Troubleshooting Chart - Pentair MDC Serie Manual Del Usuario

Troubleshooting

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). Remove the pump and clean the pump and piping.
Float obstructed.
Low line voltage.
Something is caught in impeller.
Anti-airlock hole is plugged.
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 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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