Fault Finding Chart; Disposal; Warning - Grundfos Hydro Solo-S Montage- Und Betriebsanleitung

6. Fault finding chart

Warning

Never make any connections in the
terminal box or in the pressure switch
unless the power supply has been
switched off.
Fault
1. Motor does not run
when started.
2. Motor-protective
circuit breaker has
tripped (trips
immediately when
supply is switched
on).
3. Motor-protective
circuit breaker trips
out occasionally
(three-phase
operation).
4. Booster set capacity
is not constant.
5. Booster set runs but
gives no water.
6. Pump starts and
stops too frequently.

7. Disposal

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
Cause
a) Supply failure.
b) Motor protection has tripped (in the case of single-phase operation, the
motor starts automatically after a short time).
c) Main contacts in motor-protective circuit breaker are not making contact or
the magnetic coil is faulty (three-phase operation).
a) Contacts in motor-protective circuit breaker are faulty (three-phase
operation).
b) Cable connection is loose or faulty.
c) Motor winding is defective.
d) Pump is mechanically blocked.
e) Setting of motor-protective circuit breaker too low (three-phase operation).
a) Setting of motor-protective circuit breaker too low.
b) Periodic supply failure.
c) Low voltage at peak times.
a) Suction pipe is too small for capacity of booster set.
b) Insufficient water is available at the pump inlet.
c) Water level is too low.
d) Suction pipe is partly blocked by impurities.
a) Suction pipe is blocked by impurities.
b) Leakage in suction pipe.
c) Air in suction pipe or booster set.
d) Non-return/foot valve is blocked in closed position.
a) Pressure switch setting is incorrect.
b) Tank precharge pressure is incorrect.
c) Non-return/foot valve in suction pipe does not shut tight.
d) Leakage in diaphragm of tank. Lower the tank precharge pressure. If the
diaphragm leaks, water will run out the valve when the booster set is
operating.
Subject to alterations.
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