Amiad Water Systems | 2019
TEQUATIC™ PLUS F-150 Filter, C-series Skid
38
Maintenance
5.2 Troubleshooting
The following is a list of common troubleshooting scenarios. Where applicable, inspections and/or
resolutions are listed by order of ease of completion or likelihood of occurrence.
Problem
Possible Cause
Solution
Elevated
differential
pressure
Insufficient cleaning of filter
membrane
•
The frequency and/or duration of the forward spin
cycles may be insufficient.
•
The brushes may be worn and need replacement.
•
The filter membrane may be worn and need
replacement.
•
The process water may need enhanced cleaning
using a CIP kit
Excessive filtrate flow
Excessive flow rate can cause an elevated pressure
differential. Reduce the flow rate according to system
optimization described on
Process water solids
concentration too high
•
A periodic spike in influent solids may be cleared
with an extra cleaning cycle.
•
Frequent spikes in influent solids may require a
larger feed tank to equalize solids loading.
•
Frequent or steady elevated solids may require a
reduction in the filtrate flow rate.
•
Increase concentrate purge frequency and/or purge
duration.
Check the speed of the
cleaning/brush assembly.
•
If the brush speed is higher than normal it is an
indication that the total flow rate is too high.
•
Worn or missing brushes can cause the brush speed
to be high but not cleaning. Replace the cleaning
assembly or brushes.
•
High velocity water flow (high brush speed) can
cause an artificially elevated differential pressure
that is not reflective of the actual flow.
Pressure sensors may be faulty
•
Bleed sensor lines then ensure the bleed valves are
closed.
•
Inspect the pressure transmission tubes for leaks,
kinks, and air bubbles.
•
Diagnose and/or replace the sensor.
Low differential
pressure
Insufficient water flow
A low flow rate across the filter will show as a low
differential pressure.
Breach in filter element
Replace filter element.
Zero reading
•
Inspect the pressure transmission tubes for leaks,
kinks and air bubbles.
•
Ensure sensor bleed valves are closed
•
Inspect the sensor wires for an open circuit.
•
Diagnose and/or replace the sensor.
Low filtrate flow
No flow
•
Make sure that all feedwater and filtrate valves that
should be open are open.
•
Make sure that all concentrate and maintenance
valves that should be closed are closed.
•
Inspect filter for wear and clogging
Limited flow
•
Check the filtrate flow diaphragm valve
•
If the differential pressure is high, inspect the filter
for blockage.
•
If the differential pressure is low, make sure the
feed pump (if present) and recirculation pump are
functioning.
