Technical data

47
8.6 Reduced output
8.7 CH does not reach the correct temperature
Table 6. NTC resistances
NTC 12
kOhm
/ 25°C
T [
°C]
R[ohm]
T [°C]
R[ohm]
T [°C]
R[ohm]
-
15
76020
25
12000
65
2752
-
10
58880
30
9805
70
2337
-
5
45950
35
8055
75
1994
0
36130
40
6653
80
1707
5
28600
45
5522
85
1467
10
22800
50
4609
90
1266
15
18300
55
3863
95
1096
20
14770
60
3253
100
952
1. Check appliance and flue system
for pollution.
2. Clean appliance and flue system.
At high speed, the power has decreased
by not more than 5%.
Yes
Possible causes Remedies
1. Check the setting and adjust if
necessary: set to 0.1 A.
Room thermostat settings not correct.
1. Raise the pump setting or replace
the pump.
1. Check for circulation: at least 2 or 3
radiators must be open.
1. Adjust the power,
see Setting maximum CH power.
1. Descale or flush the heat exchanger
on the CH side.
No heat transfer due to scaling or pollution
in the heat exchanger.
Yes
The boiler power is not set well
for the system.
Yes
No
No
No circulation in the system.
Yes
Pump does not run well.
Pump setting too low.
Yes
No
No
Yes
1. Raise the CH temperature,
see CH operation.
2. Check the outside sensor for
short circuit: remedy this..
Temperature set too low.
Yes
No
Possible causes Remedies