Viessmann Vitocal 300-G BW, Installation And Service Instructions Manual

Page: 119 / 216

119
ID Message (pri-
ority) 1. Cause
2. Measures Access right
92 Collector sen-
sor ("
U
")
1. Short circuit, collector temperature sen-
sor solar - Vitosolic
2. Check the sensor and replace, if
required
(see Vitosolic installation instructions)
Customer
93 Return temper-
ature sensor
("
U
")
1. Short circuit, return temperature sensor
solar - Vitosolic
2. Check the sensor and replace, if
required
(see Vitosolic installation instructions)
Customer
9A Collector sen-
sor ("
U
")
1. Break, collector temperature sensor -
Vitosolic
2. Check the sensor and replace, if
required
(see Vitosolic installation instructions)
Customer
9B Return temper-
ature sensor
("
U
")
1. Break, return temperature sensor solar
- Vitosolic
2. Check the sensor and replace, if
required
(see Vitosolic installation instructions)
Customer
A6 Secondary
pump ("
U
")
1. No volume flow in the secondary circuit
2. Check the pump and replace, if
required
Customer
A7 Solar circuit
("
U
")
1. Solar circuit without DHW circulation
2. Check the solar circuit pump and
replace, if required
Customer
A8 Pump, heating
circuit 1 ("
U
")
1. Heating circuit pump HK1 without DHW
circulation
2. Check the external heating circuit
pump and replace, if required
Customer
Troubleshooting
Control unit diagnostics
(cont.)
5368 522 UAE
Service