The primary fuse is blown quite often. Can I replace it with a higher value?
Generally, every fuse should only be replaced with one of the same type! However, we have changed the primary fuse capacity of this controller in the past: 115V: T2.5 A/E – 250V —> T3.15A/E – 250V 230V: T1.25 A/E – 250V —> T1.6 A/E – 250V Tests showed that the older devices with the lower capacity can also safely be equipped with the higher values. Use only slow-blow fuses!