Franklin AIM Manual

AIM Manual

Electronic Maintenance » Electronic Controls (Page 65)

SubDrive/MonoDrive Troubleshooting (Continued)

SubDrive15, 20, 30, MonoDrive, and MonoDriveXT (NEMA 3R)

Diagnostic Fault Codes
F1MOTOR UNDERLOAD- Overpumped well
- Broken shaft or coupling
- Blocked screen, worn pump
- Air/gas locked pump
- SubDrive not set properly for pump end
- Underload Sensitivity setting incorrect
- Frequency near maximum with load less than configured underload sensitivity (Potentiometer or Wi-Fi)
- System is drawing down to pump inlet (out of water)
- High static, light loading pump
- reset Potentiometer for less sensitivity if not out of water
- Check pump rotation (SubDrive only) reconnect if necessary for proper rotation
- Air/gas locked pump - if possible, set deeper in well to reduce
- Verify DIP switches are set properly - Check Underload Sensitivity Setting (Potentiometer or Wi-Fi setting, whichever is applicable)
F2UNDERVOLTAGE- Low line voltage
- Misconnected input leads
- Loose connection at breaker or panel
- Line voltage low, less than approximately 150 VAC (normal operating range = 190 to 260 VAC)
- Check incoming power connections and correct or tighten if necessary - Correct incoming voltage
- check circuit breaker or fuses, contact power company
F3OVERCURRENT / LOCKED PUMP- Motor and/or pump misalignment
- Dragging motor and/or pump
- Motor and/or pump locked
- Abrasives in pump
- Excess motor cable length
- Amperage above SFL at 30 Hz
- Remove and repair or replace as required
- Reduce motor cable length. Adhere to Maximum Motor Cable Length table.
(MonoDrive &
MonoDriveXT only)
- Wrong resistance values on main and start
- Wrong resistance on DC test at start
- Check wiring, check motor size and DIP switch setting, adjust or repair as needed
F5OPEN PHASE- Loose connection
- Defective motor or drop cable - Wrong motor
- Open reading on DC test at start.
- Check drop cable and motor resistance, tighten output connections, repair or replace as necessary, use “dry” motor to Check drive functions. If drive will not run and exhibits underload fault replace drive
F6SHORT CIRCUIT- When fault is indicated immediately after power-up, short circuit due to loose connection, defective cable, splice or motor- Amperage exceeded 25 amps on DC test at start or SF amps during running
- Incorrect output wiring, phase to phase short, phase to ground short in wiring or motor
- If fault is present after resetting and removing motor leads, replace drive
F7OVERHEATED DRIVE- High ambient temperature
- Direct sunlight
- Obstruction of airflow
- Drive heat sink has exceeded max rated temperature, needs to drop below 194 °F (90 °C) to restart
- Fan blocked or inoperable, ambient above 122 °F (50 °C), direct sunlight, air flow blocked
- Replace fan or relocate drive as necessary
- Remove debris from fan intake/exhaust
- Remove and clean optional air screen kit (if installed)
F9INTERNAL PCB FAULT- A fault was found internal to drive- Contact your Franklin Electric Service Personnel
- Unit may require replacement. Contact your supplier.
F12OVERVOLTAGE- High line voltage
- internal voltage too High
- Line voltage high
- Check incoming power connections and correct or tighten if necessary
- If line voltage is stable and measured below 260 VAC and problem persists, contact your Franklin Electric Service Personnel
  • Power down, disconnect leads to the motor and power up the SubDrive:
  • - If the SubDrive does not give an “open phase” fault (F5), then there is a problem with the SubDrive.
  • - Connect the SubDrive to a dry motor. If the motor goes through DC test and gives “underload” fault (F1), the SubDrive is working properly.