dIA
Fault diag-
nosis
*
1
oxx
External unit
axx
Internal device A
bxx
Internal device B
cxx
Internal device C
dxx
Internal device D
StP
Setup de-
termining
the operat-
ing mode
idU
The internal device started first determines the op-
erating mode (standard)
A
–
P Internal device A determines the operating mode
b
–
P
Internal device B determines the operating mode
C
–
P Internal device C determines the operating mode
d
–
P
Internal device D determines the operating mode
FrC
Switch "Default operation" determines the operating
mode
PAr
Parameter
change
CHg Change parameters
rSt
Reset to factory settings
Stt
Status
*
2
IdU
Internal de-
vice
ICt
Tempera-
ture at the
heat ex-
changer of
the internal
device
A
Internal de-
vice A
b
Internal de-
vice B
C
Internal de-
vice C
d
Internal de-
vice D
oPr
Operating
mode
A
Internal de-
vice A
b
Internal de-
vice B
C
Internal de-
vice C
d
Internal de-
vice D
Ld
Last
A
Internal de-
vice A
b
Internal de-
vice B
C
Internal de-
vice C
d
Internal de-
vice D
Diagnosis
(cont.)
32
Troubleshooting
5692
689
GB
*1
"xx" represents the fault code.
*2
FLt is displayed in case of a sensor fault. dIS is displayed if a sensor has been disabled.