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43Operating manual for the auroMATIC 620 0020094404_00 Controller
Error message Cause
VR 60 (4) comms error There is no communication with
the VR 60 mixer module at bus
address 4.
Information displayed:
– the affected component
– the unreachable address
an indication that communica-
tion is interrupted
the bus cable is not connected
the power supply is missing,
the component is defective.
Boiler comms error There is no communication with
the boiler. This message alerts you
to a boiler fault. It is possible that
it is not in operation.
Boiler fault The boiler is reporting a malfunc-
tion via the eBUS.
See the manual for the boiler
VRS 620 failure VF 1" The VF1 inlet sensor is defective.
VR 60 (4) VFa fault,
VIH-RL sensor T1 error,
VPM W (1) sensor T1 error,
...
Information displayed:
the affected component
the affected sensor with its
designation on the ProE
connector strip
Possible causes:
a break
a short circuit on the affected
sensor.
HK1 temperature error The target temperature for the
heating circuit has not been rea-
ched after a defined time.
This time is set by the expert tech-
nician in Menu C11:
Parameter "Temp. fault detection
after; Default: OFF).
Setting range: OFF, 0 - 12 h
When combined with a hot water cylinder, the following errors
can be displayed:
External current anode
fault
The external current anode moni-
toring in the VIH-RL has detected
a fault.
VIH-RL Limescale in heat
exch.
The VIH-RL electronics have
detected that the heat exchangers
need to be serviced.
Table 6.1: Error messages and causes
Further error codes and descriptions of their causes can
be found in the manuals for the components of your
heating installation.
6.3 Detecting and rectifying malfunctions
The display remains dark or does not respond to any
operations
If the display remains dark or you are unable to make
any changes to the display using the knobs, contact
your expert technician.
The controller is displaying an error message
i
If the 2nd row in the menu displays an error
text you should immediately ask an expert
technician to rectify the fault. Faults may
only be rectified by a qualified expert techni-
cian.
Information on troubleshooting can be found in the
operating manual for the boiler.
>
>
Troubleshooting 6
45


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