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Z.2. Replacing the fuse
Repairs and maintenance may only be performed by a specialist. Before
working on the unit, switch off the power supply and secure it from being
Danger
switched on again! Check for the absence of power!
Only use the spare fuse supplied or a fuse of the same design with the
following specifications: T 4 A/250 V
Danger
Z.2.1.
Fuse
Z.3. Maintenance
In the course of the general annual maintenance of your heating and
solar system you should also have the functions of the controller
checked by a specialist and have the settings optimised if necessary.
Caution
Performing maintenance:
- Check the time and date (see "7.2. Time and date" on page 26)
- Assess/check plausibility of analyses (see "2. Statistics" on page 16)
- Check the error memory (see "2.5. Message log" on page 16)
- Verify/check plausibility of the current measurement values (see "1. Measurements" on
page 15)
- Check the switch outputs/consumers in manual mode (see "4.2. Manual" on page 18)
- If possible, optimise the parameter settings
Malfunctions
If the mains voltage is switched on and
the controller still does not function or
display anything, the internal device fuse
may be faulty. In that case, open the de-
vice as described under C, remove the old
fuse and check it.
Replace the faulty fuse with a new one,
locate the external source of the error
(e.g. pump) and repair or replace it.
Then recommission the controller and
check the function of the switch outputs
in manual mode first as described under
"4.2. Manual" on page 18.
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