Diagnosis - Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual

Troubleshooting

Diagnosis

Faults with fault display on the programming unit
Fault
57
Fr
Fault
Mo 57
1
w A
Outdoor sensor
D B G -
1 10
1
Fault
D B G -
2 67
1
Acknowledge? Yes
1
Outdoor sensor
D B G -
1 10
1
To retrieve an acknowledged fault
message
Press for approx. 3 seconds; select
the acknowledged fault by pressing the
or button.
The fault is then displayed
Please note:
The red fault indicator 2 flashes
whenever there is a fault.
80
When a fault message is transmitted,
--Fault-- flashes in the display 1 of the
ºC
programming unit.
Search fault
1. Press
2. Other fault codes which may be
stored can be called up by pressing
the or
Structure of fault display
Fault display
("Plain language" or "Fault")
Fault code
(meaning: see page 70)
Fault number
(1 to 10)
Fault symbol
Faults displayed in plain language
Burner
Fixed high limit
Safety circuit, potential free
Ext. fault
Outdoor sensor
Supply sensor
Boiler sensor
DHW tank temperature sensor 1
(or 2)
Sensor 17A
Sensor 17B
Room sensor
Flue gas sensor
Participant fault
.
button.
The meaning of the fault code is
explained in the table on page 81
onwards.
The fault can be acknowledged
by pressing . The fault message
in the display 1 is blanked out;
the red fault indicator 2 continues
to flash.
The central fault indicator
connected to plug gÖ is switched
off. If an acknowledged fault is not
rectified by 07:00 hrs on the
following day, the fault message
will re-appear in the display.
C1, C8, C9, CA, Cb
Meaning: see table on page 84.
Only displayed if a second DHW
tank temperature sensor is
connected.
Only displayed if the control unit is
coded as the fault manager.