Nordson VersaBlue VB Series, Руководство пользователя

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Troubleshooting
6-22
P/N 7105144G
2008 Nordson Corporation VersaBlue_NW
Others
(contd.)
Problem Possible Cause Corrective Action
Overflow protection
(option) is activated,
although level has fallen
below sensor
Material residue stuck to sensor
causes the alarm
If overflow protection is triggered,
the fault must be acknowledged.
As soon as the level has fallen
below the sensor, it must be
cleaned to prevent material residue
from immediately triggering
another alarm.
The 5-point level sensor
transmits a faulty signal,
causing the fault Level
sensor defective
The sensor can not determine a
constant level at the measuring
points
Material residue is stuck to the
upper measuring point. Remove
residue.
A block of material is added that is
too far from the sensor.
Increase sensitivity if needed
(Refer to Replacing 5-point Sensor
Evaluator (Option) / Calibrating in
the section Repair )
Granulate was poured into the tank
but not distributed evenly
Distribute such that the granulate is
spread evenly around the sensor
Fault Level sensor failure at
5-point level sensor
Wire broken or not plugged in Refer to 5-point Sensor Evaluator
LEDs to determine which cable is
faulty
Melter always switches to
the state Shutdown
One or more control components
on the CAN bus have failed
CAN bus terminating resistors not
connected properly
Check, replace if necessary
Terminate CAN bus on both ends
( Temperature control board −
motor controller or Temperature
control board − pressure sensor )
with resistance as shown in the
wiring diagram.
IPC does not find CAN bus
pressure sensor
The pressure sensor in question
was already used in a different
place and was not removed
properly from the CAN bus.
Switch off the sensor on the control
panel as described in Assigning
New CAN Bus / Analog Sensor
(section Operation ) so that the IPC
can assign the new, correct CAN
address.
Control panel always
shows 0 (analog pressure
sensor)
No sensor is connected, and 0 volt
means ”no pressure.”
Connect sensor and assign on
control panel (Refer to section
Operation )