Boards
Main Board A2 and I/O A4
A2 board, explanation of the statuses
of the different LEDs Fig. A
●LED 1 (green)
Indicates power is present.
●LED 2 (green)
Indicates 18 VAC is present
●LED 3 (green)
Indicates processor power is present.
●LED 4 (Orange)
Indicates that the processor is in «Reset».
A4 board, explanation of the statuses
of the different LEDs Fig. B
●LED 1 (green)
Indicates 11.5 VAC is present
●LED 4 (Orange)
Indicates a transmission problem on the bus
(towards the A2 board). Attention This LED also
ashesduringbootingprocess.Itstopsblinking
once the main screen is displayed.
v03 • July-2016 • Hen
VI.16
Control Module
Line Units Serial number (starting from) Sw Revision
VCCM
VCCWE
All ExxVH1009xxxxxxx
A
B