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Page 65
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Operation
B800-00-880 Issue D
Power is reinstated after pump
rotational speed falls below 50% but
before regenerative power ceases
Either parallel or serial control
mode, timer disabled
Regenerative power maintains all
output signals during the power
failure. As the timer is disabled, the
controller will go into fail condition
as soon as speed falls below 50% and
will display flashing error code 0.
When the power is reinstated, the
pump will not ramp up until the
error is cleared. To clear the error,
send a stop command (either parallel
or serial, depending on the control
mode), then send a start command
to ramp the pump up to the
designated speed.
Either parallel or serial control
mode, timer enabled
Regenerative power maintains all
output signals during the power
failure. If power is reinstated before
the timer period expires, the pump
will ramp up to its designated speed
as quickly as possible. If the timer
period expires, the controller will go
into fail condition and will display
flashing error code 3. As above,
when the power is reinstated, the
pump will not ramp up until the
error is cleared. To clear the error,
send a stop command (either parallel
or serial, depending on the control
mode), then send a start command
to ramp the pump up to the
designated speed
Power is reinstated after pump
rotational speed falls below 50% and
the regenerative power ceases
Either parallel or serial control mode Regenerative power ceases and fails
to maintain output signals. When
power is reinstated, the pump with
parallel control will automatically
restart if the start control on the
logic interface is set to start. The
pump with serial control will require
a new start command to ramp the
pump up to the designated speed.
Any fail signals that were triggered
during the regenerative power
period are lost when the power is
reinstated.
Table 24 - Behaviour of a pump when the power is re-instated after an electrical supply failure (continued)
Length of power failure
Control mode
Behaviour of pump
