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Worcester-Bosch GB162 Manual

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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
… 8 …


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