A LO LOAd display is usually displayed just before the Insulation test.  The tester checks the load (Watts) presented by the equipment which is being tested but it can’t read below about 200 Watts. 

If the Wattage of the equipment is below this level, for example a 23 Watt battery charger, the LO LOAd will be displayed; it is not a fault condition, it is only indicating that it can’t see a load.  You simply press the selected button again and the tester will continue with the test. 

The usual cause for this display is that you may not have switched the equipment on in which case switch it on and press the button again.

Written By Austin