Fault Finding Chart - Grundfos Magna Installation And Operating Instructions Manual

7. Fault finding chart

Before starting any work on the module, make sure that the elec-
tricity supply to the pump and the module has been switched off
and that it cannot be accidentally switched on.
Fault
The pump does not
react to external
start/stop.
The pump does not
send the correct
signal from the sig-
nal relay.
Cause
The wires are not con-
nected correctly to the
terminal block.
The pump was stopped
on the control panel or
with the R100.
Relay module not
mounted correctly.
Relay module defective.
Control box defective.
The wires are not con-
nected correctly to the
terminal block.
Signal relay not config-
ured correctly.
Relay module not
mounted correctly.
Relay module defective.
Control box defective.
Pumpland.ru
Remedy
Connect the wires cor-
rectly.
Set the pump back to nor-
mal duty.
Mount the relay module
correctly.
Replace the relay mod-
ule.
Replace the control box.
Connect the wires cor-
rectly.
Configure the signal relay
correctly.
The R100 can be used.
Mount the relay module
correctly.
Replace the relay mod-
ule.
Replace the control box.
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