Viessmann Vitoclima 300-S Service Instructions For Contractors page 44

Connection and wiring diagrams
External units
(cont.)
M Fuse, 20 A, 250 V~
N Terminals
* 1
O EMI filter PCB
P Electronic expansion valves
(EEV1 and EEV2)
R Communication PCB (MSMP)
S Fault message output
Colour coding to DIN IEC 60757
BK Black
BN Brown
BU Blue
*1
Filter for electromagnetic interferences.
44
T Night mode switch
U Standby mode switch
V 1 Suction gas temperature sensor
circuit A
2 Suction gas temperature sensor
circuit B
RD Red
WH White