50
MGT 2” 60M–600M NXT2 SYSTEM 14 DEMAND
MAINTENANCE
TROUBLESHOOTING
DETECTED ERRORS
NOTE: It can take up to 30 seconds for an error to be detected and displayed. All errors on each timer in the
system must be displayed before the errors can be corrected.
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 re
-
maining. 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
Correction
"Error
Valve Count Mismatch"
Number of NXT2 detected does not match
selected system type in Master Programming
"Push correct valve settings in Master
Settings"
"Motor Stall
No Changes Detected in the Optical
Sensor for 6 Seconds"
The motor is on but no encoder pulses are
detected within a given duration while homing.
Check the P11 connection and trigger a
manual regeneration.
"Motor Run-On
No CAM Switch Change Detected"
The motor is on but no encloder pulses are
detected or CAM Switches change state within
a given duration.
Verify correct valve type is chosen.
Trigger a manual regeneration.
Optical Sensor Undesired change
detected by the Optical Sensor
The motor is off but additional encoder pulses
are detected.
Trigger a manual regeneration.
"Over-Current
Motor Over-Current is Detected"
Motor current exceeds thresholds.
Trigger a manual regeneration.
"Flow Meter Error
Continuous Flow Detected"
Flow exceeded specified threshold for a specific
duration.
Trigger a manual regeneration.
"Error
Send/Receive Failure"
During a setting push, a packet was missing.
Reconnect communication cables and
push setting in Master Settings.
"Error
System Type Mismatch on Network"
The system type among connected units does
not match.
"Push correct system settings in Master
Settings."
Microcontroller Error
Calibration or manufacturing test was not
performed
Contact your Pentair representative.
100 Days Without Regen
100 Days have expired without a regeneration
Trigger a manual regeneration
