Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 155

Diagnosis (service scans)
Displays
Display Explanation
I [–] Information index (commands, status, versions):
12 digits, 4 different codes possible at each position, hexadecimal dis-
play; observe the subsequent display system
Tsh, Tc [°C] Tsh: Set superheating temperature
Tc: Set hot gas temperature for start of the vapour injection (EVI)
Pmop Max. suction gas pressure ("maximum operating pressure")
[bara] Max. evaporator operating pressure
Ts, Tc [°C] Ts: Actual suction gas temperature
Tc: Actual condensation temperature
Ps [bara] Actual suction gas pressure
Pc [bara] Actual condensation pressure
TI [°C] Actual LPG temperature
x, P [%] x: Last EEV position
P: Most recent set value default for the compressor output, calculated
by the control unit from current heat demand in the secondary circuit
Err [–] Fault index (components, messages):
10 digits, 4 different codes possible at each position, hexadecimal dis-
play; observe the subsequent display system
Display system of information and
fault index
Four different messages are possible at
each position in the information index
and fault index. The control unit displays
these messages with the codes 1, 2, 4
and 8. If several messages are active
simultaneously, the relevant codes are
added hexadecimally. Hexadecimal
totals are unique, i.e. the individual
active codes can be determined accord-
ing to the following table.
(cont.)
Active codes C
Display value
"0"
"1"
"2"
"3"
"4"
"5"
"6"
"7"
"8"
"9"
"A" (≙10)
"B" (≙11)
"C" (≙12)
"D" (≙13)
"E" (≙14)
"F" (≙15)
Troubleshooting
Active codes
1 2 4 8
X
X
X X
X
X X
X X
X X X
X
X X
X X
X X X
X X
X X X
X X X
X X X X
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