9 Servicing
KPI-(252-2002)(E/X)4E - Energy recovery and active energy recovery ventilation units
SMGB0099 rev.0 - 12/2016
339
9
9.11.8 Removal of the electrical box
1 Unscrew the 2 screw from the service cover (c)
2 Unplug all connectors.
3 Disconnect the power supply and communication cables
from the terminal board
4 Loosen all four screws
5 Move the electrical box slightly upwards
6 Pull it out towards yourself
5
4
4
9.11.9 Removal of the PCB
1 Remove the electrical box
2 Disconnect all the connectors in the PCB.
3 Remove the PCB by unlocking the four (4) plastic 
holders (*) per PCB
(*)
! CAUTION
• Do not touch the electrical components of the PCB.
• Do not apply force to the PCB, as this could damage it.
• Pay special attention to the position of the connectors on the
PCB. An incorrect position during installation may damage
the PCB.
PCB
Holder Electrical box
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