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5.2
Maintenance
Applicability: Except Great Britain
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.
Applicability: Great Britain
An annual inspection of the product carried out by a compet-
ent person is a prerequisite for ensuring that the product is
permanently ready and safe for operation, reliable, and has a
long working life.
5.3
Reading maintenance messages
If the
symbol is shown in the display, the product requires
maintenance work or the product is in restricted mode (com-
fort protection). The product is not in fault mode; it continues
to operate.
▶
Consult a competent person.
Condition: Lhm. 37 is displayed
The product is in Comfort protection mode. The product has
detected a permanent fault and continues to run with restric-
ted comfort.
5.4
Checking the system pressure
1.
Check the filling pressure of the heating installation
every day for a week after initial start-up and mainten-
ance work, and then twice a year.
–
Min. heating circuit operating pressure: ≥ 0.07 MPa
(≥ 0.70 bar)
2.
If the filling pressure is too low, inform your competent
person so that they can refill the heating water.
6
Troubleshooting
6.1
Reading fault messages
Fault messages have priority over all other displays and are
shown on the display instead of the basic display. If several
faults occur at the same time, these are displayed alternately
for two seconds each.
Depending on the type of fault, the system can work in limp
home mode in order to maintain the heating mode or do-
mestic hot water generation.
F.723 Building circuit: Pressure too low
If the filling pressure falls below the minimum pressure, the
heat pump will be switched off automatically.
▶
Inform your competent person so that he can top up the
heating water.
F.1120 Heating rod: Phase failure
If the electric back-up heater is defective, the anti-legionella
function is not guaranteed.
▶
Inform your competent person so that they can rectify the
fault and reset the internal circuit breaker.
0020257319_02 Hydraulic station Operating instructions
6.2
Detecting and eliminating faults
▶
If problems occur whilst operating the product, you can
carry out certain checks with the aid of the table.
Troubleshooting (→ Page 11)
▶
If the product is not functioning correctly, even though
you have checked the points listed in the table, contact a
competent person.
7
Decommissioning
7.1
Temporarily decommissioning the product
▶
Use the partition that is installed on-site (e.g. fuses
or power switches) to disconnect the product from the
power supply.
7.2
Permanently decommissioning the product
▶
Have a competent person permanently decommission
and dispose of the product.
8
Recycling and disposal
▶
The competent person who installed your product is re-
sponsible for the disposal of the packaging.
If the product is labelled with this mark:
▶
In this case, do not dispose of the product with the
household waste.
▶
Instead, hand in the product to a collection centre for
waste electrical or electronic equipment.
If the product contains batteries that are labelled with
this mark, these batteries may contain substances that are
hazardous to human health and the environment.
▶
In this case, dispose of the batteries at a collection point
for batteries.
8.1
Disposing of the product and the
accessories
Do not dispose of the product or the accessories with house-
hold waste.
▶
Ensure that the product and all accessories are disposed
of properly.
▶
Observe all valid regulations.
Troubleshooting 6
9
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