Worcester GREENSTAR CAMRAY EXTERNAL Instruction Manual page 55

Start
Boiler not operating normally.
Find symptom in list below.
Is there an automatic bypass fitted,
Boiling/
Is the system water
boiler Yes (3m min. circuit length), if TRVs are
circulating normally?
overheat
thermostat
No
tripping out.
Fit an automatic bypass valve to give
Check and rectify the
at least a 3 metre circuit when
system/circulating pump.
Is the boiler/burner Is the short cycling
Short
output matched to the caused by the external
Yes
cycling
heating load?
No
Reduce the boiler/burner
Replace the control
output following the
instruction manual settings.
Flue
Has the burner been
Is the boiler filled with
Yes
overheat
water?
thermostat
tripping out
No
Check boiler & flue for damage,
Service the burner and
replace any damaged
components before filling boiler.
FAULT FINDING
& DIAGRAMS
These fault finding charts are provided to assist competent and suitably qualified engineers to
locate and rectify faults. Whilst every effort has been taken to ensure the information given is
correct and complete we cannot guarantee that every eventuality has been covered.
Worcester, Bosch Group cannot be held responsible for costs incurred by persons not deemed
to be competent.
Is the control thermostat
Yes bulb pushed firmly down
used on all radiators? the thermostat pocket?
No No
Push themostat fully
down the thermostat
activated. pocket.
Check and correct all
Yes
external controls.
controls?
No
thermostat.
Are all the baffles and restictor
Yes
plate/s fitted? (See installation
serviced?
section for details).
No No
Refit baffles and restrictor
plate/s as appropriate for
the boiler.
output.
Is the flow temperature Replace the control
Yes Yes
above 85°C? thermostat.
No
Replace boiler overheat
thermostat.
Replace the flue
Yes
overheat thermostat
UNDER NO
CIRCUMSTANCES MUST
AN APPLIANCE BE LEFT
OPERATING WITH ANY
CONTROL LINKED OUT OR
OVER RIDDEN.