Troubleshooting

Diagnosis: A Franklin Electric SubDrive ‘2 Flashes’ error code signifies a critical output fault due to a short circuit. This is most often caused by a failed waterproof cable splice or abrasion of the submersible cable against the well casing, leading to a phase-to-phase or phase-to-ground short. A professional repair involves pulling the pump and […]

Diagnosis: A Pentair Intellidrive E-05 Over Voltage fault indicates the drive’s internal DC bus voltage has exceeded safe limits, typically due to a power surge from the utility grid. A simple power cycle may resolve the error, but if the main board is damaged or the motor windings are shorted, a professional diagnosis with a

Diagnosis: A Franklin Electric SubDrive or MonoDrive displaying a 3-flash error code indicates a ‘Bound Pump’ or ‘Overload’ fault. This is typically caused by a mechanical seizure of the pump or motor downhole due to sand/sediment intrusion, bearing failure, or a burned motor winding. Professional diagnosis and pulling the pump from the well are required

Diagnosis: The Pentair Intellidrive E-07 error code indicates a ‘Dry Run’ or underload condition, where the pump is pumping air instead of water. This is a protective shutdown to prevent catastrophic pump damage. The primary causes are a drop in the well’s water level, a major leak in the system, or incorrectly calibrated Underload protection

Diagnosis: A Franklin Electric SubDrive or MonoDrive flashing 4 times indicates an overheated controller, not the motor. This is often caused by direct sun exposure, poor ventilation, or a blocked heat sink. Immediate fixes include providing shade and cleaning the unit, but it can also signal a deeper issue like a failing pump motor that

Diagnosis: A single red flash on your Amtrol Guardian CP control indicates the ‘Rapid Cycling Guard’ is active, meaning the well pump is turning on and off too frequently. This is most often caused by a ruptured internal bladder in the pressure tank, resulting in a waterlogged tank. The primary fix involves confirming the tank

Diagnosis: A Franklin SubDrive controller flashing 5 times signifies a critical undervoltage fault, where the incoming line voltage has fallen below the drive’s minimum operating threshold (typically around 195V for a 230V system). This protective shutdown prevents catastrophic motor damage and is commonly caused by utility grid sags, a failing circuit breaker, or undersized supply

Diagnosis: A 6-flash error on a Franklin Electric SubDrive or MonoDrive signals a critical overvoltage condition, often from lightning strikes or utility grid instability. This fault protects the VFD and motor from damage by shutting down when line voltage exceeds safe limits. Troubleshooting involves verifying input voltage, inspecting for surge damage, and potentially replacing the

Diagnosis: A Grundfos CU 301 Dry Running alarm (Red Indicator #1) signifies the well water level has dropped below the SQE pump’s intake, causing a protective shutdown. This advanced feature prevents motor burnout by detecting the low-amperage condition of pumping air instead of water. The primary solution involves allowing the well to recover, but persistent

Diagnosis: A Grundfos CU 301 ‘Overvoltage’ fault indicates the incoming power supply has exceeded the 280V safety limit, triggering a protective shutdown of the SQE pump. This is most often caused by utility grid issues, such as a failing neutral conductor, or incorrect transformer tapping. Immediate diagnosis is critical to prevent permanent damage to the