Grundfos PM 1 User Manual

English (GB)
15
15.1 Fault finding, PM 1
Fault Cause Remedy
1. The green "Power
on" indicator light is
off.
a) The fuses in the electric
installation have blown.
Replace the fuses. If the new fuses also
blow, check the electric installation.
b) The earth leakage circuit breaker
or the voltage-operated circuit
breaker has tripped out.
Cut in the circuit breaker.
c) No power supply. Contact the power supply authorities.
d) The pressure manager is
defective.
Repair or replace the pressure manager.*
2. The green "Pump
on" indicator light is
on, but the pump
does not start.
a) The power supply to the pump has
been disconnected.
Check the plug and cable connections,
and make sure the built-in circuit breaker
of the pump is switched off.
b) The motor protection of the pump
has tripped out due to overload.
Check if the motor or pump is blocked. If
so, remove the blockage.
c) The pump is defective. Repair or replace the pump.
d) The pressure manager is
defective.
Repair or replace the pressure manager.*
3. The pump does not
start when water is
consumed. The
"Pump on"
indicator light is off.
a) Too big difference in height
between the pressure manager
and the tapping point.
Adjust the installation, or select a
pressure manager with a higher start
pressure.
b) The pressure manager is
defective.
Repair or replace the pressure manager.*
4. Frequent starts and
stops.
a) Leakage in the pipework. Check and repair the pipework.
b) Leaky non-return valve. Clean or replace the non-return valve.*
c) A valve close to the PM 1 outlet
has been closed.
Open the valve.
5. The pump does not
stop.
a) The pump cannot deliver the
necessary outlet pressure.
Replace the pump.
b) A pressure manager with too high
start pressure is installed.
Select a pressure manager with a lower
start pressure.
c) The pressure manager is
defective.
Repair or replace the pressure manager.*
d) The non-return valve is stuck in
open position.
Clean or replace the non-return valve.*
6. The red "Alarm"
indicator light is
permanently on.
a) Dry running. The pump needs
water.
Check and replace the pipework, if
necessary.
b) The power supply to the pump has
been disconnected.
Check the plug and cable connections,
and make sure the built-in circuit breaker
of the pump is switched off.
c) The motor protection of the pump
has tripped out due to overload.
Check if the motor or pump is blocked. If
so, remove the blockage.
d) The pump is defective. Repair or replace the pump.
e) The pressure manager is
defective.
Repair or replace the pressure manager.*
7. The red "Alarm"
indicator light is
flashing.
a) Cycling. A tap has not been closed
entirely after use.
Make sure that all taps have been closed.

Grundfos PM 1 Specifications

General

Brand	Grundfos
Model	PM 1
Category	Controller
Language	English