SJE Rhombus VARIOspeed LCD Manual De Inicio Rápido página 6

Parameter List
Deceleration Time (P. 45)
Set the Deceleration Time to the rate at which the output frequency will decelerate while the VFD is operating above the
Thrust Bearing Switch Frequency. This rate is based on the time the VFD would take to decelerate from 60 Hz to 0 Hz.
Default value: 5 sec
Set Pressure (P. 133)
The Set Pressure is the target pressure to be maintained at the pump discharge. The Set Pressure cannot exceed the
maximum range of the pressure transducer. Default value: 55 psi
Sleep Time (P. 575)
Set the Sleep Time to the amount of time that the VFD will wait before entering "Sleep" mode after the output frequency
drops below the Sleep Frequency. Note: If the system cycles on and off too frequently, try the following: increase the
Sleep Time, lower the Sleep Frequency, or increase the Start Pressure Differential. A combination of changes of all three
settings may be necessary. If the VFD does not enter "Sleep" mode when there is no flow of water in the system, the
Sleep Frequency must be increased. The Sleep Time is measured in seconds. Default value: 10 sec
Sleep Frequency (P. 576)
Set the Sleep Frequency to the frequency at which the pump no longer builds pressure when operating at or near
the Set Pressure. The VFD will enter the "sleep" mode when the output frequency of the VFD drops below the Sleep
Frequency for the Sleep Time. Default value: 35Hz
Notes:
If your pump Starts and Stops frequently, change the parameters below:

Increase the Sleep timer (P.575)

Lower the Sleep Frequency (P.576)

Increase the Start pressure differential (P.577)
If your pump does not go to sleep when there is no flow:

Increase the Sleep Frequency (P.576).
Start Pressure Differential (P. 577)
The Start Pressure Differential is the amount of pressure drop from the Set Pressure, at which the VFD will wake from
sleep and run to maintain the system pressure. The pump will start if the pressure drops below the Set Pressure less the
Start Pressure Differential. Example: If the Set Pressure is 40 PSI (P.133=40 PSI), and the Start Pressure Differential
is 5 PSI (P.577=1005), the pump will start when the pressure drops below 35 PSI. Default value: 1005 (5PSI).
6 VARIOspeed ® LCD Quick Start Manual