Fault Finding - Worcester GREENSTAR 30CDi 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
Hot water temperature too
low
Hot water temperature too
high
20

FAULT FINDING

FAULT FINDING
This table gives information on basic
operating system problems.
In the unlikely event of a boiler fault
please read the following page tho-
roughly before contacting Worcester
Bosch.
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
Temperature set too low
Programmer setting
Temperature set too high
WORCESTER BOSCH GREENSTAR 30CDi System
Remedy
Increase thermostatic
radiator valve setting(s)
Increase CH flow tempera-
ture control setting
Bleed radiators and rechar-
ge heating system
Turn down thermostatic
radiator valves / room ther-
mostat
Reduce central heating
temperature on boiler
Check setting
Switch off appliance at
master switch, wait a few
seconds then switch on
again
Check setting
Check setting
Check setting
6 720 612 454a (05/10)