Yaskawa iQpump Manual Supplement - Manual (Page 18)

7 Suction Control via Constant Pressure w/Well Draw Down
18 YASKAWA TM.iQp.10 iQpump Technical Manual Supplement
P8-13 Suction Pressure Sleep Wake-Up Time
P8-14 Low Suction Pressure Detection Time Unit
Defines the time unit for P8-08.
Suction Pressure Transducer Wire-break Detection
Wire-break detection is active on Terminal A1 when PI Feedback Loss Detection is enabled (b5-12 = 1 or 2) , Suction
control is enabled (P8-01 = 2) and PI control is NOT disabled via Multi-Function Digital Input.
The iQpump Controller detects a wire-break condition when the suction transducer signal on Terminal A1 falls below -
6.25 % or rises above 106.25 % for more than 1 second and will react according to parameter b5-12 (Feedback Loss
Detection).
Note: Wire-break detection on Terminal A1 detection is checked after the gain/bias parameters (H3-02 and H3-03) are applied.
Fault: Low Suction
Parameters P8-12 to P8-14 are also available for Water Level control P8-01 set to 1. The parameter titles change
accordingly.
P8-12 Water Level Auto-Restart Time
P8-13 Water Level Sleep Wake-Up Time
P8-14 Low Water Detection Time Unit
Multi-function Output Setting H2-††: Low Suction (Modified)
Range Description Default
0 - 3600 sec
If the iQpump Controller has been forced to sleep based upon the minimum
suction pressure (P8-04), the pressure must go above the P8-05 level for more
than this time in order to wake up. 1 sec
Setting Description
0 Minutes (factory default)
1 Seconds
Fault Display Description
LOSUC
Low Suction
Low Suction: Suction pressure is below the P8-07 level for more than the P8-08 time.
Range Description Default
0.1 - 6000.0 min
Sets the amount of time the iQpump Controller will wait before attempting an
auto-restart of the "Low Water" fault. Effective only when P8-09 = 3 and
L5-01 > 0. 5.0 min
Range Description Default
0 - 3600 sec
If the iQpump Controller is forced to sleep based upon the minimum water
level (P8-04), the pressure must go above the P8-05 level for more than this
time in order to wake up.
1 sec
Setting Description
0 Minutes (factory default)
1 Seconds
Setting Description
57 Low Water
This output will energize if P8-01 = 1 and the level in the well drops below the Low Level Detection Level
(P8-07) for more than the Low Level Detection Delay Time (P8-08), or if there is a LOWWL - Low Water
Level Fault.