Viessmann VITOTRONIC 200 Service Instructions Manual page 152

PCBs and connection options
Main and extension PCB
Information regarding the connection
values
■ The output given is the recommended
connected load.
■ The stated current indicates the max.
switching current of the switching con-
tact (observe the total current for all
connected components of 5 A).
Plug fÖ
Terminals Function
Internal power supply of the
PCBs.
Plug sYÖ
Terminals Function
210.1
/
End of the safety chain.
210.2
/
Compressor control stage 1
direct or via EEV controller
(refrigerant circuit control).
152
(cont.)
:
:
Explanation
Factory connection.
Explanation
'Live' in case of fault-free safety chain.
Factory connection
■ Heat demand: Contact closed, 210.2
is 'live'.
■ If the compressor will not start, check
whether it has been enabled by the
EEV controller (own relay on EEV
PCB).