Operating instructions

Troubleshooting
Logamatic EMS RC35 programming unit - Subject to technical modifications
52
10
A18 825 Two master
operating
units in
system.
RC35 and RC2x
regulate both heating
circuits and DHW.
Subject to the
selected heating
programs and the
required room
temperature, the
heating system may no
longer function
correctly.
DHW heating is mal-
functioning.
RC2x and RC35 are
both logged on as
master.
B Change parameter
P1 in RC2x or
remove RC35 from
the EMS BUS.
A2x 806 Room
temperature
for HCx is
defect.
Since the actual room
temperature is
missing, the following
cannot function:
• Room influence (for
weather-
compensated
control)
• Switching point
optimisation
In the case of room
temperature-
dependent control, the
system is regulated to
max. temperature for
HCx.
Faulty integral
temperature sensor on
the heating circuit's
programming unit /
remote control unit.
B Replace the remote
control unit.
A2x 816 No commu-
nication with
operating
unit HCx.
Since the actual room
temperature is
missing, the following
cannot function:
• Room influence
• Switching point
optimisation
RC2x incorrectly
addressed, wired or
faulty.
Heating circuit has not
been registered on the
RFM20.
B Check address in
RC2x.
B Check function and
connection of the
remote control unit.
B Replace the remote
control unit.
SC FC
Events
display
Effect on control
characteristics Possible cause Remedy
Tab. 21 Fault table