PROBLEMS WITH A SD 75, 100, 150 OR 300
|FAULT||POSSIBLE CAUSE||CORRECTIVE ACTION|
Broken Shaft or Coupling
Blocked Screen, Worn Pump
Air/Gas Locked Pump
SubDrive not set properly for pump end.
near maximum with less than 65%
of expected load, 42% if DIP #3 is on.
System is drawing down to pump inlet
Out of Water
High Static. light loading pump - reset DIP #3
to "on" 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 the well to reduce.
Verify DIP switches are set properly.
Misconnected input leads
voltage low, less than approximately 150 VAC
(normal operating range is 190 - 260 VAC)
Check incoming power connections and correct
or tighten if necessary
Correct incoming voltage - check circuit breaker
or fuses, contact power company
and/or pump misallignment
Dragging motor and/or pump
Abrasives in pump
above SFL at 10 Hz
Remove and repair or replace as required
Wrong resistance values on main and start
resistance on DC test at start
Check wiring, check motor size and DIP switch
setting, adjust or repair as needed
Defective motor or drop cable
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
Damaged pump or motor
exceeded 50 amps on DC teat 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
Obstruction of airflow
heat sink has exceeded max rated
temperature, needs to drop below 85 degrees C
Fan blocked or inoperable, ambient above 125
degrees F, direct sunlight, air flow blocked
Repair, relocate as necessary, NEMA 1 or 3R
fan failure - replace drive
Power down, disconnect
leads to the motor and power up the SubDrive.
|NO WATER||NONE||No supply voltage present||If correct voltage is present, replace drive|
|SOLID GREEN||Pressure sensor circuit||Verify water
pressure is below system set point.
Jumper wires together at pressure sensor, if
pump starts, replace sensor.
If pump doesn't start, check sensor connection
at PCB, if loose, repair.
If pump doesn't start, jumper sensor connection
at PCB, if pump starts, replace wire.
If pump doesn't start with sensor PCB connection
jumped, replace drive.
SOLID RED AND GREEN
|Power Surge, bad component||Power
system down to clear fault, verify voltage,
if repetitive, replace drive.
|FLASHING RED||Fault detected||Proceed to fault code description and remedy.|
and motor are operating
Loose switch or cable connection
Gulping water at pump inlet.
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 and allow well to recover for
a short time, then retry.
sensor replacement and setting
Pressure gauge replacement
Pressure tank size and precharge
Leak in system
Air entrainment into pump intake
(lack of submergence)
pressure and placement as necessary.
Tank may be too small for system flow.
This is not a drive problem.
Disconnect power and check pressure gauge for
Set deeper in the well or tank; install a flow sleeve
with airtight seal around drop pipe and cable.
If fluctuation is only on branches before sensor,
flip DIP switch #4 to "on" (07C and newer).
WON'T SHUT OFF
sensor placement and setting
Tank precharge pressure
Sized improperly (pump can't build enough head)
frequency at low flows, pressure setting
may be to 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.
|RUNS BUT TRIPS||FLASHING RED||Check fault code and see corrective action||Proceed to fault code description and remedy.|
|LOW PRESSURE||FLASHING GREEN||Pressure
sensor setting, pump rotation,
pressure sensor, check pump rotation.
Check frequency at max flow, check maximum pressure.
|HIGH PRESSURE||FLASHING GREEN||Pressure
Shorted sensor wire
Remove sensor wire at PCB, if drive continues
to run, replace drive.
Verify condition of sensor wire and repair or
replace if necessary.
|AUDIBLE NOISE||FLASHING GREEN||Fan, hydraulic, plumbing||For
excessive fan noise, drive must be replaces on
NEMA 1 and 3R, fan is replaceable on NEMA 4.
If fan noise is normal, drive will need to be relocated
to a more remote area.
If hydraulic, try raising or lowering depth of pump.
Pressure tank location should be at entrance
of water line into house.
cable detached from LED printed
|Reattach cable - if cable is attached, replace drive.|
|FLASHING GREEN||See interference troubleshooting procedure.|
Constant Pressure Pump Systems