Operating instructions
113
Troubleshooting
Faults which are displayed at the programming unit (cont.)
Fault
code
System
characteristics
Cause Remedy
0f
Control mode Maintenance
"0F" is only
displayed in fault
history.
Carry out
maintenance
Note
Set code "24:0" after
maintenance.
30
Burner is started
and stopped via a
control thermostat
Short circuit
Boiler water
temperature sensor
Check boiler water
temperature sensor
(see page 130)
38
Lead broken
Boiler water
temperature sensor
(pg )
50
Cylinder primary
pump ON:
Set cylinder
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
Short circuit
Cylinder temp.
sensor 1
Check cylinder temp.
sensor
(see page 130)
51
With cylinder
storage system:
Cylinder heating is
started and stopped
by cylinder temp.
sensor 1
Short circuit
Cylinder temp.
sensor 2
5862730GB