11 Replacing components
28
Installation and maintenance instructions geoTHERM 0020250180_00
Menu
→
Installer level
→
Start inst. assistant
10.1.6 Using check programmes
Menu
→
Installer level
→
Test menu
→
Check pro-
grammes
You can use this function to start check programmes.
Note
If the heat pump is in a fault state, you cannot
start the check programmes.
You can press the left-hand selection button (
Cancel
) at any
time to end the check programmes.
11 Replacing components
11.1
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 reverse of these instructions.
▶
If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the
product.
11.1.1 Preparing for replacement work
Danger!
Risk of death from electric shock!
Power supply terminals L and N remain live
even if the heat pump is switched off.
▶
Isolate the heat pump from the power grid
by pulling out the mains plug.
1.
Decommission the heat pump.
Note
When carrying out any repair work on the
heat pump, make sure that you observe the
following instructions for your own safety and
to avoid material damage to the heat pump.
2.
Disconnect the heat pump from the power grid.
3.
Remove the front casing as shown in the illustration.
(
→
Page 14)
4.
Remove the side casing. (
→
Page 14)
5.
Close the service valves in the heating flow and in the
heating return.
6.
Drain the heat pump if you want to replace water-carry-
ing components in the heat pump.
7.
Ensure that water does not drip on live components
(e.g. the electronics box).
8.
Use only new seals and O-rings.
11.1.2 Completing the replacement work
1.
Attach the casing. (
→
Page 22)
2.
Attach the front casing. (
→
Page 23)
11.1.3 Replacing the PCB and/or the display
Danger!
Risk of death from electric shock!
Power supply terminals L and N remain live
even if the heat pump is switched off.
▶
Isolate the heat pump from the power grid
by pulling out the mains plug.
Caution.
Risk of damage caused by incorrect repair
work.
Using an incorrect replacement display may
cause damage to the electronics.
▶
Before replacing, check that the correct
replacement display is available.
▶
Never use another replacement display.
▶
Comply with the assembly and installation instructions
provided with the spare parts.
11.1.3.1 Replacing either the PCB or the display
1.
Replace the PCB or display according to the assembly
and installation instructions supplied.
◁
If you are replacing only one of the two compon-
ents (PCB or display), the parameterization func-
tions automatically. When the product is switched
on, the new component adopts the previously set
parameters from the unreplaced component.
2.
Plug the plug into the new PCB.
–
When replacing the PCB
Note
Coding resistors are integrated into the plugs
and these enable the unit type to be detec-
ted.
