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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.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 4.2.
Fuse
Malfunctions
Danger
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!
Only use the supplied spare fuse or a fuse of the same design with the
following specifications: T2A 250V
Z.2 Replacing the fuse
Z.2.1
Performing maintenance:
- Check the date and time
- Assess/check plausibility of statistics (see 2.)
- Check the error memory (see 2.7)
- Verify/check plausibility of the current measurement values (see 3.)
- Check the switch outputs/consumers in manual mode (see 4.3)
- Possibbly optimise the parameter settings
Z.3 Maintenance
Caution
In the course of the general annual maintenance of your heating system
you should also have the functions of the controller checked by a specialist
and have the settings optimised if necessary.