Viessmann VITOTRONIC 100 GC1B Installation And Service Instructions Manual page 88

Troubleshooting
Fault Display
(continued)
Fault Codes
Displayed System Characteristics
Fault Code
9A No solar DHW heating.
9b No solar DHW heating.
9C Control mode.
9E Control mode.
9F Control mode.
A0 Boiler cools down.
A1 Boiler cools down.
A2 Boiler cools down.
A3 Boiler cools down.
AA Control mode.
Ab Control operation;
DHW tank may be
cold.
88
Cause
Lead break, collector temperature
sensor, connection of temperature
sensor & at solar control module.
Lead break, temperature sensor,
connection of sensor at S3 of the
Vitosolic.
Lead break, DHW tank temperature
sensor, connection of temperature
sensor % at solar control module.
No flow rate in solar circuit or flow
rate too low, or temperature limiter
has responded.
Solar control module or Vitosolic fault.
Displayed if a fault occurs at these
appliances that has no fault code
in the Vitotronic.
Fault, safety equipment at "X7"
of plug-in adaptor 2 for external
safety equipment.
Fault, safety equipment at "X3"
of plug-in adaptor 2 for external
safety equipment.
Fault, safety equipment at "X2" of
plug-in adaptor 2 for external safety
equipment.
Fault, safety equipment at "X1" of
plug-in adaptor 2 for external safety
equipment.
Therm-Control configuration fault:
Plug aJA not plugged in.
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" in the
"General" category have not been set.
Vitotronic 100, GC1B Installation and Service
Measures
Check solar control unit sensor.
Solar control unit installation
and service instructions
Check solar control unit sensor.
Solar control unit installation
and service instructions
Check solar control unit sensor.
Solar control unit installation
and service instructions
Check solar circuit pump and solar
circuit.
Acknowledge fault message.
Solar control unit installation
and service instructions
Check solar control unit.
Solar control unit installation
and service instructions
Check safety equipment, and reset
if required.
Check safety equipment, and reset
if required.
Check safety equipment,
and reset if required.
Check safety equipment,
and reset if required.
Insert plug aJA.
For Vitocrossal, code "0d:
0" in group 2 "Boiler" must be selected.
Insert plug aJB and check codes.