Pentair Autotrol 255 Installer Manual page 81

Issue
No brine in brine tank.
No conditioned Injector plugged.
water after
regeneration.
Air check valve closes prematurely.
Backwashes or Incorrect drain control used.
purges at
Foreign matter affecting valve
excessively low or
operation.
high rate.
Bypass valve in bypass.
No water flow Meter probe disconnected or not fully
display when connected to meter housing.
water is flowing on
760 controller.
Restricted meter turbine rotation due
to foreign matter in meter.
Improper regeneration.
Incorrect brine setting.
Run out of Incorrect hardness or capacity
conditioned water settings.
between
regenerations.
Water hardness has increased.
Restricted meter turbine rotation due
to foreign matter in meter.
Brine valve disc 1 being held open by
foreign matter.
Valve disc 2 not closed during brine
draw causing brine refill.
Brine tank
overflow. Air leak in brine line to air check.
Improper drain control for injector.
Drain control clogged with resin or
other debris.
Ref. MKT-IM-021 / A - 20.02.2019
Installer Manual 255/LOGIX 742-762-764 - Troubleshooting
Cause Reset and recovery
Add brine to brine tank.
Clean injector and screen.
Put controller momentarily into brine
cycle (C2).
Replace or repair air check if needed.
Replace with correct size controller.
Remove drain control and clean ball
and seat.
Shift bypass valve to non-bypass
position.
Fully insert probe into meter housing.
Remove meter housing, free up
turbine and flush with clean water.
Turbine should spin freely. If not,
replace meter.
Control brine dosage set and repeat
regeneration.
Set P6 to proper level.
See 6.3.1.9 Amount of salt used per
regeneration, page 48.
Set to correct values.
See 6.3. Basic programming, page 46.
Set hardness to new value.
See 6.3.1.11 Hardness (762 controller
only), page 48.
Remove meter housing, free up
turbine and flush with clean water.
Turbine should spin freely. If not,
replace meter.
Manually operate valve stem to flush
away obstruction.
Flush out foreign matter holding disc
open by manually operating valve
stem.
Check all connections in brine line for
any leaks.
Use of small drain control with larger
injector will reduce draw rates.
Clean drain control.
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