Pump running,
valves open?
Turn on pump
and/or open
valves
No Flow
LED ON
YES
Flow switch
plumbed correctly,
arrows pointing in
the direction of
water flow
NO
Flow switch
wire damaged?
NO
NO
Replace
switch
YES
Re-align
switch
NO
Remove
blockage,
backwash
YES
YES
Flow blocked,
pump pressure
increased
YES
YES
LED Off after
60 seconds
LED Off after
60 seconds
LED Off after
60 seconds
LED Off after
60 seconds
LED Off after
60 seconds
Test with
known good
switch held
closed
Replace
PCB
B
Go to
B
YES
YES
NO
NO
Problem
solved
NO
NO
NO
YES
No Flow LED ON Troubleshooting Chart
Page 26
Replace
switch
