Grundfos SB 3-25, Инструкция по установке и эксплуатации

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English (GB)
11
8. Fault finding the product
See also the quick guide.
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before you
start any work on the product. Make
sure that the power supply cannot be
accidentally switched on.
Fault Cause Remedy
1. The pump does not
run. a) The fuses in the electrical
installation are blown. Replace the fuses. If the new fuses blow
too, check the electrical installation and
the power cable.
b) The residual-current circuit
breaker, RCCB, has tripped.
Cut in the circuit breaker.
c) No power supply. Contact the power supply company.
d) The motor protection has cut off
the power supply due to overload. Check if the pump is blocked.
SB and SBA only:
1. Switch off the power supply to the
pump.
2. Remove the rubber plug. See figs 1 to
3 (25) in the appendix.
3. Try to turn the pump shaft with a
screwdriver.
4. If the pump shaft is stuck, follow the
instructions in point 1 , h .
Note: Remember to refit the rubber plug.
e) The pump or the power cable is
defective.
Repair or replace the pump or cable.
f) The float switch is in dry-running
position. Check the water level and the float switch
for free movability.
Note: If the tank is empty, and the float
switch is often in this position, install a
larger tank.
g) SBA: The dry-running protection of
the pump has stopped the pump. Check the water level.
Switch off the power supply and wait 2
min before switching it back on.
h) The pump is blocked. Check and clean the pump.
1. Switch off the power supply to the
pump.
2. Remove the screws at the bottom of
the pump with a cross-head
screwdriver. See figs
1 and 2 (84b)
and fig. 3 (115) in the appendix.
3. Remove the pump base. See figs 1
and 2 (56) and fig. 3 (104) in the
appendix.
4. Clean the inlet strainer and hydraulic
parts with a brush and a water jet.
5. Reassemble the pump.