JUMO 709061 TYA 201 - Single-Phase Power Controller Operating Manual - Manual (Page 103)

2012-12-01/00561071 [SCR Power Controller TYA201] 101
8 Fault messages and alarms
h Undo 2 hexagon head screws
h Replace the defective semi-conductor fuse with a new one.
h Tighten the screws with the specified tightening torque
Re-assembling
the case
h Push the plastic case back into the guide rails until the spring clip engages.