Technical data

Energy Technology
Ltd.
59
22 - Unacceptably high resistance in flue or air supply tubes or flue blocked / Check flue
for suitability or clear obstruction
23 - Leakage of flue gas from flue gas tube into air tube vitiating the combustion air / Strip
out flue system and remake joints
24 - Zone pumps not running / Check and rectify
25 – Heat exchangers fouled internally with silt or scale / Clean, descale heat exchangers
and system and re-dose system with water treatment
26 - Heat exchanger high limit stat defective / Replace limit stat
27 - Boiler set for wrong gas type / Convert boiler to burn the gas being supplied
28 - Flue gas limit stat defective / Replace limit stat
29 - Boiler control panel defective / Replace control panel
30 - Incorrect position of ignition electrode / Reset gap 4-5mm
31 - moisture in-on electrical connections or components / Dry carefully using warm air
from a hair dryer
32 - Incorrect electrical connection / Check and rectify
33 - Wiring interrupted (broken wire) / Check and rectify
34 - reset button stuck / Press button in attempt to free sticking contacts. If no success
then replace control panel
35 - Ignition electrode damaged or broken / Replace electrode
& corrective action
21.2 (possible) causes of fault