Hydromatic DRY PIT, Инструкция по установке и обслуживанию, Страница: 9 / 12

Pump
Notes
9
2. Check valve may be partially
clogged. Raise lever up and
down to clear.
3. Pump may be running in the
wrong direction. Low speed
pumps can operate in reverse
direction without much noise
or vibration.
4. Discharge head may be too
high. Check total head with
gauge when the pump is
operating.
5. If pump has been in service for
some time and capacity falls
off, remove pump and inspect
impeller for wear.
Motor stops and then restarts
after short period but overload
heaters in starter do not trip.
1. This indicates heat sensors in
the motor are tripping due to
excessive heat. Impeller may
be partially clogged giving
sustained overload but not
high enough to trip overload
heaters.
2. Pump may be operating on a
short cycle due to faulty check
valve in the wet well.