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USER'S MANUAL
FAULT CONDITIONS
PEAK CURRENT OVERLOAD
If the peak output current exceeds 40 amps, the
output is disabled and an error message is displayed
(
Fig. 4.9
).
This is usually caused by a short circuit between
the anode and cathode. The LR-24 can be reset by
releasing the switch on the anode pole and pressing
it again.
OUTPUT IGBT FAILURE
If there is an Output Switch (IGBT) Failure, the
LR-24’s output is shut off and an error message is
displayed
(
Fig. 4.10
).
The criteria for an Output Switch Fault is that output
voltage has been detected when there should be
none. For example, if the anode pole switch is not
activated, there should be no output from the LR-24.
If, however, output is detected, then an Output Switch
Fault exists and the LR-24’s output will be disabled.
The LR-24 must then be sent back to Smith-Root
for repair. Do not attempt to use the LR-24 if this
message appears, as a safety hazard may exist and
further use may cause more damage to the LR-24.
AVERAGE CURRENT OVERLOAD
The input and output currents of the LR-24 are
constantly monitored while in use. If these currents
become excessive, the LR-24 will shutdown its output
to prevent damage to it’s circuits. Releasing the pole
switch and selecting a lower output voltage or lower
duty cycle waveform should clear this fault (
Fig. 4.11
).
SECTION 4: SAFETY FEATURES DESCRIPTIONS (CONT.)
*****ERROR*****
Peak Amps Overload
Remove Short Circuit
before proceeding.
Fig. 4.9
*****ERROR*****
Output IGBT Failure
Turn off unit and
contact Smith-Root.
Fig. 4.10
*****ERROR*****
Inverter Overload
Reduce Output to
200 Volts (Enter).
Fig. 4.11
both of the audio alarms will
begin to beep simultaneously
and the
Thermal Limit
display
will show the set frequency,
or voltage, in the case of
DC output and the reduced
frequency or voltage based on
the internal temperature of the
LR-24. This display is shown
as long as the pole switch is
pressed. When the switch is
released the standard status
display is shown. This allows
you to see what the LR-24 is
doing and what the internal
temperatures are. It also allows
users to continue to monitor
the battery if desired. This
option is explained in greater
depth under
System Menu 4
TEMPERATURE CONT.
SECTION 4