Viessmann Vitocal 300-G Installation And Service Instructions Manual page 123

Control unit diagnostics
ID Message
(priority)
50 DHW sens.
Top ("U")
52 DHW sens.
Bottom ("U")
54 DHW solar
("U")
58 DHW sens.
Top ("U")
5A DHW sens.
Bottom ("U")
5C DHW solar
("U")
60 Buffer cyl.sen-
sor ("U")
63 Ext. Heat
source ("U")
68 Buffer cyl.sen-
sor ("U")
(cont.)
1. Cause
2. Measures
1. Short circuit, DHW temperature sen-
sor, top
2. Check the sensor and replace, if
required
1. Short circuit, DHW temperature sen-
sor, bottom
2. Check the sensor and replace, if
required
1. Short circuit, DHW temperature sen-
sor solar - Vitosolic
2. Check the sensor and replace, if
required
(see Vitosolic installation instructions)
1. Break, DHW temperature sensor, top
2. Check the sensor and replace, if
required
1. Break, DHW temperature sensor,
bottom
2. Check the sensor and replace, if
required
1. DHW temperature sensor solar -
Vitosolic
2. Check the sensor and replace, if
required
(see Vitosolic installation instructions)
1. Short circuit, heating water buffer
cylinder temperature sensor
2. Check the sensor and replace, if
required
1. Short circuit, external heat source
temperature sensor
2. Check the sensor and replace, if
required
1. Break, heating water buffer cylinder
temperature sensor
2. Check the sensor and replace, if
required
Troubleshooting
Access
right
Customer
Customer
Customer
Customer
Customer
Customer
Customer
Customer
Customer
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