Appendix
0020262548_00 Operating instructions 23
Setting level Values Unit Increment, select Default setting
Min. Max.
Basic settings → Max. room air humidity →
Max. room air hum. 30 70 %rel 1 40
Basic settings → Default setting →
Time programmes Yes, No No
Everything Yes, No No
Installer level →
Enter code 000 999 1 000
B Troubleshooting
Symptom Possible cause Measure
Display remains dark Software error 1. Switch off the mains switch on all heat generators for approx.
1 minute and then switch them on again.
2. If the fault persists, inform the competent person.
No changes in the display when
the rotary knob is turned
Software error 1. Switch off the mains switch on all heat generators for approx.
1 minute and then switch them on again.
2. If the fault persists, inform the competent person.
No changes in the display
when the selection buttons are
pressed
Software error 1. Switch off the mains switch on all heat generators for approx.
1 minute and then switch them on again.
2. If the fault persists, inform the competent person.
Display view: Button lock act-
ive To unlock, press OK for
3 seconds, it is not possible to
change the settings or values
Button lock is active 1. If you would like to change any of the values, follow the in-
structions on the display.
2. Also read through the Button lock Activate (→ Page 13)
function.
Display view: Restricted opera-
tion/ comfort protection, insuf-
ficient heating up of the heating
and the domestic hot water
Heat pump does not work 1. Inform the competent person.
2. Select the setting for limp home mode until the competent
person arrives.
3. To do this, read through the Implementing the setting when
the heat pump fails (→ Page 17) function.
Display view: Fault F. Fault:
Heat generator 1, the specific
fault code (e.g. F.33) and the
specific heat generator appear
behind F. in the display
Heat generator faults 1. Carry out a Reset fault message (→ Page 17).
2. If the fault persists, inform the competent person.
C Maintenance messages
The maintenance message Service heat pump 1 is an example of a maintenance message that may appear for heat pumps
1 to 7.
The maintenance message Service heat generator 1 is an example of a maintenance message that may appear for heat
generators 1 to 7.
# Message Description Maintenance work Interval
1 Service heat
pump 1
The heat pump requires main-
tenance work.
Refer to the operating instruc-
tions of the relevant heat pump
for information on the mainten-
ance work required
See the operating instructions
for the heat pump
2 Service heat
generator 1
The heat generator requires
maintenance work.
Refer to the operating instruc-
tions of the relevant heat gener-
ator for information on the main-
tenance work required
See the operating instructions
for the heat generator
3 Low water pres-
sure
The water pressure is too low in
the heating installation.
Refer to the operating instruc-
tions for the relevant heat gen-
erator for information on filling
with water
See the operating instructions
for the heat generator
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