Fault Finding - Bosch Worcester benchmark Greenstar 24i system User Instructions & Customer Care Manual

Problem
Desired room
temperature is not
reached
Desired room
temperature exceeded by
large amount
Heating stays on for too
long
No on/off indicator light
Hot water temperature
too low
Hot water temperature
too high
WORCESTER BOSCH GREENSTAR 12i/24i SYSTEM
8 716 107 376b (06/06)

FAULT FINDING

This table gives information on basic operating
system problems.
In the unlikely event of a boiler fault please read
the following page thoroughly before contacting
Worcester Bosch.
Cause
Thermostatic radiator
valve(s)/ room thermostat
set too low
Temperature control for
CH flow on boiler set too
low
Air trapped in heating
system
Radiators are too hot
Programmer is
incorrectly set
Momentary power failure
Programmer setting
Cylinder thermostat set too
low
Cylinder thermostat set too
high
Remedy
Increase thermostatic
radiator valve setting(s)/
room thermostat
Increase CH flow
temperature control
setting
Bleed radiators and
recharge heating system
Turn down thermostatic
radiator valves / room
thermostat
Reduce temperature on
boiler (This may affect the
temperature of the hot
water cylinder)
Check setting
Switch off appliance at
master switch, wait a few
seconds then switch on
again
Check setting
Adjust cylinder thermostat
Adjust cylinder thermostat
FAULT FINDING
13