29
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 ex-
change it. Then
fi
rst 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
speci
fi
cations: T2A 250V
Fig.Z.2.1
Fuse
Malfunctions
Summary of Contents for FWC3
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