User Manual

15
VII. TROUBLE SHOOTING PROCEDURES (con’t)
PROBLEM POSSIBLE CAUSES SOLUTIONS
Automatic
Backwash Fails to
Cycle
l
Controller power may
be off or circuit fuses
tripped.
l
Improper setting of
differential switch.
l
Actuator
malfunctioning.
1. Be sure wiring is connected correctly.
Replace circuit fuses. Turn on power.
Controller may be faulty and need
replacement.
2. Adjust as necessary.
3. Check connections
Media Sand
Appears
Downstream
l
Incorrect media sand
(i.e. too fine and too
small)
l
Broken, damaged, or
missing lateral.
1. Replace media with proper sized media.
2. Repair or replace laterals of the underdrain.
Backwash Valve
Leaks
l
Obstruction in the
valve seat.
l
Rubber seating is
worn or damaged.
l Actuator Diaphragm
damaged.
l Linkage out of
adjustment
1. Remove the obstruction.
2. Replace Valve.
3. Replace diaphragm.
4. Adjust linkage
Water Hammer
l
Air in tanks.
l
Long backwash line
causing vacuum.
1. Bleed off trapped air in system. Air vent on
system may be required.
2. Install vacuum breaker on backwash line.