Viessmann VITODENS 242-F Installation And Service Instructions Manual page 126
3.2 to 26 kw gas condensing/solar storage combi boiler gas council no. 41-819-18; 41-819-19 natural gas and lpg version
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Also See for VITODENS 242-F:
- Installation and service instructions manual (152 pages) ,
- Technical manual (112 pages) ,
- Installation and service instructions for contractors (144 pages)
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Troubleshooting
Fault codes
(cont.)
Displayed
System characteris-
fault code
tics
40
Mixer closes
44
Mixer closes
48
Mixer closes
4C
Mixer closes
50
No DHW heating
51
No DHW heating
58
No DHW heating
59
No DHW heating
92
No solar DHW heat-
ing.
126
Cause
Short circuit, flow
temperature sen-
sor, heating circuit
2 (with mixer)
Short circuit, flow
temperature sen-
sor, heating circuit
3 (with mixer)
Lead break, flow
temperature sen-
sor, heating circuit
2 (with mixer)
Lead break, flow
temperature sen-
sor, heating circuit
3 (with mixer)
Short circuit, cylin-
der temperature
sensor
Short circuit, outlet
temperature sen-
sor
Lead break, cylin-
der temperature
sensor
Lead break, outlet
temperature sen-
sor
Short circuit, col-
lector temperature
sensor; tempera-
ture sensor &
connection on the
solar control mod-
ule.
Measures
Check flow temperature
sensor
Check flow temperature
sensor
Check flow temperature
sensor
Check flow temperature
sensor
Check cylinder tempera-
ture sensor (see
page 140)
Check the outlet tempera-
ture sensor (see
page 140)
Check cylinder tempera-
ture sensor (see
page 140)
Check the outlet tempera-
ture sensor (see
page 140)
Check collector tempera-
ture sensor (see
page 140)
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