DIAGNOSTICS 7-7
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action that may need to be taken.
Table 7-2. Help codes and error messages for the Filament Power Supply.
Help Code
or Error
Message
Description
Possible Causes
and Corrective
Action
HLP 1
Current Latch – A high
current was encountered.
Power supply latched off to
prevent a failure.
Switch off the power until the
display is dark and then switch
the power back on to reset
HLP 2
Thermal Failure.
Open or shorted thermistor
detected. Contact KRI.
HLP 3
Broken Filament. -
BROKEN FILAMENT LED
and
fi
lament beeper are
on.
Change the
fi
lament.
Open and close the interlock, or
switch off the power until the dis-
play is dark and then switch the
power back on to clear the help
code.
HLP 7
RS-485 Serial Commu-
nication Lost. - HLP 7 is
displayed when the unit is
in REMOTE and unit is in
STANDBY.
Communication for remote RS-
485 communication was detected
and then lost.
Check connection of the RS-485
cables.
Make sure Auto Controller has
input power and is turned on.