Graco 3A0868G Alarm and Description Cause Solution QTA1 or QTB1, Dose Time Error, Qlax or Qlbx

System Errors

Alarm and Description	Cause	Solution
QTA1 or QTB1	System is in Mix mode and gun is only par-	Fully trigger the gun.
Dose Time Error	tially triggered, allowing air but no fluid to
The gun trigger is active, but	pass through gun.
no A pump (QTA1) or B pump
	Fluid flow rate is too low.	Increase flow rate.
(QTB1) movement is detected
	Slow actuation of component A or B valves.	See Ratio Low Error and Ratio High
during the dose time selected.		Error, pages 56-57.
	A or B pump has no air pressure.	Verify that main air supply is turned
		on and valves are open.
	There is an air leak downstream from the	Check the air lines for leaks and
	air flow switch.	repair.
	The air flow switch is stuck open.	Clean or replace air flow switch.
QLAX or QLBX	A or B dose valve leak	Replace valve needle and seat.
Leak Error
	A or B pump is not seating and continues	Replace pump packings, balls, and
Pump A (QLAX) or Pump B
	to move/creep.	seats.
(QLBX) is running with all
valves closed.
DJA1 or DJB1	Sensor not recognized by system.	Verify that sensor is plugged in. Verify
Linear Sensor Error		that sensor and AFCM are opera-
System does not detect the		tional. Verify cable connections.
pump A (DJA1) or pump B		Replace any malfunctioning compo-
(DJB1) linear position sensor,		nent.
or has an invalid position read-
	Magnet fell off.	Replace magnet and holder on top
ing.		side of air motor piston.
	Sensor readings are out of range.	Verify that the sensor is threaded
		down
		completely.
DKA1 or DKB1	Reed switch installed backward.	Flip reed switch 180 degrees to align
Reed Switch Error		with magnet in air valve.
System does not detect the
	Reed switches are stuck, or both reed	Verify cable is connected on both
pump A (DKA1) or Pump B	switches are on at once	ends. Verify that reed switch, cable,
(DKB1) reed switch sensor, or		and AFCM are operational. Replace
detects an invalid state.		any malfunctioning component.
	Magnet in air valve not functioning prop-	Verify that magnet is installed prop-
	erly.	erly and is operational.
P4A1 or P4B1	Pump air pressure is set too high.	Reduce pressure on air supply to sys-
Pressure High Error		tem or pumps.
System detects a high pres-
	Thermal expansion occurring in lines.	Relieve pressure if system has been
sure reading on pump A		idle. Decrease environmental
(P4A1) or pump B (P4B1).		temperature.
	Pressure transducer malfunction.	Replace transducer. Verify that cable
		and AFCM are operational.
P6A1 or P6B1	Pressure transducer malfunction.	Replace transducer. Verify that cable
Pressure Transducer Error		and AFCM are operational.
System does not detect pres-
sure transducer A (P6A1) or
pressure transducer B (P6B1).

58 3A0868G