Alarms - Graco InvisiPac HM10 Instructions Manual

Alarms

Shuts system down
Code Description
A2D0* Low Current: Melter
A4D0 High Current: Melter
A4D(C) High Current:
Applicator Zone or
Hose Zone (AMZ)
A4FX High Current: Fill
Solenoid
A4PX High Current: Pump
Solenoid
A4SX High Current: 24
VDC Supply
(C): Channel and component-specific error. See Zone (C) Lookup Table, page 74 for component error zone.
* Does not shut down system or melter zone
3A7259C
Cause
Current through the melter
heating rods is less than
expected
High current through the
melter heater rods
Heater rods in applicator
manifold
Heater wires in hose
The fill solenoid wire
shorted
The fill solenoid drew
excessive current
The pump solenoid wire
shorted
The pump solenoid drew
an excessive current
Short in PLC I/O wiring
Short in the material
tracking wiring
Short in the level sensor
wiring
Solution
✓One or more of the fuses in the fuse harness
assembly is blown.
✓Remove short with corresponding melter heating
rod and replace the fuse.
✓Check melter heat rods resistance. See Check
Melter and Pump Heater Resistance, page 98.
✓Check for excessively high system line voltage.
✓Install a properly functioning applicator or hose.
✓Refer to your applicator and hose manual for
nominal heater wire resistance. Check resistance
and replace the hose if necessary.
✓Check for damaged wiring.
✓Verify the fill solenoid connection to J6-FILL of
the AMZ circuit board. See Electrical
Schematics, page 105.
✓Replace the fill solenoid. See Replace an Air
Control Solenoid, page 87.
✓Check for damaged wiring.
✓Verify the pump solenoid connection to
J6-PUMP of the AMZ circuit board. See Electrical
Schematics, page 105.
✓Verify the solenoid resistance is 97 to 115 ohms.
✓Replace the pump solenoid. See Replace an Air
Control Solenoid, page 87.
✓Unplug PLC I/O wiring from J8 of the AMZ
circuit board.
✓Check the resistance from power to ground.
✓Unplug unit counter from J10 of the AMZ circuit
board.
✓Check the resistance from power to ground.
✓Verify the solenoid resistance is 97 to 115 ohms.
✓Unplug the level sensor from J4 of the AMZ
circuit board.
✓Verify the level sensor connection to J4 of the
AMZ circuit board
Error Codes
75