I am attaching a Troubleshooting FAQ’s I found for this power supply. It summarizes the 150 pages of an old thread into a single document. Hope this helps get some questions answered.
0-30V 0-3A Bench Power Supply Unit Troubleshooting FAQ’s.pdf
Here are two SPICE models found online that will simulate the main IC functions including:- a) bar/dot mode selection, dot mode carry for cascaded ICs, c) resistor-programmed hi/lo reference voltages, d) output current selection, e) non-grounded V- and divider ladder, f) independent V+ and Vled, g) leakage current of outputs, h) segment overlap and i) supply current variation with V+ and Vref output load. This model is build by user "alec_t" at electro-tech-online.com forum.