Detailed Parameter Functions
BR-01 Base frequency
Base frequency is the frequency that the rated voltage of the inverter can output. Set according to
the rated frequency of the motor.
BR-02 Max. output frequency
Max. output frequency is the max. frequency that the inverter can operate. This value must not
exceed the frequency allowed by the motor.
BR-03 Min. output frequency
When the set pressure is reached and the demand for water stops, the pump will slow down to the
min. output frequency for a certain time and then will go to “sleep”. When this frequency is too high,
frequent ON/OFF cycling will occur. If this frequency is too low, the pump will not shut off and will
cause damage to the pump. During installation, please ensure the sleep function operates correctly
by opening and closing the valves several times and observing correct operation prior to leaving the
site. The default value is recommended for this setup.
BR-04 Rotating direction
When the wire connection of the motor is incorrect, the pump rotation is reversed. Reverse rotation
may cause lower pressure, stop water pumping and noise and vibration. If this occurs change the
setup for the rotating direction in lieu of changing the wire connection.
0: Forward rotation
1: Reverse rotation
BR-05 Auto Reset Time (OL)
0: Manual Reset
1-5: Auto Reset Time (mins.)
BR-06 Transducer offset
In case of a pressure deviation occurring in the system, or the pressure of the gauge is different from
the pressure displayed on the screen, this parameter can offset for this difference.
Before changing this parameter, ensure the pressure gauge is accurate.
BR-07 Restart after sleep pressure differential
After entering “sleep” mode the system will allow the pressure to drop this amount before starting the
pump. If this value is set too small, the pump may operate with frequent Start/Stop cycles. On the
other hand, if this value is set too high, the large pressure drop may be an inconvenient to the user.
BR-08 High pressure alarm
If the current pressure is higher than the high-pressure alarm, the high pressure alarm icon is shown
on screen and the pump stops immediately. If the current pressure drops lower than the high-
pressure alarm, the icon disappears and the pump operates normally again.
BR-09 Low pressure alarm
Note:
On initial start up, the low pressure fault will not be activated for 3 minutes to allow for the
piping system to fill.
If the pressure drops for more than 15 seconds below this point, the low pressure alarm is set. The
pump stops and the low pressure alarm icon will appear on the screen. After 15 seconds, the system
automatically restarts, If the pressure returns to normal operating range within 15 seconds, the sys-
tem will continue running. If not, the system will repeat this cycle. If the low pressure alarm remains
after the second time, the pump will stop for the time entered in BR-16 and then attempt to restart.
If the low pressure fault remains, the system will shut down and not restart. The system will need to
be reset by cycling the power and removing the source of the problem.
16
SJE-Rhombus
®
VARIOspeed
®
Micro Controller User Manual
