Troubleshooting
6-4
Part 1061253B
E 2006 Nordson Corporation
General Troubleshooting (contd)
Problem Possible Cause Corrective Action
11. Magnetron current
imbalance
Fault Message:
F IBAL
The current from magnetron 1 and
magnetron 2 has differed by more
than 100 ma for a time longer than
600 ms
Check the SCRs and phase control
board. Check that the fuses are ok.
Magnetron current has fallen
below 200 milliamps
Check the diode block five ohm
feedback resistor for short or open.
12. Open filament
transformer circuit
Fault Message:
F FUSE
Filament transformer fuse blown Check fuse on main circuit board.
Filament transformer bad Check output of filament transformer.
Short or open in cable to filament
transformer
Remove the LV cable from the power
supply and check Pin 9 and Pin 10
for continuity.
Filament in magnetron failed Replace the magnetron.
13. High current on the
high voltage circuit
Fault Message:
F MAG
Short in unicable Replace the unicable.
Short in the magnetron Replace the magnetron.
