English (GB)
24
9. Fault finding
.
Warning
Before removing the control box cover, make sure that the power supply has been switched
off for at least 5 minutes.
The pumped liquid may be scalding hot and under high pressure. Before any removal or
dismantling of the pump, the system must therefore be drained, or the isolating valves on
either side of the pump must be closed.
Fault
Cause
Remedy
1.
The pump is not
running. None of the
indicator lights are on.
a)
One fuse in the installation is
blown.
Replace the fuse.
b)
The current-operated or voltage-
operated circuit breaker has
tripped out.
Cut in the circuit breaker.
c)
The pump is defective.
Repair or replace the pump.
2.
The pump is not
running. The green
indicator light is
flashing.
The pump has been stopped in one of
the following ways:
1. With the button.
2. With the R100.
3. External on/off switch in position
off.*
4. Via bus signal.*
1. Start the pump by pressing .
2. Start the pump with the R100 or
by pressing .
3. Switch on the on/off switch.*
4. Start the pump via bus signal.*
*The fault can be temporarily corrected by selecting max. curve duty on the
pump or with the R100 as external forced-control signals will be ignored.
3.
The pump has stopped
due to a fault.
The red indicator light is
on, and the green
indicator light is off.
a)
Power supply failure
(for example undervoltage).
Check that the power supply falls
within the specified range.
b)
Pump blocked and/or impurities in
the pump.
Remove the vent screw, turn the
rotor with a screwdriver inserted into
the slot in the shaft end, and/or
dismantle and clean the pump.
c)
Fault in electronics.
Contact Grundfos.
4.
The pump is operating,
but has been stopped
due to a fault.
The red and green
indicator lights are on.
a)
The pressure and temperature
sensor is defective.
Check sensor connection.
Replace if necessary.
b)
The pump has restarted
automatically after a temporary
fault.
Reset the fault indication.
5.
The pump has been set
to stop, but it has been
stopped due to a fault.
The red indicator light is
on, and the green
indicator light is flashing.
a)
The pressure and temperature
sensor is defective.
Check sensor connection.
Replace, if necessary.
b)
The pump has restarted
automatically after a temporary
fault.
Reset the fault indication.
6.
Noise in the system.
The green indicator light
is on.
a)
Air in the system.
Vent the system.
b)
The flow is too high.
Reduce the head (setpoint), and
possibly change over to constant
pressure.
c)
The pressure is too high.
Reduce the head (setpoint), and
possibly change over to proportional
pressure.
7.
Noise in the pump.
The green indicator light
is on.
a)
Air in the pump.
Vent the pump.
b)
The inlet pressure is too low.
Increase the inlet pressure, and/or
check air volume in the expansion
tank (if installed).
Summary of Contents for UPE 100-120 F
Page 2: ......
