Viessmann VITOTRONIC 100 Installation And Service Instructions Manual page 114

Troubleshooting
Faults which are displayed at the programming unit
Fault
System
code
characteristics
Cylinder primary
58
pump ON:
Set cylinder water
temperature = set
boiler water
temperature,
priority control is
cancelled
or
With cylinder
storage system:
Cylinder heating is
started and stopped
by cylinder temp.
sensor 2
With cylinder
59
storage system:
Cylinder heating is
started and stopped
by cylinder temp.
sensor 1
Boiler at maximum
60
temperature,
no output reduction,
return control OFF
68
Shunt pump
70
constantly ON
With cylinder
storage system: storage system:
78
Mixer primary
circuit closed, no
DHW heating
114
Cause
Lead broken
Cylinder temp.
sensor 1
Lead broken
Cylinder temp.
sensor 2
Short circuit
Temperature sensor
aJA
p ,
Lead broken
Temperature sensor
aJA
Short circuit
Temperature sensor
aJB
Lead broken
Temperature sensor
aJB
(cont.)
Remedy
Check cylinder temp.
sensor
(see page 130)
Check temperature
sensor
(see page 131).
( p g )
Without
temperature sensor
Set code "4A:0"
Check temperature
sensor
(see page 131).
Without Without
temperature sensor
Set code "4b:0"