Qta1 Qta2 Qta3; Dose Time A Error; Qlax Leak Error A; Leak Error B - Graco ProMix 2KE Operation

System Errors
Alarm and Description
QTA1, QTA2, QTA3, or QTB1
Dose Time Error
The gun trigger is active, but
no A pulses (QTA1, QTA2,
QTA3) or no B pulses (QTB1)
are detected during the dose
time selected.
QLAX or QLBX
Leak Error
Meter A (QLAX) or Meter B
(QLBX) measures fluid with all
valves closed.
60
Cause
System is in Mix mode and gun is only
partially triggered, allowing air but no fluid
to pass through gun.
Fluid flow rate is too low.
Flow meter or cable failed or flow meter
clogged.
Dose time setting is too short for the cur-
rent flow rate.
Slow actuation of component A or B
valves.
The supply pump is not turned on.
There is an air leak downstream from the
air flow switch.
The air flow switch is stuck open.
Pressure on circulation system is fluctu-
ating and generating meter pulses.
Valve is leaking.
Gun, manifold, or line is leaking.
Solution
Fully trigger the gun.
Increase flow rate.
To check meter sensor operation,
remove meter cap to expose sensor.
Pass a ferrous metal tool in front of the
sensor.
If there is a meter or cable failure, you
will see a large difference between the
amount of fluid dispensed and the flow
meter volume displayed by the Display
Module. Clean or repair meter as nec-
essary.
Increase the dose time setting.
See Ratio Low Error and Ratio High
Error, pages 57-58.
Turn on the supply pump.
Check the air lines for leaks and repair.
Clean or replace air flow switch.
Replace check valve in front of meter.
Replace valve seat, valve, or valve seal.
Repair leak downstream of meters.
TI12792a
3A0869C