Circuit board
Control board (PWB1)
The outdoor unit program is here.
All inputs and outputs for the machine’s control func-
tions are connected here.
PWB1 8kW (upper side)
CPU
LED 2 (red)
LED 1 (green)
Lit = Normal condition, supply ok.LED 1 (green)
Flashes = Alarm indicationLED 2 (red)
PWB1 8kW (underside)
Only flashes during software pro-
gramming.
LED 3 (green)
NIBE™ F2040Chapter 5 | Component description34
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