Fault Finding The Product - Grundfos KPC 24/7 210 Instrucciones De Instalación Y Funcionamiento

6. Fault finding the product

DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before
starting any work on the product. Make
sure that the power supply cannot be
accidentally switched on.
Fault Cause
1. The pump does a)
not run.
b)
c)
2. The pump stops a)
after a short
time of
operation (the
thermal switch
b)
has tripped).
c)
3. The pump runs a)
but gives
b)
insufficient
water.
4. The pump runs a)
but gives no
b)
water.
c)
10
The power supply is switched off.
The fuses in the installation are blown.
The pump thermal switch has tripped.
See section 3.3 Thermal
also point 2.
The temperature of the pumped liquid is
higher than that stated in section
7. Technical data. The motor is
overheated.
The pump is partly or fully blocked by
impurities.
The water level is too low when the
pump is started. The pump cannot self-
prime. See sections 7. Technical
The pump is partly blocked by impurities.
The outlet pipe or hose is partly blocked
by impurities. The hose may be sharply
bent.
The pump is blocked by impurities.
The non-return valve in the outlet pipe or
hose is blocked in closed position or
blocked by impurities. The hose may be
sharply bent.
Pumps with float switch: The pump does
not stop because the free cable length of
the float switch is too long.
Remedy
Switch on the power supply.
Replace the defective fuses.
The thermal switch restarts the pump
protection. See when the motor has cooled down to
normal temperature.
The pump starts automatically after
sufficient cooling.
Clean the pump.
Move the pump to a position with
higher water level, or add water until
data. the pump starts sucking.
Clean the pump.
Check and clean the non-return valve,
if fitted. Straighten out the hose.
Clean the pump.
Check the non-return valve.
Clean or replace the valve, if
necessary. Straighten out the hose.
Reduce the free cable length.