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Installation instructions geoTHERM VWS/VWW 0020051574_01
10.2
Malfunctions of eBUS components
Fault code Error text/description
Possible cause
Solution
1
XXX address YY not accessible
A component XXX connected via the
eBUS, e.g. VR 60 with the address YY
is not recognised.
Check the eBUS cable and plug.
Check that the address switch is correctly set.
4
XXX address YY sensor fault
ZZZ
A sensor ZZZ on one of the compo-
nents XXX connected via the eBUS,
with the address YY, is defective.
Check the ProE plugs on the PCBs, check the sen-
sor for correct functioning, replace sensor.
5
XXXX setpoint not achieved
XXXX setpoint not achieved.
Check temperature setpoint.
Check position of temperature sensor.
Deactivate temperature error detection (C13).
Table 10.1 Malfunctions of eBUS components
10.3
Displays in the error memory and under
"Warning message"
The heat pump, including the compressor, remains in
operation. The following errors are displayed in the
error memory and in Menu 1 as warning messages.
Fault code
Error text/description
Possible cause
Solution
26
Overheating on compressor
pressure side
Excessively high output with a high
flow temperature.
Reduce the heating curve. Check the required
heating output (floor drying, building shells) and
reduce if necessary.
36
Low brine pressure
Pressure drop in the heat source sys-
tem as a result of leakage or air lock.
Pressure < 0.6 bar
Check heat source system for leaks, top up brine,
bleed.
Table 10.2 Display in error memory and under "Warning
message" in Menu 1, no shut-down
Troubleshooting and diagnosis 10
