Buderus MCM10 - MCM10 Operating and Fault Displays; MCM10 Module LED Indicators

5
Operating and fault indications
MCM10
15
3 Switching
contact for
remote
fault indica-
tion
120 VAC
Operation: Switch-
ing contact not acti-
vated; not a fault.
– Fault: no heating
appliance attached
to the MCM10 oper-
ational.
Remove fault(s) on
the heating appli-
ance(s).
Fault: Switching
contact activated,
but no line voltage.
Check power sup-
ply.
Replace MCM10
module.
Fault: Supply tem-
perature sensor
defective.
Check temperature
sensor on the
MCM10 master and
its lead.
Replace the
MCM10 module.
Fault: System pres-
sure too low.
Add water to the
system.
Fault: no communi-
cation between the
MCM10 module
and all connected
heating appliances
for at least 1 minute.
Check the corre-
sponding connec-
tion cable.
Replace MCM10
module.
4 Communi-
cation
Operation: No
communication
between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS).
Standard operating
mode with only one
MCM10 module or
with the MCM10
master without
2-wire BUS control-
ler.
Operation:
Communication
between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS).
– Configuration:
Communication
between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS).
Wait until the con-
figuration has com-
pleted. The LED will
then be illuminated
steadily.
Fault: No communi-
cation between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS).
Check the corre-
sponding connec-
tion cable.
Replace the
MCM10 module or
heating controller.
Fault: No communi-
cation between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS),
although these com-
ponents are
installed.
Check the corre-
sponding connec-
tion cable.
Replace the
MCM10 module or
heating controller.
Fault: No communi-
cation between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS)
because these com-
ponents have been
deliberately
removed
Reset the configura-
tion
(Æ paragrahp 4.3).
LED OFF ON Flashing
No. Function Diagnosis Remedy Diagnosis Remedy Diagnosis Remedy
Tab. 9 Operating and fault indications on the MCM10 module