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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 C, 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 “3.2. - Manual” on page 24
DANGER
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
Only use the supplied spare fuse or fuses of the same design with the following specifications: T2A / 250V .