Viessmann VITODENS 200-W Service Instructions Manual page 73

Vitodens 200-W B2HA 112, 150 Service
Fault Codes
(continued)
Fault code Detailed fault
on display code*2
30 140
38 140
40 -
44 -
48 -
4C -
50 -
58 -
90 -
91 -
92 -
93 -
94 -
98 -
99 -
9A -
9B
DO NOT
USE
*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).
System behavior*1
Burner blocked
Burner blocked
Mixing valve closes
Mixing valve closes
Mixing valve closes
Mixing valve closes
No DHW heating
No DHW heating
Control mode
Control mode
No solar DHW heating
Control mode
No solar DHW heating
Control mode
Control mode
No solar DHW heating
Control mode
Cause
Short circuit on boiler
water temperature
sensor
Boiler water temperature
sensor cable broken
Heating circuit 2 with
mixing valve supply
short circuit on
temperature sensor
Short circuit, flow
temperature sensor,
heating circuit 3
(with mixing valve)
Heating circuit 2 with
mixing valve supply
temperature sensor
cable broken
Flow temperature
sensor cable broken
circuit 3 (with mixing
valve)
Short circuit on DHW
tank temperature
sensor %
Tank temperature
sensor % cable broken
Short circuit on
temperature sensor /
Short circuit on
temperature sensor
Short circuit on collector
temperature sensor &
Short circuit on collector
temperature sensor &
Short circuit on tank
temperature sensor %
Tank temperature
sensor / cable broken
Temperature sensor
cable broken
Collector temperature
sensor & cable broken
Tank temperature
sensor cable broken
Troubleshooting
Corrective action
Check the boiler water
temperature sensor
(see page 81).
Check the boiler water
temperature sensor
(see page 81).
Check the supply
temperature sensor ?@@
(see page 81).
Check flow temperature
sensor (see page 81).
Check the supply temperature
sensor ? (see page 81).
Check flow temperature
sensor (see page 81).
Check the DHW sensor %
(see page 81).
Check the DHW sensor %
(see page 81).
Check sensor / on solar
control module.
Check sensor on solar
control module.
Check the sensor & at the
solar control module.
Check the sensor & at the
solar control module.
Check the sensor % at the
solar control module.
Check sensor / on solar
control module.
Check sensor on solar
control module.
Check the sensor & at the
solar control module.
Check temperature sensor at
connection S3 to the Vitosolic
solar control.
73