Grundfos PM Rain, Инструкция по установке и эксплуатации

Страница: 13 / 20

English (GB)
13
12. Fault finding
Warning
Before starting work on the pump/PM Rain, make sure that the power supply has been
switched off and that it cannot be accidentally switched on.
Fault Cause Remedy
1. The pump runs
continuously. a) Air lock in the system. Release air from the system.
Open valves (taps, flush toilets, operate
washing machine) from nearest to
furthest outlet. Repeat, if necessary.
b) The pump cable plug is inserted
directly into the power supply socket. Insert the pump cable plug into the
PM Rain and the PM Rain plug into the
power supply socket.
c) Water is still being used. Check all taps, toilets, and appliances
connected to the PM Rain to ensure that
they are turned off. If the pump does not
stop, switch off the pump, and check the
discharge pipe for leaks.
d) Water is leaking on the discharge side. Check for leaks.
e) The start pressure is set too high. Decrease the start pressure.
See section 5.1 DIP switches.
f) The non-return valve is stuck in open
position. Clean or replace the valve.
g) The PM Rain is defective. Repair or replace the PM Rain.
2. The green "Pump
on" indicator light is
on, but the pump
does not start. a) The power supply to the pump is
disconnected after the PM Rain. Check the plug and cable connections.
b) The motor protection of the pump has
tripped due to overload. Check if the pump is blocked.
c) The pump is defective. Repair or replace the pump.
d) The PM Rain is defective. Repair or replace the PM Rain.
3. The pump does not
start when water is
consumed. "Pump
on" is off. a) Too big difference in height between
the PM Rain and the tapping point. Adjust the installation, or increase the
start pressure.
See section 5.1 DIP switches.
b) The PM Rain is defective. Repair or replace the PM Rain.
c) The pump cable plug is not inserted
into the PM Rain. Check the plug and cable connections.
d) No power supply. No light in Rain
water or Mains water indicator lights. Contact an electrician, or restore the
power supply.
4. Frequent starts and
stops. a) DIP switch 5 set to "ON".
Note: For system without pressure
tank. Set DIP switch 5 to "OFF".
See section 5.1 DIP switches.
b) Leakage in the pipework. Check and repair the pipework.
c) The non-return valve is stuck in open
position. Clean or replace the non-return valve.
d) The pressure tank has no precharge
pressure, or the tank size is
insufficient.
Note: For system with pressure tank. 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.
5. The pump does not
stop. a) The pump cannot deliver the
necessary discharge pressure. Replace the pump.
b) The start pressure is set too high. Decrease the start pressure.
c) The PM Rain is defective. Repair or replace the PM Rain.
d) The non-return valve is stuck in open
position. Clean or replace the non-return valve.