Franklin Electric CERUS X-DRIVE CXD-003A-4V, Installation And Operation Manual

Page: 95 / 252

OPERATION
Protection Features
95
When
No Flow Mode [IO–38]
is set to
2_Sleep
, the flow switch will become an additional condition for sleep
mode. When VFD runs with PID control and determines that all sleep mode conditions are met and the flow
switch is open during Sleep delay, VFD will go into sleep mode.
Broken Pipe Protection (for Pump Applications)
The VFD has the ability to detect a broken pipe in the system. The VFD must be running with PID Control in
Auto mode for this feature to be active.
To enable this feature, adjust the following parameters:
Broken Pipe Level [SET–36]: 0.0 to
PID F/B Max [SET–20]
. Setting of 0.0 disables the feature. When pressure
falls below this level and VFD continues to run above Broken Pipe Freq [SET–37] , Broken Pipe Delay [SET-38] starts.
Broken Pipe Freq [SET–37]:
PID Low Hz Limit [SET–22]
to
PID Hi Hz Limit [SET–23]
.
Broken Pipe Delay [SET–38]: The timer provide a delay for triggering a Broken Pipe fault.
NOTE: Manual or remote reset is required.
Stall Prevention
This feature protects the motor and equipment from over-torque damage. Set a desired stall level in param -
eters
OCA Level [PROT-07]
(at acceleration) and
OCN Level [PROT-08]
(at steady speed).
When motor current reaches Stall level either during acceleration or at steady speed, VFD will decrease out -
put frequency to maintain motor current below Stall level.