Fault
code
on the
display
Const.
weath.-
comp.
System char-
acteristics
Cause
Measures
59
X
X
No DHW heat-
ing
Outlet tem-
perature
sensor lead
broken
Check sensors
(see page 89)
A2
X
Emergency
mode with in-
sufficient sys-
tem pressure,
triggered by
code "0d" (see
page 49)
System
pressure too
low
Top up with water
A4
X
Control mode
Max. system
pressure ex-
ceeded
Check system
pressure.
Check the func-
tion and sizing of
the diaphragm ex-
pansion vessel.
Vent the heating
system.
Code "0E" is set
to 1 to document
the fault. After the
fault has been re-
moved, reset
manually to 0.
A7
X
Control mode
as per deliv-
ered condition
Faulty pro-
gramming
unit
Replace program-
ming unit
A8
X
Burner
blocked. The
venting pro-
gram is started
automatically
(see page 46)
Air lock in
the internal
circulation
pump or
minimum
flow rate not
achieved
Vent the system if
the fault message
continues to be
displayed
Fault codes
(cont.)
79
Troubleshooting
56
92
682
GB
Summary of Contents for Vitodens 333-F
Page 5: ...Keyword index 133 Index cont 5 Index 5692 682 GB ...
Page 123: ...Parts lists cont 123 Parts lists 5692 682 GB ...
Page 124: ...Parts lists cont 124 Parts lists 5692 682 GB ...
Page 125: ...Parts lists cont 125 Parts lists 5692 682 GB ...
Page 126: ...Parts lists cont 126 Parts lists 5692 682 GB ...
Page 127: ...Parts lists cont 127 Parts lists 5692 682 GB ...
Page 128: ...Parts lists cont 128 Parts lists 5692 682 GB ...
Page 135: ...Keyword index cont 135 Keyword index 5692 682 GB ...