Power Supply Connections; Network/Communication Cables And Connections; Error Codes And Troubleshooting - Pentair FLECK NXT2 Service Manual

POWER SUPPLY CONNECTIONS

Installing the Power Supply:
NOTE: Power Supply includes a harness with 2 black wires
that connect to circuit board, see page 15.
1. Insert black and black transformer wires into 24VDC input
of control.
2510/2750/2815/2850/2900 Valves:
Communication Cables
Hinge Mount: mount per valve model noted
3150/3900 Valves:
Communication Cables
Hinge Mount: mount per valve model noted
18 • Pentair Fleck NXT2 Timer
NETWORK/COMMUNICATION CABLES
AND CONNECTIONS
Use a shielded CAT5 Network/Communication cable.
Connect the network/communication cable first before
programming.
Cable length between timers/units should not exceed 25 feet.
Connect each unit in series (do not form a loop) together from
one communication port to the next communication port. It
does not matter which one goes to the next one.
Wire Harness
Meter Cable
Power Supply
44404 Rev A
Wire Harness
Meter Cable
Power Supply
44403 Rev A

ERROR CODES AND TROUBLESHOOTING

Detected Errors
If a communication error is detected, an Error Screen will
appear.
• All units In Service remain in the In Service position.
• All units in Standby go to In Service.
• Any unit in Regeneration when the error occurs
completes Regeneration and goes to In Service.
• No units are allowed to start a Regeneration Cycle while
the error condition exists, unless they are manually forced
into Regeneration.
• When an error is corrected and the error no longer
displays (it may take several seconds for all of the units
in a system to stop displaying the error message), the
system returns to normal operation.
NOTE: During the error condition, the control continues
to monitor the flow meter and update the volume
remaining. Once the error condition is corrected, all
units return to the operating status they were in prior
to the error. Regeneration queue is rebuilt according
to the normal system operation. Or, if more than
one unit has been queued for regeneration, then the
queue is rebuilt according to which one communicates
first.
Message Displayed Cause For Error
Error Number of NXT2 detected does not match selected system
Valve Count Mismatch type in Master Programming
Motor Stall
The motor is on but no encoder pulses are detected within a
No Changes Detected in the Optical
given duration while homing.
Sensor for 6 Seconds
Motor Run-On The motor is on but no encloder pulses are detected or CAM
No CAM Switch Change Detected Switches change state within a given duration.
Optical Sensor
Undesired change detected by the The motor is off but additional encoder pulses are detected.
Optical Sensor
Over-Current
Motor current exceeds thresholds.
Motor Over-Current is Detected
Flow Meter Error
Flow exceeded specified threshold for a specific duration.
Continuous Flow Detected
Error
During a setting push, a packet was missing.
Send/Receive Failure
Error
The system type among connected units does not match.
System Type Mismatch on Network
Microcontroller Error Calibration or manufacturing test was not performed
100 Days Without Regen 100 Days have expired without a regeneration
Correction
Push correct valve settings in Master
Settings
Check the P11 connection and trigger a
manual regeneration.
Verify correct valve type is chosen. Trigger a
manual regeneration.
Trigger a manual regeneration.
Trigger a manual regeneration.
Trigger a manual regeneration.
Reconnect communication cables and push
setting in Master Settings.
Push correct system settings in Master
Settings.
Contact your Pentair representative.
Trigger a manual regeneration
Pentair Fleck NXT2 Timer • 19