18
7 Troubleshooting
Type of malfunction
Possible causes
Correction
No product or too little
product.
– Product feedline and/or pneumatic
hose not connected correctly or
kinked.
•
Connect the product feedline correctly.
If kinked, replace it.
– Control pressure not adequate.
Control pressure must be between
5 and 7 bar.
•
Check and adjust the control pressure.
– Curing in the product feedline or in
the dispensing needle.
– Curing in the diaphragm valve.
•
Replace the product feedline and/or the
dispensing needle.
•
Replace the shutoff valve
4
and the
diaphragm
3
.
– Controller incorrectly adjusted.
•
Check the controller setting (see
operating manual for the controller).
– Product reservoir not switched on,
depressurized or pressure is too
low.
•
Check the reservoir (see operating
manual for the product reservoir).
Diaphragm valve does
not open.
– Actuator
2
of the valve is
contaminated with product.
•
Replace the actuator
2
and the
diaphragm
3
.
Dispensing operation is
irregular.
– Actuator
2
and shut off valve
4
are
tightened too much.
•
Back off actuator from shut off valve,
proceeding in small steps,
90° max (1/4 turn).
Dispensing sequence
too short despite long
time setting.
– Disassemble valve and push button
on controller to actuate the actuator:
> air escapes at the plunger.
•
Replace the actuator
2
and the
diaphragm
3
.
