Troubleshooting; Extreme Cold Weather; Fault 2980 - Worcester Greenstar 1000 User Instructions

Malfunction or failure
No appliance fault is found on over 30% of all service calls.
▶ In the case of a suspected fault, refer to the basic checks earlier in this
section.
In the event of an appliance fault or breakdown please contact
Worcester, Bosch Group appointments team on 0330 123 9339. Your
advisor will arrange for an engineer to call with the minimum of delay;
under normal circumstances this will be from 1‒3 working days
(excluding weekends and bank holidays) for priority breakdown
situations (no hot water and/or heating).
7.1

Troubleshooting

The H symbol indicates that a fault has occurred. The cause of the fault
is displayed in code (e.g. fault code 214).
Fig. 10 Example of a fault code
Some faults lead to a shutdown of the appliance, which only starts again
after a reset:
▶ Press the  and  arrows simultaneously, until the symbols H and
! are no longer be displayed.
The appliance starts up again. The flow temperature is displayed.
If a fault cannot be eliminated:
▶ Contact an Installer/Service Engineer or Worcester, Bosch Group
appointments team on 0330 123 9339.
▶ You will need to provide them with the displayed fault code and the
following appliance data.
– Appliance type and serial number.
– Commissioning date.
7.2

Extreme cold weather

In certain instances where the condensate pipework is run externally or
in an unheated area, such as a garage, the condensate pipework 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.
14
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
0010016301-001
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.
7.3

Fault 2980

CAUTION
Fault 2980
▶ If fault 2980 is visible on the boiler display then contact a qualified
heating engineer immediately. Do not attempt to remedy the fault
otherwise there is a chance this could lead to a serious, safety-related
fault. Heating and hot water will not be available until remedied by a
qualified heating engineer.
Greenstar 1000 – 6721835944 (2023/08)