Error handling and diagnosis
BK9055 and BK9105 53Version: 2.0.0
LEDs for K-Bus diagnosis
Error code Error
Argument
Description Remedy
Persistent,
continuous
blinking
EMC problems • Check power supply for overvoltage or
undervoltage peaks
• Implement EMC measures
• If a K-Bus error is present, it can be localized by
a restart of the coupler (by switching it off and
then on again)
1 pulse 0 EEPROM checksum error Set manufacturer’s setting with the KS2000
configuration software
1 Code buffer overflow Insert fewer Bus Terminals. The programmed
configuration has too many entries in the table
2 Unknown data type Software update required for the Bus Coupler
2 pulses 0 Programmed configuration has
an incorrect table entry
Check programmed configuration for correctness
n (n > 0) Table comparison (Bus
Terminal n)
Incorrect table entry
3 pulses 0 K-Bus command error • No Bus Terminal inserted
• One of the Bus Terminals is defective; halve the
number of Bus Terminals attached and check
whether the error is still present with the
remaining Bus Terminals. Repeat until the
defective Bus Terminal is located.
4 pulses 0 K-Bus data error, break behind
the Bus Coupler
Check whether the n+1 Bus Terminal is correctly
connected; replace if necessary.
n Break behind Bus Terminal n Check whether the Bus End Terminal KL9010 is
connected.
5 pulses n K-Bus error in register
communication with Bus
Terminal n
Exchange the nth bus terminal
6 pulses 0 Error at initialization Exchange Bus Coupler
1 Internal data error Perform a hardware reset on the Bus Coupler
(switch off and on again)
2 DIP switch changed after a
software reset
Perform a hardware reset on the Bus Coupler
(switch off and on again)
4 DIP switch incorrect for BootP
Set 1-8 to on or off, see BootP [}25]
8 Internal data error Perform a hardware reset on the Bus Coupler
(switch off and on again)
16 Error in IP socket Perform a hardware reset on the Bus Coupler
(switch off and on again)
14 pulses n nth Bus Terminal has the wrong
format
Start the Bus Coupler again, and if the error
occurs again then exchange the Bus Terminal
15 pulses n Number of Bus Terminals is no
longer correct
Start the Bus Coupler again. If the error occurs
again, restore the manufacturers setting using the
KS2000 configuration software
16 pulses n Length of the K-Bus data is no
longer correct
Start the Bus Coupler again. If the error occurs
again, restore the manufacturers setting using the
KS2000 configuration software