Grundfos LON Module Instrucciones De Montaje página 9

Fault Cause
The pump The pump has been stopped
does not run. in one of the following ways:
The green indi-
1. External on/off switch in
cator light is
position off.
flashing.
2. Via BUS signal.
The red indica-
tor light is on.
The following faults exist/
existed (have disappeared):
a) Wrong phase sequence.
b) The pump has been cut
out by the thermal over-
load switch.
c) The speed switch module
and the basic module are
not of the same type.
One is a three-phase
module and the other is a
single-phase module.
d) The speed switch module
has not been fitted.
e) Supply failure.
f) Missing phase.
g) Fault in electronics.
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Remedy
a) Switch off the electricity supply by
means of the external mains switch
and interchange two phases in the
terminal box.
b) Check that the liquid temperature
falls within the specified range. The
pump starts automatically after
cooling.
c) Replace one of the modules so that
it is suitable for the pump type (sin-
gle-phase or three-phase).
d) Switch off the electricity supply by
means of the external mains switch
and fit the speed switch module.
e) Check that the electricity supply
falls within the specified range.
f) Check fuses and connections.
g) Replace the modules in the termi-
nal box. Contact GRUNDFOS.
Subject to alterations.