Fault Finding Chart - Grundfos UPE 2000 Serie Manual Del Usuario

8. Fault finding chart

Before removing the terminal box cover, make sure that the electricity supply has been switched off
for at least 5 minutes. The voltage to a possible fault signal module must also have been switched
off.
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
The pump is not run-
ning.
The pump is not run-
ning.
The green indicator
light is flashing.
The pump has
stopped due to a fault.
The red indicator light
is on and the green in-
dicator light is off.
Noise in the system.
The green indicator
light is on.
Noise in the pump.
The green indicator
light is on.
Insufficient heat in
some places in the
heating system.
See also section 6.6 Indicator lights.
Note: The R100 can also be used for fault finding.
Cause
A fuse in the installation is blown.
Current/voltage-operated earth-leakage cir-
cuit breaker has tripped out.
Electricity supply failure (e.g. overvoltage or
undervoltage).
The pump is defective.
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
(expansion module).*
4. Via bus signal (bus module).*
* 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.
The pump has stopped because of too high
ambient or liquid temperature.
Pump blocked and/or impurities in the pump. Remove the air vent screw and turn
Air in the system.
The flow is too high.
The pressure is too high.
Air in the pump.
The inlet pressure is too low.
The pump flow is too low.
Remedy
Replace the fuse.
Cut in the circuit breaker.
Check that the electricity supply falls
within the specified range.
Replace the pump.
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.*
Check that the ambient and liquid
temperatures fall within the specified
ranges.
the rotor by means of a screwdriver
inserted into the slot in the shaft end,
and/or dismantle and clean the pump.
Vent the system.
Reduce the head (setpoint) and pos-
sibly change over to constant pres-
sure.
Reduce the head (setpoint) and pos-
sibly change over to proportional
pressure.
Vent the pump.
Increase the inlet pressure and/or
check air volume in the expansion
tank (if installed).
Increase the head (setpoint) and/or
change over to constant pressure.
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