13
NA0702P01 REV A
12/03/2019
10
Communication
The E/One PLC Quadplex Panel can be read by an external device to provide system operating parameters for system
monitoring and predictive maintenance.
10.1
USB Interface
All PLCs can be connected to a laptop or desktop computer in order to read all system variables and configuration data.
Using the free software, Somachine Basic v1.6 from Schneider Electric, the user can read in all data (even that which is
not visible via the Touch Screen Interface) and troubleshoot in more depth.
11
Trouble Shooting
The following chart is meant to address some common panel related issues. For more detailed information or pump
specific troubleshooting, please refer to the appropriate Service Manual or contact E/One service personnel.
11.1
Troubleshooting Chart
Fault
Symptom
Possible Cause
Test
Brownout
Voltage being
measured by PLC is
too low
Low incoming voltage
•
This testing may need to be done by qualified personal
•
Check voltage at panel per manual
Blown fuse or circuit
breaker
•
Verify all fuses or breakers feeding the panel are on (closed)
Malfunctioning voltage
transducer
•
Verify that the voltage transducer is functioning properly
Excessive heat in panel
•
Verify outside air temperature is below 120 F to ensure proper analog
input operation
Overvoltage
Voltage being
measured by PLC is
too high
High incoming voltage
•
This testing may need to be done by qualified personal
•
Check voltage at panel per manual
Malfunctioning voltage
transducer
•
Verify that the voltage transducer is functioning properly
Excessive heat in panel
•
Verify outside air temperature is below 120 F to ensure proper analog
input operation
Overpressure
Excessive pump
pressure
Discharge valve closed,
check valve malfunction,
line restriction, grinder
restriction, bad motor
•
Remove pump from discharge and retest with no discharge (pump
back into station)
If problem is still present then refer to Service Manual for more testing
Run Limit
Pump running longer
then set time
Tank size too large, stator
worn, high in-flow
•
Check amperage
•
Change Excessive Run Time Limit
No pump via
pressure
transducer
Pump will not run on
own but will run in
manual run
Pressure Transducer not
working, Tank ventilation
blocked trouble condition
present.
•
Perform continuity test per Service Manual to determine if the
Transducer is faulty
•
Verify that the tank ventilation is clear
Panel will not
power up
Touch screen display
will not power up
Touch screen display not
plugged in or properly, no
power to the PLC, faulty
display, faulty PLC
•
Check to see that the display and PLC are plugged in properly, if this
still does not fix try another display
•
Check that wiring is correct per wiring schematic
•
Check between neutral and both sides of the alarm breaker for 120v
to determine if it is bad
Contactor in
panel will not
engage
Pump will not run
No power to contactor coil,
contactor bad
•
Check voltage at A1 to A2 coil on contractor
•
Check continuity on contactor coil
•
Check for faulty contactor trouble condition
Contactor in
panel engages
but pump will
not run
Pump will not run
No power coming out of
contactor, loose wires,
pump not working
•
Check for power across L1 & L2 (L1 & N) to see if power is going into
the contactor, if no power then check incoming and breaker
•
Then check T1 & T2 to see if it is going through the contactor, if not
then replace the contactor
•
Check voltage at the terminal block to see if power is there
•
If all this is ok then refer to Service Manual for trouble shooting the
pump
