SJE
®
12
VFDC-3000 Controller User Manual
Low Pressure Alarm Condition
At any time during operation, if the system pressure drops below the Low Pressure Alarm level for the Low
Pressure Alarm Delay Time, all pump operation shall immediately stop, and a Low Pressure Alarm flag shall
be set. The Low Pressure Alarm condition shall remain until the Low Pressure Alarm Reset Delay Time has
expired. If the Low Pressure Alarm Reset Delay Time is set to “0 min”, the Low Pressure Alarm condition
must be manually reset by pressing and holding the ESC button for 2 seconds.
High Pressure Alarm Condition
At any time during operation, if the system pressure increases above the High Pressure Alarm level, all
pump operation shall immediately stop, and a High Pressure Alarm flag shall be set. When the system
pressure drops below the High Pressure Alarm level and a delay of 10 seconds has elapsed, the High
Pressure Alarm flag shall cease, and normal operation shall resume.
Low Suction Pressure Alarm Condition
At any time during operation, if the Low Suction Pressure input is active for the Low Suction Pressure Delay
Time, all pump operation shall immediately stop, and a Low Suction Pressure Alarm flag shall be set. When
the Low Suction Pressure input deactivates, the Low Suction Pressure Alarm flag shall cease, and normal
operation shall resume.
Low Water Alarm Condition
At any time during operation, if the Low Water Alarm input is active, all pump operation shall immediately
stop, and a Low Water Alarm flag shall be set. When the Low Water Alarm input deactivates, the Low Water
Alarm flag shall cease, and normal operation shall resume.
Pressure Sensor Open Circuit Alarm
At any time during operation, if the controller senses an open circuit on the pressure transmitter, all pump
operation shall immediately stop, and a Pressure Sensor Open Circuit Alarm flag shall be set. When the
controller senses a normal pressure transmitter signal, the Pressure Sensor Open Circuit Alarm flag shall
cease, and normal operation shall resume.
Pressure Sensor Short Circuit Alarm
At any time during operation, if the controller senses a short circuit on the pressure transmitter, all pump
operation shall immediately stop, and a Pressure Sensor Short Circuit Alarm flag shall be set. When the
controller senses a normal pressure transmitter signal, the Pressure Sensor Short Circuit Alarm flag shall
cease, and normal operation shall resume.
Pump 1-3 Fault Alarm
At any time during operation, if a fault is found on any of the VFDs, a Pump Fault Alarm flag is set for the
corresponding pump and the faulted VFD is removed from the alternation sequence and operation. If the
fault condition is repaired and the VFD is reset, the VFD is returned to the alternation sequence and normal
operation shall resume.
Pump 1-3 Comm Fail Alarm
At any time during operation, if a communication failure is found for any of the VFDs, a Pump Comm Fail
Alarm flag is set for the corresponding pump and the VFD is removed from the alternation sequence and
operation. If the communication is restored, the VFD is returned to the alternation sequence and normal
operation shall resume.
