Technical data

Troubleshooting
6-6
P/N 7135049A
E 2007 Nordson Corporation
VBC_Siemens
Material Pressure too High
Problem Possible Cause Corrective Action
Safety valve or pressure
control valve dirty and thus
blocked
− Disassemble and clean or replace
Safety valve or pressure
control valve defective
− Replace
Pressure control valve set
incorrectly
− Set to default
Pneumatic pressure control
valve (option) pressurized
with too high pressure
− Reduce pressure
Material Pressure too Low
Problem Possible Cause Corrective Action
Gear pump is worn − Replace pump
Safety valve does not close
any more
− Replace
Pressure control valve dirty
and thus clogged
− Disassemble and clean or replace
Pressure control valve
defective
− Replace
Pressure control valve set
incorrectly
− Set to default
Pneumatic pressure control
valve (option) pressurized
with too low pressure
− Increase pressure
Incorrect Motor Rotation in Key-to-line Mode
Problem Possible Cause Corrective Action
Line speed signal
fluctuates during constant
machine speed
Encoder defective or loose contact Replace
Drive element (e.g. belt) slips Eliminate slip