23
- While holding both keys pressed, set the
t
-display to
12
, using the [
+
] or [
-
]-
keys and press the ‘
e
’-key.
- The display will flash twice confirming acceptance of the access code.
- Release the keys and
c12
will dissappear from the display. You are now in the
service mode
WARNING:
changing factory defaults without reference to the tables contained in this
manual may result in incorrect operation.
- To delete the service code press the ‘
reset’
-key once
- If no keys are pressed over a 15 minute period the service code will delete automa-
tically
Code Description
Setting range
Preset
Q30
$
Flow temperature set point during
forced part load
20
-
90
ºC
80
%
High limit temperature set point
90
–
!0
(= 110°C)
)0
(=100)*
^
Fan speed at full load (HTG)
10
–
60
hundreds
48
&
Fan speed at part load (HTG and
DHW)
10
–
60
hundreds
12
*
Modulation start point
Δ
T (F/R)
05
-
30
ºC
25
(
Interface selection (control option)
00
internal (Chronotherm
control only)
01
01
external interface
B
DHW cut-in
Δ
T
10
–
05
read 1 - 5 °C
06
read 10 °C
07
read 15 °C
08
read 20 °C
05
C
Fan speed at full load (DHW)
10
–
60
hundreds
48
D
Intern
May not be changed!
00
E
N/a
)0
(=100)*
F
N/a
25
G
Forced part load time after start
(HTG)
00
–
15
minutes
03
H
Fan speed at start
May not be changed!
25
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