Franklin Electric Fhoton 2 Installation Manual Download

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Open Phase (Open Circuit)

The Fhoton™ Drive monitors each phase current to the motor. If one of the phases is near zero amps for a duration of 1 second, the
Fhoton™ drive will halt the motor. The red LED will begin a 5 flash sequence and continue this flash sequence for a duration of 3 cycles.
After which time, the drive will resume normal operation.

Over Current (Short Circuit)

The Fhoton™ Drive monitors each phase current to the motor. If one of the phases shows an instantaneous burst of excessive current, the
Fhoton™ drive will halt the motor. The red LED will begin a 6 flash sequence and continue this flash sequence for a duration of 3 cycles.
After which time, the drive will resume normal operation.

Over Temperature Shutdown

The Fhoton™ Drive is designed for full power operation from a DC solar array. Under extreme thermal conditions, the drive will shut down
to avoid overheating. The red LED will begin a 7 flash sequence and continue this flash sequence for a minimum of 10 minutes. The drive
will restart, and full pump output will be restored when the drive temperature reaches a safe level.

Internal Error

The Fhoton™ Drive continuously monitors itself for potential, internal failures. If a failure condition is detected, the Fhoton™ drive will halt
the motor. The red LED will begin a 9 flash sequence and continue this flash sequence until power is cycled.

Flow Switch

A flow switch is available with the Fhoton™ Drive package to detect low flow or no flow conditions and prevent damage to the pump,
motor, and plumbing. At times of limited sunlight, a point will be reached where there is not enough solar power available to provide
adequate flow. The pump will reach a deadhead condition meaning the pump is spinning, but no water is moving. Continuous operation
in a deadhead condition, may overheat the pump, motor, and subsequently the plumbing, since no moving water carries away the heat.
This flow switch overrides the “RUN” command from any other control switches.

The flow switch detects adequate flow, permitting continuous operation; or detects zero or low flow, enabling a “deadhead” operation
mode which alternates a run-time interval and a cool-down interval, to avoid overheating the motor and pump. This feature is intended
to protect the pumping system from heat build-up which may lead to premature failure. If the flow does not meet the minimum value
to close the switch for a duration of 30 seconds (run-time interval), the Fhoton™ drive will halt the motor. The red LED will begin a 4 flash
sequence and continue this flash sequence for a duration of 5 minutes (cool-down interval). After which time, the drive will resume
normal operation. The controller will operate indefinitely in “deadhead mode”, until available power either increases sufficiently to move
adequate water or it decreases sufficiently that the controller is no longer able to spin the motor.

If the system is not capable of filling the plumbing within the run-time interval, the user may place a 'jumper wire' across the flow
switch terminals. This will allow the system to run indefinitely preventing the possibility of a low flow fault from occurring. It is highly
recommended that this configuration not be made permanent as this defeats the built-in protection provided by the Fhoton™ Drive, thus
preventing adequate protection against "deadhead".