Troubleshooting Fault Display; Fault Display; Fault Memory; Fault Codes - Viessmann MatriX Service Instructions For Contractors

Troubleshooting

Fault display

Fault display
If the burner control unit switches to a fault state, the
fault display is automatically activated. The most
recent fault is then displayed. The fault LED is also illu-
minated in the case of a non-lockout fault, or flashes
together with the fault code in the case of a lockout
fault.
Status Service
Fig. 34
Fault code of the most recent fault (see table from
A
page)

Fault memory

The 10 most recent faults are saved and can be called
up. The most recent fault code is shown first, followed
by the preceding codes. If no key is pressed within
20 s the fault memory display terminates automatically.
Note
If the burner does not start up due to a non-lockout
fault without displaying a fault code, the fault memory
may be able to indicate the cause.
To call up the fault codes, press the following keys:
1. S for longer than 2 s,
flashes.
2. until "4" is shown under Service.
3. S "4" will be displayed under Status.
4. / to scroll through the fault memory display.
Service Description
1 Fault codes display
2 Detailed fault codes
3 Clear fault memory

Fault codes

General process errors

Fault is displayed on the display and programming unit
on the burner.
26
1. Remedy the fault. For fault codes and measures,
see chapter "Fault codes". Carry out measures in
the indicated order.
2. Press reset button R for longer than 0.5 s.
The operating display is shown again and the
burner control unit is reset.
5. S the selected fault memory display will be
shown under Status.
6. / to scroll through the fault codes.
To clear the fault memory from the operating display,
press the following keys:
1. S for longer than 2 s,
flashes.
2. until "4" is shown under Service.
3. S "4" will be displayed under Status.
4. until "3" is shown under Service.
5. S "1" is shown under Status and "dEL" under Serv-
ice.
6. S to confirm the deletion. If deleted successfully,
"1" will be shown under Service; if not, "0" will
appear.
7. S To change to the operating display.
Note
Carry out measures in the order given.
All fault codes are saved to the fault memory and the
last 10 can be called up.