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Problem Possible Case Solution
Display is blank Power not applied
Defective unit
Using a volt meter, verify that a voltage between 85 and 265VAC is measured between
the L and N terminal block positions.
Contact technical support for additional help and instructions.
Display is dim Display intensity
parameter is too low
Editing and increasing the display intensity parameter should cause the display digits to
become brighter.
When power is
applied, “LF-L” is
displayed
AC line supplying
power to unit has too
much noise
AC line supplying
power to unit has an
abnormally low
frequency
Review routing of power wires in machine to minimize electrical noise. Look for other
devices which share the same circuit which may be producing unacceptable levels of line
noise. In some applications, such as welding equipment, a careful regiment of applying
an AC line filter, re-routine wires, dividing circuits, using shielded cable, and properly
grounding devices will usually solve the problem.
The unit is designed to operate with AC lines from 48-62 Hertz (cycles per second).
When power is
applied, “LF-H” is
displayed
AC line supplying
power to unit has too
much noise
AC line supplying
power to unit has an
abnormally high
frequency
Review routing of power wires in machine to minimize electrical noise. Look for other
devices which share the same circuit which may be producing unacceptable levels of line
noise. In some applications, such as welding equipment, a careful regiment of applying
an AC line filter, re-routine wires, dividing circuits, using shielded cable, and properly
grounding devices will usually solve the problem.
The unit is designed to operate with AC lines from 48-62 Hertz (cycles per second).
The first or second
alarm output does
not seem to
function
Second alarm output
parameters not
configured properly
Second alarm output parameters not configured properly
Review alarm output #2 parameters. The first and second alarm relay outputs can be
tested by selecting the “Always On” value for the Activation Condition parameters for the
respective alarm output. When doing this, the relay click should be audible and the NC
(Normally Closed) and C (Common) terminals should become internally shorted at the
terminal block.
Troubleshooting