Buderus 800-24, Инструкции по установке и обслуживанию

Страница: 38 / 68

Servicing 5
38 Installation and servicing instructions condensing gas boiler 800 - 24/29/43/60 and 800 - 24T25/29T25 H/V • edition 02/2006
Subject to modifications resulting from technical improvements ! Buderus • http://buderus-domestic.co.uk
5.2 Fault codes
Code Meaning
1C
Flue gas thermostat (STB) has been tripped
Possible
cause Action
1 Water pressure is too low in the installation Top up the system (see subsection 2.1.1)
2 Connection in cable harness defective or is getting too
hot Check cable harness and press "reset" until "r" appears in
the display
3 Flue gas thermostat if present is defective or is getting
too warm Check the cable connections and press "reset" until "r"
appears in the display. Replace if necessary
Code Meaning
2C
Safety sensor exceeds 95 °C, blocked for 30 sec.
Possible
cause Action
1 Resistance in the installation is too high Check if not all (thermostatic) radiator valves are clogged
with dirt. Bypass is installed incorrectly
2 Safety sensor is faulty Measure if resistance over the sensor is correct.
If not replace safety sensor temporarily with another one
(see subsection 5.3.9 and subsection 5.3.10)
3 Problem with the pump or pump cabling
(no circulation) Check if the pump cabling is faulty or if the pump is stuck
(see subsection 5.3.7)
4 Water pressure is too low in the installation Top up the system (see subsection 2.1.1)
Code Meaning
2F
Temperature difference between the safety sensor and flow sensor is greater than or equal to 15 °K,
blocked for 30 sec.
Possible
cause Action
1 Resistance in the installation is too high Check if not all (thermostatic) radiator valves are closed or
clogged with dirt
2 Safety sensor is dirty or faulty Check the safety sensor for dirt. Measure if resistance over
the sensor is correct. If not replace safety sensor
temporarily with another one (see subsection 5.3.9 and
subsection 5.3.10)
3 Flow sensor is dirty or faulty Check the sensor, replace if necessary by temporarily
connecting another one (see subsection 5.3.9 and
subsection 5.3.10)
4 Problem with the pump or pump cabling
(no circulation) Check if the pump cabling is faulty or if the pump is stuck.
Replace pump if necessary (see subsection 5.3.7 and
subsection 5.3.8)
5 Water pressure is too low in the installation Top up the system (see subsection 2.1.1)