MODEL F71B/F71G/F67C/F67G/N75A/N75B
33
3.6. Trouble-Shooting
A. Control Valve Fault
A. Electrical service to
unit has been
interrupted.
B. Rinse time is set
incorrect.
C.Controller damaged.
A. Assure permanent
electrical service (Check
fuse, plug, pull chain or
switch).
B. Reset the time.
C. Check or replace the
controller.
2.Filter
supply raw
water.
A. Bypass valve is
open.
B. Riser pipe leak.
C. Interval valve leak.
A. Close the bypass valve.
B. Make sure riser pipe and
O-ring are not cracked.
C. Check or change valve
body.
A. Iron is in the water
supply pipe.
B. Iron mass is in the
filter.
A. Clean the water supply
pipe.
B. Clean valve and add filter
materials cleaning chemical,
increase frequency of
rinsing.
4. Loss of
filter
materials
through
drain line.
A. Air in the water
system.
B. The strength of
backwash is too high.
C. Strainer is broken.
A. Assure that well system is
dry and has proper air
eliminator control.
B. Reduce the strength of
backwash.
C. Replace the strainer.
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