Replacing The Control Board - Defensor H15A Service Manual

4.3

Replacing the control board

Scope of delivery control board
Control board PH15/PH15A (Art.-No.: 2525304)
Control board PH27/PH27A (Art.-No.: 2532888)
Control board PH28/PH28A (Art.-No.: 2560896)
1. Set unit out of operation and disconnect it from the mains (unplug mains cable).
2. PH15/PH15A and PH27/PH27A: Remove air inlet lattice (PH15/PH15A) / air outlet lattice (PH27/
PH27A). Then, undo the 4 screws (Torx 15) of the cover of the electronic compartment and care-
fully flap the cover to the side.
PH28/PH28A: Remove the three air outlet grills. Then, undo the two Phillips screws of the cover
of the electronic compartment and carefully flap the cover upwards.
Attention! The electronic components on the control board are very susceptible to electrostatic
discharges. For the protection of these components, measures must be taken for all work on the
control board to prevent damage caused by electrostatic discharge (ESD–protection).
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