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EN.33.C.111.1804
Assembly instructions | LK Electric Boiler - 4,5
Troubleshooting
Intervention in the boiler which requires the use of tools should be carried out by an authorized electrician.
Begin all troubleshooting tasks by looking at the status indicators, see the
Control panel
section.
Error
Possible cause
Measures
On/off indication
is off, there is no
heat in the heating
system.
The electric boiler is currentless.
Check the fuses.
Circuits switched off.
Check that the main and control switches are on.
The electric boiler is blocked externally.
Check if the boiler is blocked by external switching/room ther-
mostat.
Alarm light is on.
Overheating (maximum safe temperature)
protection is triggered.
If the overheating (maximum safe temperature) protection goes
off, the function should be controlled at the circulation pump and
valves. During resetting the button on the overheating (maxi-
mum safe temperature) protection is pushed in when the boiler
temperature falls below 65°C (push the button hard for reset).
No or insufficient
heat.
Thermostatic valves on the heating system or
boiler thermostat set at too low temperature.
Inspect and adjust.
Faulty adjustment of bypass valve.
Inspect and adjust.
Group fuses for
boiler are triggered.
The electric cartridge is broken.
Inspect the electric cartridge by testing it in isolation. Measure
between the outward side on the contacts, and earth.
Inform the installer!
Intervention in the boiler, which requires the use of tools, must only be carried out under the supervision
of an authorized installer!
Drawings
9
14
10
6
5
7
1
11
8
12
3
2
4
2
13
1. Cable bushes
2. Automatic bleeding valve
3. Expansion vessel
4. Sensor clip, thermometer bulb
5. Boiler vessel of stainless
steel with electric cartridge,
insulated
6. Circulation pump
7. Electric-shock protection over
electric cartridge cable con-
nections
8. Bypass with shut-off valves
9. Flow pipe, ¾” male thread
10. Return connection, ¾” male
thread
11. Collection vessel, waster
water from safety valve
12. Safety valve
13. Electric-shock protection
14. Knockouts for cables, where
these come from the wall
