Table of Contents
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5.3.1
Gauge Problems-................................................................................................................51
5.3.2
Low Pump (s) Pressures- ...................................................................................................51
5.3.3
High Pump Pressures-........................................................................................................52
5.3.4
Differential pressure too High or too Low- .......................................................................52
5.3.5
Filter Back Wash Failures- ................................................................................................52
5.4
Frequent pump seal Failures- ....................................................................................................59
5.5
Issues with Actuators and Solenoids-........................................................................................60
5.5.1
Actuator Failure-................................................................................................................60
5.5.2
Actuator Leaks-..................................................................................................................60
5.5.3
Non- Functional Solenoid Valves-.....................................................................................61
5.6
Issues with Conductivity Controllers-.......................................................................................62
5.6.1
Probe Cleaning and Calibration-........................................................................................62
5.6.2
Bleed Set Point- .................................................................................................................62
5.6.3
Dead Band Control- ...........................................................................................................62
5.6.4
Walchem-...........................................................................................................................63
5.6.5
LMI-...................................................................................................................................64
5.6.6
CHC Control Station- ........................................................................................................64
5.7
CHC Control Station Messages- ...............................................................................................65
5.7.1
No Filter Backwash (BW Failure shown on Control Panel's screen)- .............................65
5.7.2
Screen Cleaning Required Message- .................................................................................65
5.7.3
5.7.4
5.7.5
5.7.6
5.7.7
5.8
Leaks- ........................................................................................................................................68
5.8.1
O-Ring Leaks or Failure- ...................................................................................................68
5.8.2
Flange gasket Leaks-..........................................................................................................68
5.8.3
Plumbing Leaks or Failure- ...............................................................................................68
5.8.4
Valve Leaks or Failure- .....................................................................................................68
5.8.5
Internal Valve Leaks-.........................................................................................................68
5.8.6
Vacuum Leaks- ..................................................................................................................68
5.9
Algae and Biofilms- ..................................................................................................................69
5.9.1
Algae growing in tower in sunlit areas-.............................................................................69
5.9.2
Biofilms- ............................................................................................................................69
5.10
Scale- .....................................................................................................................................70
4
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