Bosch GREENSTAR CDI C13 User Manual Page 157

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WORCESTER BOSCH GREENSTAR 30/40CDi Conventional
6 720 612 033a (03/05)
19
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.
Problem Cause Remedy
Desired room temperature
is not reached
Thermostatic radiator
valve(s) set too low
Increase thermostatic
radiator valve setting(s)
Temperature control on boi-
ler set too low
Increase temperature con-
trol setting
Air trapped in heating
system
Bleed radiators and rechar-
ge heating system
Desired room temperature
exceeded by large amount
Radiators are too hot Turn down thermostatic
radiator valves / room ther-
mostat
Reduce temperature on
boiler
Heating stays on for too
long
Clock is incorrectly set Check setting
No on/off indicator Momentary power failure Switch off appliance at
master switch, wait a few
seconds then switch on
again
Hot water Temperature too
low
Tank thermostat
temperature set too low
Programmer setting
Diverter valve
Check setting
MAINTENANCE
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