SJE VFDC-3000 Manual Del Usario página 12

• Low Suction Reset Delay Time
The Low Suction Reset Delay Time is used when the Low Suction Reset setting is in AUTO and should
be set to the amount of time after the low suction input deactivates until the system resumes normal
operation.
Idle Prevention
The Idle Prevention function shall run each pump at the "Minimum Frequency" for 30 seconds, if the VFD has
not run during the time set in the Idle Prevention Exercise Schedule setting.
• Idle Prevention Exercise Schedule
The Idle Prevention Exercise Schedule should be set to the maximum time a pump is allowed to set idle
before the pump is exercised by the controller. If the "Idle Prevention Exercise" setting is "0 days", then
the Idle Prevention function is disabled.
Jockey Pump Operation
The Jockey Pump Function, when enabled, will run VFD 1 as Lead, on every pump cycle. There is no
alternation of the Lead pump (VFD 1). Only VFD 2 and VFD 3 will alternate as Lag 1 and Lag 2. If Lag 1 VFD
is called to run, VFD 2 and VFD 3 will start and run based on automatic alternation as in the normal operation.
» The Jockey Pump will shut down the "Jockey Pump Stop Delay" after the start of Lag 1 VFD.
» The Jockey Pump will not run again until Lag 2 and Lag 3 VFDs are OFF and the system pressure
drops below the "Start Lead diff Pressure".
• Pump 1 Jockey
The Pump 1 Jockey setting should be set to ENABLED to allow pump 1 to function as a Jockey Pump or
set to DISABLED to not allow the Jockey Pump operation.
• Jockey Pump Stop Delay Time
The Jockey Pump Stop Delay Time setting is the time after the start of the lag 1 pump before the
Jockey Pump is shut down.
Number of Pumps
The Number of Pumps setting should be set to the number of pumps that the controller will operate.
Maximum Pumps On
The Maximum Pumps On setting is used to limit the number of pumps that can be running in automatic mode.
Relay 1 ~6 Function
The functions of Relay 1 ~6 are programmable.
The available functions are:
P1 Run, P2 Run, P3 Run, P1 Fault, P2 Fault, P3 Fault, High Press, Low Press, Low Suction, Low
Water, General Alarm.
These relays are normally open and are non-retentive during power loss.
VFD 1 ~3 Hand Speed
When the HAND/OFF/AUTO selector switch on the control panel is set to the HAND position, the VFD will run
the pump at a constant speed. The default frequency is 45 Hz.
Caution: Do not operate a pump in HAND mode for an extended time without close supervision. The pump
will not stop automatically on high pressure and will burst the pipes and cause damage.
Language
The Language setting selects the language displayed on the controller.
SJE ® 10 VFDC-3000 Controller User Manual