Viessmann VITOTRONIC 200 Service Instructions Manual page 83

Diagnosis (service scans)
Posi- Active
tion code
6 1
2
4
8
7 0
(cont.)
Explanation
Condensation tem-
perature too high.
Condensation
pressure too high
(control high pres-
sure).
Suction gas super-
heating tempera-
ture too low.
Suction gas super-
heating tempera-
ture too high.
N/A
System charac-
teristics
Compressor is
switched off.
—
Troubleshooting
Measures
Check heat transfer
in secondary circuit
■ Check secondary
pump
■ Check set tem-
peratures for
DHW heating or
heating of the
heating water buf-
fer cylinder.
as for "D4 Control
high pressure"
(see page 63).
■ Check whether
the correct coding
card is fitted.
■ In the case of
repeat occurren-
ces: Have refrig-
erant circuit tes-
ted by a refrigera-
tion engineer.
83