Bedienungsanleitung Worcester-Bosch GB162 (Seite 9 von 12) (Englisch)

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Energy saving and environmental protection

6720814333 (2018/04) 9

7.2 A fault has occurred but no fault code is displayed

It is possible that even though a fault code is not displayed the boiler

does not operate according to your expectations. You should then check

the following:

Heating system does not heat up.

▶ Check in the information menu whether a fault code is displayed and

try to remedy the fault.

▶ Check the set boiler temperature in the setup menu.

▶ Check the settings of the heating controller by referring to its manual.

If the fault code still persists contact your installer.

▶ Note the fault code.

▶ State the appliance type and serial number. These are listed on the

right-hand side of the boiler.

Fig. 7 Right-hand side of the boiler

[1] Serial number

[2] Device type

8 Energy saving and environmental protection

8.1 Energy savings

Efficiency optimised

The boiler has been designed to keep gas consumption and

environmental pollution to a minimum and to maximise comfort.

The gas supply to the burner is controlled according to the heat demand

of the heating system.

The boiler operates with a “modulating control.” This control adjusts the

gas consumption in relation to the existing heat energy demand. The

modulating control reduces temperature fluctuations so the heat is

distributed evenly in the rooms.

The modulating control enables the boiler to still use less gas when

burning continuously than a boiler which is continuously being switched

on and off.

Underfloor heating system

▶ Never set the flow temperature higher than the maximum flow

temperature recommended by the installer.

Living space ventilation

Do not ventilate by leaving the windows slightly open. This draws heat

continuously from the room without significantly improving the quality of

the room air.

▶ Ventilate the room intermittently. Close the doors of the room to be

ventilated.

▶ Turn down the thermostatic valves of the radiator(s) in the room

when ventilating it.

8.2 Environment / disposal

Environmental protection is a fundamental corporate strategy of the

Bosch Group.

The quality of our products, their efficiency and environmental safety

are all of equal importance to us and all environmental protection

legislation and regulations are strictly observed.

We use the best possible technology and materials for protecting the

environment taking into account of cost-effectiveness.

Packaging

We participate in the recycling programmes of the countries in which our

products are sold to ensure optimum recycling.

All of our packaging materials are environmentally friendly and can be

recycled.

Old appliance

Old appliances contain recyclable materials.

The assemblies are easily separated and the types of plastic are clearly

marked. In this way the individual components can be easily sorted and

directed to recycling or disposal.

E 9 2 2 4 The temperature

measured by a

thermostat in the boiler

is too high.

• Check the water

pressure of the boiler

and top up if necessary.

• Check whether a

sufficient number of

radiator valves are open.

• Bleed radiators and vent

heating system.

• Reset the boiler.

E A 2 2 7 No burner ignition. • Check that the gas

isolator is open.

• Reset the boiler.

E 9 2 7 6 The temperature

measured by the

sensors in the boiler is

too high.

• Check the water

pressure of the boiler

and top up if necessary.

• Check whether a

sufficient number of

radiator valves are open.

• Bleed radiators and vent

heating system.

• Reset the boiler.

E 9 2 8 5

E F 3 4 5 The sensors inside the

boiler detected

unexpected

temperatures.

• Check whether a

sufficient number of

radiator valves are open.

• Bleed radiators and vent

heating system.

• Reset the boiler.

F d 2 3 1 The power was briefly

interrupted during a

fault.

• Reset the boiler.

H 0 7 The water pressure is

too low.

• Check the water

pressure of the boiler

and top up if necessary.

r E The boiler is reset.

Code Explanation Corrective measure

Table 6 Operating and fault codes

6720813683-2.1TD

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