TROUBLESHOOTING
QUICK REFERENCE GUIDE
SUBDRIVE TROUBLESHOOTING
CONDITION
INDICATOR LIGHTS
POSSIBLE CAUSE
CORRECTIVE ACTION
NO WATER
NONE
- No supply voltage present
- Display board cable disconnected or loose
- Verify cable connection between main control board and display board
- If correct voltage is present, replace drive
GREEN
“---” ON DISPLAY
- Pressure sensor circuit
- Verify water pressure is below system set point
- If Pressure Input Board break-away tab is removed, ensure auxiliary device is connected and closed
circuit
- If Pressure Input Board break-away tab is removed and no auxiliary device is being used, manually
short-circuit “AUX IN” connections
- Jumper wires together at pressure sensor; if pump starts, replace sensor
- If pump doesn’t start, check sensor connection at Pressure Input Board; if loose, repair
- If pump doesn’t start, jumper sensor connection at Pressure Input Board. If pump starts, replace wire
- If pump doesn’t start with sensor Pressure Input Board connection jumpered, replace Pressure Input
Board
- If pump doesn’t start with new Pressure Input Board, replace drive
RED
FAULT CODE ON DISPLAY
- Fault detected
- Proceed to fault code description and remedy
GREEN
MOTOR FREQUENCY ON DISPLAY
- Drive and motor are operating
- Loose switch or cable connection
- Incorrect motor or pump settings
- Motor may be running backwards
- Gulping water at pump inlet
- Verify Maximum Frequency setting. If this setting was reduced below maximum value, increase
- Verify motor/pump ratings and match to motor/pump settings on drive (DIP switch or Wi-Fi)
- Verify motor connections
- Frequency max, amps low, check for closed valve, or stuck check valve
- Frequency max, amps high, check for hole in pipe
- Frequency max, amps erratic, check pump operation, dragging impellers
- This is not a drive problem
- Check all connections
- Disconnect power and allow well to recover for short time, then retry
PRESSURE
FLUCTUATIONS
(POOR REGULATION)
GREEN
MOTOR FREQUENCY ON DISPLAY
- Pressure sensor placement and setting
- Pressure gauge placement
- Pressure tank size and pre-charge
- Leak in system
- Air entrainment into pump intake
(lack of submergence)
- Correct pressure and placement as necessary
- Tank may be too small for system flow
- This is not a drive problem
- Disconnect power and check pressure gauge for pressure drop
- Set deeper in the well or tank; install a flow sleeve with airtight seal around drop pipe and cable
- If fluctuation is only on branches before sensor, enable Steady Flow
- Change tank size configuration
RUN ON
WON’T SHUT DOWN
GREEN
MOTOR FREQUENCY ON DISPLAY
- Pressure sensor placement and setting
- Tank pre-charge pressure
- Impeller damage
- Leaky system
- Sized improperly (pump can’t build enough head)
- Check frequency at low flows, pressure setting may be too close to pump max head
- Verify precharge at 70% if tank size is larger than minimum, increase precharge (up to 85%)
- Verify that the system will build and hold pressure
- Enable bump and/or aggressive bump
- Increase minimum frequency
RUNS BUT TRIPS
FLASHING RED
- Check fault code and see corrective action
- Proceed to fault code description and remedy on reverse side
EN
