipe damaged.
Low water pressure.
Restricted drain line.
Injector plugged !
Injector defective !
Valve disc 2 and/or 3 not closed.
Air check valve prematurely closed.
Correction
Remove brine control to clean ball and seat.
Check all connections in brine line for leaks. Refer
to instructions.
Clean drain control.
Replace spring. (Contact dealer.)
Repeat regeneration after making certain correct
salt dosage was set.
Replace bypass valve. (Contact dealer.)
Replace o-ring. (Contact dealer.)
Make correct setting according to instructions.
Remove restriction.
Clean injector and screen.
Replace injector and cap. (Contact dealer.)
Remove foreign matter from disc and check disc for
closing by pushing in on stem. Replace if needed.
(Contact dealer.)
Put control momentarily into brine refill. Replace or
repair air check if needed. (Contact dealer.)