| Symptom | Cause | Remedy |
| Display does not light up |
No Power
Wired incorrectly
Voltage is not correct |
Check circuit breaker
Check wiring per diagram
Ensure voltage is 230V |
| Pump will not reach HI or cut off pressure |
Pump can't build enough pressure
Loss of Prime
Pump is dead headed
Water being demanded |
Change HI setting within pump capabilities
Prime pump
Make sure isolation valve not shut to system
Find leak or open line |
| HI or LO setting will not set |
Differential pressure is out of acceptable range |
Differential pressure cannot be less than 10 psi or more than 50 psi |
| Pump rapid cycles |
Cycle Stop Valve not working or set correctly
Pressure tank too small or waterlogged
Pressure switch located on main line and not at base of pressure tank |
HI setting must be higher than CSV setting
Replace tank
Move switch to the small line at the base of the pressure tank and off of the main line. |
| Pump will not come on |
Loss of power
Not wired up correctly
Error E2 or E3 is displayed |
Check incoming power
Check wiring per pump manufacturer instructions
Determine cause of low or high pressure or voltage problems and correct |
| Flow drops off before pump starts up |
Too much air pressure in your pressure tank |
Adjust tank air pressure to 5 psi below LO set pressure |
