Nibe VVM 500 - Page 16

Extra relay circuit board (AA7)
IndicationLED
A steady light means that the relevant
relay is engaged.
K1 - K3: Or-
ange
FunctionOutput
Shunt valve close (QN11)K1
Shunt valve open (QN11)K2
Reversing valve (QN35)K3
NIBE™ VVM 500Chapter 5 | Component description14