Troubleshooting Chart - Pentair HYDROMATIC HP33M Manual Del Usuario

Operation • Maintenance • Troubleshooting
Operation / Maintenance
Risk of electric shock . Can shock, burn or
kill. Do not handle a pump or pump motor with wet
hands or when standing on a wet or damp surface, or
in water.
Before attempting to check why unit has stopped
operating, disconnect power from unit.
Risk of fire and explosion . Can cause
severe injury, property damage or death. Do not use in
explosive atmospheres. Pump water only with this pump.
1. The shaft seal depends on water for lubrication
and cooling. Do not operate the pump unless it is
submerged in water as the seal may be damaged if
allowed to run dry.
2. The motor is equipped with an automatic reset
thermal protector. If the temperature in the motor
should rise unduly, the protector will cut off all
power before damage can be done to the motor.
When the motor has cooled sufficiently, the protector

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 / tripped circuit breaker.
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.
will reset automatically and restart the motor. If
the protector trips repeatedly, the pump should be
removed and checked as to cause of difficulty. low
voltage, long extension cords, clogged impeller, very
low head or lift, etc., could cause cycling.
3. The pump will not remove all water. If a pump is
operating and suddenly no water comes out of the
discharge hose, shut the unit off immediately. The
water level is probably very low and the unit has
broken prime.
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
Repair Parts 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.
Corrective Action
If blown, replace with fuse of proper size or reset breaker.
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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