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Troubleshooting
Logamatic EMS RC25 programming unit - Subject to technical modifications
38
8
A11 803
1)
Date is not yet
set.
Restricted functionality
for:
All switching
programs
Holiday function
Fault messages
Date details are
missing, e.g. due
to lengthy power
failure.
B Enter the current
date.
A11 816
1)
No
communication
with RC30/
RC35.
RC25 unable to transmit
data to RC30/RC35.
Room temperature
control therefore not
possible for HC.
RC25 address
incorrect.
B Check address
(parameter P1) in
the RC25
programming
unit.
RC30/RC35 not
present or not
connected
correctly.
B Check
connection to
RC35.
A18 802 Time is not yet
set.
Restricted functionality for:
All switching
programs
Fault messages
Time details are
missing, e.g. due
to lengthy power
failure.
B Enter the current
time.
A18 825
1)
Two master
programming
units in the
system.
RC35 and RC25 are both
controlling heating circuits
and DHW. Subject to the
selected heating
programs and the required
room temperatures, the
heating system may no
longer function correctly.
DHW heating is
malfunctioning.
Both RC25 and
RC35 are logged
on as master.
B Change
parameter P1
in the RC25 or
remove RC35
from the EMS
BUS.
A18 825 Room
temperature
sensor for HCx
is faulty.
Room temperature for
the heating circuit of that
programming unit can no
longer be regulated.
Temperature
sensor in the RC25
programming unit
faulty (
A18
= sole
programming unit;
x=
1
4
,
corresponds to
heating circuit
address 1 – 4).
B Replace RC25
programming unit
for this heating
circuit.
A2x
1)
SC FC Fault
Effect on control
characteristics
Possible cause Remedy
Tab. 3 Fault table
38


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