Viessmann Vitotronic 200 Installation And Service Instructions For Contractors page 99

Fault messages
(cont.)
Cause
Lead break, cylinder temperature sensor,
connection of temperature sensor
module or sensor at S2 of the Vitosolic
9E Delta T monitoring, solar control unit
Control mode
Cause
No flow rate in solar circuit or flow rate too low, or tem-
perature limiter has responded.
9F Solar control unit
Control mode
Cause
Fault, solar control module, type SM1 or Vitosolic
Displayed if a fault occurs at these devices that has no
fault message in the Vitotronic.
A0 Fault message module 2: Safety equipment 1
Boiler cools down.
Cause
Fault, safety equipment at "X7" of plug-in adaptor 2 for
external safety equipment
A1 Fault message module 2: Safety equipment 2
Boiler cools down.
Cause
Fault, safety equipment at "X3" of plug-in adaptor 2 for
external safety equipment
A2 Fault message module 2: Safety equipment 3
Boiler cools down.
Cause
Fault, safety equipment at "X2" of plug-in adaptor 2 for
external safety equipment
A3 Fault message module 2: Safety equipment 4
Boiler cools down.
Measure
Check sensor at the solar control unit (see separate in-
at solar control stallation and service instructions).
%
Measure
Check solar circuit.
Acknowledge fault message (see separate installation
and service instructions).
Measure
Check solar control unit (see separate installation and
service instructions).
Measure
Check safety equipment, and reset if required.
Measure
Check safety equipment, and reset if required.
Measure
Check safety equipment, and reset if required.
Troubleshooting
99