Vaillant V 12-025 HWI Training Manual page 19

Fig. 6.2.2 wiring circuit diagram for multi outdoor unit
RD Red
BK Black
BL Blue
PR Purple
OR Orange
Table 6.2.1 wire color code.
COMP Compressor
YV Four way valve
TR Transformer
FM Out-warm fan motor
CNB Transformer primary
CNC Transformer secondary
Table 6.2.2 component code.
Split Type Installation Manual
GY Grey
GN Green
WH White
YE Yellow
BR Brown
Duct-T Duct temperature
sensing device
COMP-
Compressor delay
Delay
LED Indicator light
TR Transformer
CP Capacitance
Wiring Circuit Diagram 6
EN 19