Vitodens 200-W B2HA 112, 150 Service
75
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
BD
-
Control mode without remote
control
Communication error,
remote control Vitotrol
heating circuit 2
(with mixing valve)
Check connections, cable,
coding address “A0” in “Heating
circuit” group and remote
control unit setting.
BE
-
Control mode with out
remote control
Communication error,
remote control Vitotrol
heating circuit 3
(with mixing valve)
Check connections, cable,
coding address “A0” in “Heating
circuit” group and remote
control unit setting.
BF
-
Control mode
Incorrect LON
communication module
Replace LON communication
module.
C1
-
Control mode
Communication fault
extension EA1
Check connections.
C2
-
Control mode
Communication fault -
solar control unit or
Vitosolic
Check solar control or Vitosolic.
C3
-
Control mode
Extension AM1
communication fault
Check connections.
C4
-
Control mode
Communication fault,
Open Therm extension
Check Open Therm extension.
C5
-
Control mode, max. pump
speed
Communication error,
variable speed internal
pump
Check setting of coding address
“30”
CD
DO NOT
USE
-
Control mode
Communication fault,
Vitocom 100 (KM-BUS)
Check connections Vitocom
100 coding address “95”
CF
-
Control mode
Communication fault -
LON communication
module
Replace LON communication
module.
D6
-
Control mode
Input DE1 reports a
fault at extension EA1
Remove fault at appliance
concerned.
D7
-
Control mode
Input DE2 reports a
fault at extension EA1
Remove fault at appliance
concerned.