Error - Overheating, Emergency Thermostat - Tetan KP 12S Service And Operation Manual

Error states

9.4 ERROR - OVERHEATING, EMERGENCY THERMOSTAT

The control unit is equipped with emergency circuit in case of overheating of the boiler. OVERHEATING fault
condition occurs when the water temperature at the outlet exceeds a threshold of 95 ° C. In this situation, the
emergency circuit is activated by the control unit and the boiler is shut down.
This is indicated by the lighting up of this red box:
Only circulating pump is put into operation for heat dissipation of the heat exchanger.
Under normal circumstances, there is no overheating of the boiler, so this condition is considered an emergency.
It requires operator intervention (service), which must evaluate why this situation occurred.
Possible causes
The boiler water temperature is
set to a high value
(around 90 ° C)
Insufficient heat dissipation from
the boiler
- circulation pump not running
- blocked cleaning strainer
- wrong hydraulice of heating
circuit (all thermoheads
closed)
Too short Stand - by time of the
boiler without electric ignition
Larger amount of unburned
pellets in the combustion
chamber
Automatic boiler for wood pellets
Elimination
Reduce output water temperature (Menu 2) to f.e.
80 ° C.
Control of the circulation pump, or switching to
higher power.
Close the valves and clean the strainer.
Check the temperature during Stand – by mode and
set a longer period of time
ExtendStand – by parameter (in the Menu Service)
Carefully clean the burner chamber and
professionally set the combustion.
63
Performed by
user
user
installer
installer
service
service