Troubleshooting; Extreme Cold Weather - Worcester GR8700iW 30 S NG User Instructions

Malfunction or failure
• Is the cold water main turned on?
• Sealed heating system:
– Is the static system pressure (when appliance is cold) between
1 - 1.5 bar?
• Do you have gas?
– Are other gas appliances working, gas cooker/hob for example?
– Has your credit run out on your gas pre-payment meter?
Details of your installer should be available in the Commissioning
Checklist or can be recorded in the following section.
Installer/maintenance engineer
Installer/maintenance engineer details
Engineer name:
Company
name:
Company
address:
Telephone:
Email:
Table 8
Worcester, Bosch Group
The appliance is supported in the UK and Eire by Worcester, Bosch
Group.
Specialist service engineers are available to attend an appliance
breakdown.
Invoices for attendance and repair work carried out on this appliance by
any third party will not be accepted.
• No charge will be made for parts and/or labour providing:
– The appliance fault is found and the appliance is within the
guarantee period. Reasonable evidence of this must be supplied
on request. i.e. a completed Commissioning and service record
and has been regularly serviced.
• A call-out charge will be made where:
– The appliance is outside the guarantee period or has not been
serviced in accordance with the manufacturers instructions.
– Our Field Service Engineer finds no fault with the appliance.
– The cause of breakdown is misuse or with other parts of your
plumbing/heating system, or with equipment not supplied by
Worcester, Bosch Group.
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 a 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).
12
9.1

Troubleshooting

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 (page
6).
9.2

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!
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.
Greenstar 8000 Style – 6720883869 (2018/05)