Appendix; A Troubleshooting, Maintenance Message; A.1 Troubleshooting; A.2 Maintenance Messages - Vaillant sensoCOMFORT VRC 720f Manual De Uso

Appendix

Appendix
A Troubleshooting, maintenance message
A.1 Troubleshooting
Symptom
Display remains dark
Display: Mode: Back-up boiler
if fault occurs Heat pump (call
the comp. person), insufficient
heating-up of the heating and
the domestic hot water
Display: F. Boiler fault, the
specific fault code (e.g. F.33)
with the specific boiler is shown
in the display
Display: You do not understand
the set language
A.2 Maintenance messages
# Message Description
1 Water defi- The water pressure is too low in
ciency: Follow the heating installation.
the instructions
in the heat gen.
B -- Troubleshooting, maintenance message
B.1 Troubleshooting
Symptom
Display remains dark
No changes in the display can
be made via the control ele-
ments
Heat generator continues to
heat once the room temperature
has been reached
The heating installation remains
in domestic hot water mode
Only one of several heating
circuits is displayed
It is not possible to switch to the
installer level
108
Possible cause
The batteries are flat
Heat pump does not work
Boiler fault
Incorrect language set
Maintenance work
Refer to the operating instruc-
tions for the relevant heat gen-
erator for information on filling
with water
Possible cause
The batteries are flat
The product is defective
Software error
The product is defective
Incorrect value in the Room
temp. mod.: or Zone assign-
ment: function
Heat generator cannot reach
the max. target flow temperat-
ure
Heating circuits inactive
You do not know the code for
the installer level
Operating and installation instructions sensoCOMFORT 0020288151_00
Measure
1. Change all the batteries. (→ Page 104)
2. If the fault persists, inform the competent person.
1. Inform the competent person.
2. Select the setting for limp home mode until the competent
person arrives.
3. You can find more detailed explanations under Faults, fault
messages and maintenance messages (→ Page 104).
1. Reset the boiler by first selecting Reset and then Yes.
2. If the fault message persists, inform the competent person.
1.
Press twice.
2.
Select the last menu item (
pressing .
3.
Under SETTINGS, select the second menu item and
confirm by pressing .
4. Select the language that you understand and confirm by
pressing .
Interval
See the operating instructions
for the heat generator
Measure
▶
Change all the batteries. (→ Page 104)
▶
Replace the product.
1. Take all the batteries out.
2. Insert the batteries in the battery compartment, making sure
that the poles are the right way round.
▶
Replace the product.
1. In the Room temp. mod.: function, set the value Active or
Expanded.
2. In the zone in which the system control is installed, assign
the system control's address in the Zone assignment: func-
tion.
▶
Reduce the set value in the Max. target flow temperature:°C
function.
▶
In the Circuit type: function, define the required function for
the heating circuit.
▶
Reset the system control to the factory setting. All set values
will be lost.
SETTINGS) and confirm by