14 (15)
EN.33.C.94.1702
Troubleshooting
Measures requiring tools should be carried out by a qualified installer. Begin troubleshooting by viewing
the status indicators, see item 10, and
Control panel
.
Fault
Possible cause
Remedial messure
Operation and status
indicator not illumina-
ted, no heat.
Electric boiler without power.
Check main fuses.
Main switch turned off.
Turn main switch to position 1. Connection delay switches off
output if boiler without power longer than 3 minutes.
Operation indicator
illuminated and status
indicator not illumina-
ted, no heat.
Selector switch in position:
Select an operation mode.
Low initial value.
Initial value below 15 °C, i.e. no need for heating.
Thermostat valve / valves in radiator
system or room thermostat of floor-
based heating system set for low
temperature.
Set thermostat valve / valve or room thermostat to desired
temperature.
Operation and status
indicator illuminated,
no heat or not enough
heat.
Incorrectly set regulators.
Check selections regarding heating graph, transition heating
graph, maximum temperature and night-time temperature
drop. Check selector setting.
Overheating (maximum safe tempe-
rature) protection function has been
triggered.
If overheating (maximum safe temperature) protection
function has been triggered, check functioning of circulation
pump and valves. Reset by pressing overheating (maximum
safe temperature) protection button down after temperature
has dropped below 80 °C.
Electric boiler fun-
ctions normally, but not
enough heat.
Counter-pressure in heating system
has exceeded overflow valve’s ope-
ning pressure.
Check heating system’s counter-pressure. Contact plumber.
Electric boiler’s group
fuses blown.
Electric cartridge damaged.
Check electric cartridge’s isolation. If electric cartridge has to
be replaced, it is important to separate the loops in order to
avoid sound of boiling alarm.
Water leaks out from
air-bleeder.
Impurities in air-bleeder or broken
air-bleeder.
Replace or clean air-bleeder.
Resistance values of boiler’s temperature sensor
NOTE!
The sensor must not be connected to the circuit
board while readings are taken.
Boiler/Outgoing water temperature sensor
0 ºC
R(Ω)
0 ºC
R(Ω)
0
32,7 k
50
3,6 k
5
25,4 k
55
3,0 k
10
19,9 k
60
2,5 k
15
15,7 k
65
2,1 k
20
12,5 k
70
1,8 k
25
10,0 k
75
1,5 k
30
8,1 k
80
1,3 k
35
6,5 k
85
1,1 k
40
5,3 k
90
915
45
4,4 k
95
787
Outside temperature sensor
0 ºC
R(Ω)
0 ºC
R(Ω)
-35
64,2
±0
8,0
-30
47,0
5
6,8
-25
34,7
10
5,3
-20
25,9
15
4,2
-15
19,5
20
3,4
-10
14,8
25
2,7
-5
11,4
30
2,2
Assembly instructions | LK Electric Boiler 11-n
