Low pressure in 170 ft deep well through submersible pump
I have installed submersible pump 170 ft deep well for my bilding to store water in the overhead Tank (40 ft) . It was working well for the last 4 years . Now it works well i.e with desired pressure if the voltage is above 250 volts and it takes 7 amp current . However, if the voltage is below 230 volts , the pump keeps running but the water is not pumped up (the current when no water becomes 5 Amp) . I have tried to change the capacitor(36 UF 440 volts) but no effect . Is there any problem in the control panel or the pump .
Thanks
TK, I kicked this up to you in hopes you could had more information the we did. Can you help this OP? Speedball1