Dražice OKCE 100 S/2.2 kW, Operating And Installation Manual, Page: 21 / 23

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3.2 FUNCTIONAL DEFECTS
DEFECT CONTROL LIGHT FAILURE
Water in the tank is cold

is on

Heating element failure

Some elements are not
heating
Water in the tank is not
warm enough  is on

Failure of one of the
elements

Failure of one of the heating
coils in the element
Water in the tank is cold

is not on

Thermostat failure

The safety fuse turned off
electricity supply

Power supply outside the
heater discontinued
Water in the tank does
not correspond with
temperature set  is on

Thermostat failure
Table 11
Do not try to repair the failure yourselves. Seek either expert or service help. It does not take
much for an expert to remove the defect. When making a repair appointment, report the
type and serial number you find on the performance plate of your water heater.
4 IMPORTANT NOTICES
4.1 INSTALLATION REGULATIONS
Check and exchange the Mg anode regularly.
No stop valves can be put between the heater and the safety valve.
If the overpressure in the heater main exceeds 0.48 MPa, a reduction valve must be
mounted before the safety valve.
All outlets of hot water must be equipped with a combination faucet.
Before filling the heater with water for the first time, it is recommended to fasten the flange
connection nuts of the tank.