Edwards nEXT200200 - Fault Finding and Diagnostics

Length of power failure Control mode Behaviour of pump
Power is restored aer the
r
otaonal speed of the pump
decreases below 50% but before
regenerave power stops
Parallel or serial control mode,
mer disabled
Regenerave power keeps all
output signals acve during the
power failure. As the mer is
disabled, the controller will go
into fail condion when the
speed decreases below 50% and
will display ashing error code 0.
When the power is restored, the
pump will not speed up unl the
error is cleared. To clear the
error, send a stop command
(parallel or serial, depend on the
control mode), send a start
command to speed up the pump
to the designated speed.
Parallel or serial control mode,
mer enabled
Regenerave power keeps all
output signals acve during the
power failure. If power is
restored before the mer period
expires, the pump will speed up
to designated speed. If the mer
period expires, the controller will
go into fail condion and will
display ashing error code 3. As
above, when the power is
restored, the pump will not
speed up unl the error is
cleared. To clear the error, send a
stop command (parallel or serial,
depend on the control mode),
send a start command to speed
up the pump to the designated
speed.
Power is restored aer the
r
otaonal speed of the pump
decreases below 50% and the
regenerave power stops
Parallel or serial control mode
Regenerave po
wer stops and
fails to keep output signals.
When power is restored, the
pump with parallel control will
automacally restart if the start
control on the logic interface is
set to start. The pump with serial
control requires a new start
command to speed up the pump
to the designated speed. The fail
signals caused during the
regenerave power period are
lost when the power is restored.
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B85200880_D - Oper
aon