Nordson ProBlue Flex, Manual

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OLED User Interface
116
Part 1128351_02
E
2020 Nordson Corporation
Heater Sub System Alarms
The following table details the troubleshooting tips to resolve Alert and Fault
conditions.
Alarm
Type
Short Description
Details
Troubleshooting Tips
Alert
Zone Over Temperature
Alert
The zone exceeds the
programmed upper
temperature limit. If alert
remains active for more than
2 minutes, a Fault will occur. Check heater connections
for intermittent wiring, open
circuit condition, and for
external conditions that may
cause a rise in component
temperature.
Fault
Zone Over Temperature
Fault
The zone remains above
programmed upper
temperature limit for more
than 2 minutes.
Check power module LEDs
for heater stuck on condition.
Replace power module.
Alert
Zone Under Temperature
Alert
The zone is below the
programmed lower
temperature limit. If alert
remains active for more than
2 minutes, a Fault will occur.
Check heater connections
for intermittent wiring, open
circuit condition, and for
external conditions that may
cause a drop in component
temperature.
Fault
Zone Under Temperature
Fault
The zone remains below the
programmed lower
temperature limit for more
than 2 minutes.
Alert Zone Open Circuit
No heater current is
detected for this zone. Check for loose or broken
heater connections, an open
heater circuit, or a blown
fuse.
Fault Zone Heater Stuck On
Heater current is detected
when the zone is disabled.
Replace the Power Module.
Alert Zone Device Disconnected
No RTD/heater current is
detected for the zone Check for disconnected or
damaged connector. Disable
zone if not needed.
Alert
Zone RTD Open
The RTD resistance
exceeds the open circuit
threshold. If condition
continues for 2 minutes, a
fault will occur. Check for intermittent or
broken RTD connections.
Verify the resistance. It
should measure between
100 and 300 ohms. For
example,
S
32
_
C (90
_
F): 143.59
ohms
S
49
_
C (120
_
F): 156.94
ohms
S
177
_
C (351
_
F): 277.48
ohms
Fault
The RTD resistance
exceeds the open circuit
time threshold.