C Cylinder Sensor Solar - Viessmann VITOTRONIC 200 Service Instructions Manual

Troubleshooting
Message overview

9C Cylinder sensor solar

No solar DHW heating with solar control module,
type SM1
Cause
Lead break, cylinder temperature sensor at solar con-
trol module, type SM1
9E Delta T mon. solar
No solar DHW heating with solar control module,
type SM1
Cause
Insufficient or no flow rate in the solar circuit
■
or
Temperature limiter has responded.
■
9F Internal fault, solar
No solar DHW heating with solar control module,
type SM1
Cause
Fault, solar control module, type SM1
A0 Ventilation. Check filter(s)
Mechanical ventilation in control mode
Cause
Outdoor air and extract air filter on ventilation unit
■
contaminated
Last filter change was more than 1 year ago.
■
A1 compressor 1
Compressor 1 in a 2-stage refrigerant circuit is
switched OFF.
Cause
One of the following events has occurred 9 times:
High pressure limit exceeded
■
High pressure limit not reached
■
Excessively high hot gas temperature
■
Low pressure limit undershot
■
Flow switch has responded.
■
Suction gas superheating too low
■
90
(cont.)
Action
Check sensor on solar control module, type SM1:
%
See installation and service instructions for solar control
module, type SM1.
Action
Check solar circuit pump
sF
type SM1: See installation and service instructions for
solar control module, type SM1.
Action
Replace solar control module, type SM1.
Measure
Vitovent 200-C/300-F:
■
Replace outdoor air and extract air filters. Do not
clean filters.
Vitovent 200-W/300-C/300-W:
■
Clean outdoor air and extract air filters. In the event of
severe contamination replace both filters at least
once every 12 months.
Action
Scanning further heat pump messages: "Message
■
history"
Observe messages from the refrigerant circuit con-
■
troller: "Diagnosis" "Refrigerant circuit"
sage history"
Check flow rates.
■
Check motor currents/motor overload relay.
■
Check safety high pressure switch.
■
on solar control module,
"Mes-