95
Cause
Measure
Flue gas temperature sensor disconnection
■
Check the flue gas temperature sensor: See chapter
"Checking temperature sensors"
■
Without flue gas temperature sensor: Set parameter
"1F:0" in the
"Boiler"
group.
BF Incorrect LON communication module
■
Control mode
■
No communication via LON
Cause
Measure
Incorrect LON communication module
Replace LON communication module.
C1 External safety equipment on boiler
Boiler cools down.
Cause
Measure
External safety equipment on plug
aBÖ
Check the connection and external safety equipment:
See chapter "Connecting external safety equipment"
C2 Communication error, solar control unit
Control mode
Cause
Measure
Lead break, KM-BUS to solar control module, type SM1
or to the Vitosolic
Check KM-BUS cable and appliance.
Without solar control unit:
Set parameter "1A:0" in the
"General"
group.
C3 Communication fault, extension AM1
Control mode
Cause
Measure
Communication fault, extension AM1
Check connections.
Without AM1 extension:
Set parameter "30:0" in the
"General"
group.
C8 Fault message module 1, input 1: Water level limiter
Boiler cools down.
Cause
Measure
Fault, low water indicator at "X7" of plug-in adaptor 1
for external safety equipment
Check the system water level.
Resetting the low water indicator: See chapter "Plug-in
adaptor for external safety equipment"
C9 Fault message module 1, input 2: Max. pressure 1
Boiler cools down.
Troubleshooting
Fault messages
(cont.)
5863679
Diagnosis
Summary of Contents for Vitotronic 11 CC1E
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