2009 by ELTRA GmbH Germany – July 2009 – Service Manual Thermostep
Page 39
b.)
Remove carefully all cables out of their plugs at the backside of the board.
Fig. 3.5.2: RHS – Plugs at the backside of main board
c.)
Remove the 2 x 3 mm allen screws from the fittings of the board.
Fig. 3.5.3: RHS – Exchange of mainboard
d.)
Remove the board and note its orientation.
e.)
Replace the new board at the fittings and fasten it with the the 2 x 3 mm screws.
Remind its orientation!
f.)
Plug in all cables at the backside of the board and fasten it with the screws if possible.
g.)
Raise up the board and fix it again at the upper left edge.
3.6
Change of internal blower
Required tools:
3 mm allen key
a.)
Lift the internal blower out of its well manually and put it on the lower metal sheet at
the furnace.
