Viessmann WB2-44 - H Check WS Remote Control Unit (Accessory); H Check RS Remote Control (Accessory)

Troubleshooting
Resistance in
280
290
300
310
280
46
54 61 68 75 82
Setpoint value
12 20 24 2816
8
Ω
ºC
ºF
Resistance in
140
160
180
200
220
240
Actual value
8 1216202428
46
61
54 68 75 82
Ω
ºC
ºF
46 54 61 68 75
50 57
64 72 79
59
84
108
119
138
145
152
172
Resistance in
Setpoint value
812
10
26
16 20 24
14 18 22
Ω
ºC
ºF
44
Correction (continued)
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), a dd
the actual value and the current
resistance setpoint value.
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 t he stack effect of empty
pipes.
Wiring diagram: see section entitled
”Additional Information”.
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”
5285 961 v1.3
IMPORTANT