Viessmann VITOTRONIC 200 Service Instructions Manual page 64

Troubleshooting
Messages
(cont.)
Message
Code/system characteris-
tics
DA Compressor 2, safety
Compressor stops.
64
Cause
Compressor fault, heat
pump stage 2 (if instal-
led):
■ Compressor thermal
relay has responded.
■ Separate compressor
motor overload relay (if
installed) has respon-
ded.
■ Klixon start-up resistor.
■ If installed:
Three phase monitor
has detected a fault or
is faulty.
Measures
■ Reset compressor ther-
mal relay, check setting,
restore delivered condi-
tion ("Standard set-
ting", see menu struc-
ture).
■ Check compressor
electrical connections,
test coil resistance of
compressor motor.
Check compressor
phase sequence.
■ The switching signal
(from thermal relay,
separate motor over-
load relay) can be tes-
ted at terminal 214.5
(see page 150).
Note
If overheating occurs,
internal motor overload
relay prevents re-enabling
of the compressor for 1-3
hours.
■ If required, have com-
pressor tested by a
refrigeration engineer.