4. E in the display indicates that the
burner control unit is locked out.
After the fault has been removed,
acknowledge by pressing reset E.
Fault display design
A Fault symbol
B Plain text fau lt displa y ( only for
weather-comp ensated control
units)
C Fault number
D Fault code
Plain text fault display
&
Burner control unit
&
Outside tempe rature sensor
&
Flow sensor
&
Boiler sensor
&
Mixed flow sensor
&
DHW cylinder sensor
&
Flue gas sensor
&
DHW outlet sensor
&
Room temperatur e sensor
&
Collector sensor
&
Solar DHW sensor
&
Remote control
1. Calling up acknowledged fault
messages
Press d for approx . 3 seconds.
The fault will then be displayed.
2. Select the acknowledged fault
with a or b.
Checking and acknowledging faults
Weather-compensated control units
Red fault indicator U flashes for all
faults.
A fault message code flashes in the
programmin g unit displa y when a fault
message is issued.
Any fault codes present may be called
up with a or b.
Calling up current fault codes (cont.)
76
Troubleshooting
5692 537 GB
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