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Problem
Hard water
Excessive salt
consumption
Controller cycles
continuously
Loss of water pressure
Loss of mineral through
drain line
Iron in conditioned water
Ref. MKT-IM-010 / F - 16.01.2023
Cause
By-pass valve is open.
No salt is in brine tank.
Injector screen plugged.
Insufficient water flowing into
brine tank.
Leak at the distributor tube.
Internal valve leak.
Improper salt setting.
Excessive water in brine tank.
Maladjusted, broken or shorted
micro-switch.
Iron buildup in line to water
softener.
Iron buildup in water softener.
Inlet of softener plugged due to
foreign material broken loose
from pipes by recent work done
on plumbing system.
Air in water system.
Improperly sized drain line flow
control.
Fouled mineral bed.
Installer manual Fleck 3150 NXT/NXT2 - Troubleshooting
Solution
Close by-pass valve.
Add salt to brine tank and
maintain salt level above water
level.
Clean injector screen.
Check brine tank fill time and
clean brine line flow control if
pugged.
Make sure distributor tube is not
cracked. Check o-ring and tube
pilot.
Replace seals and spacers and/or
piston.
Check salt usage and salt setting.
See problem "Excessive water in
brine tank" below.
Determine if micro-switch or
controller is faulty and replace it,
or replace complete power head.
Clean line to water softener.
Clean the system and add mineral
cleaner to mineral bed. Increase
frequency of regeneration.
Remove piston and clean the
valve.
Assure that well system has
proper air eliminator control.
Check for dry well condition.
Check for proper drain rate.
Check backwash, brine draw and
brine tank refill. Increase
frequency of regeneration.
Increase backwash time.
161 / 190
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