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Please check whether you can remedy the fault yourself by using the following guidelines. You will save yourself the costs of an unnecessary visit by customer service personnel. Fault Cause Solution Who Water flow-rate is too low. The filter in either the water tap or the showerhead is clogged. Remove the filter and either clean it or descale it. Customer The filter in the corner regulating valve is clogged. Get a servicing expert to clean the filter. Servicing expert The filter upstream from the check valve in the cold water supply inlet is clogged. Remove the filter and either clean it or descale it. Servicing expert The desired water temperature is set, but it is not reached. The continuous-flow heater is connected to a thermostatically- controlled water faucet. Set the temperature on the continuous- flow heater to “60 °C”. Customer The display is blank The fuse in the house electrical installation has triggered/blown. Check the fuse in the house electrical installation. Customer The appliance's automatic circuit breaker has been tripped. Get the appliance's automatic circuit breaker checked by an electrician. Servicing expert The water is not warm. The fuse in the house electrical installation has tripped/blown. Check the fuse in the house electrical installation. Customer From time to time, cold water flows out. The air sensor in the appliance detects air in the water and momentarily switches the heating element off. After a few seconds, the continuous- flow heater automatically goes back into operation. Continuous- flow heater automatically resolves problem The set temperature, for instance 41.0 °C flashes. The temperature of the water leaving the tap is higher than the set temperature. The temperature of the water supplying the continuous-flow heater is higher than the set temperature (e. g. due to pre-warmed water supplied from a solar water heater). The thermostatic premixer in the domestic supply must be set accordingly to lower temperatures. Customer Winter operation:The desired water temperature leaving the tap is no longer reached. The supply temperature has reduced. Reduce the water flow on the taps until the desired water temperature is reached. Customer E02 No thermostatic premixer available The supply temperature to the continuous-flow heater is higher than 55 °C (e. g. due to pre-warmed water supplied from a solar water heater). Install a thermostatic premixer in the domestic supply. Customer The supply temperature to the continuous-flow heater is higher than 55 °C (e. g. due to pre-warmed water supplied from a solar water heater). The thermostatic premixer in the domestic supply must be set accordingly to lower temperatures. E03–E04 Temperature sensor defective Please contact customer service. Customer Service E05–E07 Electronic malfunction Please contact customer service. Customer Service E08 Frost damage The water supply sensor measures a temperature on . 0 °C. The appliance is defective! Switch off the water supply immediate...
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