Use and Care Manual

English (GB)
13
4. System
overpressure.
Yes
a) The maximum pressure has been
exceeded - the inlet pressure is
higher than 6 bar, 0.6 MPa (85
psi)
Check the inlet conditions.
Yes
b) The maximum pressure has been
exceeded - equipment elsewhere
in the system causes a high
pressure at the pump (e.g. water
heater or defective safety
equipment)
Check the installation.
5. The pump can be
reset, but runs only
for a few seconds.
Yes
a) Dry running or water shortage
Check the water source, and prime
the pump.
Yes
b) The inlet pipe is blocked by
impurities
Clean the inlet pipe.
Yes
c) The foot or non-return valve is
blocked in closed position
Clean, repair or replace the foot or
non-return valve.
Yes
d) Leakage in the inlet pipe
Repair the inlet pipe.
Yes
e) Air in the inlet pipe or the pump
Prime the inlet pipe and the pump.
Check the inlet conditions of the
pump.
6. The pump can be
reset, but starts
repeatedly,
immediately after
stopping.
No
a) The internal non-return valve is
defective or blocked in completely
or partly open position.
Clean, repair or replace the
non-return valve.
No
b) The tank precharge pressure is
not correct.
Adjust the tank precharge pressure to
70 % of the required outlet pressure.
Fault
Grundfos Eye Indicator light Automatic reset
Cause Remedy