36
Z.2 Replacing the fuse
If the mains voltage is switched on and the controller still does not function or display
anything, then the internal device fuse may be defective. In that case, open the device as
described under 3.1, remove the old fuse and check it.
Exchange the defective fuse for a new one, locate the external source of the error (e.g.
pump) and exchange it. Then first recommission the controller and check the function of the
switch outputs in manual mode as described under 9.2.
Repairs and maintenance may only be performed by a specialist. Before working
on the unit, switch off the power supply and secure it against being switched on
again! Check for the absence of power!
Danger
Danger
Only use the supplied spare fuse or a fuse of the same design with the following
specifications: T2A 250V
Malfunctions
Fig.Z.2.1
Fuse
