Troubleshooting And Diagnosis; Error Messages On The Controller; Activating Emergency Mode; Errors/Malfunctions That You Can Remedy - Vaillant geoTHERM VWS Serie Instrucciones De Uso

5.12

Troubleshooting and diagnosis

5.12.1 Error messages on the controller

Error messages appear roughly 20 seconds after the
error has occurred in the display and are written in the
error memory of the controller if the error persists for
roughly 3 minutes. The engineer can then call up the
error message from the memory at a later date.
Error History
Fault number
Fault code
16.02.08 07:18
Error CH circuit
Sensor T3 heat source
Fig. 5.7 Error message in the error memory Menu I1
The geoTHERM control system has various malfunction
types:
– Malfunction of components which are connected via
eBUS.
– Temporary shutdown
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
after the cause of the fault has been removed by the
expert technician and the error reset.
– Moreover, other errors/malfunctions can occur on
the unit or system.
a
Caution!
Heat pump malfunction!
Immediately notify your expert techni-
cian if error messages appear on the dis-
play on the operating panel which are
not listed in tables 5.4 to 5.7.
Do not attempt to remove the source of
the malfunction yourself.
h
Note!
Not all of the following listed malfunc-
tions have to be dealt with by an expert
technician.
If you are unsure whether you can reme-
dy the fault yourself or not or if the
error occurs repeatedly contact your
expert technician or Vaillant customer
service.
Operating Manual geoTHERM VWS/VWW 0020051578_01
All manuals and user guides at all-guides.com

5.12.2 Activating emergency mode

Depending on the type of malfunction the expert techni-
cian can set the heat pump to continue operation in
emergency mode (via an integrated electric auxiliary
heating) until the cause of the error is remedied, and ei-
ther for heating operation (display "heating priority"),
for hot water operation (display "hot water priority") or
for both (display "heating priority/hot water priority"),
see the following tables, column "emergency operation".
I1

5.12.3 Errors/malfunctions that you can remedy

>1
41
Table 5.4 Other malfunctions

5.12.4 Warning messages

The following warning messages do not cause a mal-
function in the operation of the heat pump. The heat
pump is not shut down.
Take note of the error code and text and discuss this
during the next inspection with the expert technician.
Table 5.5 Warning messages, no shutdown
Malfunction sign Possible cause
Noise in the heating Dirt in the heating
circuit. circuit.
Faulty pump.
Air in the heating
circuit.
Fault code Error text/description
26 Overheating on compressor pressure side
36 Low brine pressure
Operation 5
Solution
Bleeding heating
circuit.
GB 25