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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,
disconnect the device, open it, remove
the old fuse and check it. Replace the
defective fuse with a new one, locate the
external source of the error (e.g. pump)
and replace it. Then first re-commission
the controller and check the function of
the switch outputs in manual mode as
described in Chap. 3.2.
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
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 optimized if necessary.
Performing maintenance:
- Check the date and time (see 6.12)
- Assess/check plausibility of analyses (see Chap. 2)
- Check the error log (see Chap. 2.4.)
- Verify/check plausibility of the current measurement values (see Chap. 1)
- Check the switch outputs/consumers in manual mode (see Chap. 3.2)
- If needed, optimize the parameter settings
