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10 Troubleshooting
10.9.6 Replace the pressure sensor
2
1
1.
Pull out the plug for the pressure sensor.
2.
Remove the fastening clip (1).
3.
Remove the defective pressure sensor (2).
4.
Replace the pressure sensor.
5.
Fill and purge the product and, if necessary, the heating
installation.
10.9.7 Replacing the heating flow and return
temperature sensor
Applicability: VC 406/5-5 (E-DE)
OR VC 406/5-5 (LL-DE)
OR VC 476/5-5 (E-DE)
OR VC 476/5-5 (LL-DE)
1
4
▶
Pull out the heating flow (4) and return temperature
sensor (3).
Applicability: VC 636/5-5 (E-DE)
OR VC 636/5-5 (LL-DE)
1
4
▶
Pull out the heating flow (4) and return temperature
sensor (3).
1.
Remove the heating flow (1) and return plug (2).
32
2
3
2
3
2.
Install the new temperature sensor.
3.
When reinstalling, note the colour of the conductors.
–
Blue conductor: Heating return
–
Red conductor: Heating flow
10.9.8 Replacing the pump
2
1
4
1.
Pull out the plug (5) for the pump.
2.
Remove the clip (1) from the pipe (2).
3.
Detach the connection (3) from below the pump.
4.
Remove the defective pump (4).
5.
Detach the connection (5) from the pump.
6.
Replace the seals.
7.
Install the new pump. To do this, proceed in reverse
order.
10.9.9 Replace the main PCB and/or the control
element's PCB
Caution.
Risk of material damage caused by incor-
rect repairs.
Using an incorrect PCB may lead to damage
to the electronics.
▶
Before replacing, check that the correct
PCB is available.
▶
Never use a different PCB when replacing
it.
If you are replacing only one component, the set parameters
are transferred automatically. When the product is switched
on, the new component adopts the previously set paramet-
ers from the unreplaced component.
Installation and maintenance instructions ecoTEC plus 0020261188_00
3
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