F Safety Sensor Exceeds 100 °C - Buderus 24C Servicing Manual

Troubleshooting
4
Flashing
Safety sensor temp. exceeds 100 °C
"reset"
New fault
warning message 4F?
Check system and heat exchanger, as
indicated in the installation and servicing
instructions, for signs of airlocks and
dirt - purge and/or clean as required
Are all
maintenance shutoff
valves open?
Is the water
pressure in the system at
least 1 bar?
Is at least one
thermostatic valve open (to
control the amount of water
circulating)?
Remove the casing (page 48)
Check circulation pump (page 54)
Circulation pump OK?
Check safety sensor
(page 55)
Safety sensor
OK?
page 46
Fig. 14 Fault warning message 4F: Safety sensor temp. exceeds 100 °C
Subject to modifications resulting from technical improvements!
Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006
F
Yes
Yes
Yes
Yes
Yes
No
Yes
A
No
No
Open maintenance shutoff valves
Fill up with water as indicated in the
No
installation and servicing instruc-
tions, and purge the system of air
No
Open one thermostatic valve
No
Replace circulation pump (page 54)
Replace safety sensor
(page 55)
Fit the casing (page 48)
"reset"
600 Series 11S / 19S / 24S / 24C
OK
Buderus Ltd. • http://www.buderus-domestic.co.uk
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