Bosch 830 ES Manual

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Maintenance and service | 356 720 644 936 (2013/01)830 ES6.6 Operation▶ When a hot water tap is opened, main burner ignites and LCD displaysindication .Fig. 57▶ LCD flashes until selected temperature is reached.▶ Power bar indicates power percentage in use.6.7 Reset buttonIf the LCD shows the error symbol do not shut off power or unplugthe heater. Follow instructions below to reset error first.Record the error code on LCD and consult “Problem solving” chapter9.1, page 42.Fig. 58After following instructions indicated in “Troubleshooting” section,▶ press reset button firmly in order to return heater to normaloperation.Fig. 59 Reset buttonIf the problem persists, contact your installer.6.8 Program buttonFig. 60 “Program” key6.8.1 Memorizing selected temperature▶ Press buttons or to select desired temperature.▶ Hold “Program” button for 3 seconds to save temperature.When LCD stops blinking, temperature is saved in memory.Using “Program” functionIn order to select memorized temperature▶ Press “Program” key.LCD shows pre-memorized temperature, which is now the hot waterselected temperature.6.9 Locked conditionThis condition is only valid for appliances with one or more remotecontrols installed.Fig. 61 Locked conditionWhenever LCD shows , the temperature setting cannot beadjusted because the appliance is in use by a user which alreadyselected a different temperature. Appliance will be automatically unlock5 minutes after closing hot water tap.7 Maintenance and service7.1 Annual maintenance(To remove front cover, see page 8.)Venting System• Venting system - inspect inside of flue pipe for any blockage orrestriction. Observe burner flames during heater operation. (frontcover must be removed). Inspect the combustion air inlet pipe forblockage or debris. Inspect combustion air and exhaust terminationsfor blockage or debrisCombustion Chamber• Inspect burner observation window (Fig.71, #14) for cracks orspillage of flue gases. Observe burner flames during heater operation.Flames should be steady and blue with no signs of yellowing. Yellowburner flames are an indication of improper combustion. Refer to+DANGER:▶ Always shut off the electrical power supply, shut offthe manual gas valve and shut off the water valveswhenever servicing.NOTICE:▶ Inspect and clean the complete water heating systemonce a year.▶ Carry out a maintenance as necessary. Immediatelyrepair all faults to avoid damage to the system.Annual maintenance tableEvery year1. Inspect venting system X2. Inspect combustion chamber X3. Inspect burner X4. Inspect condensate trap X5. Inspect water filter XTable 34 Annual maintenance