Franklin Electric SUBDRIVE CONNECT PLUS Manuel Du Propriétaire page 45

Symptom Based Troubleshooting
Display
Condition
None
Home
Screen
at 0 Hz
No water Fault Code •
Motor
Frequency
Pressure
Fluctuations Motor
(Poor Frequency
Regulation)
Run On
Motor
(pump won't
Frequency
stop)
Runs But
None
Trips
Motor
Low
Frequency
Pressure
Possible Cause
• No supply voltage present
• Control Board cable discon-
nected or loose
• Pressure sensor circuit
Fault detected
• Drive and motor are
operating, but the max fre-
quency was set too low to lift/
pump/produce water
• Loose switch or cable
connection
• Incorrect motor or pump
settings
• Motor may be running
backwards
• Gulping water at pump inlet
• Pressure sensor placement and
setting
• Pressure gauge placement
• Pressure tank size and
pre-charge
• Leak in system
• Air in pump intake (lack of
submergence)
• System response setting
• Pressure sensor placement and
setting
• Tank pre-charge pressure
• Impeller damage
• Leaky system
• Sized improperly (pump can't
build enough head)
• Check fault code and see cor-
rective action
• Pressure sensor setting, pump
rotation, pump sizing
• High temperature
Corrective Action
• Verify cable connection between Power Board and Control
Board
• If correct voltage is present, replace drive
• Verify water pressure is below system set point
• Ensure auxiliary device is connected and closed circuit
• Jumper wires together at pressure sensor; if pump starts, re-
place sensor
• If pump doesn't start, check sensor connection at J14; if
loose, repair
• If pump doesn't start, jumper sensor connection at J14. If
pump starts, replace wire
• If pump doesn't start with new sensor, replace drive
• Refer to "Diagnostic Fault Codes" on page 41
• Verify Maximum Frequency setting.
• Verify motor/pump ratings and match to motor/pump
settings on drive
• Verify motor connections
• 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, allow well to recover and retry
• Correct pressure sensor placement and settings
• Tank may be too small for system flow
• This is not a drive problem
• Disconnect power and check pressure gauge for drop
• Set deeper in the well or tank; install a flow sleeve with air-
tight seal around drop pipe and cable
• Change tank size configuration
• Reduce frequency output range
• Adjust System Response value
• Check frequency at low flows, pressure setting may be too
close to pump max 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
• Enable bump and/or aggressive bump
• Increase minimum frequency
• Proceed to fault code description and remedy
• Adjust pressure sensor
• Check frequency at max flow, check max pressure
• High ambient and/or drive temperature will cause drive to
foldback power and run with reduced performance
MAINTENANCE
Troubleshooting
45