5
Troubleshooting
Fault messages
Three different error messages may appear on the
main screen page ("HOME") of the room tempera-
ture controller:
n
Mains power fault
n
!
Unit error
n
E
2
P
Programming error / data loss in the high-
speed memory
The message "Mains fault" appears in the event
of transmission faults between the remote control
and the processor(s) of one or more connected
units.
The message "Unit error"
!
appears in the event
of malfunctions of one or more of the units con-
nected to the remote control.
For the fault message
E
2
P
, see below in this sec-
tion.
If one or more fault symbols appear, you can use
the
key to display the error and operating
states of the units directly in the "CPU-Smart"
menu.
10:15
CPU-Smart
N.
Cod
Tout
M
01
F21
0008
02
===
0000
03
===
0005
OK
RST
TOUT
N. 01
10:15
CPU - 1
10:15
HOME
SET: 18°C
20.0
°C
OK
000 %
!
Mon 01 Jan
Mon 01 Jan
Mon 01 Jan
Reset Störungen
Parameter Visualisierung
Parameter schreiben/lesen
Reset malfunctions
Read/write parameters
Visualisation parameters
Fig. 38: Fault messages
41
