Vaillant geoTHERM VWS Series, Installation Instructions Manual

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Installation instructions geoTHERM VWS/VWW 0020057444_01
– Temporary shut-down
The heat pump remains in operation. The error is dis-
played and disappears independently when the cause
of the fault is removed.
– Fault-induced shutdown
The heat pump is shut down. It can only be restarted
by resetting the error after removing the cause of the
fault (see Menu I 1).
– In addition, other errors/malfunctions can occur on
the unit or system.
10.2 Malfunctions of eBUS components
Fault code Error text/description Possible cause Remedy
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 Remedy
26 Overheating on pressure side of
compressor 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 Brine pressure low 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 mes-
sage
"
in Menu 1, no shut-down
Troubleshooting and diagnostics 10