Graco 24T918, Instruction Manual

Page: 45 / 130

Troubleshooting
333347F 45
T8D_ No Temp Rise in
Hose (all zones) Alarm Temperature reading does not change.
Check fuses F5 and F6 (channels 1, 3, 5) or F9
and F10 (channels 2, 4, 6) on the MZLP that con-
trols the error channel.
Defective heater wires in hose. Replace heated
hose.
NOTE:
Defective heaters wires in the hose can
also cause the no current error.
Heated hose electrical connector or wires are
defective. Check resistance of hose wiring. See
hose manual for proper resistance range.
T8D0 No Temp Rise in
Melter (all
zones) Alarm Temperature reading does not change. Check fuses F1 and F2 on MZLP with daughter
board.
Defective heater wires in melter. Replace melter.
NOTE:
Defective heaters wires in the melter can
also cause the no current error.
Defective heater element(s). Check heater resis-
tance and compare to reference table. See
Check Heater Rod Resistance
, page 54.
Check J1 is properly plugged into the MZLP with
daughter board and in J3 on AWB.
Check that RTD is installed in the melter.
V1I_ Low Can Volt-
age Alarm Bad or overloaded power supply. Verify power supply voltage is 24 VDC. If voltage
is low, disconnect the screw terV and -V
on the power supply and re-check voltage read-
ing. If voltage is correct, then disconnect J8 and
J9 from AWB and re-check voltage. If still low
replace AWB. If correct, plug in J9 and recheck
voltage. If low, replace ADM. If correct, plug in
J8. If low, replace MZLP. If voltage is still low,
replace power supply.
V1MW Low Line Volt-
age Devia-
tion Incoming line to line voltage has
dropped below 175V. Verify incoming power is correct gauge for cur-
rent draw and verify incoming power lines are
securely attached to disconnect.
V4I_ High Can Volt-
age Alarm Bad or overloaded power supply. Verify power supply voltage is 24 VDC. If voltage
is high, replace power supply unit.
V4MW High Line Volt-
age Alarm Incoming line to line voltage has
increased above 265V. For 3 phase with neutral have qualified electri-
cian verify neutral wire.
V6MW Invalid Power
Type Alarm During startup incoming line to line
power was either below 175V or above
265 V. Verify incoming power is wired to the disconnect
correctly.
V8M_ No line voltage Alarm Incoming line voltage is less than
100 VAC. Measure incoming power with system
unplugged. If line voltage is less than 100 VAC,
contact qualified electrician to correct the low
voltage.
WJDX Pump Solenoid
Error Alarm No voltage draw from air solenoid for
air motor. Check connector is properly connected to J13 of
the daughter board.
Defective air manifold, replace manifold.
WKFX Fill Solenoid
Error Alarm No voltage draw from air solenoid for
fill. Check connector at J13 of the daughter board.
Defective air solenoids. Replace. See page 72.
WSUX USB Invalid
Configuration Devia-
tion A valid configuration file can't be found
for the USB. System is not properly loaded with correct soft-
ware. Perform
Software Update Procedure
on
page 77. Retry USB download.
Bad ADM. Replace ADM.
Code Description Type Cause Solution