41
Troubleshooting
Repairs
(cont.)
Relay test
(standard programming unit)
1.
Set the heating program selector
switch to "
T
".
2.
Select the required position using
rotary selectorĂ"
s
".
Function
Rotary
selectorĂ"
s
"
Flashing display
ThreeĆway valve drive (DHW cylinder)
N
U
:0:ă4
Heating circuit pumpĂA
ć1
U
:0:ă2
Heating circuit pump with extension kit
for a heating circuit with mixer
ć2
U
:0:ă3
Mixer open
+1
U
:0:ă8
Mixer closed
+2
U
:0:ă7
DHW circulation pump
ć4
U
:0:ăd
No function
ć3
U
:0:ă1
Burner start with lower rated output
and heating circuit pump ON
ć5
Display of boiler
water temperature
Burner start with upper rated output
and heating circuit pump ON
ć6
Fault code display
from the fault
memory
(see pageĂ26)
3.
Return the heating program
selector and rotary selectorĂ"
s
"
to their original positions.
5692Ă485
G
B
T
N
+5
-7 +8
-4
Содержание Vitodens 200
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