Nibe SMO 20 - The Control Module; Modules Core Function; Display Unit Overview

Component positions
LEK
L N 1 1 0 2 3 4PE
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
AA2
AA4-XJ3
X1
SF1
AA4
X2
AA7
AA4-XJ4
LEK
L N 1 1 0 2 3 4PE
AA2
X1
FA1
AA7
UB2UB1
PF3
Electrical components
Base cardAA2
Display unitAA4
AA4-XJ3 USB socket
AA4-XJ4 Service outlet (No function)
Extra relay circuit boardAA7
Miniature circuit breaker, 10 AFA1
Terminal block, incoming electrical supplyX1
Terminal block, control signal circulation pump,
sensors AUX inputs and heat pump
X2
SwitchSF1
Serial number platePF3
Cable grommet, incoming supply electricity, power
for accessories
UB1
Cable gland, signalUB2
Designations in component locations according to standard IEC 81346-
1 and EN 81346-2.
NIBE SMO 20Chapter 3 | The Control Module Design10
3 The Control Module Design