4 - EN
5
Maintenance procedures ............................................................................................................................................. 26
5.1 Procedure for opening the unit ............................................................................................................................. 26
5.2 Maintenance of the casing ................................................................................................................................... 27
5.3 Maintenance of the heat exchanger ..................................................................................................................... 27
5.4 Maintenance of the fans ....................................................................................................................................... 28
5.5 Maintenance of the modulating bypass valves ....................................................................................................... 29
5.6 Maintenance of the pre-heater .............................................................................................................................. 29
5.7 Maintenance of the condensation drain ................................................................................................................. 30
5.8 Maintenance of the air ducts ................................................................................................................................ 30
5.9 Procedure for ending the maintenance .................................................................................................................. 31
6. Malfunction procedures .............................................................................................................................................. 32
6.1 How to reset errors .............................................................................................................................................. 32
6.2 How to remove ancillaries..................................................................................................................................... 32
6.3 Malfunction alerts on the display of the unit
1 .............................................................................................................................................. 33
6.3 How to gain access to the ComfoNet connectors on the unit .................................................................................. 34
6.4 How to gain access to the main board .................................................................................................................. 34
6.5 How to gain access to the main power fuse of the unit .......................................................................................... 34
6.6 How to gain access to the top-section sensor ....................................................................................................... 35
6.7 How to gain access to the mid-section sensor ....................................................................................................... 35
6.8 How to remove the modulating bypass valve ......................................................................................................... 36
6.9 How to change the location of the pre-heater ........................................................................................................ 36
6.10 What to do in the event of a malfunction alert (troubleshooting) ............................................................................... 37
6.11 What to do in the event of a malfunction (or problem) without a malfunction alert (troubleshooting) ............................ 44
