Installation & Operation Manual
L932/B
Intelligent Pump Controller
Installation & Operation Manual Ver.1.1
.14.
3). Meaning of the messages & graphic shown on the LCD screen
Messages & Graphic
Description
Lack of water in water well
Full of water in water well
Lack of pressure in pipeline or pressure tank
Full of pressure in pipeline or pressure tank
L.P
H.P
L.P
H.P
5.3 Pump protection
During pump running, if dry run, over load, under voltage, etc failures happened, the L932/B will
immediately shut down the pump running and automatically execute a check for restarting conditions
after a built in time delay has elapsed. The L932/B will not recover automatically until all the abnormal
situation(s) have been cleared.
If pump stalled, open phase etc serious failures happened, pump user must check the pump and motor
immediately and repair the pump.
5.4 Pump last five failure record displaying
The L932/B can memorize the last five failures of pump, so it is very convenient for the pump users to
analyse the pump running conditions.
1). Normal pressure demanding
If pressure value in the pipeline is 6bar, controller will order single pump to run, when pressure value
reaches 10bar, single pump stops running; controller will alternate dual pumps running automatically
when pressure value varies from 6bar to 10bar;
2). Extra pressure demanding
single pump is running, pressure value in the pipeline still decrease to 3bar, controller will order another
pump to run simultaneously, till the pressure in the pipeline reaches 10bar, double pump will not stop
running;
