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Troubleshooting
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 remain-
ing. 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 sys-
tem 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
Causes 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 encoder 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 Watts representative
100 Days Without Regen
100 Days have expired without a regeneration
Trigger a manual regeneration
