Troubleshooting and Fault Recovery
309738L
47
Troubleshooting and Fault Recovery
The following table describes the valid fault codes used
by the PrecisionFlo LT module, possible causes, and
solutions. PrecisionFlo LT module displays warnings
and alarms on the user interface and alarms via the con-
trol unit fault light.
•
Alarms set the dispenser ready signal LOW.
•
Warnings
do not
set the dispenser ready signal
LOW.
Resetting Control Unit After a Fault
If a fault has occurred, you should clear (reset) the fault
before restarting the PrecisionFlo LT control unit. Press
the fault reset key
to clear the fault, or press the ?
key for additional information.
Table 9 – Fault Priority Table
Fault
Priority
Fault Name
Fault
Description
Causes
Solutions
The following faults are
always
Alarms
2
Dispenser
Stop
There is no electrical
power
E-Stop has been pressed
Turn E-Stop switch to release
Green and/or red light not lit, con-
trol assembly is off
Apply power to PrecisionFlo LT
module
5
Closed Gun
Flow
System reading flow
meter pulses from Flow
Meter with Gun closed.
These meter pulses cor-
respond to a flow rate
that is greater than 1000
cc/min
Dispense hose leak
Check hose; replace if needed
Flow meter providing false pulses
Replace flow meter sensor or cali-
brate meter (corilis)
Dispense valve not operating
properly
Repair dispense valve
Flow meter providing false pulses
Replace flow meter sensor
The following faults are
always
Warnings
1
Communica-
tion Error
Communication has
been lost between the
control board nd the dis-
play board
The display board and the control
board are no longer communicat-
ing
Repair any loose or disconnected
wires in the connectors between
the two circuit boards
Replace one or both of the circuit
boards if their “heartbeat” LEDs
are no longer blinking
Replace the wiring harness
between the two circuit boards
3
Power Up
Control box power up
4
Calibration
Error
System was not able to
complete a flow calibra-
tion
Flow setpoint higher than the flow
rate the system can deliver
Lower calibration flow setpoint
Increase dispense valve tip size or
dispense hose diameter
Increase supply pressure
Regulator worn or not operating
properly
Repair regulator
A dispense command in flow
mode was received without a
valid flow calibration being per-
formed
Perform a flow calibration
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