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Viessmann Manuals
Boiler
VITODENS 343-F WS4A
Installation and service instructions manual
Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual page 94
Compact energy tower with a gas fired condensing boiler as compact model; natural gas and lpg version
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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Troubleshooting
Fault codes
(cont.)
Fault code
System character-
on the dis-
istics
play
9A
Control mode
93
Control mode
9b
Control mode
94
Control mode
9C
Control mode
9F
Control mode
A6
Control mode
A7
Control mode as per
delivered condition
b0
Burner blocked
b8
Burner blocked
b1
Control mode as per
delivered condition
94
Cause
Measures
Solar: Lead of the
Check the sensor (see
collector tempera-
page 102).
ture sensor S1 at
the Vitosolic bro-
ken
Solar: Sensor S3
Check the sensor (see
at the Vitosolic
page 102).
shorted out
Solar: Lead of the
Check the sensor (see
sensor S3 at the
page 102).
Vitosolic broken
Solar: Cylinder
Check sensor.
temperature sen-
sor S2 at the
Vitosolic shorted
out
Lead of the cylin-
Check the sensor (see
der temperature
page 102).
sensor S2 at the
Vitosolic broken
Solar control unit
See solar control unit
fault message
service instructions.
Impressed cur-
Check impressed cur-
rent anode faulty;
rent anode cable con-
no protective cur-
tacts (see page 42)
rent
Faulty program-
Replace the program-
ming unit.
ming unit.
Flue gas tem-
Check the flue gas tem-
perature sensor
perature sensor (see
shorted out
page 104).
Flue gas tem-
Check the flue gas tem-
perature sensor
perature sensor (see
lead broken
page 104).
Communication
Check connections and
fault; program-
replace the program-
ming unit (inter-
ming unit, if necessary.
nal)
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Chapters
Index Installation Instructions
4
Steps - Commissioning, Inspection and Maintenance
21
Table of Contents
Troubleshooting
Troubleshooting
91
Fault codes
92
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