Troubleshooting
3A2347ZAA 43
T1D_ Low Temp
Gun
Alarm Gun reached setpoint but dropped
below setpoint and can not
recover.
Check resistance of manifold heater rods.
Refer to gun manual for resistance value.
T4C_ High MZLP
PCB Temp
Alarm MZLP board is overheating. Ambient temperature must be under 120°F.
Replace MZLP board.
T4D0 High Temp
Melter
Alarm Melter continues to raise above the
setpoint.
Verify connector J5 on MZLP board is
securely connected.
Replace melter RTD.
T4D_ High Temp
Hose
Alarm Hose continues to raise above the
setpoint.
Hose electrical connector not plugged into
MZLP.
Replace hose.
T4D_ High Temp
Gun
Alarm Gun assembly continues to raise
above the setpoint.
Hose electrical connector not plugged into
MZLP or manifold electrical connector not
plugged into heated hose.
Replace gun RTD.
T6D0 Sensor Error
Melter
Alarm No reading from RTD. Verify connector J5 on MZLP board is
securely connected.
Replace melter RTD.
T6D_ Sensor Error
Hose
Alarm No reading from RTD. Hose electrical connector not plugged into
MZLP.
Replace hose RTD.
T6D_ Sensor Error
Gun
Alarm No reading from RTD. Hose electrical connector not plugged into
MZLP or manifold electrical connector not
plugged into heated hose.
Replace gun RTD.
T8D_ No Temp Rise
in Gun (all
zones)
Alarm Temperature reading does not
change.
Check fuses F3 and F4 or F7 and F8 on
MZLP that error channel is connected to.
Check resistance of heater rods in gun mani-
fold. Replace gun manifold.
Check resistance of hose wiring. See hose
manual for proper resistance range.
NOTE: Heater rods in the gun manifold can
also cause the no current error.
T8D_ No Temp Rise
in Hose (all
zones)
Alarm Temperature reading does not
change.
Check fuses F5 and F6 or F9 and F10 on the
MZLP that controls the error channel.
Defective heater wires in hose. Replace
heated hose.
Check resistance of hose wiring. See hose
manual for proper resistance range. Replace
heated hose.
NOTE: Heater wires in the hose can also
cause the no current error.
Code Description Type Cause Solution
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