Bedienungsanleitung Worcester-Bosch GB162 (Seite 8 von 12) (Englisch)

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Inspection and servicing

6720814333 (2018/04)8

5 Inspection and servicing

The user is responsible for ensuring the general safety and annual

servicing of the heating system.

Recommendations:

▶ To ensure the boiler functions correctly, maintenance should be

carried out annually by a certified installer.

▶ To do this, organise a maintenance and inspection contract.

5.1 Refilling the heating system

Every heating system is refilled with heating water in different ways,

depending on the water quality.

▶ You should therefore ask the installer to explain the refilling process

to you at system handover.

▶ If persistent refilling is required then please contact a qualified

contractor, it is likely that a leak exists

5.2 Cleaning the casing

▶ Only clean the casing of the boiler with a damp cloth and possibly a

mild detergent.

6Shutdown

6.1 Standard shutdown

▶ Put on/off switch in position “0”.

▶ Close the gas isolation valve under the boiler ( figure 2).

6.2 Shutting down when there is a risk of frost

If the boiler stays on:

▶ Set the pump over-run time to 24 hours (Chapter 4.2).

▶ Make sure that sufficient flow to all radiators is possible.

If the boiler is switched off:

▶ Put on/off switch in position “0”.

▶ Close the gas isolation valve under the boiler.

▶ Drain the entire heating system.

7 Display information

7.1 Display codes

A display code provides information about the status of the boiler. Fault

codes are either shown in the display directly or can be called up via the

information menu. Proceed as follows:

▶ Navigate the menu to the fault code level. Press L and toggle with

M and N.

▶ Identify the fault code and search for the corresponding explanation

(table 6).

▶ Implement the solution to eliminate the fault.

There are 3 types of code:

• normal operating code

• blocking fault code

• interlocking fault code

For safety reasons, the boiler shuts down and locks as soon as a fault

occurs. This is indicated by an illuminated fault code. The boiler must be

reset in order to unlock it. Proceed as follows:

▶Hold

c pressed down until “rE ” appears in the display.

In most cases, the boiler will work again normally following the reset.

If the fault code still persists contact your installer, stating the appliance

type and fault code. Alternatively please contact Worcester Technical

Support (contact details on the back cover of this guide).

Code Explanation Corrective measure

- - 2 0 0 The boiler is in heating

mode.

- - 2 0 1 The boiler is in DHW

mode.

- - 2 0 2 The boiler cannot

transfer the heat to the

heating system.

•Check whether a

sufficient number of

radiator valves are open.

•Bleed radiators/

heating system.

• Reset the boiler.

- - 2 0 3 The boiler is in standby

mode, there is no heat

demand.

- - 2 0 4 The boiler cannot

transfer the heat to the

heating system.

- - 2 1 2 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.

- - 2 6 0

- - 2 6 5 The boiler is waiting.

The boiler duly switches

on in order to satisfy the

heat demand.

- - 2 7 0 The boiler starts.

- - 2 8 3

- - 2 8 4

C E 2 0 7 The water pressure is

too low.

• Check the water

pressure of the boiler

and top up if necessary.

• Reset the boiler.

C E 2 6 6 The sensors inside the

boiler detected

unexpected

temperatures.

• 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.

d 4 2 1 3 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.

d 4 3 4 1

E 9 2 1 9 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.

E 9 2 2 0

Table 6 Operating and fault codes

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