English (GB)
23
21. Fault finding
22. 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.
Subject to alterations.
Warning
Before starting fault finding, switch off the power supply. Make sure that the power supply cannot be accidentally
switched on.
Fault
Cause
Remedy
1.
No rainwater is supplied
to the buffer tank even
though the collecting
tank contains rainwater.
a) The feed pump is malfunctioning.
See installation and operating instructions for
the feed pump.
b) The feed pump has not been set to "Auto".
Set the feed pump to "Auto".
See section
c) The feed pump discharge pipe is blocked or
cracked.
Remove blockage, or replace the pipe.
d) Level sensor in collecting tank malfunctioning.
Check input from collecting tank level sensor on
the status display.
See section
Check sensor connections and sensor
operation. Replace the sensor, if necessary.
e) Level sensor in buffer tank malfunctioning.
Check input from buffer tank level sensor on the
status display.
See section
Check sensor connections and sensor
operation. Replace the sensor, if necessary.
f)
Overload trip operated.
2.
The booster pump is
running, but the
discharge pressure is
low.
a) Air in the booster pump.
Take the system out of operation by switching
the main switch off.
Slacken the vent screw on the back of the pump
sleeve and wait until airless water comes out.
Retighten the screw.
3.
No rainwater is available,
but mains water is not
being supplied to the
buffer tank.
a) The mains water valve has not been set to "Auto".
Set the mains water valve to "Auto".
See section
b) The mains water valve is malfunctioning.
Check whether the valve is blocked by
impurities, and clean it, if necessary.
Replace the valve, if necessary.
c) User-defined alarm is activated.
15.4 User-defined alarms (4.4)
and
4.
The booster pump is
unable to reach the
setpoint.
a) The consumption is too high.
Reduce the consumption, if possible.
b) Pipe fracture or leakage in the system.
Check the system, and repair, if necessary.
5.
No connection to
Ethernet.
a) Wrong host name.
Check the host name.
See section
