Further Product Information; Disposal - Grundfos PM Rain Installation And Operating Instructions Manual

Fault
6. The red "Warning"
indicator light is
permanently on.
7. The red "Warning"
indicator light
flashes once per
period.
8. The red "Warning"
indicator light
flashes three times
per period, and each
pump start is
delayed a few
seconds.
9. The red "Warning"
indicator light flashes
four times per period.

13. Further product information

If you have any questions, feel free to contact the
nearest Grundfos company or service workshop.

14. Disposal

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection
services.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
14
Cause
a) Dry running. The pump needs water.
b) The power supply to the pump is
disconnected after the PM Rain.
c) The motor protection of the pump has
tripped due to overload.
d) The pump is defective.
e) The PM Rain is defective.
a) Cycling.
A tap has not been closed entirely
after use.
Note: For system without pressure
tank.
b) Cycling.
There is a minor leakage in the system.
Note: For system without pressure
tank.
c) Cycling.
The pressure tank has no precharge
pressure, or the tank size is
insufficient.
Note: For system with pressure tanks.
a) Too many start/stop sequences within
a short period.
The pressure tank has no precharge
pressure, or the tank size is
insufficient.
b) Too many start/stop sequences within
a short period.
The PM Rain is set to start/stop with
1 bar (100 kPa) differential pressure,
i.e. DIP switch 5 is set to "ON", but no
pressure tank has been installed in the
system.
a) Pressure sensor fault.
Subject to alterations.
Remedy
Check the pipework.
Check the plug and cable connections.
If the pump has a built-in circuit
breaker, check that it is switched off.
Check if the motor/pump is blocked.
Repair or replace the pump.
Repair or replace the PM Rain.
Check that all taps have been closed.
See section 8.1 Anti-cycling.
Check the system for leaks.
See section 8.1 Anti-cycling.
Check the tank precharge pressure, and
recharge the tank, if necessary.
If the size of the pressure tank is
insufficient, set DIP switch 5 to "OFF", or
replace the pressure tank.
See section 8.1 Anti-cycling.
Check the tank precharge pressure, and
recharge the tank, if necessary.
If the size of the pressure tank is
insufficient, set DIP switch 5 to "OFF", or
replace the pressure tank.
Set DIP switch 5 to "OFF".
Repair or replace the PM Rain.