33
16.2 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 defec-
tive. 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
exchange it.
Then first recommission the contro-
ller and check the function of the
switch outputs in manual mode as
described under 9.2.
Malfunctions
16
16
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 specifications: T2A 250V
Fig.3.1.1
Fuse
16.3. Maintenance
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.
Caution
Performing maintenance:
- Check the date and time (see 12.2)
- Assess/check plausibility of analyses (see 7.4)
- Check the error memory (see 7.5)
- Verify/check plausibility of the current measurement values (see 6.)
- Check the switch outputs/consumers in manual mode (see 9.2)
- Poss. optimise the parameter settings
Summary of Contents for TDC 2
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