Viessmann HMU Notice De Montage page 9

Replacing the HMU electronics module
5.
3.
1.
01. Unclip the enclosure and pivot it
forwards.
02. Undo the side release clips (red).
03. Pivot the wiring chamber cover
backwards and out of the enclo-
sure.
04. Disconnect all plugs from the HMU
electronics module. Release the
strain relief fittings.
Remove the ON/OFF switch or the
ON/OFF switch fascia.
30°
05. Pivot the enclosure upwards by
06. Unclip the enclosure at the hinges
07. Install new HMU electronics mod-
08. Connect all plugs to the HMU elec-
6.
2.
4.
30°.
and remove it.
ule.
tronics module. Fasten the strain
relief fittings.
Refit the ON/OFF switch or the
ON/OFF switch fascia.
GB
2x
9