AIM Manual
Electronic Maintenance » Electronic Controls (Page 67)
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SubDrive/MonoDrive Troubleshooting (Continued)
SubDrive2W, 75, 100, 150, 300, MonoDrive, and MonoDrive XT
Troubleshooting
| Condition | Indicator Light | POSSIBLE CAUSE | CORRECTIVE ACTION |
| NO WATER | NONE | - No supply voltage present | - If correct voltage is present, replace drive |
| SOLID GREEN | - Pressure sensor circuit | - Verify water pressure is below system set point - Jumper wires together at pressure sensor, if pump starts, replace sensor - If pump doesn’t start, check sensor connection at printed circuit board (PCB), if loose, repair - If pump doesn’t start, jumper sensor connection at PCB, if pump starts, replace wire - If pump doesn’t start with sensor PCB connection jumpered, replace drive | |
| SOLID RED OR SOLID RED AND GREEN | - Power surge, bad component | - Power system down to clear fault, verify voltage, if repetitive, replace drive | |
| FLASHING RED | - Fault detected | - Proceed to fault code description and remedy | |
| FLASHING GREEN | - Drive and motor are operating - Loose switch or cable connection - Gulping water at pump inlet | - 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) | FLASHING GREEN | - 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, flip DIP switch #4 to “on” (07C and newer) |
| RUN ON | FLASHING GREEN | - Pressure sensor placement and setting | - Check frequency at low flows, pressure setting may be too close to pump max head |
| WON’T SHUT DOWN | - Tank pre-charge pressure - Impeller damage - Leaky system - Sized improperly (pump can’t build enough 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 | |
| RUNS BUT TRIPS | FLASHING RED | - Check fault code and see corrective action | - Proceed to fault code description and remedy on reverse side |
| LOW PRESSURE | FLASHING GREEN | - Pressure sensor setting, pump rotation, pump sizing | - Adjust pressure sensor, check pump rotation - Check frequency at max flow, check max pressure |
| HIGH PRESSURE | FLASHING GREEN | - Pressure sensor setting - Shorted sensor wire | - Adjust pressure sensor - Remove sensor wire at PCB, if drive continues to run, replace drive - Verify condition of sensor wire and repair or replace if necessary |
| AUDIBLE NOISE | FLASHING GREEN | - Fan, hydraulic, plumbing | - For excessive fan noise, replace fan - If fan noise is normal, drive will need to be relocated to a more remote area - If hydraulic, try raising or lowering depth of pump - Pressure tank location should be at entrance of water line into house |
| NO LIGHTS | NONE | - Ribbon cable detached from LED printed circuit board | - Reattach cable - if cable is attached, replace drive |
| RFI-EMI INTERFERENCE | FLASHING GREEN | - See interference troubleshooting procedure |
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