Viessmann VITODENS 200 Start-Up/Service Instructions page 39

Vitodens 200 WB2 Service
Correction
(continued)
WS remote control
s–Setpoint value between terminal "9" and "10"
m –Setpoint value between terminal "9" and "11"
RS remote control
Room temperature sensor (NTC) curve between
terminal "9" and "13"
RS remote control
s–Setpoint value between terminal "10" and "14"
m –Setpoint value between terminal "11" and "14"
Check WS remote control unit (Accessory)
Check RS remote control unit (Accessory)
The WS remote control unit is used for setting the desired
room temperature values from any room in the building.
The RS remote control unit is used for setting the desired
room temperature values from the main living room (with
room temperature dependent control).
Functionality check
Resistance measurement and control unit response test.
If the presence of a fault is suspected in the customer's
connecting cable, temporarily connect the remote control
directly to the control unit and perform test.
To calculate total resistance (NTC), add the actual value
and the current resistance setpoint value.
IMPORTANT
In most cases, faulty behavior of the control unit is due
to the installation of the RS remote control unit in an
unsuitable location.
This can lead to draft phenomena caused by cavities
behind the remote control or by the stack effect of empty
pipes.
Wiring diagram: see section entitled
"Additional Information".
Troubleshooting
39