Maintaining Your Boiler; Fault Finding - Worcester Greenstar Ri User Instructions & Customer Care Manual

Your new Greenstar gas-fired boiler represents a long term investment in a reliable, high quality
product.
In order to realise its maximum working life, and to ensure it continues to operate at peak
efficiency and performance, it is essential that your boiler receives regular servicing and
maintenance checks from a competent person beyond the initial two year guarantee period.
If you would like to know more about a Worcester, Bosch Group service contract, please tick
the appropriate box on your warranty registration card.
If your Greenstar gas-fired boiler should fail to operate correctly or requires servicing please
contact the Worcester, Bosch Group Service Department, (see inside front cover for details).
Problem
Desired room
temperature is not
reached
Desired room
temperature exceeded by
large amount
Temperature rises
instead of falling
No on/off indicator
Hot water temperature
too low
Hot water temperature
too high
GREENSTAR Ri
8 716 115 172a (06/2008)
Cause
Thermostatic radiator
valve(s) set too low
Temperature control for
CH flow on boiler set too
low
Air trapped in heating
system
Radiators are too hot
Clock is incorrectly set
Momentary power failure
Cylinder thermostat
temperature set too low
Programmer setting
Diverter valve
Cylinder thermostat set too
high
Diverter valve

MAINTAINING YOUR BOILER

FAULT FINDING

Remedy
Increase thermostatic
radiator valve setting(s)
Increase CH flow
temperature control
setting
Bleed radiators and, if
fitted to a sealed system,
recharge heating system
Turn down thermostatic
radiator valves / room stat
Check setting
Switch off boiler at mains
power button, wait a few
seconds then switch on
again
Check setting
Adjust cylinder thermostat
MAINTAINING YOUR BOILER
9
/ FAULT FINDING