Viessmann VITOTRONIC 200 Installation And Service Instructions Manual page 72

Troubleshooting
Fault Display Vitotronic 300-K
Fault codes
Displayed fault code
94
98
99
9A
9B
9C
9E
9F
AB
B1
B5
72
(continued)
System characteristics
No solar DHW heating.
Control mode.
Control mode.
No solar DHW heating.
Control mode.
No solar DHW heating.
Control mode.
Control mode.
Control operation, DHW
tank may be cold.
Control mode.
Control mode.
Vitotronic 200 and 300-K Installation and Service
Cause
Short circuit, DHW tank
temperature sensor, connection
of temperature sensor % at
solar control module or sensor
at S2 of the Vitosolic.
Lead break, temperature sensor
/, connection to solar control
module.
Lead break, temperature sensor
aÖ, connection to solar control
module.
Lead break, collector
temperature sensor, connection,
temperature sensor & at solar
control module or sensor at S1
of the Vitosolic.
Lead break, temperature
sensor, connection at S3 of the
Vitosolic.
Lead break, DHW tank
temperature sensor, connection
of temperature sensor % at
solar control module or sensor
at S2 of the Vitosolic.
No flow rate in solar circuit
or flow rate too low, or
temperature limiter has
responded.
Solar control module
or Vitosolic faulty.
Displayed if a fault occurs at
these devices that has no fault
code in the Vitotronic.
Primary store system
configuration error:
Code "55:3" has been selected,
but plug aJB is not plugged
in and/or Codes "4C:1" and
"4E:2" have not been set.
Communication error,
programming unit
Internal fault
Measures
Check sensor at the solar
control unit (see separate
installation and service
instructions).
Check temperature sensor /
(see separate installation and
service instructions).
Check coding address 20
in "Solar" group.
Check temperature sensor aÖ
(see separate installation and
service instructions).
Check coding address 20
in "Solar" group.
Check sensor at the solar
control unit (see separate
installation and service
instructions).
Check sensor at the solar
control unit (see separate
installation and service
instructions).
Check sensor at the solar
control unit (see separate
installation and service
instructions).
Check solar circuit.
Acknowledge fault message
(see separate installation and
service instructions).
Check solar control unit (see
separate installation and service
instructions).
Insert plug aJB and check
coding.
Check connections and replace
the programming unit if
required.
Check correct insertion
of PCB (see parts list).