Viessmann VITOTRONIC 200 Service Instructions Manual page 76

Troubleshooting
Message overview
No. of addi- Hexadecimal value of the additional code
tional mes-
0 1
sage
1
X
—
2
— —
4
— —
8
— —
Values from the following example
1. Take the 1st and 2nd digits of the hexadecimal
additional code.
2. Read off the numbers of the additional messages
in the table above.
3. Read the additional messages in the two following
tables.
Additional messages for configuration faults
1st digit of the additional code
Additional message
1st digit
1
2
4
8
Values from example
76
(cont.)
2 3 4 5
X X
— —
X X
— —
X X
— —
— — — —
Cause
Incorrect system scheme for central heating via venti-
lation unit
"Min. suction pressure 5086" set higher than "Low
pressure limit 5099"
"Dual mode temperature external heat source
7B02" set lower than "Shutdown limit, heat pump
dual mode 7B0F"
Parameters for ice store/solar air absorber incorrect
Incorrect solar control unit set ("Type solar control
■
unit 7A00").
AM1 extension not enabled ("External extension
■
7010")
Coolant buffer cylinder is enabled at the same time
■
6 7 8 9 A
X X
— — —
X X X
— —
X X
— — —
X X X
— —
Example:
Additional code read off for "03 Configuration fault":
"3C"
Additional message numbers from the table above:
■ 1st digit ("3"): 1 + 2
2nd digit ("C"): 4 + 8
■
Additional messages read from the following tables:
1: Incorrect system scheme for central heating...
2: "Min. suction pressure 5086" set higher...
4: Cascade via LON is set ("Cascade control 700A"
set to "2"), although...
8: Parameters for circulation pumps...
B C D E
X X
— —
X X
— —
X X X
—
X X X X
Measure
Check and adjust relevant
parameters. If necessary,
restore factory settings (re-
set) and reconfigure sys-
tem.
Contact a heat pump spe-
cialist certified by
Viessmann if the cause of
the fault cannot be re-
moved.
F
X
X
X
X