The PLM amplifiers will indicate a "load fault" on any channels that are receiving input, but have nothing connected to an output. Could it be that you have nothing connected to the outputs indicating load fault? The lake controller software will simply show a load fault on the module, even if some of the outputs have no fault. If you look on the amplifier display, it will indicate which channels are seeing a load fault in the metering section.
We have presets for a triamped configuration that are outputs 1,2,3,4 as sub, sub, mid, hi, respectively. If we are using only one subwoofer, the module will indicate a load fault in Lake Controller because the second sub channel has no connection. It can be annoying constantly seeing the fault indicator during a show. The front panel shows the fault only on the second sub channel. No harm, no foul.