216 GX9 ASD Installation and Operation Manual
Virtual Linear Pump Low Suction/No-Flow Cut Off Fault
Action
Program Virtual Linear Pump Low Suction/No-Flow Cut Off
This parameter is used in conjunction with the setting of parameter F936.
If On (Physical Switch) or On (Electronic Switch) is selected at parameter
F936, then this parameter selection sets the disposition of the system in the
event of a Low Suction/No-Flow Cut Off condition that exists for the duration
of the parameter F936 setting.
If Off is selected at parameter F936, then this parameter selection is ignored.
Settings:
0 — Trip
1 — Alarm
Direct Access Number — F935
Parameter Type — Selection List
Factory Default — Trip
Changeable During Run — Yes
Virtual Linear Pump Low Suction/No-Flow Cut Off Delay
Timer
Virtual Linear Pump Low Suction/No Flow Cut Off
This parameter has three functions.
1. It is used to set the time that the ASD will be allowed to run at the Upper-
Limit Frequency continuously before the system is turned off.
This condition is used as an indication of loss of feed water or a closed
output valve.
2. It is used to set the time that a Low Suction/No Flow condition is allowed
to continue before a shut down.
3. It is used to set the time that must lapse before a system restart is attempted
after a system shut down due to a Low Suction/No Flow condition. See
F935 for more information on this function.
Direct Access Number — F936
Parameter Type — Numerical
Factory Default — 10
Changeable During Run — Yes
Minimum — 1
Maximum — 255
Units — Seconds
Virtual Linear Pump Sealing Water Mode
Virtual Linear Pump Sealing Water
This parameter Enables/Disables seal water detection.
On larger or older pumps external sealing water is required at start up. Until
adequately supplied with sealing water the ASD will not start.
An external sealing water pump is required to supply sealing water and is
enabled via an ASD output contactor set to Sealing Water.
Normal ASD operations are allowed once an adequate water supply is detected
at the seal, as detected by a pump-mounted reed switch that is connected to a
discrete input terminal of the ASD.
Set the discrete input terminal to Sealing Water.
Settings:
0 — Off
1 — On
Direct Access Number — F937
Parameter Type — Selection List
Factory Default — Off
Changeable During Run — Yes
F935 F937
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