Technical data

Fault recognition and clearance
40
Installation instructions VRC 470 0020116690_00
10
10 Fault recognition and clearance
10.1 Error messages
If a fault occurs in your heating system, an error mes-
sage will appear in the controller display instead of the
basic display. You can access the basic display again by
pressing function key "Back".
If the display remains dark or you cannot make any
change to the display by pressing the function keys or
control knob, there is a system error.
You can also read all current error messages under
menu option "Information/System status" (¬10.2).
Display Meaning Connected units Cause
Heat generator
fault
Fault in boiler Boiler See boiler instructions
Heat generator
communication
fault
Boiler connection fault Boiler Cable defective, plug connection not correct
VIH RL
communication
fault
Cylinder connection fault Cylinder
actoSTOR VIH RL
Cable defective, plug connection not correct
External current
anode fault
External current anode fault
Cylinder
Cylinder
actoSTOR VIH RL
Cable defective, plug connection not correct, external
current anode defective
Sensor T1 fault Fault in temperature sensor 1 Temperature sensor 1 Cable defective, plug connection not correct, temper-
ature sensor defective
Sensor T2 fault Fault in temperature sensor 2 Temperature sensor 2 Cable defective, plug connection not correct, temper-
ature sensor defective
Sensor T3 fault Fault in temperature sensor 3 Temperature sensor 3 Cable defective, plug connection not correct, temper-
ature sensor defective
Sensor T4 fault Fault in temperature sensor 4 Temperature sensor 4 Cable defective, plug connection not correct, temper-
ature sensor defective
VR 68/2
communication
fault
Solar module VR 68/2 connection
fault
Solar module VR 68/2 Cable defective, plug connection not correct
Sensor KOL fault Collector sensor fault Solar module VR 68/2 Collector sensor defective
Sensor SP1 fault Fault in cylinder sensor 1, first
cylinder
Solar module VR 68/2 Cable defective, plug connection not correct, cylinder
sensor defective
Sensor SP2 fault Fault in cylinder sensor 2, first
cylinder
Solar module VR 68/2 Cable defective, plug connection not correct, cylinder
sensor defective
Sensor TD1 fault Fault in cylinder sensor 1, second
cylinder
Solar module VR 68/2 Cable defective, plug connection not correct, cylinder
sensor defective
Sensor TD2 fault Fault in cylinder sensor 2, second
cylinder
Solar module VR 68/2 Cable defective, plug connection not correct, cylinder
sensor defective
Solar gain sensor
fault
Solar gain sensor fault Solar gain sensor Cable defective, plug connection not correct, solar
gain sensor defective
VR 61/2
communication
fault
Mixer module VR 61/2 connection
fault
Mixer module VR 61/2 Cable defective, plug connection not correct
Sensor VF2 fault Fault in flow sensor VF2 Mixer module VR 61/2 Cable defective, plug connection not correct,
flow sensor defective
Tab. 10.1 Error messages