You could check the output voltage of the power supply. If it is under the specific voltage (12V) it will look like you going to get more HW errors.
The number of HW errors is not important. It's the percentage.
0.1% is a very acceptable HW Error percentage for a Bitmain AntMiner's
Ok cool thanks, and am I right in saying the nonce % number in the dashboard, is that the percentage you just mentioned?