Nordson Encore XL Powder, Manual

Page: 69 / 155

© 2021 Nordson Corporation
1607027-01
7-5 Troubleshooting
Problem Possible Cause Corrective Action
11. Reclaim or virgin
transfer pump
turned off but
continues to run
Solenoid valve in manual
override (reclaim SOL
336, virgin SOL 338)
Check the solenoid valve in the control manifold. Make sure the
manual operator on the valve is not in override position.
Solenoid valve failed
open
Replace the valve.
12. Virgin transfer
pump is turned
on but pump not
running
Level sensor on feed
hopper is detecting
powder in hopper
The pump will not turn on until the powder level falls below the
level sensor and the delay timer runs out.
Refer to Problem 10 for
other causes
13. Virgin transfer
pump does not stop
automatically
No powder supply at
bulk feed system
Check the virgin powder supply.
Feed hopper level
sensor not adjusted
properly
Level sensor stops pump when it detects powder. Sensor
indicating light should be yellow when powder is detected. Adjust
the level sensor if it is not detecting powder. Refer to level sensor
documentation.
Level sensor failed or
wiring defective
Check level sensor and wiring. Repair or replace as needed.
14. Reclaim and/or
virgin transfer
pump purge cycle
does not start when
Purge switch turned
to Pump Purge
position
Reclaim and virgin
transfer pumps not
turned on
Pumps must be on before purge can start. Turn on pump to be
purged.
Switch or wiring
defective
No signal from switch to controller. Turning the switch to Pump
Purge position should turn on signal. Check switch and wiring,
repair or replace as needed.
Control manifold purge
solenoid valves or wiring
defective
Check for air output from solenoid valve SOL 340 (reclaim), SOL
342 (virgin). Refer to the
Overview
section for the solenoid valve
location. Check air supply to control manifold. Check cable
wiring. Repair or replace as needed.
Purge air process
valve or pilot air tubing
defective
Check pilot air tubing. Make sure air signal is reaching process
valve in pump station. Check process valve operation. Check air
supply to process valve. Repair or replace as needed. Refer to
pump station manual 1620734.
Continued...