11 Inspection and maintenance
40
Installation and maintenance instructions Hydraulic station 0020257319_02
10.8.1 Replace the safety cut-out
A
B
C
D
1
2
1.
Disconnect the product from the power grid and protect
it against being switched back on.
2.
Remove the front casing.
3.
Remove both screws
(1)
and remove the safety cut-out
with the retainer from the product.
4.
Remove all cables from the safety cut-out. Observe the
closing mechanism for the cable duct.
5.
Remove the safety cut-out from the retainer by undoing
the two screws
(2)
.
6.
Undo the nuts on the upper side of the back-up heater
and remove the temperature sensor.
7.
Connect cables of the same colour to opposite sides of
each other on the safety cut-out.
8.
Install the new safety cut-out in reverse order.
10.9
Preparing the repair work
1.
Switch off the product.
2.
Disconnect the product from the power supply.
3.
Secure the product against being switched back on
again.
4.
Remove the front casing.
5.
Close the service valves in the heating flow and in the
heating return.
6.
Close the service valve in the cold water pipe.
7.
Drain the product if you want to replace water-bearing
components of the product.
8.
Ensure that water does not drip on live components
(e.g. the electronics box).
9.
Use only new seals.
11 Inspection and maintenance
11.1
Inspection and maintenance information
11.1.1 Inspection
The inspection is intended to determine the actual condition
of a product and compare it with the target condition. This is
done by measuring, checking and observing.
11.1.2 Maintenance
Maintenance is required in order to eliminate any deviations
between the actual condition and the target condition. This is
normally done by cleaning, setting and, if necessary, repla-
cing individual components that are subject to wear.
11.2
Procuring spare parts
The original components of the product were also certified
by the manufacturer as part of the declaration of conformity.
If you use other, non-certified or unauthorised parts during
maintenance or repair work, this may void the conformity of
the product and it will therefore no longer comply with the
applicable standards.
We strongly recommend that you use original spare parts
from the manufacturer as this guarantees fault-free and safe
operation of the product. To receive information about the
available original spare parts, contact the contact address
provided on the back page of these instructions.
▶
If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the
product.
11.3
Checking maintenance messages
If the
symbol is shown in the display, the product requires
maintenance work or the product is in comfort protection
mode.
▶
To obtain further information, call up the
Live Monitor
.
▶
Carry out the maintenance work that is listed in the table.
Maintenance messages (
→
Page 52)
Condition
:
Lhm.XX
is displayed
The product is in Comfort protection mode. The product has
detected a permanent fault and continues to run with restric-
ted comfort.
▶
To determine which component is defective, read the
fault memory (
→
Page 39).
Note
If a fault message is present, the product re-
mains in comfort protection mode after it is
reset. After the product is reset, the fault mes-
sage is displayed first before the message
Limp home mode (comfort protection)
ap-
pears again.
▶
Check the component that is displayed and replace it.
