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16.3
DISPLAY DURING OPERATION
During normal operation, the text in the display shows the status of the water heater. In the following graphs, the displays during normal
operation are explained.
Display at WATER HEATER / HOT WATER DEMAND
Heat demand type:
W A
>
cascade
communica-
tion indicator
Explanation "Actual status" screen
Actual status:
B
When water heater is switched off (only text in the display during this status).
N
No heat demand signal coming from the room themostat and calorifier sensor (open).
S
Room themostat & calorifier sensor/themostat detect heat demand but set point is reached.
P
The fan is purging before a burner start attempt.
P
Ignition starts before opening of the gas valve.
I
The igniter is igniting.
P
The fan is purging after burner is switched off.
B
When the burner is firing, also the actual rpm% is shown.
Explanation "Cascade communication indicator"
NO CASCADE COMMUNICATION
>
Always showing the fixed ">>>"
CORRECT CASCADE COMMUNICATION
>
Showing alternating no.1 & no.2 with 1 second interval.
T
R
H
T
R
:
>
>
:
1
2
3
.
temp. set point water
temp.
o
i
l
e
r
o
o
d
e
m
a
n
t
a
n
d
-
b
y
r
e
-
p
u
r
g
r
e
-
i
g
n
i
g
n
i
t
i
o
n
o
s
t
-
p
u
r
u
r
n
i
n
g
>
> no.1
> no.1
no.2
>
Actual status:
S
T
A
N
D
-
B
4
°
C
(
1
2
3
measured temp.control.sens.
showing the measured temp.
Can be turned off by P5 BJ
f
f
d
e
t
i
o
n
g
e
1
0
0
%
Y
.
4
°
C
)
54
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