Grundfos Redi-Flo4, Installation And Operating Instructions Manual

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9
TROUBLESHOOTING CHART
POSSIBLE CAUSES HOW TO CHECK HOW TO CORRECT
Check drawdown during pump
operation. Lower pump if possible. If not, throttle
discharge valve and install water level
control.
2. Discharge piping or
valve leaking. Examine system for leaks. Repair leaks.
3. Pump strainer or check
valve are clogged. Remove pump and inspect. Clean, repair, rinse out pump and
reinstall.
4. Pump worn. Same as B.2 above. If not close to pump curve, remove
pump and inspect.
1. Draw-down is larger
than anticipated.
C. Pump Runs But at Reduced Capacity
B. Pump Runs But Does Not Deliver Water
POSSIBLE CAUSES HOW TO CHECK HOW TO CORRECT
1. Groundwater level in
well is too low or well is
collapsed. Check well draw-down. Lower pump if possible. If not,
throttle discharge valve and install
water level control.
2. Integral pump check
valve is blocked. Install pressure gauge, start pump,
gradually close the discharge valve and
read pressure at shut-off. After taking
reading, open valve to its previous
position. Convert PSI to feet.
(For water: PSI x 2.31 ft/PSI = ____ ft.),
and add this to the total vertical distance
from the pressure gauge to the water
level in the well while the pump is
running. Refer to the specific pump
curve for the shut-off head for that pump
model. If the measured head is close to
the curve, pump is probably OK. If not close to the pump curve,
remove pump and inspect discharge
section. Remove blockage, repair
valve and valve seat if necessary.
Check for other damage. Rinse out
pump and reinstall.
3. Inlet strainer is
clogged. Same as B.2 above. If not close to the pump curve,
remove pump and inspect. Clean
strainer, inspect integral check
valve for blockage, rinse out pump
and reinstall.
4. Pump is damaged. Same as B.2 above. If damaged, repair as necessary.
Rinse out pump and re-install.
D. Pump Cycles Too Much
POSSIBLE CAUSES HOW TO CHECK HOW TO CORRECT
1. Pressure switch is not
properly adjusted or is
defective. Check pressure setting on switch
and operation. Check voltage across
closed contacts. Re-adjust switch or replace if
defective.
2. Level control is not
properly set or is
defective. Check setting and operation. Re-adjust setting (refer to
manufacturer data.) Replace if
defective.
3. Plugged snifter valve
or bleed orifice. Examine valve and orifice for dirt or
corrosion. Clean and/or replace if defective.