Franklin 2007 SubDrive75, 150, 300, MonoDrive, & MonoDrive XT, SubDrive/MonoDrive Troubleshooting

Maintenance – Electronic Products

SubDrive75, 150, 300, MonoDrive, & MonoDrive XT

The Franklin Electric SubDrive/MonoDrive Constant Pressure controller is a variable-speed drive that delivers water at a constant pressure.

WARNING: Serious or fatal electrical shock may result from failure to connect the motor, SubDrive/MonoDrive Controller, metal plumbing and all other metal near the motor or cable to the power supply ground terminal using wire no smaller than motor cable wires. To reduce the risk of electrical shock, disconnect power before working on or around the water system. Capacitors inside the SubDrive/MonoDrive Controller can still hold a lethal voltage even after power has been removed. Allow 10 minutes for dangerous internal voltage to discharge. Do not use motor in swimming areas.

SubDrive/MonoDrive Troubleshooting

Should an application or system problem occur, a built-in diagnostics will protect the system. The “FAULT” light on the front of the SubDrive/MonoDrive Controller will fl ash a given number of times indicating the nature of the fault. In some cases, the system will shut itself off until corrective action is taken. Fault codes and their corrective actions are listed below. See SubDrive Installation Manual for installation data.

#OF

FLASHES

FAULT

POSSIBLE

CAUSE

CORRECTIVE ACTION

		Air-locked pump.	Wait for well to recover and automatic restart timer to time
		Overpumped or dry well.
1			out. If the problem does not correct, check motor and pump.
	Motor Underload	Worn pump.
			See description on “smart reset” at the end of the
		Damaged shaft or coupling.
			installation manual.
		Blocked pump or screen.
2		Low line voltage.	Check for loose connections. Check line voltage. Report low
	Undervoltage		voltage to the power company. Unit will start automatically
		Misconnected input leads.
			when proper power is supplied.
3		Motor/pump misaligned.	Unit will attempt to free a locked pump. If unsuccessful, check
	Locked Pump	Abrasive/sand bound pump.
			the motor and pump.
		Dragging pump or motor.
4	Incorrectly Wired	Start winding resistance too low.	Check if main and start wires are swapped. Make certain
			proper motor is installed.
(MonoDrive Only)
5		Loose connections.	Check motor wiring. Make certain all connections are tight.
	Open Circuit		Make certain proper motor is installed.
		Defective motor or cable.
			*Cycle input power to reset.
		When fault is indicated immediately
	Short Circuit	after power-up, short circuit due to loose	Check motor wiring. *Cycle input power to reset.
6		connection, defective cable, splice or motor.
		When fault is indicated while motor is
	Over Current	running, over current due to loose debris	Check pump.
		trapped in pump.
7	Overheated	High ambient temperature.	This fault automatically resets when temperature returns to
		Direct sunlight.
	Controller		a safe level.
		Obstruction of air fl ow.

* “Cycle input power” means turn the power off until both lights fade off and apply power again

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