Troubleshooting Chart - Pentair MYERS MCI033 Notice D'utilisation

10. Insert the float rod in the hole in the tether strap.
11. Reinstall the pump in the sump, check all piping connec-
tions, and reconnect the power. Run the pump through
one complete operating cycle to check for proper opera-
tion. Failure to make this operational check may lead to
flooding and will void the warranty.
AIRlOCkS
When a pump airlocks, it runs but does not move any water.
An airlock will cause the pump to overheat and fail. These
pumps have a built in anti-airlock hole. See the exploded view
on the repair parts page for the location of the hole. Leakage
from the anti-airlock hole is normal.
If you suspect an airlock, unplug the pump, clean out the anti-
airlock hole with a paper clip or a piece of wire, and restart
the pump.

TROUBlESHOOTING CHART

SYMPTOM
Pump won't start
or run.
Pump starts and stops
too often.
Pump won't shut off.
Pump operates but
delivers little or no
water.
PROBABlE CAUSE(S)
Blown fuse.
Low line voltage.
Defective motor.
Defective float switch.
Impeller.
Float is obstructed.
Backflow of water from
piping.
Faulty float switch.
Defective float switch.
Restricted discharge
(obstacle in piping).
Float obstructed.
Low line voltage.
Something is caught in
impeller.
Anti-airlock hole is plugged.
Figure 1: Connect switch as shown. Do not disturb the spade
terminals on the switch. The gasket has been omitted for clarity.
CORRECTIVE ACTION
If blown, replace with a fuse of proper size.
If the voltage is under the recommended minimum, check the size
of the wiring from the main switch on the property. If OK, contact
power company or hydro authority.
Replace the pump.
Replace the float switch.
If the impeller won't turn, remove the lower pump body and locate
the source of the binding.
Remove the obstruction.
Install or replace the check valve.
Replace the float switch.
Replace the float switch.
Remove the pump and clean the pump and piping.
Remove the obstruction.
If the voltage is under the recommended minimum, check the size
of the wiring from the main switch on the property. If OK, contact
power company or hydro authority.
Clean out the impeller.
Turn off the pump, clean out the anti-airlock hole, and restart pump.
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