Bosch Condens 7000 F - Status Indicator of the Burner Control Unit

Operating and fault displays
53
Condens 7000 F – 6720871560 (2019/11)
Table 17 Fault displays1) V = locking; B = blocking
14.4 Status indicator of the burner control unit.
The lighting of the reset button displays the current operating condition.
Table 18 Display of the operating condition of the burner via the lighting of the reset button.
... Permanently
 Off
 GREEN
V EE 612 Readings of the
return
temperature
sensor
Successive return
temperature readings are
too widely divergent.
Check the cable running to the return
temperature sensor and the
contacts.
Check plug-in connector.
 Replace if damaged.
 Clean if dirty or replace if necessary.
 Reconnect any loose plugs.
Check sensor readings against table.  Replace temperature sensor if there
are discrepancies.
Burner control unit defective.  If the connecting lead, contacts and
resistance values are all OK, replace
the burner control unit.
V EE 613 Flow temperature
sensor reading
Successive flow
temperature readings are
too widely divergent.
Check the cable running to the flow
temperature sensor and the
contacts.
Check plug-in connector.
 Replace if damaged.
 Clean if dirty or replace if necessary.
 Reconnect any loose plugs.
Check sensor readings against table.  Replace temperature sensor if there
are discrepancies.
Burner control unit defective.  If the connecting lead, contacts and
resistance values are all OK, replace
the burner control unit.
V LL 571 Too many restarts
despite resetting.
15 restarts have occurred
in direct succession. This
means that the same
problem persisted after
the resets.
Please note: this fault can
only be reset via the reset
button on the burner
control unit.
Faults have continually been reset
and not rectified.
 Identify and eliminate the cause of
the faults leading to the resets.
V LP 570 Too many resets
via the interface.
Too many resets have been
received via the interface
within a certain period.
Please note: this fault can
only be reset via the reset
button on the burner
control unit.
Faults have continually been reset
and not rectified.
The basic controller has developed a
fault, which is causing constant
resets.
The burner control unit has
malfunctioned.
 Identify and eliminate the cause of
the faults leading to the resets.
 Replace basic controller.
 Replace burner control unit.
Type
1)
Error
code
Sub-
code
Cause Description Test procedure/Cause Action
Operating condition Colour code Lighting of the reset
button
Burner control unit is in operation ................................................................................................................... on
The burner control unit is in the
locked-out fault status
............................................................. flashes slowly
The boiler control unit is in
emergency operation,
communication disrupted
 flashes quickly
The burner control unit is not in
operation
.................................................................................................................. Off