Viessmann VITOTRONIC 100, HC1 Installation And Service Instructions Manual page 45

Faults displayed at the programming unit
Fault
System characteristics
code
0 0 0 0 f f f f Control mode
3 3 3 3 0 0 0 0
Burner blocked
3 3 3 3 8 8 8 8
b b b b 0 0 0 0
b b b b 1 1 1 1 Control mode (stays in factory
default setting)
b b b b 4 4 4 4 regulates as if the outdoor
temperature was 32°F / 0°C
b b b b 5 5 5 5
Control mode
(factory default setting)
b b b b 7 7 7 7
Burner blocked
b b b b 8 8 8 8
e4 4 4 4
e5 5 5 5
e8
Burner in fault mode
e9
ea
(continued)
Cause
Service "0F" is only displayed in the
fault history
Boiler water temperature sensor
shorted out
Boiler water temperature sensor
cable broken
Flue gas temperature sensor
shorted out.
Communication fault -
programming unit (internal)
Internal fault
Boiler coding card missing, faulty or
incorrect boiler coding card.
Flue gas temperature sensor cable
broken.
Fault, supply voltage 24V
Internal fault
The ionization current lies outside
the permiss. range.
The ionization current lies outside
the permiss. range during
calibration.
The ionization current lies outside
the permiss. range during
calibration.
Troubleshooting – Vitotronic 100, HC1
Remedy
Service the equipment.
Note:
After the service, reset coding
address "24" to "0".
Check the boiler water temperature
sensor
Check the flue gas temperature
sensor (see Vitodens 200-W
Start-up/Service Instructions).
Check connections and replace
programming unit, if required.
Replace the control unit.
Plug in boiler coding card or replace,
if faulty.
Check the flue gas temperature
sensor (see Vitodens 200-W
Start-up/Service Instructions)
Replace the control unit.
Check ionization electrode and
connecting cables, check tightness
of flue gas system.
Press "E RESET".
Check ionization electrode and
cable. Press "E RESET".
Check ionization electrode and
cable. Press "E RESET".
Check ionization electrode and
cable. Press "E RESET".
45