Vitodens 200-W B2HA 112, 150 Service
73
5683 710 - 09
Fault Codes
(continued)
Troubleshooting
*1
Control mode: Boiler/burner fully operational (fault code must be verified and reset).
Burner in fault mode: Boiler control requires manual reset before burner can resume operation.
Burner blocked: If fault cause is corrected, burner resumes operation.
*2
Detailed fault code coding address 38:xx (if available).
Fault code
on display
Detailed fault
code
*2
System behavior
*1
Cause
Corrective action
30
140
Burner blocked
Short circuit on boiler
water temperature
sensor
Check the boiler water
temperature sensor
(see page 81).
38
140
Burner blocked
Boiler water temperature
sensor cable broken
Check the boiler water
temperature sensor
(see page 81).
40
-
Mixing valve closes
Heating circuit 2 with
mixing valve supply
short circuit on
temperature sensor
Check the supply
temperature sensor
?
@@
(see page 81).
44
-
Mixing valve closes
Short circuit, flow
temperature sensor,
heating circuit 3
(with mixing valve)
Check flow temperature
sensor (see page 81).
48
-
Mixing valve closes
Heating circuit 2 with
mixing valve supply
temperature sensor
cable broken
Check the supply temperature
sensor
?
(see page 81).
4C
-
Mixing valve closes
Flow temperature
sensor cable broken
circuit 3 (with mixing
valve)
Check flow temperature
sensor (see page 81).
50
-
No DHW heating
Short circuit on DHW
tank temperature
sensor
%
Check the DHW sensor
%
(see page 81).
58
-
No DHW heating
Tank temperature
sensor
%
cable broken
Check the DHW sensor
%
(see page 81).
90
-
Control mode
Short circuit on
temperature sensor
/
Check sensor
/
on solar
control module.
91
-
Control mode
Short circuit on
temperature sensor
Check sensor
on solar
control module.
92
-
No solar DHW heating
Short circuit on collector
temperature sensor
&
Check the sensor
&
at the
solar control module.
93
-
Control mode
Short circuit on collector
temperature sensor
&
Check the sensor
&
at the
solar control module.
94
-
No solar DHW heating
Short circuit on tank
temperature sensor
%
Check the sensor
%
at the
solar control module.
98
-
Control mode
Tank temperature
sensor
/
cable broken
Check sensor
/
on solar
control module.
99
-
Control mode
Temperature sensor
cable broken
Check sensor
on solar
control module.
9A
-
No solar DHW heating
Collector temperature
sensor
&
cable broken
Check the sensor
&
at the
solar control module.
9B
DO NOT
USE
Control mode
Tank temperature
sensor cable broken
Check temperature sensor at
connection S3 to the Vitosolic
solar control.