Logamatic EMS – 6 720 801 387 (2011/05)
59
Troubleshooting
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 circuit 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
communicati
on 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 terminals
on MM10 and
check bus cable.
B
MM10Replace .
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 Error display
Effect on control
characteristics
Possible cause
Remedy
Table 23 Fault table
Содержание Logamatic EMS RC35
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