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Troubleshooting
Logamatic EMS RC35 programming unit - Subject to technical modifications
54
10
A3x 807 HCx flow
sensor is
defect.
The heating circuit
pump continues to be
controlled with
reference to the
default value.
The actuator is
switched to zero volt
and remains in the last
active state (manually
adjustable).
Temperature sensor is
incorrectly connected
or fitted.
Breakage or short cir-
cuit in the sensor lead.
Temperature sensor is
faulty.
B Check sensor
connection and
sensor lead.
B Check sensor
mounting.
B Compare resistance
values with the
sensor curve.
A3x 816 No commu-
nication with
HCx mixer
module.
Heating circuit x
cannot be operated
correctly.
MM10 and actuator
(mixer) are running
independently in
emergency mode.
Heating circuit pump
is being continuously
actuated.
Monitor data in RC35
is invalid.
Heating circuit
addresses on MM10
and RC35 do not
match.
B Check rotary coding
switch on MM10.
MM10 or BUS cable
incorrectly connected
or faulty.
RC35 does not
recognise MM10.
B Check connections
on MM10 and BUS
cable.
B Replace MM10.
Hxx Service
message, no
plant error.
The heating system
keeps operating as far
as possible.
Example: service
interval has expired.
Maintenance is
required, see boiler
documentation.
System faults do not need resetting. Contact your local service engineer or your
Buderus sales office if you cannot remedy the system fault yourself.
Other faults are described in the documents relating to the individual boiler.
SC FC
Events
display
Effect on control
characteristics Possible cause Remedy
Tab. 21 Fault table
54


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Others manual(s) of Buderus Logamatic EMS RC35

Buderus Logamatic EMS RC35 User Manual - English - 60 pages

Buderus Logamatic EMS RC35 Installation Guide - German - 60 pages

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Buderus Logamatic EMS RC35 Installation Guide - Dutch - 48 pages


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