Lead Break, Boiler Water Temperature Sensor - Viessmann Vitotronic 11 CC1E Installation And Service Instructions Manual

Troubleshooting
Fault messages
(cont.)

38 Lead break, boiler water temperature sensor

With DHW cylinder:
■
Circulation pump for cylinder heating on, boiler is
maintained at set cylinder temperature.
Cause
Lead break, boiler water temperature sensor
3A LAN hardware error
Control mode
Cause
Network module error
3B LAN system error
Control mode
Cause
Memory problems
50 Short circuit, cylinder temperature sensor 1
Cylinder loading pump on:
■
DHW temperature target = set flow temperature
Priority control is cancelled.
or
■ With cylinder loading system:
Cylinder heating is started and stopped via cylinder
temperature sensor 2.
Cause
Short circuit, cylinder temperature sensor 1
51 Short circuit, cylinder temperature sensor 2
With cylinder loading system:
Cylinder heating is started and stopped via cylinder
temperature sensor 1.
Cause
Short circuit, cylinder temperature sensor 2
52 Short circuit, buffer temperature sensor
Control mode
88
Without DHW cylinder:
■
Boiler is regulated by the temperature controller.
Measure
Check the boiler water temperature sensor: See chap-
ter "Checking temperature sensors"
Measure
Check the network module and replace if necessary.
Measure
Switch the control unit OFF and ON again.
Measure
Check the cylinder temperature sensor: See chapter
"Checking temperature sensors"
Measure
Check the cylinder temperature sensor: See chapter
"Checking temperature sensors"