Diagnosis - Viessmann MPA51 Operating And Service Instructions

Diagnosis

Faults with fault display on the display and programming unit
(fault codes)
Message codes
Message System characteris-
code tics
A Burner does not start Gas supply pres-
A Burner does not start Lack of gas
c00 Burner does not start
New parameter
memory stick
F Burner is in a fault
state
F1 (flash- Burner does not start Parameter memo-
ing)
F2 (flash- Burner does not start Connected display
ing)
9 On hold program
Cause
sure too low; gas
pressure switch
switches off
Data transfer from
new parameter
memory stick via
password
See fault code
ry stick not plugged
in correctly or faul-
ty
is invalid
Lack of gas at the
VPS gas pressure
switch or safety
chain not closed.
Select fault in the
fault memory. The
burner automati-
cally starts up
again in accord-
ance with the time
program.
Burner starts auto-
matically after
2 min, after 5 min
and then after 1 h.
Diagnosis
Measures
Check gas flow pressure;
check gas pressure
switch
Notify your gas supply util-
ity
Enter password (hexa-
decimal number between
0 and 255 or 00 and FF).
See installation instruc-
tions, burner compo-
nents.
See fault code, steps to
take
Check parameter memory
stick or replace. See in-
stallation instructions,
burner components.
Use current display
Reset by holding down
the reset button until "9"
flashes.
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