Nordson PURBlue EC - F4 Fault

Troubleshooting
6-4
P/N 7135268B
E 2008 Nordson Corporation
PURBlue EC
F4 Fault
When the melter detects an F4 fault:
1. The Ready LED turns off and the red Fault LED lights up.
2. All of the component key LEDs (tank, hose and gun) turn off.
3. The right display indicates F4.
4. The left display indicates a subcode. The subcode classifies the fault as
being fatal or nonfatal. These two classes of F4 faults affect the melter
like this:
Fatal — The Fault LED turns on and stays on; the melter stops
functioning completely.
Nonfatal — The Fault LED turns on for five seconds, but the heaters
and pumps continue to operate normally.
5. The melter records the fault in the fault log. Refer to Fault Log in this
section.
Helpful Information
An F1 fault (RTD) can be temporarily dismissed and the system returned to
normal mode by pressing the Clear/reset key. The heaters will remain off. If
the fault condition still exists two minutes after pressing the Clear/reset key,
the Fault LED will turn back on.
If, for any reason, a component reaches 235_C (458 _F), an immediate F3
fault will occur (no two-minute monitoring period).
When an F1 fault occurs, you can determine whether the fault was caused
by an open or shorted RTD by simultaneously pressing both of the right
display scroll keys. If the right display indicates OP, the RTD is open; if it
indicates SH, the RTD has shorted.
To view the temperature of a heated component when an F2 or F3 fault
exists, simultaneously press and hold down both of the right display scroll
keys.
If F4 appears in the right display when the Seven-day clock key is pressed,
the internal clock (realtime clock) has failed.