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Worcester-Bosch Greenstar 8000 Style GR8700iW Manual

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Greenstar 8000 Style – 6720883871 (2021/05)
8.1 Troubleshooting (fault reset)
If there is fault in the system, there will be a message shown on the
display with an icon on the right up corner. The color of this icon depends
on the severity of the fault in the system. The cause of the fault is coded
(e.g. fault code 232) and displayed as text.
▶ Press the and keys until Reset is displayed.
The appliance starts up again and the current supply temperature is
displayed.
If a fault persists:
▶ Contact the contractor or the customer service.
▶ Provide them with the displayed fault code and the device data
(table 6).
8.2 Extreme cold weather
In certain instances where the condensate pipe work is run externally or
in an unheated area, such as a garage, the condensate pipe work can be
at risk of freezing, even if well insulated.
A frozen/blocked condensate pipe will cause the boiler to shut down.
Worcester, Bosch Group have available helpful videos on thawing frozen
condensate pipe work on our website in the Customer service section.
WARNING
Falling hazard!
Failure to follow this guidance may result in personal injury.
▶ Only attempt to thaw a condensate pipe that is at ground level and
easily accessible.
▶ Never attempt to thaw a condensate pipe that is at height.
CAUTION
Risk of damage to pipe work!
Thermal shock from boiling water can damage plastic pipes.
▶DO NOT use boiling water to thaw the condensate pipe!
CAUTION
Slip hazard
▶ Ensure that the subsequent freezing of any water does not result in a
slip hazard.
If the condensate pipe has frozen:
▶ Locate the blockage.
– It is likely that the pipe is frozen at the most exposed point outside
the building or where there is an obstruction to flow. This could be
the open end of the pipe, at a bend or elbow, or where there is a
sag in the pipe in which condensate can collect.
– The location of the blockage should be identified as closely as
possible before taking further action.
▶ Thaw the frozen pipe.
– The pipe can be thawed by applying a hot water bottle, a
microwaveable heating pack (the sort used for muscular aches
and pains) or a cloth soaked in hot water to the exterior of the
pipe, close to the point of blockage.
– Hot water, but not boiling, can also be poured onto the pipe from
a watering can or similar container.
– Care must be taken at pedestrian areas where this water may
freeze and create a slip hazard.
▶ Worcester, Bosch Group have available on our website helpful videos
in the Customer service section to aid in thawing a frozen pipe.
▶ Reset the appliance and wait two or three minutes for the appliance
to restart.
▶ Contact Worcester, Bosch Group Appointments Team on:
0330 123 9339, if the boiler does not restart.
▶ Contact your installer in order to find a permanent solution to the
problem.
8.3 System gassing troubleshooting
WARNING
Caution must be exercised when venting radiators or adjusting
system pressure after commissioning of your boiler.
Do not repeatedly vent your radiators, if symptoms persist, contact a
heating engineer.
▶ Do not vent air from radiators whilst the central heating is switched
on; turn your boiler off.
▶ Whilst venting radiators, do not allow the pressure on the boiler to
drop below the pressure at which it is normally set.
CAUTION
If the pressure in your heating system is repeatedly rising (this can
be checked via the boilers pressure gauge or digital display and
should be checked when the system is cold), and especially if you
need to keep venting the radiators, urgent action is required and you
must contact a heating engineer. This can indicate that there is
corrosion occurring within the heating system
Note: Ensure the reading stays between minimum and maximum
operating pressures at all times whilst the boiler is operating
▶ This must be properly addressed to prevent serious damage to the
entire system.
▶ Failure to properly maintain the heating system may affect your
warranty.
… 13 …


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