Siemens SIPLUS HCS Operating Instructions Manual page 114

Service and maintenance
12.4 Replace fan
Procedure for installing the new fan
4
Re-insert the four plastic rivets of the fan grille
- Insert sleeve
- Push in pin
5
Plug in 24 V DC connector of the new fan
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Operating Instructions, 11/2015, A5E35452705A/002
SIPLUS HCS4300