SR981S/SR982S operation manual of solar pump stationPage 62 of 85►Press “ ” button, “PUMP2 HE A” shows on the screen, then pump output is highefficiency mode (RPM controlled)►Press “ESC” button to exit the menu or wait for 20 seconds to exit, parameters aresaved automatically.Note: when pump mode is set as “PUMP2 HE A”, pump speed is changed with scope20%~ 100%.Note: when pump mode is set as” PUMP2 ONOF”, pump is running with fixed speed, RPMcontrol is deactivated.8.5.4.1 n2MN Pump 2 speed adjustment (RPM)Output mode of R2 can be set as RPM output or as simple on/off mode, only you set theoutput mode as RPM mode, then you can see this submenu, and when you set “nMIN”value of 100%, then this output becomes “on/off “ control mode.Normal ONOF switch output: circuit pump speed control (RPM) is deactivated, pump isoperated with a fixed speed, and flow rate is not changed.HE A control output: (speed control is activated), the control system attempts to maintaina constant temperature difference between collector and tank, and as a result the pumpperformance is continuously adjusted; the flow rate of pump is increased or reduced basedon the temperature differenceSetup steps:To access main menu FUN, select submenu “n2MN”,“n2MN 100” shows on the screen.►Press “SET” button, parameter “100” blinks on thescreen.►Press “ ” button, to adjust pump speed. adjustable range: (30～100%),factory set is 100%.►Press “ESC” button to exit the menu or wait for 20 seconds to exit, parameters aresaved automatically.
