Graco InvisiPac HM10 Instructions Manual page 77

Code Description
DADX* Pump Runaway
ER4L Downgraded 2
Channel
L6FX Level Sensor Error
L8FX* Refill Error
T4D0 High Temperature:
Melter
(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
Melter ran out of adhesive ✓Add pellets to the feed system.
Worn or damaged pump
seals
The license key removal
timer has expired, and one
or more channels were
disabled.
Level sensor is not reading
within expected range
Adhesive refill timed out
before completing
Melter temperature
deviated above setpoint
Solution
✓Reduce the adhesive flow rate.
✓Verify the adhesive temperature setting.
✓See Fill System Verification Checklist,
page 73.
✓Inspect the pump seals.
✓Replace if necessary. See Prepare for Melter
Pump Repairs, page 88.
✓If 4 channel operation is still desired, reinstall the
license key.
✓Check the level sensor connection. See Install
the Level Sensor, page 84.
✓See Fill System Verification Checklist,
page 73.
✓Refill the feed system and inspect for bridging or
blocking.
✓Check the feed hose and wand for plugged
material.
✓Verify the air supply and pressure are sufficient
for the system.
✓See Fill System Verification Checklist,
page 73.
✓Check that the melter temperature sensor RTD
is fully seated in the melter.
✓Verify the over-temperature switch connection
to J1-OT on the AMZ circuit board. Check
continuity.
✓Replace melter temperature sensor RTD if fully
seated and the temperature on the screen is not
stable. See Replace the Temperature Sensor
(RTD), page 85.
Error Codes
77