Product manual

Troubleshooting
5-5
Part 1105120-01
E 2013 Nordson Corporation
Corrective ActionPossible CauseProblem
Fault 20:
FAULT RF DETECTOR
TRIP
RF Fault.
High RF field detected.
RF Detector is detecting a high
level of RF
Make sure the RF screen is not
missing, loose, or damaged.
Incorrect RF detector mounting
location.
Refer to page 3-22 for mounting
requirements.
Fault 22:
FAULT LAMPHEAD
OVER TEMP
Lamphead temp is over
95 _ C.
Cooling air is being restricted. Make sure air flow through lamphead
is not restricted. Refer to Corrective
Actions for Fault 16.
Fault 23:
FAULT HV CABLE
UNPLUGGED
System controller not
communicating with
lamphead.
Unicable not connected or
damaged.
Check unicable connections and
continuity. See Figures 8-1 and 8-2,
System Schematics.
Light detector board in lamphead
unplugged or failed.
Check the internal connections to the
light detector board. Replace board if
all connections are good.
Fault 24:
FAULT LOW CURRENT
ON MAGS
Magnetron Current Fault
Magnetron current cannot
be maintained.
Open HV circuit to magnetrons. Check black and white high-voltage
cables to magnetrons.
Wiring to magnetrons not
connected properly.
Verify wiring connections.
HV transformer taps set incorrectly
in system controller.
Refer to the Transformer Tap Table
on page 3-3 to verify settings.
Failed diode block in system
controller.
Test diode block as described on
page 5-8. Replace diode block if
failed.
Magnetrons at end of life. Replace magnetrons.
Failed contactor. Replace contactors.
Failed diode block (open diode) in
system controller.
Test diode block as described on
page 5-8. Replace diode block if
failed.
Damaged main control board
(defective relay #1).
Replace main control board.
Fault 25:
FAULT PHASE CTRL AT
LIMIT
Phase control at limit.
System controller is unable
to regulate the system to
the specified output level.
HV transformer taps set
incorrectly.
Refer to the Transformer Tap Table
on page 3-3 to verify settings.
Phase control board failed. Replace phase control board.
Fault 26:
FAULT RF DETECTOR
FAILED
RF Fault.
RF Detector failed self-test.
RF detector self test fails or
detector has been permanently
damaged by a very high RF field.
NOTE: This failure is only
possible under extreme conditions.
Replace RF detector. Refer to RF
Detector Installation on page 3-22.
Continued...