5 Troubleshooting
8Operating instructions Ray 0020264738_01
4.11 Guaranteeing the correct filling pressure of
the heating installation
4.11.1 Checking the filling pressure of the heating
installation
Note
The filling pressure must be between 0.1 MPa and
0.2 MPa (1.0 bar and 2.0 bar) when the heating
installation is cold in order for the heating installa-
tion to operate properly.
If the heating installation extends over several
storeys, a higher filling pressure may be required
for the heating installation. Ask a competent per-
son for details.
If the filling pressure of the heating installation
falls below 0.08 MPa (0.8 bar), the filling pres-
sure flashes in the display. If the filling pressure
falls below 0.03 MPa (0.3 bar), the product is
switched off. The fault message F.22 appears in
the display.
▶Check the filling pressure in the display.
Result 1:
Filling pressure: 0.1 to 0.2 MPa (1.0 to 2.0 bar)
The filling pressure is in the intended pressure range.
Result 2:
Filling pressure: < 0.08 MPa (< 0.80 bar)
▶Fill the heating installation. (→Page 8)
4.11.2 Filling the heating installation
Caution.
Risk of material damage due to heating
water that is extremely calciferous or cor-
rosive or contaminated by chemicals.
Unsuitable tap water damages the seals
and diaphragms, blocks components in the
product and heating installation through
which the water flows and causes noise.
▶Only fill the heating installation with suit-
able heating water.
1. Ask a competent person where the filling tap is located.
2. Connect the filling tap to a heating water supply in the
way you were told by the competent person.
3. Open all radiator valves (thermostatic valves) of the
heating installation.
4. Open the heating water supply.
5. Turn the filling tap on slowly and allow water to flow in
until the required filling pressure has been reached.
6. Close the heating water supply.
7. Purge all radiators.
8. Check the filling pressure in the display.
9. Top up with more water if necessary.
10. Close the filling tap.
4.12 Calling up status codes
1. Press and hold ( ) and ( ) at the same time for
three seconds.
◁The current operating mode S.XX is shown in the
display.
◁If the heating flow temperature and the required do-
mestic hot water temperature are set to low values,
the symbol appears in the display in each
case.
2. Press to return to the basic display.
4.13 Switching off the functions of the product
4.13.1 Switching off heating mode (Summer mode)
Condition: No control connected
▶Press until is no longer shown in the display.
Condition: Control connected
▶Switch off heating mode on the control (→Control oper-
ating instructions).
4.13.2 Switching off the domestic hot water mode
Condition: No control connected
▶Press until is no longer shown in the display.
Condition: Control connected
▶Switch off domestic hot water mode on the control (→
Control operating instructions).
5 Troubleshooting
5.1 Detecting and rectifying faults
Fault messages have priority over all other displays.
▶If faults occur or fault messages (F.xx) are displayed,
proceed as set out in the table in the appendix.
Detecting and eliminating faults (→Page 10)
▶If the product still does not function without problems
after the checks have been carried out using the table,
contact your competent person to rectify the problem.
6 Care and maintenance
6.1 Maintenance
An annual inspection and biennial maintenance of the
product carried out by a competent person is a prerequisite
for ensuring that the product is permanently ready and
safe for operation, reliable, and has a long service life. The
inspection may require maintenance to be carried out earlier,
depending on the results.
